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6269245 |
Cellular communication system employing dynamic preferential channel allocation
An earth orbiting satellite communicates with ground-based communication terminals via a limited number of frequency channels. To maximize the amount of concurrent communication that can be...
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6256507 |
Telecommunications network synchronization for data services
A star network type topology is implemented for a network synchronization system wherein synchronization information radiates from a centralized primary reference source comprising the global...
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6256496 |
Digital radio communication apparatus and method for communication in a satellite-supported VSAT network
An improved digital radio communication apparatus and method for communicating in a satellite-supported VSAT network consisting of a plurality of VSAT member stations and at least one central...
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6252543 |
Location system combining ranging measurements from GPS and cellular networks
Methods and arrangements are provided for locating a mobile terminal within a mobile telecommunications system. In certain embodiments, GPS ranging signals and cellular base station transmitted...
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6249676 |
System and method for call optimization between mobile terminals in a satellite network
A telecommunications system and method is disclosed for restricting optimization of calls between mobile terminals within a satellite network to allow implementation of supplementary services....
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6249677 |
Apparatus and method for delivering key information of a channel request message from a user terminal to a network
An apparatus and method, for use with the satellite-based communications network, for improving the reliability and speed at which communication between a user terminal and the network is...
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6246873 |
Satellite communication conference system for use in a satellite communication system
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6243587 |
Method and system for determining position of a mobile transmitter
A system and method is provided for determining position of a mobile transmitter, such as a cellular telephone. The transmitter transmits a first signal at a first frequency (such as a RACH signal)...
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6236834 |
Method and apparatus for limiting interference between satellite systems
A method and apparatus for preventing interference between a first satellite and a second satellite which share frequencies for their up or down links is disclosed. A ground station receives...
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6233429 |
VSAT satellite telecommunications system
A VSAT telecommunications system including a satellite, first and second VSAT terminals, and a hub communicating via the satellite with the first and second VSAT terminals, the transmissions from...
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6233451 |
Spot beam selection in a mobile satellite communication system
An access terminal for initiating spot beam selection in a satellite communication system, in which the access terminal includes a receiver for measuring the received signal strength (RSS) of a...
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6229986 |
Reconfigurable analog channel processor for multibeam satellites
An analog transponder processor for use in a multibeam satellite receiving input beam signals and transmitting output beam signals has an input switch matrix, channel processors, and an output...
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6226521 |
Channel allocation method and apparatus
In a satellite communications network, local pools of available carriers are assigned to each ground earth station GES by a network channel management station NCMS, which stores a pool of...
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6226493 |
Geosynchronous satellite communication system and method
A geosynchronous satellite system (10) uses crosslinks (30) between geosynchronous satellites (16) which travel along the same ground path (18) or are located within a common orbital slot (32) in...
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6218984 |
Geo-referencing radio position determination systems using co-located antennas
The present invention is a method and apparatus for establishing a common datum georeferenced position of the phase centers of the antennas used by a system. The system includes a GPS receiver and...
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RE37140 |
System and method for channel assignment in a satellite telephone system
A system and method for making channel assignments in a low earth orbit satellite telephone system wherein Doppler effect is utilized as a parameter in channel assignment. In a first embodiment the...
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6212360 |
Methods and apparatus for controlling earth-station transmitted power in a VSAT network
A method is shown for providing stable communication between a hub earth-station and a VSAT earth-station by regulating the power of signals transmitted via a satellite. In this method, the hub...
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6208625 |
Method and apparatus for increasing call-handling capacity using a multi-tier satellite network
A system for increasing call-handling capacity employs a multi-tier satellite network which includes one or more geosynchronous (GEO) satellites (12) and non-geosynchronous satellites (14). The GEO...
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6208836 |
Earth station acquisition system for satellite communications
In a satellite communication system where user terminals 11 communicate via satellites 9A-E with earth stations 7A-E to join with a terrestrial telephone network 1, a controller 18 at a master...
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6205320 |
System for satellite to airship to gateway/customer premise equipment, and airship to airship, high data rate relay
A system is disclosed for transmitting data from satellites to unmanned or manned air vehicles (U/MAVs), and then from U/MAVs to Gateway/customer premise equipment (Gateway/CPE). Conversely, the...
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6205332 |
Telecommunications system across national borders
A telecommunications system for providing telecommunication services across national borders to a plurality of system subscribers. The system includes an operations center for receiving incoming...
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6205319 |
Dual phased-array payload concept
A dual phased array payload (100) for use onboard a communications satellite is disclosed. The payload includes one or more phased array receive antennas (102-108) including numerous individual...
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6201961 |
Use of reference phone in point-to-point satellite communication system
A local broadcast mode operation is implemented in a point-to-point satellite communications system (10) by utilizing a terrestrial reference terminal or phone (20) that is located within a desired...
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6198921 |
Method and system for providing rural subscriber telephony service using an integrated satellite/cell system
An integrated satellite/cell system and equipment that provides low-cost telephony services to remote/rural and other previously non-served areas. Local communications is through wireless cell...
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6198922 |
Method and system for locating subscribers in a global telecommunications network
A system and method for managing an interaction with a user of a telecommunications network is disclosed. The telecommunications network utilizes data relating to a geometry of the network. The...
