US20050032545A1 - Fixed wireless back haul for mobile communications using stratospheric platforms - Google Patents
Fixed wireless back haul for mobile communications using stratospheric platforms Download PDFInfo
- Publication number
- US20050032545A1 US20050032545A1 US10/931,861 US93186104A US2005032545A1 US 20050032545 A1 US20050032545 A1 US 20050032545A1 US 93186104 A US93186104 A US 93186104A US 2005032545 A1 US2005032545 A1 US 2005032545A1
- Authority
- US
- United States
- Prior art keywords
- platform
- communications
- base unit
- signal
- recited
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/18502—Airborne stations
- H04B7/18504—Aircraft used as relay or high altitude atmospheric platform
Definitions
- the present invention relates generally to wireless communications and, more particularly, to a wireless communications system that uses a high altitude communication device.
- stratospheric platforms are currently under development.
- One such stratospheric platform is Helios that is being developed by AeroVironment.
- the Helios stratospheric platform is an unmanned vehicle that can fly for several months at a height of about 60,000 feet.
- Helios is a solar powered electric plane that is modular in design and may be configured to carry a variety of payloads.
- Stratospheric platforms have numerous advantages including that capacity can be concentrated over a populated area, transmission delays associated with geostationary satellites are significantly reduced, the power required for transmitting and receiving is substantially smaller than satellites, and the elevation angles of the system are compared to satellites and thus, if a need increases, the system capability may be increased.
- a plurality of base stations are used to communicate with terrestrial-based users.
- the base stations require either terrestrial microwave links or fiber links that communicate with a central switching location.
- the growth of mobile communication systems is ever increasing. However, to keep up with demand, new cell sites must be added particularly in urban areas. However, it is increasingly difficult to add new cell sites in urban areas.
- a communications system comprising a plurality of cells having a base unit therein. Each of the base units communicates with a plurality of users.
- a communication platform located in a stratospheric location is used for transmitting and receiving information from the base units.
- a gateway communicates with the platform and couples the user terminals with a terrestrial-based network through the communications platform and the base units.
- a method of operating a communications system comprises the steps of:
- the gateway may transmit the first signal from the gateway ground station to a terrestrial-based network or the first signal may be transmitted back to the stratosphere platform and routed to another terminal through the same or a different base unit.
- One advantage of the invention is that high-speed access to the Internet or other terrestrial networks may be obtained.
- Another advantage of the invention is that a wireless system may be expanded rapidly without having to provide a fixed communication between a gateway center and any additional cell sites.
- FIG. 1 is a system diagrammatic view of the communication system according to the present invention.
- a communications system 10 has a cellular pattern 12 that is illustrated as a plurality of hexagons on the earth's surface.
- the hexagons represent cells 14 .
- Each cell 14 represents a geographic area that can receive a signal with a predetermined signal strength from a base unit 16 of a cellular tower 18 .
- Each base unit 16 has a transmitting and receiving antenna 20 positioned thereon for transmitting and receiving signals from a platform 22 .
- each cell 14 is illustrated as a hexagon, the edges of the cells are not physical boundaries and may vary depending on the positions and strength of the signals from cellular tower 18 .
- Platform 22 communicates with each base unit 16 , a platform operations center 24 , and a gateway station 26 . Each communication link between platform 22 and base unit 16 , platform 22 and gateway station 26 , platform 22 and platform operations center 24 , and user terminals 28 and base unit 16 is described below.
- a plurality of microcells 30 may also be established within various locations of the cellular pattern 12 .
- building 32 may contain a microcell 30 therein.
- Microcell 30 may have a microcell base unit 34 that has an antenna 36 for communicating with platform 22 .
- the microcell base unit 34 may also have an antenna that is used to transmit and receive wireless information from within building 32 .
- a plurality of microcells 30 may be established in various locations throughout the cellular pattern 12 and more particularly within various buildings within the cellular pattern 12 .
- Microcell 30 acts as an additional sub-cell within a cell.
- Platform 22 is preferably a stratosphere-based platform that remains substantially stationary relative to a geographic region on the earth.
- the platform 22 is controlled by platform operations center 24 to fly in a small radius flight path over a given spot on the earth.
- Various numbers of platforms may be used to cover a predetermined geographic region.
- Each platform 22 is used as a communications node between gateway station 26 and base units 16 , 34 .
- the base units 16 , 34 have their respective antennas 20 , 36 pointed toward the location of platform 22 .
- Gateway station 26 has an antenna 38 pointed toward platform 22 .
- the beam width of the antennas is wide enough to maintain communications link with platform 22 throughout the flight path 22 .
- Gateway 26 is coupled to various terrestrial networks 40 such as a public service telephone network or various Internet providers.
- User terminals 28 have access to terrestrial networks 40 through base units 16 , 34 and platform 22 .
- Platform operations center 24 acts as a control station for platform 22 and other platforms throughout system 10 .
- Platform operations center 24 provides control functions, such as attitude control, attitude management and replacement of parts and/or platforms 22 throughout system 10 .
- Platform operations center 24 determines when and if a specific platform 22 needs repair, replacement, or maintenance functions performed by monitoring the status of one or more platforms 22 in system 10 .
- the antennas used by platform 22 , base units 16 , 34 and gateway 26 allow for large data throughput in the present invention. Since there is shorter physical distance between the user terminals 28 and the terrestrial networks 40 than in satellite-based systems, larger amounts of data at a larger data rate may be provided.
- the communications payload on platform 22 may, for example, be a simple transponder design connecting the base units 16 , 34 to gateway station 26 .
- Various types of encoding schemes may be incorporated such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), or combinations of these schemes to overcome interference caused by the worst case platform motions.
- CDMA code division multiple access
- TDMA time division multiple access
- FDMA frequency division multiple access
- Various frequencies may be used depending on the system requirements for communication between user terminals and base unit 16 , 34 , between base unit 16 and platform 22 , and, between platform 22 and gateway station 26 .
- the base units 34 of microcells 30 preferably transmit at a frequency that does not interfere or otherwise block signals from within the cell 14 that it transmits.
- microcell base unit 34 may transmit at a lower power than base unit 16 of cells 14 . This allows the signals of the microcell base units 34 to be directed into a narrow region such as a building.
- signals from user terminals 28 are transmitted to base unit 16 .
- the base unit 16 transmits the signal to platform 22 .
- Platform 22 transmits the signal to gateway station 26 .
- Gateway 26 receives the signal and determines whether the signal is an in-network signal or whether the signal is outside of the network. If the signal is within the network, the gateway station transmits the signal back to the platform 22 .
- the platform 22 routes the signal to the appropriate base unit 16 which in turn transmits a signal to the appropriate user terminal to which the call should be routed. If the signal is an out-of-network signal, the gateway station 26 routes the signal to the terrestrial networks 40 .
- the microcells 30 work in a similar manner to that with respect to cells 14 . That is, the user terminals within the microcells such as building 32 transmit signals to a microcell base unit 34 .
