Cross-Layer User Pairing for CSM in IEEE 802.16 Networks

Author

Aggarwal, Nikunj ; Manickam, R. Saravana ; Murthy, C. Siva Ram

Author_Institution

Dept. of Comput. Sci. & Eng., IIT Madras, Chennai, India

Volume

15

Issue

5

fYear

2011

fDate

5/1/2011 12:00:00 AM

Firstpage

515

Lastpage

517

Abstract

A novel method to solve the pairing problem for Collaborative Spatial Multiplexing (CSM) in IEEE 802.16 networks is proposed in this letter. This method profiles the traffic generated by mobile stations according to their QoS requirements. User pairs with similar traffic profiles and physical layer compatibility are chosen. We show how the pairing problem can be reduced to a minimum weight perfect matching problem which can be polynomially solved using Edmond´s algorithm. Simulation results show that the proposed method improves the capacity of the system by at least 20% while reducing the delay for real-time traffic by about 15%.

Keywords

WiMax; delays; mobile communication; quality of service; real-time systems; space division multiplexing; CSM; Edmond´s algorithm; IEEE 802.16 networks; QoS requirements; collaborative spatial multiplexing; cross-layer user pairing; delay; minimum weight perfect matching; mobile stations; physical layer compatibility; real-time traffic; traffic profiles; user pairs; Antennas; Delay; IEEE 802.16 Standards; OFDM; Physical layer; Quality of service; Throughput; IEEE 802.16 networks; Wireless networks; collaborative spatial multiplexing; quality of service;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2011.031611.102470

Filename

5739495