PLP-Based Broadcast Reception for Shared-Frequency Mobile Services
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Solution Overview
Problem
Current digital broadcast systems face challenges in efficiently transmitting high-capacity data, ensuring robustness, and flexibility, especially in mobile reception environments, as they require additional frequency allocation and struggle to distinguish and decode service components effectively.
Innovation Solution
A broadcast signal transmitting apparatus and method that utilize RF signals within conventional broadcasting systems to transmit additional and mobile broadcast signals without additional frequency, by generating PLPs for each service component, using preamble signals for demodulation, and employing LDPC coding and MIMO systems for error correction and enhanced data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If additional frequency allocation is used to transmit mobile broadcast signals, then transmission capacity is improved, but frequency resource utilization deteriorates
Solution Approach 1:
The patent merges mobile broadcast signals with conventional terrestrial broadcast signals by mapping both services onto the same frequency band. Multiple PLPs (Physical Layer Pipes) are multiplexed in the time-frequency domain, allowing mobile and terrestrial signals to share the same RF resources without requiring additional frequency allocation.
Solution Approach 2:
The broadcasting system is designed with multi-functionality to serve both terrestrial and mobile reception modes using the same frequency band. The system can dynamically allocate PLPs to different service types (terrestrial or mobile) based on receiver characteristics and service requirements, making the frequency resources universally applicable to multiple broadcast services.
2Productivity
If PLPs are mapped with service components using program map table, then data transmission efficiency is improved, but difficulty in distinguishing and decoding service components increases
Solution Approach 1:
The patent segments service components into distinct PLPs (Physical Layer Pipes), where each PLP carries specific service data. The program map table is enhanced to include PLP-specific identification information, allowing receivers to efficiently identify and decode only the PLPs relevant to their service requirements, reducing processing complexity while maintaining high transmission efficiency.
Solution Approach 2:
The enhanced program map table acts as an intermediary that bridges the gap between multiplexed PLPs and service components. It contains identification information that enables receivers to map PLPs to specific service components without requiring complex analysis of the multiplexed signal structure, thereby simplifying the decoding process.
3Adaptability or versatility
If conventional broadcasting system RF signals are used to transmit mobile broadcast signals, then frequency resource utilization is improved, but robustness of transmission and reception network deteriorates
Solution Approach 1:
The patent applies local quality by configuring different PLPs with specific parameters optimized for their intended reception mode. Mobile-oriented PLPs use modulation and coding schemes suitable for mobile environments (higher robustness), while terrestrial PLPs use schemes optimized for fixed reception (higher efficiency). This allows the system to maintain high frequency utilization while ensuring each service component has appropriate transmission characteristics.
Data Source
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AI summary
Disclosed is a broadcasting signal transmission device, a broadcasting signal reception device, and a method for transmitting/receiving a broadcasting signal using same. The method for receiving the broadcasting signal comprises the following steps: receiving the broadcasting signal, which includes a transmission frame, wherein the transmission frame includes a plurality of PLPs, which transmit components that constitute a broadcasting service, first signaling information and second signaling information, which include the signaling information of the plurality of PLPs, a first preamble signal, which has been signaled with a preamble format, and a second preamble signal, which has been signaled with pilot pattern information, wherein one of the plurality of PLPs is a base PLP, which includes a program number that corresponds to the broadcasting service and program map table information, which has been signaled with identifying information for each of the PLPs; demodulating the broadcasting signal based on the first and the second preamble signals; FEC decoding the demodulated broadcasting signal; and identifying a PLP group that includes the plurality of PLP from the FEC decoded broadcasting signal based on the first and the second signaling information, decoding at least one PLP of the identified PLP group, and providing the broadcasting service.