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    METHOD AND APPARATUS FOR PROVIDING WIRELESS COMMUNICATION SYSTEM SYNCHRONIZATION
    8.
    发明专利
    METHOD AND APPARATUS FOR PROVIDING WIRELESS COMMUNICATION SYSTEM SYNCHRONIZATION 未知

    公开(公告)号：CA2353453A1

    公开(公告)日：2000-06-15

    申请号：CA2353453

    申请日：1999-12-03

    Applicant: QUALCOMM INC

    Inventor： WALTSON J ROD ,  WHEATLEY CHARLES E III ,  WALLACE MARK S ,  TIEDEMANN EDWARD G JR

    IPC: H04B7/24 ,  H04B7/26 ,  H04L7/00 ,  H04L7/08 ,  H04Q7/36 ,  H04B7/216 ,  H04Q7/30

    Abstract: When insufficient traffic is present in the network to maintain synchronization in this manner, other methods must be used. One approach involves making direct measurements of the timing between base stations (602 , 604). This is accomplished in one of two ways. The base may interrupt its transmissions on all sectors for a short interval during which it determines the time of arrival of signals from other base stations (602, 604). Given knowledge of the other base station locations, time errors relative to all other base stations (602, 604) may be derived. Alternatively, the base may send a short signal at high power in the mobile transmit band. This time-of- arrival of this signal is measured by the surrounding base stations and the time errors between pairs of base stations are computed. In some cases, a ba se station (602, 604) may be isolated sufficiently from all other base stations in the network such that direct base-to-base measurement is not viable. In this case, a fixed mobile (606) is placed at a location in the handoff regio n between the isolated cell and another cell in the network. The fixed mobile (606) either performs measurements of base station pilots on command of the base and reports the timing information, or sends a burst transmission at a specified time and power levelto be measured by the base stations.

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