One objective of the Task group WP3b5 of the PULSERS project in framework FP6 is to suggest a medium access (MAC) layer for a sensor network. The performance of this MAC layer depends on physical layer (PHY) properties. A reliable performance characterization of the MAC requires a joint evaluation of PHY and MAC. In this work, both a suitable PHY and a MAC layer are proposed. Essentially, the PHY layer comprises packet-oriented transmission of 2PPM UWB signals and noncoherent reception. The MAC layer performs random channel access of uncoordinated transmitters, implying the presence of multiuser interference. A semi-deterministic model of the PHY layer is developed, which considers multiuser interference in an accurate fashion and is suited as a part of an efficient PHY-MAC cross layer simulator.
By: Martin Weisenhorn
Published in: RZ3595 in 2005
LIMITED DISTRIBUTION NOTICE:
This Research Report is available. This report has been submitted for publication outside of IBM and will probably be copyrighted if accepted for publication. It has been issued as a Research Report for early dissemination of its contents. In view of the transfer of copyright to the outside publisher, its distribution outside of IBM prior to publication should be limited to peer communications and specific requests. After outside publication, requests should be filled only by reprints or legally obtained copies of the article (e.g., payment of royalties). I have read and understand this notice and am a member of the scientific community outside or inside of IBM seeking a single copy only.
Questions about this service can be mailed to reports@us.ibm.com .