[미국특허]
Satellite communication system providing multi-gateway diversity to a mobile user terminal
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H04B-007/185
H04Q-007/20
출원번호
US-0114985
(1998-07-14)
발명자
/ 주소
Wiedeman, Robert A
Monte, Paul A
출원인 / 주소
Globalstar L.P.
대리인 / 주소
Ohlandt, Greeley, Ruggerio & Perle, LLP
인용정보
피인용 횟수 :
8인용 특허 :
53
초록▼
Disclosed herein is a method for operating a satellite communications system as well as a method for providing a larger effective gateway coverage area, and a system that operates in accordance with the methods. The methods include steps of (a) establishing a call connection between a terrestrial te
Disclosed herein is a method for operating a satellite communications system as well as a method for providing a larger effective gateway coverage area, and a system that operates in accordance with the methods. The methods include steps of (a) establishing a call connection between a terrestrial telecommunications network and a user terminal via a first gateway and at least one satellite; and (b) while the call connection is established, coupling the user terminal to the terrestrial telecommunications network via a second gateway and at least one further satellite. The step of coupling includes a step of conveying call speech or data information between the first gateway and the second gateway over an inter-gateway communications link. By so linking multiple gateways each gateway experiences an increase in its effective coverage area, as an on-going call can be continued even after a user terminal moves from a first gateway's coverage area into a second gateway's coverage area.
대표청구항▼
Disclosed herein is a method for operating a satellite communications system as well as a method for providing a larger effective gateway coverage area, and a system that operates in accordance with the methods. The methods include steps of (a) establishing a call connection between a terrestrial te
Disclosed herein is a method for operating a satellite communications system as well as a method for providing a larger effective gateway coverage area, and a system that operates in accordance with the methods. The methods include steps of (a) establishing a call connection between a terrestrial telecommunications network and a user terminal via a first gateway and at least one satellite; and (b) while the call connection is established, coupling the user terminal to the terrestrial telecommunications network via a second gateway and at least one further satellite. The step of coupling includes a step of conveying call speech or data information between the first gateway and the second gateway over an inter-gateway communications link. By so linking multiple gateways each gateway experiences an increase in its effective coverage area, as an on-going call can be continued even after a user terminal moves from a first gateway's coverage area into a second gateway's coverage area. ch other, for recirculating liquid leaving the heating unit to one of the reservoir or the inlet side of the pump when the liquid has not reached the predetermined temperature, the recirculation device also being controlled based on the temperature of the liquid leaving the heating unit; and a rated valve on the heated liquid outlet. 2. The device according to claim 1, wherein the control device and the recirculating device are combined into a single unit, and further comprising a thermostatic element which reacts in response to the temperature of the liquid leaving the heating unit to control the operation of the control and recirculation devices to assure that heated liquid is delivered at the preselected temperature. 3. The device according to claim 1 the first part is formed of a first body comprising an inlet for liquid delivered by the pump, an outlet for liquid to pass to the heating body, and a flow control nozzle having a structure which can alter liquid flow to the heating unit. 4. A device for the continuous heating of a liquid to a constant temperature, the device comprising a reservoir of an ambient temperature liquid, a pump having an inlet and outlet, a heating unit, a heated liquid outlet for delivering heated liquid at a preselected temperature, a control device for regulating flow of liquid delivered by the pump to the heating unit, the control device being controlled based on the temperature of the liquid leaving the heating unit, a recirculation device for recirculating liquid leaving the heating unit to one of the reservoir or the inlet side of the pump when the liquid has not reached the predetermined temperature, the recirculation device also being controlled based on the temperature of the liquid leaving the heating unit; wherein the control device and the recirculating device are combined into a single unit, the single unit comprising a first part formed of a first body comprising an inlet for liquid delivered by the pump, an outlet for liquid to pass to the heating body, and a flow control nozzle having a structure which can alter liquid flow to the heating unit and a shut-off nozzle, and a second part comprising and a second part comprising a second body coaxial with, secured to and thermally insulated from the first body, an inlet that receives liquid leaving the heating unit, a chamber that is in fluid association with the second body inlet to receive liquid therefrom, the chamber further being in fluid association with the heated liquid outlet and being connected, via the shut-off nozzle, to a recirculation outlet that is in fluid association with the pump inlet, and the chamber housing the thermostatic element and a rated valve on the heated outlet, and a thermostatic element which reacts in response to the temperature of the liquid leaving the heating unit to control the operation of the control and recirculation devices to assure that heated liquid is delivered at the preselected temperature. 