Enhanced point coordinator function in IEEE 802.11 MAC protocol for infrastructure basic service set

Authors:
Ye MIng Hua;Lau Chiew Tong;Benjamin Premkumar
Affiliations:
School of Computer Engineering, Nanyang Technological University, Singapore;School of Computer Engineering, Nanyang Technological University, Singapore;School of Computer Engineering, Nanyang Technological University, Singapore
Venue:
ACOS'06 Proceedings of the 5th WSEAS international conference on Applied computer science
Year:
2006

Citing 4
Cited 0

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Abstract

Infrastructure based wireless LAN technology has been widely used in today's personal communication environment. Power efficiency and battery management have been the center of attention in the design of hand-held devices with wireless LAN capability. In this paper, a hybrid protocol named enhanced PCF operation is proposed which intelligently chooses the Access Point (AP) assisted DCF (Distributed Coordinator Function) and enhanced PCF (Point Coordinator Function) transmission mechanism of IEEE 802.11 protocol in an infrastructure based wireless LAN environment. Received Signal Strength Indicator (RSSI) is used to determine the trade-off between direct mobile-to-mobile transmission and transmission routed by AP. Based on the estimation, mobile stations can efficiently communicate directly instead of being routed through AP if they are within the vicinity of each other. Simulation results show that using the proposed protocol energy consumption of mobile devices can be reduced at the cost of slightly longer end-to-end packet delay compared to traditional IEEE 802.11 PCF protocol. However, in a non-time critical environment, this option can significantly prolong the operation time of mobile devices.