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• Open access
• Published: 21 December 2020

The shift to 6G communications: vision and requirements

• Muhammad Waseem Akhtar 1 ,
• Syed Ali Hassan 1 ,
• Rizwan Ghaffar 2 ,
• Haejoon Jung 3 ,
• Sahil Garg 4 &
• M. Shamim Hossain   ORCID: orcid.org/0000-0001-5906-9422 5  

Human-centric Computing and Information Sciences volume  10 , Article number:  53 ( 2020 ) Cite this article

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128 Citations

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The sixth-generation (6G) wireless communication network is expected to integrate the terrestrial, aerial, and maritime communications into a robust network which would be more reliable, fast, and can support a massive number of devices with ultra-low latency requirements. The researchers around the globe are proposing cutting edge technologies such as artificial intelligence (AI)/machine learning (ML), quantum communication/quantum machine learning (QML), blockchain, tera-Hertz and millimeter waves communication, tactile Internet, non-orthogonal multiple access (NOMA), small cells communication, fog/edge computing, etc., as the key technologies in the realization of beyond 5G (B5G) and 6G communications. In this article, we provide a detailed overview of the 6G network dimensions with air interface and associated potential technologies. More specifically, we highlight the use cases and applications of the proposed 6G networks in various dimensions. Furthermore, we also discuss the key performance indicators (KPI) for the B5G/6G network, challenges, and future research opportunities in this domain.

Introduction

Next-generation communication systems aim to achieve high spectral and energy efficiency, low latency, and massive connectivity because of extensive growth in the number of Internet-of-Things (IoT) devices. These IoT devices will realize advanced services such as smart traffic, environment monitoring, and control, virtual reality (VR)/virtual navigation, telemedicine, digital sensing, high definition (HD), and full HD video transmission in connected drones and robots. IoT devices are predicted to reach 25 billion by the year 2025 [ 1 ], and therefore, it is very challenging for the existing multiple access techniques to accommodate such a massive number of devices. Even fifth generation (5G) communication systems, which are being rolled out in the world at the moment, cannot support such a high number of IoT devices. Third generation partnership project (3GPP) is already working on the development of 5G standard and has identified massive machine type communication (mMTC), ultra-reliable and low latency communication (URLLC), and enhanced mobile broad band (eMBB) as three main use cases for 5G in its Release 13 (R13) [ 2 ].

At the same time, algorithms for the next generation communication systems, which will have the performance higher than that of existing 5G networks, are being developed [ 3 ]. A typical 5G communication system has the capability to support at most 50,000 IoTs and/or narrowband IoT (NB-IoT) devices per cell [ 2 ]. Specifically, a more robust network must be designed to realize the massive access in beyond 5G (B5G)/6G communication systems. We now discuss comprehensive literature that has appeared on various dimensions of 6G networks.

Vision and literature survey

Currently, there is little information about the standards of 6G. However, it is estimated that the international standardization bodies will sort out the standards for 6G by the year 2030 [ 4 ]. The work at some of the research centers has shown that 6G will be capable of transmitting a signal at a human computational capability by the year 2035 [ 5 ]. While the rollout of 5G is still underway, the researchers across the world have started working to bring a new generation of wireless networks. A tentative timeline for the implementation of 5G, B5G, and 6G standards by international standardisation bodies is shown in Fig.  1 with respect to the vision of 6G wireless networks. International Telecommunication Union Radiocommunication sector  (ITU-R) issued the requirements of International Mobile Telecommunications-2020 (IMT-2020 Standard) in 2015 for the 5G network standards. At the same time, 3GPP issued R13 for 5G standards. It is predicted that ITU will complete the standardization of 6G (ITU-R IMT-2030) by the end of the year 2030, whereas 3GPP will finalize its standardization of 6G in R23 [ 5 ]. ITU has established a focus workgroup for exploring the system technologies for B5G/6G systems in July 2018 [ 7 ]. The Academy of Finland has founded, 6Genesis, a flagship program focusing on 6G technologies, in 2018 [ 8 ]. Similarly, China, the United States of America, South Korea, Japan, Russia have also started the research for B5G/6G communication technologies [ 4 , 5 , 9 , 10 , 11 ].

A tentative timeline of standards development for 5G, B5G, and 6G [ 4 , 6 ]

The vision of 5G technologies is extended for the 6G networks by speculating the visionary technologies for next-generation wireless systems in [ 5 ]. Different networking scenarios are presented in [ 12 , 13 , 14 , 15 ]. The authors in [ 12 ] and [ 13 ] give a predictive technical framework for industries in future generations of communication systems mainly focusing on the specifications of future generations of the communication system. Cell-less architecture, decentralized networking, and resource allocation, and three-dimensional radio connectivity including the vertical direction are expected in next-generation communication systems. The evolution of wireless systems from 1G to 6G is outlined in [ 14 ]. The authors in [ 15 ] presented the role of intelligent surfaces in the architecture of 6G networks.

The authors in [ 16 , 17 , 18 , 19 ] presents the expected technologies, possible applications of 6G. The articles [ 20 , 21 , 22 , 23 , 24 ] present the system-level perspective of the 6G scenario with use cases, vision, and technologies. The authors in  [ 25 ] analyze the application of blockchain for the security and privacy measures in upcoming 6G networks. The potential role of optical communication in 5G/B5G and 6G communication networks is described in [ 5 ]. The article [ 26 ] presents the feasibility of the application of mmWave communication in satellite communication as an enabler of 6G networks. The article [ 27 ] gives an analysis of potential applications of device-to-device communication in 6G. The authors in  [ 9 , 28 , 29 , 30 ] elaborate on the multiple challenges in integrating artificial intelligence (AI) and its potential role in future communication networks.

The authors in [ 31 , 32 ], have focused on the vision for the next generation of wireless communication systems. Blockchain and AI are the potential technologies for the next generation communication systems. Blockchain can be used for efficient resource sharing and AI can be implemented for the robust, self-organizing, self-healing, and self-optimizing wireless network [ 33 ].

By using millimeter-wave (mmWave) and terahertz (THz) frequency bands, massive bandwidth, and highly directive antennas will be available to the 6G mobile devices to enable new applications and seamless coverage [ 33 ]. Federal Communications Commission (FCC) has commercialized these frequency bands in 2019 [ 34 ]. Ultra-high-precise positioning will become available with 6G due to high-end imaging and direction-finding sensors, just like human eyes and ears. 6G mobile phones could be equipped with capable robots and intelligent algorithms [ 5 ].

The latency of the network in 6G will be minimized by using super-fast and high computational power processors both at the network and end devices. The mobile phone of the future network will be intelligent enough to sense the environment and give the precautionary and preventive measures. For example, these mobile phones will be capable to detect the air pollution level, toxic food materials, and explosive materials around us. These phones will replace the wallet, hard cash, and wristwatches by providing digital currencies, and smartwatches, respectively. Similarly, smart goggles will replace glasses and smartphones. It is anticipated that 6G cellphones, coupled with the incredibly high directive and beam-steering antennas, would be capable enough to see through the walls by reconstructing the images by receiving the signals from multiple levels of density of the environment in the vicinity [ 9 ]. This feature would be useful for extracting minerals and elements from rocks, exploring underground natural reserves, and detecting arms. Apart from this, 6G mobile phones will have tremendous features of providing position, location, and range with very high accuracy. This will be helpful for maritime and underwater communication and positioning.

Self-driving cars, which are already being developed in the initial phase these days, would make human life safer and more comfortable [ 5 ]. Holographic technologies and VR/augmented reality (AR) will break the barrier of distances. The digital revolution has transformed the way we play, talk, or work. In the recent era of the digital revolution, 5G has become the center of attention for everyone. Soon the mobile devices in our pockets will get the wireless speed approaching the fiber optic transmission speed, bringing 3D imagery, television, online games, and many other applications that we never imagined into our tablets or mobiles.

Special attention is paid to the improvement of the traffic prediction in [ 35 ]. Following the 6G vision and service requirements, some use case scenarios for the 6G, such as autonomous vehicles, smart cities, flying networks, holographic, telemedicine, and Tactile Internet, are discussed in [ 36 ]. Moreover, the reliability of the future wireless network is forecasted to be at the same or higher level as that of today’s wired communication networks.

Some potential key enabling technologies encompassing blockchain-aided decentralization of the network and machine learning (ML)-based intelligent communication system for the 6G are discussed in [ 37 ]. A comparative analysis between the key performance indicators (KPIs) for 5G and 6G is carried out in [ 31 ]. Practical applications including holography, ML, VR, Internet-of-Things, visible light communication (VLC), automated driving is discussed in [ 38 ].

Contribution

The objective of this article is to draw a complete picture of “how the 6G will look like?”. We cover different dimensions and aspects of 6G focusing on the projected 6G system architecture, potential technologies, network dimensions, KPIs, applications, and use cases. The taxonomy of the paper is shown in Fig.  2 , which gives a pictorial view of all sections and subsection presented in this paper. The contributions of this article are summarized as follows.

We discuss in detail about the projected 6G system architecture. We highlight all the essential network elements of 6G system architecture and discuss the new air interface development, application of AI and ML, utilization of new spectrum, the coexistence of variable radio access technologies (RATs), and intelligent and smart beamforming, etc.

6G network dimensions that include, cloudification/fog/edge computing, intelligence, softwarization, and slicing are discussed in detail.

Tactile Internet is one of the main use cases of 6G networks and holographic verticals are the potential application. Space tourism and communication in space, handled by 6G networks, is discussed.

Towards the end, we discuss multiple challenges and research directions that include the increase in chip size, beamforming for mobile users, pre-emptive scheduling, low latency, and high reliability, and variable bandwidth and coverage issues that will be faced due to the coexistence of all networks.

The remaining paper is outlined as follows. The next-generation wireless networks system architecture is described in Sect. " 6G system architecture ". Next-generation network dimensions are given in Sect. " Network dimensions ". Some prominent use cases and applications of 6G communication systems are presented in Sect. " Potential technologies ", followed by potential key enabling technologies for 6G are given in Sect. " 6G application ". Sect. " Key Performance Indicators (KPIs) " describes KPIs for 6G. Research challenges and future directions are given in Sect. " Research challenges and directions " and finally, the paper is concluded in Sect. " Conclusion ".

Taxonomy of the paper

6G system architecture

Next-generation wireless networks will consist of massive number of connected devices and with the base stations (BSs)/access points (APs) leading to mMTC. Multiple BSs/APs may serve one or more devices simultaneously to form a coordinated multi-point (CoMP) transmission [ 39 ]. The huge amount of data produced by massive devices will require very high-performance processing units and robust backhauling links. The central processing units may utilize ML and AI algorithms and the backhauling links may utilize optical fiber and or photonic communications. Remote user, in 6G communication systems, can use several relays or transmitters for a remote user to transmit, and the user’s SINR may be improved by using the technique of diversity as in virtual MIMO systems.

By intelligent networking, all the end devices would be aware of the location and features of BSs/APs in their vicinity, and all of the BSs/APs would be aware of the locations, features, and QoS requirements of devices in their vicinity. Robust interference management/optimization techniques can be applied to maximize the efficiency of the wireless network. Central processing units will be fast enough to manage and switch the resources (bandwidth, time, power) among multiple end-users, and data processing will be conducted at the base-band processing units (BPUs). Figure  3 depicts some of the major components in the 6G system architecture, that will cause a major paradigm shift towards the realization of 6G standards. The air interface is the main component that causes a major improvement in the wireless generations. Orthogonal frequency division multiplexing (OFDM) played a major role in the development of 4G, as code division multiple access (CDMA) was the key player in 3G. Similarly, the development of the new air interface will be an essential component of 6G system architecture.

6G wireless network elements

AI and ML is another crucial component of the 6G system architecture. AI and ML will play an important role in the self-organization, self-healing, self-configuration of 6G wireless systems. Spectrum congestion has also pushed the 6G to adopt a new spectrum for communication. Therefore, this new spectrum will also be an active component in the 6G system architecture. Since 6G will accommodate a wide range of communication devices ranging from IoTs to live HD video transmission, 6G will need to be in line with all previous technologies. Therefore, a flexible and multi-radio access technologies (RAT) system architecture will be an essential component in the 6G network.

Air interface

Since 6G will concentrate on the current terahertz frequency range with extremely wide bandwidths available, it will bring up new obstacles to interact efficiently at these frequencies. Getting a secure transmission infrastructure that has an adequate range and isn’t power-hungry will be the answer here. The availability of incredibly wide bandwidths would change the emphasis from spectrally optimized solutions to improved coverage solutions. In these new frequency spectrums, the tradeoff between spectrum performance, power efficiency, and coverage will play a key role in developing devices. This will lead to the design of a modern air interface where more consideration can be paid to single-carrier systems. The OFDM scheme would be revisited for lower frequency ranges where spectral efficiency will be important as it does not use the energy effectively because of the cyclic prefix, which is just the duplication of information and does not hold any additional information. Furthermore, a high peak-to-average power ratio (PAPR) makes the power amplifiers complex and expensive.

Many researchers have proposed the non-orthogonal multiple access (NOMA) as a promising new scheme for the B5G/6G mobile networks [ 40 , 41 , 42 ]. In NOMA, all of the users are allowed to access the complete resource (frequency band) simultaneously. Some researchers have suggested the rate-splitting multiple access (RSMA) as a new access technology for 6G communication systems [ 43 , 44 , 45 ]. Both NOMA and RSMA rely on the successive interference cancellations (SIC) to decode the information for the user. RSMA uses the SICs to decode the common message firstly and then decode the private message. Both schemes need to be matured enough before practical deployment. A new AI-based software-defined air interface is presented in  [ 46 ], where the authors proposed an intelligent air interface switching system for user QoS enhancement.

3GPP release 15, reveals the specifications for the 5G-New Radios (NR), in which multiple waveform configurations and two sets of frequencies are defined. By adopting the variable numerologies (symbol duration, sub-carrier spacing, and pilot spacing), we can give the transmitter leverage to self-organize and self-configure according to the channel conditions and service required. This is often useful on different measurements. For instance, by reducing the symbol length, low latency can be achieved, and increasing the spacing of the sub-carrier can be helpful in reducing the phase noise in mmWave and sub-mmWave. In high mobility situations, optimizing the sub-carrier width can also be helpful for Doppler shift compensation.

New spectrum

mmWave is already a candidate for 5G, but it is not exploited to its full potential as the beamforming algorithms are not mature enough. It requires improvements in the networks when personal BSs and satellite connectivity can get merged into cellular communication. In the previous generations, the spectrum is divided for multiple services, for instance, television (TV) services, military communications, and cellular communication [ 47 ].

Therefore, the idea of using an unlicensed spectrum is proposed, i.e., to use the mmWave, THz band, and visible light spectrum, simultaneously [ 48 , 49 , 50 , 51 , 52 ]. These bands are never used for any communication. The problem with the higher frequency band, though, is that the signal is attenuated very rapidly about the distance traveled. For example, a 3G or 4G BS can have a coverage of about several miles whereas a 5G or 6G BS coverage may limit to only a few hundreds of meters. To resolve this issue in mmWave and THz communications, the idea of using massive multiple inputs and multiple outputs (MIMO) and beamforming emerged, which is described in the next subsections.

Artificial intelligence/machine learning

By offering pervasive, secure, and close proximity-instant wireless networking for humans and computers, 6G wireless communication networks would be the core of society’s digital transition. A broad variety of emerging developments, such as self-driving cars and voice assistants, have been made possible by recent advancements in ML research. B5G/6G wireless networks have increased complexity, requiring smarter methods for handling any losses and handling network features, detecting anomalies, and understanding KPI trends. This can be done by introducing solutions for ML and SDN. In order to preserve a certain level of KPI, ML/AI will boost the decision-making process. The operation and implementation of RAN for 6G needs a new strategy. Incorporating AI in wireless algorithms (e.g., for channel estimation, for channel state information (CSI) feedback, and decoding, etc.) may bring a change in the direction of these algorithms [ 53 ]. Application of ML, DL [ 54 ], and AI algorithms to the communication network, we can instantly manage the resources as per the user requirements. The probability of choosing the best solution is improved in this way and the network can maintain its optimum state.

Advanced beamforming with very large scale antenna (VLSA)

The idea of beamforming is to steer the beam to only the desired direction or user. Since energy is not spread in all directions, the transmission range is thus improved by concentrating the beam in one direction.

Intelligent reflecting surfaces (IRSs)

Intelligent Reflecting Surfaces (IRSs) can be the potential area for beamforming in 6G [ 55 ]. IRSs are composed of thin electromagnetic materials, which can reflect/configure the incoming electromagnetic rays in an intelligent way by configuring the phase of reflected rays by a software [ 55 ]. Indeed, IRSs use at a large number of low-power and low-cost passive elements to reflect the incident signals with configurable phase shifts without the requirements of additional power, encoding, decoding, modulation, demodulation requirements. IRSs are installed on the important points and locations such as high-rise buildings, advertising panels, vehicles  (cars, airplanes, unmanned aerial vehicles (UAVs)), and even the clothes of the pedestrians. The main advantage of the IRS is that it can enhance the signal-to-interference-plus-noise-ratio (SINR) with no change in the infrastructure or the hardware of the communication network. Also, there is no need for extra power required for the installation.

IRS can reduce the hardware complexity at the receiver and the transmitter by reducing the number of antennae installed at them, thereby, reducing the radio frequency (RF) chains at the transmitter and the receiver. IRS can replace the conventional relays system due to its advantages in terms of power, spectral efficiency, and reduced hardware complexity [ 56 ]. IRS can be used in the deep-fade and non-line-of-sight (NLOS) communication environment. The principle by which SINR is enhanced at the receiver is optimally controlling the phases of the incident ray at multiple elements of the IRS, to produce useful beamforming at the receiver [ 56 ]. Degradation factors such as noise and interference have no impact on the IRS. All these features of the IRS make it a promising technique for the B5G/6G communication systems.

Orbital angular momentum (OAM)-aided MIMO

A new dimensional property of the electromagnetic waves (EW) was discovered in the 1990s termed as the orbital angular momentum (OAM). This discovery promised the transmission of multiple data streams over the same spatial channel. An EM wave carrying the OAM has the phase rotation factor of \(\exp (-jl\phi )\) , where l is OAM state number represented in integer and \(\phi\) is transverse azimuth angle [ 57 , 58 , 59 ]. The main advantage of OAM over other beamforming techniques is that OAM can have an unlimited number of orthogonal modes, which allows the EW to multiplex multiple data streams over the same spatial channel, thereby, enhancing the spectral efficiency and transmission capacity. OAM support a high number of user in mode division multiple access (MDMA) scheme without utilizing extra resources (i.e., frequency, time, and power). The flexibility of OAM to be used in narrowband and wideband frequency hopping scheme makes it an attractive scheme for low probability of interception (LPI) applications. OAM-based MIMO systems have advantages over the conventional MIMO systems in terms of capacity and long-distance line-of-sight (LoS) coverage [ 60 ]. Therefore, OAM has great potential for applications in 6G wireless networks.

Coexistence of variable radio access technologies

6G can lead to a ubiquitous networking infrastructure where users would not only be left with the option of selecting the best communication network. Each node in this network would, however, be intelligent enough to sense the conditions of the channel and the specifications of QoS at any other node. For example, the use case and the availability of network will decide the network as cellular, wireless LAN, Bluetooth, and ultra-wideband (UWB), etc. 6G communication standard should, therefore, be designed in such a way that it will converge all of the wireless technologies. Communication with Wi-Fi, Bluetooth, UWB, VLC, UAVs, biosensors, and satellite communications can all integrate into 6G and should fall under one standard such that all of them can connect with each other. The Wi-Fi operating at 2.4 GHz has already entered deeply into IoTs as most of the appliances are now connected through this network [ 61 , 62 , 63 ].

By merging all these technologies, 6G would be able to utilize the massive infrastructure deployed by previous technologies, which otherwise can cost 6G a huge revenue. The features in the previous technologies, such as network densification, high spectral efficiency, high throughput, low latency, high reliability, and massive connectivity should be converged in 6G. 6G technology should also keep the trend of offering new services by applying the new technologies, such as AI/ML, VLC, quantum communications (QC), and quantum machine learning (QML). These services may include but are not limited to smart cars, smart homes, smart wearable, and 3D mapping [ 64 ].