5. The device according to claim 4, wherein the thermostatic element includes a piston, and the combined control/recirculation unit includes a first bore in the first part of the unit, second, larger bore in the second body of the unit, a rod member having a body which is slidably received in the first bore and a head that is of larger size than the body that is received in the second bore, and a spring operatively associated with the rod head and thermostatic element, such that the piston acts on the rod head against the action of the spring to position the rod in the respective first and second bores depending upon the temperature of the liquid therein so that the nozzles can direct the liquid to achieve the predetermined temperature prior to allowing the heated liquid to exit the heated liquid outlet. 6. The device according to claim 5, wherein the first body comprises an inlet chamber in fluid association with the pump inlet and an output chamber in fluid association with the heated liq uid outlet, and the nozzle includes a radial slot opening onto the periphery of the rod, the cross section of which varies along the longitudinal axis of the rod, this slot making it possible, depending on the axial position of the rod, for the inlet chamber to be connected to the outlet chamber by passages of different cross sections, and in that when the rod is in the position of rest, the passage cross section is at a minimum. 7. The device according to claim 6, which further comprises first and second seals operatively associated with the rod and being located in the first and second bodies, respectively. 8. The device according to claim 4, wherein the rod head includes a radial milling opening on its periphery and over part of its length which, depending upon the axial position of the rod head in the second bore, either fluidly connects the chamber of the second body to the recirculation outlet or prevents such fluid connection. 9. The device according to claim 8, wherein the second seal is located between the chamber and the recirculation outlet. 10. The device according to claim 1, which further comprises a switch, with the heating unit having an electrical power supply that is controlled by the switch, and wherein the temperature sensor is operatively associated with the switch. 11. The device according to claim 1, wherein the heating unit has low thermal inertia, the liquid is water and the heated liquid outlet is in fluid association with a percolator for brewing coffee. 12. The device according to claim 2, wherein the thermostatic element is of the wax cartridge type, liquid vaporization type, is based on a shape-memory metal or is based on a metal having a high coefficient of expansion to facilitate axial displacement. 13. The device of claim 2, which further comprises a temperature sensor mounted on the recirculation device for controlling electrical power to the pump. 14. The device according to claim 3, wherein the flow control nozzle includes a passage having a variable cross-section for regulating the flow rate of liquid delivered to the heating unit continuously or in discrete increments. 15. A method for the continuous heating of a liquid to a constant preselected temperature, which comprises delivering a quantity of ambient temperature liquid to a heating unit for heating of same, delivering the heated liquid to a recirculation device comprising a first part and a second part, wherein the first part and the second part are thermally insulated from each other, and the heated liquid is delivered to one of the first or second parts for sensing the temperature of the heated liquid leaving the heating unit to determine if it has achieved the preselected temperature, and delivering heated liquid that has achieved the preselected temperature. 16. The method of claim 15, which further comprises recirculating the heated liquid to the heating unit until the heated liquid has achieved the preselected temperature. 17. The method of claim 16, wherein the liquid is delivered by a pump to a heating unit that has low thermal inertia, and the heated liquid is recirculated to the pump if the preselected temperature is not achieved. 18. The method according to claim 15, wherein the delivery of liquid to the heating unit is regulated to a minimum value that is significantly below that which represents an amount of liquid that can be heated to the preselected temperature by the heating unit, until the heated liquid achieves the preselected temperature. 19. The method according to claim 18, wherein, when the temperature of the liquid leaving the heating unit is sensed as meeting or exceeding the preselected temperature, the delivery of liquid to the heating unit is increased. 20. The method according to claim 17, wherein the sensing of the liquid temperature is utilized to control the flow of liquid from the pump to the heating unit as well as for the recirculation of the heated liquid to the pump. 21. The method of claim 20 whe
Crosbie Jeffrey S. (Chandler AZ) Baum David M. (McLean VA) Krutz Michael W. (Chandler AZ), Communication network with flexible handoff scheduling for mobile nodes.
Stengel Robert E. (Fort Lauderdale) Davenport Roger A. (Fort Lauderdale FL), Communication system capable of adjusting transmit power of a subscriber unit.
Gilhousen Klein S. (San Diego CA) Padovani Roberto (San Diego CA) Wheatly ; III Charles E. (Del Mar CA), Diversity receiver in a CDMA cellular telephone system.
