摘要
随着异构节点的大量接入,LTE-Advanced系统日趋复杂,PCI(physical cell identification,物理小区标识)自配置作为网络运行前的关键一步,对于网络规划、网络性能的提升具有重要作用。考虑到PCI对于小区搜索和同步过程的重要性,提出了一种基于最短距离—最远距离的PCI自配置算法,对PCI资源进行了合理有效的分配,有效地规避了小区同步信号干扰,提升了系统性能。系统级仿真结果表明,与经典的顺序PCI分配算法相比,本文提出的算法在扇区平均频谱效率和边缘用户频谱效率方面都有显著的提升。
With many low-power nodes deployed in the network,LTE-Advanced system becomes more complicated.PCI automatic allocation,as a key step before system operation,plays an important role in network planning and promoting system performance.Reasonable PCI is of great importance to cell search and synchronization.A PCI automatic allocation method,which is based on the nearest-distance and farthest-distance simultaneously,was proposed.By this method,PCI could be allocated reasonably,and synchronization signal interference could be avoided efficiently,with system performance promoted.System level simulation results show that,the proposal method performs much better in terms of both sector average spectrum efficiency and cell edge user’s spectrum efficiency,compared with the classical sequential PCI allocation.
出处
《电信科学》
北大核心
2013年第7期30-36,共7页
Telecommunications Science
基金
"新一代宽带无线移动通信网"国家科技重大专项基金资助项目(No.2011ZX03003-002-01
No.2012ZX03001028-04)
霍英东教育基金会应用基础研究项目(No.122005)
新世纪优秀人才支持计划资助项目
关键词
自组织网络
物理小区标识
自配置
系统级仿真
self-organizing network
physical cell identification
automatic allocation
system-level simulation
