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  • Research Article
  • Open Access

Further Development of Synchronous Array Method for Ad Hoc Wireless Networks

EURASIP Journal on Advances in Signal Processing20082009:873202

  • Received: 1 February 2008
  • Accepted: 22 July 2008
  • Published:


A further development of the synchronous array method (SAM) as a medium access control scheme for large-scale ad hoc wireless networks is presented. Under SAM, all transmissions of data packets between adjacent nodes are synchronized on a frame-by-frame basis, and the spacing between concurrent cochannel transmissions of data packets is properly controlled. An opportunistic SAM (O-SAM) is presented which allows concurrent cochannel transmissions to be locally adaptive to channel gain variations. A distributed SAM (D-SAM) is discussed that schedules all concurrent cochannel transmissions in a distributed fashion. For networks of low mobility, the control overhead required by SAM can be made much smaller than the payload. By analysis and simulation, the intranetwork throughput of O-SAM and D-SAM is evaluated. The effects of traffic load and multiple antennas on the intranetwork throughput are studied. The throughput of ALOHA is also analyzed and compared with that of O-SAM and D-SAM. By a distance-weighted throughput, a comparison of long distance transmission versus short distance transmission is also presented. The study of D-SAM reveals an important insight into the MSH-DSCH protocol adopted in IEEE 802.16 standards.


  • Wireless Network
  • Access Control
  • Quantum Information
  • Medium Access Control
  • Data Packet

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Authors’ Affiliations

Department of Electrical Engineering, University of California, Riverside, CA 92521, USA
Cinea, Inc., 16 S. 17th Street, Richmond, VA 23219, USA


© Yuan Yu et al. 2009

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.