Method and apparatus for multi-constellation satellite broadcast with error correction

• US 6,088,571 A
• Filed: 01/30/1998
• Issued: 07/11/2000
• Est. Priority Date: 01/30/1998
• Status: Expired due to Term

• Current Assignee: CDC Propriete Intellectuelle
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Kane, John Richard, Olds, Keith Andrew
• Primary Examiner(s): Tsang, Fan
• Assistant Examiner(s): SOBUTKA, PHILIP
• Application Number:
  US09/015,955
• Time in Patent Office: 893 Days
• Field of Search: 455/12.1, 455/13.1, 455/13.2, 455/15, 455/16, 455/18, 455/24, 455/7, 455/8, 455/9, 455/3.2, 455/5.1, 455/427, 455/428, 455/430, 370/316
• US Class Current: 455/12.1
• CPC Class Codes: H04B 7/18523 Satellite systems for providing broadcast service to terrestrial stations, i.e. broadcast satellite service arrangements specially adapted for satellite broadcast receiving H04H40/90; picture transmission via satellite H04N1/00103; television transmission via satellite H04N7/20
• CPC Class Codes: H04B 7/195 Non-synchronous stations

Abstract

A hybrid satellite-based data broadcast system reliably broadcasts data from a ground-based high earth orbit, HEO, server (105) to a plurality of customer provided equipment, CPE, receivers (113) via a HEO satellite constellation satellite (109). When errors in received broadcast data are detected by the CPE (113), error information is communicated via a low earth orbit, LEO, satellite constellation (121, 125) to a LEO gateway (103) which in turn obtains the correct data and transmits the correct data back to the CPE receiver via the LEO satellite constellation (121, 125).

Claims

1. A method of broadcasting data to a plurality of receivers, comprising the steps of:

receiving said data at a first satellite communication server;

broadcasting said data from said server via a high earth orbit, HEO, satellite to a plurality of receivers;

receiving by satellite transmission an indication that a portion of said data received at one receiver of said plurality of receivers contained errors; and

transmitting said portion of said broadcast data corresponding to said data that was in error to said one receiver via a low earth orbit, LEO, satellite constellation.

2. A method in accordance with claim 1, comprising:

receiving said indication via said LEO satellite constellation.

3. A method in accordance with claim 2, wherein:

said HEO satellite is a GEO satellite.

4. A method in accordance with claim 1, wherein:

said HEO satellite is a GEO satellite.

5. A method in accordance with claim 1, comprising:

storing said data in a memory prior to said broadcasting step; and

obtaining said portion from said memory prior to said transmitting step.

6. A method of broadcasting data to a plurality of receivers, comprising the steps of:

receiving said data at a first satellite communication server;

broadcasting said data from said server to a plurality of receivers via a first satellite constellation;

receiving by satellite transmission an indication that a portion of said data received at one receiver of said plurality of receivers contained errors; and

transmitting a first portion of said data corresponding to said portion of said broadcast data to said one receiver via a second satellite constellation.

7. A method in accordance with claim 6, wherein:

said first satellite constellation is a HEO satellite constellation and said second satellite constellation is a LEO satellite constellation.

8. A method in accordance with claim 7, wherein:

said HEO satellite constellation comprises a GEO satellite.

9. A method in accordance with claim 6, comprising:

storing said broadcast data in a memory prior to said broadcast step; and

obtaining said first portion from said memory.

10. A method in accordance with claim 6, comprising:

receiving said error indication from said one receiver via said second satellite constellation.

11. A method of operating apparatus receiving satellite broadcast data, said method comprising the steps of:

receiving broadcast data via a first satellite constellation;

determining whether said data contains errors;

transmitting an indication that a portion of said received broadcast data contains errors via a second satellite constellation; and

receiving a first data portion corresponding to said error containing portion via said second satellite constellation.

12. A method in accordance with claim 11, comprising:

utilizing a first antenna to receive said broadcast data from a first satellite of said first satellite constellation; and

utilizing a second antenna to transmit said indication and to receive said first data portion.

