Multiusers parallel competitive channel protocol based on unsaturated service

• Published in: China communications Vol. 20; no. 9; pp. 96 - 114
• Main Authors: Li, Yong, Gao, Miao, Xu, Xin, Zheng, Guang, Qiao, Hongbo, Ma, Xinming, Dong, Ping
• Format: Journal Article
• Language: English
• Published: China Institute of Communications 01-09-2023; Henan Engineering Laboratory of Farmland Monitoring and Control,Zhengzhou 450046,China%College of Information and Management Science,Henan Agricultural University,Zhengzhou 450046,China; College of Information and Management Science,Henan Agricultural University,Zhengzhou 450046,China
• Subjects: high density deployment scenarios; IEEE 802.11ax Standard; Protocols; spatial clustering group; Throughput; unsaturated services; Uplink; Wireless communication; Wireless LAN; wireless local area network; unsaturated services; spatial clustering group; high density deployment scenarios; wireless local area network
• ISSN: 1673-5447
• DOI: 10.23919/JCC.ea.2021-0219.202302

In order to enhance the area throughput of next generation wireless local area network (WLAN) in high density scenarios, orthogonal frequency division multiple access (OFDMA) has been adopted as one of the key technologies in the next generation WLAN communication standards. However, the performance of the existing media access control (MAC) degrades significantly under unsaturated services. Therefore, this paper proposes a multi-user parallel contention channel MAC (MU-MAC) based on unsaturated services, which can effectively reduce the channel access conflict and improve the OFDMA access efficiency of cluster member nodes. On this basis, MU-MAC is enhanced for the spatial clustering group (SCG) formation protocol and support for the unsaturated service characteristics. Further, the optimal access radius when the service is in a non-saturated state is analyzed to make the relevant theoretical analysis more generally, and the expressions for the throughput and area throughput of the proposed protocol are modeled and derived. The simulation results verify the correctness of the theoretical analysis and the efficiency of the protocol performance. The results show that MU-MAC outperforms IEEE 802.11ax and OMAX protocol in area throughput by 40.72% and 104.15%, respectively.