Figure  4 gives an overview of the evolution of the wireless generation, with timelines, from 1G to 6G with respect to applications, KPIs, network characteristics, and technology. Figure  4 a shows that a major leap in the application is observed with 4G. 4G introduced mobile Internet, mobile TV, and HD videos. AR/VR, ultra-HD (UHD) videos, wearable devices, vehicle-to-infrastructure (V2X), smart city, telemedicine, and IoTs concepts are introduced in 5G. 6G is projected to have applications such as space tourism, Tactile Internet, fully automated cars, holographic verticals, deep-sea sight, digital sensing, and Internet-of-bio-Nano-things (IoBNT). Figure  4 b shows that how KPIs are changing with the evolution of wireless generations from 1G to 6G. Figure  4 c shows the evolution of the network characteristics with wireless generations. All Internet protocol (IP) and the ultra-broadband concept is introduced in 4G. The concepts of cloudification, softwarization, slicing, virtualization, and wireless worldwide web (WWW) are introduced in 5G. Integration of intelligence with cloudification, softwarization, slicing, and virtualization will be introduced in 6G communication systems. Figure  4 d depicts the evolution of technologies with the development of wireless communication generations. The initial stage of the wireless communication system is the development of the advanced mobile phone system (AMPS). Global systems for mobile (GSM) and general packet radio systems (GPRS) family is developed in 2G wireless systems. Code-division multiple access (CDMA) family shifted the wireless systems from 2G to the 3G. OFDM with the integration of turbo codes and MIMO systems is the key technology for 4G communication systems. 5G communication systems brought some new technologies such as cloud/fog/edge computing, massive MIMO, SDN, mmWave and sub mmWave (NR) along with low-density parity-check (LDPC) and polar codes. ML, AI, blockchain, THz communication, orbital angular momentum multiplexing (OAM Mux), spatial Modulation (SM)-MIMO and intelligent re-configurable reflecting surfaces are the new technological domains in 6G.

Evolution of wireless communication, with timeline, from 1G to 6G based on ( a ) Applications ( b ) KPIs ( c ) Network characteristics and ( d ) Technological development

Network dimensions

In this section, we give an overview of the network dimensions of 6G networks. Network intelligence will be an essential component of 6G networks and the network will take actions dynamically according to the environmental conditions. The idea of clouds, fog, and edge computing is applied for fast access to services. The features of self-optimization, self-organization, self-reconfiguration will be achieved through softwarization, virtualization, and slicing. The detailed discussion on each network dimension is given as follows.

Intelligence

Researchers believe that AI will play a defining role in the IoTs and IoBNTs driven world [ 65 ]. The potential shift from 5G to the 6G will be to determine an efficient way to transmit data. The ideal system will be the one that is free from human intervention at all [ 66 ].

Cloudification/fog/edge

Thousands of sensors are installed in the industries and hundreds of the sensors are installed in homes. It is very difficult to connect all these sensors with wires [ 67 ], and, all these devices can produce a large amount of data. Also, these devices are smart and intelligent, capable of making smart decisions and less processing power. Therefore, we need to offload the data from cloud to edge and device end. To reduce the processing delay, we need to shift the process near to end devices in terms of cloud/fog. We need to place the workload closer to the edge for a better quality of service.

Softwarization

Main driving force behind the development of B5G and 6G networks is to provide services such as self-organization, configurability, programmability, flexibility, and heterogeneous use-cases. It is difficult to install the hardware equipment which provides all of the mentioned functionalities. By realizing the functionalities by underlying networks, softwarization and virtualization have emerged as the two most demanding paradigms for B5G/6G networks [ 68 ].

Softwarization is the term used for the set of interfaces and protocols which can allow the network to be configured in software by decoupling the control and user plane. The user plan usually consists of a set of distributed and stateless routing tables at which packet switching is performed at a very high speed. These tables are updated by the centralized control plan which maintains the end-to-end routing information for multiple services. Data and control management operations are exchanged between the service consumer and the SDN provider [ 36 ]. SDN provider ultimately forwards the required service to the service consumer. These services are controlled by the service consumer by taking acting on these virtual resources.

Virtualization

Network function virtualization enables the software functions to be performed in the virtual machines and allows the access of common shared physical resources such as storage, networking, and computations. Containers are used to instantiate multiple functions within the same virtual machine. Dynamically varying network demand such as offered services and network traffic can be handled by dynamically instantiating the virtual machines.

The services, which can be virtualized, include but are not limited to load management, mobility management, baseband processing unit services, evolved packet core (EPC) functions. Network function virtualization (NFV), unlike traditional mobile networks, provides the leverage to route the packet of each service between virtual network functions (VNFs) [ 69 ]. Further, the routing services are provided with very few overheads. Also, routing and traffic flow are smoothly maintained without any interruption even if a new VNF is added or removed according to the traffic demands.

One of the key network abilities that will allow us to build a flexible network on top of the common physical infrastructure is network slicing. As 5G continues to take shape, network slicing will become the fundamental technology to enable a wide range of use cases. Taking a single piece of network infrastructure and being able to cost-effectively deliver multiple logical networks over the same common physical infrastructure [ 69 ]. The slices can be allocated to some specific use-cases such that we can have a slice for IoTs, slices can be allocated to a class of service, slices can be allocated to a class of customers, slices can be allocated to some specific mobile network operators, slices can also be allocated to network types such as wireless vs wired or consumer vs businesses.

In network slicing, the biggest difficulty is configuring new slices, since it affects all the network components. However, with the need to create customized services and deliver a service with a very specific requirement, we can create slices such as slice for automotive, healthcare, utility.

Figure  5 gives a pictorial overview of the 6G wireless network that covers all aerial-ground-sea communications. As shown in Fig.  5 , 6G will make it possible to communicate with the devices with very low data-rates such as biosensor and IoTs, and at the same time, it will enable high data rate communication such as HD video transmission in smart cities. Communication will be possible in a fast-moving bullet train, airplane. It also shows that all of the networks will be merged all together. Further, the buildings and surfaces in smart cities can be equipped with the IRS that could enhance the coverage and quality of service (QoS) of each communicating device. For the maritime communication scenarios, the robust underwater data links will enable the communication between ships, submarines, and sensors at the deep sea level [ 70 , 71 ]. Besides, innovative technologies such as AR/VR, haptics, and ML will further reduce the effect of physical distances around the globe.

A depiction of space-air-ground-sea based integrated next-generation communication system with a wide range of applications

Figure  6 depicts a comparative analysis of the network architecture of 5G and 6G. The 6G core network is shown to have upgraded to the basic 5G core network based on intelligence, high computational power, and high capacity. By integrating BSs/APs, satellites, and UAVs, the access network is upgraded similarly. There is a vertical hand-off in 6G in addition to the horizontal as in that of 5G. Besides, fog computing and MEC are an integral component of the 6G network infrastructure, that reduces latency and bandwidth utilization for regularly needed services by a massive number of devices on the user plan.

A comparative analysis between 5G and 6G network architecture

Potential technologies

Based on the vision of 6G and its network architecture, we now elaborate on the key enabling technologies for 6G wireless networks in this section. Various state-of-the-art technologies must be utilized together to enable the key features of 6G.

Quantum communication and quantum ML

Quantum technology uses the properties of quantum mechanics, such as the interaction of molecules, atoms, and even photons and electrons, to create devices and systems such as ultra-accurate clocks, medical imaging, and quantum computers. However, the full potential remains to be explored. A quantum Internet is a way of connecting quantum computers, simulators, and sensors via quantum networks and distributing information and resources securely worldwide [ 72 ].

In October 2018, the European Commission launched the Quantum Flagship, a 1 billion Euro project for over ten years involving 5000 scientists to support quantum research in the EU with the goal of creating a quantum Internet [ 72 ]. For the next decade, the EU plans to develop and deploy a secure pan-European QC infrastructure (QCI) to become the backbone of a quantum Internet. QCI will make quantum cryptography a part of conventional communication networks, protecting the EU sensitive data and digital infrastructure and making it possible to exchange information between different countries securely. QCI will combine terrestrial and satellite segments, where the terrestrial one will use the existing fiber communication networks linking the strategic sites within and between countries, the satellite segment will be deployed to cover very long distances across a large area.

Quantum key distribution will be the first service to run this infrastructure [ 73 ]. It provides the sender and the recipient of an encrypted message with an intrinsically secure random key in such a way that an attacker cannot eavesdrop or control the system. It will secure important confidential communication even against code-breaking by future quantum computers. It will provide services such as securely sharing information, digital signatures, authentication services, and clock synchronization. This infrastructure would be beneficial for the economy and society and ensure the security of sensitive government information both from earth, sea, and in the space [ 74 ].

The QC and the QML can be key players in 6G wireless networks. The QC can provide the solutions for the 6G networks in the domain of increased channel capacity, e.g., new multiple access technologies, such as NOMA, RSMA demand very high power on run time for computation of SIC. Similarly, QC and QML can have a considerable role in 6G in the field of channel estimation, channel coding (quantum turbo codes), localization, load balancing, routing, and multiuser transmissions [ 75 ]. In the communication network core side, QC and QML can solve complex problems such as multi-object exhaustive search by providing fast and optimum path selection to the data-packets in ad hoc sensor networks and Cloud IoT [ 76 ].

Blockchain is bringing the revolution to some of the huge industries such as finance, supply chain management, banking, and international remittance [ 77 ]. The concept of blockchain is opening new avenues to conduct businesses. Blockchain provides trust, transparency, security, autonomy among all the participating individuals in the network [ 78 ]. As far as the telecommunication industry is concerned, innovation in a competitive environment with reduced cost is the most important parameter for the successful businesses in the telecommunication industry. The blockchain industry can benefit the telecommunication industry in the following various aspects.

