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Soft Real-Time Chains for Multi-Hop Wireless Ad-Hoc Networks

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5 Author(s)
Bui, B.D. ; Dept. of Comput. Sci., Illinois Univ., Urbana, IL ; Pellizzoni, R. ; Caccamo, M. ; Cheah, C.F.
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Prioritized MAC protocols are needed to support soft real-time communication in wireless networks. In this paper, we introduce real-time chain, a new prioritized MAC protocol to support soft real-time data flows in multi-hop wireless ad-hoc networks. By avoiding packet collisions and limiting the effect of priority inversions, real-time chain is able to provide soft real-time and bandwidth guarantees. Furthermore, the use of multiple channels enables high spatial reuse and transmission rates. Finally, our approach can be integrated with a slightly modified version of the IEEE 802.15.4 standard. The protocol has been fully implemented on Crossbow MICAz hardware and its performance has been validated with a large set of both indoor and outdoor experiments

Published in:

Real Time and Embedded Technology and Applications Symposium, 2007. RTAS '07. 13th IEEE

Date of Conference:

3-6 April 2007