GNSS-assisted cellular network selection

摘要

A method of selecting a cellular network entails determining a current location using a Global Navigation Satellite System (GNSS) receiver in a mobile device, prioritizing bands based on the current location to create a set of prioritized bands, and searching the set of prioritized bands for the cellular network. This method expedites selection of the cellular network when a mobile device is powered on or when its cellular radiofrequency transceiver is activated.

主权项

1. A method of selecting a cellular network, the method comprising:
determining a current location using a Global Navigation Satellite System (GNSS) receiver in a mobile device, comprising obtaining, using the GNSS receiver, a partial position fix providing a coarse approximation for the current location based on Doppler frequency shift measurements, ephemeris data already stored in a memory of the mobile device and a received time tag within a received GNSS signal; prioritizing cellular network frequency bands based on the current location to define a band priority; and selecting the cellular network based on the band priority.