An Uplink Medium Access Protocol with SDMA Support for Multiple-Antenna WLANs

Author

Zhou, Sheng ; Niu, Zhisheng

Author_Institution

Tsinghua Univ., Beijing

fYear

2008

fDate

March 31 2008-April 3 2008

Firstpage

1809

Lastpage

1814

Abstract

In this paper, we propose a contention based uplink medium access control (MAC) protocol design for wireless local area networks (WLANs) with spatial division multiple access (SDMA) support. Our protocol does not require sophisticated smart antenna equipments, and it can be implemented in simple omni-directional multiple-antenna WLANs. Different from the super-frame based approaches, the proposed one is a pure contention based MAC protocol and can be easily implemented into standard 802.11 systems with slight modifications. By jointly considering the the physical and the MAC layer situations, dynamic system parameter adjustment is designed to enhance throughput and protocol efficiency. In addition, our protocol provides interface for user scheduling, which makes it more extensible. Simulation results show that our scheme can achieve high network throughput, and discussions regarding different system factors are also included.

Keywords

adaptive antenna arrays; multifrequency antennas; space division multiple access; wireless LAN; MAC protocol; SDMA support; multiple-antenna WLAN; smart antenna equipments; spatial division multiple access; standard 802.11 systems; uplink medium access protocol; wireless local area networks; Access protocols; Channel estimation; Frequency synchronization; Media Access Protocol; Multiaccess communication; OFDM; Physical layer; Throughput; Wireless LAN; Wireless application protocol;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications and Networking Conference, 2008. WCNC 2008. IEEE

Conference_Location

Las Vegas, NV

ISSN

1525-3511

Print_ISBN

978-1-4244-1997-5

Type

conf

DOI

10.1109/WCNC.2008.322

Filename

4489353