[특허]Communication system employing reuse of satellite spectrum for terrestrial communication

[미국특허] Communication system employing reuse of satellite spectrum for terrestrial communication 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04Q-007/20
출원번호	US-0623085 (2003-07-18)
발명자 / 주소	Mayfield,William W. Chang,Donald C. D. Novak, III,John I.
출원인 / 주소	The DirecTV Group, Inc.
인용정보	피인용 횟수 : 9 인용 특허 : 20

초록 ▼

A terrestrial communication system using satellite uplink and downlink frequencies is disclosed. A terrestrial cell site produces a signal at a satellite uplink frequency that is transmitted to a terrestrial user terminal. The terrestrial cell site receives a signal at a satellite downlink frequency that was transmitted by a terrestrial user terminal. The terrestrial cell site may include a signal nulling means in the direction of a satellite producing signals at the uplink and downlink frequencies.

대표청구항 ▼

What is claimed is: 1. A terrestrial communication system using satellite uplink and downlink frequencies used by satellites, comprising: at least one terrestrial user terminal transmitting, without using said satellites, a first signal on at least one satellite downlink frequency and receiving, without using said satellites, a second signal on at least one satellite uplink frequency, wherein the first signal frequency is different than the second signal frequency. 2. The terrestrial communication system of claim 1, wherein said terrestrial communication system includes a signal nulling means in the direction of said satellites that produces signals using said uplink and said downlink frequencies. 3. A terrestrial communication system using satellite uplink and downlink frequencies used by satellites, comprising: a terrestrial terminal unit producing a first signal at a satellite downlink frequency that is transmitted without using said satellites within the terrestrial communication system, and said terrestrial terminal unit receiving a second signal at a satellite uplink frequency different than the satellite downlink frequency that was transmitted without using said satellites from within the terrestrial communication system. 4. The terrestrial communication system of claim 3, wherein a satellite ground user using said uplink and said downlink frequencies is geographically isolated from said terrestrial terminal unit. 5. A method of minimizing interference between terrestrial user communications and satellite user communications, comprising: reversing the transmission frequency band and reception frequency band for the terrestrial user relative to the satellite user, wherein the reception frequency bands are different than the transmission frequency band. 6. The method of claim 5, further comprising generating at least one pattern null with an antenna to reduce satellite interference. 7. A method of reusing satellite spectrum for terrestrial communications, comprising: assigning satellite frequency bands so that terrestrial users and satellite users on the ground within the same geographic region are using different satellite uplink and downlink bands; and adding pattern nulls to terrestrial antennas, that transmit and receive signals from terrestrial users, to block satellite interference. 8. The method of claim 7 wherein the step of assigning comprises assigning transmission and reception bands to terrestrial users, wherein the transmission and reception bands are satellite downlink and uplink.

이 특허에 인용된 특허 (20) 인용/피인용 타임라인 분석

Tawil Saleem ; Tawil Carmen, Apparatus and method for facilitating terrestrial transmissions at frequencies also used for satellite transmissions to a common geographic area.
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Tawil Carmen ; Tawil Saleem, Apparatus and method for processing signals selected from multiple data streams.
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Tawil Carmen ; Tawil Saleem, Apparatus and method for reusing satellite broadcast spectrum for terrestrially broadcast signals.
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Tawil Carmen ; Tawil Saleem, Apparatus and method for transmitting terrestrial signals on a common frequency with satellite transmissions.
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Dent Paul W.,SEX, Cellular/satellite communications system with improved frequency re-use.
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Schmidt William George, Digital speech interpolation method and apparatus.
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Karabinis Peter D., Fixed and mobile satellite radiotelephone systems and methods with capacity sharing.
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Schiff Leonard N. ; Miller David S., Method and apparatus for adjacent coverage area handoff in communication systems.
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Frey Richard L. (Duanesburg NY) Gaus ; Jr. Richard C. (Burnt Hills NY) George ; II Robert L. (Plano TX) Hladik Stephen M. (Albany NY) Lester Howard L. (Auplaus NY) Puckette Charles M. (Scotia NY) Ray, Method and apparatus for reducing interference among cellular telephone signals.
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Martinez ReneD. (Newfield NY) Compton Richard C. (Ithaca NY), Method and apparatus for spectrum sharing between satellite and terrestrial communication services using temporal and sp.
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Ray Jimmy C. (Denison TX) George ; II Robert L. (Plano TX) Levine Richard C. (Richardson TX), Mobile telecommunications for aircraft and land based vehicles.
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Ray J. C. ; George Robert L. ; Hoppe Geoffrey A. ; Jones Stephen S. ; McKenna Daniel B., Multidimensional cellular mobile telecommunication system.
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Ray J. C. ; George Robert L. ; McKenna Daniel B., Non-terrestrial cellular mobile telecommunication station.
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Karabinis Peter D., Satellite telecommunications repeaters and retransmission methods.
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Paneth Eric,ILX ; Handzel Mark J. ; Morley Steven Allan ; Avis Graham M., Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or.
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Otten David D. (Redondo Beach CA), System and method for mobile communications in coexistence with established communications systems.
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Tawil Saleem (Austin TX), System for providing local originating signals with direct broadcast satellite television signals.
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Daniel B. McKenna ; Scott P. Gregoire ; Jerry H. Polson, Ubiquitous mobile subscriber station.
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Haugli Hans-Christian,CAX ; Seed William Robert,CAX, Wireless packet data distributed communications system.
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Wiedeman Robert A. ; Monte Paul A., Worldwide telecommunications system using satellites.
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이 특허를 인용한 특허 (9) 인용/피인용 타임라인 분석

Dankberg, Mark D.; Miller, Mark J.; Jaska, Kristi; Wilson, Robert, Adaptive use of satellite uplink bands.
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Dankberg, Mark D.; Miller, Mark J.; Jaska, Kristi; Wilson, Robert, Frequency re-use for service and gateway beams.
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Dankberg, Mark D.; Miller, Mark J.; Jaska, Kristi; Wilson, Robert, Frequency re-use for service and gateway beams.
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Dankberg, Mark D.; Miller, Mark J.; Jaska, Kristi; Wilson, Robert, Frequency re-use for service and gateway beams.
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Wasden, Mitchell B.; Arya, Vishal; St. Laurent, Darren M.; Tellez, Charles S., Method and system for testing an integrated receiver decoder with signals from outside the local market area.
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Dankberg, Mark D.; Miller, Mark J.; Hart, Steven R.; Jaska, Kristi; Wilson, Robert, Placement of gateways away from service beams.
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Miller, Mark J., Placement of gateways near service beams.
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Karabinis, Peter D., Radiotelephones and operating methods that use a single radio frequency chain and a single baseband processor for space-based and terrestrial communications.
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Dankberg, Mark D.; Miller, Mark J.; Hart, Steven R.; Jaska, Kristi; Wilson, Robert, Satellite architecture.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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[미국특허] Communication system employing reuse of satellite spectrum for terrestrial communication 원문보기