Abstract:
A system and method for communicating between a controller and a device is provided: The controller communicates with the device over a communication link. The controller shutting off a power supply that is connected to the communication link, for example, due to inactivity parameters. The device generating a wake up signal and transmitting the wake up signal from the device to the controller while the power supply is shut off.
Abstract:
Jamming is detected as occurring to communications associated with at least one electronic device disposed at a vehicle. Responsive to detecting the jamming, an indication is transmitted from the vehicle to a base station informing the base station that jamming is occurring. Communications are subsequently conducted between the base station and the vehicle on at least one predetermined and prearranged communication channel.
Abstract:
Communications are maintained between a base station and a stolen vehicle tracking (SVT) module disposed with a vehicle. At the SVT module at the vehicle, it is determined whether jamming is occurring with communications between the SVT module and the base station and a temperature is measured at the SVT module. When jamming is detected, an adjustment is determined for a frequency of an oscillator of the SVT module and the adjustment is based at least in part upon the temperature. The frequency of operation of an oscillator is adjusted according to the adjustment. A message is transmitted to the base station according to the adjusted frequency.
Abstract:
The jamming of a radio frequency (RF) transmission after the vehicle is parked is detected. When the jamming is detected, an emergency message is broadcast on a first random access channel (RACH) associated with the vehicle according to a last known broadcast channel (BCH). When the jamming is detected, at least one last known neighbor serving cell from a stored data structure is determined, and the emergency message is broadcast on one or more second RACHs associated with each of the at least one last known neighbor serving cells.
Abstract:
A multi-band communication device with a front end antenna switch module having a reduced number of control inputs is disclosed. Control over an antenna switch modules occurs via control inputs from a controller or processor to enable operation over multiple bands or under numerous different standards. In one embodiment an input/output port is configured to connect to an antenna and a diplexer is connected to the input/output port. In this embodiment, the diplexer is configured to pass outgoing signals to the antenna and direct incoming signal from the antenna to one of two or more paths. One or more switches are connected to the diplexer such that the one or more switches are responsive to two or fewer control signals. The switch are configured to selectively enable operation of the antenna switch module into transmit or receive mode. A filter bank may also be provided as part of the module.
Abstract:
A power control loop for a power amplifier is disclosed. Embodiments of the power control loop include deriving a secondary control signal. The secondary control signal may be used to control a gain applied to the power signal in the power control loop and to control a supply current or voltage delivered to a power amplifier.
Abstract:
A system for controlling a network access device is provided. The system includes a processor, the network access device, and a control circuit. The processor being in communication with the network access device through a communication link. The control circuit monitoring a temperature of the network access device and activating or deactivating the network access device based on the temperature.
Abstract:
Communications are established with a first base station and the communications include first validation information associated with the first base station. Second validation information is obtained and the second validation information is stored in a data structure. The second validation information is associated with a second and valid base station. The first validation information is compared to the second validation information stored in the data structure and it is determined whether the first base station is valid based upon the comparison. When the comparing indicates that the first base station is not valid, a warning is initiated to a user.
Abstract:
A signal on a wireless communication system control channel can be identified as authentic or malicious by monitoring control channel signal strength changes. When a control channel signal level increases abnormally, a geographic location is obtained from a navigation system, such as a GPS. The determined location is compared to locations in a data base of locations where control channel jamming transmitters are known to exist, and/or likely to exist. If the then-current location is not in the data base, the detected control channel signal level increase is considered to be malicious, i.e., from a jamming transmitter, often used by car thieves.
Abstract:
Communications are established between a base station and a mobile unit. The mobile unit analyzes the content of at least some information received from the base station relating to neighboring cells. When the analyzing indicates that the base station is a cloned base station, a warning is initiated to the user.