IEEE Future Networks World Forum
On-Demand through 15 November 2022

TUT4: What is URLLC of 5G – Where is it needed?


Ultra-Reliable Low Latency Communication (URLLC) is an important part of the 5G release from the 3GPP cellular standard. It specifies 99.9999% reliability (10 times tougher than currently accepted in telecommunication systems). It specifies low latency of 1ms or less, which is much shorter than the 30ms – 100ms typically accepted for all IP networks as end-to-end latency. This tutorial discusses the reasons why URLLC was proposed by 3GPP in 5G, where its requirements and applications are described. This includes its impact on the future of IP networks and the Ethernet. It describes other aspects, such as alternative point-to-point wireless links for backhaul that offer latency of less than 1ms. Therefore, whether they will become the dominant network for future backhaul is a factor that must be explored. Questions such as “does the current IP specification lend itself to reducing latency, and can something be done about it?” must be answered. Finally, some of the applications where URLLC is useful will be discussed. Examples of its usefulness are illustrated. Its deployment options, reliability, and latency considerations will be briefly reviewed.


Krishnamurthy RaghunandanMTA New York City Transit

Short Bio: Raghunandan (Raghu) currently leads new wireless technology deployment effort in MTA New York City Transit. Part of this effort was to provide 5G service in all the below ground subway stations and on buses. He deployed 60GHz Millimetric wave links with point-to-multipoint WiFi network that brought video traffic to security booths. This method is used as an alternative to fiber in difficult terrains. An integral part of his work is to try new wireless technologies in the transit environment. He is a member of FCC Region-8 regulatory body, that coordinates spectrum allocations for public safety in metro region.
Prior to joining Transit, he worked in Bell Labs (1993-2004) leading the RAN (Radio Access Network) team at 3GPP standards body that is currently spear heading 5G standards. He was instrumental in development of cellular handsets by leading the field test and interoperability effort. He was responsible for developing Sirius satellite radio chipset currently used in all premium cars and trucks throughout Canada, USA and Mexico. He has several publications in the IEEE and holds a US patent.
Raghu has undergraduate degree in EE from Univ. of Mysore, Master’s degree in EE from Indian Institute of Technology, Kharagpur and Research degree in EE from University of Surrey, England. He has written the textbook “Introduction to wireless communication and networks : A practical perspective”. This book is part of the telecommunication textbook series published by Springer and approved by the IEEE ComSoc as a textbook for undergraduate students. He is chair of AP/EMC/VT chapter for NJ coast and Princeton sections of IEEE. He was inducted as a member of HKN honor society of the IEEE.



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