- the microcell base unit 34 transmits the signal to the platform 22 . The rest of the operation is the same as that described above.
- the present invention advantageously allows the wireless services to be expanded rapidly without having to provide fixed connection between the base unit 16 , 34 and the gateway station 26 .
- This link is often referred to as a “back haul.”
- the total system capacity is scalable by increasing the number of platforms associated with the system. Thus, large geographic areas may be covered with several platforms and several gateway stations.
Abstract
A method and system for communicating includes a plurality of cells having base units therein. Each of the base units communicates with a plurality of users within the cells. A communications platform is located in a stratospheric location for transmitting and receiving information with respect to the base units. A gateway station communicates with the communications platform and routes signals to terrestrial networks or other user back through the communications platform. A microcell within at least one of the cells is used to provide coverage in a small geographic area such as within a building. Each of the microcells is also in communication with the gateway station through the platform.
Description
- The present application is a continuation of U.S. patent application Ser. No. 09/615,894, filed Jul. 14, 2000, entitled “Fixed Wireless Back Haul For Mobile Communications Using Stratospheric Platforms”, and incorporated by reference herein.
- The present invention relates generally to wireless communications and, more particularly, to a wireless communications system that uses a high altitude communication device.
- In this communication age, content providers are increasingly investigating ways in which to provide more content to users as well as interfacing with a larger group of users. The latest communications systems use digital broadcast satellites to broadcast to users in a forward direction. System operators have recognized that user requests are relatively small in terms of data compared to the amount of data broadcast from the satellite. Thus, for example, in the DirecTV® system, user requests are transmitted through telephone lines and programming is provided to the users via satellite.
- In addition to satellites, stratospheric platforms are currently under development. One such stratospheric platform is Helios that is being developed by AeroVironment. The Helios stratospheric platform is an unmanned vehicle that can fly for several months at a height of about 60,000 feet. Helios is a solar powered electric plane that is modular in design and may be configured to carry a variety of payloads. Stratospheric platforms have numerous advantages including that capacity can be concentrated over a populated area, transmission delays associated with geostationary satellites are significantly reduced, the power required for transmitting and receiving is substantially smaller than satellites, and the elevation angles of the system are compared to satellites and thus, if a need increases, the system capability may be increased. In terrestrial-based cellular phone systems, a plurality of base stations are used to communicate with terrestrial-based users. The base stations require either terrestrial microwave links or fiber links that communicate with a central switching location. The growth of mobile communication systems is ever increasing. However, to keep up with demand, new cell sites must be added particularly in urban areas. However, it is increasingly difficult to add new cell sites in urban areas.
- It would therefore be desirable to provide a wireless communication that allows easy expansion services to new users and the capability of adding additional capacity in high usage areas.
- It is therefore one object of the present invention to provide a terrestrial wireless network that is easily expandable.
- In one aspect of the invention, a communications system comprising a plurality of cells having a base unit therein. Each of the base units communicates with a plurality of users. A communication platform located in a stratospheric location is used for transmitting and receiving information from the base units. A gateway communicates with the platform and couples the user terminals with a terrestrial-based network through the communications platform and the base units.
- In a further aspect of the invention, a method of operating a communications system comprises the steps of:
-
- sending first communication signal from a first user terminal to a base unit;
- sending the first signal from the base unit to a stratosphere-based communications platform;
- transmitting the first signal from the stratosphere-based communications platform to a gateway ground station
- In a further aspect of the invention, the gateway may transmit the first signal from the gateway ground station to a terrestrial-based network or the first signal may be transmitted back to the stratosphere platform and routed to another terminal through the same or a different base unit.
- One advantage of the invention is that high-speed access to the Internet or other terrestrial networks may be obtained. Another advantage of the invention is that a wireless system may be expanded rapidly without having to provide a fixed communication between a gateway center and any additional cell sites.
- Other objects and features of the present invention will become apparent when viewed in light of the detailed description of the preferred embodiment when taken in conjunction with the attached drawings and appended claims.
-
FIG. 1 is a system diagrammatic view of the communication system according to the present invention. - In the following description, those skilled in the art would recognize that other embodiments and structural changes may be made without departing from the scope of the invention.
- Referring now to the FIGURE, a
communications system 10 has acellular pattern 12 that is illustrated as a plurality of hexagons on the earth's surface. The hexagons represent cells 14. Each cell 14 represents a geographic area that can receive a signal with a predetermined signal strength from abase unit 16 of acellular tower 18. Eachbase unit 16 has a transmitting and receivingantenna 20 positioned thereon for transmitting and receiving signals from aplatform 22. Although each cell 14 is illustrated as a hexagon, the edges of the cells are not physical boundaries and may vary depending on the positions and strength of the signals fromcellular tower 18. -
Platform 22 communicates with eachbase unit 16, aplatform operations center 24, and agateway station 26. Each communication link betweenplatform 22 andbase unit 16,platform 22 andgateway station 26,platform 22 andplatform operations center 24, anduser terminals 28 andbase unit 16 is described below. - A plurality of
microcells 30 may also be established within various locations of thecellular pattern 12. As illustrated,building 32 may contain amicrocell 30 therein. Microcell 30 may have amicrocell base unit 34 that has anantenna 36 for communicating withplatform 22. Themicrocell base unit 34 may also have an antenna that is used to transmit and receive wireless information from withinbuilding 32. A plurality ofmicrocells 30 may be established in various locations throughout thecellular pattern 12 and more particularly within various buildings within thecellular pattern 12. Microcell 30 acts as an additional sub-cell within a cell. -
Platform 22 is preferably a stratosphere-based platform that remains substantially stationary relative to a geographic region on the earth. Theplatform 22 is controlled byplatform operations center 24 to fly in a small radius flight path over a given spot on the earth. Various numbers of platforms may be used to cover a predetermined geographic region. Eachplatform 22 is used as a communications node betweengateway station 26 andbase units base units respective antennas platform 22. Gatewaystation 26 has anantenna 38 pointed towardplatform 22. Preferably, the beam width of the antennas is wide enough to maintain communications link withplatform 22 throughout theflight path 22.Gateway 26 is coupled to variousterrestrial networks 40 such as a public service telephone network or various Internet providers.User terminals 28 have access toterrestrial networks 40 throughbase units platform 22. -
Platform operations center 24 acts as a control station forplatform 22 and other platforms throughoutsystem 10.Platform operations center 24 provides control functions, such as attitude control, attitude management and replacement of parts and/orplatforms 22 throughoutsystem 10.Platform operations center 24 determines when and if aspecific platform 22 needs repair, replacement, or maintenance functions performed by monitoring the status of one ormore platforms 22 insystem 10. - The antennas used by
platform 22,base units gateway 26 allow for large data throughput in the present invention. Since there is shorter physical distance between theuser terminals 28 and theterrestrial networks 40 than in satellite-based systems, larger amounts of data at a larger data rate may be provided. - The communications payload on
platform 22 may, for example, be a simple transponder design connecting thebase units gateway station 26. Various types of encoding schemes may be incorporated such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), or combinations of these schemes to overcome interference caused by the worst case platform motions. Various frequencies may be used depending on the system requirements for communication between user terminals andbase unit base unit 16 andplatform 22, and, betweenplatform 22 andgateway station 26. Thebase units 34 ofmicrocells 30 preferably transmit at a frequency that does not interfere or otherwise block signals from within the cell 14 that it transmits. Also,microcell base unit 34 may transmit at a lower power thanbase unit 16 of cells 14. This allows the signals of themicrocell base units 34 to be directed into a narrow region such as a building. - In operation, signals from
user terminals 28 are transmitted tobase unit 16. Thebase unit 16 transmits the signal toplatform 22.Platform 22 transmits the signal togateway station 26.Gateway 26 receives the signal and determines whether the signal is an in-network signal or whether the signal is outside of the network. If the signal is within the network, the gateway station transmits the signal back to theplatform 22. Theplatform 22 routes the signal to theappropriate base unit 16 which in turn transmits a signal to the appropriate user terminal to which the call should be routed. If the signal is an out-of-network signal, thegateway station 26 routes the signal to theterrestrial networks 40. - The
microcells 30 work in a similar manner to that with respect to cells 14. That is, the user terminals within the microcells such as building 32 transmit signals to amicrocell base unit 34. Themicrocell base unit 34 transmits the signal to theplatform 22. The rest of the operation is the same as that described above. - The present invention advantageously allows the wireless services to be expanded rapidly without having to provide fixed connection between the
base unit gateway station 26. This link is often referred to as a “back haul.” Also, the total system capacity is scalable by increasing the number of platforms associated with the system. Thus, large geographic areas may be covered with several platforms and several gateway stations. - While particular embodiments of the invention have been shown and described, numerous variations alternate embodiments will occur to those skilled in the art. Accordingly, it is intended that the invention be limited only in terms of the appended claims.
