Opportunistic multicast scheduling for information streaming in cellular networks

Jung Tsung Tsai*, Rene L. Cruz


研究成果: 雜誌貢獻期刊論文同行評審

5 引文 斯高帕斯(Scopus)


We investigate opportunistic multicast scheduling schemes for sending a multicast stream in a wireless cell. We propose schemes that exploit both multiuser diversity and broadcast gains for efficient multicast, preserve the feature of synchronization of served information provided by conventional multicasting, and provide for receivers accepting sequential stream data. With knowledge of the expected sequence number (SN) of stream data and the feasible peak transmission rate for each group member, our scheme decouples the pairing of SN and rate and selects an expected SN and a peak rate that jointly maximize a utility function. Besides the amount of data accepted in one transmission, the function includes a force factor to push expected SNs to drift closely and another force factor to synchronize more expected SNs. Under i.i.d. channel conditions, we show that with the two factors to limit the diffusion of expected SNs, multicast throughput significantly increases and that without them our scheme degenerates into merely tapping multiuser diversity gain. Furthermore, we investigate optimal transmit power allocation subject to an average power constraint for multicast transmission. Results show that multicast throughput increases slightly for our scheme but substantially for traditional ones.

頁(從 - 到)1776-1785
期刊IEEE Transactions on Wireless Communications
出版狀態已發佈 - 2011 6月

ASJC Scopus subject areas

  • 電腦科學應用
  • 電氣與電子工程
  • 應用數學


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