|
Match
|
Document |
Document Title |
|
|
6014372 |
Antenna beam congruency system for spacecraft cellular communications system
A spacecraft-based cellular communications system includes a spacecraft with transmit and receive antennas, each of which produces a plurality of spot beams which, together, provide coverage of the...
|
|
|
6014562 |
Radiotelephone communication systems and methods that map an access request into a predetermined random access channel slot to identify a nearest gateway to a radiotelephone
An access request by a radiotelephone for one of a plurality of radiotelephone traffic channels is mapped into a predetermined one of a repeating series of Random Access CHannel (RACH) slots, based...
|
|
|
6006067 |
Method for a selective call receiver to determine its position and to disregard certain signals from a satellite
A selective call receiver that receives signals transmitted by orbiting satellites uses certain information transmitted by the satellites to calculate an estimate of its position. Using that...
|
|
|
6006084 |
Method and apparatus for providing billing services for a mobile group of communication system users
A method and apparatus used by a communication system (100) to register communication system users which use service provider equipment. Multiple-user and special purpose single-user communication...
|
|
|
5995832 |
Communications system
A cellular communications system is provided have both satellite nodes and surface nodes for providing mobile cellular communications services for a plurality of mobile user units. The surface and...
|
|
|
5995805 |
Decision-theoretic satellite communications system
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...
|
|
|
5979832 |
Dual ring array of satellites
Array of satellites in a planetary gear arrangement. One ring is circular, and within the other ring, which is elliptical. The circular and elliptical rings overlap at a tangent point. At that...
|
|
|
5979830 |
Method and arrangement for keeping a geostationary satellite cluster on a dedicated position by employing an optical intersatellite link
The instant invention comprises a method and arrangement for station keeping a geostationary satellite cluster, employing an optical intersatellite connection constituted of a number of satellites...
|
|
|
5974315 |
Spacecraft cellular communication system
A satellite (S/C) cellular commsystem includes user terminals (UT) for transmitting to, & receiving signals from the S/C, and includes gateways for transmitting to the S/C. The gateways receive and...
|
|
|
5974316 |
System and method for enhancing ring alert terminations
A communication system including a constellation of satellites and a multi-channel unit having a plurality of co-located transceivers operative for exchanging communication information with users,...
|
|
|
5966640 |
Satellite antenna management system and method
The antenna management system and method allow a satellite to communicate with a ground station either directly or by an intermediary of a second satellite, thus permitting communication even when...
|
|
|
5957409 |
Ellipitical satellite system which emulates the characteristics of geosychronous satellites
An elliptical satellite system which carries out communication. The satellite orbits a height above the earth less than that necessary for geosynchronous orbits. When the satellite is near the...
|
|
|
5960324 |
Method for unobtrusive interception of satellite communication
In a satellite communication system, a method of unobtrusively intercepting a communication call includes establishing a first connection to originate from a first satellite subscriber (SU) and...
|
|
|
5953664 |
Expedited visited gateway access methods and systems
Methods (100, 150, 200) and systems (10, 30, 41) are used to expedite access for a period of time for those subscriber units (30) which have previously executed the complete visited gateway access...
|
|
|
5950127 |
Mode switching method for mobile station
The ground base station informs an in-level for the ground system, an out-level from the ground system, a timer value and an edge information indicating the edge of the service area, in addition to...
|
|
|
5949812 |
Method and system for conserving battery reserves in a navigation receiver by slowing and/or stopping the system clock during low demand
A battery-operated navigation satellite receiver with an antenna, a radio frequency stage, a down-converter, a digital signal processor and a microcomputer for demodulating L-band microwave carrier...
|
|
|
5949766 |
Ground device for communicating with an elevated communication hub and method of operation thereof
A method and apparatus for communicating with a high-altitude communication platform (110) which combines multiple signals from multiple sources into one signal which is sent to a ground device...
|
|
|
5946625 |
Method for improving co-channel interference in a cellular system
A fractional loading scheme is used to improve the spectral efficiency of a cellular system, and therefore increase the number of users that the system can support. The fractional loading scheme...
|
|
|
5943608 |
Traffic management methods for mitigation of interference between signals of satellite systems in relative motion
In an environment of competing satellite systems having in part shared bands/channel frequencies and at least one system having non-interfering dedicated bands/channels, interference between shared...
|
|
|
5943606 |
Determination of frequency offsets in communication systems
A method and apparatus for determining frequency offsets caused by oscillator error or Doppler effects in a user terminal (for example, a mobile wireless telephone) in a communication system. The...
|
|
|
5937349 |
Method and system of tracking dynamic communication parameters during a link interruption
In a dynamic communication system (90) wherein communication parameters vary appreciably between transmissions, mobile subscriber units (200) are susceptible to link blockages resulting in a loss...
|
|
|
5930679 |
Satellite-based ring alert apparatus and method of use
A satellite communication system provides users with global cellular coverage. To facilitate delivery of calls to users having subscriber units, a fixed channel is defined wherein subscriber units...
|
|
|
5924015 |
Power control method and apparatus for satellite based telecommunications system
A power control method and apparatus are provided for a satellite based telecommunications system. The system includes a power control subsystem which is operative with systems operations center...
|
|
|
5920804 |
Method and apparatus for communications hand-off between multiple satellite systems
A method and apparatus for handing off communications between a primary satellite system (500) and an alternate satellite system (550) determines (602) when a hand-off condition for the primary...
|
|
|
5918161 |
Method and apparatus for reducing multipath signal error using deconvolution
A deconvolution approach to adaptive signal processing has been applied to the elimination of signal multipath errors as embodied in one preferred embodiment in a global positioning system...
