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Sequence Design for Broadcast And Unicast in Communication Networks

发布时间:2021-03-05 14:17:59 发布人:向川  审核人:李天镇

报告题目:Sequence Design for Broadcast And Unicast in Communication Networks

报告时间:2021年03月06日 下午15:30-16:00

会议平台:腾讯会议 会议号:943996280


Ultra-reliable and low-latency communication (URLLC) is of capital importance for the 5G wireless networks and has received a lot of attention recently. Motivated by the hard delay requirement for URLLC, we aim at devising medium access control (MAC) schemes that can guarantee packet transmissions within a bounded delay. To provide a hard guarantee on the transmission delay, deterministic MAC schemes are preferred to probabilistic MAC schemes such as Carrier Sense Multiple Access (CSMA). We regard deterministic schemes as sequence schemes in which each node is pre-assigned a transmission and reception schedule in the format of a schedule sequence. At each time slot, each node reads out its current sequence value, and then transmits or receives on a particular channel based on that value. Our discussions on sequence design are mainly conducted for two common traffic patterns: broadcast and unicast. For each traffic pattern, we consider sequence design in three time synchronization scenarios -- frame synchronization, slot synchronization and asynchronization, and under two duplex modes -- time division duplex and frequency division duplex. Our goal is to provide feasible sequence solutions to guarantee successful broadcast and unicast within a sequence period, for each of the above cases. For the frame-synchronous and slot-synchronous cases, we derive lower bounds on the sequence period, and propose sequence construction methods by which the periods can achieve the same order as the lower bounds. Methods for extending sequences feasible for the slot-synchronous case to the asynchronous case are presented.


LIU Fang (刘芳) received the B.Eng. degree from Jilin University, China, in 2015, and the Ph.D. degree from the Department of Information Engineering, The Chinese University of Hong Kong, in 2020. She is currently a Postdoctoral Fellow with the Department of Information Engineering, The Chinese University of Hong Kong. Her research interests include sequence design for wireless networks and IoT applications.