Smart Card Consumption Time Reporting for Third-Party AM Servers
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Solution Overview
Problem
Conventional content transmission systems with embedded Audience Measurement (AM) functions in smart cards cannot report consumption time of services or content when the AM server is managed by a third operator, limiting user consumption pattern analysis and next-generation user-customized services.
Innovation Solution
A method and apparatus that enable reporting of consumption time by receiving an encryption key from a broadcasting server, generating consumption time information, and transmitting it to a smart card or AM server, allowing the smart card to interpret and report the consumption time to a broadcasting server or a third-party AM server.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the AM server is managed by a third operator, then the smart card cannot report consumption time of service or content, but if the AM server is managed by the same operator, then the consumption time can be estimated using decryption key request messages
Solution Approach 1:
The patent introduces an intermediary message structure that carries consumption time information from the terminal to the smart card, which then forwards it to the AM server. This intermediary mechanism enables communication between the terminal and third-party AM servers while maintaining the smart card's security architecture, resolving the incompatibility between third-party server management and consumption time reporting.
2Reliability
If the smart card stores decryption keys for service protection, then content decryption is enabled, but the consumption time cannot be directly measured
Solution Approach 1:
The patent implements a feedback mechanism where the terminal measures consumption time and sends it to the smart card via encrypted messages. The smart card then includes this consumption time information in the AM result report to the server, creating a feedback loop that enables consumption time measurement without compromising the service protection function.
3Measurement precision
If the terminal directly measures consumption time, then accurate measurement is achieved, but the smart card cannot report it when managed by third operator
Solution Approach 1:
The patent segments the consumption time reporting function into two parts: the terminal measures the consumption time accurately, and the smart card packages and transmits this information to the AM server. This segmentation allows the terminal to maintain measurement precision while the smart card gains the ability to report to any AM server, including third-party operators.
Data Source
AI summary
A method and apparatus for reporting a consumption time of a service or content in Audience Measurement (AM), which measures a user consumption pattern of the service or the content is provided. A method for reporting a consumption time of the service or the content in a terminal of a content transmission system includes receiving an encryption key for encrypting the service or the content from a broadcasting server and transmitting a message requesting interpretation of the encryption key to a smart card. The message includes consumption time information of the service or the content.