CAJ | 학술논문

为了有效提升系统能量效率，提出下行同构网络中基于多点协作传输模式选择的节能算法。在考虑用户速率需求和系统发射功率限制条件前提下构建以最大化系统能效为目标函数的最优化问题。将目标问题分解成功率优化和模式选择2个子问题：首先计算 CoMP-JT 和 CoMP-CS 传输模式下的功率分配矩阵，然后选择能量效率较高的模式作为当前的传输模式。功率优化子问题是非线性分数优化问题，运用参数化方法将其转化为等效凸问题，在 CoMP-JT 和 CoMP-CS 下分别通过迭代算法求解最优功率和能效。仿真结果证实了所提方案具有明显的节能潜力，其系统能效优于固定 CoMP 模式。此外，还总结了相同最大发射功率限制条件下的模式选择规律，运用该规律可大大减少此类场景下的计算复杂度。
위료유효제승계통능량효솔，제출하행동구망락중기우다점협작전수모식선택적절능산법。재고필용호속솔수구화계통발사공솔한제조건전제하구건이최대화계통능효위목표함수적최우화문제。장목표문제분해성공솔우화화모식선택2개자문제：수선계산 CoMP-JT 화 CoMP-CS 전수모식하적공솔분배구진，연후선택능량효솔교고적모식작위당전적전수모식。공솔우화자문제시비선성분수우화문제，운용삼수화방법장기전화위등효철문제，재 CoMP-JT 화 CoMP-CS 하분별통과질대산법구해최우공솔화능효。방진결과증실료소제방안구유명현적절능잠력，기계통능효우우고정 CoMP 모식。차외，환총결료상동최대발사공솔한제조건하적모식선택규률，운용해규률가대대감소차류장경하적계산복잡도。
In order to achieve higher system energy efficiency (EE),a new coordinated multipoint (CoMP)-transmission-based 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 the maximum 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 with 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 transmission 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, the computational complexity can be reduced.