US20050032545A1 - Fixed wireless back haul for mobile communications using stratospheric platforms - Google Patents

Fixed wireless back haul for mobile communications using stratospheric platforms Download PDF

Info

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
Application number
US10/931,861
Inventor
Donald Chang
Ming Chang
Ying Feria
Harold Rosen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DirecTV Group Inc
Original Assignee
DirecTV Group Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by DirecTV Group Inc filed Critical DirecTV Group Inc
Priority to US10/931,861 priority Critical patent/US20050032545A1/en
Publication of US20050032545A1 publication Critical patent/US20050032545A1/en
Assigned to THE DIRECTV GROUP, INC. reassignment THE DIRECTV GROUP, INC. CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: HUGHES ELECTRONICS CORPORATION
Abandoned legal-status Critical Current

Links

Images

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/14Relay systems
    • H04B7/15Active relay systems
    • H04B7/185Space-based or airborne stations; Stations for satellite systems
    • H04B7/18502Airborne stations
    • H04B7/18504Aircraft 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

    RELATED APPLICATIONS
  • 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.
  • TECHNICAL FIELD
  • The present invention relates generally to wireless communications and, more particularly, to a wireless communications system that uses a high altitude communication device.
  • BACKGROUND ART
  • 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.
  • SUMMARY OF THE INVENTION
  • 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.
  • BRIEF DESCRIPTION OF THE DRAWING
  • FIG. 1 is a system diagrammatic view of the communication system according to the present invention.
  • BEST MODES FOR CARRYING OUT THE 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 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. 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 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. As illustrated, 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. Preferably, 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. 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. Also, 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.
  • In operation, 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.” 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.
US10/931,861 2000-07-14 2004-09-01 Fixed wireless back haul for mobile communications using stratospheric platforms Abandoned US20050032545A1 (en)

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)

* Cited by examiner, † Cited by third party
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
US20140198655A1 (en) * 2011-06-01 2014-07-17 Ntt Docomo, Inc. Enhanced local access in mobile communications using small node devices
US9544827B2 (en) 2011-09-12 2017-01-10 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)

* Cited by examiner, † Cited by third party
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
US5555444A (en) * 1994-03-11 1996-09-10 Motorola, Inc. Method and apparatus for predictive operation of a communication system
US5555257A (en) * 1994-01-11 1996-09-10 Ericsson Ge Mobile Communications Inc. Cellular/satellite communications system with improved frequency re-use
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
US6324405B1 (en) * 1996-09-09 2001-11-27 Ico Services Ltd. Communications apparatus and method for mobile platforms having a plurality of users
US6324398B1 (en) * 1996-02-26 2001-11-27 Lucent Technologies Inc. Wireless telecommunications system having airborne base station
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09503892A (en) 1993-07-30 1997-04-15 インターナショナル マルチメディア コーポレイション Under-orbit high altitude communication device
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
ES2283353T3 (en) 2000-05-22 2007-11-01 Hughes Electronics Corporation A SYSTEM OF WIRELESS COMMUNICATIONS OF MULTIPLE PLATFORMS FOR A VARIETY OF DIFFERENT TYPES OF USER.
EP1232579B1 (en) 2000-05-30 2007-02-21 Hughes Electronics Corporation Multi-node wireless communication system with multiple transponding platforms
US6756937B1 (en) 2000-06-06 2004-06-29 The Directv Group, Inc. Stratospheric platforms based mobile communications architecture

Patent Citations (96)

* Cited by examiner, † Cited by third party
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
US5555257A (en) * 1994-01-11 1996-09-10 Ericsson Ge Mobile Communications Inc. Cellular/satellite communications system with improved frequency re-use
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
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
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
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
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
US20040242153A1 (en) 2004-12-02
US6829479B1 (en) 2004-12-07

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
EP0818086A1 (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