METHOD AND SYSTEM FOR SYNCHRONIZING BASE STATION AND ESTABLISHING LOCATION

摘要

With the increasing usage of mobile devices for communication, the need for wireless base-stations deployed in strategic locations is becoming increasingly important. The increased bandwidths being transmitted between the base-station and the mobile device has mandated that enhanced transmission formats and techniques be deployed, and, in order to operate correctly, these techniques require a tight synchronization in both time/phase, and in frequency, between the various base-stations serving a general area. Due to the need to establish the geographic location of the mobile device with a high degree of accuracy, it is also necessary to establish the location of the serving base-stations with a high degree of accuracy. The invention disclosed herein provides robust and practical methods for synchronizing base-stations, as well as providing for accurate location, by leveraging the usage of global navigation satellite systems receivers in conjunction with network based schemes for packet-based (time/phase/frequency) synchronization.

主权项

1. A method of determining time offset and/or location of a first receiver, comprising:
estimating a plurality of pseudoranges based on satellite signal time delays, wherein the pseudoranges include at least one of (a) pseudoranges between the first receiver and one or more satellites estimated by the first receiver at distinct times, and (b) pseudoranges between one or more second receivers and one or more satellites estimated by the one or more second receivers, the one or more second receivers being syntonized with each other and with the first receiver; determining at least one of the time offset and the location of the first receiver by solving a set of equations formulated based on the estimated pseudoranges; and outputting a signal reflective of the determined one of the time offset and the location of the first receiver.