Claims (14)
1. A communications system comprising:
a plurality of cells having a base unit therein, each base unit directly communicating with a plurality of users wirelessly;
a communications platform located in a stratospheric location for directly transmitting information signals to and directly receiving information signals from said base unit wirelessly; and
a gateway station directly communicating with the communications platform for wirelessly coupling of the user terminal with a terrestrial-based network through the communications platform and the base unit.
2. A communications system as recited in claim 1 wherein said users are mobile users.
3. A communications system as recited in claim 1 further comprising a microcell within one of the plurality of cells.
4. A communications system as recited in claim 3 wherein the microcell is formed within a building.
5-6. (Cancelled)
7. A communications system as recited in claim 1 wherein the communications platform is substantially stationary in the stratospheric location.
8. A communications system as recited in claim 1 wherein said system comprises a plurality of communications platforms.
9. A method of operating a communications system comprises the steps of:
wirelessly sending a first signal from a user terminal directly to a base unit;
wirelessly sending the first signal from the base unit directly to a stratosphere-based platform; and
transmitting the first signal directly from the stratosphere-based platform to a gateway station.
10. A method as recited in claim 9 further comprising the step of transmitting the first signal from the gateway station to a terrestrial-based network.
11. A method as recited in claim 9 further comprising the step of transmitting the first signal from the gateway station to the stratosphere-based platform.
12. A method as recited in claim 9 wherein the step of sending a first signal comprises the step of sending a first signal from the user terminal to a microcell base unit.
13-19. (Cancelled)
20. A communications system comprising:
a plurality of cells;
a plurality of base units, each of said plurality of base units directly communicating with a plurality of user terminals wirelessly;
a communications platform located in a stratospheric location for directly transmitting information signals wirelessly to and directly receiving information signals wirelessly from said plurality of base units; and
a gateway station directly communicating with the communications platform for wirelessly coupling a first user terminal of said plurality of user terminals with a terrestrial-based network or a second user terminal of said plurality of user terminals through the communications platform and a respective base unit of said plurality of base units.
21. A communications system as recited in claim 20 wherein said plurality of base units is less than said plurality of cells.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/931,861 US20050032545A1 (en) | 2000-07-14 | 2004-09-01 | Fixed wireless back haul for mobile communications using stratospheric platforms |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/615,894 US6829479B1 (en) | 2000-07-14 | 2000-07-14 | Fixed wireless back haul for mobile communications using stratospheric platforms |
US10/931,861 US20050032545A1 (en) | 2000-07-14 | 2004-09-01 | Fixed wireless back haul for mobile communications using stratospheric platforms |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/615,894 Continuation US6829479B1 (en) | 2000-07-14 | 2000-07-14 | Fixed wireless back haul for mobile communications using stratospheric platforms |
Publications (1)
Publication Number | Publication Date |
---|---|
US20050032545A1 true US20050032545A1 (en) | 2005-02-10 |
Family
ID=33452670
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/615,894 Expired - Lifetime US6829479B1 (en) | 2000-07-14 | 2000-07-14 | Fixed wireless back haul for mobile communications using stratospheric platforms |
US10/882,558 Abandoned US20040242153A1 (en) | 2000-07-14 | 2004-06-30 | Fixed wireless back haul for mobile communications using stratospheric platforms |
US10/931,861 Abandoned US20050032545A1 (en) | 2000-07-14 | 2004-09-01 | Fixed wireless back haul for mobile communications using stratospheric platforms |
Family Applications Before (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/615,894 Expired - Lifetime US6829479B1 (en) | 2000-07-14 | 2000-07-14 | Fixed wireless back haul for mobile communications using stratospheric platforms |
US10/882,558 Abandoned US20040242153A1 (en) | 2000-07-14 | 2004-06-30 | Fixed wireless back haul for mobile communications using stratospheric platforms |
Country Status (1)
Country | Link |
---|---|
US (3) | US6829479B1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6829479B1 (en) * | 2000-07-14 | 2004-12-07 | The Directv Group. Inc. | Fixed wireless back haul for mobile communications using stratospheric platforms |
US8494531B2 (en) * | 2005-03-25 | 2013-07-23 | Qualcomm Incorporated | System and method for creating a wireless picocell |
GB0614543D0 (en) * | 2006-07-21 | 2006-08-30 | Vodafone Plc | RF Distribution |
JP2014522601A (en) * | 2011-06-01 | 2014-09-04 | 株式会社Nttドコモ | Extended local access in mobile communications |
EP2756623B1 (en) | 2011-09-12 | 2018-04-04 | Ntt Docomo, Inc. | Enhanced local access in mobile communications with fdd resource allocation |
US9226206B2 (en) | 2011-09-12 | 2015-12-29 | Ntt Docomo, Inc. | Method and apparatus at the physical and link layer for mobile communications |
Citations (91)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4635063A (en) * | 1983-05-06 | 1987-01-06 | Hughes Aircraft Company | Adaptive antenna |
US4759051A (en) * | 1987-03-16 | 1988-07-19 | A. A. Hopeman, III | Communications system |
US4797677A (en) * | 1982-10-29 | 1989-01-10 | Istac, Incorporated | Method and apparatus for deriving pseudo range from earth-orbiting satellites |
US4897661A (en) * | 1987-04-10 | 1990-01-30 | Sony Corporation | Method and apparatus for determining the position of a vehicle |
US5017927A (en) * | 1990-02-20 | 1991-05-21 | General Electric Company | Monopulse phased array antenna with plural transmit-receive module phase shifters |
US5077562A (en) * | 1990-12-24 | 1991-12-31 | Hughes Aircraft Company | Digital beam-forming technique using temporary noise injection |
