CoMP-transm ission-based energy-efficient scheme selection algorithm for LTE-A system s
Tong En1Gong Shulei2Pan Zhiwen1You Xiaohu1
【摘 要】Abstract：In order to achieve higher system energy efficiency（EE），a new coordinated multipoint（CoMP）-transmissionbased scheme selection energy saving（CTSES）algorithm is proposed for downlink homogeneous cellular networks．The problem is formulated as an optimization of maximizing system EE，under the constraints of the data rate requirement and themaximum transmit power．The problem is decomposed into power allocation and alternative scheme selection problems．Optimal power allocation is calculated for CoMP-JT（joint transmission）and CoMP-CS（coordinated scheduling）transmissions，and the scheme w ith higher EE is chosen．Since the optimal problem is a nonlinear fractional optimization problem for both CoMP transmission schemes，the problem is transformed into an equivalent problem using the parametric method．The optimal transmit power and optimal EE are obtained by an iteration algorithm in CoMP-JT and CoMP-CS schemes．Simulation results show that the proposed algorithm offers obvious energy-saving potential and outperforms the fixed CoMP transm ission scheme．Under the condition of the same maximum transmit power limit，the empirical regularity of user distribution for scheme choice is presented，and using this regularity，
LTE-A 系统中基于 CoMP 传输模式选择的节能算法
