A TCP Receiver Window Control Method at Access Point for Guaranteeing Throughput on Wireless LAN

Yoshiaki TERAOKA  Hiroyasu OBATA  Chisa TAKANO  Kenji ISHIDA  

B - Abstracts of IEICE TRANSACTIONS on Communications (Japanese Edition)   Vol.J101-B   No.2   pp.70-79
Publication Date: 2018/02/01
Online ISSN: 1881-0209
Type of Manuscript: Special Section PAPER (Special Section on Student Research)
throughput guarantee method,  WLAN,  TCP,  access point,  

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The number of applications using streaming technologies in the wireless LAN (WLAN) environment has been increasing. These applications increase to use bidirectional communications. Then, an uplink flow from the terminals to an access point (AP) also increases. Also, these streaming applications require a certain bandwidth(throughput). Therefore, a TCP receiver window control at the AP has been proposed for the WLAN in order to secure a certain throughput. However, although the TCP receiver window control at the AP can guarantee throughput, this method needs to use a TCP for guaranteeing throughout (we refer to the TCP as QoS-TCP). Thus, this method cannot secure the required throughput sufficiently without QoS-TCP. Therefore, this paper proposes a modified TCP receiver window control at the AP to secure the throughput for specific terminals and improve the total throughput by reducing the control strength for background flows immediately after the priority flow can obtain the required throughput. As a result of simulation experiments, we confirmed that the proposed method can secure the required throughput than the previous method. In addition, we evaluated the case when the target throughput dynamically changes. As a result of simulation experiments, we found that only the proposed method can guarantee the required throughput.