Improved resource allocation strategy in SU-CoMP network  

作　　者：CHEN Xin XU Xiao-dong LI Hong-jia TAO Xiao-feng Tommy Svensson Carmen Botella 

机构地区：[1]Wireless Technology Innovation Institute, Key Laboratory of Universal Wireless Communication, Ministry of Education, Beijing University of Posts and Telecommunications, Beijing 100876, China [2]Signal and Systems, Chalmers University of Technology, SE-412-96 Goteborg, Sweden

出　　处：《The Journal of China Universities of Posts and Telecommunications》2011年第4期7-12,共6页中国邮电高校学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (61001116);State Emphasis Special Project 2009ZX03003-011-02;the Hi-Tech Research and Development Program of China (2009AA011506);International Scientific and Technological Cooperation Program (2010DFA11060)

摘　　要：Coordinated multi-point transmission and reception （CoMP） for single user, named as SU-CoMP, is considered as an efficient approach to mitigate inter-cell interference in orthogonal frequency division multiple access （OFDMA） systems. Two prevalent approaches in SU-CoMP are coordinated scheduling （CS） and joint processing （JP）. Although JP in SU-CoMP has been proved to achieve a great link performance improvement for the cell-edge user, efficient resource allocation （RA） on the system level is quite needed. However, so far limited work has been done considering JP, and most existing schemes achieved the improvement of cell-edge performance at cost of the cell-average performance degradation compared to the single cell RA. In this paper, a two-phase strategy is proposed for SU-CoMP networks. CS and JP are combined to improve both cell-edge and cell-average performance. Compared to the single cell RA, simulation results demonstrate that, the proposed strategy leads to both higher cell-average and cell-edge throughput.Coordinated multi-point transmission and reception （CoMP） for single user, named as SU-CoMP, is considered as an efficient approach to mitigate inter-cell interference in orthogonal frequency division multiple access （OFDMA） systems. Two prevalent approaches in SU-CoMP are coordinated scheduling （CS） and joint processing （JP）. Although JP in SU-CoMP has been proved to achieve a great link performance improvement for the cell-edge user, efficient resource allocation （RA） on the system level is quite needed. However, so far limited work has been done considering JP, and most existing schemes achieved the improvement of cell-edge performance at cost of the cell-average performance degradation compared to the single cell RA. In this paper, a two-phase strategy is proposed for SU-CoMP networks. CS and JP are combined to improve both cell-edge and cell-average performance. Compared to the single cell RA, simulation results demonstrate that, the proposed strategy leads to both higher cell-average and cell-edge throughput.

关 键 词：OFDMA system SU-CoMP RA binary power allocation based multi-cell coordinated proportional fair scheduling （BP-CPF） sub-channels assignment forjoint processing （JP-SA） 

分 类 号：TP393[自动化与计算机技术—计算机应用技术] F279.711[自动化与计算机技术—计算机科学与技术]