Broadcast Signal Reception Device with Dynamic PLP Configuration
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Solution Overview
Problem
Digital broadcast systems face challenges in data transmission efficiency, network robustness, and flexibility, particularly in mobile reception environments, due to the large amounts of data and varying service requirements.
Innovation Solution
A broadcast signal reception method involving orthogonal frequency-division multiplexing (OFDM), convolutional deinterleaving, block deinterleaving, cell deinterleaving, and decoding, along with the use of Multiple-Input Multiple-Output (MIMO) systems to enhance data processing and transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If digital broadcast signals transmit large amounts of video/audio data and additional services, then service functionality is improved, but data transmission efficiency deteriorates
Solution Approach 1:
The patent segments broadcast data into multiple PLPs (Physical Layer Pipes) with different characteristics, allowing efficient transmission of diverse service types. Each PLP can be optimized for specific service requirements while maintaining overall transmission efficiency through selective resource allocation.
Solution Approach 2:
The system dynamically adjusts transmission parameters including modulation schemes, code rates, and PLP configurations based on channel conditions and service requirements. This dynamic adaptation enables efficient resource utilization while supporting varying service functionalities.
2Reliability
If network robustness is improved for reliable reception, then transmission reliability is improved, but network flexibility deteriorates
Solution Approach 1:
Different PLPs are configured with different robustness levels (modulation schemes, code rates, interleaving depths) matched to specific service requirements. Critical services receive higher robustness while less critical services use more efficient but less robust configurations, achieving both reliability and flexibility.
Solution Approach 2:
The system changes transmission parameters (modulation order, code rate, PLP ID, frequency position) to create diverse virtual channels from a single physical channel. This parameter variation provides both robustness through redundancy and flexibility through configurable service differentiation.
3Adaptability or versatility
If network flexibility is improved for mobile reception equipment, then adaptability is improved, but data transmission efficiency deteriorates
Solution Approach 1:
The patent introduces a new dimension of service differentiation through PLP configuration, adding adaptability for mobile reception without sacrificing overall transmission efficiency. Multiple PLPs with different characteristics allow selective optimization for mobile devices while maintaining efficient transmission for other services.
Data Source
AI summary
A broadcast signal reception method, according to one embodiment of the present invention, may include receiving the broadcast signal including broadcast data and physical layer signaling information, where the physical layer signaling information includes frequency interleaver information for indicating whether a frequency interleaver is applied to the broadcast data, performing frequency deinterleaving on the broadcast data selectively based on the frequency interleaver information, convolutionally deinterleaving the broadcast data, block deinterleaving the convolutionally deinterleaved broadcast data, and cell deinterleaving the block deinterleaved broadcast data using a memory, where the cell deinterleaving includes random writing the block deinterleaved broadcast data into the memory and linear reading the block deinterleaved broadcast data from the memory, and the random writing is performed based on a permutation sequence and the permutation sequence varies for every FEC block.