An Adaptive Grouping Scheme in Ultra-Dense IEEE 802.11ax Network Using Buffer State Report Based Two-Stage Mechanism  

作　　者：Jiyang Bai He Fang Junghoon Suh Osama Aboul-Magd Edward Au Xianbin Wang 

机构地区：[1]Department of Electrical and Computer Engineering,Western University,London,ON N6A 5B9,Canada [2]Huawei Technologies Canada Co.,LTD.,Ottawa,ON K2K 3J1,Canada

出　　处：《China Communications》2019年第9期31-44,共14页中国通信（英文版）

摘　　要：IEEE 802.11ax,which is an emerging WLAN standard,aims at providing highly efficient communication in ultra-dense wireless networks.However,due to a large number of stations(STAs)in the ultra-dense device deployment scenarios,the potentially high packet collision rate significantly decreases the communication efficiency of WLAN.In this paper,we propose an adaptive STA grouping scheme to overcome this dense network challenge in IEEE 802.11ax by using Buffer State Report(BSR)based Two-stage Mechanism(BTM).In order to achieve the optimal efficiency of BSR delivery,we analyze the functional relationship between STA number in group and Resource Unit(RU)efficiency.Based on this analysis results,an adaptive STA grouping algorithm with variable group size is proposed to achieve efficient grouping in BTM.The numerical results demonstrate that the proposed adaptive BTM grouping algorithm significantly improves the BSR delivery efficiency and the throughput of overall system and each STA in the ultra-dense wireless network.IEEE 802.11 ax, which is an emerging WLAN standard, aims at providing highly efficient communication in ultra-dense wireless networks. However, due to a large number of stations(STAs) in the ultra-dense device deployment scenarios, the potentially high packet collision rate significantly decreases the communication efficiency of WLAN. In this paper, we propose an adaptive STA grouping scheme to overcome this dense network challenge in IEEE 802.11 ax by using Buffer State Report(BSR) based Two-stage Mechanism(BTM). In order to achieve the optimal efficiency of BSR delivery, we analyze the functional relationship between STA number in group and Resource Unit(RU) efficiency.Based on this analysis results, an adaptive STA grouping algorithm with variable group size is proposed to achieve efficient grouping in BTM. The numerical results demonstrate that the proposed adaptive BTM grouping algorithm significantly improves the BSR delivery efficiency and the throughput of overall system and each STA in the ultra-dense wireless network.

关 键 词：IEEE 802.11ax Orthogonal Frequency-Division Multiple ACCESS (OFDMA) Buffer Status REPORT (BSR) UPLINK OFDMARandom ACCESS (UORA) GROUPING 

分 类 号：TN9[电子电信—信息与通信工程]