2021 International Conference on Risk Analysis and Emergency Management (RAEM2021)
Prof. Li Suoping



Prof. Li Suoping

Lanzhou University of Technology, China

Speech titlePerformance Analysis of a Novel Distributed C-ARQ Scheme fo IEEE 802.11 Wireless Networks


It is well-known that the cooperative communication and error control technology can improve the network performance, but most existing cooperative MAC protocols have not focused on how to cope with the contention process caused by cooperation and how to reduce the bad influence of channel packet error rate on the system performance. Inspired by this, this paper first modifies and improves the basic rules of the IEEE 802.11 Medium Access Control (MAC) protocol to optimize the contention among the multi-relay in a cooperative ARQ scheme. Secondly, a hybrid ARQ protocol with soft combining is adopted to make full use of the effective information in the error data packet and hence improve the ability of the receiver to decode the data packet correctly. The closed expressions of network performance including throughput and average packet transmission delay in a saturated network are then analyzed and derived by establishing a dedicated two-dimensional Markov model and solving its steady-state distribution. Finally, the performance evaluation and superiority of the proposed protocol are validated in different representative study cases through MATLAB simulations.

Brief biography:

Suoping Li, IEEE Member, is a full professor of school of science at Lanzhou University of Technology (LUT), China. He received the Ph.D. degree in Signal and Information Processing from Beijing Jiaotong University, China, in 2004. He also hold a M.Sc. degree in Stochastic Model with Applications from Lanzhou University in 1996, and B.Sc. degree in Mathematics from Northwest Normal University in 1986. He was a visiting scholar at Swiss Federal Institute of Technology Zurich (ETH) from May 2007 to May 2008, and also a visiting professor at American East Texas Baptist University (ETBU) from Aug to Dec 2011. He completed short academic visits at Universite de Technologie Belfort-Montbeliard (UTBM) France in 2017 and at Università degli Studi dell’Aquila (UNIVAQ) Italy in 2018. His primary research interests include stochastic signal analysis, design of data communication protocol, stochastic modeling analysis of wireless communication network such as  ad hoc network, cognitive radio network, and wireless sensor network. Parts of Publications are as follows: