业务码 meaning in English

service code

The theoretic basis and the dat agram format of the newly propounded rts method are presented . finally , in the protocol stack of ip over ethernet , after the analysis of plesiochronization method and external clock method , a new synchronization method of absolute time stamp ( ats ) method is put forward , and detailed discussion is presented in this thesis
针对物理层不能提供同步的情况(如ipoverethernet ) ，本文在分析基于外部同步信息的准同步法和外同步法以及基于业务码流的自适应时钟法之后，提出了一种新的绝对时标法，并对该方法的实现进行了较为详细的研究。