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Investigation of Convergence Mechanisms and Cooperative Power Allocation Algorithms in Heterogeneous Wireless Communication Systems |
Peng Mu-gen; Wang Wen-bo |
Key Laboratory f Universal Wireless Communications, Ministry of Education,
Beijing University of Posts and Telecom. Beijing 100876, China |
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Abstract A cooperative communication and wireless relay techniques based convergence mechanism for the heterogeneous wireless communication system is presented to fulfill the functionalities of convergence and interworking. In order to maximize the capacity of the proposed heterogeneous cooperative network, the utility function based cooperative power allocation strategy is proposed. This paper gives the theoretical optimum model for the power allocation, and presents the detailed cooperative power allocation algorithm different from the conventional “water-filling” algorithm, in which the global optimization is guaranteed under the conditions of equivalent transmission rates between the first and second hops. The simulation results demonstrate that the proposed cooperative power allocation algorithm has a significant performance gain.
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Received: 28 April 2008
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