NDLI: Towards jamming-resistant and competitive medium access in the SINR model

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Towards jamming-resistant and competitive medium access in the SINR model

Towards jamming-resistant and competitive medium access in the SINR model

Content Provider	ACM Digital Library
Author	Richa, Andrea Schmid, Stefan Zhang, Jin Scheideler, Christian
Abstract	The efficient coordination of medium access is arguably one of the most relevant applications of distributed computing. Recently, progress has been made in the design of robust medium access (MAC) protocols that guarantee a competitive throughput against a powerful jammer which can block the medium an arbitrary constant fraction (1-ε) of the time. These MAC protocols exploit the remaining ε-fraction optimally in the sense that a significant part is used for successful transmissions. However, so far these throughput guarantees only hold for rather simplistic interference models such as Unit Disk Graphs. This paper reports on our first insights on the design of a robust medium access protocol SINRMAC for the more realistic physical interference model which takes into account the signal to interference plus noise ratio (SINR) at the receiver. This model is more difficult, as there is no longer an objective distinction of idling and busy time periods which can be used to dynamically adjust the wireless nodes' backoff periods. We discuss an approach that introduces individual "idle/busy thresholds" which are adapted dynamically and, unlike the multiplicative backoff periods, in an additive manner. We find that a reasonable convergence speed (and throughput) can be achieved if there exists some meaningful upper bound τ on the noise level in the network; surprisingly, however, our first simulation results indicate that adaptive changes of the idly/busy thresholds do not yield a better throughput than static thresholds set to τ.
Starting Page	33
Ending Page	36
Page Count	4
File Format	PDF
ISBN	9781450308687
DOI	10.1145/2030686.2030697
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2011-09-19
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Wireless Medium access Interference Distributed control Throughput Sinr Jamming
Content Type	Text
Resource Type	Article

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