Method and apparatus for using satellites for reverse path communication in direct-to-home subscription information systems

• US 5,708,963 A
• Filed: 02/24/1995
• Issued: 01/13/1998
• Est. Priority Date: 02/24/1995
• Status: Expired due to Term

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Scientific-Atlanta Incorporated (Cisco Systems, Inc.)
• Inventors: Mobley, J. Graham, Summers, Macy W.
• Primary Examiner(s): Pham, Chi H.
• Assistant Examiner(s): ARTHUR JEANGLAUDE, GERTRUDE
• Application Number:
  US08/390,461
• Time in Patent Office: 1,054 Days
• Field of Search: 455/3.2, 455/5.1, 455/4.1, 455/4.2, 455/12.1, 455/73, 455/74, 455/129, 455/131, 455/13.2, 340/825.08, 340/825.54, 348/6, 348/12, 348/13, 343/725, 343/727
• US Class Current: 455/12.1
• CPC Class Codes: H04B 7/18571 for satellites; for fixed or mobile stations
• CPC Class Codes: H04B 7/18597 Arrangements for system physical machines management, i.e. for construction, operations control, administration, maintenance
• CPC Class Codes: H04H 40/90 specially adapted for satellite broadcast receiving
• CPC Class Codes: H04N 7/20 Adaptations for transmission via a GHz frequency band, e.g. via satellite

Abstract

Apparatus for using a low earth orbit satellite for reverse path communication in a subscription information service delivery system comprises a receiver adapted to receive a subscription information service signal at frequencies exceeding 1 GHz via a first path. Responsive to a poll, the receiver is adapted to transmit a response signal to the poll at frequencies under 1 GHz via a second path to a low earth orbit satellite. The polling request may be transmitted with the subscription information service signal or through the low earth orbit satellite. Preferably, the polling request is addressed and comprises a response message length field. The response comprises a service provider identifier and a subscriber identifier and further, preferably comprises response data encrypted by a key known to the service provider.

Claims

1. Receiver apparatus for receiving a subscription information service signal at frequencies exceeding 1 Ghz via a first path and transmitting, responsive to a poll, a response signal by a subscriber, at frequencies under 1 Ghz via a second path directly to a low earth orbit satellite, the apparatus comprising:

a memory for storing data entered by the subscriber, related to the subscription information service acceptance by said subscriber; and

a transmitter responsive to a polling request for transmitting the stored data entered by the subscriber, and subscriber identification data modulated onto a signal at frequencies under 1 Ghz via the second path directly to the low earth orbit satellite.

2. The receiver apparatus of claim 1 wherein the transmitted data further includes a service provider identifier.

3. The receiver apparatus of claim 1 wherein the subscription information service acceptance data comprises one of conditional access data and viewing statistics data.

4. The receiver apparatus of claim 1 wherein the subscription information service acceptance data is encrypted.

5. The receiver apparatus of claim 1 wherein the transmitted data further includes a time-of-day field.

6. The receiver apparatus of claim 1 wherein the transmitted data further includes a more-to-come flag.

7. The receiver apparatus of claim 1 wherein the transmitted data further includes a memory full flag.

8. The receiver apparatus of claim 1 wherein the data transmission is responsive to a poll transmitted with the subscription information service signal.

9. The receiver apparatus of claim 1 wherein the data transmission is responsible to a poll received from the low earth orbit satellite.

10. The receiver apparatus of claim 9 wherein the poll transmission to the low earth satellite includes a data field representing the time interval until the low earth orbit satellite is visible to a group of receivers to be polled including the receiver apparatus.

11. The receiver apparatus of claim 1 wherein the poll comprises a group addressed communication including a poll command.

12. The receiver apparatus of claim 11 wherein the addressed communication further comprises a response message length definition field.

13. A method for polling a receiver of a subscription information service signal, the method comprising the steps of:

polling a receiver of a subscription information service;

forwarding a subscription information service signal at frequencies exceeding 1 Ghz via a first path;

storing data entered by a subscriber, related to the subscription information service acceptance by said subscriber; and

transmitting, responsive to the polling step, the stored data entered by the subscriber and subscriber identification data modulated onto a signal at frequencies under 1 Ghz via a second path directly to a low earth orbit satellite.

14. A polling method according to claim 13 further comprising the step of

receiving the polling request along with the subscription information service signal.

15. A polling method according to claim 13 further comprising the step of

receiving the polling request via the second path to the low earth orbit satellite.

16. A polling method according to claim 13 further comprising the step of

transmitting a more-to-come flag along with the stored data.

