Downlink Pre-Emption Indication for 5G NR Resource Multiplexing
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Solution Overview
Problem
Existing 5G NR networks face challenges in efficiently multiplexing data traffic between services with different Quality of Service (QoS) requirements, such as eMBB, mMTC, and URLLC, due to differing latency and coverage needs, leading to inefficiencies in resource allocation and utilization.
Innovation Solution
A method for monitoring and transmitting downlink pre-emption indication information, including configuring and receiving control resource sets (CORESET) to support dynamic resource sharing and puncturing/superposition-based multiplexing between eMBB and URLLC services, using explicit signaling and control channels like PDCCH and PDSCH.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If time-section resource assignment is lengthened to improve cell throughput and coverage for eMBB and mMTC services, then resource utilization efficiency improves, but latency increases making it unsuitable for URLLC services
Solution Approach 1:
The patent segments the resource assignment into two distinct types: long time-section resource assignment for eMBB/mMTC services to maximize throughput and coverage, and short time-section resource assignment for URLLC services to minimize latency. This segmentation allows each service type to operate with optimal resource assignment duration without compromising the other.
Solution Approach 2:
The patent implements dynamic resource assignment where the time-section duration is adaptively adjusted based on service type requirements. The system can switch between long and short time-section assignments dynamically, allowing eMBB/mMTC to use longer assignments for efficiency while URLLC uses shorter assignments for low latency, thereby resolving the contradiction between throughput and latency.
2Loss of time
If downlink resources are pre-empted for URLLC services to reduce latency, then URLLC performance improves, but eMBB service reliability deteriorates
Solution Approach 1:
The patent introduces a feedback mechanism where the base station sends pre-emption indication information to user equipment when downlink resources are pre-empted for URLLC services. This feedback allows eMBB user equipment to recognize when resource pre-emption occurs and adjust its reception accordingly, maintaining service reliability despite resource pre-emption for low-latency URLLC traffic.
Solution Approach 2:
The patent uses pre-emption indication information as an intermediary signal that mediates between URLLC and eMBB services. When URLLC needs to pre-empt resources, this intermediary signal notifies eMBB user equipment, allowing the system to manage the conflict between latency-critical URLLC and reliability-critical eMBB services without direct interference.
3Adaptability or versatility
If flexible frame structure design is implemented to support multiple services, then service adaptability improves, but system complexity increases
Solution Approach 1:
The patent applies local quality by configuring different monitoring parameters and time-section durations specific to each service type and user equipment. Instead of a uniform complex structure, the system tailors the monitoring configuration locally to match service requirements, reducing overall system complexity while maintaining high adaptability.
Solution Approach 2:
The patent creates a universal monitoring framework that can handle multiple service types (eMBB, mMTC, URLLC) through a single flexible configuration mechanism. The monitoring parameters and time-section resource assignment structure serve multiple functions across different service types, reducing the need for separate specialized systems and thereby lowering overall complexity while maintaining versatility.
Data Source
AI summary
Provided are a method for monitoring, transmitting, and receiving downlink pre-emption indication information in a next-generation/5G radio access network. The method may include receiving monitoring configuration information for downlink pre-emption indication information from a base station; receiving configuration information on a control resource set (CORESET) for receiving the downlink pre-emption indication information from the base station; configuring reference downlink resources based on the configuration information on a control resource set; and monitoring the downlink pre-emption indication information for the reference downlink resources.