A new backoff algorithm based on the dynamic modulating parameters of IEEE 802.11

Authors:
Fu Jingqi;Zhang Qiang;Wang Haikuan
Affiliations:
School of Mechanical & Electronic Engineering and Automation, Shanghai University, Shanghai, China;School of Mechanical & Electronic Engineering and Automation, Shanghai University, Shanghai, China;School of Mechanical & Electronic Engineering and Automation, Shanghai University, Shanghai, China
Venue:
WiCOM'09 Proceedings of the 5th International Conference on Wireless communications, networking and mobile computing
Year:
2009

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Abstract

In this paper, a new backoff algorithm based on the dynamic modulating parameters was presented after the analysis of Binary Exponential Backoff (BEB) and Multiplicative Increase Linear Decrease (MILD) backoff algorithm of the IEEE 802.11 protocol. The new backoff algorithm reflected slot utilization to transmission probability in the wireless channel, making a average filter of every twice sending slot and changing sending priority of the re-node in the network to modulate the backoff collision window of the nodes, which reduced the network collision effectively and improved the use of wireless channel. It reduced the time delay greatly. The simulation results show that, the new backoff algorithm can estimate the current network competition more accurately, decrease the network time delay effectively, and make a better network performance.