US5109390A (en) * | 1989-11-07 | 1992-04-28 | Qualcomm Incorporated | Diversity receiver in a cdma cellular telephone system |
US5218619A (en) * | 1990-12-17 | 1993-06-08 | Ericsson Ge Mobile Communications Holding, Inc. | CDMA subtractive demodulation |
US5339330A (en) * | 1990-03-19 | 1994-08-16 | David D. Otten | Integrated cellular communications system |
US5494766A (en) * | 1993-12-24 | 1996-02-27 | Shindengen Electric Manufacturing Co., Ltd. | Electrophotographic photoreceptor |
US5550809A (en) * | 1992-04-10 | 1996-08-27 | Ericsson Ge Mobile Communications, Inc. | Multiple access coding using bent sequences for mobile radio communications |
US5555257A (en) * | 1994-01-11 | 1996-09-10 | Ericsson Ge Mobile Communications Inc. | Cellular/satellite communications system with improved frequency re-use |
US5555444A (en) * | 1994-03-11 | 1996-09-10 | Motorola, Inc. | Method and apparatus for predictive operation of a communication system |
US5572216A (en) * | 1993-11-19 | 1996-11-05 | Stanford Telecommunications, Inc. | System for increasing the utility of satellite communication systems |
US5584047A (en) * | 1995-05-25 | 1996-12-10 | Tuck; Edward F. | Methods and apparatus for augmenting satellite broadcast system |
US5589834A (en) * | 1994-04-22 | 1996-12-31 | Stanford Telecommunications, Inc. | Cost effective geosynchronous mobile satellite communication system |
US5608722A (en) * | 1995-04-03 | 1997-03-04 | Qualcomm Incorporated | Multi-user communication system architecture with distributed receivers |
US5612701A (en) * | 1995-09-18 | 1997-03-18 | Motorola, Inc. | Adaptive beam pointing method and apparatus for a communication system |
US5715516A (en) * | 1995-10-18 | 1998-02-03 | Cellular Telecom, Ltd. | Method and apparatus for wireless communication employing collector arrays |
US5717737A (en) * | 1995-06-01 | 1998-02-10 | Padcom, Inc. | Apparatus and method for transparent wireless communication between a remote device and a host system |
US5790070A (en) * | 1997-05-05 | 1998-08-04 | Motorola, Inc. | Network and method for controlling steerable beams |
US5810284A (en) * | 1995-03-15 | 1998-09-22 | Hibbs; Bart D. | Aircraft |
US5825325A (en) * | 1995-12-21 | 1998-10-20 | Com Dev Limited | Intersatellite communications systems |
US5852721A (en) * | 1994-06-08 | 1998-12-22 | Hughes Electronics Corporation | Method and apparatus for selectively retrieving information from a source computer using a terrestrial or satellite interface |
US5856804A (en) * | 1996-10-30 | 1999-01-05 | Motorola, Inc. | Method and intelligent digital beam forming system with improved signal quality communications |
US5862480A (en) * | 1995-12-26 | 1999-01-19 | Motorola, Inc. | Method and apparatus for managing service accessibility between differing radio telecommunication networks |
US5864579A (en) * | 1996-07-25 | 1999-01-26 | Cd Radio Inc. | Digital radio satellite and terrestrial ubiquitous broadcasting system using spread spectrum modulation |
US5867109A (en) * | 1995-06-06 | 1999-02-02 | Globalstar L.P. | Satellite repeater diversity resource management system |
US5878034A (en) * | 1996-05-29 | 1999-03-02 | Lockheed Martin Corporation | Spacecraft TDMA communications system with synchronization by spread spectrum overlay channel |
US5903459A (en) * | 1996-06-06 | 1999-05-11 | The Boeing Company | Method for product acceptance by improving the accuracy of machines |
US5909460A (en) * | 1995-12-07 | 1999-06-01 | Ericsson, Inc. | Efficient apparatus for simultaneous modulation and digital beamforming for an antenna array |
US5915207A (en) * | 1996-01-22 | 1999-06-22 | Hughes Electronics Corporation | Mobile and wireless information dissemination architecture and protocols |
US5917447A (en) * | 1996-05-29 | 1999-06-29 | Motorola, Inc. | Method and system for digital beam forming |
US5918147A (en) * | 1995-03-29 | 1999-06-29 | Motorola, Inc. | Process for forming a semiconductor device with an antireflective layer |
US5937332A (en) * | 1997-03-21 | 1999-08-10 | Ericsson, Inc. | Satellite telecommunications repeaters and retransmission methods |
US5946625A (en) * | 1996-10-10 | 1999-08-31 | Ericsson, Inc. | Method for improving co-channel interference in a cellular system |
US5963862A (en) * | 1996-10-25 | 1999-10-05 | Pt Pasifik Satelit Nusantara | Integrated telecommunications system providing fixed and mobile satellite-based services |
US5973647A (en) * | 1997-09-17 | 1999-10-26 | Aerosat Corporation | Low-height, low-cost, high-gain antenna and system for mobile platforms |
US5974317A (en) * | 1996-11-08 | 1999-10-26 | Lucent Technologies, Inc. | Cell-clustering arrangements and corresponding antenna patterns for wireless communication networks employing high-altitude aeronautical antenna platforms |
US5982337A (en) * | 1998-02-20 | 1999-11-09 | Marconi Aerospace Systems Inc. | Cellular antennas for stratosphere coverage of multi-band annular earth pattern |
US6020845A (en) * | 1993-11-19 | 2000-02-01 | Stanford Telecommunications, Inc. | Satellite for increasing the utility of satellite communication systems |
US6028884A (en) * | 1997-10-14 | 2000-02-22 | Qualcomm Incorporated | Method and apparatus for measuring nonlinear effects in a communication system |
US6032041A (en) * | 1997-06-02 | 2000-02-29 | Hughes Electronics Corporation | Method and system for providing wideband communications to mobile users in a satellite-based network |
US6061562A (en) * | 1997-10-30 | 2000-05-09 | Raytheon Company | Wireless communication using an airborne switching node |
US6067453A (en) * | 1996-10-25 | 2000-05-23 | Pt Pasifik Satelit Nusantara | Satellite-based direct access telecommunications systems |
US6067442A (en) * | 1991-10-10 | 2000-05-23 | Globalstar L.P. | Satellite communications system having distributed user assignment and resource assignment with terrestrial gateways |
US6104911A (en) * | 1997-11-14 | 2000-08-15 | Motorola, Inc. | Communication system with satellite diversity and method of operation thereof |
US6111542A (en) * | 1998-04-06 | 2000-08-29 | Motorola, Inc. | Rotating electronically steerable antenna system and method of operation thereof |
US6147658A (en) * | 1998-07-06 | 2000-11-14 | Murata Manufacturing Co., Ltd. | Array antenna device and radio equipment |
US6151308A (en) * | 1996-12-30 | 2000-11-21 | Motorola, Inc. | Elevated communication hub and method of operation therefor |
