Abstract: A system and method for automatically controlling the rate of updates for data applications running on a mobile device. The method includes monitoring the data applications running on the mobile device, determining the data applications that receive updates to the mobile device, detecting the set-up of a voice call, and adjusting the time between updates based on the detecting step. The detecting step may include detecting an input by a user, detecting a call set-up request by the mobile device, or detecting that the mobile device is positioned near a head of a user. The determining step may include measuring the time between updates to the data application or detecting a signal from the data application indicating that updates may occur or detecting a signal from the data application indicating that automatic updates of the data application are enabled. The adjusting step may include lengthening the time between updates or suspending updates to the data application during a voice call.

Abstract: A system and method for automatically controlling the rate of updates for data applications running on a mobile device. The method includes monitoring the data applications running on the mobile device, determining the data applications that receive updates to the mobile device, detecting the set-up of a voice call, and adjusting the time between updates based on the detecting step. The detecting step may include detecting an input by a user, detecting a call set-up request by the mobile device, or detecting that the mobile device is positioned near a head of a user. The determining step may include measuring the time between updates to the data application or detecting a signal from the data application indicating that updates may occur or detecting a signal from the data application indicating that automatic updates of the data application are enabled. The adjusting step may include lengthening the time between updates or suspending updates to the data application during a voice call.

Abstract: The present invention relates to systems for determining mobile communications system carrier propagation characteristics. In an embodiment, a system includes a frequency scanner, signal strength measurement device, digital verification color code logic, a location determining unit, and a memory. The frequency scanner can output a carrier signal corresponding to a carrier signal identifier, where the frequency scanner is located at a geographical location. The signal strength measurement device can be coupled to the frequency scanner and determine a carrier strength indicator of the carrier signal. The digital verification color code logic can be coupled to the frequency scanner and determine the digital verification color code of the carrier signal. The location determining unit can be coupled to the frequency scanner and determine a location identifier corresponding to the geographical location of the frequency scanner.

Abstract: A method of effecting a handoff in a cellular network. The method includes monitoring a set of frequencies listed in a mobile assisted handoff (MAHO) list for their respective signal strengths, each of the frequencies being associated with neighbor cell site, logically ordering the frequencies based on their relative signal strengths, identifying in the logically ordered set of frequencies those frequencies having a signal strength higher than a predetermined threshold, determining a level of traffic at each frequency/cell site associated with the set of frequencies, and selecting a cell site for handoff based at least in part on signal strength and in part on the level of traffic at the neighbor cell site.

Abstract: The present invention relates to systems for determining mobile communications system carrier propagation characteristics. In an embodiment, a system includes a frequency scanner, signal strength measurement device, digital verification color code logic, a location determining unit, and a memory. The frequency scanner can output a carrier signal corresponding to a carrier signal identifier, where the frequency scanner is located at a geographical location. The signal strength measurement device can be coupled to the frequency scanner and determine a carrier strength indicator of the carrier signal. The digital verification color code logic can be coupled to the frequency scanner and determine the digital verification color code of the carrier signal. The location determining unit can be coupled to the frequency scanner and determine a location identifier corresponding to the geographical location of the frequency scanner.

Abstract: The effects of fading on communication using a mobile telephone is reduced by switching between two or more antennas which are used to provide communication between a base station and a mobile telephone in response to a synchronization signal without arcing. The synchronization signal is generated in accordance with a signal quality measured by the mobile telephone. The synchronization signal is either transmitted back to the base station, whereupon the base station determines whether or not to switch based on the transmitted downlink signal quality, or used by the mobile phone to generate an antenna switching instruction that is transmitted back to the base station, whereupon the base station switches between the antennas in accordance with the instruction. Alternatively, the synchronization signal is generated by the base station without feedback from the mobile telephone.

Abstract: Systems and methods are provided for allowing a first wireless unit and a second wireless unit to share a single communication channel including a transmit frequency and a receive frequency. The systems and methods allow for a more spectrally efficient transmission of Push To Talk mode calls over a Time Division Multiple Access system.

Abstract: A method for authenticating a cellular service provider during over the air activation of a mobile station includes the steps of programming an A-key value into the mobile station and providing the A-key value to the service provider. The mobile station requests over the air activation by transmitting a registration request to the service provider. The service provider verifies billing information and generates two random numbers. The service provider then performs a first CAVE algorithm using the provided A-key value and the first random number to generate a first shared secret data value. The service provider performs a second CAVE algorithm using the first shared secret data value and the second random number to produce a first authentication value. The service provider then transmits the first and second random numbers along with the authentication value to the mobile station.