IEEE 802.15.3 intra-piconet route optimization with application awareness and multi-rate carriers

  • Authors:

  • Zhanping Yin;Victor C. M. Leung

  • Affiliations:

  • University of British Columbia, Vancouver, BC Canada;University of British Columbia, Vancouver, BC Canada

  • Venue:
  • Proceedings of the 2006 international conference on Wireless communications and mobile computing
  • Year:
  • 2006

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Abstract

In IEEE 802.15.3 wireless personal area networks, all devices (DEVs) within a piconet communicate in a peer-to-peer manner. In this paper, we enhance the performance of intra-piconet communications by taking advantage of the multi-rate physical layer (PHY) and diverse application traffic characteristics. As higher PHY data rates are typically achievable over shorter transmission distances, a low rate link between two DEVs can potentially be replaced by a higher rate multihop connection through intermediate DEVs in the same piconet. A novel application-aware shortest path (AASP) algorithm is proposed for centralized intra-piconet route optimization, which finds the route that requires the minimum overall channel time allocation (CTA) based on the traffic parameters. Performance evaluations show that the effective CTA rates vary dramatically for different applications, and can be greatly increased by simply delaying the acknowledgments. Especially for low rate links and between unreachable DEV pairs, the AASP algorithm yields very high optimization ratios, which increase with frame payload size and the density of DEVs in the piconet.