MAC-PHY enhancement for 802.11b WLAN systems via cross-layering

Author

Alonso, Luis ; Ferrús, Ramón ; Agustí, Ramón

Author_Institution

Dept. de Teoria del Senyal i Comunicacions, Univ. Politecnica de Catalunya, Barcelona, Spain

Volume

2

fYear

2003

fDate

6-9 Oct. 2003

Firstpage

776

Abstract

The paper analyses the performance of a novel MAC-PHY scheme for wireless local area networks (WLAN) that makes use of distributed queues and cross-layer concepts to improve radio channel utilisation. Analytical values for the maximum throughput performance are derived as a function of different scenario parameters. The obtained results show that the proposed scheme outperforms throughput bounds achieved when using a legacy 802.11 MAC protocol. The usage of distributed queues and cross-layer information eliminates back-off periods and collisions in data packet transmissions, makes performance to be independent of the number of stations transmitting in the system and provides stability for high load conditions. Furthermore, the cross-layer concept allows the MAC layer to improve its decisions by means of physical layer information knowledge.

Keywords

access protocols; packet radio networks; queueing theory; wireless LAN; IEEE 802.11b WLAN; MAC layer; MAC protocol; MAC-PHY enhancement; cross-layer concepts; data packet transmissions; distributed queues; physical layer; radio channel utilisation; throughput; wireless LAN; wireless local area networks; Electronic mail; Media Access Protocol; Performance analysis; Physical layer; Proposals; Queueing analysis; Telecommunication traffic; Throughput; Wireless LAN; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2003. VTC 2003-Fall. 2003 IEEE 58th

ISSN

1090-3038

Print_ISBN

0-7803-7954-3

Type

conf

DOI

10.1109/VETECF.2003.1285126

Filename

1285126