URLLC Potential Resource Transmission for Reliability
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Solution Overview
Problem
The conflict between semi-static resource configuration and dynamic changes in resource properties in Ultra Reliable & Low Latency Communication (URLLC) systems leads to unreliable data transmission, as data arrival times often mismatch resource configurations, resulting in partial cancellation of uplink transmissions and increased signaling complexity.
Innovation Solution
The proposed solution involves using potential resources for data transmission when normal resources are unavailable due to signaling changes, allowing flexible resource configuration. The terminal and base station determine potential resources in the same manner, ensuring reliable data transmission without the need for complex dynamic signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If semi-static resource configuration is used for URLLC uplink transmission, then resource allocation is simplified and signaling overhead is reduced, but data transmission reliability deteriorates when data arrival time mismatches resource configuration
Solution Approach 1:
The patent pre-configures multiple transmission opportunities (TOs) with different redundancy versions (RVs) in advance. When data arrives at different times, the terminal can immediately select the appropriate pre-configured TO without requiring dynamic signaling, thus maintaining both simplicity and reliability.
Solution Approach 2:
The patent changes the parameter of transmission opportunity by configuring multiple TOs with different RV sequences (e.g., {0,0,0,0}, {0,3,0,3}, {0,2,3,1}) for different K values. This allows the system to adapt to different data arrival times using pre-configured parameters rather than dynamic reconfiguration.
2Reliability
If dynamic signaling is used to configure new resources to enhance reliability, then data transmission reliability is improved, but signaling overhead and implementation complexity increase
Solution Approach 1:
Instead of using dynamic signaling to configure resources when needed, the patent preliminarily configures multiple transmission opportunities with different RV sequences through RRC signaling. This eliminates the need for dynamic resource reconfiguration while ensuring reliability.
Solution Approach 2:
The patent creates multiple copies of transmission opportunities with different RV configurations. These pre-configured copies can be directly used when data arrives at different times, replacing the need for dynamic signaling and resource reallocation.
3Reliability
If K repeated transmissions are configured for URLLC, then transmission reliability is enhanced, but the system cannot complete all K transmissions when data arrival time is inconsistent with resource configuration
Solution Approach 1:
The patent changes the RV parameter for different transmission opportunities based on data arrival time. By configuring different RV sequences for different K values and data arrival scenarios, the system ensures that all K transmissions can be completed regardless of when data arrives.
Solution Approach 2:
The patent introduces dynamic selection of transmission opportunities based on data arrival time. The terminal dynamically determines which pre-configured TO to use based on the arrival time, ensuring that all K transmissions are completed while maintaining the semi-static configuration structure.
Data Source
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AI summary
Disclosed by the present application are a data transmission method, device and apparatus, the method comprising: a terminal transmitting data to a base station by means of normal resources; when the base station adjusts the configuration of the normal resources so that the terminal transmits data when the normal resources are unavailable, or when the normal resources cannot complete a configured number of repeated transmissions, data is transmitted to the base station on potential resources, wherein the normal resources and the potential resources are resources used for transmitting data which are semi-statically configured for the terminal by the base station; and when the normal resources are unavailable and the potential resources do not serve as a third type of resource for other terminals, the base station and the terminal determine a potential resource for transmitting data that needs to be used according to the same mode. By employing the present application, resources may be flexibly configured between a base station and a terminal. When there is a conflict due to semi-static resource configuration and dynamic changes in resource properties during URLLC upstream transmission, potential resources may be used to complete the current data transmission, thus ensuring the reliability of data transmission.