femtocell双层网络中基于分簇的资源分配

摘要

针对异构网络中毫微微小区(femtocell)之间的同层干扰和femtocell与宏小区(macrocell)之间的跨层干扰,提出一种基于分簇的资源管理方案.该方案包括两部分:第1部分是宏基站(macrocell base station,MBS)利用三轮子信道分配算法为宏用户分配子信道,再采用注水算法分配功率;第2部分首先采用遗传模拟退火算法为femtocell分簇,再利用启发式算法和卡罗需-库恩-塔克(Karush-Kuhn-Tucker,KKT)条件为毫微微用户分别分配子信道和功率.仿真结果表明,该方案有效地抑制了网络中的这两种干扰,满足了用户的数据速率需求,有效地提高了频谱效率.%To mitigata the co-tier interference among femtocells and the cross-tier interference between femtocell and macrocell in the heterogeneous network, a cluster-based resource management scheme is proposed.The proposed scheme includes two parts: in the first part, the three-round subchannel allocation algorithm is adopted to assign subchannel to the macro users, then the power is allocated in water-filling fashion.In the other part, femtocells are divided into disjoint groups by improved genetic simulated annealing algorithm, and then femtocells perform subchannel and power allocation by heuristic algrithm and Karush-Kuhn-Tucker condition.Simulation results show that the proposed scheme suppresses effectively that two interference, not only satisfies the data rate requirements of users, but also improves the spectrum efficiency.