Method and apparatus for providing commercial broadcasting service in cellular mobile communication network

• US 20030078061A1
• Filed: 10/23/2002
• Published: 04/24/2003
• Est. Priority Date: 10/23/2001
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd. (Samsung Group)
• Original Assignee: Samsung Electronics Co. Ltd. (Samsung Group)
• Inventors: Kim, Hoe-Won
• Granted Patent: US 6,873,853 B2
• Time in Patent Office: Days
• US Class Current: 455/466
• CPC Class Codes: H04L 2209/601 Broadcast encryption
• CPC Class Codes: H04L 2463/101 applying security measures for digital rights management data processing systems or methods, specially adapted for commerce, e.g. marketing, shopping, billing, auctions or e-commerce G06Q30/00
• CPC Class Codes: H04L 63/068 using time-dependent keys, e.g. periodically changing keys cryptographic mechanisms or cryptographic arrangements for controlling usage of secret information H04L9/088
• CPC Class Codes: H04L 9/0891 Revocation or update of secret information, e.g. encryption key update or rekeying
• CPC Class Codes: H04N 21/2347 involving video stream encryption
• CPC Class Codes: H04N 21/25808 Management of client data terminal profiles in network data switching protocols H04L67/303
• CPC Class Codes: H04N 21/26606 for generating or managing entitlement messages, e.g. Entitlement Control Message [ECM] or Entitlement Management Message [EMM] arrangements for conditional access to broadcast information or to broadcast-related services H04H60/14
• CPC Class Codes: H04N 21/41407 embedded in a portable device, e.g. video client on a mobile phone, PDA, laptop constructional details of equipment or arrangements specially adapted for portable computer application G06F1/1626; arrangements specially adapted for mobile receivers in broadcast systems H04H20/57
• CPC Class Codes: H04N 21/4405 involving video stream decryption
• CPC Class Codes: H04N 21/6131 involving transmission via a mobile phone network wireless downlink channel access H04W74/006
• CPC Class Codes: H04N 21/6181 involving transmission via a mobile phone network arrangements for providing broadcast or conference services to substation in data switching networks in combination with wireless systems H04L12/189; wireless uplink channel access H04W74/004
• CPC Class Codes: H04N 21/63345 by transmitting keys key distribution for secret or secure communication H04L9/08; network support of key management H04L63/06
• CPC Class Codes: H04N 7/165 Centralised control of user terminal subsequent to an upstream request signal H04N7/17345; Registering at central by two-way working H04N7/17309
• CPC Class Codes: H04N 7/17318 Direct or substantially direct transmission and handling of requests
• CPC Class Codes: H04W 12/03 Protecting confidentiality, e.g. by encryption
• CPC Class Codes: H04W 12/04 Key management, e.g. using generic bootstrapping architecture [GBA]
• 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
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 76/40 for selective distribution or broadcast

Abstract

A method and an apparatus for providing only authorized mobile subscribers with a specified commercial broadcasting service in a cellular mobile communication network. A base station transmits a control signal including a common traffic ciphered key having a specified validation period through a dedicated secure signal channel assigned to a respective authorized subscriber terminal. The base station then enciphers broadcasting data from a broadcasting system with the common traffic ciphered key, for broadcasting through a common traffic broadcasting channel. The base station periodically updates the common traffic ciphered key according to the corresponding validation period. A subscriber terminal obtains the common traffic ciphered key from the control signal received through the dedicated secure signal channel, and deciphers the broadcasting signal with the obtained common traffic ciphered key to obtain therefrom the broadcasting data. The broadcasting data is displayed after a predetermined video signal processing.

Claims

1. A method for providing a commercial type of broadcasting service through a wireless channel in a base station of a cellular mobile communication system network, comprising the steps of:

transmitting a control signal with a common traffic ciphered key having a specified validation period, through a secure signal channel assigned exclusively to a respective authorized subscriber terminal for the broadcasting service; and

enciphering a series of broadcasting data received from a broadcasting system, with the common traffic ciphered key, and then broadcasting the series of broadcasting data through a common traffic broadcasting channel.

