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Optimization scheme with pre-processing for cooperative relay multicast networks in cellular system 被引量:1
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作者 wang cheng-jin li xi zhang lin ji hong 《The Journal of China Universities of Posts and Telecommunications》 EI CSCD 2011年第3期16-21,共6页
For cooperative relay multicast networks, the general cross-layer optimization approaches converge to the global optimal value slowly because of the large quantity of relay terminals. However, the mobility of relay te... For cooperative relay multicast networks, the general cross-layer optimization approaches converge to the global optimal value slowly because of the large quantity of relay terminals. However, the mobility of relay terminals requires quick converging optimization strategies to refresh the relay links frequently. Based on the capacity analysis of multiple relay channels, an improved cross-layer optimization scheme is proposed to resolve this problem, in which the bound of the relay selecting region is determined as a pre-processing. Utilizing the primal-dual algorithm, a cross-layer framework with pre-processing optimizes both the relay terminal selection and power allocation with quick convergence. The simulation results prove the effectiveness of the proposed algorithm. 展开更多
关键词 cooperative relay cross-layer optimization PRE-PROCESSING MULTICAST
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