US6157621A (en) * | 1991-10-28 | 2000-12-05 | Teledesic Llc | Satellite communication system |
US6160994A (en) * | 1996-12-19 | 2000-12-12 | Globalstar L.P. | Interactive fixed and mobile satellite network |
US6167263A (en) * | 1997-05-16 | 2000-12-26 | Spherecore, Inc. | Aerial communications network including a plurality of aerial platforms |
US6176451B1 (en) * | 1998-09-21 | 2001-01-23 | Lockheed Martin Corporation | Utilizing high altitude long endurance unmanned airborne vehicle technology for airborne space lift range support |
US6195555B1 (en) * | 1994-01-11 | 2001-02-27 | Ericsson Inc. | Method of directing a call to a mobile telephone in a dual mode cellular satellite communication network |
US6201797B1 (en) * | 1997-12-12 | 2001-03-13 | At&T Wireless Services Inc. | High bandwidth delivery and internet access for airborne passengers |
US6205320B1 (en) * | 1998-09-04 | 2001-03-20 | Richard Coleman | System for satellite to airship to gateway/customer premise equipment, and airship to airship, high data rate relay |
US6215776B1 (en) * | 1997-10-08 | 2001-04-10 | Lockheed Martin Missiles & Space Company | Satellite communication system |
US6223031B1 (en) * | 1996-07-05 | 2001-04-24 | Telefonaktiebolaget Lm Ericsson (Publ) | Process and device for quality determination |
US6253080B1 (en) * | 1999-07-08 | 2001-06-26 | Globalstar L.P. | Low earth orbit distributed gateway communication system |
US6298238B1 (en) * | 1998-09-09 | 2001-10-02 | Qualcomm Incorporated | Fast user terminal position determination in a satellite communications system |
US6308045B1 (en) * | 1995-11-14 | 2001-10-23 | Harris Corporation | Wireless ground link-based aircraft data communication system with roaming feature |
US20010038342A1 (en) * | 2000-05-05 | 2001-11-08 | Foote Charles A. | Method and system for airborne meter communication |
US6324398B1 (en) * | 1996-02-26 | 2001-11-27 | Lucent Technologies Inc. | Wireless telecommunications system having airborne base station |
US6324405B1 (en) * | 1996-09-09 | 2001-11-27 | Ico Services Ltd. | Communications apparatus and method for mobile platforms having a plurality of users |
US6339611B1 (en) * | 1998-11-09 | 2002-01-15 | Qualcomm Inc. | Method and apparatus for cross polarized isolation in a communication system |
US6343205B1 (en) * | 1995-11-30 | 2002-01-29 | Motient Services Inc. | Network operations center for mobile earth terminal satellite communications system |
US20020041575A1 (en) * | 2000-08-02 | 2002-04-11 | Mobile Satellite Ventures Llc | Coordinated satellite-terrestrial frequency reuse |
US6374080B2 (en) * | 1999-06-17 | 2002-04-16 | Mitsubishi Denki Kabushiki Kaisha | Mobile communication system |
US6377802B1 (en) * | 1992-03-06 | 2002-04-23 | Aircell, Inc. | Doppler insensitive non-terrestrial digital cellular communications network |
US6380893B1 (en) * | 2000-09-05 | 2002-04-30 | Hughes Electronics Corporation | Ground-based, wavefront-projection beamformer for a stratospheric communications platform |
US6385434B1 (en) * | 1998-09-16 | 2002-05-07 | Motorola, Inc. | Wireless access unit utilizing adaptive spectrum exploitation |
US6388615B1 (en) * | 2000-06-06 | 2002-05-14 | Hughes Electronics Corporation | Micro cell architecture for mobile user tracking communication system |
US20020072361A1 (en) * | 1999-06-29 | 2002-06-13 | Gerald M. Knoblach | Airborne constellation of communications platforms and method |
US6408180B1 (en) * | 1992-03-06 | 2002-06-18 | Aircell, Inc. | Ubiquitous mobile subscriber station |
US6422516B1 (en) * | 1997-05-21 | 2002-07-23 | Hitachi, Ltd. | Artificial satellite with an orbit having a long staying time in a zenith direction, an orbit control method and a communication system therewith |
US6438379B1 (en) * | 1999-05-28 | 2002-08-20 | Lucent Technologies, Inc. | Power control and cell site location technique for CDMA systems with hierarchical architecture |
US6452541B1 (en) * | 2001-02-20 | 2002-09-17 | Motorola, Inc. | Time synchronization of a satellite positioning system enabled mobile receiver and base station |
US6466554B2 (en) * | 1996-09-11 | 2002-10-15 | Fujitsu Limited | Satellite data distribution method and system using a mobile communication system |
US6480788B2 (en) * | 1999-07-12 | 2002-11-12 | Eagle-Eye, Inc. | System and method for fast acquisition reporting using communication satellite range measurement |
US6507739B1 (en) * | 2000-06-26 | 2003-01-14 | Motorola, Inc. | Apparatus and methods for controlling a cellular communications network having airborne transceivers |
US6526288B1 (en) * | 1998-04-28 | 2003-02-25 | Koninklijke Philips Electronics, N.V. | System for connecting a data communication device over wireless terminals to a communication network |
US6529706B1 (en) * | 1999-09-13 | 2003-03-04 | Rockwell Collins, Inc. | Aircraft satellite communications system for distributing internet service from direct broadcast satellites |
US6567052B1 (en) * | 2000-11-21 | 2003-05-20 | Hughes Electronics Corporation | Stratospheric platform system architecture with adjustment of antenna boresight angles |
US6570858B1 (en) * | 1999-11-01 | 2003-05-27 | Motorola, Inc. | Satellite-based communications system with terrestrial repeater and method therefor |
US6591111B1 (en) * | 1999-12-10 | 2003-07-08 | Motorola, Inc. | Group radio communication system and method using interconnected radio sub-networks |
US6781968B1 (en) * | 1997-09-08 | 2004-08-24 | Marc Arnold | Wireless communication system, apparatus and method using an atmospheric platform having a wideband trunkline |
US6829479B1 (en) * | 2000-07-14 | 2004-12-07 | The Directv Group. Inc. | Fixed wireless back haul for mobile communications using stratospheric platforms |
US20050080557A1 (en) * | 2003-09-10 | 2005-04-14 | Nokia Corporation | Method and a system in positioning, and a device |
US6944450B2 (en) * | 2000-04-10 | 2005-09-13 | Aerovironment, Inc. | Communications system |
US7027769B1 (en) * | 2000-03-31 | 2006-04-11 | The Directv Group, Inc. | GEO stationary communications system with minimal delay |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
PT711476E (en) | 1993-07-30 | 2000-04-28 | Int Multi Media Corp | SYSTEM AND PROCESS OF TELECOMMUNICATIONS AND STATION LONG-DURATION RELAY ON A SUB-ORBITAL PLAN |
