A Delay-Sensitive Multicast Protocol for Network Capacity Enhancement in Multirate MANETs

Yu Hsun Chen, Chia Cheng Hu, Eric Hsiao Kuang Wu, Shu Min Chuang, Gen Huey Chen

Research output: Contribution to journalArticlepeer-review

29 Scopus citations


Due to significant advances in wireless modulation technologies, some MAC standards such as 802.11a, 802.11b, and 802.11g can operate with multiple data rates for QoS-constrained multimedia communication to utilize the limited resources of MANETs more efficiently. In this paper, by means of measuring the busy/idle ratio of the shared radio channel, a method for estimating one-hop delay is first suggested. Then, by constructing a multicast tree, a delay-sensitive multicast protocol for real-time applications in multirate MANETs is proposed. In order to increase the network capacity, the proposed multicast protocol intends to minimize the sum of the total transmission time of the forwarders and the total blocking time of the blocked hosts, by taking the neighboring information of the forwarders into account and properly adjusting the data rates of the forwarders. Simulation results show that the proposed delay estimation method is more accurate, as compared with previous works. Besides, the proposed multicast protocol can induce higher network capacity, while satisfying the delay requirement.

Original languageEnglish
Pages (from-to)926-937
Number of pages12
JournalIEEE Systems Journal
Issue number1
StatePublished - Mar 2018


  • Delay-sensitive protocol
  • IEEE 802.11
  • QoS
  • multicast
  • multirate MANET
  • network capacity


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