An adaptive resource control mechanism in multi-hop ad-hoc networks

Authors:
Yimeng Yang;Geert Heijenk;Boudewijn R. Haverkort
Affiliations:
CTIT, University of Twente, Enschede, The Netherlands;CTIT, University of Twente, Enschede, The Netherlands;CTIT, University of Twente, Enschede, The Netherlands and Embedded Systems Institute, Eindhoven, The Netherlands
Venue:
WWIC'11 Proceedings of the 9th IFIP TC 6 international conference on Wired/wireless internet communications
Year:
2011

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Abstract

This paper presents an adaptive resource control mechanism for multihop ad-hoc network systems, which avoids bottleneck problems caused by the node-fairness property of IEEE 802.11. In our proposal, the feedback information from the downstream bottleneck, derived from Request-To-Send (RTS) and Clear-To-Send (CTS) messages is utilized to control the Transmission Opportunity (TXOP) limit of the upstream nodes for traffic balancing. The proposed mechanism is modelled control-theoretically using the 20-sim control system modelling tool, which has the advantage that results can be obtained in a fast and efficient way. Compared to systems without resource control, a higher throughput and lower delay can be achieved under a variety of traffic load conditions as well as in dynamic network environments.