Conditional access for a multimedia broadcast service using a wireless terminal

• US 20060115084A1
• Filed: 11/18/2005
• Published: 06/01/2006
• Est. Priority Date: 11/19/2004
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Ryu, Song-Pil
• Granted Patent: US 8,190,896 B2
• Time in Patent Office: Days
• US Class Current: 380/247
• CPC Class Codes: H04H 60/16 on playing information
• CPC Class Codes: H04H 60/21 Billing for the use of broadcast information or broadcast-related information
• CPC Class Codes: H04H 60/23 using cryptography, e.g. encryption, authentication, key distribution
• CPC Class Codes: H04H 60/91 Mobile communication networks for accessing the Internet H04H60/85
• CPC Class Codes: H04L 12/189 in combination with wireless systems selective distribution or broadcast in wireless communication networks H04W4/06
• CPC Class Codes: H04L 63/0428 wherein the data content is protected, e.g. by encrypting or encapsulating the payload
• CPC Class Codes: H04L 63/18 using different networks or channels, e.g. using out of band channels cryptographic mechanisms or cryptographic arrangements for key distribution involving distinctive intermediate devices or communication paths H04L9/0827; cryptographic mechanisms or cryptographic arrangements for authentication using a plurality of channels H04L9/3215
• CPC Class Codes: H04W 12/033 of the user plane, e.g. user's traffic
• CPC Class Codes: H04W 4/06 Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services

Abstract

The present invention relates to conditional access for receiving a broadcast service. The present invention comprises requesting reception of a service from a wireless cellular communication network, receiving at least one encryption key from the wireless cellular communication network for decrypting encrypted service data, wherein the at least one encryption key is generated by a non-cellular broadcast station, receiving the encrypted service data from the non-cellular broadcast station, the encrypted service data having at least one encryption key, decrypting the encrypted service data if the at least one encryption key received from the wireless cellular communication network matches the at least one encryption key of the encrypted service data, and providing the decrypted service data. Preferably, fee charging information related to providing the decrypted service data is monitored and provided to a fee charging authority to allow a fee to be charged based on the fee charging information.

Claims

1. A method for receiving a broadcast service in a wireless communication system, the method comprising:

requesting reception of a service from a wireless cellular communication network;

receiving at least one encryption key from the wireless cellular communication network for decrypting encrypted service data, wherein the at least one encryption key is generated by a non-cellular broadcast station;

receiving the encrypted service data from the non-cellular broadcast station, the encrypted service data having at least one encryption key;

decrypting the encrypted service data if the at least one encryption key received from the wireless cellular communication network matches the at least one encryption key of the encrypted service data; and

providing the decrypted service data.

2. The method of claim 1, further comprising:

monitoring fee charging information related to providing the decrypted service data; and

providing the fee charging information to a fee charging authority to allow a fee to be charged based on the fee charging information.

3. The method of claim 1, further comprising blocking the encrypted service data from being decrypted if the at least one encryption key received from the wireless cellular communication network does not match the encryption key of the encrypted service data.

4. The method of claim 1, wherein the fee charging authority is at least one of:

the wireless cellular communication network; and

the non-cellular broadcasting station.

5. The method of claim 1, wherein the at least one encryption key is based on a Public Key Infrastructure.

6. The method of claim 1, wherein the encrypted service data is compression image data.

7. The method of claim 1, wherein the encryption key is inserted into a specific part of a corresponding frame or a specific data header of the encrypted service data to encrypt the service data.

8. The method of claim 1, wherein the encrypted service data is decrypted using a conditional access function of Eureka-147.

9. The method of claim 7, wherein the non-cellular broadcasting station periodically updates the encryption key and inserts the updated encryption key into the service data to update the encryption of the service data before transmitting to a receiver.

10. The method of claim 9, wherein a period for updating the encryption key comprises at least one of:

a day;

a morning;

an afternoon;

an evening; and

a unitary time.

11. The method of claim 1, wherein the at least one encryption key is received in a short message service (SMS) format.

12. The method of claim 1, wherein the at least one encryption key is for decrypting, for a certain time, requested encrypted service data.

13. The method of claim 1, wherein the step of requesting reception of a service from a wireless cellular communication network comprises at least one of:

requesting a specific TDMB program; and

requesting a specific TDMB channel.

14. The method of claim 1, wherein the step of requesting reception of a service from a wireless cellular communication network comprises requesting the service as a time unit.

15. The method of claim 1, further comprising extracting the at least one encryption key from a short message service (SMS), message prior to decrypting the encrypted service data.

