Abstract: A local positioning system (LPS) uses the radio propagation parameters in a CDMA forward link or TDMA reverse link to establish a mobile station's position. The mobile station receives pilot channel signals from at least three distinct base stations and records the PN chip offset of the pilot channel signals. The LPS time difference of arrival triangulation approach requires no additional signal detection capabilities. Base stations send out pilot channel signals that arrive at a mobile station with a particular phase and at least a predetermined minimum strength. The mobile station reports back the “visible” pilot channel signals, their phases and signal strength to the LPS which uses a location non-linear system, expressed as a set of cost functions, to estimate the mobile location. The LPS can also solve the 9-1-1 mobile location problem for wireless CDMA systems by determining the position of a person in distress that has a digital cellular phone.

Abstract: A radio communication system has a random access channel for the transmission of data (214) from a secondary station to a primary station. Such a channel is intended for use by secondary stations having data (214) to transmit to a primary station while not actually engaged in a call. A secondary station requesting access chooses a signature corresponding to the resource it requires to encode an access preamble (202). It may be known, from a resource availability message (402) broadcast by the primary station, that certain resources are unavailable. In this case the primary and secondary stations dynamically re-assign signatures corresponding to the unavailable resources to available resources, thereby reducing the probability of collisions between different secondary stations requesting the same resource.

Abstract: An STD (Selection Transmit Diversity) communication method. In the method, a base station selects a transmission antenna corresponding to an antenna selection signal received from a terminal, transmits a traffic channel signal through the selected antenna, and transmits a predetermined part of the traffic channel signal through an unselected antenna.

Abstract: A wireless communication system constructed according to the present invention assigns each serviced mobile unit to a serving mobile switching center to minimize mobility management overhead and to equalize loading among a plurality of mobile switching centers. The wireless communication system includes the plurality of mobile switching centers and a base station system which includes a plurality of base station controllers, each of which couples to a plurality of base stations. A plurality of mobile units served by the system are assigned to the mobile switching centers so that loading is equalized. In one particular construction of the wireless communication system, a dispatching switch couples the base station system to the plurality of mobile switching centers and performs the assignments of the mobile units. In an example of operation, upon attachment of a mobile unit, the dispatching switch determines loading of each of the mobile switching centers.

Abstract: A telecommunications system and method is disclosed for preventing sub-optimal routing of new incoming calls to a mobile station (MS) that has been re-registered at a remote optimal Mobile Switching Center/Visitor Location Register (MSC/VLR) for an optimized call. When the MS is re-registered at the remote optimal MSC/VLR, the Home Location Register (HLR) associated with the MS stores an optimization indication indicating that the MS has been re-registered to the optimal MSC/VLR. Thereafter, when an incoming call to the MS is received during the time that the MS is re-registered, the HLR can handle the call based upon the optimization indication. For example, the HLR can forward the incoming call to a local voice mail box associated with the MS.

Abstract: The present invention relates to a wireless, voice-activated remote control device for controlling an electronic device having voice control circuitry. A short-range range wireless data and voice communication link, for example using Bluetooth technology, is established between the remote control device and the electronic device. To activate voice control circuitry in the electronic device, a user supplies an input to the remote control device. In response to the user input, wireless link circuitry within the remote control device sends a control signal, for example an AT command, to the electronic device. The electronic device receives the control signal and transmits a control signal indicating the status of the electronic device. Once the voice control circuitry is activated, the user provides a voice command to the remote control device. The remote control device transmits the voice signal to the electronic device over the wireless communication link.