Source Identifier Verification for Satellite Signal Routing
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Solution Overview
Problem
Satellite broadcasting systems face challenges in reliably routing high definition television signals, often resulting in misrouting issues where one program is provided instead of another, due to the lack of effective source identifier verification before uplinking.
Innovation Solution
A method and apparatus that involve receiving signals, inserting a source identifier, encoding them into transport streams, routing through a local area network to a multiplexer, comparing the identifier to an expected source, and modulating the signal only if it matches, ensuring proper routing and preventing misrouting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If signal routing is performed without source identifier verification, then routing speed is improved, but reliability deteriorates due to misrouting
Solution Approach 1:
The source identifier is inserted into the signal stream in advance, before routing operations. This preliminary action enables subsequent verification of signal identity without adding complexity to the routing process itself, as the identification data is already embedded and ready for comparison
Solution Approach 2:
The system compares the inserted source identifier against expected source information and uses this feedback to determine whether to proceed with uplinking. This feedback mechanism ensures that only correctly routed signals are transmitted, preventing misrouting while maintaining a relatively simple routing architecture
2Reliability
If source identifier comparison is performed before uplinking, then routing accuracy is improved, but processing time increases
Solution Approach 1:
The source identifier insertion occurs in advance during signal processing, so that when routing decisions need to be made, the identification data is already available for immediate comparison, minimizing additional processing time
Solution Approach 2:
The system uses the source identifier that was originally inserted into the signal to verify its own routing correctness. This self-verification approach eliminates the need for external or complex verification mechanisms, reducing processing overhead while maintaining high routing accuracy
Data Source
AI summary
An apparatus for generating an output signal includes a receiving system 160 generating a plurality of signals having a first format, an insertion module 166 inserting a source identifier into the plurality of signals, an encoder 182 encoding the plurality of signals into a plurality of transport streams and a multiplexer 210. A local area network 130 routes the plurality of transport streams to the multiplexer 210 to form a combined signal. A processing system 200 compares the source identifier to an expected source. When the source identifier corresponds to the expected source, the processing system 200 modulates the combined signal to form a modulated signal. When the source identifier does not correspond to the expected source, the processing system 200 changes the combined signal. A modulator 214 modulates the combined signal to form a modulated signal. A system 202 forms the output signal from the modulated signal.