Power management for VoIP over IEEE 802.11 WLAN

Author

Chen, Ye ; Smavatkul, Natt ; Emeott, Steve

Author_Institution

Motorola Labs, Schaumburg, IL, USA

Volume

3

fYear

2004

fDate

21-25 March 2004

Firstpage

1648

Abstract

Power consumption is a critical issue for voice-over-IP (VoIP) over wireless LAN applications, especially when handheld 802.11 voice terminals are used as the end-user device. This paper provides an overview of power save procedures defined in the IEEE 802.11 wireless LAN standard, and proposes a novel power management technique for stations and services that use contention-based channel access, which we call unscheduled power save delivery (UPSD). We further investigate the performance of UPSD in combination with the eDCA mechanism defined in the 802.11e draft standard via an OPNET-based simulator. The results indicate that UPSD permits a lower duty cycle and delivers better VoIP capacity than legacy techniques.

Keywords

Internet telephony; power control; wireless LAN; IEEE 802.11 WLAN; UPSD; VoIP; contention-based channel access; duty cycle; eDCA mechanism; end-user device; power consumption; power management technique; unscheduled power save delivery; voice-over-IP; Content management; Electronic mail; Energy consumption; Energy management; Handheld computers; Internet telephony; Power system management; Quality of service; Streaming media; Wireless LAN;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications and Networking Conference, 2004. WCNC. 2004 IEEE

ISSN

1525-3511

Print_ISBN

0-7803-8344-3

Type

conf

DOI

10.1109/WCNC.2004.1311800

Filename

1311800