Priority Collision Resolution - Distributed Coordination Function for Distributed Wireless Networks
Xiaohui Ye
Xin Liu
Ben Yoo, S.J.
Zhi Ding
Univ. of California, Davis;
This paper appears in: Global Telecommunications Conference, 2007. GLOBECOM '07. IEEE
Publication Date: 26-30 Nov. 2007
On page(s): 4708-4713
Location: Washington, DC,
ISBN: 978-1-4244-1043-9
INSPEC Accession Number: 9824002
Digital Object Identifier: 10.1109/GLOCOM.2007.893
Current Version Published: 2007-12-26
Abstract
In distributed wireless access networks, the short-term unfairness of IEEE 802.11 distributed coordination function (DCF) has been revealed by many works. In this paper, a modified DCF, based on the principle of priority collision resolution (PCR), is proposed to improve the short-term fairness in distributed access wireless networks. Our PCR-DCF achieves short-term fairness improvement without estimating behaviors of other users and the system contention level, such as the number of active users. Only the capability to identify collision is required. Theoretical analysis is carried out to validate the performance of PCR-DCF based on a slotted system model. Both simulations and analyses show that PCR-DCF has a much smaller packet transmission delay jitter than IEEE 802.11 DCF, with little degradation on the average packet transmission delay. Moreover, the analysis and simulation results indicate that PCR- DCF also experiences a much lower packet drop rate than IEEE 802.11 DCF in almost all load ranges with reasonable retransmission limit.
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