5G NR Terminal Resource Reuse for URLLC and eMBB Services
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Solution Overview
Problem
Current 5G NR communication systems face challenges in efficiently supporting both ultra-reliable & low latency communication (URLLC) and enhanced mobile broadband (eMBB) services due to resource reuse strategies, leading to suboptimal resource utilization and interference issues, particularly in dynamic reusing modes where URLLC puncturing affects eMBB service reception.
Innovation Solution
A data transmission method where a terminal reuses a resource to transmit first data and then retransmits affected data on a separate resource, allowing for real-time adjustment and self-scheduling without waiting for network re-initiation, improving resource utilization and reducing latency impacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If dynamic reusing mode is used where URLLC service punctures eMBB service resources, then resource utilization is improved and latency for URLLC is reduced, but reception performance of eMBB service deteriorates and requires full retransmission
Solution Approach 1:
The patent segments the eMBB transport block into multiple codeblock groups and assigns different HARQ process IDs to different groups. When URLLC punctures only certain resources, only the affected codeblock groups need retransmission rather than the entire transport block, thus maintaining reliability while improving resource utilization.
Solution Approach 2:
The patent implements partial retransmission by allowing the terminal to retransmit only the codeblock groups that were affected by URLLC puncturing, rather than retransmitting the complete eMBB transport block. This partial action reduces waste and improves overall system efficiency.
2Adaptability or versatility
If dynamic reusing mode is used for URLLC and eMBB services, then flexibility in resource allocation is improved, but interference between services increases and requires network re-initiation for re-scheduling
Solution Approach 1:
The patent implements feedback mechanisms where the network sends HARQ feedback indicating which codeblock groups were successfully received and which need retransmission. This feedback allows the terminal to efficiently retransmit only the affected portions without requiring full network re-initiation, thus managing interference while maintaining flexibility.
Solution Approach 2:
The patent dynamically assigns different HARQ process IDs to different codeblock groups within the same transport block, allowing flexible and dynamic resource allocation and retransmission strategies that adapt to the specific interference patterns caused by URLLC puncturing.
3Reliability
If semi-static reusing mode is used for URLLC service resources, then interference with eMBB service is avoided, but resource utilization deteriorates due to low flexibility
Solution Approach 1:
The patent introduces dynamic HARQ process assignment for codeblock groups, allowing the system to transition from static to dynamic resource management. This enables high resource utilization when URLLC puncturing occurs while maintaining service quality through targeted retransmission of only affected codeblock groups.
Data Source
AI summary
Disclosed are a data transmission method, a network side device and a terminal. The method includes: reusing, by a terminal, a first resource to transmit first data, wherein the first data is data of a first service, the first resource is a resource in a second resource for transmitting second data, the second data is initial transmission data of a second service, a latency requirement of the first service is higher than a latency requirement of the second service; and retransmitting, by the terminal, third data on a third resource, wherein the third data is all or part of the second data.