异构网中载波聚合系统的成员载波选择和干扰协同

为了解决下一代演进移动通信系统在异构网场景由于低功率基站在高功率基站覆盖区域的随意分布而导致的小区间干扰问题及容量速率限制,提出了一种载波聚合系统的成员载波选择和干扰协同方法。该方法基于修正的载波公平比例准则,动态地在小区间协同选择成员载波。为了进一步提高低功率节点的系统容量,设计了新的基于调和平均数的用户小区选择准则及算法。仿真结果表明,与频率复用因子为1的系统相比,设计的方法由于静默了部分高功率节点用户成员载波,从而使低功率节点用户获得更多的选择机会,可提高低功率节点小区的容量。

Interference coordination by component carrier selection for carrier aggregation system in heterogeneous networks

The evolved next generation wireless system with frequency reuse one s uffers from the performance loss due to the interference between Macro cell and Pico cell in heterogeneous networks. This paper presents interference coordinati on scheme by component carrier selection that dynamically selects the component carrier coordinately among the cells in the carrier aggregation system. The sche me reserves the proper portion of carriers during which the Macro nodes are part ially deactivated allowing the users of Pico cell to be served with lower interf erence. To further improve the cell-edge performance, new user cell association by the harmonic mean rate metric is also proposed. Simulation results show that the proposed scheme can achieve high cell-average and cell-edge throughput for the Pico cell in the heterogeneous networks.