Dynamic Transmission Mode Selection for URLLC Latency and Reliability
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Solution Overview
Problem
Current wireless communication technologies face difficulties in meeting the flexible reliability and latency requirements of Ultra-Reliable and Low Latency Communications (URLLC) services due to fixed transmission modes, which are not adaptable to varying service needs.
Innovation Solution
A data transmission method and apparatus that dynamically adjust between one-time transmission and automatic repeat transmission modes based on service load, latency, and channel quality, using first indication information to determine the appropriate transmission mode for service data, allowing for flexible reliability and latency adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If one-time transmission mode is used for URLLC service data, then latency is reduced, but transmission reliability deteriorates due to lack of feedback-based retransmission
Solution Approach 1:
The patent applies dynamics by making the transmission mode adjustable rather than fixed. The network device can dynamically switch between one-time transmission mode and feedback-based automatic repeat mode based on real-time service requirements, channel conditions, and latency constraints. This dynamic adaptability allows the system to optimize the trade-off between latency and reliability for different URLLC service scenarios.
2Reliability
If feedback-based automatic repeat mode is used for URLLC service data, then transmission reliability is improved, but latency increases due to feedback and retransmission processes
Solution Approach 1:
The patent applies dynamics by making the transmission mode adjustable rather than fixed. The network device can dynamically switch between one-time transmission mode and feedback-based automatic repeat mode based on real-time service requirements, channel conditions, and latency constraints. This dynamic adaptability allows the system to optimize the trade-off between latency and reliability for different URLLC service scenarios.
3Device complexity
If fixed transmission mode is used for service data, then system complexity is reduced, but adaptability to varying service requirements deteriorates
Solution Approach 1:
The patent applies dynamics by making the transmission mode adjustable rather than fixed. The network device can dynamically switch between one-time transmission mode and feedback-based automatic repeat mode based on real-time service requirements, channel conditions, and latency constraints. This dynamic adaptability allows the system to optimize the trade-off between latency and reliability for different URLLC service scenarios.
Solution Approach 2:
The patent applies parameter changes by modifying the transmission mode parameter based on service requirements. The system changes the transmission mode parameter between two states (one-time transmission and feedback-based automatic repeat) depending on the specific URLLC service scenario, channel conditions, and latency constraints, thereby achieving adaptability without significantly increasing system complexity.
4Loss of time
If one-time transmission mode is used, then resource utilization rate is reduced, but latency requirement is met
Solution Approach 1:
The patent applies dynamics by making the transmission mode adjustable rather than fixed. The network device can dynamically switch between one-time transmission mode and feedback-based automatic repeat mode based on real-time service requirements, channel conditions, and latency constraints. This dynamic adaptability allows the system to optimize the trade-off between latency and reliability for different URLLC service scenarios.
Data Source
Figure 1~3
AI summary
The present invention provides a data transmission method and an apparatus. The method includes: determining, by an access network device, a transmission mode of service data, where the transmission mode includes a one-time transmission mode and an automatic repeat transmission mode; sending, by the access network device, first indication information to a terminal device, where the first indication information indicates the determined transmission mode; and sending, by the access network device, the service data to the terminal device using the determined transmission mode. The data transmission method and the apparatus in the present invention can meet flexible reliability and latency requirements.