Link Layer Packet Structure for Broadcast Signaling
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Solution Overview
Problem
Next generation broadcast systems require a structure for link layer packets that can process packets of various types irrespective of packet types received from a higher layer, and an effective method for transmitting signaling information using these packets.
Innovation Solution
A link layer packet structure is developed with a fixed header and payload, where the payload contains signaling information about broadcast programs and reception data, and the fixed header includes a packet type element and signaling type element to identify the data format, allowing for efficient transmission and reception of signaling information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a unified link layer packet structure is designed to process various packet types from higher layers, then the adaptability and versatility of the system is improved, but the device complexity increases due to the need to handle multiple packet formats and signaling types
Solution Approach 1:
The link layer packet structure is designed with a universal fixed header that can accommodate multiple packet types from higher layers (IP packets, MPEG-2 TS packets, etc.). The header includes type identification fields that enable a single packet structure to handle diverse data formats, achieving multi-functionality without requiring separate processing structures for each packet type.
Solution Approach 2:
The packet structure is segmented into a fixed header portion and a payload portion. The fixed header contains standardized fields for type identification (packet type element, signaling type element), while the payload area accommodates variable content. This segmentation allows the system to process different packet types through a unified framework by interpreting header information.
2Productivity
If signaling information is transmitted using the link layer packet with fixed header and payload, then the transmission efficiency is improved, but the loss of information increases due to the need for additional header elements and formatting requirements
Solution Approach 1:
The signaling information transmission is merged with the existing link layer packet structure. Rather than creating separate signaling channels or protocols, the invention combines signaling data with regular broadcast content in a unified packet format. The fixed header elements (packet type, signaling type) are integrated into the packet structure, eliminating the need for duplicate signaling mechanisms.
3Ease of operation
If the fixed header includes packet type element and signaling type element for identifying data format, then the ease of operation is improved for packet processing, but the device complexity increases due to additional header fields and parsing requirements
Solution Approach 1:
The packet type element and signaling type element are placed in the fixed header at the beginning of the packet structure. This preliminary identification allows receiving devices to quickly determine the packet format and appropriate processing method before diving into the payload content. The type identification fields are prepared in advance, enabling efficient routing and processing decisions.
Data Source
AI summary
A method for transmitting signaling information includes: generating a link layer packet including signaling information; and transmitting the generated link layer packet. The link layer packet includes a fixed header and a payload. The signaling information includes information regarding a broadcast program and data and information needed for reception of the broadcast program and data, and the signaling information is contained in the payload of the link layer packet. The fixed header includes a packet type element for identifying a category of data contained in the payload of the link layer packet and a signaling type element for identifying a format of the signaling information contained in the payload of the link layer packet.