Distributed MAC adaptation for WLAN QoS differentiation

Author

Zhao, Jun ; Guo, Zihua ; Zhang, Qian ; Zhu, Wenwu

Author_Institution

Beijing Sigma Center, China

Volume

6

fYear

2003

fDate

1-5 Dec. 2003

Firstpage

3442

Abstract

In current WLAN system that is designed for best-effort communications, there is not any quality of service (QoS) differentiation support. In this paper, we propose a fully distributed medium access control (MAC) adaptation method for service differentiation. It is implemented by dynamically updating the MAC layer parameters (such as contention window) to adapt to the network conditions in a class-based fashion. In this sense, the QoS classes are differentiated and the system performance is significantly improved in terms of delay, packet loss and throughput while ensuring fairness and stability. The key idea of our scheme is the introduction of a mapping function and a target contention window. It is demonstrated that our proposed adaptive MAC can outperform both the basic 802.11 MAC and the fixed differentiation scheme with very low complexity.

Keywords

access protocols; quality of service; wireless LAN; QoS; WLAN system; delay; fixed differentiation scheme; mapping function; medium access control adaptation method; packet loss; quality of service; system performance; target contention window; wireless local area network; Asia; Costs; Data communication; Delay; Media Access Protocol; Quality of service; Stability; System performance; Throughput; Wireless LAN;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Telecommunications Conference, 2003. GLOBECOM '03. IEEE

Print_ISBN

0-7803-7974-8

Type

conf

DOI

10.1109/GLOCOM.2003.1258874

Filename

1258874