Service Guide Bootstrap in DVB-NGH Systems
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Solution Overview
Problem
In wireless communications systems like Digital Video Broadcasting-Handheld (DVB-H), the use of Program Specific Information (PSI) or Service Information (SI) signaling for discovering service guide components is inefficient, requiring significant bandwidth and leading to sub-optimal user experiences due to increased costs and decreased system efficiency.
Innovation Solution
The solution involves transmitting service guide information, including entry point information, in a dedicated physical channel, with the service guide bootstrap session, announcement session, and delivery session received in either a single or dedicated group of physical channels, optimizing the protocol stack to include layer 2 and upper layer signaling within the service guide, reducing the need for extensive PSI/SI searching across multiple data streams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If PSI or SI signaling is used to discover service guide components in DVB-H systems, then service guide information can be transmitted, but bandwidth requirements increase significantly and system efficiency decreases
Solution Approach 1:
The patent extracts the service guide bootstrap session from the general transport stream and places it in a dedicated physical channel. This separation allows the service guide information to be transmitted efficiently without requiring extensive PSI/SI signaling across multiple data streams, directly reducing bandwidth consumption while maintaining complete service guide information delivery
Solution Approach 2:
The patent segments the service guide delivery into distinct components: a bootstrap session in a dedicated physical channel for initial service guide information, and optional announcement/delivery sessions for additional information. This segmentation allows receivers to obtain essential service guide data with minimal bandwidth, only accessing additional sessions if needed
2Ease of operation
If PSI or SI signaling is used for service guide discovery, then service components can be mapped, but the process becomes complex and inefficient across multiple data streams
Solution Approach 1:
The patent performs preliminary action by providing all necessary service guide information, including component mapping data, in the bootstrap session before the receiver needs to access actual service components. This eliminates the need for receivers to perform complex PSI/SI signaling and searching across multiple data streams, simplifying the overall operation while reducing protocol complexity
3Loss of information
If extensive PSI/SI signaling is used, then complete service guide information can be provided, but system efficiency decreases and costs increase
Solution Approach 1:
The dedicated physical channel for the bootstrap session provides service guide information autonomously without requiring receivers to actively search through multiple data streams using PSI/SI signaling. The system self-serves by pre-positioning all necessary mapping information in the dedicated channel, improving system efficiency while maintaining complete information availability
Data Source
AI summary
Apparatuses may perform and methods may include receiving a digital broadcast signal that includes a physical layer pipe identified by a predetermined identifier indicating that the physical layer pipe includes service guide bootstrap information. The bootstrap information may identify one or more service guides available for download. The physical layer pipe may include header information that identifies one or more other physical layer pipes containing portions of the service guides identified in the bootstrap information. Based on the bootstrap information and header information, a selected service guide is retrieved and presented to a user.