Title: Adaptive resource allocation in multiuser cooperative networks with proportional rate constraints
Authors: Funian Li
Addresses: Department of Electronics and Information Engineering, Wuhan University of Science and Technology, Wuhan, China
Abstract: In this paper, the uplink scenario of multi-user cooperative network is considered, in which the resource is allocated to the users with the balance of the trade-off between system capacity and user fairness. Proportional fairness was considered, which imposed a set of nonlinear constraints into the optimisation problem. We show that the optimisation problem is formulated as a mixed binary integer programming problem, which is hard to find the global optimum in terms of computational complexity. For practise implementation, we decomposed the optimisation problem into two sub-problems of opportunistic relaying strategy and power allocation. First, the opportunistic relay selection strategy is given by making use of the equivalent channel power gain. Second, a low-complexity power allocation scheme is proposed. The simulation result shows that the proposed scheme can both improve the system throughput and ensure the fairness.
Keywords: cooperative communication; resource allocation; proportional fairness; relay selection; power allocation; cooperative networks; proportional rate constraints; system capacity; user fairness; optimisation; simulation; system throughput.
International Journal of Sensor Networks, 2011 Vol.10 No.1/2, pp.104 - 110
Received: 23 Mar 2010
Accepted: 30 Sep 2010
Published online: 26 Jun 2011 *