Abstract: An RSSI block cumulating circuit block-cumulates an RSSI signal that has been A/D converted and calculates an RSSI signal in a low level. An RSSI level raising circuit raises the level of the RSSI signal and outputs the resultant signal as a threshold value. An RSSI continuous cumulating circuit always cumulates the RSSI signal. A comparing circuit compares the threshold value with the output signal of the RSSI continuous cumulating circuit and determines whether or not a carrier is present.

Abstract: A synchronization circuit modulates a data signal with an amplitude shift keying (ASK) modulation method using an ASK modulation signal to output a modulated signal under the condition that the ASK modulation system and data signal are synchronized with each other. A drive circuit executes a push-pull operation based on the modulated signal and a resonance circuit resonates, under the push-pull operation of the drive circuit, to transmit a transmission signal in a radio wave. The synchronous signal controls a switching device to cut off a connection between the resonance circuit and the ground in synchronization with the modulated signal. Thereby, the transmission signal is generated sharply in the signal transmitter.

Abstract: A method for operating a mobile satellite telecommunications system has steps of (a) providing a user terminal that is operable to simultaneously receive a communication signal from a gateway via a plurality of satellites; and, (b) at the gateway, selectively transmitting the communication to one satellite or a plurality of satellites each having a coverage area that includes a current location of the user terminal. The step of selectively transmitting includes a step of considering a plurality of factors, including a current reception state of the user terminal, a current state of satellite power of at least one of the plurality of satellites, and a predicted required state of satellite power of the at least one satellite. The current reception state of the user terminal is indicated by a received signal quality indicator, which in the preferred embodiment is expressed as the Frame Error Rate (FER).

Abstract: A communication device comprising a processing system, a network interface system, a wireless interface system, and a wireline interface system. The processing system is configured to exchange information with a communication network at user-controllable time intervals, provide retrieved information to at least one of a wireless communication device and a wireline communication device based on a user profile, and dynamically adjust the information exchange based on a network capacity. The network interface system is configured to exchange information retrieval messages with the communication network and exchange the information with the communication network under control of the processing system. The wireless interface system is configured to exchange information with the wireless communication device under control of the processing system. The wireline interface system is configured to exchange information with the wireline device under control of the processing system.

Abstract: A service management system based on customized profile management codes. In an advanced intelligent network, a central control point includes a set of logic that defines profile management codes customized for individual subscribers or groups of subscribers. When the central control point receives a profile management code for a particular subscriber, for instance, the central control point may interpret the profile management code altogether differently than it does for the same code from another subscriber. For instance, the logic in a single central control point may indicate for one subscriber that the code “11” means to “activate call forwarding,” and the logic may indicate for another subscriber that the code “11” means to “bill the call to a specified third party account.