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Joint power controlled resource allocation scheme for device-to-device communication in heterogeneous cellular networks
LI Zhongjie, XIE Dongpeng
Journal of Computer Applications    2018, 38 (9): 2610-2615.   DOI: 10.11772/j.issn.1001-9081.2018020351
Abstract485)      PDF (889KB)(326)       Save
To solve the interference issue caused by Device-to-Device (D2D) users and small cellular users underlaying macro cellular user resources in heterogeneous cellular networks, a joint power controlled resource allocation scheme was proposed. Firstly, the optimal transmit power of each D2D user and small cell user underlaying macro-cell user channel resources was derived according to the system interference model by satisfying the user Signal to Interference and Noise Ratio (SINR) and transmit power constraints. Secondly, the user's channel selection was programmed as a two-sided matching problem between the user and the channel, and a stable matching solution was obtained by using the Gale-Shapley algorithm. Finally, the matching solution was taken as the initial condition, and the allocation scheme was further optimized by the exchange search algorithm. The simulation results show that the system total capacity and energy efficiency of the proposed scheme are 93.62% and 92.14% of the optimal solution. Compared with stochastic resource allocation scheme, the allocation scheme without power control and exchange search, and the allocation scheme with power control without exchange search, the system capacity averagely increases 48.29%, 15.97% and 4.8% respectively, and the system energy efficiency averagely increases 62.72%, 44.48% and 4.45% respectively. The proposed scheme can achieve approximately optimal system total capacity and effectively improves frequency utilization and energy efficiency.
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