tailieunhanh - Báo cáo hóa học: " Research Article Optimal and Fair Resource Allocation for Multiuser Wireless Multimedia Transmissions"

Research Article Optimal and Fair Resource Allocation for Multiuser Wireless Multimedia Transmissions | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2009 Article ID801613 10 pages doi 2009 801613 Research Article Optimal and Fair Resource Allocation for Multiuser Wireless Multimedia Transmissions Zhangyu Guan Dongfeng Yuan and Haixia Zhang Wireless Mobile Communications and Transmission Laboratory. WMCT Shandong University Jinan 250100 China Correspondence should be addressed to Dongfeng Yuan dfyuan@ Received 30 June 2008 Revised 18 December 2008 Accepted 20 February 2009 Recommended by Kwang-Cheng Chen This paper presents an optimal and fair strategy for multiuser multimedia radio resource allocation RRA based on coopetition which suggests a judicious mixture of competition and cooperation. We formulate the co-opetition strategy as sum utility maximization at constraints from both Physical PHY and Application APP layers. We show that the maximization can be solved efficiently employing the well-defined Layering as Optimization Decomposition LOD method. Moreover the coopetition strategy is applied to power allocation among multiple video users and evaluated through comparing with existing- competition based strategy. Numerical results indicate that the co-opetition strategy adapts the best to the changes of network conditions participating users and so forth. It is also shown that the coopetition can lead to an improved number of satisfied users and in the meanwhile provide more flexible tradeoff between system efficiency and fairness among users. Copyright 2009 Zhangyu Guan et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 1. Introduction Radio resource allocation RRA for multimedia services has drawn a lot of attention because of its capability of offering an efficient way to handle the resources. In previous research much attention