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A new adaptive receiver-initiated scheme for mitigating starvation in wireless networks

Authors
Journal
Ad Hoc Networks
1570-8705
Publisher
Elsevier
Volume
11
Issue
2
Identifiers
DOI: 10.1016/j.adhoc.2011.09.005
Keywords
  • Mac
  • Csma/Ca
  • Receiver-Initiated
  • Evaluation
  • Wireless
  • Starvation
  • Simulation
Disciplines
  • Mathematics

Abstract

Abstract Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) has been adopted by the IEEE 802.11 standard and provides good performance when all transmitters are within the range of each other. Unfortunately, in multi-hop topologies, the asymmetric view of the channel state leads to a throughput distribution where a few flows may capture all the available bandwidth while many other flows get very low throughput and sometime meet starvation. To address this problem, in this paper we describe a solution called Carrier Sense Multiple Access with Collision Avoidance by Receiver Detection (CSMA/CARD) which makes use of collisions sensed by a receiver at the physical layer to help the handshake mechanism and mitigate the effect of such problem. More specifically, we propose a mechanism based on historical observations, where collisions can be used by the receiver to predict whether some sender attempted to initiate a transmission. The receiver then reacts accordingly by participating itself in a handshake sequence. We show some interesting results, obtained through analysis and simulations, when the CSMA/CARD is compared to the IEEE 802.11 protocol.

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