5G PUSCH Resource Preemption for URLLC Interference
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Solution Overview
Problem
In 5G communication systems, there is a technical challenge in reducing mutual interference between Enhanced Mobile Broadband (eMBB) data and Ultra Reliability Low Latency Communication (URLLC) data transmissions, particularly due to overlapping resource allocation, which affects the reliability and latency requirements of URLLC data.
Innovation Solution
A resource control method is implemented where user equipment (UE) determines overlaps between eMBB and URLLC PUSCH resources using Preemption Indication (UPI) information, allowing for dynamic adjustment of resource allocation to prevent interference by stopping eMBB data transmission in overlapping resources when necessary, ensuring URLLC data can be transmitted effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If eMBB data transmission is allowed in allocated resources, then resource utilization is improved, but interference with URLLC data transmission increases
Solution Approach 1:
The gNB performs preliminary scheduling of eMBB data in step 1, allocating resources in advance. Before actual transmission, the system checks for URLLC arrival in step 2, and if URLLC is detected, the eMBB transmission is preempted in step 4. This preliminary scheduling followed by conditional preemption resolves the contradiction by initially maximizing resource utilization while maintaining the ability to protect URLLC reliability when needed.
Solution Approach 2:
The system dynamically adjusts resource allocation based on real-time conditions. The eMBB transmission status is changed from definite to conditional through the preemption mechanism. When URLLC data arrives, the system dynamically switches from eMBB transmission to URLLC transmission in the overlapping resources, resolving the contradiction by making resource allocation flexible rather than fixed.
2Reliability
If URLLC data transmission is prioritized, then transmission reliability is improved, but resource waste increases due to stopping eMBB transmission
Solution Approach 1:
The preemption mechanism applies partial action by only stopping eMBB transmission in the specific time-frequency resources that overlap with URLLC data, rather than stopping all eMBB transmissions. This resolves the contradiction by providing sufficient URLLC reliability in the overlapping resources while minimizing resource waste by allowing eMBB to continue in non-overlapping resources.
Solution Approach 2:
The system applies different transmission priorities to different resources locally. In resources that overlap with URLLC allocation, URLLC gets highest priority. In non-overlapping eMBB resources, eMBB transmission continues normally. This local differentiation resolves the contradiction by ensuring URLLC reliability where needed while avoiding unnecessary resource waste elsewhere.
3Object-affected harmful factors
If dynamic resource reallocation is implemented, then interference reduction is improved, but system complexity increases
Solution Approach 1:
The system implements self-service through automatic preemption detection and execution. The gNB automatically detects URLLC arrivals, determines resource overlaps, and executes preemption decisions without requiring complex external coordination or manual intervention. This resolves the contradiction by providing effective interference reduction through automation while keeping the control mechanism relatively simple and self-contained.
Solution Approach 2:
The system uses feedback from URLLC arrival detection to trigger preemption actions. When URLLC data is detected arriving at the gNB, this feedback signal initiates the preemption process for overlapping eMBB resources. This feedback-driven approach resolves the contradiction by enabling dynamic interference reduction based on actual conditions while maintaining a relatively simple control structure through cause-effect relationships.
Data Source
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AI summary
The present application provides a resource control method including: determining whether a first Physical Uplink Shared Channel (PUSCH) resource overlaps with a time domain range or a frequency domain range occupied by UPI (URLLC (Ultra Reliability Low Latency Communication) Preemption Indication) information indication range, based on the scheduled first PUSCH resource and the UPI information indication range, wherein, the first PUSCH resource is used to transmit Enhanced Mobile Broadband (eMBB) data, the UPI information indication range indicates the time domain range or the frequency domain range to be occupied by a second PUSCH, wherein the second PUSCH resource is used to transmit URLLC data; monitoring a Physical Downlink Control Channel (PDCCH) resource containing UPI information, if the first PUSCH resource overlaps with the time domain range or the frequency domain range occupied by the UPI information indication range; and determining whether the first PUSCH resource and the second PUSCH resource indicated by the UPI information overlap, if overlapping, not transmitting the eMBB data in a resource overlapping with the second PUSCH resource.