Physical Layer Zone Multiplexing for Adaptive Broadcast Data Streams
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Solution Overview
Problem
Unidirectional broadcast systems, such as DVB-T2, face limitations in adapting to varying user reception conditions and receiver capabilities, leading to a compromised trade-off between efficiency and robustness, as they lack dynamic adaptation and uniform physical layer configurations for all users.
Innovation Solution
The method involves dividing a data frame into multiple physical layer zones with different configuration characteristics, allowing for efficient multiplexing of data streams and signaling information, enabling receivers to select appropriate zones based on their conditions and capabilities, thereby optimizing efficiency and robustness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a uniform physical layer configuration is used for all users in broadcast systems, then system complexity is reduced and ease of operation is improved, but adaptability to varying reception conditions deteriorates and efficiency is compromised
Solution Approach 1:
The broadcast signal is segmented into multiple physical layer pipes (PLPs), each with different physical layer configuration characteristics such as modulation schemes, coding rates, and guard intervals. This allows the system to provide multiple configuration types within a single broadcast signal, enabling receivers to select the most appropriate PLP for their current reception conditions while maintaining a unified broadcast transmission framework.
2Adaptability or versatility
If adaptive modulation and coding is employed to optimize efficiency for each user, then adaptability to reception conditions is improved, but device complexity increases due to the need for reverse links and dynamic configuration
Solution Approach 1:
The system enables receivers to autonomously select the most appropriate physical layer pipe based on their own reception conditions and capabilities without requiring complex reverse link communication for configuration feedback. The broadcast signal itself contains multiple PLPs with different characteristics, allowing receivers to self-adapt by selecting the suitable PLP, thereby achieving adaptive modulation and coding effects without the complexity of bidirectional adaptive configuration.
3Adaptability or versatility
If multiple physical layer configurations are provided for different users, then adaptability to reception conditions is improved, but loss of information increases due to the need for extensive signaling information
Solution Approach 1:
Multiple physical layer pipes with different configuration characteristics are merged into a single broadcast signal transmission. The signaling information for multiple PLPs is efficiently organized and transmitted within the same signal framework, reducing the overall information overhead compared to transmitting separate signals for each configuration type. This merging approach allows the system to provide multiple configuration options while minimizing the additional signaling burden.
Data Source
AI summary
A method and apparatus for transmitting data comprising a plurality of data streams in a broadcasting system are provided. The method includes dividing a frame into a plurality of physical layer zones; allocating the plurality of data streams to at least one of the plurality of physical layer zones; allocating signaling information associated with the plurality of physical layers to at least one of the plurality of physical layer zones; and transmitting the frame to which the signaling information is allocated.