Abstract: A method and apparatus for efficient network scanning that selects candidate frequencies based upon the frequency bands that were noted as being active during a previous network scan. A mobile device performs a full network scan on power up or on radio cycle and determines the available active bands. This information is stored as active band information on the device. When the device loses coverage on a selected one of the bands, then it identifies a candidate frequency based upon the stored active band information and attempts to locate a suitable network on the candidate band.

Abstract: A method and apparatus for efficient network scanning that selects candidate frequencies based upon the frequency bands that were noted as being active during a previous network scan. A mobile device performs a full network scan on power up or on radio cycle and determines the available active bands. This information is stored as active band information on the device. When the device loses coverage on a selected one of the bands, then it identifies a candidate frequency based upon the stored active band information and attempts to locate a suitable network on the candidate band.

Abstract: A method and apparatus for efficient network scanning that selects candidate frequencies based upon the frequency bands that were noted as being active during a previous network scan. A mobile device performs a full network scan on power up or on radio cycle and determines the available active bands. This information is stored as active band information on the device. When the device loses coverage on a selected one of the bands, then it identifies a candidate frequency based upon the stored active band information and attempts to locate a suitable network on the candidate band.

Abstract: A method and apparatus for locating, in relation to a plurality of cell sites, a mobile cellular transceiver in a conversation state. The method includes the steps of transmitting from one of the plurality of cell sites to the mobile transceiver a handoff signal for causing the mobile transceiver to continually transmit a known beacon signal while still in the conversation state, at at least some of the plurality of base stations, receiving the known beacon signal and measuring the time at which the known beacon signal was received, and calculating the location of the mobile transceiver from the respective locations of each of the at least some of the plurality of cell sites and the respective times at which the beacon signal was received at each of the at least some of the plurality of cell sites.