NDLI: Contention-polling duality coordination function for IEEE 802.11 WLAN family

Content Provider	IEEE Xplore Digital Library
Author	Sheng-Tzong Cheng Mingzoo Wu
Copyright Year	1972
Abstract	The contention-based DCF suffers from collision seriously under heavy load conditions. In this paper, a novel medium access control protocol called contention-polling duality coordination function (CPDCF) is proposed to enhance the DCF-based MAC protocol. A polling ACK mechanism is introduced to admit the designated station to transmit without performing any contention process. By eliminating collisions and preventing waste from idle backoff slots, the system capacity is increased effectively. A mathematical model is developed to analyze the saturation throughput of the CPDCF with various CP combinations. The performance in terms of fairness is studied as well. The model accuracy is verified via extensive simulations. Numerical results show that the well-managed CPDCF can achieve a significantly higher system capacity than the legacy DCF does. The CPDCF is also employed to enhance the performance of IEEE 802.11e EDCA. We conclude that the proposed CPDCF is quite feasible, effective, and can be easily integrated with the widespread DCF-based devices.
Starting Page	779
Ending Page	788
Page Count	10
File Size	504041
File Format	PDF
ISSN	00906778
Volume Number	57
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-03-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Wireless LAN Access protocols Media Access Protocol Web and internet services Wireless application protocol Throughput Multiaccess communication Computer science Delay Mathematical model WLAN, MAC Protocol, CSMA/CA, DCF, PCF, EDCA
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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