13. A method in accordance with claim 12, wherein:

said second satellite constellation comprises a plurality of second satellites.

14. A method in accordance with claim 13, comprising:

utilizing said second antenna to maintain a first communication link via a first one of said second satellites;

utilizing said first antenna to acquire a second communication link via a second one of said second satellites during a predetermined time; and

subsequent to said first antenna acquiring said second communication link, utilizing said second antenna to receive said broadcast data.

15. A method in accordance with claim 14, wherein:

said plurality of second satellites comprises LEO satellites.

16. A method in accordance with claim 15, wherein:

said first satellite constellation comprises one or more HEO satellites.

17. A method in accordance with claim 16, wherein:

said one or more HEO satellites comprises one or more GEO satellites.

18. Apparatus for broadcasting data to a plurality of receivers via at least one HEO satellite, comprising:

a first satellite communication server, said server receiving said data, and broadcasting said data via said at least one HEO satellite to said plurality of receivers;

means for receiving by satellite transmission an indication that a portion of said data received at one receiver of said plurality of receivers contained errors; and

means for transmitting a first portion of said broadcast data corresponding to said error containing portion of said data to said one receiver via a LEO satellite constellation.

19. Apparatus in accordance with claim 18, wherein:

said receiving means receives said indication via said LEO satellite constellation.

20. Apparatus in accordance with claim 19, wherein:

said at least one HEO satellite is a GEO satellite.

21. Apparatus in accordance with claim 18, wherein:

said at least one HEO satellite is a GEO satellite.

22. Apparatus in accordance with claim 18, comprising:

memory for storing said broadcast data; and

means for obtaining said first portion from said memory.

23. Apparatus for broadcasting data to a plurality of receivers comprising:

a first satellite communication server receiving said data and broadcasting said data to a plurality of receivers via a first satellite constellation;

means for receiving by satellite transmission an indication that a portion of said broadcast data received at one receiver of said plurality of receivers contained errors; and

means for transmitting a first portion of said data corresponding to said portion of said broadcast data to said one receiver via a second satellite constellation.

24. Apparatus in accordance with claim 23, wherein:

said first satellite constellation is a HEO satellite constellation and said second satellite constellation is a LEO satellite constellation.

25. Apparatus in accordance with claim 24, wherein:

said HEO satellite constellation comprises a GEO satellite.

26. Apparatus in accordance with claim 23, comprising:

a memory for storing said broadcast data; and

means for obtaining said first portion from said memory.

27. Apparatus in accordance with claim 23, wherein:

said receiving means receives said error indication from said one receiver via said second satellite constellation.

28. Apparatus for receiving satellite broadcast data, comprising:

a receiver coupled to receive first and second data from first and second satellite constellations, respectively;

a transmitter coupled to transmit third data to said second satellite constellation;

a processor, coupled to said receiver and said transmitter, wherein said processor determines whether at least a portion of said first data is in error, and wherein said processor causes said third data to be transmitted to said second satellite constellation thereby indicating that at least said portion of said first data is in error; and

wherein said receiver receives said second data from said second satellite constellation corresponding to at least said portion of said first data that was in error.

29. Apparatus in accordance with claim 28, comprising:

a first antenna, said first antenna being utilized to receive said first data from a first satellite of said first satellite constellation; and

a second antenna, said second antenna being utilized to transmit said third data and to receive said second data.

30. Apparatus in accordance with claim 29, wherein:

said second satellite constellation comprises a plurality of second satellites.

31. Apparatus in accordance with claim 30, comprising:

means for utilizing said second antenna to maintain a first communication link via a first one of said second satellites and for utilizing said first antenna to acquire a second communication link via a second one of said second satellites during a predetermined time and for utilizing said second antenna to receive said second data subsequent to said first antenna acquiring said second communication link.

32. Apparatus in accordance with claim 31, wherein:

said plurality of second satellites comprises LEO satellites.

33. Apparatus in accordance with claim 32, wherein:

said first satellite constellation comprises one or more HEO satellites.

34. Apparatus in accordance with claim 33, wherein:

said one or more HEO satellites comprises one or more GEO satellites.