Cross-Layer Algorithms for QoS Enhancement in Wireless Multimedia Sensor Networks

Navrati SAXENA  Abhishek ROY  Jitae SHIN  

IEICE TRANSACTIONS on Communications   Vol.E91-B   No.8   pp.2716-2719
Publication Date: 2008/08/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e91-b.8.2716
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Network
cross-layer,  wireless multimedia sensor networks,  QoS,  

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A lot of emerging applications like advanced telemedicine and surveillance systems, demand sensors to deliver multimedia content with precise level of QoS enhancement. Minimizing energy in sensor networks has been a much explored research area but guaranteeing QoS over sensor networks still remains an open issue. In this letter we propose a cross-layer approach combining Network and MAC layers, for QoS enhancement in wireless multimedia sensor networks. In the network layer a statistical estimate of sensory QoS parameters is performed and a near-optimal genetic algorithmic solution is proposed to solve the NP-complete QoS-routing problem. On the other hand the objective of the proposed MAC algorithm is to perform the QoS-based packet classification and automatic adaptation of the contention window. Simulation results demonstrate that the proposed protocol is capable of providing lower delay and better throughput, at the cost of reasonable energy consumption, in comparison with other existing sensory QoS protocols.