|
|
|
5918175 |
Method and apparatus for registering mobile user groups
A multiple subscriber unit (MSU) (600) is co-located with a mobile vehicle (110) and is coupled to multiple communication units (620) which can be used by MSU users to establish communication links...
|
|
|
5918174 |
Circuitry and method for initiating communication between communication stations of a radio communication system
A method and associated circuitry for initiating communication between a network station and a user terminal of a radiotelephonic communication system, such as a satellite-cellular communication...
|
|
|
5915217 |
Worldwide telecommunications system using satellites
A wireless telephone system (10) capable of servicing a roaming wireless telephone user (30) includes a satellite (22) communications system consisting of at least one orbiting satellite (22); at...
|
|
|
5912878 |
Method and end station with improved user reponse time in a mobile network
A method and apparatus of improving user response time during cellular hand-offs and radio frequency changes in a Transmission Control Protocol/Internet Protocol (TCP/IP) mobile environment. In the...
|
|
|
5913164 |
Conversion system used in billing system for mobile satellite system
In a mobile satellite system, a mobile communication system includes a system for managing a mobile satellite system and a mobile communication system responsively connected thereto for...
|
|
|
5907541 |
Architecture for an integrated mobile and fixed telecommunications system including a spacecraft
A communication system (10) includes a plurality of fixed terrestrial gateway terminals (14) and fixed village terminals (18), and also includes a plurality of mobile user terminals (16). The...
|
|
|
5905957 |
Method and apparatus for management of automatically initiated communication
A communication system (10) includes a population of mobile units (24) which communicate with a control station. Communications take place between the control station and the mobile units (24) so...
|
|
|
5905941 |
Television signal cable distribution installation
A television signal distribution network includes respective distributor cables for signals from respective satellite antennas, one of such cables also being coupled to a terrestrial signal source...
|
|
|
5903836 |
Satellite communication charging system
A satellite communication charging system is arranged between a parent station apparatus and child stations installed in a plurality of areas. A plurality of pay phone sets are respectively...
|
|
|
5903603 |
Modem training apparatus and method
A secure communications system (501) including a local digital terminal (510) coupled to an interworking function (538). The interworking function (538) couples the digital radio network (121) to a...
|
|
|
5903837 |
Wireless telephone/satellite roaming method
A wireless telephone system capable of servicing a roaming wireless telephone user includes a satellite communications system consisting of one or more orbiting satellites, each carrying a database...
|
|
|
5890679 |
Medium earth orbit communication satellite system
A Medium Earth Orbit (MEO) satellite constellation comprising two satellite subconstellations. Each of the two satellite subconstellations comprises three cross-linked satellites. The cross-linked...
|
|
|
5887257 |
Hybrid constellation satellite comunication systems and methods with efficient signaling and control
A hybrid constellation satellite communication system (100) is established using two or more satellite types (110, 120) in different constellations. The two or more satellite types (110, 120) are...
|
|
|
5881367 |
Method of regulating the power of a signal transmitted by a first station to a second station in a satellite telecommunication network
In a telecommunication network, the power of a first signal transmitted via a satellite by a first station to be received in the form of a second signal by a second station is regulated. At a given...
|
|
|
5875402 |
Time-synchronous communication system
A time-synchronous communication system comprises: fixed stations having distance measuring/time reference synchronization and maintaining unit, receiving/processing unit, transmitting/processing...
|
|
|
5867783 |
Medium-earth-altitute satellite-based cellular telecommunications
A satellite-based cellular telecommunications system employing a constellation of telecommunications satellites in medium earth orbit to provide multibeam radio frequency (rf) communications links...
|
|
|
5867765 |
Non-geostationary satellite mobile communication system integration with network principles for terrestrial cellular
A non-geostationary satellite communication system comprises a cellular system controller, a satellite system controller, and a management controller. The cellular system controller assigns each...
|
|
|
5860058 |
Method and apparatus for routing signals through a communication system having multiple destination nodes
A method and apparatus for routing signals through a system (10) which has multiple destination nodes (12, 14) assigns one or more unique carrier frequencies to each destination node (12, 14). When...
|
|
|
5857193 |
Centralized audiotext polling system
A data transfer system for transferring between a plurality of data storage devices is provided. A data transfer request system requests scheduled and unscheduled data transfers between respective...
|
|
|
5852779 |
System and method for having a single gateway set-up and maintain local signalling connections
A system (10) and method (100) selects one of the gateways (40, 41) to set-up and maintain signalling resources associated with a call. Instead of having two gateways (40, 41) handle signalling...
|
|
|
5839053 |
System for transmitting radio signals from mobile terminals to provide space diversity for uplink signals via geostationary communication satellites
The invention concerns a system for transmission of spatial diversity radio signals via a geostationary main communication satellite and one or more auxiliary satellites "colocated" in the same...
|
|
|
5839068 |
Method of delivering service voice announcements in a satellite telephony communication system
A satellite telephony communication system is used to provide a method of delivering service voice announcements to remote ground transceivers in the satellite telephony system. A relatively small...
|
|
|
5832379 |
Communications system including control means for designating communication between space nodes and surface nodes
A cellular communications system is provided have both satellite nodes and surface nodes for providing mobile cellular communications services for a plurality of mobile user units. The surface and...
|
|
|
5828952 |
System and method for executing signalling cut-through
A system (10) and method (100) reduce an amount of signalling resources used for calls involving more than one gateway (40, 41). Instead of having two gateways (40, 41) handle signalling resources,...
|
|
|
5822680 |
Frequency sharing for satellite communication system
A communication system and methods for sharing a common communication frequency, without interfering with a second communication system which has a plurality of satellites operating in...
|