16. The method of claim 2, wherein the step of monitoring fee charging information comprises counting a time duration for receiving the decrypted service data.

17. The method of claim 2, wherein the fee to be charged is based on at least one of:

a number of times the decrypted service data is provided; and

a number of channels the decrypted service data is provided on.

18. A mobile communication terminal for receiving a broadcast service, the mobile communication terminal comprising:

a transmitter for transmitting signals to at least one network;

a receiver for receiving signals from the at least one network; and

a processor cooperating with the transmitter and the receiver for;

requesting reception of a service from a wireless cellular communication network;

receiving at least one encryption key from the wireless cellular communication network for decrypting encrypted service data, wherein the at least one encryption key is generated by a non-cellular broadcast station;

receiving the encrypted service data from the non-cellular broadcast station, the encrypted service data having at least one encryption key;

decrypting the encrypted service data if the at least one encryption key received from the wireless cellular communication network matches the at least one encryption key of the encrypted service data; and

providing the decrypted service data.

19. The mobile communication terminal of claim 18, wherein the processor monitors fee charging information related to providing the decrypted service data and provides the fee charging information to a fee charging authority to allow a fee to be charged based on the fee charging information.

20. The mobile communication terminal of claim 18, wherein the encrypted service data is blocked from being decrypted if the at least one encryption key received from the wireless cellular communication network does not match the encryption key of the encrypted service data.

21. The mobile communication terminal of claim 18, wherein the fee charging authority is at least one:

the wireless cellular communication network; and

the non-cellular broadcasting station.

22. The mobile communication terminal of claim 18, wherein the encryption key is based on a Public Key Infrastructure.

23. The mobile communication terminal of claim 18, wherein the encrypted service data is compression image data.

24. The mobile communication terminal of claim 18, wherein an encryption key is inserted into a specific part of a corresponding frame or a specific data header of the encrypted service data to encrypt the service data.

25. The mobile communication terminal of claim 18, wherein the encrypted service data is decrypted using a conditional access function of Eureka-147.

26. The mobile communication terminal of claim 24, wherein the non-cellular broadcasting station periodically updates the encryption key and inserts the updated encryption key into the service data to update the encryption of the service data before transmitting to a receiver.

27. The mobile communication terminal of claim 26, wherein a period for updating the encryption key comprises at least one of:

a day;

a morning;

an afternoon;

an evening; and

a unitary time.

28. The mobile communication terminal of claim 18, wherein the at least one encryption key is received in a short message service (SMS) format.

29. The mobile communication terminal of claim 18, wherein the at least one encryption key is for decrypting, for a certain time, requested encrypted service data.

30. The mobile communication terminal of claim 18, wherein the step of requesting reception of a service from at least one network comprises at least one of:

requesting a specific TDMB program; and

requesting a specific TDMB channel.

31. The mobile communication terminal of claim 18, wherein the step of requesting reception of a service from at least one network comprises requesting the service as a time unit.

32. The mobile communication terminal of claim 18, wherein the processor extracts the at least one encryption key from a short message service (SMS) message prior to decrypting the encrypted service data.

33. The mobile communication terminal of claim 19, wherein the processor monitors fee charging information by counting a time duration for receiving the decrypted service data.

34. The method of claim 19, wherein the fee to be charged is based on at least one of:

a number of times the decrypted service data is provided; and

a number of channels the decrypted service data is provided on.

35. A system for broadcasting a service in a wireless communication system, the system comprising:

a non-cellular broadcasting station for generating at least one encryption key for decrypting encrypted service data, transmitting the at least one encryption key to a wireless cellular communication network and transmitting the encrypted service data to a mobile communication terminal;

the wireless cellular communication network for receiving requests from the mobile communication terminal and transmitting the at least one encryption key received from the non-cellular broadcasting station to the mobile communication terminal; and

the mobile communication terminal for;

requesting reception of a service from the wireless cellular communication network;

receiving the at least one encryption key from the wireless cellular communication network for decrypting the encrypted service data;

receiving the encrypted service data from the non-cellular broadcasting station, the encrypted service data having at least one encryption key;

decrypting the encrypted service data if the at least one encryption key received from the wireless cellular communication network matches the at least one encryption key of the encrypted service data; and

providing the decrypted service data;

36. The system of claim 35, wherein the mobile communication terminal monitors fee charging information related to providing the decrypted service data and provides the fee charging information to a fee charging authority to allow a fee to be charged based on the fee charging information.

37. The system of claim 35, wherein the mobile terminal blocks the encrypted service data from being decrypted if the at least one encryption key received from the wireless communication network does not match the at least one encryption key of the encrypted service data.