Internal network operations

Smart contracts in Ethereum, which is the second generation of blockchain technologies, have revolutionized the automation system in various applications. Smart contracts allow the computer code to automatically execute when a certain event is triggered. Because of this fact, blockchain has an immense attraction for its applications in the telecommunication industry to automate various operations such as billing, supply chain management, and roaming. Blockchain can prevent the fraudulent traffic in the telecommunication network thereby saving a lot of bandwidth and resources and ultimately increasing the revenue of the operators [ 79 ]. Blockchain can save time for the telecommunication industries and reducing the cumbersome post-billing audit process applying the smart contracts for the authentication and clearance of the bills. Through this process, telecommunication industries can automate accounting and auditing processes.

Blockchain-based digital services

Telecommunication operators can generate new revenues by proving customers with new blockchain-based services such as mobile games, digital asset transactions, music, payments, and other services. Telecommunication industries can also generate some new revenue streams by allowing the customers to transfer money from the user to user [ 79 ].

Digital identity verification

Digital identity verification already costs the government millions of dollars every year. A blockchain-based digital identity verification system can be implemented in the next generation of communication networks which will replace the existing identity verification systems [ 79 ].

Ecosystem for efficient cooperation

Next-generation wireless systems aim to provide a variety of new digital services. Blockchain is an attractive application for the complex transactions initiated for these services. Blockchain can also be used in the advertising industry by using user information effectively [ 31 ]. This will trigger a massive machine-to-machine (M2M) transactions. Telecommunication operators can take the initiative of using blockchain in this specific area and usher the next generation of digital services.

The demand for massive connectivity in 6G has triggered the network resource management such as power distribution, spectrum sharing, computational resources distribution as the main challenges [ 61 , 77 ]. Blockchain can provide solutions to the 6G network in these domains by managing the relationship between operators and users with the application of smart contracts. Similarly, blockchain can solve the unlicensed spectrum management and energy management problems. Blockchain can also be used in seamless environmental protection and monitoring, smart healthcare, cyber-crime rate reduction [ 80 , 81 ].

Tactile internet

With the evolution of mobile Internet, sharing of data, videos are enabled on mobile devices. The next stage is the evolution of IoTs, in which communication between smart devices is enabled. Tactile Internet is the next evolution of the Internet of networks, which integrated the real-time interaction of M2M and human-to-machine (H2M) communication by adding a new dimension of haptic sensations and tactile to this field. Tactile Internet is the term used for transmission of touch over a long distance. Some of the researchers termed it “Internet of Senses” [ 82 ].

ITU has termed the Tactile Internet as the Internet of networks with very high performance, ultra-low latency, high reliability, and high security. Tactile Internet will allow the human and the machines to communicate in the real-time with the environment in a certain range. Haptic interactions will be enabled through Tactile Internet.

Creating pressure against the skin without any physical object is one of the main challenges for Tactile Internet. One of the methods to produce such a sense of touch is by intense pressured sound waves. Ultrahaptics, a British company, is working on producing the haptic sensation by using ultrasounds [ 83 ]. The ultrasonic transducers can create a sense of touch by controlled production of ultrasonic waves by multiple transducers. These transducers integrated with in-depth cameras can detect the position of the body to react accordingly. Microsoft is also working on the development of haptic sensation using air vortex rings, which are resembling speaker diaphragm [ 84 ]. The concentrated waves from the tiny holes can move with a resolution of 4 inches and to the distance of 8.2 feet [ 85 ], which has a greater range and much less precise than the ultrasound system.

Free duplexing and spectrum sharing (FDSS)

In previous wireless generations, wireless systems were using either fixed duplexing (TDD/FDD) such as in the case of 1G, 2G, 3G, and 4G or flexible duplexing in the case of 5G [ 86 , 87 , 88 ]. Whereas, with the progress in the development of duplexing technologies, 6G is expected to use full free duplex in which all users are allowed to use complete resources simultaneously. Users can use all resources (i.e., space, time, and frequency) in a free duplex mode that eventually improves latency and throughput.

Presently, government bodies are monitoring the spectrum and allocating the spectrum to the operators. The owner of the spectrum has the full right to use that spectrum. Any other operator cannot use the spectrum allocated to some other operator. This is only due to the non-development of efficient spectrum monitoring or spectrum managing techniques at present. Therefore, as AI and blockchain are anticipated as key technologies in 6G, robust spectrum monitoring and spectrum management strategies are expected to be developed for the 6G roll-out. The network resources can be dynamically controlled by AI-aided 6G systems. Therefore, free spectrum sharing will become a reality in 6G.

In the context of free spectrum sharing techniques, NOMA is proposed to be a promising multiple access candidate for B5G/6G communication systems. In NOMA, a complete resource block (frequency band and time slot) is assigned to all users simultaneously, whereas the users are distributed in the power domain. The weakest user receives the maximum power from the BS, whereas the strong users apply the SIC to the composite NOMA signal to cancel out the messages of the weak users and finally extract their own messages. However, the number of SIC increases exponentially with the increase in the number of users, which increases the complexity of the NOMA system. User cooperation in NOMA can be used to alleviate outage problems of weak users and to provide diversity at the expense of more time slots. However, the number of SICs even becomes larger with the number of cooperating time slots. Space-time block coding-based NOMA (STBC-NOMA) is proposed as an alternative to reduce the number of time slots while keeping the same diversity order [ 89 ].

Apart from imperfect SIC, the imperfection in the channel state information (CSI) also affects the performance of NOMA systems. We present a comparative analysis of the impact of imperfect CSI on the performance of non-cooperative NOMA, conventional cooperative NOMA (CCN), STBC-aided cooperative NOMA, and conventional orthogonal multiple access (OMA) schemes in Fig.  7 . For a fair comparison between all schemes, we use the same total power budget for all of them. The channel from BS to the users and between users is considered as flat-fading Rayleigh channel. Fig. 7 a shows the average capacity of the weakest user vs. the total number of users for OMA, non-cooperative NOMA, STBC-NOMA [ 90 , 91 ], and conventional cooperative NOMA (CCN) [ 40 ] schemes with perfect CSI. Fig. 7 b and Fig. 7 c depict that with perfect channel state information (pCSI), CCN outperforms OMA, non-cooperative NOMA, and STBC-NOMA schemes. However, with the impairments of imperfect CSI (ipCSI), the performance of CCN is severely degraded, where the impact of ipCSI on the STBC-NOMA is much lesser than that of CCN. As shown in Fig. 7 c, with the ipCSI = -15 dBm, the STBC-NOMA outperforms the CCN scheme, whereas the impact of ipCSI on the OMA scheme is negligible. These schemes can be further explored in the future for providing massive connectivity with band-limited applications.

The average capacity vs. total number of users for OMA, non-cooperative NOMA, STBC-NOMA, and CCN with (a) pCSI (b) ipCSI = -30 dBm (c) ipCSI = -15 dBm

6G application

Modern society is influenced by intelligent and smart machines. These machines can communicate with each other and with human beings. They can be utilized to help human-being in various aspects of life ranging from medical/e-health, transport, food industry, agriculture, education, etc. In this section, we will introduce some of the important use cases of 6G that will utilize the ideas mentioned above.

E-health and digital/bio sensing

Recently, a widespread pandemic of coronaviruses, a class of viruses that cause sickness in human and animal species, has emerged as a serious threat to the health and life of mankind. The COVID-19 is linked to the family of Severe Acute Respiratory Syndrome (SARS) which affects the respiratory system of humans and animals [ 92 ]. With the growing number of COVID-19 infections, there is a requirement for the development of biosensors that are precise, accurate, sensitive, easy-to-use, and specific to detect and monitor infectious diseases. With the development of 6G, these biosensors can be integrated into the smartphones to give an early warning and control the pandemics [ 93 , 94 , 95 , 96 , 97 ].

With the integration of QC, ML, and biotechnology, 6G networks can be capable of effectively detecting viral diseases by observing the body temperature of infected individuals efficiently. Optical biosensors may also be used to track the pathological functioning of biorecognition substances, such as antibodies, enzymes, whole cells, and DNAzymes, to better detect multiple diseases [ 96 ]. In other areas of electronic health (e-health) such as control of environmental conditions (e.g., temperature, percentage of gases, and light condition), 6G can also be helpful. In various health operations such as emergency care, medical checkups, cleaning contaminated floors, and the supply of medication in rural areas, autonomous robotics can be used.

Holographic transmissions

Holography is a technique for capturing an object’s full 3D image. The methodology was suggested in 1947 by Gabor [ 98 ]. The term holography derives from the Greek words ‘Holo’ implies ‘complete’ and ‘graphic’ implies ‘writing’. An ordinary photograph records the picture’s two-dimensional image because it records only the distribution of amplitude or intensity. Therefore, in holography, both the intensity and the phase of light waves are recorded. Physical light effects such as interference, reflection, refraction, and diffraction were recorded in holography, and the archive is called the hologram  [ 99 ]. It is possible to play each hologram repeatedly. Although a hologram does not have an object resemblance, it has all the object information in optical forms. Just as mobile cameras have replaced still cameras, video calling and video recording, such as movies, will be replaced by holography.

Communication in space and deep sea

Space tourism has the immense potential for the next decade both in economic and scientific perspective [ 100 ]. Humans from every aspect of life will be traveling to space. Several firms are planning to launch sub-orbital commercial flights for space tourism. After some successful and profitable space launches, the next step will be to ensure the availability of space hotels and space hospitals for the customers [ 101 ]. Apart from commercial space flights, space research is another potential application [ 102 ].

6G will expand the range of activities throughout the globe with the availability of easy and effective tools of communication. Autonomous and intelligent robots will be placed in the harsh environmental areas for communication and research purposes [ 103 ]. The mysteries of the globe could be solved with the aid of the powerful and enormous capabilities of 6G networks. Deep-sea exploration such as oil exploration and mineral exploration can become a reality.

Robotics and automated vehicles for beyond industry 4.0 era

Industry 4.0 is the term used for the fourth industrial revolution [ 104 ]. Industry 4.0 factories have fully automated machines that can self-organize and self-optimize and include processes such as cloud computing, NFV, slicing, and industrial IoT. 6G will bring a new industrial revolution termed as beyond the Industrial 4.0 era.

Robots and fully automated vehicles will take part in the real-time diagnostics, operations, monitoring, and maintenance processes in a very efficient and cost-effective manner  [ 104 , 105 , 106 ]. Extremely high reliability and self-organizing feature of automation will come into all aspects of daily life. Swarms of UAVs, through advanced hardware, ML, and QML algorithms, will be used in various operations such as fire control, construction, emergency first response, and agriculture.

