Broadcast Signal Transmission Using IP-PLP Mapping and FEC
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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 proposed solution involves generating Physical Layer Pipes (PLPs) that include IP streams with signaled IP-PLP mapping information, performing FEC encoding and bit interleaving, and modulating transmission frames for efficient broadcast signal transmission, allowing for flexible service component transmission and reception, and reducing data packet overhead by compressing headers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional RF frequencies are used for digital broadcast transmission, then existing frequency resources are utilized, but data transmission efficiency and network robustness are insufficient
Solution Approach 1:
The broadcast signal is divided into multiple Physical Layer Pipes (PLPs), each capable of carrying different types of data streams (IP-based or non-IP-based). This segmentation allows flexible allocation of resources and improves transmission efficiency by optimizing each PLP for its specific data type while maintaining overall system robustness through diversified transmission paths.
Solution Approach 2:
The system dynamically adapts the transmission parameters, including modulation schemes, coding rates, and PLP configurations, based on channel conditions and service requirements. This dynamic adjustment enables the system to optimize data transmission efficiency under varying conditions while maintaining network robustness through adaptive error correction and retransmission strategies.
2Productivity
If additional frequency allocation is provided for mobile broadcast signals, then transmission capacity increases, but frequency resources are consumed
Solution Approach 1:
The broadcast system is designed to support multiple service types (mobile broadcast, fixed broadcast, IP-based services) using the same frequency resources. By making the system universal and capable of handling diverse data types through PLP multiplexing, the transmission capacity is effectively increased without requiring additional frequency allocation.
Solution Approach 2:
The system changes transmission parameters such as modulation order, coding rate, and PLP configuration to adapt to different service requirements. This allows the same frequency resources to be efficiently utilized for various broadcast services, effectively increasing transmission capacity without consuming additional spectrum.
3Adaptability or versatility
If IP-based broadcast signals are transmitted, then modern networking capabilities are enabled, but data packet overhead increases
Solution Approach 1:
The system extracts and separates the IP header information from the data payload, allowing for selective processing and optimization. By taking out the overhead components, the system can apply efficient compression techniques specifically to the header portions while maintaining the full networking capabilities of IP-based transmission.
Solution Approach 2:
The system implements header compression mechanisms where redundant IP header information is identified, compressed, and transmitted in a reduced form. The receiving end recovers the complete header information from the compressed version, effectively reducing data packet overhead while preserving full IP networking functionality.
Data Source
AI summary
Disclosed is an apparatus for transmitting a broadcast signal, an apparatus for receiving a broadcast signal, and a method for transmitting/receiving a broadcast signal using an apparatus for transmitting/receiving broadcast signal. A method for transmitting a broadcast signal according to the present invention comprises the steps of: generating a first PLP which includes an IP stream having at least one service component; signaling IP-PLP mapping information for linking the IP stream and the PLP in binary form and generating a second PLP which includes the signaled binary information; performing FEC-encoding and bit-interleaving on the first and second PLPs; generating a transmission frame including the first and second bit-interleaved PLPs; and modulating the transmission frame and transmitting a broadcast signal including the modulated transmission frame, wherein the IP-PLP mapping information includes IP information for identifying the IP stream and PLP information for identifying the PLP.