电讯技术2018，Vol.58Issue(3)：306-312,7.DOI:10.3969/j.issn.1001-893x.2018.03.012
基于时延补偿的小小区多跳空口同步
Multi-hop Radio Interface Synchronization in a Small Cell Network Based on Time Delay Compensation
摘要
Abstract
In a cellular heterogeneous network(HetNet) where a large number of small cells are densely deployed,time-frequency synchronization among the small cells plays an important role in bringing the ad-vantages of small cells technology,and it is also a prerequisite for realistic network operation.Traditional cell synchronization technologies include the satellite aided synchronization and the IEEE 1588 protocol synchronization.In order to overcome the shortcomings of traditional methods,radio-interface based syn-chronization(RIBS) for small cells becomes a hot research topic.Based on radio interface,a multi-hop RIBS mechanism with time delay compensation is proposed,where the synchronization level of the source cell synchronization signal is determined by its corresponding time shift in the radio frame,and the propaga-tion delay of the source cell radio-interface synchronization signal(RISS) is compensated to improve the synchronization precision of the target small cell.Simulation shows that the timing synchronization error of the proposed scheme can maintain a level of 1滋s or less when the number of synchronization hops is four. Therefore,it effectively improves the network synchronization accuracy,surpasses the limit of the RIBS syn-chronization hops,and meanwhile expands the RIBS area within the network.关键词
异构网络/小小区/空口同步/多跳同步/时延补偿Key words
heterogeneous network(HetNet)/small cell/radio interface synchronization/multi-hop syn-chronization/time delay compensation分类
信息技术与安全科学引用本文复制引用
雷珍珠,徐浪,申滨,黄晓舸..基于时延补偿的小小区多跳空口同步[J].电讯技术,2018,58(3):306-312,7.基金项目
国家科技重大专项(2016ZX03001010-004) （2016ZX03001010-004）