17. A polling method according to claim 13 further comprising the step of

transmitting a memory full flag along with the stored data.

18. A polling method according to claim 13 further comprising the step of

transmitting a time-of-day field along with the stored data.

19. A polling method according to claim 13 further comprising the step of

transmitting subscriber identification data along with the stored data.

20. A polling method according to claim 13 further comprising the step of

encrypting the stored data prior to transmission.

21. A polling method according to claim 20 further comprising the step of

encrypting the stored data according to a key known to a service provider from subscriber identification data transmitted with the response to the polling request.

22. A method according to claim 21 wherein the data related to the information services comprises program selection data and the service delivery step includes delivery of a selected program.

23. A method according to claim 21 wherein the data related to the information services comprises conditional access data and the service delivery step includes modification of terminal credit memory.

24. A method according to claim 21 wherein the data related to the information service comprises terminal location data and the service delivery step includes deactuation of the terminal when the terminal has been relocated.

25. A method according to claim 21 wherein the data related to the information service is polled at a time when first and second low earth orbit satellites are visible to the terminal and further comprises the step of determining the location of the polled terminal.

26. A method according to claim 21 wherein the data related to the information service is polled on first and second passes of a low earth orbit satellite over a terminal and the location of the passing low earth orbit satellite has changed relative to the terminal at the time of the poll and further comprises the step of determining the location of the polled terminal.

27. The method of offering information services to a subscriber and delivering or refusing services to the subscriber or to a service pirate of a subscription information service delivery system comprising the steps of:

offering information services to a subscriber;

initiating a poll request signal;

generating data related to the information services at a terminal;

storing said data at the terminal;

directly transmitting to a low earth orbit satellite, a poll response signal at frequencies under 1 Ghz via a first path wherein the poll response signal comprises the stored data and a subscriber identifier;

receiving the poll response signal;

processing the data at a control center; and

delivering services or refusing services over a second path at frequencies exceeding 1 Ghz to the subscriber responsive to the data processing.

28. A method for receiving and responding to a polling request, wherein said polling request is integrated with a subscription information signal, the method comprising the steps of:

receiving a subscription information service signal and a polling request from a geostationary satellite at frequencies exceeding 1 Ghz via a first path;

storing data related to the subscription information service acceptance by a subscriber; and

transmitting, responsive to the polling request, the stored data and subscriber identification data modulated onto a signal at frequencies under 1 Ghz via a second path to a low earth orbit satellite.

29. The method for receiving according to claim 28 where said stored data is at least one of the group comprising:

conditional access data, viewing statistics data, home shopping data, subscriber messaging or service request data.

30. The method for receiving according to claim 28 further comprising the step of transmitting a more-to-come flag along with the stored data.

31. The method for receiving according to claim 28 further comprising the step of transmitting a memory full flag along with the stored data.

32. The method for receiving according to claim 28 further comprising the step of transmitting a time-of-day field along with the stored data.

33. The method for receiving according to claim 28 further comprising the step of transmitting subscriber identification data along with the stored data.

34. The method for receiving according to claim 28 further comprising the step of encrypting the stored data prior to transmission.

35. The method for receiving according to claim 34 further comprising the step encrypting the stored data according to a key known to a service provider from subscription identification data transmitted with the response to the polling request.

36. A method for receiving a polling request and a subscription information signal, and responding to said polling request, the method comprising the steps of:

receiving a polling request from a first satellite;

receiving a subscription information service signal at frequencies exceeding 1 Ghz via a second satellite;

storing data related to the subscription information service acceptance by a subscriber; and

transmitting, responsive to the polling request, the stored data and subscriber identification data modulated onto a signal at frequencies under 1 Ghz via first satellite.

37. The method for receiving according to claim 36 where said stored data is at least one of the group comprising:

conditional access data, viewing statistics data, home shopping data, subscriber messaging or service request data.

38. The method for receiving according to claim 36 further comprising the step of transmitting a more-to-come flag along with the stored data.

39. The method for receiving according to claim 36 further comprising the step of transmitting a memory full flag along with the stored data.

40. The method for receiving according to claim 36 further comprising the step of transmitting a time-of-day field along with the stored data.

41. The method for receiving according to claim 36 further comprising the step of transmitting subscriber identification data along with the stored data.

42. The method for receiving according to claim 36 further comprising the step of encrypting the stored data prior to transmission.

43. The method for receiving according to claim 42 further comprising the step of encrypting the stored data according to a key known to a service provider from subscription identification data transmitted with the response to the polling request.