Key performance indicators (KPIs)

In this section, we discuss the main KPIs of 6G wireless systems. These KPIs include peak data rate, mobility requirements, connected devices per Km \(^2\) , area traffic capacity, latency, reliability, network spectral, and energy efficiency.

Peak data rate

One of the use cases for next-generation wireless communication is eMBB, which simply implies high data rates. Hence we can download HD videos in a few seconds. The data rate requirements of users are increasing since the birth of wireless communications. As shown in Fig.  4 , 1G had the data rates of a few kbps, which further increased to a few Gbps in 5G. These data rates are still not enough for some applications. Therefore, we require the development of some standard and communication protocols that have data rates in the range of 10-100Gbps [ 107 ].

More mobility robustness is also required in next-generation communication systems. High data rates should be maintained in highly mobile devices. For instance, if we are moving in the airplanes or high-speed bullet trains, the communication should not be disturbed, and data rates should be maintained. The mobility requirements for 6G, as defined by ITU, is >1000Km/hr [ 107 ].

Massive connectivity (devices/Km \(^2\) )

Another use case for next-generation wireless communication is mMTC. This is the domain where the IoTs comes in and is machine type communication without the interaction of human beings. The calls, messages, and commands are from machine to the other machine. The actions are not carried out by a human. Rather, it is the machines that are communicating with each other. Next-generation wireless networks technology is expected to accommodate \(10^7\) devices/Km \(^2\)  [ 108 ].

Sensor networks and IoTs will be connected to each other in a cooperative way and with several BS. Devices and applications in this category include wearable devices, control and monitoring devices, self-driving cars, smart grids, industrial automation and control devices, and medical and health-related devices. The communication between these devices may be through peer-to-peer or cooperative multi-hop relay manner.

Different applications or devices require different network infrastructure design which could manage different content-driven applications/network. Therefore, keeping all of these requirements in view, next-generation wireless networks would require a completely different approach for planning and optimization.

Area traffic capacity (Mbps/m \(^2\) )

With the increase in the number of connected devices per unit area, demand for the higher capacity channels and back-hauling also increased. A highly dense deployed sensor network produces more than tara bytes (TB) of data on daily basis  [ 107 ]. This data production needs a high capacity back-hauling channel to accommodate the traffic.

In the previous wireless generations (1G-to-5G), wireless protocols are designed for some specific applications. However, with the development of massive IoTs or mMTC, we need to have some power-efficient and cost-efficient devices to be designed. This massive IoTs communication leads to the development of vehicular communication such as autonomous driving termed as V2X (vehicle-to-infrastructure). The vehicle needs to interact with another vehicle, with pedestrians, and many other sensors installed in the vehicle. All these communication needs to be extremely reliable and with low latency and security. Industrial automation is another example where a lot of sensors are communicating and generating a huge amount of data. The minimum area traffic capacity limit for 6G is 1000Mbps/m \(^2\)  [ 107 ].

Extremely-high reliability and low latency with security (eRLLCS)

Low latency means quick and fast communication. We want our packets to be transmitted in a very short amount of time and there should not be much processing delays. The maximum allowable latency in 6G is 10 \(\mu\) sec [ 107 , 108 ]. The future network of intelligent mobiles and robots will require high reliability and ultra-low latency. Future cities will comprise of smart homes, smart cars, smart industries, smart schools/universities, and smart industries. Smart cities will need to be connected to airplanes, ships, bullet trains, and UAVs. Some of the critical applications which include health care, defense sector, monitoring, and surveillance will require ultra-reliability and low delay.

Online gaming services demand high reliability and low latency. The eRLLCS in 6G wireless systems will integrate the security features with mMTC and URLLC in 5G with greater requirements of reliability of higher than 99.9999999 \(\%\) (Nine 9’s)  [ 107 ]. Autonomous vehicles will be connected to each other and the communication between them should be ultra-reliable, otherwise it may lead to the loss of lives in accidents. In 6G systems, a lot of households and other sensors will be communicating with each other also require ultra-reliability to prevent any mishap to occur.

A QoS-aware spectral efficient network

The future intelligent wireless network will comprise of intelligent/smart factories, intelligent/smart hospitals, schools, universities, and autonomous robots. This will require a highly spectral efficient network having high computing power. A high-density and high-rate network will require high bandwidth. The scarcity of the bandwidth will increase with the increase of data in the network. For reliable communication, an ultra-spectral efficient network would therefore be needed while at the same time satisfying the criteria for QoS of all users in next-generation wireless networks, which will be smart enough to move to a new state with changing environmental conditions.

With the increasing number of mobile devices and communication types, the scarcity of the radio wireless spectrum has increased. Therefore, some communication protocols are needed to be designed for spectral efficient communication. So that the bandwidth resource is effectively utilized. The spectral efficiency of 6G networks is supposed to be >15 times that of 3G [ 107 ].

Energy efficient network

The next-generation wireless communication system will consist of massive self-organizing and self-healing robots. All these intelligent robots/devices will require high computation power. Therefore, the need for energy will be increasing with the increase in intelligent robots. Currently, traditional GPUs are not meeting the energy efficiency requirements of next-generation wireless networks communication networks. In such a scenario, an energy-efficient and scalable intelligent network design will be required. The industry has moved towards IoTs, IoEV and IoBTs [ 107 , 109 ]. We have sensors deployed everywhere. There is a sensor in our door, in our air conditioner, in our car, on the TV, in the refrigerator, in offices. All these sensors need energy-efficient communication.

Table  1 gives a critical analysis of the potential 6G technologies, which will enable communications in the B5G/6G era. Advantages and disadvantages along with the research initiative in these technologies are also described.

Research challenges and directions

In this section, We discuss some of the main research problems and directions for the deployment of B5G/6G networks.

Hardware complexity and increase in chip size

Next-generation mobile communication will integrate multiple communication devices ranging from sensors to HD video transmission devices or communication with high-speed trains and airplanes. Such devices will require variable packet sizes to be transmitted, contrary to the previous mobile communication technologies with fixed packet size.

With the variable packet size to be transmitted, the hardware complexity is increased. Since the frame/packet size is not known to the mobile station a priori, it must select its signal processing and RF chains according to the incoming packet, which means that the chip size will be increasing, which will ultimately increase the mobile size. This will again increase the processing time which is not desirable in next-generation wireless communication.

6G communication network will cover a large bandwidth ranging from 3GHz to 60GHz. Therefore, to enable communication, at any frequency in this band, the complexity of the hardware circuitry is increased. For each, the communication, antenna, RF filters, amplifiers have to be designed accordingly. To cover all the band in next-generation communication systems, multiple RF and signal processing chains would be required, which would ultimately increase the chip size and hardware. Therefore, a lot of focus needs to be paid to the field of open research.

Variable radio resource allocation

With variable QoS requirements, a variable radio resource has to be assigned to the user. This may be variable bandwidth, power, or both. Another challenging aspect of 6G is that with propagation frequency, the signal can attenuate rapidly and have high penetration loss at high frequencies. The signal is also automatically attenuated upon accessing houses, residences, or workplaces. With the increasing frequency, as the radio waves get attenuated, it could have trouble penetrating walls in buildings and houses, while affecting the QoS requirements of the users. It is therefore of great significance to develop stable, fast, precise algorithms to manage the 6G communication requirements by dynamically allocating variable resources.

Ultra-low power circuits with high-performance processing capabilities

To cope with latency-critical scenarios such as automated cars and medical/health applications, the communication needs to be accomplished in a very short duration of time. To attain the latency of only a few milliseconds is quite challenging. To achieve low latency and ultra-high reliability, it is essential to develop powerful high-end processors that consume low power.

Pre-emptive Scheduling in Massive Connectivity

In the wireless communication, a network node assigns the radio resources to other nodes as per their priorities [ 111 ]. However, in the case of 6G wireless networks, where a massive number of devices will be connected to each other, setting the priority level for all these devices and maintaining the latency and packet loss requirements of 6G will be quite challenging. In order to carry out such pre-empted communication on the 6G wireless network, which is another open research field, some appropriate algorithms would be required.

Seamless coexistence of multiple RATs

With multiple interfaces, 6G can incorporate multiple RATs. This ensures that 6G will coexist with and interoperate with other technologies, such as Wi-Fi, Bluetooth, networks of ad hoc sensors, and IoTs, etc. For the change in the user’s radio environment, the air interface can dynamically change. It is still an open challenge to develop scalable techniques that guarantee interoperability while meeting the KPI requirements of 6G.

Security and privacy

In the last few years, the number of IoT devices has grown exponentially. These devices include personal IoT, health care IoT, and industrial IoT, which are connected to form a mesh network. 6G is expected to be an enabler for large-scale cyber operations including IoT applications. As IoT devices are connected to the internet, broad-scale distributed denial of service (DDoS) attacks could be more common. This large-scale DDoS attack will serve as an enabler in a 6G IoT system that can lead to security, privacy, and trust issues in the network. This is therefore an open research challenge for 6G networks, too.

Technology has a great impact on the lifestyle of human beings. Wireless technologies have revolutionized businesses, living standards, infrastructure, and many other aspects of human life. Mankind is in a constant struggle to find elegant solutions to various problems and is in search of new avenues to progress. This desire of mankind has evolved wireless communication from 1G to 5G. However, this development has not stopped here. The researchers around the world are working hard for the development of 6G communication network, which is expected to be rolled out by 2030.

In this paper, we covered various aspects of 6G wireless networks with different perspectives. We provided a vision for B5G/6G communications, 6G network architecture, KPI requirements, key enabling technologies, their use-cases, and network dimensions that will landmark the next generation communication systems. Furthermore, a way out is discussed how these potential technologies will meet the KPI requirements for these systems. Finally, the opportunities and research challenges such as hardware complexity, variable radio resource allocation, pre-emptive scheduling, power efficiency, the coexistence of multiple RATs, and security, privacy and trust issues for these technologies on the way to the commercialization of next-generation communication networks are presented.

Availability of data and materials

Not applicable.

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Acknowledgements

This work was supported in part by the Researchers Supporting Project number (RSP-2020/32), King Saud University, Riyadh, Saudi Arabia and in part by the Incheon National University Research Grant in 2020.

