Load-Based dynamic backoff algorithm for qos support in wireless ad hoc networks

  • Authors:

  • Chang-Keun Seo;Weidong Wang;Sang-Jo Yoo

  • Affiliations:

  • Graduate School of Information Technology & Telecommunications, Inha University, Incheon, Korea;Graduate School of Information Technology & Telecommunications, Inha University, Incheon, Korea;Graduate School of Information Technology & Telecommunications, Inha University, Incheon, Korea

  • Venue:
  • MSN'05 Proceedings of the First international conference on Mobile Ad-hoc and Sensor Networks
  • Year:
  • 2005

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Abstract

The stations that use a shared medium like IEEE 802.11 wireless LAN have transmission opportunities by contention in the contention period. If there are collisions in the contention period, a medium access control protocol may solve collisions by using a backoff algorithm. The backoff algorithm is an important part of the medium access control protocol, but a legacy backoff method used in IEEE 802.11 standard is not efficiently adjusted depending on the load condition and priorities. In this paper, we propose a new load-based dynamic backoff algorithm to improve throughput of medium and to reduce the number of collisions. The proposed backoff algorithm can increase network utilization about 20% than that of the binary exponential backoff algorithm.