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Adaptive Cross Layer Approach for Video Transmission Over Cognitive UWB Network

Authors:
Norazizah Mohd Aripin
Norsheila Fisal
Rozeha A. Rashid
Anthony C.C. Lo

Keywords: cross-layer design; cognitive UWB network; video transmission

Abstract:
The demand of quality of service (QoS) for multimedia transmission over wireless network raises huge challenges such as time-varying channel conditions, limited resources, tight delay constraints, high bandwidth demand and complex protocol design. Therefore, there is need to efficiently utilize and manage the interactions among different layers of the protocol stack using cross layer design (CLD) approach in order to provide necessary support for video applications. This paper presents our proposed strategies for adaptive video transmission over Cognitive Ultra Wideband (C-UWB) network using MAC centric CLD approach. Generally, the proposed MAC centric CLD framework consists of sensing module, adaptive resource allocation module and adaptive quantization scale module. Two techniques are proposed namely; Basic CLD (B_CLD) and Enhanced CLD (E_CLD). In the B_CLD, the decision strategies to stream video packets over C-UWB network are based on the pre-determined thresholds. On the other hence, decision strategies in E_CLD are based on Lagrange optimization, which is implemented in the packet reception rate (PRR) based resource allocation scheme and adaptive quantization scale. Simulation results showed that the proposed E_CLD scheme has significantly improved the video quality when compared to the Basic CLD scheme and the non-CLD scheme.

Pages: 163 to 168

Copyright: Copyright (c) IARIA, 2011

Publication date: June 19, 2011

Published in: conference

ISSN: 2308-4219

ISBN: 978-1-61208-140-3

Location: Luxembourg City, Luxembourg

Dates: from June 19, 2011 to June 24, 2011