A priority control method for wireless multi-hop access using IEEE 802.11 DCF mechanism

Kenichi Kawamura; Yasuhiko Inoue; Shuji Kubota

A priority control method for wireless multi-hop access using IEEE 802.11 DCF mechanism

Kenichi Kawamura, Yasuhiko Inoue, Shuji Kubota

Research output: Contribution to conference › Paper › peer-review

Abstract

Multi-hop communication systems have been widely studied and many of them are based on the IEEE 802.11 WLAN system. This paper explains the problem of throughput degradation of a relay station when IEEE 802.11 DCF is adopted in multi-hop communications. The relay stations loose some of their capacity compared to the stations that are not relaying data of other stations. Because all stations, under the CSMA/CA protocol, will have equal transmission opportunity, the relay stations have to send packets from other terminals. In this paper, we propose an autonomous priority control method that changes the contention window size depending on the number of relay stations and the number of hops to ensure that relay stations are offered the same transmission capacity as regular stations in the service area. Then its performance is evaluated by computer simulations.

Original language	English
Pages	520-524
Number of pages	5
Publication status	Published - 2004 Dec 1
Event	2004 IEEE 15th International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2004 - Barcelona, Spain Duration: 2004 Sep 5 → 2004 Sep 8

Conference

Conference	2004 IEEE 15th International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2004
Country	Spain
City	Barcelona
Period	04/9/5 → 04/9/8

Keywords

CSMA/CA
IEEE 802.11
Multi-hop
Priority control

ASJC Scopus subject areas

Electrical and Electronic Engineering

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AB - Multi-hop communication systems have been widely studied and many of them are based on the IEEE 802.11 WLAN system. This paper explains the problem of throughput degradation of a relay station when IEEE 802.11 DCF is adopted in multi-hop communications. The relay stations loose some of their capacity compared to the stations that are not relaying data of other stations. Because all stations, under the CSMA/CA protocol, will have equal transmission opportunity, the relay stations have to send packets from other terminals. In this paper, we propose an autonomous priority control method that changes the contention window size depending on the number of relay stations and the number of hops to ensure that relay stations are offered the same transmission capacity as regular stations in the service area. Then its performance is evaluated by computer simulations.

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