US5691974A (en) | 1995-01-04 | 1997-11-25 | Qualcomm Incorporated | Method and apparatus for using full spectrum transmitted power in a spread spectrum communication system for tracking individual recipient phase, time and energy |
AU6709396A (en) | 1995-08-11 | 1997-03-12 | Ramot University Authority For Applied Research And Industrial Development Ltd. | High altitude cellular communication system platform |
US5918157A (en) | 1997-03-18 | 1999-06-29 | Globalstar L.P. | Satellite communications system having distributed user assignment and resource assignment with terrestrial gateways |
WO1999013598A1 (en) | 1997-09-08 | 1999-03-18 | Angel Technologies Corporation | Wireless communication using atmospheric platform |
AU5805299A (en) | 1998-09-08 | 2000-03-27 | Angel Technologies Corporation | Network for providing wireless communications using an atmospheric platform |
US6963548B1 (en) | 2000-04-17 | 2005-11-08 | The Directv Group, Inc. | Coherent synchronization of code division multiple access signals |
EP1152552A3 (en) | 2000-05-05 | 2004-05-06 | Hughes Electronics Corporation | System and method for two-way communications using a high altitude communication device |
EP1158698B1 (en) | 2000-05-22 | 2007-04-11 | Hughes Electronics Corporation | A multi-platform wireless communication system for a variety of different user types |
DE60126733T2 (en) | 2000-05-30 | 2007-11-15 | Hughes Electronics Corp., El Segundo | WIRELESS COMMUNICATION SYSTEM WITH MULTIPLE NODES THAT HAS MULTIPLE TRANSMITTER PLATFORMS |
US6756937B1 (en) | 2000-06-06 | 2004-06-29 | The Directv Group, Inc. | Stratospheric platforms based mobile communications architecture |
-
2000
- 2000-07-14 US US09/615,894 patent/US6829479B1/en not_active Expired - Lifetime
-
2004
- 2004-06-30 US US10/882,558 patent/US20040242153A1/en not_active Abandoned
- 2004-09-01 US US10/931,861 patent/US20050032545A1/en not_active Abandoned
Patent Citations (96)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4797677A (en) * | 1982-10-29 | 1989-01-10 | Istac, Incorporated | Method and apparatus for deriving pseudo range from earth-orbiting satellites |
US4635063A (en) * | 1983-05-06 | 1987-01-06 | Hughes Aircraft Company | Adaptive antenna |
US4759051A (en) * | 1987-03-16 | 1988-07-19 | A. A. Hopeman, III | Communications system |
US4897661A (en) * | 1987-04-10 | 1990-01-30 | Sony Corporation | Method and apparatus for determining the position of a vehicle |
US5109390A (en) * | 1989-11-07 | 1992-04-28 | Qualcomm Incorporated | Diversity receiver in a cdma cellular telephone system |
US5017927A (en) * | 1990-02-20 | 1991-05-21 | General Electric Company | Monopulse phased array antenna with plural transmit-receive module phase shifters |
US5339330A (en) * | 1990-03-19 | 1994-08-16 | David D. Otten | Integrated cellular communications system |
US5218619A (en) * | 1990-12-17 | 1993-06-08 | Ericsson Ge Mobile Communications Holding, Inc. | CDMA subtractive demodulation |
US5077562A (en) * | 1990-12-24 | 1991-12-31 | Hughes Aircraft Company | Digital beam-forming technique using temporary noise injection |
US6067442A (en) * | 1991-10-10 | 2000-05-23 | Globalstar L.P. | Satellite communications system having distributed user assignment and resource assignment with terrestrial gateways |
US6157621A (en) * | 1991-10-28 | 2000-12-05 | Teledesic Llc | Satellite communication system |
US6408180B1 (en) * | 1992-03-06 | 2002-06-18 | Aircell, Inc. | Ubiquitous mobile subscriber station |
US6377802B1 (en) * | 1992-03-06 | 2002-04-23 | Aircell, Inc. | Doppler insensitive non-terrestrial digital cellular communications network |
US5550809A (en) * | 1992-04-10 | 1996-08-27 | Ericsson Ge Mobile Communications, Inc. | Multiple access coding using bent sequences for mobile radio communications |
US5572216A (en) * | 1993-11-19 | 1996-11-05 | Stanford Telecommunications, Inc. | System for increasing the utility of satellite communication systems |
US6020845A (en) * | 1993-11-19 | 2000-02-01 | Stanford Telecommunications, Inc. | Satellite for increasing the utility of satellite communication systems |
US5494766A (en) * | 1993-12-24 | 1996-02-27 | Shindengen Electric Manufacturing Co., Ltd. | Electrophotographic photoreceptor |
US5594941A (en) * | 1994-01-11 | 1997-01-14 | Ericsson Inc. | A cellular/satellite communications system with generation of a plurality of sets of intersecting antenna beams |
US6195555B1 (en) * | 1994-01-11 | 2001-02-27 | Ericsson Inc. | Method of directing a call to a mobile telephone in a dual mode cellular satellite communication network |
US5555257A (en) * | 1994-01-11 | 1996-09-10 | Ericsson Ge Mobile Communications Inc. | Cellular/satellite communications system with improved frequency re-use |
US5555444A (en) * | 1994-03-11 | 1996-09-10 | Motorola, Inc. | Method and apparatus for predictive operation of a communication system |
US5589834A (en) * | 1994-04-22 | 1996-12-31 | Stanford Telecommunications, Inc. | Cost effective geosynchronous mobile satellite communication system |
US5852721A (en) * | 1994-06-08 | 1998-12-22 | Hughes Electronics Corporation | Method and apparatus for selectively retrieving information from a source computer using a terrestrial or satellite interface |
US6016388A (en) * | 1994-06-08 | 2000-01-18 | Hughes Electronics Corporation | Method and apparatus for requesting and retrieving information from a source computer using terrestrial and satellite interfaces |
US5995726A (en) * | 1994-06-08 | 1999-11-30 | Hughes Electronics Corporation | Method and apparatus for requesting and retrieving information from a source computer using terrestrial and satellite interfaces |
US5995725A (en) * | 1994-06-08 | 1999-11-30 | Hughes Electronics Corporation | Method and apparatus for requesting and retrieving information from a source computer using terrestrial and satellite interfaces |
US5810284A (en) * | 1995-03-15 | 1998-09-22 | Hibbs; Bart D. | Aircraft |
US5918147A (en) * | 1995-03-29 | 1999-06-29 | Motorola, Inc. | Process for forming a semiconductor device with an antireflective layer |
US5608722A (en) * | 1995-04-03 | 1997-03-04 | Qualcomm Incorporated | Multi-user communication system architecture with distributed receivers |
US5584047A (en) * | 1995-05-25 | 1996-12-10 | Tuck; Edward F. | Methods and apparatus for augmenting satellite broadcast system |
