一种异构网的高能效基站休眠方法

Energy-Efficient Base Station Sleep Method in Heterogeneous Networks

为适应移动业务需求改变,充分实现异构蜂窝网节能,提出长周期和短周期方式相结合的基站休眠方法。长周期方式定义作用图表示基站间的相邻关系,基于业务负载通过相邻基站协作进行激活与去激活策略的选择,同时将每个基站抽象为有负载约束的博弈玩家,从而形成有约束的图博弈,分布式求解基站状态以降低信令开销和基站能耗。短周期方式引入传输和非传输模式增强对快速改变业务的适应性,通过对基站分簇和设置基站簇的模式矩阵形成基站间的潜在协作,从而降低基站间干扰实现节能。给出求解广义纳什均衡的分布式迭代算法和基站簇模式矩阵的选择过程。仿真结果表明,该方法 24小时内较参考的长周期方法和短周期方法分别节能12.6%和15.1%。

In order to adapt to the change of mobile service needs,a base station（ BS） sleep method combining long cycle and short cycle style is proposed to realize energy saving in heterogeneous dense networks. In the long-cycle style,the neighbor relationship of BSs is represented by an interaction graph. Based on traffic load,neighboring BSs cooperate to optimize the activation and deactivation strategy. Meanwhile a constrained graph game is formulated where each base station is abstracted as a game player with the constraint of traffic load. Then the base station states are solved distributedly to reduce signaling overhead and base station power consumption. In the short-cycle style,the transmission mode and non-transmission mode are introduced to enhance the adaptability to fast changing service. The BSs are clustered and the mode matrix of the BS cluster are set to form the potential cooperation among BSs,thus energy saving is achieved by reducing inter-base station interference. Then,a distributed iterative algorithm for solving the generalized Nash equilibrium and the selection process of the mode matrix of the BS cluster are given. Simulation results show that the proposed method can respectively save energy by 12. 6% and 15. 1% during 24 hours,compared with the reference long-cycle and short-cycle methods.