5G UE Preemption Indication Handling for Resource Conflict
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Solution Overview
Problem
In 5G mobile communication systems, eMBB UE may not be aware of resource preemption by URLLC UE, leading to reduced eMBB service performance due to idle resources being shared between services, resulting in inefficient transmission.
Innovation Solution
A method is provided where user equipment (UE) detects a preemption indication message after receiving an uplink grant, discarding uplink data if the message is received within a specific time frame (X symbols) to ensure awareness of resource preemption, thereby ensuring reliable transmission for both eMBB and URLLC services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If resources are shared between URLLC service and eMBB service, then resource utilization efficiency is improved, but eMBB service performance deteriorates due to preemption without awareness
Solution Approach 1:
The patent implements a feedback mechanism where the network sends preemption indication information to eMBB UE, informing them when their resources are preempted by URLLC traffic. This feedback loop allows eMBB UE to adjust their transmission strategies accordingly, resolving the contradiction between resource sharing efficiency and eMBB service performance by providing transparent information about resource preemption events
Solution Approach 2:
The patent applies preliminary action by having the network pre-configure time window parameters and preemption indication mechanisms before resource conflicts occur. The eMBB UE is prepared in advance with the knowledge of how to detect and respond to preemption indications, allowing for smooth resource sharing without performance degradation
2Reliability
If eMBB UE performs blind detections to check for resource preemption, then transmission reliability is improved, but detection complexity and time consumption increase
Solution Approach 1:
The patent introduces an intermediary mechanism where the network acts as a mediator by sending preemption indication information directly to eMBB UE. This eliminates the need for complex blind detections by eMBB UE, as the network intermediary provides authoritative information about resource preemption status, thereby reducing detection complexity while maintaining transmission reliability
Solution Approach 2:
The patent extracts the detection function from eMBB UE by having the network send preemption indications. Instead of eMBB UE performing complex blind detections to determine if resources are preempted, the detection function is taken out and performed by the network, which then communicates the results to the UE, significantly reducing device complexity
3Productivity
If eMBB UE continues transmission without knowing about preemption, then transmission efficiency is maintained, but resource waste increases due to conflicting transmissions
Solution Approach 1:
The feedback mechanism of sending preemption indication information to eMBB UE enables them to immediately stop transmission when preemption is detected. This prevents resource waste from conflicting transmissions while maintaining overall transmission efficiency by allowing eMBB UE to quickly adapt to resource availability changes through the feedback loop
Data Source
AI summary
Provided are an indication method, and user equipment (UE). The indication method includes: detecting a preemption indication message after the UE receives a uplink grant; discarding a portion of uplink data or all of uplink data corresponding to the uplink grant, when the uplink data is after a symbol that is X symbols after the preemption indication message, wherein the X=t1+TA, the t1 is a time taken by the UE to decode the preemption indication message and the t1 is related to a capability of the UE, the TA is a timing advance value.