Joint multicast beamforming and admission control

E. Matskani, N. D. Sidiropoulos, Z. Q. Luo, L. Tassiulas

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Scopus citations

Abstract

Wireless multicasting is quickly emerging as an important enabling technology for mass content distribution to mobile hand-held devices. With channel state information at the transmitter, it is possible to tailor transmissions by selective beamforming towards specific user groups, thereby harnessing the wireless 'broadcast advantage' and managing co-channel interference. Wireless (physical layer) multicasting options are currently being debated in the emerging UMTS-LTE standard. A key problem in this context is admission control: it is often infeasible or impractical to serve all subscribers from a single access point, due to mutual interference or power limitations. This paper considers the joint multicast beamforming and admission control problem, aiming to maximize the number of subscribers that can be served and minimize the power required to serve them. The joint problem is NP-hard, yet suitable reformulation reveals that it can be naturally relaxed to a semidefinite program (SDP), leading to an approximation by deflation over SDP. Experimental results using measured channels indicate that the proposed approximation approach is fast and efficient.

Original languageEnglish (US)
Title of host publication2007 2nd IEEE International Workshop on Computational Advances in Multi-Sensor Adaptive Processing, CAMPSAP
Pages189-192
Number of pages4
DOIs
StatePublished - Dec 1 2007
Event2007 2nd IEEE International Workshop on Computational Advances in Multi-Sensor Adaptive Processing, CAMPSAP - St. Thomas, Virgin Islands, U.S.
Duration: Dec 12 2007Dec 14 2007

Publication series

Name2007 2nd IEEE International Workshop on Computational Advances in Multi-Sensor Adaptive Processing, CAMPSAP

Other

Other2007 2nd IEEE International Workshop on Computational Advances in Multi-Sensor Adaptive Processing, CAMPSAP
Country/TerritoryVirgin Islands, U.S.
CitySt. Thomas
Period12/12/0712/14/07

Keywords

  • Admission control
  • Multicasting
  • Transmit beamforming
  • UMTS-LTE

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