Satellite Receiver Proximity Verification via LNB Control Signaling
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Solution Overview
Problem
Current satellite TV distribution systems face challenges in ensuring that secondary receivers are within the same household as the primary receiver for conditional access content, as existing proximity control methods are not foolproof and often require complex tracking or additional connectivity, leading to potential unauthorized sharing of smartcards and receivers.
Innovation Solution
The system employs the low-noise block down-converter to send authorization messages between primary and secondary receivers via the same coaxial cable by switching between predetermined transponders, allowing only authorized secondary receivers to access content when physically proximate to the primary receiver.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If proximity control systems are implemented using timer reset mechanisms or round-trip algorithms, then unauthorized sharing is discouraged, but the system complexity increases and reliability decreases
Solution Approach 1:
The patent introduces an intermediary authorization message transmitted through the satellite signal distribution system. The primary receiver sends an authorization message containing a unique identifier and timestamp via the satellite signal, which the secondary receiver must receive and verify to prove proximity. This intermediary message serves as a reliable proof of proximity without requiring complex tracking infrastructure or additional connectivity between receivers.
Solution Approach 2:
The system enables receivers to self-verify proximity through the authorization message mechanism. The secondary receiver autonomously receives the authorization message from the primary receiver via satellite signal, extracts the unique identifier and timestamp, and verifies proximity based on this information without requiring external verification infrastructure. This self-service approach reduces system complexity while maintaining reliability.
2Measurement precision
If additional connectivity infrastructure is added for proximity verification, then proximity control accuracy improves, but cost and system complexity increase
Solution Approach 1:
The patent utilizes the existing satellite signal distribution infrastructure for a dual purpose: delivering content signals and transmitting proximity verification authorization messages. The same satellite transponders and signal distribution paths used for content delivery are also used to carry the authorization messages from the primary receiver to the secondary receiver. This multi-functional use of existing infrastructure achieves accurate proximity verification without adding new connectivity infrastructure.
Solution Approach 2:
The system uses the existing satellite signal distribution path as a copy mechanism for transmitting authorization information. Instead of creating a separate dedicated communication channel between receivers, the authorization message is copied into the existing satellite signal stream and transmitted through the same infrastructure used for content delivery. This approach maintains verification accuracy while avoiding additional infrastructure costs.
3Device complexity
If existing satellite signal distribution infrastructure is utilized for authorization message transmission, then system complexity is reduced, but signal interference may occur
Solution Approach 1:
The patent segments the satellite signal spectrum by using different frequency bands or time slots for content transmission and authorization message transmission. The authorization messages are embedded in specific portions of the satellite signal stream, separated from the main content signals. This segmentation allows both content delivery and proximity verification to occur simultaneously over the same infrastructure without causing harmful interference, as the signals occupy different spectral or temporal resources.
Data Source
AI summary
The present invention relates to a system and a device for providing proximity control in a satellite television media content distribution system comprising at least a primary receiver and a secondary receiver, whereby authorization to access the conditional access media content is given if the primary and secondary receivers are verified to be within a single household. The invention uses LNB control signaling, by the primary receiver, to cause the LNB to down-convert signals from pre-determined transponders onto a pre-determined frequency in the L-Band such that the secondary receiver may receive messages thus created through the primary receiver's controlling of the LNB.