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    Frame synchronization method and circuit
    2.
    发明公开
    Frame synchronization method and circuit 失效
    方法和电路用于帧同步

    公开(公告)号：EP1739861A3

    公开(公告)日：2007-07-11

    申请号：EP06021426.9

    申请日：1997-12-25

    申请人： NTT MOBILE COMMUNICATIONS NETWORK INC.

    发明人： Ohtani, Tomoyuki., NTT DoCoMo Inc ,  Tamura, Motoshi., NTT DoCoMo Inc ,  Satoh, Takaaki., NTT DoCoMo Inc ,  Morikawa, Hiroki., NTT DoCoMo Inc ,  Ishino, Fumiaki., NTT DoCoMo Inc

    IPC分类号： H04B7/26 ,  H04J3/06

    CPC分类号： H04W36/18 ,  H04B7/022 ,  H04B7/2681 ,  H04W36/12 ,  H04W56/00

    摘要： Disclosed is a mobile communication system including a network constituted of at least one switching center and a plurality of base stations, and a mobile station which communicates with the base stations simultaneously. The system permits varying transmission delay between the switching center and the base stations according to the type of services available to the mobile station. The object of the present invention is to propose a communication which permits varying transmission delay according to the type of service currently employed, and to promptly recover a synchronization state even if an out-of-sync state happens. To attain the object, a memory means (mobile switching center processor 32) stores transmission delay characteristics corresponding to services which are available to the mobile station. Furthermore, a communication timing setting means (diversity handover trunk 34) determines the timing of communication for the base stations according to the transmission delay characteristic selected according to the service.