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Performance analysis of multipath transmission over 802.11-based multihop ad hoc networks: a cross-layer perspective

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3 Author(s)
Zhao, L. ; Sch. of Electr. Eng. & Comput. Sci., Washington State Univ., Pullman, WA ; Delgado-Frias, J.G. ; Sivakumar, K.

Data transmission in ad hoc networks involves interactions between medium access control (MAC)-layer protocols and data forwarding along network-layer paths. These interactions have been shown to have a significant impact on the performance of a system. This impact on multipath data transmission over multihop IEEE 802.11 MAC-based ad hoc networks is assessed; analysis is from a cross-layer perspective. Both MAC layer protocols and network-layer data forwarding are taken into account in the system models. The frame service time at source in a 802.11 MAC-based multipath data transmission system under unsaturated conditions is studied. Analytical models are developed for two packet generation schemes (round robin and batch) with a Poisson frame arrival process. Moreover, an analytical model is developed to investigate the throughput of a multipath transmission system in 802.11-based multihop wireless networks. Two methods are proposed to estimate the impact of cross-layer interactions on the frame service time in such a system. Two bounds of the system throughput are obtained based on these estimation methods. These models are validated by means of simulation under various scenarios.

Published in:

Communications, IET  (Volume:2 ,  Issue: 2 )