Method of distributed ipmp device messaging and carriage of rights in mpeg ipmp content

• US 20050204067A1
• Filed: 02/04/2003
• Published: 09/15/2005
• Est. Priority Date: 02/05/2002
• Status: Active Grant

• Current Assignee: Sovereign Peak Ventures, LLC (Dominion Harbor Enterprises, LLC)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Shen, Sheng Mei, Huang, Zhongyang, Ji, Ming, Senoh, Takanori
• Granted Patent: US 7,436,958 B2
• Time in Patent Office: Days
• US Class Current: 709/250
• CPC Class Codes: H04L 2101/622 Layer-2 addresses, e.g. medium access control [MAC] addresses
• 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 61/00 Network arrangements, protocols or services for addressing or naming
• CPC Class Codes: H04L 63/0869 for achieving mutual authentication cryptographic mechanisms or cryptographic arrangements for mutual authentication H04L9/3273
• CPC Class Codes: H04N 21/2541 Rights Management protecting software against unauthorised usage in a vending or licensing environment G06F21/10; security in data switching network management H04L41/28; security management or policies for network security H04L63/20; access security in wireless networks H04W12/08
• CPC Class Codes: H04N 21/835 Generation of protective data, e.g. certificates protecting software against unauthorised usage in a vending or licensing environment G06F21/10

Abstract

The present invention relates to content and IPMP tool transfer among distributed IPMP devices. A set of messages is defined for distributed IPMP devices. These messages include content transfer message, IPMP tool transfer messages, as well device ID broadcasting messages. Using these messages, distributed devices can use a standard set of messages to establish a network, and exchange content protected by IPMP in an inter-operable way. It is also related to carriage of rights in MPEG system, especially in MPEG-4 system. Rights ES (Elementary Stream) is defined in MPEG-4 system, to carry rights information. The Rights ES is also attached with information including whether the rights carried in the ES is proprietary or not, and/or what should be the rights management tool to handle this Rights ES. With that, terminal can be built in an inter-operable way, and retrieve rights from a standardized position.

Claims

1. A method of messaging among distributed IPMP devices having a unique device ID to identify itself, the device ID assigned during the manufacturing time, or at the time of purchasing, the method comprising:

obtaining a domain ID for each IPMP device to identify the network domain it resides in, wherein the network means a group of IPMP devices;

broadcasting the IPMP device ID to neighboring IPMP devices, upon joining an IPMP devices'"'"' network domain; and

receiving an acknowledgement message including device ID of the neighboring IPMP devices, upon receiving the broadcasted device ID.

2. A method according to claim 1 further comprising the steps of:

receiving a content request message from an IPMP Device which is requesting a content identified by a certain content ID;

checking the domain ID sent in the request message, also checking the rights information associated with the requested content;

sending back a reply message, either positive or negative; and

starting to send the content using content transfer messages, when the reply message is positive.

3. A method according to claim 1 further comprising the steps of:

receiving a content request message from an IPMP Device which is requesting a content identified by a certain content ID;

checking the domain ID sent in the request message, also checking the rights information associated with the requested content;

sending back a reply message, either positive or negative;

choosing to do a mutual authentication with the IPMP Device, using mutual authentication messages defined in MPEG IPMP, to verify whether the IPMP Device is a trusted IPMP device; and

starting to send content using content transfer messages, wherein the content transfer message is carried as a payload as the secure message defined in MPEG IPMP to ensure its confidentiality, if the reply is positive and the mutual authentication is successful.

4. A method according to claim 1 further comprising the steps of:

receiving an IPMP tool request message from an IPMP Device which is requesting an IPMP tool identified by a certain tool ID;

checking the domain ID sent in the request message, also checking the availability of requested IPMP tool;

sending back a reply message, either positive or negative; and

carrying the requested IPMP tool in the positive reply message, if the reply message is positive.

5. A method according to claim 1 further comprising the steps of:

receiving an IPMP tool request message from an IPMP Device which is requesting an IPMP tool identified by a certain tool ID;

checking the domain ID sent in the request message, also checking the availability of requested IPMP tool;

sending back a reply message, either positive or negative;

choosing to do a mutual authentication with the IPMP Device, using mutual authentication messages defined in MPEG IPMP, to verify whether the IPMP Device is a trusted IPMP device, if the reply is going to be positive; and

sending back the positive reply message containing the requested IPMP tool, wherein the reply message is carried as a payload as the secure message defined in MPEG IPMP to ensure its confidentiality, if the mutual authentication is successful.

6. A method of processing rights information carried in a certain position in MPEG IPMP system, wherein the rights information is constructed using a rights language, the rights information is carried in a certain place in the content, and the rights information is sent to an IPMP terminal which has rights management tool based on the rights language, the method comprising the steps of:

extracting the rights information from the place inside the content;

routing the extracted rights information to the rights management tool;

parsing the rights information, according to the rights language; and

controlling the content consumption with the management tool.

7. A method of processing rights information carried in a certain position in MPEG IPMP system, wherein the rights information is constructed using a rights language, the rights information is carried in the place in the content, indicating which rights management tool should handle the rights language by specifying tool ID in the information associated with the rights information, the method comprising the steps of:

extracting the rights information from the place inside the content, determining which rights management tool should handle this rights information by looking at the tool ID;

retrieving the rights management tool if it is not present in the terminal;

routing the rights information to the rights management tool;

parsing the rights information according to the rights language; and

controlling the content consumption with the management tool.

8. A method of processing rights information carried in a certain position in MPEG IPMP system, wherein the rights information is carried in a Rights ES (Elementary Stream) associated with a content, the rights information is constructed using a certain rights language, and the rights information is carried in the Rights ES in the content, the Rights ES is multiplexed together with other elementary streams, and sent to an MPEG IPMP terminal which has a rights management tool based on the rights language, the method comprising the steps of:

extracting the rights information from the Rights ES inside the content;

routing the rights information to the rights management tool;

parsing the rights information according to the rights language; and

controlling the content consumption with the management tool.

9. A method of processing rights information carried in a certain position in MPEG IPMP system, wherein the rights information is carried in a Rights ES associated with a content, the rights information is constructed using a rights language, and the rights information is carried in the place in the content, indicating which rights management tool should handle the rights language by specifying tool ID in the Decoder Specific Information associated with the Rights ESD (ES descriptor), the method comprising the steps of:

extracting the rights information from the Rights ES inside the content, determining which rights management tool should handle this rights information by looking at the tool ID in the Decoder Specific Information;

retrieving the rights management tool if it is not present in the terminal;

routing the rights information to the rights management tool;

parsing the rights information according to the rights language; and

controlling the content consumption.