| 摘要 |
A system for locating a mobile unit (12) of an unsynchronized cellular network, in which a assigned mobile unit (14) is a provisional reference mobile unit (14). The reference mobile unit (14) constantly tries to achieve self location, records base transceiver stations (16 and 18) location times, and synchronize available base transceiver stations (16 and 18) to its own clock, the base transceiver stations (16 and 18) are also synchronized to a system time reference of a navigation satellite system (10). A mobile unit (12) of a cell records reception times of base transceiver stations (16 and 18) and navigation satellites (10), synchronizing them as referenced by local clock. Mobile unit location (12) is processed at central location server or in the mobile unit (12), by collecting reception times, synchronization data from (14) and location parameters if available.
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