Yan Tsun-Yee (Northridge CA) Rafferty William (Pasadena CA) Dessouky Khaled I. (Santa Monica CA) Wang Charles C. (Arcadia CA) Cheng Unjeng (Laguna Niguel CA), Land-mobile satellite communication system.
Horstein Michael (Los Angeles CA) Cress Peter H. (Manhattan Beach CA) Rusch Roger J. (Palos Verdes Estates CA), Medium-earth-altitude satellite-based cellular telecommunications.
Gilhousen Klein S. (San Diego CA) Padovani Roberto (San Diego CA) Wheatley ; III Charles E. (Del Mar CA), Method and apparatus for controlling transmission power in a CDMA cellular mobile telephone system.
Gilhousen Klein S. (San Diego CA) Padovani Roberto (San Diego CA) Wheatley ; III Charles E. (Del Mar CA) Weaver ; Jr. Lindsay A. (San Diego CA) Blakeney ; II Robert D. (San Diego CA), Method and apparatus for controlling transmission power in a CDMA cellular mobile telephone system.
Wild Johanna Alexandra ; Tayloe Daniel Richard ; Bishop ; Jr. James William ; Robinson William Neil,GBX, Method and apparatus for managing service accessibility between differing radio telecommunication networks.
Gilhousen Klein S. (San Diego CA) Padovani Roberto (San Diego CA) Wheatley ; III Charles E. (Del Mar CA), Method and system for providing a soft handoff in communications in a CDMA cellular telephone system.
Monte Paul A. (San Jose CA) Wiedeman Robert A. (Los Altos CA) Sites Michael J. (Fremont CA), Method for accounting for user terminal connection to a satellite communications system.
Blakeney ; II Robert D. (San Diego CA) Karmi Gadi (San Diego CA) Tiedemann ; Jr. Edward G. (San Diego CA) Weaver ; Jr. Lindsay A. (San Diego CA), Mobile station assisted soft handoff in a CDMA cellular communications system.
Wiedeman Robert A. (Los Altos CA) Monte Paul A. (San Jose CA) Carter Stephen S. (San Diego CA) Ames William (Poway CA), Multiple satellite repeater capacity loading with multiple spread spectrum gateway antennas.
Olds Keith A. (Mesa AZ) Redden James P. (Mesa AZ) Kurby Christopher (Elmhurst IL), Satellite cellular communication methods for performing cell-to-cell handoff.
Bertiger Bary R. (Scottsdale AZ) Leopold Raymond J. (Chandler AZ) Peterson Kenneth M. (Tempe AZ), Satellite cellular telephone and data communication system.
Wiedeman Robert A. (Los Altos CA) Monte Paul A. (San Jose CA), Satellite telecommunications system using network coordinating gateways operative with a terrestrial communication syste.
Gilhousen Klein S. (San Diego CA) Jacobs Irwin M. (La Jolla CA) Weaver ; Jr. Lindsay A. (San Diego CA), Spread spectrum multiple access communication system using satellite or terrestrial repeaters.
Mangulis Visvaldis (E. Brunswick NJ) Schiff Leonard N. (Lawrenceville NJ), Synchronizing system for spread spectrum transmissions between small earth stations by satellite via an intermediate hop.
Gilhousen Klein S. (San Diego CA) Jacobs Irwin M. (La Jolla CA) Padovani Roberto (San Diego CA) Weaver ; Jr. Lindsay A. (San Diego CA) Viterbi Andrew J. (La Jolla CA), System and method for generating signal waveforms in a CDMA cellular telephone system.
Gilhousen Klein S. (San Diego CA) Jacobs Irwin M. (La Jolla CA) Padovani Roberto (San Diego CA) Weaver ; Jr. Lindsay A. (San Diego CA) Wheatley ; III Charles E. (Del Mar CA) Viterbi Andrew J. (La Jol, System and method for generating signal waveforms in a CDMA cellular telephone system.
Monte, Paul A.; Bravo, Alfonso; Beech, Johnathan, Method and apparatus for transmitting message from short-range wireless device over a satellite network.
Agrawal,Prathima; Baba,Shinichi; Maeda,Tadahiko; Zhang,Tao, Method, system and circuitry for soft handoff in internet protocol-based code division multiple access networks.
Monte, Paul A.; Santiago, Michael; Miller, Robert D.; Biggs, David Homer; Sutton, Mark Edward; Debus, Walter; Rouquette, Robert; Tanner, Ronnie Daryl, Simplex personal and asset tracker.
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