Redundant Stream Alignment in IP Datacasting
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Solution Overview
Problem
Existing wireless transmission systems, such as DVB-H, face challenges in minimizing data loss due to signal interference and network errors, particularly in mobile devices where continuous circuitry usage for data multiplexing leads to battery drain and power consumption issues.
Innovation Solution
Implementing a method that allocates different portions of a time slice frame for primary and redundant encoded data streams, where the redundant data is encoded using methods like Reed-Solomon Forward Error Coding and Systematic Lossy Error Protection, allowing for lower quality but bandwidth-efficient transmission, and using time slicing to periodically activate and deactivate receiver circuitry, enabling efficient battery conservation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If time slicing is used to reduce power consumption by periodically deactivating receiver circuitry, then battery life is improved, but data loss risk increases due to signal interference and network errors during transmission gaps
Solution Approach 1:
The patent applies preliminary action by transmitting redundant encoded data in advance within the same time slice burst before the receiver goes into sleep mode. This ensures that backup data is available before potential transmission gaps occur, allowing the receiver to switch to redundant data if primary data is lost during subsequent transmission interruptions, thus resolving the contradiction between power savings and data reliability.
2Reliability
If redundant encoded data streams are transmitted to minimize data loss, then data integrity is improved, but bandwidth consumption increases
Solution Approach 1:
The patent applies local quality by transmitting redundant data only during active transmission periods when the receiver is awake and can process it, rather than continuously. The redundancy is locally optimized for specific time slices rather than being uniformly applied, reducing overall bandwidth consumption while maintaining data integrity during critical reception windows.
Solution Approach 2:
The patent uses periodic action by transmitting redundant encoded data in periodic bursts synchronized with the time slicing schedule. Instead of continuous redundant transmission, the system periodically sends primary and redundant data together during active windows, then allows both streams to pause during sleep periods, thereby reducing total bandwidth consumption while maintaining reliability.
3Reliability
If primary and redundant encoded data are transmitted in the same time slice burst, then data protection is improved, but transmission complexity increases
Solution Approach 1:
The patent applies merging by combining primary and redundant encoded data streams into a single unified transmission burst. Instead of sending them separately in different time slices or frequencies, both data streams are merged into one consolidated transmission, simplifying the transmission architecture while ensuring both streams arrive together for effective redundancy protection.
Data Source
AI summary
A real-time program transmission system and method may receive a signal from a content source, and generate two different data streams. One stream may be of a higher quality than the other. The two streams may then be inserted into time slice frames, such that a single frame carries two portions of data: one corresponding to a first time segment in the program, and a second corresponding to a different time segment in the program. A receiving mobile terminal may buffer the received data, and may use the lower quality data as a backup in the event of a transmission error in the higher quality data.