Uplink Resource Sharing with DCI Priority to Prevent URLLC Preemption
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Solution Overview
Problem
In 5G communication systems, the reliability of ultra-reliable low-latency communication (URLLC) services is compromised due to unpredictable and bursty nature, leading to issues with spectrum sharing between URLLC and enhanced mobile broadband (eMBB) services, where resource preemption affects URLLC transmission reliability.
Innovation Solution
A communication method and apparatus that determines specific conditions for uplink transmission to prevent resource preemption by using preemption indication (PI), ensuring that URLLC transmissions do not preempt or are preempted by higher-priority services by overlapping time-frequency resources based on DCI timing and priority settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If dynamic spectrum resource sharing is implemented through multiplexing or preemption to reduce URLLC transmission latency, then productivity is improved, but reliability deteriorates due to resource preemption affecting URLLC transmission
Solution Approach 1:
The patent implements dynamic spectrum resource sharing where the UE can dynamically switch between transmitting URLLC and eMBB services based on priority indicators received from the network. The UE monitors DCI formats and priority information to determine whether to preempt eMBB resources for URLLC transmission, allowing flexible adaptation to changing traffic conditions while maintaining reliability through network-controlled decision-making
Solution Approach 2:
The patent changes the parameter of resource allocation priority by introducing priority indicators in DCI messages. The UE uses these priority parameters to determine whether to transmit URLLC or eMBB services on overlapping time-frequency resources, enabling dynamic adjustment of transmission reliability and latency based on current network conditions and service requirements
2Speed
If a URLLC UE preempts eMBB resources to ensure low latency URLLC transmission, then speed is improved, but reliability worsens when the URLLC UE itself needs to receive PI for its own transmissions
Solution Approach 1:
The patent introduces the network (base station) as an intermediary that controls the preemption process. The network sends DCI messages with priority indicators to the UE, instructing it when to preempt eMBB resources for URLLC transmission. This intermediary control prevents the UE from making erroneous preemption decisions that would harm its own URLLC reliability, as the network has global knowledge of all UE transmission states
Data Source
AI summary
This application provides a communication method and a communication apparatus. The communication method includes: receiving first downlink control information DCI, the first DCI indicating a first time-frequency resource; determining a second time-frequency resource, where the second time-frequency resource is used for uplink transmission, and the first time-frequency resource overlaps the second time-frequency resource; and when the uplink transmission meets a first condition, transmitting uplink information on the second time-frequency resource.