12.
    发明专利
    未知

    公开(公告)号:DE4293440C2

    公开(公告)日:1997-08-14

    申请号:DE4293440

    申请日:1992-08-19

    Applicant: MOTOROLA INC

    Inventor: AVERBUCH NIMROD

    Abstract: A communication system provides data packet timing alignment to facilitate soft handoff. A vocoder (315) transmits compressed voice frames to base-stations (130,131) along links (110,112) of variable length, DELTA L. The DELTA L translates to a delay DELTA t in the air-frames to be transmitted by the base-stations (130,131). To compensate for the time delay DELTA t, the communication system advances both sets of air-frames to be transmitted by base-stations (130,131) by at least DELTA t so that skipping of frames, relative to an air-frame reference (300), during transmission does not occur.

    Clock rate matching for independent networks

    公开(公告)号:DE4244920C2

    公开(公告)日:2003-05-08

    申请号:DE4244920

    申请日:1992-02-10

    Applicant: MOTOROLA INC

    Abstract: The clock rate matching appts for independent networks includes a memory (400), microprocessor (405) and a digital signal processor (406). A PCM signal is received by an analog/PCM block (124) and the clock (CLK1) extracted by a modem (126). The modem extracts the data and passes it to a memory (400) at the extracted clock speed. The data is clocked out of the buffer by a separate clock (CLK2). The difference in clock speeds is measured by the movement of the buffer pointers. In order to match the two clock rates, bits are added or deleted from the exit path of the memory.

    DATA PACKET ALIGNMENT IN A COMMUNICATION SYSTEM

    公开(公告)号:CA2096728C

    公开(公告)日:1998-06-23

    申请号:CA2096728

    申请日:1992-08-19

    Applicant: MOTOROLA INC

    Inventor: AVERBUCH NIMROD

    Abstract: A communication system provides data packet timing alignment to facilitate soft handoff. A vocoder (315) transmits compressed voice frames to base-stations (130, 131) along links (110, 112) of va riable length, ~L. The ~L translates to a delay ~t in the air-frames to be transmitted by the base-stations (130, 131). To compensate for the time delay ~t, the communication system advances both sets of air-frames to be transmitted by base-stations (130, 131) by at least ~t so that skipping of frames, relative to an air-frame reference (300), during transmission does not o ccur.

Patent Agency Ranking