US5717737A (en) * | 1995-06-01 | 1998-02-10 | Padcom, Inc. | Apparatus and method for transparent wireless communication between a remote device and a host system |
US5867109A (en) * | 1995-06-06 | 1999-02-02 | Globalstar L.P. | Satellite repeater diversity resource management system |
US5612701A (en) * | 1995-09-18 | 1997-03-18 | Motorola, Inc. | Adaptive beam pointing method and apparatus for a communication system |
US5715516A (en) * | 1995-10-18 | 1998-02-03 | Cellular Telecom, Ltd. | Method and apparatus for wireless communication employing collector arrays |
US6308045B1 (en) * | 1995-11-14 | 2001-10-23 | Harris Corporation | Wireless ground link-based aircraft data communication system with roaming feature |
US6343205B1 (en) * | 1995-11-30 | 2002-01-29 | Motient Services Inc. | Network operations center for mobile earth terminal satellite communications system |
US5909460A (en) * | 1995-12-07 | 1999-06-01 | Ericsson, Inc. | Efficient apparatus for simultaneous modulation and digital beamforming for an antenna array |
US5825325A (en) * | 1995-12-21 | 1998-10-20 | Com Dev Limited | Intersatellite communications systems |
US5862480A (en) * | 1995-12-26 | 1999-01-19 | Motorola, Inc. | Method and apparatus for managing service accessibility between differing radio telecommunication networks |
US5915207A (en) * | 1996-01-22 | 1999-06-22 | Hughes Electronics Corporation | Mobile and wireless information dissemination architecture and protocols |
US6324398B1 (en) * | 1996-02-26 | 2001-11-27 | Lucent Technologies Inc. | Wireless telecommunications system having airborne base station |
US5878034A (en) * | 1996-05-29 | 1999-03-02 | Lockheed Martin Corporation | Spacecraft TDMA communications system with synchronization by spread spectrum overlay channel |
US5917447A (en) * | 1996-05-29 | 1999-06-29 | Motorola, Inc. | Method and system for digital beam forming |
US5903459A (en) * | 1996-06-06 | 1999-05-11 | The Boeing Company | Method for product acceptance by improving the accuracy of machines |
US6223031B1 (en) * | 1996-07-05 | 2001-04-24 | Telefonaktiebolaget Lm Ericsson (Publ) | Process and device for quality determination |
US5864579A (en) * | 1996-07-25 | 1999-01-26 | Cd Radio Inc. | Digital radio satellite and terrestrial ubiquitous broadcasting system using spread spectrum modulation |
US6324405B1 (en) * | 1996-09-09 | 2001-11-27 | Ico Services Ltd. | Communications apparatus and method for mobile platforms having a plurality of users |
US6466554B2 (en) * | 1996-09-11 | 2002-10-15 | Fujitsu Limited | Satellite data distribution method and system using a mobile communication system |
US5946625A (en) * | 1996-10-10 | 1999-08-31 | Ericsson, Inc. | Method for improving co-channel interference in a cellular system |
US6067453A (en) * | 1996-10-25 | 2000-05-23 | Pt Pasifik Satelit Nusantara | Satellite-based direct access telecommunications systems |
US5963862A (en) * | 1996-10-25 | 1999-10-05 | Pt Pasifik Satelit Nusantara | Integrated telecommunications system providing fixed and mobile satellite-based services |
US5856804A (en) * | 1996-10-30 | 1999-01-05 | Motorola, Inc. | Method and intelligent digital beam forming system with improved signal quality communications |
US5974317A (en) * | 1996-11-08 | 1999-10-26 | Lucent Technologies, Inc. | Cell-clustering arrangements and corresponding antenna patterns for wireless communication networks employing high-altitude aeronautical antenna platforms |
US6160994A (en) * | 1996-12-19 | 2000-12-12 | Globalstar L.P. | Interactive fixed and mobile satellite network |
US6151308A (en) * | 1996-12-30 | 2000-11-21 | Motorola, Inc. | Elevated communication hub and method of operation therefor |
US5937332A (en) * | 1997-03-21 | 1999-08-10 | Ericsson, Inc. | Satellite telecommunications repeaters and retransmission methods |
US5790070A (en) * | 1997-05-05 | 1998-08-04 | Motorola, Inc. | Network and method for controlling steerable beams |
US6167263A (en) * | 1997-05-16 | 2000-12-26 | Spherecore, Inc. | Aerial communications network including a plurality of aerial platforms |
US6422516B1 (en) * | 1997-05-21 | 2002-07-23 | Hitachi, Ltd. | Artificial satellite with an orbit having a long staying time in a zenith direction, an orbit control method and a communication system therewith |
US6032041A (en) * | 1997-06-02 | 2000-02-29 | Hughes Electronics Corporation | Method and system for providing wideband communications to mobile users in a satellite-based network |
US6781968B1 (en) * | 1997-09-08 | 2004-08-24 | Marc Arnold | Wireless communication system, apparatus and method using an atmospheric platform having a wideband trunkline |
US5973647A (en) * | 1997-09-17 | 1999-10-26 | Aerosat Corporation | Low-height, low-cost, high-gain antenna and system for mobile platforms |
US6215776B1 (en) * | 1997-10-08 | 2001-04-10 | Lockheed Martin Missiles & Space Company | Satellite communication system |
US6028884A (en) * | 1997-10-14 | 2000-02-22 | Qualcomm Incorporated | Method and apparatus for measuring nonlinear effects in a communication system |
US6061562A (en) * | 1997-10-30 | 2000-05-09 | Raytheon Company | Wireless communication using an airborne switching node |
US6104911A (en) * | 1997-11-14 | 2000-08-15 | Motorola, Inc. | Communication system with satellite diversity and method of operation thereof |
US6201797B1 (en) * | 1997-12-12 | 2001-03-13 | At&T Wireless Services Inc. | High bandwidth delivery and internet access for airborne passengers |
US5982337A (en) * | 1998-02-20 | 1999-11-09 | Marconi Aerospace Systems Inc. | Cellular antennas for stratosphere coverage of multi-band annular earth pattern |
US6111542A (en) * | 1998-04-06 | 2000-08-29 | Motorola, Inc. | Rotating electronically steerable antenna system and method of operation thereof |
US6526288B1 (en) * | 1998-04-28 | 2003-02-25 | Koninklijke Philips Electronics, N.V. | System for connecting a data communication device over wireless terminals to a communication network |
US6147658A (en) * | 1998-07-06 | 2000-11-14 | Murata Manufacturing Co., Ltd. | Array antenna device and radio equipment |
US6205320B1 (en) * | 1998-09-04 | 2001-03-20 | Richard Coleman | System for satellite to airship to gateway/customer premise equipment, and airship to airship, high data rate relay |
US6298238B1 (en) * | 1998-09-09 | 2001-10-02 | Qualcomm Incorporated | Fast user terminal position determination in a satellite communications system |
