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Advisor(s)
Abstract(s)
WiDom is a wireless prioritized medium access control protocol
which offers very large number of priority levels. Hence, it brings the potential
to employ non-preemptive static-priority scheduling and schedulability analysis
for a wireless channel assuming that the overhead of WiDom is modeled
properly. Recent research has created a new version of WiDom (we call it:
Slotted WiDom) which offers lower overhead compared to the previous
version. In this paper we propose a new schedulability analysis for slotted
WiDom and extend it to work for message streams with release jitter.
Furthermore, to provide an accurate timing analysis, we must include the effect
of transmission faults on message latencies. Thus, in the proposed analysis we
consider the existence of different noise sources and develop the analysis for
the case where messages are transmitted under noisy wireless channels.
Evaluation of the proposed analysis is done by testing the slotted WiDom in
two different modes on a real test-bed. The results from the experiments
provide a firm validation on our findings.
Description
Keywords
Real-time systems Fixed-priority scheduling Medium access control protocol Wireless communications