Multicast and Unicast Data Transmission for Personalized Broadcast
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Solution Overview
Problem
Existing communication technologies face challenges in efficiently transmitting common and differential data in one-to-many scenarios, particularly in intelligent cockpit systems, where resource overheads and packet loss issues hinder high-quality data transmission.
Innovation Solution
A data transmission method utilizing a multicast channel for common data and unicast channels for differential data, with retransmission data sent over existing unicast channels, and using identifiers to differentiate between common and differential data packets, along with storage management to reduce resource overheads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If unicast channels are used for all data transmission in one-to-many scenarios, then each receiving device can receive personalized differential data, but resource overheads increase significantly due to multiple separate transmission channels
Solution Approach 1:
The patent segments data into two types: common data transmitted via multicast channel and differential data transmitted via unicast channels. This segmentation allows the system to use the most efficient transmission method for each data type, reducing overall resource overhead while maintaining personalized transmission capability for differential data.
Solution Approach 2:
The unicast channels serve multiple functions: transmitting differential data to specific receiving devices and retransmitting lost common data packets. This multi-functionality reduces the need for separate dedicated retransmission channels, thereby reducing resource overhead.
2Productivity
If multicast channel is used for common data transmission, then transmission efficiency improves and resource overheads reduce, but packet loss occurs affecting data reliability
Solution Approach 1:
The patent implements a feedback mechanism where receiving devices monitor common data packets received via multicast channel and send feedback information to the sending device. When packet loss is detected, the receiving device requests retransmission through the unicast channel, ensuring reliable data delivery while maintaining high transmission efficiency.
Solution Approach 2:
The unicast channel acts as an intermediary for retransmitting lost common data packets. Instead of relying solely on the multicast channel for all transmissions, the system uses unicast channels as a backup mechanism to ensure reliable delivery when multicast packets are lost.
3Reliability
If separate unicast channels are established for retransmission, then data reliability improves, but resource overheads increase due to additional channel establishment
Solution Approach 1:
The patent makes unicast channels multi-functional by using them for both differential data transmission and common data retransmission. This eliminates the need for separate dedicated retransmission channels, reducing resource overhead while maintaining transmission reliability.
Solution Approach 2:
The system dynamically changes the function of unicast channels based on transmission needs. The same unicast channel infrastructure is utilized for multiple purposes (differential data and retransmission), effectively changing its operational parameters to reduce resource consumption.
Data Source
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AI summary
This application discloses a data transmission method, apparatus, device, and system, and a storage medium, and relates to the field of communication technologies. An example in which a first device performs the method is used. The first device sends common data to a plurality of second devices through one multicast channel, where the common data is same data; and separately sends corresponding differential data to the plurality of second devices through a plurality of unicast channels, where the respective differential data of the plurality of second devices is different. In the method, one-to-many transmission of common data is implemented through the one multicast channel, so that transmission efficiency of the common data is improved, and resource overheads for transmitting the common data are low; and one-to-many transmission of differential data is implemented through the plurality of unicast channels, so that data types for one-to-many data transmission are richer. In addition, different second devices can perform different personalized operations based on the differential data. Therefore, the method can better meet requirements of diversified one-to-many data transmission scenarios.