Airborne broadband communication network

• US 6,018,659 A
• Filed: 04/24/1997
• Issued: 01/25/2000
• Est. Priority Date: 10/17/1996
• Status: Expired due to Term

• Current Assignee: The Boeing Co.
• Original Assignee: The Boeing Co.
• Inventors: Ray, Sankar, Harrang, Jeff P., Ayyagari, Arun
• Primary Examiner(s): Loomis, Paul
• Assistant Examiner(s): TIEU, BINH KIEN
• Application Number:
  US08/845,548
• Time in Patent Office: 1,006 Days
• Field of Search: 455/12.1, 455/13.2, 455/13.3, 455/427, 455/429, 455/430, 455/431, 455/11.1, 342/2, 342/352, 342/355, 342/357, 342/450, 342/454, 342/458, 342/463, 701/213, 701/214
• US Class Current: 455/431
• CPC Class Codes: H04B 7/18504 Aircraft used as relay or high altitude atmospheric platform
• CPC Class Codes: H04B 7/18508 with satellite system used as relay, i.e. aeronautical mobile satellite service

Abstract

A deployed group of airborne vehicles (AV) provide relay communication service among mobile and airborne customers by using a directed phased array antenna (PAA). The PAAs provide broadband communication with mobile customers. Each AV has a wireless link to one or more neighboring AVs forming an airborne inter-networked mesh constellation for routing traffic between mobile customers. The AV constellation includes gateway members that maintain high capacity point-to-point satellite or terrestrial base station links for communication connectivity outside the aggregate coverage area of the AV constellation. A constellation is managed by an operations control center whose duties include positioning and scheduling replacement of the constellation AVs and routine network management functions, to implement the rapidly deployable, broadband, mobile, wireless communication network.

Claims

1. A communication system for wireless broadband communication, comprising:

a plurality of ground based users; and

an airborne vehicle for exchanging communication data with at least one user of said plurality of users within a predefined coverage area, said airborne vehicle comprising;

an altitude determining mechanism for generating attitude reference information;

a position determining means for generating airborne vehicle position information and position information of users within the airborne vehicle'"'"'s coverage area;

a central processing unit for generating targeting signals according to said generated attitude reference information and position information;

an assigning means for assigning at least one transmit and at least one receive data channel of a predefined transmission scheme to each user, wherein data channel transmission and reception occur at different time intervals according to a predefined timing protocol;

a receive directed beam antenna for receiving data according to said assigned at least one receive data channel and said generated targeting signals;

a switching means for determining the destination user of said received data; and

a transmit directed beam antenna for transmitting said received data to said determined destination user according to said assigned at least one transmit data channel and said generated targeting signals.

2. The system of claim 1, wherein each of said plurality of users comprises:

an attitude determining mechanism for generating attitude reference information;

a position determining means for generating position information;

a central processing unit for generating targeting signals according to said generated inertial reference information and position information; and

transmit and receive antennas for receiving and transmitting data according to said generated targeting signals and said predefined transmission scheme.

3. The system of claim 1, having a plurality of airborne vehicles servicing geographically distinct coverage areas, wherein said plurality of airborne vehicles further comprises a network antenna for transmitting data to other airborne vehicles if a determined destination user of received data is located in a coverage area serviced by another airborne vehicle, the network antenna transmitting the received data to the other airborne vehicle which determines the user destination of the data and transmits the data to the user in the other airborne vehicle'"'"'s coverage area.

4. The system of claim 3, further comprising an operations controller with a wireless communication link to at least one of the airborne vehicles for supplying operations controlling information.

5. The system of claim 4, wherein said operations controller further comprises a link to a public or private external data network for generating communication links between users in coverage areas serviced by the plurality of airborne vehicles and stations connected to the external data network.

6. The system of claim 1, wherein said transmit and receive directed beam antennas are phased array antennas.

7. The system of claim 6, wherein said central processing unit includes means for generating the targeting signals to direct separate user targeting of said transmit and receive phased array antennas.

8. The system of claim 6, wherein said phased array antennas comprise phased array elements, wherein each phased array element comprises a double buffered shift register prestoring targeting signals according to the assigned data channels in the transmission scheme.

