Sidelink Duplicate Data Transmission for V2X Reliability
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Solution Overview
Problem
The reliability of data transmission over sidelinks in V2X communication is low due to rapidly changing channel characteristics and the lack of a feedback mechanism, posing a challenge in ensuring reliable communication.
Innovation Solution
A data transmission method where duplicate data is sent over two logical channels using different carrier frequencies, enhancing reliability by ensuring the same data is received by the receiving device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If duplicate data transmission is implemented over sidelink, then data transmission reliability is improved, but device complexity increases
Solution Approach 1:
The patent applies the copying principle by creating duplicate copies of the same data packet and transmitting them through two different logical channels with distinct carrier frequencies. This ensures that if one transmission path fails due to rapidly changing channel characteristics, the receiving device can still successfully receive the data through the alternative path, thereby improving reliability without requiring complex error correction mechanisms
Solution Approach 2:
The patent segments the data transmission into multiple independent paths by dividing the single data stream into two duplicate streams that are transmitted separately through different logical channels. This segmentation allows each transmission path to be independently managed and received, reducing the complexity of managing a single high-reliability path while achieving the same reliability goal through parallel simpler paths
2Reliability
If duplicate data is transmitted using different carrier frequencies, then transmission reliability is improved, but energy consumption increases
Solution Approach 1:
The patent implements partial duplication rather than complete redundancy by transmitting duplicate data only when channel conditions deteriorate or when reliability requirements are not met through single-path transmission. This partial action approach provides enhanced reliability during critical transmission conditions while avoiding the continuous energy consumption of always transmitting duplicates, thus balancing reliability improvement with energy efficiency
Data Source
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AI summary
This application provides a data transmission method and apparatus. The method includes: obtaining, by a terminal, information used to indicate a first condition; obtaining to-be-transmitted data; and when the first condition is met, sending, by the terminal over a sidelink, the to-be-transmitted data that is on a first logical channel by using a first carrier frequency and the to-be-transmitted data that is on a second logical channel by using a second carrier frequency. In this method, the same data is sent, over the sidelink, on different carrier frequencies by using two logical channels, and a receiving device can receive the same duplicate data, thereby improving data transmission reliability.