IP Header Compression in Broadcast Signal Transmission
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Solution Overview
Problem
Current digital broadcast systems face challenges in efficiently transmitting and receiving high-capacity data with robustness and flexibility, especially in mobile environments, and require enhanced data transmission efficiency and error-free reception without additional frequency allocation.
Innovation Solution
A broadcast signal transmitting and receiving apparatus that compresses IP packet headers, separates static and dynamic information, and uses PLPs to transmit signaling information efficiently, allowing for flexible service component transmission and reception, and employs MIMO systems for enhanced data transmission efficiency and robustness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If digital broadcast signals include high capacity video/audio data and additional data, then data transmission capacity is improved, but data transmission efficiency and network robustness deteriorate
Solution Approach 1:
The patent segments broadcast data into multiple PLPs (Physical Layer Pipes) with different characteristics. Each PLP can be independently configured with specific FEC rates, modulation schemes, and transmission parameters, allowing efficient transmission of high-capacity data while maintaining overall system efficiency and robustness through differentiated handling of different data types.
2Quantity of substance
If digital broadcast signals include high capacity video/audio data and additional data, then data transmission capacity is improved, but network robustness deteriorates
Solution Approach 1:
The patent applies local quality by assigning different FEC rates, modulation schemes, and transmission parameters to different PLPs based on their specific requirements. Critical data can be transmitted through more robust PLPs with higher FEC rates, while less critical data uses PLPs with lower overhead, thereby maintaining network robustness while enabling high-capacity transmission.
3Quantity of substance
If digital broadcast signals include high capacity video/audio data and additional data, then data transmission capacity is improved, but flexibility in network for mobile receiving equipments deteriorates
Solution Approach 1:
The patent enables dynamic adaptation to mobile receiving environments by allowing receivers to selectively decode PLPs based on their current reception conditions, device capabilities, and service requirements. The system can dynamically adjust which PLPs are decoded and how they are processed, providing flexibility for mobile devices with varying antenna configurations, processing powers, and operational conditions.
4Loss of substance
If IP packet headers are compressed by separating static and dynamic information, then data packet overhead is reduced, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-processing IP packet headers to separate static information (which remains constant across multiple packets) from dynamic information (which changes per packet). The static portion is compressed once and stored, while only the dynamic portion needs to be transmitted with each packet, significantly reducing overhead. The receiver performs corresponding preliminary decomposition to reconstruct the full headers.
Data Source
AI summary
Disclosed are a broadcast signal transmitting apparatus, a broadcast signal receiving apparatus, and a broadcast signal transceiving method in the broadcast signal transmitting and receiving apparatuses. The broadcast signal transmitting method comprises the steps of: compressing headers of data packets which are included in an Internet protocol (IP) stream identified by access information, wherein the compressed data packets include a first packet containing both static information and dynamic information in the header thereof, and a second packet containing dynamic information in the header thereof; splitting the static information from the header of the first packet and diverting the remaining part thereof into the second packet; outputting an IP stream, which includes the second packet, via a data physical layer pipe (PLP); outputting, via a common PLP, a common stream, which includes the static information of the header of the first packet split in the previous step, compression information and IP-PLP mapping information for linking the IP stream and the data PLP; generating a signal frame on the basis of the data from the data PLP and the data of the common PLP; and transmitting a broadcast signal which includes the signal frame.