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采用了一种新的增强干扰协调(eICIC)来管理ABS子帧,该eICIC综合利用时域、频域以及功率调节来提高系统资源利用率.特别地,考虑了一种Pico小区部署在Macro小区中心附近的2层非均匀异构网络,并且每个Pico小区的用户个数各不相同.为了减轻同频信道部署所带来的干扰,Macro小区使用LP-ABS,并将ABS时隙的资源块划分为2部分,一部分只给Macro小区使用,另一部分只给Pico小区使用.允许不同的Macro小区在LP-ABS时隙保留不同比率的频带资源以及不同的发送功率用于传输.综合考虑了用户连接、资源分配、ABS比率、频域划分参数以及Macro小区在LP-ABS时隙的发送功率,其目标为最大化系统比例公平效用,并且提出一种迭代算法求解.仿真结果表明,该算法相比于现有方案在提高系统吞吐量的同时还保证了用户的公平性.
A new eICIC is adopted to manage the ABS subframes, and the eICIC uses the time domain, the frequency domain and the power adjustment to improve system resource utilization.In particular, a Pico cell is deployed in a Macro cell Center in the vicinity of the 2-layer heterogeneous heterogeneous network, and the number of users in each Pico cell varies.In order to reduce the interference caused by intra-frequency channel deployment, the Macro cell uses LP-ABS and allocates resources of the ABS slot The block is divided into two parts, one for the Macro cell only and the other for the Pico cell only. Different macro cells are allowed to reserve different ratios of bandwidth resources and different transmit power for transmission in the LP-ABS slot. User connection, resource allocation, ABS ratio, frequency domain partitioning parameters and transmission power of the Macro cell in the LP-ABS slot, the objective is to maximize the system fairness utility and to propose an iterative algorithm to solve the problem.The simulation results show that the algorithm Compared with the existing programs to improve system throughput while also ensuring the fairness of users.