Matches 501 - 550 out of 646 < 1 2 3 4 5 6 7 8 9 10 11 12 13 >
Match Document Document Title
6125260 System for generating and using global radio frequency maps  
A method is for defining a radio frequency map to be used to isolate negative effects of undesirable radio frequency emitters on radio device communications, handheld and stationary. The method...
6122507 Call handover in a non-geostationary satellite constellation  
Following a call set-up request emitted by a terminal of a given user of a telecommunications system using a constellation of non-geostationary satellites, the terminal reserves a channel in the...
6122521 Telecommunications locating system  
A telecommunications system for locating persons and things which includes a remote unit and a base unit wherein the remote unit includes a receiver for receiving navigational signals and a video...
6122524 Multiple service user terminal  
A user terminal in the form of a handset 1 is disclosed wherein a common antenna 3 is operative to provide transmission and reception on a plurality of selectable services at different frequencies,...
6122506 GSM cellular telephone and GPS receiver combination  
A GPS/GSM receiver combination for receiving GSM and GPS signals using an RF GPS integrated circuit for downconverting the GPS signal. The GPS integrated circuit includes a synthesizer for...
6122483 Method and apparatus for multicast messaging in a public satellite network  
A satellite communication system provides multicast messaging services to subscriber units. Upon receipt of a multicast communication page from a satellite communication system network, a...
6118998 Spacecraft cellular communication system with spot beam pairing for reduced updates  
A communication system includes a spacecraft which produces a plurality of overlapping spot beams. The spacecraft moves periodically in the N-S direction. Terrestrial user terminals may lie in one...
6118999 Earth station and user terminal access control system for satellite communication systems  
In a satellite communication system, a user terminal (11) seeks response from a selected earth station (7A-E) for a request for service based analysing the signal quality of broadcasts from earth...
6115606 User terminal access in satellite communication systems  
A satellite communications system comprises satellites 9A-C, earth stations 7A-E, user terminals 11 and controlling gateways 3 in the form of mobile satellite switching centers 5A-E. Access with a...
6115366 System for managing space segment usage among broadcast service providers  
A system for managing a satellite and a number of broadcast stations, which generate programs for transmission to remote radio receivers on broadcast channels via the satellite, comprises a...
6112087 Method and apparatus for user-aided registration  
At least one ground station (120) and at least one subscriber unit (SU) (130) allow users to perform user-aided registration procedures in satellite communications system (100). Ground station...
6112054 Satellite positioning method in a communication control system  
A satellite position/arrival-time calculating section calculates the arrival date and time at which a communication satellite is to arrive in a communicable area where the communication satellite...
6108539 Non-terrestrial cellular mobile telecommunication station  
The non-terrestrial cellular mobile telecommunication station uses a number of non-interference techniques to extend the usage of existing cellular mobile telecommunication radio frequencies...
6104911 Communication system with satellite diversity and method of operation thereof  
A method and apparatus for providing an economically viable satellite communication system (100) for voice, data, and video using satellite diversity to augment capacity of the system, to mitigate...
6104925 Method and apparatus for establishing group communications between subscribers affiliated with terrestrial and satellite communication systems  
Group communications between subscribers (20, 22) affiliated with a terrestrial communication system (12, 14) and subscribers (46, 48) affiliated with a satellite communication system (10) is begun...
6097765 Method and apparatus for performing digital fractional minimum shift key modulation for a very small aperture terminal  
A method and apparatus for performing fractional minimum shift key modulation for a very small aperture terminal. A signal with a fractional modulation which appears to be frequency shift key is...
6097952 Mobile communication termination controlling method and mobile communication termination controlling system  
A mobile communication termination controlling method for controlling each of a plurality of mobile stations to which a call is transmitted from a public telephone network connected to a base...
6091933 Multiple satellite system power allocation by communication link optimization  
A satellite communications system is described. The system includes a plurality of satellites, each of which transmits one or more forward links containing traffic to one or more terrestrial users....
6088572 Independent satellite-based communications systems sharing common frequency spectrum and method of operation thereof  
Multiple, different, independent constellations (10, 20) of satellites (2, 21-23) share a portion of a common frequency spectrum such as a single carrier frequency. The satellites' antennas (11)...
6088573 Transmission power control method and apparatus for mobile radio satellite communication system  
The invention provides a transmission power control apparatus for a mobile radio satellite communication system which allows frame synchronization maintenance and synchronization acquisition of a...
6081714 Low traffic handoff method for CDMA cellular network using different frequencies among base stations  
In a CDMA cellular network where base stations share a common frequency and a first base station has a second frequency in addition to the common frequency, a mobile station receives a pilot signal...
6081710 Dynamic traffic allocation for power control in multiple satellite communication systems  
A satellite communications system operative with at least one existing terrestrial communication system for carrying traffic is described. The communication system has a plurality of satellites in...
6081709 Mobile satellite radiotelephone systems and methods including mobile radiotelephone bandwidth conversion  
Direct, single hop narrow band TDMA radiotelephone communications among mobile satellite radiotelephones is provided via a satellite, while also providing reception of wide band TDMA radiotelephone...
6078786 Method and device for measuring the distance between two stations connected by a communications channel  
The invention relates to a method and a device for distance measuring between two stations (A1, B1) connected by a communication channel. The method is based on a command structure, wherein the...
6075483 Method and system for antenna beam steering to a satellite through broadcast of satellite position  
In a satellite communication system, a satellite (FIG. 1, 150) determines its position through the reception of global positioning system signals (180). The satellite (150) then broadcasts its...
