Coordinated Scheduling of 802.11ax Wireless LAN Systems Using Hierarchical Clustering

Kenichi KAWAMURA
Akiyoshi INOKI
Shouta NAKAYAMA
Keisuke WAKAO
Yasushi TAKATORI

Publication
IEICE TRANSACTIONS on Communications   Vol.E104-B    No.1    pp.80-87
Publication Date: 2021/01/01
Publicized: 2020/07/14
Online ISSN: 1745-1345
DOI: 10.1587/transcom.2019EBP3254
Type of Manuscript: PAPER
Category: Wireless Communication Technologies
Keyword: 
wireless LAN,  IEEE 802.11ax,  heterogeneous networks,  coordinated control,  uplink multi-user access,  hierarchical clustering,  

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Summary: 
A method is presented for increasing wireless LAN (WLAN) capacity in high-density environments with IEEE 802.11ax systems. We propose using coordinated scheduling of trigger frames based on our mobile cooperative control concept. High-density WLAN systems are managed by a management server, which gathers wireless environmental information from user equipment through cellular access. Hierarchical clustering of basic service sets is used to form synchronized clusters to reduce interference and increase throughput of high-density WLAN systems based on mobile cooperative control. This method increases uplink capacity by up to 19.4% and by up to 11.3% in total when WLAN access points are deployed close together. This control method is potentially effective for IEEE 802.11ax WLAN systems utilized as 5G mobile network components.