NDLI: A backoff algorithm based on self-adaptive contention window update factor for IEEE 802.11 DCF

Content Provider	Springer Nature Link
Author	Zhang, Changsen Chen, Pengpeng Ren, Jianji Wang, Xiaofei Vasilakos, Athanasios V.
Copyright Year	2016
Abstract	The binary exponential backoff (BEB) mechanism is applied to the packet retransmission in lots of wireless network protocols including IEEE 802.11 and 802.15.4. In distributed dynamic network environments, the fixed contention window (CW) updating factor of BEB mechanism can’t adapt to the variety of network size properly, resulting in serious collisions. To solve this problem, this paper proposes a backoff algorithm based on self-adaptive contention window update factor for IEEE 802.11 DCF. In WLANs, this proposed backoff algorithm can greatly enhance the throughput by setting the optimal CW updating factor according to the theoretical analysis. When the number of active nodes varies, an intelligent scheme can adaptively adjust the CW updating factor to achieve the maximal throughput during run time. As a result, it effectively reduces the number of collisions, improves the channel utilization and retains the advantages of the binary exponential back-off algorithm, such as simplicity and zero cost. In IEEE 802.11 distributed coordination function (DCF) protocol, the numerical analysis of physical layer parameters show that the new backoff algorithm performance is much better than BEB, MIMD and MMS algorithm.
Starting Page	749
Ending Page	758
Page Count	10
File Format	PDF
ISSN	10220038
Journal	Wireless Networks
Volume Number	23
Issue Number	3
e-ISSN	15728196
Language	English
Publisher	Springer US
Publisher Date	2016-01-12
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Back-off algorithm Contention window IEEE 802.11 DCF Normalized system throughput Communications Engineering, Networks Computer Communication Networks Electrical Engineering IT in Business
Content Type	Text
Resource Type	Article
Subject	Computer Networks and Communications Information Systems Electrical and Electronic Engineering

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