Network Coding Video Streaming in Information Centric Networks
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Solution Overview
Problem
In traditional host-centric networking paradigms, data transfer is inefficient due to session binding with a specific server, which is not suitable for mobile clients that experience disruptions and require seamless content delivery across different communication interfaces.
Innovation Solution
Implementing network coding in information-centric networks (ICNs) to break video data segments into chunks, encode them as linear combinations, and provide these encoded chunks over multiple communication interfaces, allowing clients to decode and reassemble the content seamlessly across varying network conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional host-centric networking with session binding to a specific server is used, then the server can maintain stable session state, but mobile clients experience disruptions and require session re-establishment when switching communication interfaces
Solution Approach 1:
The video data is segmented into multiple chunks, and network coding is applied to create encoded chunks that can be distributed across different communication interfaces. This segmentation allows the system to maintain session continuity while adapting to interface changes, as the encoded chunks can be reassembled from different sources without requiring session re-establishment.
Solution Approach 2:
Network coding acts as an intermediary mechanism between the server and mobile client. By encoding video chunks into linear combinations with embedded decoding information, the system enables seamless interface switching while maintaining data integrity and session continuity without direct server-client session binding.
2Device complexity
If video data is transmitted as original chunks without network coding, then the data structure is simple, but the client requires exact chunk matching and cannot seamlessly aggregate data from multiple interfaces
Solution Approach 1:
The patent transforms the data structure by applying network coding, which changes the parameters of data chunks from original sequential segments to linear combinations with embedded metadata. This transformation enables efficient data aggregation from multiple interfaces while maintaining manageable complexity through systematic encoding and decoding procedures.
Solution Approach 2:
Network encoded chunks are created as composite data structures that combine multiple original chunks into linear combinations. These composite chunks contain embedded decoding information that allows the client to efficiently reconstruct the original data from multiple sources, improving aggregation efficiency while maintaining structured organization.
3Productivity
If network coding is applied to encode video chunks as linear combinations, then data transfer efficiency and multi-interface aggregation improve, but the encoding and decoding processing complexity increases
Solution Approach 1:
Network coding is applied in advance at the server side to pre-encode video chunks into linear combinations with embedded decoding information. This preliminary action eliminates the need for complex real-time processing at the client side, as the decoding information is already embedded in the transmitted chunks, reducing client-side processing complexity while maintaining high data transfer efficiency.
4Ease of manufacture
If video segments are broken into fixed number of chunks, then the segmentation process is simple, but it cannot adapt to varying bit rates and quality requirements of different segments
Solution Approach 1:
The patent applies different segmentation strategies to different video segments based on their specific characteristics such as bit rate and quality requirements. High-bitrate segments may be divided into more chunks while low-bitrate segments use fewer chunks, allowing each segment to be optimized locally for its specific needs while maintaining overall system efficiency.
Data Source
AI summary
The disclosure relates to technology for network coding a video stream in an information centric network. A network node breaks a media segment (e.g., a video segment) into chunks. The chunks for one media segment are then encoded into network encoded chunks, each of which may be a linear combination of the chunks for that media segment. Thus, a number of network encoded chunks for a media segment are generated. These network encoded chunks may be provided to a client in response to a request for content in an information centric network (ICN). When the client receives enough network encoded chunks, the client decodes them to produce the original chunks for that media segment. The client may perform bit-rate adaptation based on the time it takes to receive a media segment. The client may view the communication interfaces as a logical communication link upon which to perform rate adaptation.