为了解决TD-SCDMA系统中无线基站NodeB与无线网络控制器RNC之间的时间同步技术问题,改变全球定位系统作为惟一解决方案的现状,研究了IEEE1588V1及IEEE1588V2技术原理,综合比较了已有的网络时间协议NTP、简单网络时间协议SNTP等时间同步技术,结果表明,IEEE1588具有更高时间同步精度,符合TD-SCDMA系统时间同步精度要求。根据目前电信网络体系,设计了基于现有网络并结合IEEE1588技术的组网方案。
To develop the technology of time synchronize between NodeB and radio network controller (RNC) in TD-SCDMA, and change the status of global position system (GPS) as the only way to synchronize time, IEEE1588 V1 and IEEE1588 V2 are studied. Network time protocol (NTP) and simple network time protocol (SNTP) are also studied and compared with IEEE1588. IEEE1588 has higher time precision and accord with the TD-SCDMA system time precision requirement is proved. A solution base on the existing telecom network using IEEE 1588 is proposed.