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Akhtar, M.W., Hassan, S.A., Ghaffar, R. et al. The shift to 6G communications: vision and requirements. Hum. Cent. Comput. Inf. Sci. 10 , 53 (2020). https://doi.org/10.1186/s13673-020-00258-2

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What is 6G? The next generation of wireless technology explained

Industry leaders and researchers are ramping up efforts to hasten its development.

Technology Innovation Institute researcher Merouane Debbah addresses the inaugural Abu Dhabi 6G Summit on Thursday. Victor Besa / The National

Sixth-generation wireless technology (6G) will not come anytime soon but industry leaders and researchers are intensifying efforts to hasten its development, experts said.

Artificial intelligence will be “at the heart” of 6G, Merouane Debbah, chief researcher for AI and telecom systems at Abu Dhabi's Technology Innovation Institute (TII), told The National at the inaugural Abu Dhabi 6G Summit on Thursday.

This will lead to new ways of communicating, including through holographic means and 3D coverage, he said.

“It is a long process. At the moment, we have people at research centres developing the technologies that will fulfil the key performance indicators [KPIs] of 6G,” Mr Debbah said.

“We want to build an infrastructure that connects intelligence.”

What is 6G?

This is the next generation of wireless communications, which promises even faster speeds and efficiency compared with 5G, the current iteration.

When will 6G be available?

If history is to be a reference, new generations of wireless technology emerge with every new decade — which means 6G would become available in the early 2030s. This is a widely shared industry expectation.

The US has historically introduced new wireless technology iterations, with the third generation released in 2002, the fourth in 2010 and 5G in 2018. The second and first generations were in the 1980s and early 1990s, respectively, with the so-called “zero G” existing before that.

What is the timeframe for 6G's release?

Research on 6G technology began in 2020, which marked the start of a long and intensive process, Mr Debbah said.

By 2024, the standardisation process would begin, which will be kicked off by trials to ensure the technology works “in the right configuration” — a process that is expected to continue until 2026.

Once tested, researchers will select the technology that responds to the established key performance indicators and then proceed to the next phase, which includes identifying the frequencies to be used by about 2027.

This period would last until 2028 or 2029, before 6G networks are put in place by 2030, hopefully.

What is the biggest challenge to 6G?

Apart from the tedious development and standardisation process, the most important aspect is to get all organisations involved and then agree upon the standards in order to move forward quickly, if the deadlines are to be met.

“Whenever there are different stakeholders, like manufacturers and phone makers , they need to know how to talk to each other. You need to be sure that everybody agrees,” Mr Debbah said.

Energy consumption is also a challenge. The industry is looking for more ways to make 6G technology more sustainable, in line with Cop climate summit goals .

There is also the concern of “connecting the unconnected”, which entails bringing network cover to most, if not all, parts of the world — especially in “dead spots” such as deserts — to ensure no one is left out when it comes to communication.

How fast will 6G be, compared with 5G?

The current technology, 5G, is already fast. However, 6G allows movies with 8K video resolution to be downloaded at speeds that are up to 500 times faster than what 5G offers.

Also, 6G is expected to enhance the capability of today's 5G networks by 100 times, Mr Debbah said.

Latency, the delay between sending and receiving information, will be reduced by a factor of 10 to 0.1 millisecond while the energy efficiency of networks will drop by a factor of 100, he said.

“It will be massive connectivity than what it is today — about 10 million connected objects per square kilometre,” said Mr Debbah.

What would be 6G's enabling technology?

As with every new standard, technology would either be improved or introduced.

With 6G, the Internet of Space Things, pervasive AI, network automation and terahertz communication bands that would satisfy the demand for faster speeds are expected to be its key enablers, according to research by TII, which is based in Abu Dhabi.

Pervasive AI is the process of machines learning from experiences.

At present, the most interesting yet unexpected driver is the metaverse , which emerged last year.

This is largely due to it being heavily promoted by Meta Platforms, the parent company of social media platform Facebook.

“The big picture is really a gigantic world,” said Ian Akyildiz, an advisory board member at TII, who also noted the big business opportunities that the metaverse presents — up to $394 billion by 2025, he said.

The metaverse presents an enormous economic opportunity worth between $8 trillion and $13tn, a PwC report said in July.

“It is an incredible opportunity from all perspectives — software, hardware, more applications and platforms — and maybe it will be much more,” Mr Akyildiz said.

Dubai holds world's first metaverse assembly

Is it too early to talk about 7G?

It is. However, TII research provides some clues into what we can expect from a technology that would presumably come in 2040.

Among 7G's key enabling technology applications would be quantum communications, which uses quantum physics and cryptography — or the use of codes — to protect data, and the Internet of NanoThings/BioNano Things, which senses biological signals from the environment and sends them to data centres for processing on the internet.

All these sound so futuristic but with the current pace of technology, it won't be a surprise if we arrive at these sooner than later.

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6G, the sixth generation of wireless communication, is the successor to the current 5G technology. While 5G has brought us unprecedented speeds and low latency, 6G aims to take it to the next level. It promises to be faster, more reliable, and capable of connecting an even larger number of devices simultaneously.<br><br>

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TECHVENTURE UNDERSTANDING 6G TECHNOLOGY: TECHNOLOGY AWARENESS WWW.TECHVENTURE.US

WHAT IS 6G? 6G, the sixth generation of wireless communication, is the successor to the current 5G technology. While 5G has brought us unprecedented speeds and low latency, 6G aims to take it to the next level. It promises to be faster, more reliable, and capable of connecting an even larger number of devices simultaneously.

KEY FEATURES AND CAPABILITIES 01 ULTRA-LOW LATENCY 02 BLISTERING SPEEDS: 03 • MASSIVE DEVICE CONNECTIVIT 04 • ADVANCED SPECTRUM AND TERAHERTZ FREQUENCIES 05 • INTELLIGENT AND SELF-ORGANIZING NETWORKS

APPLICATIONS AND IMPLICATIONS 01 AUGMENTED AND VIRTUAL REALITY 02 SMART CITIES AND INFRASTRUCTURE 03 • ENVIRONMENTAL MONITORING 04 • AUTONOMOUS SYSTEMS 05 • ADVANCED INDUSTRIAL AUTOMATION

CONCLUSION 6G is set to revolutionize wireless communication and usher in a new trending technology of connectivity. With its blistering speeds, ultra-low latency, massive device connectivity, and intelligent network management capabilities, 6G will enable groundbreaking applications across various sectors.

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6G mid-band spectrum technology explained

12 March 2024

Research into 6G started in the 2018 time frame. It is projected that the first 3GPP 6G specification will be completed by 2028, to be followed by commercial 6G deployment and completion of the IMT-2030 specification by the end of 2029. Closer to hand, this coming May, the first 3GPP SA1 6G use cases and requirements workshop will be held. The goal is to gather the 6G use cases of the different global and regional research organizations for presentation to the 3GPP SA1 community. 

One of the latest accomplishments on the road to 6G, occurred at the recently concluded WRC-23 conference, held in Dubai, which, among other topics, addressed mid-band specturm and identified the upper 6 GHz band (6.425-7.125 GHz) for IMT (International Mobile Telecommunications) in Europe, Middle East and Africa, as well as in some countries in the Americas and Asia. The conference also agreed on a new IMT/6G study item for WRC-27 including new frequency bands in the 7-15 GHz range. This article discusses the WRC-23 outcomes in mid-bands[1], requirements on EIRP (equivalent isotropic radiated power), EMF (electromagnetic fields) exposure limits, and the impact on coverage and capacity.   

Mid-band spectrum overview

The figure below shows the WRC-23 outcomes which sets a favorable foundation for 6G success.

The following can be observed from the figure:

The identification of the 6.425–7.125 GHz (upper 6 GHz) band for IMT enables realization of 5G and 5G-Advanced and paves the way for 6G in many markets. Besides IMT identification in Europe, Middle East and Africa, this band is also identified in Mexico and Brazil, while it remains a WiFi-only band in the US and Canada. In Asia, only a few countries identify the full band for IMT, but the top 100 MHz is identified across the whole Asian region, with China, India and Japan planning to use it.

New spectrum ranges: 4.400–4.800 GHz, 7.125–8.400 GHz and 14.800–15.350 GHz are potentially available for 6G, subject to further study in the WRC-27 cycle.

There is also a US spectrum pipeline outside the WRC process concerning the lower 3 GHz band (3.100–3.450 GHz), which is being considered for shared use with military radar, and the 12.7 GHz band (12.700–13.250 GHz), which will be exclusively used for licensed mobile broadband.

In summary, there is up to 700 MHz of spectrum in the upper 6GHz band and potentially more than 2 GHz of spectrum for exclusive and/or shared use in the 7–15 GHz range which also includes 12.700-13.250 GHz band in US which is outside the WRC process.  

Technical challenges and solutions in mid-band frequencies

It is well known that propagation and penetration loss increase with frequency. For example, the difference in free space pathloss from 3.5 GHz to 7 GHz is 6dB, whereas it is 11.4dB from 3.5 GHz to 13 GHz. Similarly, penetration loss increases by 4.5dB from 3.5 to 7 GHz, versus 6.6dB from 3.5 to 13 GHz (see 3GPP TR 38.901). To compensate these losses and keep using the same macro-grid as C-band, one has to increase the EIRP and use larger antenna arrays while keeping the EMF exposure within safe limits. One also has to address co-existence with incumbents like satellites in the upper 6 GHz band and various federal allocations like space research, fixed and mobile satellites, as well as meteorological and earth exploration satellites in the 7.125–8.400 GHz range. 

In the upper 6 GHz band, regulatory conditions for coexistence with satellites (WRC-23) are not overly restrictive but lead to achievable EIRP towards users — similar to the C-band — which results in reduced capacity and coverage compared to the 3.45 and 3.7 GHz bands. In the 12.700–13.250 GHz band, we have proposed to the FCC (US Federal Communications Commission) [2, 3] an EIRP limit of 85dBm/100 MHz with due consideration for EMF exposure limits. We understand that the same EIRP limit should be considered for the 7–15 GHz range to comply with the EMF exposure limits, while still achieving a decent cell edge and average user performance with large antenna arrays.

