The Tactile Internet

10Issues and Challenges Facing Low Latency in the Tactile Internet

Tara ALI-YAHIYA

Department of Computer Science, University of Paris-Saclay, France

10.1. Introduction

The TI has given rise to a wide range of use cases with diverse type of applications. However, they are not equal in terms of their needs for network resources, and there is consequently a diversity in the requirement of end-to-end QoS assurance needs. The new applications, especially the haptic applications, may need 1 to 10 ms as an end-to-end latency especially for teleoperation case studies. The network domain should support new infrastructure to allow ultra-low latency and high reliability. Let us consider the classical view of the actual mobile network and the traditional communication protocols. They are not suitable for the applications of TI as delay is introduced in every layer of the protocol stack in the end devices, the master domain, the transport domain for the end-to-end communication. Hence, 5G is considered as the perfect candidate for transporting haptic data due to the flexible design of its access and core networks.

Involving a user in real haptic communication would rather involve the other types of their interactive senses, just like involving the voice and the video as a supportive application. However, the decision to have a standalone codec for each type of data or a hybrid codec is under study as, when dealing with QoS, each type of traffic will require a specified QoS to be guaranteed ...