What Is 6G, and How Fast Will It Be?

Posted by Ryan Mai on

  • 6G is the sixth-generation wireless technology for digital cellular networks.
  • 6G will utilize the upper limits of the radio spectrum and support 1 Tbps (terabytes per second) speeds. 
  • It will bring down the latency of communication to one microsecond — 1,000 times faster than 5G latencies.

The implementation of 5G services has started a wave of competition across the globe, but more importantly, it has triggered a race to develop 6G, the next step in the world of mobile connectivity.

It seems too early to talk about 6G, but several corporations and universities have already started working on this idea. This shows how fast technology moves forward: we have managed to proceed from 1G to 5G in just four decades, so 6G is another natural progression towards enhanced digital telecommunications.

What Is 6G?

What Is 6G?

6G is the sixth-generation wireless technology for digital cellular networks. Being a successor to 5G networks, it will move beyond personalized communication towards the complete realization of the Internet of Things paradigm, connecting not just people but also autonomous vehicles, robotic agents, and computing resources.

6G networks will use higher frequencies than 5G networks, and thus offer much higher capacity and lower latency. One of the main objectives of the 6G Internet will be to bring down the latency of communication to one microsecond — 1,000 times faster than 5G latencies.

At this moment, 6G (or whatever it is eventually called) is not a functioning technology; in fact, it is far from reality. Since it is in its infancy, it is too early to say what exactly 6G could be or what kind of technologies it would enhance.

How Fast Will 6G Be?

Mạng 6G là gì? Nó sẽ hợp nhất giữa thế giới thực và kỹ thuật số

According to the Chinese Ministry of Science and Technology, 6G can support 1 Tbps (terabytes per second) speeds, approximately 8,000 times higher than the existing 5G speeds.

In addition to providing much higher throughput, 6G’s higher frequencies will enable significantly faster sampling rates. This will further enhance the performance of 5G applications and unlock the potential of increasingly data-hungry applications across the realms of wireless imaging and sensing.

6G networks are also expected to provide extreme coverage extension (including coverage undersea, in high altitude, and in space) while consuming low power. However, this will require a complete redesign of the core network.

When To Expect It?

Every decade or so, a new mobile network standard takes the spotlight. This means 6G might be introduced in the early 2030s, or at least that’s when most smartphone manufacturers will tease 6G-capable mobiles, and we will see telecom companies running 6G trials.

The Chinese ministry is determined to lay out the groundwork for building 6G technology. According to the vice minister of the science ministry, 6G should be considered a priority for the development of the nation. The ministry will soon create a roadmap to develop 6G and explore its possible applications.

Japan’s NTT DoCoMo published a white paper in which they explained use cases and technological evolution of 6G, as well as the worldview in the 2030s when 6G will be deployed. The paper also sheds light on how mobile network technology has evolved in the past decades, with 3G coming in the early 2000s, 4G in 2010, and 5G in 2020.

6G Benefits

The clearest distinction between 5G and 6G will be speed and latency. The same parameters separate 4G and 5G in terms of performance, so we can expect that future 6G services will meet the stringent network demands of the 2030s.

Evolution of cellular networks, with representative applications for each generation

6G wireless sensing solutions might utilize different frequencies to determine absorption and configure frequencies accordingly. While 5G technology uses high radio frequencies ranging from 24 GHz to 72 GHz, 6G will use the upper limits of the radio spectrum (300 GHz) and might even approach terahertz ranges. The higher the radio spectrum, the more data it can carry.

6G will have major impacts in various fields, such as:

  1. Augmented/Virtual Reality: Just like video applications saturated 4G networks, the proliferation of AR and VR apps will deplete the 5G spectrum and require networks with capacity over 1 Tbps, instead of just 20 Gbps target defined for 5G. The low (micro-level) latency of 6G will enable real-time user interaction in immersive surroundings.
  2. Holographic Telepresence: A 3D holographic display with full parallax, colors, and 30 fps would require a data rate of over 4 Tbps and a latency of sub-ms. 6G will be able to fulfill such requirements: the networks will have enough bandwidth to transfer all the five human senses in digital form to provide an immersive remote experience.

According to Marcus Weldon, president of Nokia Bell Labs, 6G will be a sixth sense experience for humans and machines where biology meets artificial intelligence.

  • eHealth: Lack of real-time tactile feedback and high cost are two major limitations of eHealth services. 6G is expected to eliminate these barriers through remote surgery and improved healthcare workflow optimizations. The ultralow latency, high reliability, and refined intelligence of 6G technology will provide ten times gain in spectral efficiency.
  • Pervasive Connectivity: The number of mobile devices is expected to cross 125 billion by 2030. 6G will connect all these devices as well as autonomous vehicles and sensors. However, it must be 10-100 times more energy-efficient than 5G networks to enable inexpensive, scalable deployments, with better coverage and low environmental impact.
  • Robotics and Unmanned Mobility: Connecting large autonomous transportation systems require low latency and unprecedented levels of reliability to guarantee passenger safety, even in extremely high mobility scenarios (up to 600 miles/h). Also, the growing number of sensors on vehicles and drones will require more data. 6G technology might pave the way for these connected systems through advances in software, hardware, and new connectivity solutions.

