Uplink Resource Preemption for URLLC and eMBB Interference

Solution Overview

Problem

Current data transmission methods in 5G networks face interference between ultra-reliable and low-latency communications (URLLC) and enhanced mobile broadband (eMBB) services due to resource preemption, leading to excessive transmission latency and service interference when URLLC terminals need to transmit data using uplink resources allocated to eMBB services.

Innovation Solution

A data transmission method where the URLLC terminal instructs the eMBB terminal to stop using a shared uplink resource, allowing the URLLC terminal to preempt the resource for data transmission, thereby avoiding simultaneous use and reducing latency and interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of time

If the URLLC terminal directly uses the uplink resource allocated to eMBB service for data transmission, then the transmission latency of URLLC service is reduced, but interference between eMBB service and URLLC service occurs

Engineering Contradiction:

Improvetransmission latencyVSAvoidservice interference

Core Design Contradiction:

Loss of timeVSObject-affected harmful factors

Solution Approach 1:

The base station performs preliminary resource allocation by assigning both eMBB resources and preemption resources to the URLLC terminal in advance. When URLLC data needs to be transmitted, the terminal can immediately use the preemption resources without waiting for eMBB transmission to complete, thus reducing latency while avoiding interference through pre-planned resource separation.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The uplink resources are segmented into eMBB resources and preemption resources. The eMBB terminal continues to use its allocated resources for broadband data transmission, while the URLLC terminal uses specifically designated preemption resources when needed. This segmentation allows both services to operate simultaneously without interference.

Inventive Principle:

Principle #1Segmentation

2Object-affected harmful factors

If the URLLC terminal waits for eMBB transmission to complete before sending URLLC data, then service interference is avoided, but transmission latency becomes excessively long

Engineering Contradiction:

Improveservice interferenceVSAvoidtransmission latency

Core Design Contradiction:

Object-affected harmful factorsVSLoss of time

Solution Approach 1:

The base station performs preliminary resource allocation by assigning both eMBB resources and preemption resources to the URLLC terminal in advance. When URLLC data needs to be transmitted, the terminal can immediately use the preemption resources without waiting for eMBB transmission to complete, thus reducing latency while avoiding interference through pre-planned resource separation.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

Preemption resources act as an intermediary resource pool that enables URLLC transmission without conflicting with eMBB transmission. These intermediate resources serve as a buffer that allows URLLC terminals to bypass the waiting period while maintaining resource isolation, thus resolving the contradiction between latency reduction and interference avoidance.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Productivity

If the eMBB terminal and URLLC terminal simultaneously send data on the same resource, then resource utilization is improved, but mutual interference occurs between services

Engineering Contradiction:

Improveresource utilizationVSAvoidservice interference

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The uplink resources are segmented into eMBB resources and preemption resources. The eMBB terminal continues to use its allocated resources for broadband data transmission, while the URLLC terminal uses specifically designated preemption resources when needed. This segmentation allows both services to operate simultaneously without interference.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different resource qualities are assigned to different services: eMBB resources are optimized for high-throughput broadband transmission, while preemption resources are optimized for low-latency reliable transmission. Each terminal uses resources with quality characteristics matched to its service requirements, enabling simultaneous operation without mutual interference.

Inventive Principle:

Principle #3Local quality

Data Source

PatentEP3579644B1Data transmission method and apparatus

Publication Date: 2023.05.24 HUAWEI TECH CO LTD

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AI summary

Embodiments of this application disclose a data transmission method and apparatus, and relate to the field of wireless communications technologies, to resolve a prior-art problem that resource preemption causes interference between an eMBB service and a URLLC service. According to the embodiments of this application, a first terminal sends first information to a second terminal, where the first information is used to instruct the second terminal to stop using a first resource to send uplink data; and the first terminal uses the first resource to send uplink data. A solution provided in the embodiments of this application is applicable to resource preemption.