2. The method according to claim 1, further comprising the step of periodically updating the common traffic ciphered key according to said specified validation period.

3. The method according to claim 2, wherein said validation period is variably defined according to a number of the authorized subscriber terminal for the broadcasting service and a bandwidth of the secure signal channel.

4. The method according to claim 1, wherein the control signal is enciphered with a private signal key assigned to the respective authorized subscriber terminal for signal processing in association with the base station.

5. The method according to claim 2, wherein the control signal is enciphered with a private signal key assigned to the respective authorized subscriber terminal for signal processing in association with the base station.

6. The method according to claim 1, wherein the secure signal channel for the common traffic broadcasting channel and all the authorized subscriber terminals is configured to be mapped in time division onto an identical physical channel.

7. The method according to claim 2, wherein the secure signal channel for the common traffic broadcasting channel and all the authorized subscriber terminals is configured to be mapped in time division onto an identical physical channel.

8. The method according to claim 1, wherein the secure signal channel is configured to be mapped onto a physical channel reserved for all the authorized subscriber terminals.

9. The method according to claim 2, wherein the secure signal channel is configured to be mapped onto a physical channel reserved for all the authorized subscriber terminals.

10. A method for receiving a commercial type of broadcasting service through a wireless channel in a mobile subscriber terminal of a cellular mobile communication system network, comprising the steps of:

deciphering a control signal received through a dedicated secure signal channel with a private signal key assigned to a respective mobile subscriber terminal to obtain therefrom a common traffic ciphered key having a specified validation period;

deciphering a broadcasting signal received through a common traffic broadcasting channel with the common traffic ciphered key to generate therefrom a series of broadcasting data; and

displaying the broadcasting data in accordance with a predetermined video signal processing.

11. The method according to claim 10, further comprising the step of enciphering the control signal with the private signal key and then transmitting the ciphered control signal through the secure signal channel.

12. An apparatus for providing a commercial type of broadcasting service to a mobile subscriber terminal through a wireless channel in a cellular mobile communication system network, comprising:

a broadcasting system for formatting a set of video data provided from a video resource so as to be suited to the mobile communication network;

at least one base station for transmitting a control signal including a common traffic ciphered key having a specified validation period through a dedicated secure signal channel assigned to a respective authorized subscriber terminal for the broadcasting service and then enciphering the formatted broadcasting data provided from the broadcasting system, with the common traffic ciphered key, for broadcasting through a common traffic broadcasting channel; and

at least one mobile subscriber terminal for obtaining the common traffic ciphered key from the control signal received through the dedicated secure signal channel, for deciphering the broadcasting signal received through the common traffic broadcasting channel with the obtained common traffic ciphered key to obtain therefrom the broadcasting data, and for displaying the broadcasting data after a predetermined video signal processing thereto.

13. The apparatus according to claim 12, wherein the base station is configured to periodically update the common traffic ciphered key according to the specified validation period.

14. The apparatus according to claim 13, wherein the validation period is variably defined depending upon a number of the authorized subscriber terminals and a bandwidth of the secure signal channel.

15. The apparatus according to claim 12, wherein the control signal is enciphered with a private signal key assigned to the respective authorized subscriber terminal for signal processing in association with the base station.

16. The apparatus according to claim 13, wherein the control signal is enciphered with a private signal key assigned to the respective authorized subscriber terminal for signal processing in association with the base station.

17. The apparatus according to claim 12, wherein the secure signal channel for the common traffic broadcasting channel and all the authorized subscriber terminals is configured to be mapped in time division onto an identical physical channel.

18. The apparatus according to claim 13, wherein the secure signal channel for the common traffic broadcasting channel and all the authorized subscriber terminals is configured to be mapped in time division onto an identical physical channel.

19. The apparatus according to claim 12, wherein the secure signal channel is configured to be mapped onto a physical channel reserved for all the authorized subscriber terminals.

20. The apparatus according to claim 13, wherein the secure signal channel is configured to be mapped onto a physical channel reserved for all the authorized subscriber terminals.