6075987 Stand alone global positioning system (GPS) and method with high sensitivity  
A method is provided for determining the position of a user terminal utilizing global positioning system (GPS) satellites, each of the GPS satellites transmitting a signal containing information...
6073006 Method and apparatus for detecting and preventing fraud in a satellite communication system  
Switchable nodes (300), such as satellites (20,21) and/or gateways (40,41), along with a modified call setup procedure are used in satellite communication system (100) to prevent fraudulent users...
6072774 Communication network and method for managing internodal link topology  
A communication network (20) includes a multiplicity of switching nodes (18), many of which are located in orbiting satellites (16). Communication links (30) interconnect the switching nodes (18)....
6072985 Spacecraft cellular communication system with mutually offset high-margin forward control signals  
A spacecraft cellular communication system (10) includes a spacecraft (12) with an antenna (12a) which produces multiple "spot" beams (20a, 20b, . . . ) for serving user terminals (16) lying in the...
6073014 Method and system for dynamic group radio using existing telephony infrastructure  
A group radio system (10) uses a group radio controller (230) to connect and manage remote units (20-100) through a wireline switched telephony network. The group radio controller receives voice or...
6073012 System for defining an individual subscriber unit location within a wireless communication system and method therefor  
A method for assigning a system location to an ISU (32) residing in a wireless communication system coverage area (20) that has a plurality of billing territories (40). Base points (42) are defined...
6073011 Communication satellite load balancing system and method  
A method of controlling communication satellite system capacity in a satellite-based cellular telecommunication system where two or more communication satellites provide coverage of a service...
6070051 Method and apparatus for predicting service availability for a ground-to-satellite radio of a communication system  
A method and apparatus predicts a ground-to-satellite terminal's (16) percentage of successful communication linkage time to at least one satellite of a communication system in response to a...
6070073 Communication system and method for notification and call routing in a mobile satellite network  
A communication system and methodology are implemented to anticipate periodic or predictable disruptions of communications in a satellite communication network. The communication system and...
6070052 Decision-theoretic satellite communications systems  
A communications system allocates communication bandwidth to calls in such a manner for optimizing network system performance. The system uses knowledge about the state of the past and present...
6064859 Transmit and receive payload pair and method for use in communication systems  
Transmit, receive, and processing functions of a communication satellite are performed by two communication payload satellites. A transmit payload satellite (20) and a receive payload satellite...
6064858 Ground-station system, ground station, device, method  
Known ground-station systems offer users of mobile stations a different standard procedure for each ground station. By through-coupling an aerial of the ground station to a processing arrangement...
6064881 System and method for processing satellite based telephone usage data for billing service providers  
A technique for gathering, correlating, sorting and distributing usage data records in a satellite based telecommunications system having multiple orbiting satellites (10, 12), multiple earth...
6064891 Device for connecting a telephone switch to a fixed telephone network via a plurality of fixed radiotelephone terminals of a radiotelephone network  
A device connects a telephone switch to a fixed telephone network via a GSM or derived type radiotelephone network; a plurality of fixed user terminals being connected to said telephone switch. The...
6061562 Wireless communication using an airborne switching node  
A communication system includes an aircraft supporting an airborne switching node that provides communication services to a variety of ground-based devices located in the service region. The...
6058306 Compensation of dynamic doppler frequency of large range in satellite communication systems  
A communication system and a method of providing a feeder link to an earth orbiting satellite transponder having a mobile link illuminating spot beams with associated access channels, control...
6058147 Intelligent carrier acquisition method for satellite communications  
A narrow band RF carrier acquisition method suitable for Demand Assigned Multiple Access (DAMA) networks having multiple narrow band carriers operating with channel frequency spacing that may be...
6055426 Notification of a mobile unit out of coverage  
A communication system includes a mobile unit that communicates with a platform using a cellular telephone network or a data communication network. The mobile unit informs the platform when it is...
6052558 Networked repeater  
Cellular communication systems (20) use repeaters (50) to communicate with subscriber units (24) otherwise shadowed from base stations (22). A networked repeater (50) is provided for use in a...
6052586 Fixed and mobile satellite radiotelephone systems and methods with capacity sharing  
A mobile satellite radiotelephone system uses some of the capacity of a fixed satellite radiotelephone system in areas of congestion. Capacity sharing is obtained by providing at least one fixed...
6047161 Satellite communication system and method thereof  
A system facilitates global cellular communication by utilizing a gateway satellite (1000) which communicates with low-earth orbiting satellites (10, 20) via signalling links (1001, 1002)....
6041233 Method and system for providing global variable data rate connectivity in a satellite-based communications network  
A method and system for providing global variable data rate connectivity in a satellite-based communications network includes a plurality of communications satellites for transmitting and receiving...
6035178 Satellite communication system for local-area coverage  
A communication system provides efficient satellite communication in rural, remote, or sparsely populated areas, or in areas lacking a conventional telephone infrastructure, or in special purpose...
6031498 Antenna pattern measurement method and device  
This invention relates to a process for measuring an antenna diagram in which: the antenna (30) is connected to a receiver (33) capable of supplying C/No measures (the ratio of the useful signal...
6023606 Method for accounting for user terminal connection to a satellite communications system  
A method and system for accurately accounting for an amount of satellite communications system resources that are allotted to and utilized by a user terminal on a per call or connection basis. The...
Matches 501 - 550 out of 646 < 1 2 3 4 5 6 7 8 9 10 11 12 13 >