Abstract
Aiming at the problems of low efficiency of buffer information collection and sharp drop of system throughput caused by the aggravation of conflicts in the multi basic service set (BSS) high density deployment overlap coverage scenario of next generation wireless local access network (WLAN), an access point cooperation based multi-BSS multi-user full duplex multiple access protocol named as CMMFD is proposed. Firstly, a channel resource allocation algorithm for stations (STA) in overlapping coverage area is designed, in which, the access control (AC) equipment allocates the channel resources for all STA in response to buffer state and interference information (BI) according to the proportion of STA in the overlapped coverage area. Secondly, a BI information collection protocol process based on access point (AP) cooperation sending trigger frame is designed to collect all STA information. After receiving trigger frame, STA will access the channel and report BI information in p-probability according to the channel resources allocated by AC. Finally, a multi-BSS multi-user channel resource allocation algorithm based on full duplex is designed. AC allocates channel resources according to all BI information reported by AP, and schedules STA in the multi-BSS to carry out multi-user full duplex transmission over the sub-channel. Simulation results show that the throughput of the CMMFD protocol improves by 29.6%, compared with Mu-FuPlex protocol and EnFD-OMAX protocol.
Highlights
Aiming at the problems of low efficiency of buffer information collection and sharp drop of system throughput caused by the aggravation of conflicts in the multi basic service set ( BSS) high density deployment over⁃ lap coverage scenario of generation wireless local access network ( WLAN), an access point cooperation based multi⁃BSS multi⁃user full duplex multiple access protocol named as CMMFD is proposed
A BI information collection pro⁃ tocol process based on access point ( AP) cooperation sending trigger frame is designed to collect all STA informa⁃ tion
STA will access the channel and report BI information in p⁃probability according to the channel resources allocated by AC
Summary
远大 于 Mu⁃FuPlex 协 议 和 EnFD⁃OMAX 协 议。 然 而,CMMFD 协议采用 P 概率接入方式,随着 STA 规 针对下一代 WLAN 的高密集部署网络, IEEE802.11be 技术的关注的从单 AP 向多 AP 场景 的转换以及极高吞吐量传输的技术目标。 本文充分 挖掘 IEEE802.11be 中多 AP 协作关键技术,提出一 种基于 AP 协作的多小区多用户全双工 MAC 协议。 通过协作组内的多 AP 协作,将协作组内的 STA 进 行分组,统一分配信道资源,降低重叠区域内 STA 竞争冲突, 以及非重叠区域内 STA 的信道资源复用,极大地提升了系统的 BI 信息收集效率,全双工 链路对的成功传输概率,从而提升系统吞吐量。 仿真结果表明, CMMFD 协 议 与 Mu⁃FuPlex 协 议 和 EnFD⁃OMAX 协议相比,系统吞吐量提升了 29.6%。 后续研究将对重叠区域与非重叠区域进行更细的分 组以及协作组内 AP 的位置部署进行优化,从而进 一步系统吞吐量。 [6] YANG M, LI B, YAN Z, et al AP coordination and full⁃duplex enabled multi⁃band operation for the generation WLAN: IEEE 802.11be ( EHT) [ C] ∥2019 11th International Conference on Wireless Communications and Signal Processing, Xi′an, China, 2019: 1⁃7
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