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Implementation of a dominance protocol for wireless medium access
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Consider the problem of scheduling sporadic message
transmission requests with deadlines. For wired
channels, this has been achieved successfully using the
CAN bus. For wireless channels, researchers have
recently proposed a similar solution; a collision-free
medium access control (MAC) protocol that implements
static-priority scheduling. Unfortunately no
implementation has been reported, yet. We implement and
evaluate it to find that the implementation indeed is
collision-free and prioritized. This allows us to develop
schedulability analysis for the implementation. We
measure the response times of messages in our
implementation and find that our new response-time
analysis indeed offers an upper bound on the response
times. This enables a new class of wireless real-time
systems with timeliness guarantees for sporadic messages
and it opens-up a new research area: schedulability
analysis for wireless networks.
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IEEE