April 2016
Intermediate to advanced
538 pages
20h 50m
English
Content preview from Mobile Ad Hoc Networks
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440 ◾ Mobile Ad Hoc Networks: Current Status and Future Trends
As compared to the per-hop RTT and PktPair, ETX introduces less overhead to the network as
the probes are broadcasts rather than unicasts. Moreover, as broadcasts, the probes do not require
acknowledgment.
16.7.4 Expected Transmission Time and Variants
Expected transmission time (ETT) and its path variant weighted cumulative ETT (WCETT) are
an extension of ETX; they were proposed in [27] as part of the multi-radio link-quality source
routing (MR-LQSR) protocol. ETT enhances ETX by taking packet length into consideration.
ETT is calculated as a “bandwidth-adjusted ETX” and it incor ...
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