Link Layer Packet Header Design for Multimedia Signal Transmission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current multimedia systems face challenges in efficiently transmitting and receiving various types of services using link layer protocols, particularly in optimizing the link layer protocol for broadcast networks, which affects the transmission of multimedia data and signaling information.
Innovation Solution
The proposed solution involves an apparatus and method for transmitting and receiving signals in a multimedia system that supports a link layer protocol, specifically by generating and processing link layer packets, including advanced television systems committee (ATSC) link-layer protocol packets, to effectively manage sub-streams and services across different communication systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If link layer protocol is optimized for broadcast network characteristics, then data processing efficiency is improved, but device complexity increases
Solution Approach 1:
The patent segments the transmission system into distinct layers (physical layer, link layer, network layer) with clearly defined functions. The link layer is further divided into sub-layer 1 and sub-layer 2, each handling specific tasks such as packetization, multiplexing, and filtering. This segmentation allows optimization of data processing efficiency at each layer without overwhelming complexity, as each sub-layer focuses on specific functions rather than handling all processing tasks monolithically.
2Adaptability or versatility
If various receiving schemes are supported, then adaptability is improved, but device complexity increases
Solution Approach 1:
The patent implements a universal link layer protocol structure that can handle multiple receiving schemes (broadcast, unicast, multicast) through a common framework. The link layer packet format is designed to be flexible, accommodating different service types and transmission modes without requiring separate protocol stacks. This multi-functionality approach allows the system to support various receiving schemes while avoiding the complexity of implementing multiple independent protocol systems.
3Productivity
If link layer packet filtering is implemented, then data processing efficiency is improved, but measurement precision requirements increase
Solution Approach 1:
The patent applies preliminary filtering actions at the link layer by examining packet headers and identification fields before packets are passed to upper layers. The link layer protocol includes specific fields for packet identification, service type indication, and filtering control. This preliminary filtering based on readily available header information improves data processing efficiency without requiring complex analysis, as the filtering decisions are made using pre-positioned identification markers in the packet structure.
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
A transmitting apparatus and an operating method for the apparatus in a multimedia system are provided. The operating method includes inputting at least one network layer packet, generating a link layer packet based on the at least one network layer packet, and transmitting the link layer packet. The link layer packet includes a header including information indicating a packet type of the at least one network layer packet, information indicating whether the link layer packet includes a single network layer packet, and information indicating an identifier related to the at least one network layer packet.