Dynamic subcarrier and power allocation based on cooperative game theory in symmetric cooperative OFDMA networks

• Published in: Journal of China universities of posts and telecommunications Vol. 18; no. 2; pp. 9 - 16
• Main Authors: LIU, Wei, LUO, Tao, YUE, Guang-xin
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.04.2011; Key Laboratory of Universal Wirreless Communication, Ministry of Education, Beijing University of Posts and Telecommunications, Beijing 100876, China
• Subjects: Allocations; Channels; Computer simulation; Computing time; cooperative relay; Dynamical systems; Dynamics; fairness; NBS; Networks; OFDMA; radio resource allocation; Subcarriers; 功率分配; 博弈理论; 合作; 国家统计局; 子载波分配; 对称; 正交频分多址接入; fairness; OFDMA; radio resource allocation; cooperative relay; NBS
• ISSN: 1005-8885
• DOI: 10.1016/S1005-8885(10)60039-8

In order to improve the efficiency and fairness of radio resource utilization,a scheme of dynamic cooperative subcarrier and power allocation based on Nash bargaining solution（NBS-DCSPA） is proposed in the uplink of a three-node symmetric cooperative orthogonal frequency division multiple access（OFDMA） system.In the proposed NBS-DCSPA scheme,resource allocation problem is formulated as a two-person subcarrier and power allocation bargaining game（SPABG） to maximize the system utility,under the constraints of each user＇s maximal power and minimal rate,while considering the fairness between the two users.Firstly,the equivalent direct channel gain of the relay link is introduced to decide the transmission mode of each subcarrier.Then,all subcarriers can be dynamically allocated to the two users in terms of their selected transmission mode.After that,the adaptive power allocation scheme combined with dynamic subcarrier allocation is optimized according to NBS.Finally,computer simulation is conducted to show the efficiency and fairness performance of the proposed NBS-DCSPA scheme.