9. The system of claim 1, wherein said switching means is a fast packet switch.

10. The system of claim 1, wherein said transmission scheme is TDMA.

11. The system of claim 1, wherein said airborne vehicles are manned or unmanned.

12. A mobile communication system for wirelessly communication, comprising:

a plurality of ground based users, and

a plurality of airborne vehicles, each airborne vehicle servicing a predefined coverage area, each airborne vehicle further comprising;

a position determining means for generating airborne vehicle position information and position information of the users within the airborne vehicle'"'"'s coverage area;

a central processing unit for generating targeting signals according to said generated airborne vehicle and user position information;

an assigning means for assigning at least one transmit and at least one receive data channel of a predefined transmission scheme to each user, wherein the at least one transmit and receive data channels occur at different time intervals according to a predefined timing protocol;

a receive directed beam antenna for receiving data according to said generated targeting signals and said assigned at least one receive data channel;

a switching means for determining a destination user of said received data;

a transmit directed beam antenna for transmitting said received data to said determined destination user at said assigned transmit data channel according to said generated targeting signals, if the determined destination user is within the coverage area of the airborne vehicle; and

a network antenna for transmitting data to other airborne vehicles, if the determined destination user of received data is located in a coverage area serviced by another airborne vehicle, the network antenna transmitting the received data to the other airborne vehicle which determines the user destination of the data and transmits the data to the user in the other airborne vehicle'"'"'s coverage area.

13. The system of claim 12, wherein each of said plurality of users comprises:

a position determining means for generating user position information of each user of said plurality of users;

a central processing unit for generating targeting signals according to said generated user position information; and

transmit and receive antennas for receiving and transmitting data according to said generated targeting signals and said predefined transmission scheme.

14. The system of claim 12, further comprising an operations controller with a wireless communication link to at least one airborne vehicle for supplying operations controlling information to the airborne vehicles.

15. The system of claim 14, wherein said operations controller further comprises a communication link to a public data network for generating communication links between users in coverage areas serviced by the plurality of airborne vehicles and stations connected to the public data-network.

16. The system of claim 12, wherein said transmit and receive directed beam antennas are phased array antennas.

17. The system of claim 16, wherein said central processing unit includes means for generating the targeting signals to direct separate user targeting of said transmit and receive phased array antennas.

18. The system of claim 16, wherein said phased array antennas comprise phased array elements, each phased array element comprising a double buffered shift register prestoring targeting signals according to said assigned data channels in said transmission scheme.

19. The system of claim 12, wherein said switching means is a fast packet switch.

20. The system of claim 12, wherein said transmission scheme is TDMA.

21. The system of claim 12, wherein said airborne vehicles are manned or unmanned.

22. An airborne vehicle for transmitting and receiving communication data from a plurality of users within a predefined coverage area, said airborne vehicle further comprising:

an attitude determining mechanism for generating attitude reference information;

a position determining means for generating position information of said at least one airborne vehicle relative to each of the plurality of users;

a central processing unit for generating targeting signals according to said generated attitude reference information and position information;

an assigning means for assigning at least one transmit and at least one receive data channel of a predefined transmission scheme to each user, wherein data channel transmission and reception occurs at different time intervals of a predefined timing protocol;

a receive directed beam antenna for receiving data according to said generated targeting signals;

a switching means for determining the destination of said received data; and

a transmit directed beam antenna for transmitting said received data to said determined destination at said assigned transmit data channel according to said assigned data channels and said generated targeting signals.

23. The system of claim 22, wherein said transmit and receive directed beam antennas are phased array antennas.

24. The system of claim 23, wherein said central processing unit includes means for generating the targeting signals to direct separate user targeting of said transmit and receive phased array antennas.

25. The system of claim 23, wherein said phased array antennas comprise phased array elements comprising a double buffered shift register for prestoring targeting signals for each phased array element of the phased array antennas.

26. The system of claim 22, wherein said switching means is a fast packet switch.

27. The system of claim 22, wherein said transmission scheme is TDMA.

28. The system of claim 22, wherein said airborne vehicles are unmanned.

29. A method for wirelessly communicating between a plurality of users by use of an airborne vehicle servicing a coverage area, comprising:

determining attitude reference information and position information of each user of said plurality of users and of said at least one airborne vehicle relative to each of the plurality of users within the coverage area;

generating targeting signals according to said generated attitude reference information and position information;

assigning at least one transmit and at least one receive data channel of a predefined transmission scheme to each user, wherein data channel transmission and reception occur at different time intervals of a predefined timing protocol;

receiving data from each user at said assigned receive data channel according to said generated targeting signals using a first directed beam antenna;

determining the destination of said received data; and

transmitting said received data to said determined destination at said assigned transmit data channel according to said assigned data channels and said generated targeting signals using a second beam antenna.

30. The method of claim 29, wherein the directed beam antennas are phased array antennas.

31. The method of claim 30, wherein the generating of targeting signals generates separate boresight information for the transmit and receive phased array antennas.

32. The method of claim 30, wherein said phased array antennas comprise phased array elements each phased array element comprising a double buffered shift register for prestoring targeting signals for each phased array element of the phased array antennas.