Broadcast Signal Transceiver PLP Segmentation
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Solution Overview
Problem
Current digital broadcast systems face challenges in efficiently transmitting and receiving high-capacity data, particularly in mobile environments, due to limitations in data transmission efficiency, network robustness, and flexibility, especially when using conventional RF frequencies without additional frequency allocation.
Innovation Solution
The solution involves encoding Physical Layer Pipes (PLP) data with signaling information, generating a transmission frame that includes multiple Link Layer Pipes (LLPs), and using a MIMO system to enhance data transmission efficiency and robustness, allowing for flexible service component transmission and reception, including SVC-related information, to accommodate varying receiver capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional RF frequencies are used for digital broadcast transmission, then compatibility with existing broadcasting systems is maintained, but data transmission efficiency and network robustness are insufficient
Solution Approach 1:
The transmission system is segmented into multiple PLPs (Physical Layer Pipes) that can be independently configured and transmitted. Each PLP can carry different types of data with different reliability requirements, allowing efficient utilization of the available RF spectrum while maintaining compatibility with conventional broadcasting systems.
Solution Approach 2:
The system dynamically adapts transmission parameters such as modulation schemes, coding rates, and PLP configurations based on channel conditions and service requirements. This dynamic adaptation enables the system to achieve high data transmission efficiency while maintaining robustness in mobile environments using conventional RF frequencies.
2Reliability
If additional frequency allocation is provided for mobile broadcast signals, then data transmission efficiency and network robustness are improved, but frequency resource consumption increases
Solution Approach 1:
The conventional RF broadcasting system is designed to serve multiple functions simultaneously - traditional broadcast services and mobile broadcast services - using the same frequency resources. Through PLP-based multiplexing and adaptive transmission, the system achieves both high reliability for mobile reception and efficient use of existing frequency allocations without requiring additional spectrum.
3Adaptability or versatility
If PLP data is encoded with signaling information and transmitted through multiple LLPs, then service component transmission flexibility is improved, but frame structure complexity increases
Solution Approach 1:
The frame structure is segmented into multiple PLPs that are further divided into LLPs (Link Layer Pipes). This segmentation allows flexible allocation of service components to different pipes with appropriate encoding and signaling, while the modular structure helps manage complexity through standardized interfaces and hierarchical organization.
Solution Approach 2:
Signaling information acts as an intermediary that carries metadata about the encoded PLP data, including identifiers and configuration parameters. This signaling layer enables flexible service component transmission by providing the receiver with necessary information to correctly interpret and process the segmented data streams without requiring complex direct control mechanisms.
Data Source
AI summary
A broadcast signal receiver according to the present invention comprises: a demodulator for performing OFDM demodulation on a received broadcast signal including a frame for the delivery of a broadcast service: a frame demapper for outputting the frame, the frame including a preamble that contains first signaling information, and a plurality of link-layer-pipes (LLPs) that contain PLP data, second signaling information and third signaling information, with the PLP data including a base layer and an enhancement layer of the broadcast service; and a decoder for decoding the first signaling information, for decoding the second and third signaling information, and for selectively decoding the PLP data by using the third signaling information.