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6192430 |
Innovative dual-channel serial interface circuit scheme
A mixed-signal processor (MSP) chip with a flexible serial interface which simultaneously accommodates two serial ports on a reduced number of pins. The pin definitions of these serial ports are...
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6188885 |
Communications systems for transmitting high power voice mail notifications and related methods and user terminals
A user terminal provides communications to and from a radiotelephone communications system. This radiotelephone communications system supports communications with the user terminal at a first power...
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6185407 |
Method for evaluating performance of a low earth orbit satellite system
A method for evaluating the performance of a LEOS system. The evaluation may determine the minimum and maximum number of hops or delay time required to service a particular source and destination...
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6181912 |
System and method for user terminal clock error measurement and correction
A method and apparatus useful for determining the accumulated error in a user terminal dock in a satellite communications system. The satellite communications system includes a gateway, a satellite...
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6181931 |
Method and apparatus for dynamic address allocation in a wireless communication system
A method and apparatus for dynamically assigning identification information to mobile communication terminals (MCTs) in a satellite communication system. A subset of identification addresses is...
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6181913 |
Method for establishing a connection in a satellite system and satellite system suitable for practicing such method
The invention relates to establishing a connection in a satellite system. The base station continuously transmits information to the satellite for establishing a connection. The first terminal...
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6175340 |
Hybrid geostationary and low earth orbit satellite ground station antenna
A hybrid geostationary and low earth orbit (LEO) ground station antenna provides a geostationary receive antenna (30) which generates a narrow receive antenna beam for use with geostationary...
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6173155 |
Method and apparatus for spacecraft amplification of multi-channel signals
The number of high power amplifiers required for multi-channel satellite communications is reduced by a high power amplification of selected sets of signals in respective common amplifiers, with...
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6173156 |
Global message delivery system and method using GEO and Non-GEO satellites
A message processing center (140) is used in a global message delivery system. Message processing center (140) uses at least one GEO satellite (130) and at least one Non-GEO satellite (120) to...
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6163677 |
Portable satellite communication terminal system
A satellite communication terminal system can execute voice communication even if it is placed at a location which is obstructed from a communication satellite by any object and has no telephone...
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6163678 |
Satellite packet terminal and method for transmitting packet data from the same
To carry out smooth data communication even when a radio communication channel with a satellite is in a fault state, it is judged whether the radio communication channel is in a fault state or not,...
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6161018 |
Method and system for estimating a subscriber's location in a wireless communication system service area
At a receiver location in a wireless communication system service area, a set of characteristics that describe a received ray of a subscriber signal is measured. In a model of the wireless...
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6160993 |
Method and apparatus for command and control of remote systems using low earth orbit satellite communications
A method and apparatus for providing command and control of remote systems using low earth orbit satellite communications is disclosed. According to the present invention, a programmable...
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6157834 |
Terrestrial and satellite cellular network interoperability
Interoperability between terrestrial cellular systems and satellite based cellular systems allows handoffs between different cellular systems. A call in progress by a subscriber unit (101) over a...
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6151497 |
Satellite based high bandwidth data broadcast
A satellite based broadcast data communications service for a satellite communications system is presented which allows a data information service provider (40) to send large blocks of data...
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6148196 |
Remote control and location system
A system for transmitting instructions from a master control facility (50) to a number of remotely located player units (11-14). The remotely located player units communicate through a mobile cell...
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6144854 |
Satellite communication system and center station
A satellite communication system capable of notifying an user in speaking that a connection request is transmitted and capable of being implemented at low cost. A satellite communication system in...
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6137441 |
Accurate range and range rate determination in a satellite communications system
The present invention is a system and method for accurately determining the distance (range) between one or more satellites and a user terminal and the rate of change (range rate) of that distance....
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6138012 |
Method and apparatus for reducing signal blocking in a satellite communication system
A communication system is established for providing dual-coverage areas using communication satellites, one or more terrestrial stations and one or more dual-coverage subscriber units (DCSU). The...
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6138013 |
Method for location based intercept in a communication system
A method for providing location based intercept in a satellite communications system (10) includes the steps of determining a location area of a party (220), determining whether the location area...
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6134423 |
Satellite communications system having gateway-based user RF exposure monitoring and control
A method and system wherein a system gateway (18) determines, from closed loop power control information, a power density at an antenna (13a) of a user terminal 13. The gateway also maintains a...
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6133854 |
Satellite supported traffic signal controller
A local traffic signal controller (3) is interfaced to a satellite subscriber unit (10) to provide for centralized control of the traffic signals (1) controlled by the local controller (3). A...
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6134437 |
Dual-mode satellite/cellular phone architecture with physically separable mode
In a dual-mode satellite/cellular phone system, a user has the option of placing or receiving calls to and from the satellite network with either the cellular/PCS phone or the fully self-contained,...
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6128468 |
Satellite communications terminal location system and method
In a satellite communications system, where a satellite 10 provides a plurality of radio beams 30, and where distance and/or angle measurement from a satellite 10 or satellites 10 enables the...
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6128501 |
Mobile position determination with error correction utilizing cellular networks
A position determining system takes the form of a cellular radio system including at least one base station having a base station satellite receiver (6) and a mobile unit including a cellular...
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