Contention-based prioritized opportunistic medium access control in wireless LANs

Miao Zhao, Huiling Zhu, Wenjian Shao, Victor O.K. Li, Yuanyuan Yang

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

11 Citations (Scopus)


In wireless environments, the inherent time-varying characteristics of the channel pose great challenges on medium access control design. In recent years, multiuser diversity and opportunistic medium access control schemes have been proposed to deal with the channel variation in order to efficiently improve the network throughput. In this paper, we propose a novel MAC protocol called Contention-Based Prioritized Opportunistic (CBPO) Medium Access Control Protocol. This protocol takes advantage of multiuser diversity, rate adaptation, which utilizes the multi-rate capability offered by IEEE 802.11, and black-burst (BB) contention to access the shared medium in a distributed manner. In particular, rather than simply measuring the channel condition for a node pair in communications each time, with the help of multicast RTS, the candidate users with qualified channel condition are selected and prioritized. Then the qualified receivers contend to send back prioritized clear-to-send message (CTS) with BB, which is a pulse of energy, the duration of which is proportional to the CTS priority. The user with the best channel quality is always selected to send back CTS and receive packets from the sender. Extensive simulation results show that our protocol achieves much better performance than IEEE 802.11 and other auto rate schemes with minimal additional overhead.
Original languageEnglish
Title of host publication2006 IEEE International Conference on Communications, ICC 2006
Number of pages6
Publication statusPublished - 1 Dec 2006
Externally publishedYes
Event2006 IEEE International Conference on Communications, ICC 2006 - Istanbul, Turkey
Duration: 11 Jul 200615 Jul 2006


Conference2006 IEEE International Conference on Communications, ICC 2006


  • Black burst
  • Medium access control (MAC)
  • Multiuser diversity
  • Prioritized CTS
  • Rate adaptation
  • Wireless LANs

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering


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