arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1602.08466cs.ITmath.IT
收藏

负载耦合异构网络中功率优化的范围分配

Range Assignment for Power Optimization in Load-Coupled Heterogeneous Networks

Lei You, Lei Lei, Di Yuan

摘要:

本文研究了在长期演进(LTE)异构网络(HetNet)中通过范围分配实现低功率节点(LPN)的传输能量优化问题。优化是受负载耦合模型,其中的细胞相互干扰。每个小区为其用户提供数据服务,以保持目标服务质量(QoS)。我们证明,无论存在的最大功率限制或其值,在满负荷运行是最佳的。我们通过选择LPN上的小区特定偏移来优化用户设备(UE)与小区之间的关联,从而执行能量最小化。此外,该优化问题被证明是NP-难的。提出了一种用于偏移量优化的禁忌搜索算法。对于每个偏移,TSO计算最优功率解决方案,使得所有小区都以满负载操作。数值结果表明,TSO优化总传输能量的显着性能改善,相比传统的解决方案,其中均匀偏移用于所有的LPN。

英文摘要:

We consider the problem of transmission energy op- timization via range assignment for Low Power Nodes (LPNs) in Long Term Evolution (LTE) Heterogenous Networks (HetNets). The optimization is subject to the load coupling model, where the cells interfere with one another. Each cell provides data service for its users so as to maintain a target Quality-of-Service (QoS). We prove that, irrespective the presence of maximum power limit or its value, operating at full load is optimal. We perform energy minimization by optimizing the association between User Equipments (UEs) and cells via selecting cell- specific offsets on LPNs. Moreover, the optimization problem is proved to be NP-hard. We propose a tabu search algorithm for offset optimization (TSO). For each offset, TSO computes the optimal power solution such that all cells operate at full load. Numerical results demonstrate the significant performance improvement of TSO on optimizing the sum transmission energy, compared to the conventional solution where uniform offset is used for all LPNs.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