欧洲的宽带电力线通信接入系统

Access Systems in European Broadband Power Line Communications

分别从网络体系结构与系统组成、安全性与私密性、传输距离与覆盖范围、小区间干扰、信号耦合方式与安装几方面介绍了欧洲宽带电力线通信（PLC）接入系统的一个实例。现场试验表明，PLC系统室外部分使用低频段、室内部分使用高频段可解决通路损耗与电磁兼容性问题；时分多址和时分双工将成为比较好的候选技术；在无中继器情况下，最大室外传输距离可达２５０～３００m；保证相邻PLC系统之间上行时隙和下行时隙的同步能解决邻室PLC系统间的干扰问题；选择适当的信号耦合方式对获得良好覆盖十分重要。

The European broadband power line com-mu ni c a tions(PLC)access systems exemplifies the network sys tem architecture,syst em components,se cu rity,pri vacy and confidentiality,transmission span and c ov erage,inter-cell interference,sig-nalling cou pling,and in stallation. Field trial sug-gests that the pro pogation loss and EMC issue can be re solved by the utiliza tion of high fre quency band in in-door systems and low fre q uency band in out-door sys tems.TDMA and TDD technologies are best op tions.T he maximum repeaterless trans-mis sion dis tance can reach up to250-300m e-ters.The syn chronization of up link and downlink time slots in adjacent PLC sys tems is a way to solve jamming.Appropriate signaling coupling ap-proa ches are im portant to coverage.