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Advantages of 6G wireless | disadvantages of 6G wireless

This page covers advantages and disadvantages of 6G wireless technology and its basics including 6G wireless features. It mentions benefits or advantages of 6G wireless and challenges or drawbacks or disadvantages of 6G wireless.

What is 6G wireless?

Introduction: 6G refers to sixth generation of wireless technology. The research has been started in 2019 to develop the 6G wireless technology which follows its predecessor 5G wireless. The 5G wireless has been launched in several cities of USA in April 2019.

6G vision

The goal of 6G is to fulfill 5G vision as well as to meet following.
• Wisdom connection (Intelligent connectivity with the help of AI (Artificial Intelligence)
• Depth connection (Deep connectivity)
• Holographic connection (Holographic connectivity) refers to seamless coverage anywhere using AR (Augmented Reality)/VR (Virtual Reality)
• Ubiquitous connection (Ubiquitous connectivity) to cover Space, Air, Ground and Sea.

6G Network Architecture

The figure-2 depicts 6G network architecture covering everywhere with 6G connections. As shown 6G communications have been provided everywhere with the help of drones, satellites, RRHs (Remote Radio Heads), VLC (Visible Light Communications), BSs (Base Stations), 6G network equipments mounted on moving things and so on. Following table mentions 6G wireless features.

6G Wireless Features

Benefits or advantages of 6G wireless

Following are the benefits or advantages of 6G wireless:
➨It is designed to support higher number of mobile connections greater than the 5G capacity which is about 10 x 105 per Km2.
➨6G will revolutionize the health-care sector which eliminates time and space barriers through remote surgery and guaranteed health-care workflow optimizations.
➨As most of the mobile traffic is generated indoors. Moreover cellular networks have never really been designed to target indoor coverage efficiently. 6G overcomes these challenges using femtocells or Distributed Antenna Systems (DASs).
➨6G uses THz (Terahertz) frequencies which has many advantages as follows. THz waves can easily absorbs moisture in the air hence it is useful for high speed short range wireless communications. Terahertz offers narrow beam and better directivity resulting into secure communication which is achieved due to strong anti interference capability. High wireless bandwidth (several tens of GHz) from 108 to 1013 GHz can deliver higher communication rate in Tb/sec. In space communication, terahertz waves are used to possible ossless transmission between satellites. Beamforming and massive MIMO multiplexing gain helps to overcome rain attenuation and fading propagation in order to meet urban coverage requirements. Terahertz wave's photon energy is very low (about 10-3eV which offers higher energy efficiency. THz waves can penetrate substances with less attenuation which can be used for some special communication means.
➨6G wireless uses visible lights which leverage benefits of LEDs such as illumination and high speed data communication. VLC does not produce EM (electromagnetic) radiation. Hence it is not susceptible to external EM interference. VLC also helps in building network security.
➨6G offers very high data rate (Tb/sec) and very low latency (sub-ms). Hence many applications can make use of 6G wireless networks.
➨6G will virtualize additional components, such as PHY layer and MAC layer. Currently PHY/MAC implementations require dedicated hardware implementations. The virtualization will decrease the costs of networking equipments. This makes massively dense deployment in 6G economically feasible.

Challenges or Drawbacks or disadvantages of 6G wireless

Following are the challenges rather than drawbacks or disadvantages of 6G wireless. As the technology is under research and development we can not conclude any particular drawbacks or disadvantages of 6G now until we will have 6G system installed for trial and testing.
➨6G uses cell-less architecture and multi-connectivity. Hence seamless mobility and integration of different kinds of links (THz, VLC, mmwave, sub-6GHz) need perfect scheduling. In cell-less architecture, UE connects to the RAN and not to a single cell. The challenge here is to design new network architecture.
➨6G uses THz (Terahertz) frequencies for part of its communications, hence drawbacks of THz can be considered as drawbacks of 6G wireless technology. The terahertz frequency refers to the spectrum between 0.1 to 10 THz EM (electromagnetic) wave wiith wavelength of 30 to 3000 micrometers. Terahertz waves can be widely used in the space communications particularly suitable for use between the satellite. THz signal is very sensitive to the shadows which has great impact on coverage. Moreover lower frequency terahertz frequency incurs larger free space fading. Ultra-large-scale antenna is a major challenge in THz which requires high bandwidth and massive quantitative high resolution. Processing power is major challenge in designing low power and low cost 6G devices.
➨6G uses visible light frequencies for part of its communications, hence drawbacks of VLC can be considered as drawbacks of 6G wireless technology. Visible light uses wavelength from 390-700 nm.
➨In order to manage large number of terminals and networking equipments more efficient and less energy consuming 6G system is a must. In order to fulfill this, network and terminal equipments circuitry and the communication protocol stack design is a challenge. The energy harvesting strategies are adopted to handle this requirement.

Conclusion: In order to understand advantages of 6G wireless and disadvantages of 6G wireless one has to understand 6G wireless technology basics and its difference with previous technologies such as 5G vs 6G >> and 4G vs 5G >>.



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5G Wireless TECHNOLOGY RELATED LINKS

This 5G tutorial also covers following sub topics on the 5G technology:
5G basic tutorial    5G Frequency Bands    5G millimeter wave tutorial    5G mm wave frame    5G millimeter wave channel sounding    Difference between 4G and 5G    5G testing and test equipments    5G network architecture    5G NR Physical layer    5G NR MAC layer    5G NR RLC layer    5G NR PDCP layer



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This 5G tutorial also covers following sub topics on the 5G technology:
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