System performance

The table below compares cell edge spectral efficiency (bps/Hz) performance of a network operating at 7 GHz and 13 GHz versus 3.5 GHz for various inter-site distances and full buffer traffic. The benchmark system assumes 100 MHz of bandwidth at 3.5 GHz with 64TRX and 256 antenna elements. We assume extreme MIMO with 1024 antenna elements and 256TRX for both 7 GHz and 13 GHz using 200 MHz of bandwidth.

The table shows that a 7 GHz deployment can reuse the macro grid with 500m ISD (inter-site distance) and achieve comparable performance to the 3.5 GHz system with a maximum EIRP limit of 85dBm/100 MHz. A standalone 13 GHz system, however, shows inferior performance if using the 500m macro-grid using standard beamforming techniques. For example, the C-band benchmark system uses 100 MHz bandwidth at 3.5 GHz (4RX, OMNI) and TDD duty cycle of 60%, and achieves cell edge throughput around 16 Mbps (Cell Edge SE 0.26bps/Hz) with 350m ISD. By comparison, the cell edge throughput at 7 GHz using 200 MHz bandwidth is 63 Mbps (Cell Edge SE of 0.32 bps/Hz), while at 13 GHz, it is 19 Mbps (Cell Edge SE 0.16 bps/Hz). In other words, the wider bandwidth, higher EIRP and larger arrays provide higher (7 GHz) or comparable (13 GHz) absolute throughput at mid-bands relative to the C-band. Further, the mid-band performance numbers in the table can be further improved over 3.5 GHz (C-band) using advanced beamforming techniques. 

It may be noted that UL (uplink) coverage at mid-bands is also challenging. Indoor handheld devices with 8RX antennas at 7 GHz can have better coverage than C-band with 4RX, but insufficient coverage at 13 GHz. UL carrier aggregation of a sub-3 GHz carrier with mid-band is one solution, especially if combined with UL power control parameter tuning.

The Golden Bands and the future of 6G

WRC 2023 will decide the fate of 6G

6G explained

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6 Takeaways From Nvidia CEO Jensen Huang's GPU Tech Conference Keynote

AI Chip Leader Made Flurry of Product and Partnership Announcements

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Nvidia ( NVDA ) founder and chief executive officer Jensen Huang kicked off the company's annual  GPU  technology conference (GTC) Monday with a keynote address unveiling the Blackwell platform, announcing expanding partnerships with industry leaders, and showcasing the tech's capabilities.

The Nvidia event, which runs through Thursday, has been eagerly anticipated by investors who are keen to learn about the chipmaker's artificial intelligence initiatives and partnerships. Nvidia stock has risen more than 80% since the start of the year amid optimism about the company's AI-fueled growth prospects .

Here are some of the key takeaways from Huang's presentation and announcements made by the company on the first day of the event.

Unveiling Blackwell, the 'World's Most Powerful Chip'

Nvidia announced the Blackwell platform the latest version of its AI-powering technology. The Blackwell GPU is the "world's most powerful chip," that will power "a new era of computing," the company said.

The new system is more capable and efficient than its predecessor, Hopper.

"The inference capability of Blackwell is off the charts and in fact it is some 30 times Hopper," Huang said in his keynote address.

The Blackwell architecture can run a generative AI large language model consuming around 25 times less cost and energy as Hopper, Nvidia said in a release.

Nvidia also unveiled the GB200 Grace Blackwell Superchip, a "massive super chip" that "connects two NVIDIA B200 Tensor Core GPUs to the NVIDIA Grace CPU."

The company said that "GB200 will also be available on NVIDIA DGX™ Cloud, an AI platform co-engineered with leading cloud service providers that gives enterprise developers dedicated access to the infrastructure and software needed to build and deploy advanced generative AI models."

Nvidia reported that many companies leading AI are already set to use the Blackwell system, ahead of its official launch.

Amazon ( AMZN ), Microsoft ( MSFT ), and Alphabet's Google ( GOOGL ) are among the partners set to use Blackwell.

Nvidia said that Blackwell products will be available through its partners later this year.

Nvidia's Omniverse Meets Apple's VisionPro

Nvidia announced that it is bringing Omniverse to Apple's ( AAPL ) recently launched VisionPro virtual reality headset.

The Omniverse is Nvidia's "computing platform that enables individuals and teams to develop 3D workflows and applications." Huang opened his keynote with a demonstration of Omniverse simulations.

Developers can "easily send their Universal Scene Description (OpenUSD) industrial scenes from their content creation applications to the NVIDIA Graphics Delivery Network (GDN), a global network of graphics-ready data centers that can stream advanced 3D experiences to Apple Vision Pro," Nvidia said.

Nvidia announced "Project GR00T," a foundation model for humanoid robots, which Huang said is the "next wave" of AI and robotics.

"Building foundation models for general humanoid robots is one of the most exciting problems to solve in AI today," Huang said, adding that "the enabling technologies are coming together for leading roboticists around the world to take giant leaps towards artificial general robotics.”

The company said that the "robots powered by GR00T, which stands for Generalist Robot 00 Technology, will be designed to understand natural language and emulate movements by observing human actions."

Nvidia also unveiled "Jetson Thor," a new computer for humanoid robots that includes GenAI capabilities as part of its AI-powered robotics initiative.

Blueprint for 'Next Gen' Data Centers

Nvidia showed a 3D blueprint for "next-gen" data centers in the AI era.

The design was created using Omniverse to simulate "modern data centers," which are "incredibly complex, involving multiple considerations like performance, energy efficiency and scalability," the company said.

"In the future, data centers are going to be thought of, as I mentioned earlier, as an AI factory," Huang said, adding that the goal of an AI factory is the "generation of intelligence."

Nvidia's latest offerings are expected to supercharge data centers. Microsoft CEO Satya Nadella said in a release that "by bringing the GB200 Grace Blackwell processor" to Microsoft datacenters globally, [the company is] building on [its] long-standing history of optimizing NVIDIA GPUs for our cloud, as we make the promise of AI real for organizations everywhere.”

Nvidia announced that it is expanding its collaboration with Oracle ( ORCL ) to help deliver sovereign AI globally.

Sovereign AI "refers to a nation’s capabilities to produce artificial intelligence using its own infrastructure, data, workforce and business networks," Nvidia explained.

The Nvidia and Oracle partnership to meant to "deliver sovereign AI solutions to customers around the world" as "Oracle’s distributed cloud, AI infrastructure, and generative AI services, combined with NVIDIA’s accelerated computing and generative AI software, are enabling governments and enterprises to deploy AI factories."

“As AI reshapes business, industry, and policy around the world, countries and organizations need to strengthen their digital sovereignty in order to protect their most valuable data,” Oracle CEO Safra Catz said said in a release.

Nvidia announced a a 6G research platform that offers "researchers a comprehensive suite to advance AI for radio access network (RAN) technology."

"The platform allows organizations to accelerate the development of 6G technologies that will connect trillions of devices with the cloud infrastructures, laying the foundation for a hyper-intelligent world supported by autonomous vehicles, smart spaces and a wide range of extended reality and immersive education experiences and collaborative robots," the company said in a release.

Nvidia said the platform will empower the "the next phase of wireless technology" and could meet the growing demand presented by running AI on wireless devices.

Nvidia shares, which had gained 0.7% during regular trading hours Monday, fell 1.8% to $868.90 in extended trading.

Nvidia. " 'We Created a Processor for the Generative AI Era,' NVIDIA CEO Says ."

Nvidia. " NVIDIA Blackwell Platform Arrives to Power a New Era of Computing ."

Nvidia. " NVIDIA Omniverse Expands Worlds Using Apple Vision Pro ."

Nvidia. " NVIDIA Omniverse ."

Nvidia. " NVIDIA Announces Project GR00T Foundation Model for Humanoid Robots and Major Isaac Robotics Platform Update ."

Nvidia. " NVIDIA Unveils Digital Blueprint for Building Next-Gen Data Centers ."

Nvidia. " What Is Sovereign AI? ."

Nvidia. " NVIDIA Unveils 6G Research Cloud Platform to Advance Wireless Communications With AI ."

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Samsung Electronics Unfolds the Next Generation Communications Technology at the First Samsung 6G Forum

The samsung 6g forum, an opportunity to find out what to expect from the 6g technology and how it will turn out.

Samsung Electronics announced that the company hosts its first-ever Samsung 6G Forum (S6GF) online today.

Under the theme of ‘The Next Hyper-Connected Experience for All.’, the forum is divided into two sessions and broadcasts live online via  Samsung’s YouTube channel . Each session consists of talks by experts from academia and industry specializing in next-generation communications technologies, followed by a panel discussion.

“We envision that 6G will provide ultimate experiences for humans and everything through the next level of hyper-connectivity, and this idea serves as the foundation of our 6G vision,” said Sebastian Seung, President and Head of Samsung Research. 1  “We believe that it is the right time to start preparing for 6G. Shaping 6G will require many years, as we have seen with previous generations, and will need lots of discussion and collaborations among players in industry and academia.”

Morning Session — 6G Air Interface 

The morning session is held under the theme, ‘6G Air Interface’. In this session, Jeffrey Andrews, Professor at the University of Texas at Austin gives a keynote speech, titled ‘Deep Learning in the 6G Air Interface’, highlighting that deep learning (DL) will be a key technology enabling 6G, which can provide important advances at many layers of the air interface.

Following the keynote speech, Charlie Zhang, Senior Vice President (SVP) at Samsung Research America, Takehiro Nakamura, SVP and General Manager at NTT DOCOMO and John Smee, SVP of Qualcomm Technologies, Inc. give in-depth expert talks.

SVP Charlie Zhang of Samsung Research America makes a presentation on ‘Radio Technology Evolution for Beyond 5G and 6G’. He presents that while 6G technologies are still in their early days, a few emerging directions are taking shape and gaining momentum in academia and industry alike, including the support of a new spectrum such as upper mid-band in the range of 7-24 GHz and Terahertz (THz) band, novel antenna technologies, the evolution of duplex technology and network topology, spectrum sharing, Artificial Intelligence (AI) as a native part of the protocol design, etc.

