Acta Metallurgica Sinica(English letters) ›› 2011, Vol. 18 ›› Issue (2): 9-16.doi: 10.1016/S1005-8885(10)60039-8

• Networks • 上一篇    下一篇

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

刘蔚1,罗涛2   

  1. 1. 北京邮电大学
    2. 北京邮电大学电信工程学院
  • 收稿日期:2010-12-13 修回日期:2011-03-08 出版日期:2011-04-30 发布日期:2011-04-15
  • 通讯作者: 刘蔚 E-mail:wayyne.liu@gmail.com
  • 基金资助:

    国家自然科学基金;973计划;国家重大科学专项

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

  • Received:2010-12-13 Revised:2011-03-08 Online:2011-04-30 Published:2011-04-15
  • Contact: Wei Liu E-mail:wayyne.liu@gmail.com
  • Supported by:

    ; the 973 Project;National Great Science Specific Project

摘要:

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.

关键词:

cooperative relay, OFDMA, radio resource allocation, NBS, fairness

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.

Key words:

cooperative relay, OFDMA, radio resource allocation, NBS, fairness