Who Is Working On 6G?

6G technology is a decade away, but few countries and telecom companies have already started working on it.

The University of Oulu in Finland was the first one to focus on 6G research. They created a 6G Flagship program to explore various challenging research areas such as reliable unlimited wireless connectivity, distributed computing and intelligence, and materials to be utilized in future networks.

In 2019, the Federal Communications Commission adopted new rules to speed up the deployment of new services in the spectrum above 95 GHz.

The Commission’s First Report and Order, titled “Spectrum Horizon” develops a new segment of experimental license for use in the frequencies ranging from 95 GHz to 3 THz. This will enable entrepreneurs and innovators to readily access this spectrum and develop/test new communications technologies.

Researchers at Virginia Tech and companies like LG and Samsung have begun working on 6G technology. Moreover, Japan is reportedly planning a comprehensive strategy to launch 6G networks by 2030.

Do We Need 6G?

Do We Need 6G?

Although 5G is designed to improve everything from healthcare to entertainment and make the Internet more accessible, 6G would make sense if those areas will have room for improvement beyond 5G.

Maybe by 2030, we will have developed better techniques for transmitting large volumes of data or amply signals strong enough that there is no need to set up 6G cell towers.

Eventually, whether it is 5G, 6G, or another ‘G’, we will have such incredible speeds and ultralow latencies that no wait times or progress bars will be required to access any fair amount of data, at least as per today’s standards. Whatever we need will be there instantly, and we won’t have to come up with new terms to describe it.

6G technology: 5 things you can expect to see in 2030

6G may seem a long way off. But despite 5G still being rolled out by MNOs around the world, this hasn’t stopped analysts turning their gaze toward 6G technology, with a new white paper from Finland’s University of Oulu focusing on the challenges and trends we can expect to see over the next decade.

The paper, released by the University’s ‘6G Flagship’ research team, is based on the feedback of 70 experts, all of whom attended a workshop at the first 6G Wireless Summit in March.

Scrutinizing 6G technology

Professor Matti Latva-aho, director of 6G Flagship at the University of Oulu, edited the white paper with his colleague, professor Kari Leppänen. And Latva-aho is adamant that now is the time to start scrutinizing the effects and challenges of 6G.

“As 5G research is maturing and continues to support global standardisation, we must already engage in mapping what 6G can become at its boldest,” says Latva-aho.

1. New bands

“For the foreseeable future, operation in the lower frequency bands (below 4 GHz), currently used for mobile communication networks, are expected to remain stable and dominated by MNOs8 due to long-term spectrum licenses. With 6G however, new bands that target super-efficient short-range networks for both indoor environments and outdoor city spaces will become common (Figure 5). These local networks will target verticals with specialized demand and will be deployed by different stakeholders opening the market to new players, new investments and new ecosystems.”

2. Smartphones no more

“While smartphones have become an indispensable part of our lives, rapid advances in new display technologies, sensing and imaging devices, and low-power specialized processors are ushering in a new era in which our devices will become seamlessly integrated with our senses and motoric control. 

6G networks will use the edge to handle positioning, 3D point cloud mapping, and mixed reality data fusion

6G networks will use the edge to handle positioning, 3D point cloud mapping, and mixed reality data fusion (Image credit: 6G Flagship)

"Virtual (VR), augmented (AR), and mixed reality (MR) technologies are merging into XR, which encompasses wearable displays and interaction mechanisms that create and maintain perceptual illusions. Users will accept an alternative version of reality that enhances their ability to consume media, search the Internet, explore real and virtual worlds, collaborate on work projects, connect with family and friends, and engage in restorative activities.”

3. Breaking the 1Tbps speed barrier

“6G research should look at the problem of transmitting up to 1Tbps per user. This is possible through the efficient utilization of the spectrum in the THz regime. Extended spectrum towards THz will enable merging communications and new applications such as 3D imaging and sensing. However, new paradigms for transceiver architecture and computing will be needed to achieve these – there are opportunities for semiconductors, optics and new materials in THz applications to mention a few.” 

4. AI and ML

“Artificial intelligence and machine learning will play a major role both in link and system-level solutions of 6G wireless networks. New access methods will be needed for truly massive machine-type communications. Modulation and duplexing schemes beyond Quadrature Amplitude Modulation (QAM) and Orthogonal Frequency Division Multiplexing (OFDM) must be developed and possibly it is time to start looking at analogue types of modulation at THz frequencies.” 

5. Critical security

"Security at all levels of future systems will be much more critical in the future and 6G needs a network with embedded trust. The strongest security protection may be achieved in the physical layer. During the 6G era it will be possible to create data markets, and thus, privacy protection is one key enabler for future services and applications.” 
For more information, and to read the white paper in full, please visit the University of Oulu repository Or download the PDF report directly here. 
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