Performance analysis of an improved power-saving medium access protocol for IEEE 802.11 point coordination function WLAN

Ghazanfar Safdar, William Scanlon

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Wireless enabled portable devices must operate with the highest possible energy efficiency while still maintaining a minimum level and quality of service to meet the user's expectations. The authors analyse the performance of a new pointer-based medium access control protocol that was designed to significantly improve the energy efficiency of user terminals in wireless local area networks. The new protocol, pointer controlled slot allocation and resynchronisation protocol (PCSAR), is based on the existing IEEE 802.11 point coordination function (PCF) standard. PCSAR reduces energy consumption by removing the need for power saving stations to remain awake and listen to the channel. Using OPNET, simulations were performed under symmetric channel loading conditions to compare the performance of PCSAR with the infrastructure power saving mode of IEEE 802.11, PCF-PS. The simulation results demonstrate a significant improvement in energy efficiency without significant reduction in performance when using PCSAR. For a wireless network consisting of an access point and 8 stations in power saving mode, the energy saving was up to 31% while using PCSAR instead of PCF-PS, depending upon frame error rate and load. The results also show that PCSAR offers significantly reduced uplink access delay over PCF-PS while modestly improving uplink throughput.
Original languageEnglish
Pages (from-to)697-704
Number of pages8
JournalIEE Proceedings - Communications
Volume153 (5)
Issue number5
DOIs
Publication statusPublished - Oct 2006

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Wireless local area networks (WLAN)
Network protocols
Energy efficiency
Medium access control
Wireless networks
Energy conservation
Quality of service
Energy utilization
Throughput

Cite this

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title = "Performance analysis of an improved power-saving medium access protocol for IEEE 802.11 point coordination function WLAN",
abstract = "Wireless enabled portable devices must operate with the highest possible energy efficiency while still maintaining a minimum level and quality of service to meet the user's expectations. The authors analyse the performance of a new pointer-based medium access control protocol that was designed to significantly improve the energy efficiency of user terminals in wireless local area networks. The new protocol, pointer controlled slot allocation and resynchronisation protocol (PCSAR), is based on the existing IEEE 802.11 point coordination function (PCF) standard. PCSAR reduces energy consumption by removing the need for power saving stations to remain awake and listen to the channel. Using OPNET, simulations were performed under symmetric channel loading conditions to compare the performance of PCSAR with the infrastructure power saving mode of IEEE 802.11, PCF-PS. The simulation results demonstrate a significant improvement in energy efficiency without significant reduction in performance when using PCSAR. For a wireless network consisting of an access point and 8 stations in power saving mode, the energy saving was up to 31{\%} while using PCSAR instead of PCF-PS, depending upon frame error rate and load. The results also show that PCSAR offers significantly reduced uplink access delay over PCF-PS while modestly improving uplink throughput.",
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Performance analysis of an improved power-saving medium access protocol for IEEE 802.11 point coordination function WLAN. / Safdar, Ghazanfar; Scanlon, William.

In: IEE Proceedings - Communications, Vol. 153 (5), No. 5, 10.2006, p. 697-704.

Research output: Contribution to journalArticle

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