Unified Link Layer Packet Structure for Hybrid Broadcast Interoperability
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Solution Overview
Problem
Next generation broadcast systems require a method to process link layer packets irrespective of packet types from higher layers and reduce overhead during higher layer packet transmission, while supporting both IP and MPEG-2 TS schemes simultaneously.
Innovation Solution
A method and apparatus for transmitting and receiving broadcast signals that encapsulate IP and MPEG-2 TS packets in a unified manner, using a link layer packet structure that can process packets from upper layers and reduce transmission overhead by employing a hybrid broadcast system capable of interoperating with both IP and MPEG-2 TS protocols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate processing methods are used for IP packets and MPEG-2 TS packets at the link layer, then each packet type can be handled according to its specific requirements, but the device complexity increases and processing efficiency decreases
Solution Approach 1:
The patent creates a universal link layer packet structure that can accommodate both IP packets and MPEG-2 TS packets through a unified encapsulation format. The link layer processing unit handles both packet types using the same processing logic, eliminating the need for separate processing paths while maintaining reliability through standardized handling procedures
Solution Approach 2:
The patent introduces an intermediary link layer packet structure that mediates between the higher layer (IP/MPEG-2 TS packets) and the physical layer. This intermediary structure provides a common interface and processing mechanism, allowing diverse packet types to be handled uniformly without increasing device complexity
2Loss of information
If complete higher layer packet information is transmitted without optimization, then all necessary information is available for processing, but transmission overhead increases
Solution Approach 1:
The patent extracts and separates essential packet information from the complete higher layer packets during the encapsulation process. By identifying and extracting only the necessary information elements required for link layer processing, the system reduces transmission overhead while ensuring all critical data is preserved for proper packet handling
Solution Approach 2:
The patent segments the higher layer packet information into essential and non-essential components. The link layer packet structure includes only the segmented essential information required for processing, thereby reducing overall transmission overhead while maintaining information completeness for functional operations
3Device complexity
If a unified link layer packet structure is implemented for both IP and MPEG-2 TS packets, then device complexity is reduced and processing is simplified, but the adaptability to handle packet-specific requirements may be compromised
Solution Approach 1:
The patent implements a dynamic link layer packet structure that can adapt its content based on the type of higher layer packet being encapsulated. The structure includes flexible fields that can be configured differently for IP packets versus MPEG-2 TS packets, allowing the system to maintain low complexity through a unified processing path while preserving adaptability through configurable packet-specific parameters
Data Source
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AI summary
An apparatus for transmitting broadcast signals, an apparatus for receiving broadcast signals, a method for transmitting broadcast signals, and a method for receiving broadcast signals are disclosed. A method for transmitting a broadcast signal includes: generating a first packet including broadcast content data; generating a second packet including the first packet, wherein the second packet includes a fixed header, an extended header having a variable length, and a payload including the first packet, wherein the fixed header includes a packet type element for identifying a category of the first packet and an indicator part element for identifying a construction of the payload; generating a broadcast signal including the second packet; and transmitting the broadcast signal.