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公开(公告)号：JP2000022563A
公开(公告)日：2000-01-21
申请号：JP17128298
申请日：1998-06-18
Applicant: GLOBALSTAR LP
Inventor： WIEDEMAN ROBERT A , JAMAL ISADIAN , VIJAYA GARAGAA
Abstract: PROBLEM TO BE SOLVED: To provide a combination and a utilization method of the advantages of a battery and an HEDC(high energy density capacitor) power source. SOLUTION: A method for operating a satellite communication terminal for transmitting one of digital voice or a data signal in a frame cycle is composed of a step (a) for providing the battery 102, the HEDC 101 and a hybrid power source constituted of a switching circuit for selectively connecting one or both in the terminal, the step (b) for storing prescribed threshold values including a data rate threshold value and a transmitter power level threshold value, the step (c) for comparing a transmission rate to be used in the next frame cycle with at least one of the stored data rate threshold value and power level threshold value and the step (d) for controlling the switching circuit 104 and selecting one or both of the battery and the HEDC 101 connected to the output of a power source in response to the comparison.
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公开(公告)号：JPH10271057A
公开(公告)日：1998-10-09
申请号：JP35103897
申请日：1997-12-19
Applicant: GLOBALSTAR LP
Inventor： WIEDEMAN ROBERT A
Abstract: PROBLEM TO BE SOLVED: To provide a high speed satellite communication system for audio, image, data, for mobile and stationary communication. SOLUTION: A communication system includes at least one low altitude orbit 1st satellite 10, at least one 2nd satellite except on a low altitude orbit, and a ground segment 12 that includes at least one gateway 76 and is connected to a ground communication system accessible to a public network such as a PSTN(public switched telephone network) or an optical fiber network or the like and pluralities of user transceivers 78, 80, 82, 84. The 1st satellite 10 has a 1st, 2nd and 3rd transceivers that are used to communicate with the gateway 76, a user transceiver 78 and the 2nd satellite 11 or the like. The transceivers are connected by a mount processor and a switching matrix relaying communication with the gateway 76 and the user transceivers 78 or the like via the 2nd satellite 11. Pluralities of the user transceivers include data processors interconnected in the network via the 1st satellite.
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公开(公告)号：JPH0969807A
公开(公告)日：1997-03-11
申请号：JP18452596
申请日：1996-07-15
Applicant: GLOBALSTAR LP
Inventor： WIEDEMAN ROBERT A , MONTE PAUL A , SITES MICHAEL J
Abstract: PROBLEM TO BE SOLVED: To provide a method and system for measuring power density in the antenna of a user terminal from closed loop power control information by means of a gateway. SOLUTION: When the gateway 18 judges that power density exceeds a threshold while connection is maintained, connection is terminated before the average transmission power density level of the user terminal 13 exceeds a prescribed threshold level and an absolute threshold level. A heating or visual indicator gives an alarm that present connection is to be terminated soon to a user. In an off period when telephone is inhibited, only the prescribed type of telephone call such as emergency telephone is permitted. A power density monitor function is provided in the user terminal and information is transmitted to the gateway through a return link 17B. A majority decision and other technology is used by the gateway before connection is terminated. In such a case, power density measurement executed in the gateway is given priority and the user terminal is prevented from intentionally or suddenly stopping the power density monitor function.
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公开(公告)号：JPH08335902A
公开(公告)日：1996-12-17
申请号：JP9277696
申请日：1996-04-15
Applicant: GLOBALSTAR LP
Inventor： MONTE PAUL A , WIEDEMAN ROBERT A , SITES MICHAEL J
Abstract: PROBLEM TO BE SOLVED: To provide a method and a system for correctly issuing a demand with respect to the amount of satellite communication system resources to be assigned and used to a user terminal for each speech or connection. SOLUTION: Data, indicating the system resource amount under use both on a forward link from a gateway through a satellite to the user terminal and on a backward link from the user terminal via the satellite to the gateway, are periodically collected during connection. These data to be used contain a power level, data rate, the location of a user terminal and the type of the user terminal. A gateway 18 assigned for making a telephone call to a user terminal 13 integrates data and next transfers the data through a data network 39 on the ground to a ground operation control sensor 38. While using these data, a center determines a tariff which a service provider should demand payment corresponding to a service area, including the gateway. Further, while using these data, the center prepares statistical information expressing communication traffic to be handled by the gateway and derives predicted resource assignment and resource plan information for the gateway.
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公开(公告)号：JPH08335900A
公开(公告)日：1996-12-17
申请号：JP14296696
申请日：1996-06-05
Applicant: GLOBALSTAR LP
Inventor： WIEDEMAN ROBERT A
Abstract: PROBLEM TO BE SOLVED: To maintain an FDM channel and satellite power utilization by improving and optimizing the delivery of pass diversity in a communication system by providing a control means for designating the number of communication signal repeaters, in response to information showing the location of communication signal receiver. SOLUTION: Corresponding to information to be supplied by a user terminal 13 for utilizing a service or information stored in a gateway 18, the transmission of signals from the set of signals of mutually independent plural transmitters, and antennas is selected while being effectively utilized at a maximum under the control of gateway 18. The selection of at least one satellite repeater 12 is based on this information. When at least one transmitters of orbital satellite repeaters 12 receive blocking or violent phasing, reception is improved by recognizing the necessity for almost real-time satellite pass diversity. Therefore, the user terminal 13 can receive signals with sufficient strength and the automatic ending of speech in progressive can be prevented.
