Joint power minimization in wireless relay channels

Pak Tao Lau, Shuguang Cui

Research output: Journal article publicationJournal articleAcademic researchpeer-review

36 Citations (Scopus)


Energy-constrained multihop wireless links are considered, where the total power consumption is minimized under given requirements on the end-to-end bit error rate (BER). As multihop transmissions are known to be able to save transmission energy in a wireless environment, we study the optimal power scheduling schemes over intermediate hops when the source-relays-destination link can be modeled as cascaded binary symmetric channels. The problem is formulated with an end-to-end BER constraint, and the resulting power consumption is compared with that of the individual link requirement strategy where each hop assigns power under a per-link BER constraint. Results show that the proposed joint power scheduling strategy can achieve a maximum power reduction factor of M in an M-hop route.
Original languageEnglish
Pages (from-to)2820-2824
Number of pages5
JournalIEEE Transactions on Wireless Communications
Issue number8
Publication statusPublished - 1 Aug 2007
Externally publishedYes


  • End-to-end BER
  • Joint power minimization
  • Relay channel

ASJC Scopus subject areas

  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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