Abstract: Methods and apparatus for supporting peer to peer and infrastructure, e.g., cellular, communication in a multimode device which can operate in a cellular system are described. Methods and apparatus for supporting peer to peer devices are also described. Peer to peer communication occurs within a switching time period during which infrastructure signaling does not occur and devices switch between an uplink and a downlink mode of infrastructure operation. The time period set for the switching time period is intentionally set larger, e.g., 10, 50, 100 or even more times larger than that required based on maximum cell size. Thus, a peer to peer communications period can be introduced into a TDD system and use the same frequency band as the TDD system in a manner that can remain compliant with a cellular communications protocol which allows for a switching time period, e.g., set in the system by a parameter.

Abstract: This patent discloses a method to communicate between a femtocell base station and mobile devices. The method may include identifying as an alert group a set of mobile devices presently in communication with the femtocell base station and whose unique identifiers are preregistered with the femtocell base station. A first mobile device and a second mobile device may be in the set of femtocell service region mobile devices. The femtocell base station may receive a call from a third mobile device. If the call is for the second mobile device, then the method may send a paging message from the femtocell base station. The paging message may include a first unique identifier associated with the first mobile device.

Abstract: In a particular embodiment, a system includes a controller configured to receive proximity data associated with a first device of a plurality of devices. The proximity data indicates a relative location of each of one or more devices of the plurality of devices with respect to the first device. The controller is further configured to determine an estimated intermodulation product. The estimated intermodulation product is calculated based on the proximity data. The controller is further configured to initiate transmission of one or more commands, based on the estimated intermodulation product, to at least one device of the plurality of devices.

Abstract: Systems and methodologies are described that facilitate multimode communication in wireless networks. Receiving and/or transmitting components can comprise a plurality of receive paths over which antennas can forward concurrently received signals to facilitate simultaneous or shared receiving of signals related to disparate communication technologies. The receive paths can be implemented by one or more multiplexers (e.g., diplexers, triplexers, etc.) to facilitate separating signals simultaneously received over disparate bands. In addition, antenna switching is described to facilitate shared receiving. Multimode transmitting is similarly provided. In particular, voice, data and global positioning system (GPS) signals can be concurrently received and processed by a wireless device.

Abstract: This patent discloses a method to communicate between a femtocell base station and mobile devices. The method may include identifying as an alert group a set of mobile devices presently in communication with the femtocell base station and whose unique identifiers are preregistered with the femtocell base station. A first mobile device and a second mobile device may be in the set of femtocell service region mobile devices. The femtocell base station may receive a call from a third mobile device. If the call is for the second mobile device, then the method may send a paging message from the femtocell base station. The paging message may include a first unique identifier associated with the first mobile device.

Abstract: Improved radio receiver designs can be used in the operational environment of wireless telephone communications. The radio receiver includes a variable attenuator, an RF signal amplifier, and a controller. The controller controls the amount of attenuation provided by the variable attenuator in response to signals received by the RF signal amplifier. The controller adjusts the variable attenuator to achieve a minimum symbol error rate and/or to maximize the signal-to-noise and interference ratio for a desired signal, irrespective of the levels of any interfering signals received by the RF signal amplifier. In this manner, the variable attenuator is adjusted to obtain just the right amount of intermodulation performance for a given set of receiving conditions. This technique saves operating current and minimizes noise figure because, in practice, interference conditions do not persist all of the time, and are usually of temporary duration.

Abstract: Improved radio receiver designs can be used in the operational environment of wireless telephone communications. The radio receiver includes a variable attenuator, a variable-current RF signal amplifier, and a controller. The controller controls the amount of attenuation provided by the variable attenuator, and/or the current consumed by the variable-current RF signal amplifier, in response to signals received by the RF signal amplifier. The controller adjusts the variable attenuator, and/or the RF signal amplifier, to achieve a minimum symbol error rate and/or to maximize the signal-to-noise and interference ratio for a desired signal, irrespective of the levels of any interfering signals received by the RF signal amplifier. In this manner, the variable attenuator, and/or the variable current RF signal amplifier, are adjusted to obtain just the right amount of intermodulation performance for a given set of receiving conditions.

Abstract: Improved radio receiver designs are disclosed that can be used in the operational environment of wireless communications. The radio receiver includes a signal input terminal, a variable-current RF signal amplifier, a demodulator, and a controller. The variable-current RF signal amplifier has an input terminal for accepting RF input signals, an output terminal for generating an amplified version of the RF input signals, and a current control terminal for controlling the current consumption of the RF signal amplifier. The signal input terminal is coupled to the input terminal of the variable-current RF signal amplifier, the output terminal of the variable-current RF signal amplifier is coupled to the demodulator, and the current control terminal is coupled to the controller. The controller is also coupled to the demodulator. A received signal, including any noise and/or interference, is coupled to the signal input terminal.