Dynamic subcarrier and power allocation based on cooperative game theory in symmetric cooperative OFDMA networks |
| |
Authors: | LIU Wei LUO Tao YUE Guang-xin |
| |
Affiliation: | Key Laboratory of Universal Wirreless Communication, Ministry of Education, Beijing University of Posts and Telecommunications, Beijing 100876, China |
| |
Abstract: | 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. |
| |
Keywords: | cooperative relay OFDMA radio resource allocation NBS fairness |
本文献已被 CNKI 维普 万方数据 等数据库收录! |
|