Unsaturated traffic oriented spatial clustering multiusers MAC protocol for the next generation WLAN
Unsaturated traffic oriented spatial clustering multiusers MAC protocol for the next generation WLAN
复制标题
下一代WLAN面向不饱和流量的空间聚类多用户MAC协议
DOI：
10.1504/ijipt.2021.10039317
复制
发表时间：
2021-07
影响因子：
0.3
通讯作者：
Yang Mao
中科院分区：
文献类型：
--
作者：
Li Yong;Li Bo;Yang Mao
下一代无线局域网(WLAN)需要在高密度部署场景中显著提高区域吞吐量。针对OFDMA MAC层的干扰扩散问题，已有研究提出了基于空间分簇组的OFDMA(SCG-OFDMA)协议，该协议允许地理位置较近的节点同时发送上行OFDMA数据。然而，SCG-OFDMA假设所有节点都有饱和业务，这不能直接扩展到非饱和业务的情况。提出了一种面向非饱和业务的空间分簇多用户MAC协议(SCM-MAC)。具体设计了空间聚类多用户(SCM)发现过程。在此之后，无论簇头是否有流量，它们都会为自己的组成员竞争信道。此外，还对最佳接入半径进行了理论分析。仿真结果与理论分析一致，表明SCM-MAC协议的区域吞吐量分别比IEEE 802.11ax协议和OMAX协议高34%和50%。
The next generation Wireless Local Area Network (WLAN) needs to significantly improve area throughput in high-dense deployment scenarios. Facing to the interference spread problem of OFDMA MAC, some existing studies introduce Spatial Clustering Group-based OFDMA (SCG-OFDMA) protocol, which enables geographically close nodes to send uplink OFDMA data simultaneously. However, SCG-OFDMA assumes that all the nodes have saturated traffic, which cannot be directly extended to the unsaturated traffic case. In this paper, an unsaturated traffic oriented Spatial Clustering Multiusers MAC (SCM-MAC) protocol is proposed. Specifically, Spatial Clustering Multiusers (SCM) discovery process is designed. After that, whether the cluster heads have traffic or not, they contend channel for their group members. Moreover, theoretical analysis of the optimal access radius is derived. Simulation results are in agreement with the theoretical analysis, and show that the area throughput of SCM-MAC is 34% and 50% higher than that of IEEE 802.11ax and OMAX protocol, respectively.