US6385434B1 (en) * | 1998-09-16 | 2002-05-07 | Motorola, Inc. | Wireless access unit utilizing adaptive spectrum exploitation |
US6176451B1 (en) * | 1998-09-21 | 2001-01-23 | Lockheed Martin Corporation | Utilizing high altitude long endurance unmanned airborne vehicle technology for airborne space lift range support |
US6339611B1 (en) * | 1998-11-09 | 2002-01-15 | Qualcomm Inc. | Method and apparatus for cross polarized isolation in a communication system |
US6438379B1 (en) * | 1999-05-28 | 2002-08-20 | Lucent Technologies, Inc. | Power control and cell site location technique for CDMA systems with hierarchical architecture |
US6374080B2 (en) * | 1999-06-17 | 2002-04-16 | Mitsubishi Denki Kabushiki Kaisha | Mobile communication system |
US20020072361A1 (en) * | 1999-06-29 | 2002-06-13 | Gerald M. Knoblach | Airborne constellation of communications platforms and method |
US6253080B1 (en) * | 1999-07-08 | 2001-06-26 | Globalstar L.P. | Low earth orbit distributed gateway communication system |
US6480788B2 (en) * | 1999-07-12 | 2002-11-12 | Eagle-Eye, Inc. | System and method for fast acquisition reporting using communication satellite range measurement |
US6529706B1 (en) * | 1999-09-13 | 2003-03-04 | Rockwell Collins, Inc. | Aircraft satellite communications system for distributing internet service from direct broadcast satellites |
US6570858B1 (en) * | 1999-11-01 | 2003-05-27 | Motorola, Inc. | Satellite-based communications system with terrestrial repeater and method therefor |
US6591111B1 (en) * | 1999-12-10 | 2003-07-08 | Motorola, Inc. | Group radio communication system and method using interconnected radio sub-networks |
US7027769B1 (en) * | 2000-03-31 | 2006-04-11 | The Directv Group, Inc. | GEO stationary communications system with minimal delay |
US6944450B2 (en) * | 2000-04-10 | 2005-09-13 | Aerovironment, Inc. | Communications system |
US20010038342A1 (en) * | 2000-05-05 | 2001-11-08 | Foote Charles A. | Method and system for airborne meter communication |
US20020126042A1 (en) * | 2000-06-06 | 2002-09-12 | Hughes Electronics Corporation | Micro cell architecture for mobile user tracking communication system |
US6388615B1 (en) * | 2000-06-06 | 2002-05-14 | Hughes Electronics Corporation | Micro cell architecture for mobile user tracking communication system |
US6507739B1 (en) * | 2000-06-26 | 2003-01-14 | Motorola, Inc. | Apparatus and methods for controlling a cellular communications network having airborne transceivers |
US6829479B1 (en) * | 2000-07-14 | 2004-12-07 | The Directv Group. Inc. | Fixed wireless back haul for mobile communications using stratospheric platforms |
US20020041575A1 (en) * | 2000-08-02 | 2002-04-11 | Mobile Satellite Ventures Llc | Coordinated satellite-terrestrial frequency reuse |
US6380893B1 (en) * | 2000-09-05 | 2002-04-30 | Hughes Electronics Corporation | Ground-based, wavefront-projection beamformer for a stratospheric communications platform |
US6567052B1 (en) * | 2000-11-21 | 2003-05-20 | Hughes Electronics Corporation | Stratospheric platform system architecture with adjustment of antenna boresight angles |
US6452541B1 (en) * | 2001-02-20 | 2002-09-17 | Motorola, Inc. | Time synchronization of a satellite positioning system enabled mobile receiver and base station |
US20050080557A1 (en) * | 2003-09-10 | 2005-04-14 | Nokia Corporation | Method and a system in positioning, and a device |
Also Published As
Publication number | Publication date |
---|---|
US6829479B1 (en) | 2004-12-07 |
US20040242153A1 (en) | 2004-12-02 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6788935B1 (en) | Aircraft-based network for wireless subscriber stations | |
CA2346476C (en) | Mobile subscriber station for terrestrial and non-terrestrial communication | |
US6856803B1 (en) | Method for maintaining candidate handoff list for airborne cellular system | |
US5926758A (en) | Radio frequency sharing methods for satellite systems | |
EP1010262B1 (en) | Fixed and mobile satellite radiotelephone systems and methods with capacity sharing | |
CN107070532B (en) | System for providing high speed communication service in airborne wireless cellular network | |
EP0365885B1 (en) | Satellite cellular telephone and data communication system | |
US6804515B1 (en) | Transportable infrastructure for airborne cellular system | |
US7200360B1 (en) | Communication system as a secondary platform with frequency reuse | |
US7027769B1 (en) | GEO stationary communications system with minimal delay | |
KR19980080437A (en) | Satellite communication system and method of operation of the communication system | |
KR20010051380A (en) | Closed loop power control for low earth orbit satellite communications system | |
WO1996031017A1 (en) | Non-geostationary satellite mobile communication system integration with network principles for terrestrial cellular | |
US6725013B1 (en) | Communication system having frequency reuse in non-blocking manner | |
US5752162A (en) | Methods for assigning subscriber units to visited gateways | |
US6891813B2 (en) | Dynamic cell CDMA code assignment system and method | |
US20040192197A1 (en) | Geostationary satellite system with satellite clusters having intra-cluster local area networks and inter-cluster wide area network | |
US6829479B1 (en) | Fixed wireless back haul for mobile communications using stratospheric platforms | |
WO2003003614A1 (en) | Candidate handoff list for airborne cellular system | |
US6763242B1 (en) | Resource assignment system and method for determining the same | |
Grace et al. | Communications from high altitude platforms a complementary or disruptive technology? | |
Mazur | A description of current and planned location strategies within the ORBCOMM network | |
Ananasso et al. | Gateway Earth Stations for Future LEO Communications Satellite Systems | |
Richharia et al. | Non-Geostationary Orbit Satellite Systems | |
MXPA97009984A (en) | Control of closed circuit power for satellite communications system in the terrestrial orbit b |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: THE DIRECTV GROUP, INC., CALIFORNIA Free format text: CHANGE OF NAME;ASSIGNOR:HUGHES ELECTRONICS CORPORATION;REEL/FRAME:026244/0217 Effective date: 20040316 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- AFTER EXAMINER'S ANSWER OR BOARD OF APPEALS DECISION |