SVP Takehiro Nakamura of NTT DOCOMO talks on ‘5G Evolution and 6G’, highlighting the research focused on technologies and services for 5G evolution and 6G is accelerating throughout the world. SVP John Smee of Qualcomm Technologies, Inc. talks about ‘Driving Air Interface Innovation Toward 6G’, emphasizing the advanced wireless research and development along multiple vectors that will bring disruptive innovations and push technology boundaries to enable new and enhanced user experiences with 6G.

Following the presentations, Juho Lee, Fellow at Samsung Research, leads a panel discussion on 6G RAN technology. Afterward, Sunghyun Choi, Executive Vice President (EVP) and Head of Advanced Communications Research Center at Samsung Research, shares Samsung’s progress in 6G research along with demo videos.

Afternoon Session — Intelligent Network for 6G

The afternoon session goes under the theme, ‘Intelligent Network for 6G’. Tarik Taleb, Professor at University of Oulu, Finland, starts off with a keynote speech regarding ‘6G Networking — The Journey Towards a Novel Vision of “Service of Services”’. He highlights that AI, Network Function Virtualization, Software-Defined Networking and Edge/Cloud computing brought significant benefits in terms of reducing expenditure and operational costs, flexibility in deployment and faster time to market, and mentions that 6G will likely enable a new breeze of cloud-native mobile networking.

Following the keynote speech, Seungjoo Maeng, Master at Samsung Electronics, Byonghyo Shim, Professor at Seoul National University and Shi Jin, Professor at Southeast University, China deliver in-depth expert talks.

Master Seungjoo Maeng of Samsung Electronics talks about ‘Challenges in Applying AI/ML Technology to Improve Performance of Mobile Communication Systems’, highlighting the challenges in applying AI and ML (Machine Learning) to improve the performance of wireless mobile communication systems and how to solve them.

Professor Byonghyo Shim of Seoul National University gives a talk on ‘Deep Learning-Aided Mobile Detection and Beamforming for mmWave and THz Communications’, presenting the new paradigm to control mmWave and THz communications based on DL. Professor Shi Jin of Southeast University, China introduces ‘Deep Learning-based CSI Feedback in Massive MIMO Systems’, discussing challenges and potential research directions associated with implementing DL-based CSI (channel state information) feedback in future wireless communication systems.

After these presentations, EVP Sunghyun Choi of Samsung Research leads a panel discussion on network AI.

For more information on ‘Samsung Tech Forum’, please visit Samsung Research website at  research.samsung.com .

1 Samsung Research, acting as Samsung Electronics’ advanced R&D hub, leads the development of future technologies for the company’s DX (Device eXperience) Division.

TAGS 6G AI Into the Future Samsung 6G Forum Samsung Research

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• [Samsung 6G Forum] Preparing for the Future of Next-Generation Communications Technologies : A Virtual Roundtable With Samsung Research’s 6G Leaders
• Samsung Electronics Hosts Its First-Ever 6G Forum To Explore the Next-Gen Communications Technologies
• Samsung Electronics and University of California Santa Barbara Demonstrate 6G Terahertz Wireless Communication Prototype
• Samsung’s 6G White Paper Lays Out the Company’s Vision for the Next Generation of Communications Technology
• [What’s Next in Communications Technology?] ① Paving the Way for a New World of Experiences

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Press Release Details

Nvidia unveils 6g research cloud platform to advance wireless communications with ai.

SAN JOSE, Calif., March 18, 2024 (GLOBE NEWSWIRE) -- GTC -- NVIDIA today announced a 6G research platform that empowers researchers with a novel approach to develop the next phase of wireless technology.

The NVIDIA 6G Research Cloud platform is open, flexible and interconnected, offering researchers a comprehensive suite to advance AI for radio access network (RAN) technology. The platform allows organizations to accelerate the development of 6G technologies that will connect trillions of devices with the cloud infrastructures, laying the foundation for a hyper-intelligent world supported by autonomous vehicles, smart spaces and a wide range of extended reality and immersive education experiences and collaborative robots.

Ansys, Arm, ETH Zurich, Fujitsu, Keysight, Nokia, Northeastern University, Rohde & Schwarz, Samsung, SoftBank Corp. and Viavi are among its first adopters and ecosystem partners.

“The massive increase in connected devices and host of new applications in 6G will require a vast leap in wireless spectral efficiency in radio communications,” said Ronnie Vasishta, senior vice president of telecom at NVIDIA. “Key to achieving this will be the use of AI, a software-defined, full-RAN reference stack and next-generation digital twin technology.”

The NVIDIA 6G Research Cloud platform consists of three foundational elements:

• NVIDIA Aerial Omniverse Digital Twin for 6G : A reference application and developer sample that enables physically accurate simulations of complete 6G systems, from a single tower to city scale. It incorporates software-defined RAN and user-equipment simulators, along with realistic terrain and object properties. Using the Omniverse Aerial Digital Twin, researchers will be able to simulate and build base-station algorithms based on site-specific data and to train models in real time to improve transmission efficiency.
• NVIDIA Aerial CUDA-Accelerated RAN : A software-defined, full-RAN stack that offers significant flexibility for researchers to customize, program and test 6G networks in real time.
• NVIDIA Sionna Neural Radio Framework : A framework that provides seamless integration with popular frameworks like PyTorch and TensorFlow, leveraging NVIDIA GPUs for generating and capturing data and training AI and machine learning models at scale. This also includes NVIDIA Sionna, the leading link-level research tool for AI/ML-based wireless simulations.

Industry-leading researchers can use all elements of the 6G development research cloud platform to advance their work.

“The future convergence of 6G and AI holds the promise of a transformative technological landscape,” said Charlie Zang, senior vice president of Samsung Research America. “This will bring seamless connectivity and intelligent systems that will redefine our interactions with the digital world, ushering in an era of unparalleled innovation and connectivity.”

Testing and simulation will play an essential role in developing the next generation of wireless technology. Leading providers in this space are working with NVIDIA to contribute to the new requirements of AI with 6G.

“Ansys is committed to advancing the mission of the 6G Research Cloud by seamlessly integrating the cutting-edge Ansys Perceive EM solver into the Omniverse ecosystem ,” said Shawn Carpenter, program director of 5G/6G and space at Ansys. “Perceive EM revolutionizes the creation of digital twins for 6G systems. Undoubtedly, the convergence of NVIDIA and Ansys technologies will pave the way toward AI-enabled 6G communication systems.”

“Access to wireless-specific design tools is limited yet needed to build robust AI,” said Kailash Narayanan, president and general manager of Keysight Communications Solutions Group. “Keysight is pleased to bring its wireless network expertise to enable the next generation of innovation in 6G communications networks.”

The NVIDIA 6G Research Cloud platform combines these powerful foundational tools to let telcos unlock the full potential of 6G and pave the way for the future of wireless technology. To access the platform, researchers can sign up for the NVIDIA 6G Developer Program .

About NVIDIA Since its founding in 1993, NVIDIA (NASDAQ: NVDA) has been a pioneer in accelerated computing. The company’s invention of the GPU in 1999 sparked the growth of the PC gaming market, redefined computer graphics, ignited the era of modern AI and is fueling industrial digitalization across markets. NVIDIA is now a full-stack computing infrastructure company with data-center-scale offerings that are reshaping industry. More information at https://nvidianews.nvidia.com/ .

For further information, contact: Janette Ciborowski NVIDIA Corporation +1-734-330-8817 [email protected]

Certain statements in this press release including, but not limited to, statements as to: the benefits, impact, performance, features, and availability of NVIDIA’s products and technologies, including NVIDIA 6G Research Cloud platform, NVIDIA Aerial Omniverse Digital Twin for 6G, NVIDIA Aerial CUDA-Accelerated RAN, NVIDIA Sionna Neural Radio Framework, and NVIDIA GPUs; third parties’ use or adoption of NVIDIA products, technologies and platforms, and the benefits and impacts thereof; the massive increase in connected devices and host of new applications in 6G requiring a vast leap in wireless spectral efficiency, and the key to achieving it being the use of AI, a software-defined, full-RAN reference stack and next-generation digital twin technology in radio communications; and the future convergence of 6G and AI holding the promise of a transformative technological landscape, bringing seamless connectivity and intelligent systems that will redefine our interactions with the digital world, ushering in an era of unparalleled innovation and connectivity are forward-looking statements that are subject to risks and uncertainties that could cause results to be materially different than expectations. Important factors that could cause actual results to differ materially include: global economic conditions; our reliance on third parties to manufacture, assemble, package and test our products; the impact of technological development and competition; development of new products and technologies or enhancements to our existing product and technologies; market acceptance of our products or our partners' products; design, manufacturing or software defects; changes in consumer preferences or demands; changes in industry standards and interfaces; unexpected loss of performance of our products or technologies when integrated into systems; as well as other factors detailed from time to time in the most recent reports NVIDIA files with the Securities and Exchange Commission, or SEC, including, but not limited to, its annual report on Form 10-K and quarterly reports on Form 10-Q. Copies of reports filed with the SEC are posted on the company's website and are available from NVIDIA without charge. These forward-looking statements are not guarantees of future performance and speak only as of the date hereof, and, except as required by law, NVIDIA disclaims any obligation to update these forward-looking statements to reflect future events or circumstances.

Many of the products and features described herein remain in various stages and will be offered on a when-and-if-available basis. The statements above are not intended to be, and should not be interpreted as a commitment, promise, or legal obligation, and the development, release, and timing of any features or functionalities described for our products is subject to change and remains at the sole discretion of NVIDIA. NVIDIA will have no liability for failure to deliver or delay in the delivery of any of the products, features or functions set forth herein.

© 2024 NVIDIA Corporation. All rights reserved. NVIDIA and the NVIDIA logo are trademarks and/or registered trademarks of NVIDIA Corporation in the U.S. and other countries. Other company and product names may be trademarks of the respective companies with which they are associated. Features, pricing, availability, and specifications are subject to change without notice.

A photo accompanying this announcement is available at https://www.globenewswire.com/NewsRoom/AttachmentNg/44b10c44-43db-45ff-81fd-86571b506f93

NVIDIA 6G Research Cloud

NVIDIA’s 6G Research Cloud platform empowers researchers with a novel approach to develop the next phase of wireless technology.

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