Spectrum efficiency sub-carrier and energy efficiency power allocation for downlink multi-user CoMP in multi-cell system

doi:10.1016/S1005-8885(14)60298-3

Acta Metallurgica Sinica(English letters) ›› 2014, Vol. 21 ›› Issue (3): 29-34.doi: 10.1016/S1005-8885(14)60298-3

• Wireless • Previous Articles Next Articles

Spectrum efficiency sub-carrier and energy efficiency power allocation for downlink multi-user CoMP in multi-cell system

刘锴李屹纪红吴旭光

School of Telecommunication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China

Received:2013-06-14 Revised:2014-01-14 Online:2014-06-30 Published:2014-06-30
Contact: Yi LI E-mail:liyi@bupt.edu.cn
Supported by:
This work was supported by the National Hi-Tech Research and Development Program of China (2012AA01A508).

Abstract

Abstract:

Coordinated multi-point transmission/reception (CoMP) was proposed currently as an effective technology to improve cell-edge throughput in next-generation wireless systems. Most of the existing work discussed clustering methods mostly to maximize the edge user throughput while neglecting the problem of energy efficiency, such as those algorithm clustering base stations (BSs) of better channel condition and BSs of worse channel condition together. In addition, BSs usually increase the transmit power to achieve higher throughput without any considering of interference caused to other users, that may result in energy waste. The authors focus on the throughput maximizing problem while fully considering energy saving problem in CoMP systems. A coefficient is defined to describe the fitness of clusters. Then a sub-carrier allocation algorithm with clustering method is put forward for CoMP downlink, which can save the transmit power of BS and increase the throughput. Furthermore a power allocation scheme is proposed based on non-cooperation game; in which the transmit power is decreased by BSs generally to reach the Nash equation (NE). Simulation shows that the proposed sub-carrier allocation scheme and power allocation algorithm are better than the existing ones on users’ throughput while consumes much less energy.

Key words:

CoMP, energy saving, game theory, power allocation, sub-carrier allocation

CLC Number:

TN929.5

LIU Kai, LI Yi, JI Hong, WU Xu-guang. Spectrum efficiency sub-carrier and energy efficiency power allocation for downlink multi-user CoMP in multi-cell system[J]. Acta Metallurgica Sinica(English letters), 2014, 21(3): 29-34.

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Spectrum efficiency sub-carrier and energy efficiency power allocation for downlink multi-user CoMP in multi-cell system

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