Multi-Carrier Transmission Indication for V2X Packet Loss
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Solution Overview
Problem
Existing multi-carrier based transmission systems in V2X communications suffer from packet loss and reduced transmission performance due to the limited receiving capability of the receive end, which fails to listen to all carriers used by the transmit end, leading to missed data and impaired communication.
Innovation Solution
The transmit end sends indication information to the receive end about the carriers it is using for data transmission, allowing the receive end to adjust its receive links and synchronize with the correct carriers, thereby avoiding packet loss and enhancing data transmission performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the transmit end uses multiple carriers to transmit service data, then the transmission rate is improved, but the receive end cannot listen to all carriers due to limited receiving capability, causing packet loss
Solution Approach 1:
The service data is segmented and transmitted across multiple carriers (carrier aggregation). The transmit end divides the data stream into multiple parts and transmits them simultaneously on different carriers, thereby increasing the overall transmission rate while managing the limited receiving capability by organizing the transmission in a structured manner.
Solution Approach 2:
The receive end sends feedback information to the transmit end about which carriers it successfully received data from. This feedback mechanism allows the transmit end to adjust its transmission strategy, retransmitting only the missing data portions, thereby reducing packet loss while maintaining high transmission rates.
2Productivity
If the transmit end uses multiple carriers for data transmission, then the transmission capacity is improved, but the receive end's limited capability causes it to miss carriers, leading to serious degradation in transmission performance
Solution Approach 1:
The transmit end performs preliminary actions by pre-configuring the carrier aggregation parameters and transmission scheduling before actual data transmission. This includes determining which carriers to use, how to segment the data, and preparing retransmission strategies, thereby optimizing the transmission process in advance to maintain both capacity and reliability.
Solution Approach 2:
The system dynamically adjusts the carrier aggregation configuration based on channel conditions and receive end feedback. The transmit end can dynamically select which carriers to activate, adjust the data segmentation strategy, and modify retransmission parameters in real-time, allowing the system to adapt to changing conditions and maintain optimal transmission performance.
Data Source
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AI summary
Embodiments of the present invention relate to the field of communications technologies, and disclose a multi-carrier based transmission method, a device, and a system, so as to resolve problems that a packet loss is caused and transmission performance is affected during existing multi-carrier based transmission. A specific solution is: A first terminal device obtains first direct link data, and sends, to a second terminal device on a first transmission carrier, the first direct link data and first indication information that is used to indicate that the first terminal device sends second direct link data on at least one second transmission carrier, so that the second terminal device adjusts a receive link according to the indication information and receives the second direct link data on the second transmission carrier. The embodiments of the present invention are applied to a multi-carrier based transmission process.