Abstract: In one embodiment, a device of a first wireless communication network determines location information and antenna properties corresponding to each of a plurality of unintended receivers of a second wireless communication network. The device may then compute a protection zone for each of the plurality of unintended receivers based on the location information and antenna properties, wherein a protection zone defines a geographical area where transmission by a terminal in the first wireless communication network might interfere with operation of a corresponding unintended receiver. As such, the terminal may thus determine whether to perform or prevent an attempted transmission to an intended receiver in the first wireless communication network based on whether a current location of the terminal, at a time of the attempted transmission by the terminal, is within any protection zone of the plurality of unintended receivers.

Abstract: An oscillator may be embedded in a sealed hole in a circuit board, for the purpose of shielding it from air currents, including convective air currents. The hole may be formed by drilling. The oscillator may be mounted in the hole and may be covered by a heat-insulating material, for example, insulating tape.

Abstract: A portable communications device (PCD) for communications with two or more communications systems including a power unit, a transceiver unit and a control unit. The power unit is for powering the communications device so as to enable it to be portable. The transceiver unit includes a local unit for communicating with a local communications system and a satellite unit for communicating with a satellite communications system. The control unit is for controlling communications by the local unit and the satellite unit. The control unit includes a sensing algorithm for sensing requests for communications, a selection algorithm for automatically selecting the local unit or the satellite unit for communications. A software controlled transceiver unit is used together with parameter algorithms for automatically controlling communications and modifying the system budget.

Abstract: A personal communications device for communications using a satellite in a satellite communications system. The personal communications device includes a location algorithm for determining the satellite location and the personal communications device location, a path algorithm for predicting an improved communication path between the satellite and the personal communications device, a position change algorithm for determining a recommended change in position of the personal communications device so as to position the personal communications device in the improved communication path.

Abstract: A personal communications device for communications using a satellite including emergency calls using a satellite in a satellite communications system where the satellite communications system processes emergency calls. The device includes a power unit for powering the personal communications device, a transceiver unit for communicating with the satellite and a control unit for controlling the personal communications device. The control unit includes an emergency call processor for controlling emergency calls with a satellite and includes a location processor for determining the location of the personal communications device whereby an emergency call transmitted to a satellite includes the location of the personal communications device. A user interface provides for emergency call communication with a caller.

Abstract: A portable communications device (PCD) for communications over a plurality of communication channels and a cross router for controlling one or more of the communication channels to be active. Typically, the plurality of communications channels includes a cellular channel, a satellite channel and a WiFi channel.

Abstract: A communication system that communicates for locating one or more tags in a time and energy efficient manner. The tags are positioned in a communication region and are located by a locator. The tags are located through organized transmission and reception of signals between the tags and the locator. The locator locates and gives directions to tags from the locator using a radio link and a multi-channel ultrasonic acoustic link. The combination of linkages provides the means to determine the unobstructed bearing and distance between the locator and the tag and resolves multipath reflections.