The Node B in TD-SCDMA network needs high-accuracy time synchronism

it gains the time synchronism signal at present mainly by GPS

but the GPS antenna construction difficulty is big

has concealed safe problem.Owing to the PTN IEEE 1588v2 time synchronism technology

has adopt the PTN clock to transfer

RNC distribute time synchronism signal to all Node B by PTN equipment

and make the replacing GPS on the Node B side be possible.Besides

PTN can make Iub interface using IP

and get the advantage such as raising transmission resource utilization ratio

the nimble group net

reducing luck thinking cost.It is discussed in this paper the subject of replacing GPS with PTN IEEE 1588v2

and the record of field testing and KPI statistics to verify the replacing effect.