Broadcast Channel Tuning with Cached Parameters During Control Failures
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Solution Overview
Problem
Subscriber devices face issues in accessing broadcast channels due to failures in the broadcast control component or network connections, leading to a loss of broadcast tuning parameters.
Innovation Solution
Utilizing switched digital video tuning parameters to include broadcast tuning parameters in management messages, allowing subscriber devices to retrieve and use these parameters from a switched digital video cache when issues arise with the broadcast control component.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the CPE retrieves broadcast tuning parameters via the broadcast control component, then the CPE can receive broadcast channels, but the service is vulnerable to failures at the broadcast control component or network connections
Solution Approach 1:
The patent stores broadcast tuning parameters in advance within the CPE device itself, rather than retrieving them in real-time from the broadcast control component. This preliminary caching of essential parameters enables the CPE to independently tune to broadcast channels even when the broadcast control component or network connection fails, thereby improving service reliability without significantly increasing system complexity
Solution Approach 2:
The patent introduces a local cache or storage mechanism within the CPE as an intermediary between the broadcast control component and the tuning function. This intermediary stores critical tuning parameters locally, allowing the CPE to bypass the broadcast control component when necessary, thus reducing vulnerability to failures at that component while maintaining the ability to receive broadcast channels
2Reliability
If the CPE stores broadcast tuning parameters locally, then the CPE can access channels during failures, but the parameters may become outdated
Solution Approach 1:
The patent implements a periodic update mechanism where the CPE regularly refreshes its locally stored broadcast tuning parameters from the broadcast control component when available. This periodic synchronization ensures that the cached parameters remain current while still providing the benefit of local storage for failover scenarios, thus balancing access availability with parameter currency
Solution Approach 2:
The patent incorporates a feedback mechanism that monitors the status of the broadcast control component and network connection. When the component or connection is available, the CPE updates its local parameters; when unavailable, it continues using cached parameters. This feedback-driven approach ensures parameters are updated when possible while maintaining service continuity, addressing both the need for local access and parameter freshness
Data Source
AI summary
In some embodiments, a method detects an issue with broadcast tuning parameters for broadcast channels being broadcast by a broadcast system. A message is received including a set of switched digital video tuning parameters for switched digital video channels from a switched digital video system where the broadcast tuning parameters are included in the message. The method retrieves at least a portion of the broadcast tuning parameters that are received via the switched digital video system and uses the at least a portion of the broadcast tuning parameters received in the message to request a broadcast channel from the broadcast system.