Challenges in Transport Layer Design for Terahertz Communication-Based 6G Networks

With the launch of 3GPP fifth-generation (5G) commercial cellular networks around the world, the research community has started focusing on the design of the sixth-generation (6G) system. One of the considerations is the use of Terahertz communications that aims to provide 1 Tbps (terabits per second) and air latency less than 100 μs. Further, 6G networks are expected to provide for more stringent Quality of Service (QoS) and mobility requirements. While addition to innovations at the physical layer and radio technologies can achieve these goals to a great extent, the end-to-end applications would still face challenges to fully utilize the network capacity due to limitations of the current transport layer protocols. In this chapter, we explore the challenges in the design of next-generation transport layer protocols (NGTP) in 6G Terahertz communication-based networks. Some of the challenges are due to user mobility, high-speed and high-bitrate communications, and other issues. The impact of these issues and potential approaches to mitigate these challenges are also discussed.

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