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Patent Agency Ranking
公开(公告)号：JPH11284559A
公开(公告)日：1999-10-15
申请号：JP229699
申请日：1999-01-07
Applicant: GLOBALSTAR LP
Inventor： WIEDEMAN ROBERT A
IPC: H04B7/15 , H04B7/00 , H04B7/185 , H04B7/195 , H04M3/42 , H04W84/06 , H04Q7/06 , H04Q7/08 , H04Q7/12
Abstract: PROBLEM TO BE SOLVED: To provide a communication system that allows a user to receive a page message stored by one system between a paging system and a communication system on a satellite base. SOLUTION: A communication system comprises a satellite 105, a ground gateway 103 bidirectionally connected to the satellite 105, a ground paging system 109, and a user device 106 connected to the system 109 by through radio. The gateway is bidirectionally connected to the system 109 via a virtual gateway 107 and a pager interface device 108. The pager interface device has a pager message read system 108A that stores page messages, until it is defined whether or not a page message is distributed well to the device 106 through the system 109. A stored message is later accessed and distributed to a user.
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公开(公告)号：JPH118580A
公开(公告)日：1999-01-12
申请号：JP14359598
申请日：1998-04-15
Applicant: GLOBALSTAR LP
Inventor： WIEDEMAN ROBERT A , MONTE PAUL A
Abstract: PROBLEM TO BE SOLVED: To provide the communication system of single hop connection between a wireless local loop(WLL) terminal and a ground communication system via satellite communication. SOLUTION: A satellite communication equipment segment is provided with a satellite 10 and a ground satellite gateway 6. In the communication system, a local service area 1011 is demarcated for arranging a WLL service area 1107. A ground communication segment, composed of a WLL based station 1105 for bidirectionally communicating with plural WLL user terminals, is further provided with a virtual gateway 1108 to be bidirectionally connected to the satellite. The control of satellite system resources is temporarily assumed, and paging and batch transmission messages are transmitted, while bidirectionally connecting the communication between the respective individuals of WLL user terminals and the WLL service area.
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公开(公告)号：JPH10190550A
公开(公告)日：1998-07-21
申请号：JP28875197
申请日：1997-10-21
Applicant: GLOBALSTAR LP
Inventor： WIEDEMAN ROBERT A
Abstract: PROBLEM TO BE SOLVED: To provide a method for improving a satellite communication system and deciding the presence of attenuation by the weather phenomenon of rain and the like and the amount by using data led out from the signals of various types for leading out an attenuation model relating to the atmosphere. SOLUTION: A user terminal 5 bidirectionally performs communication with a first NGSO satellite or a GSO satellite (called as a satellite 50a collectively). The satellite 50a is present on an orbit on the gate way of a satellite feeder up ring 31a and a satellite feeder down ring 32a and is present on the orbit provided with a down ring 33a between the satellite and the user terminal and an up ring 34a between the user terminal and the satellite. It is possible that all of the signal routes receive the attenuation by the propagation effect of the atmosphere and the like of rain attenuation or the like. In this case, communication ability is obtained by selecting the route of the minimum attenuation or the combination of the routes of the minimum attenuation and evading the route for severely receiving the attenuation and is respectively distributed to desirable satellites 50a, 50b and 50c.
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公开(公告)号：JPH098719A
公开(公告)日：1997-01-10
申请号：JP14296796
申请日：1996-06-05
Applicant: GLOBALSTAR LP
Inventor： WIEDEMAN ROBERT A , SITES MICHAEL J
Abstract: PROBLEM TO BE SOLVED: To reduce a rainfall loss by conducting adaptive closed loop power control and using a down link power monitor. SOLUTION: The satellite communication system includes at least one satellite communication signal repeater 12, at least one ground station 18 sending a feeder link comprising plural communication signals to at least one satellite communication repeater 12, and plural user terminals 13 each of which receives one of user link communication signals from the satellite communication signal repeater. The satellite communication system further includes the closed loop power control system 80 having plural internal loops 84 and an external loop 82. Each inner loop 84 compensates a loss of communication signal caused at least between the user terminal 13 and the satellite communication repeater 12 for one of the user links. Then the external loop 82 compensates a loss of a feeder link caused between the ground station 18 and the satellite communication signal repeater 12 for all the user links.
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公开(公告)号：JPH08331031A
公开(公告)日：1996-12-13
申请号：JP11233996
申请日：1996-05-07
Applicant: GLOBALSTAR LP
Inventor： ROBAATO EI UIIDEMAN
Abstract: PROBLEM TO BE SOLVED: To provide a system and a method which bidirectionally connects 1st and 2nd satellite communication system which operate with different protocols. SOLUTION: A 1st system uses a spread spectrum(SS) code division multiple access(CDMA) technique, and a satellite 12 functions as a repeater. A 2nd system uses a time division multiple access technique, and a protocol conversion unit 70G that is installed on the ground receives communication from either of the 1st and 2nd systems and converts transinformation into transinformation, which is suitable for the other systems. SS-CDMA transinformation is received by the 1st system, converted into a TDMA format, and further transmitted into the 2nd system. Next, communication is sent to a ground station of the 2nd system, after being relayed between at least two satellites and connected to a local public exchange telephone line network.
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