Downlink Pre-Emption Indication for 5G QoS Resource Multiplexing
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Solution Overview
Problem
Existing 5G radio access technologies 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 receiving and transmitting downlink pre-emption indication information through monitoring configuration and explicit signaling to support dynamic resource sharing and puncturing/superposition-based multiplexing between eMBB and URLLC services, allowing for efficient resource allocation based on different numerologies and scheduling units.
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 which deteriorates URLLC service performance
Solution Approach 1:
The patent implements dynamic resource assignment where the time-section length is not fixed but adapts based on service type. For eMBB and mMTC services, longer time-sections are used to maximize throughput, while for URLLC services, shorter time-sections are allocated to minimize latency. This dynamic adjustment resolves the contradiction by allowing the system to optimize for throughput when needed and for latency when needed, rather than being constrained by a single fixed time-section length.
Solution Approach 2:
The patent segments the resource assignment mechanism by service type, creating different resource assignment schemes for different service categories. Instead of using a uniform time-section length for all services, the system divides resource management into service-specific segments, allowing eMBB/mMTC to use longer assignments for throughput optimization while URLLC uses shorter assignments for latency optimization, thereby resolving the throughput-latency tradeoff.
2Loss of time
If time-section resource assignment is shortened to reduce latency for URLLC services, then latency performance improves, but cell throughput and coverage efficiency deteriorate
Solution Approach 1:
The system dynamically selects the appropriate time-section length based on the service requirements. When URLLC traffic arrives, the system switches to shorter time-section assignments to minimize latency. When eMBB or mMTC traffic dominates, the system transitions to longer time-section assignments to maximize throughput efficiency. This dynamic adaptation allows the system to optimize for latency when URLLC is the priority while maintaining throughput efficiency when other services are active.
Solution Approach 2:
The patent changes the time-section assignment parameter based on service type and traffic conditions. The system monitors service requirements and adjusts the time-section length parameter accordingly, shortening it for URLLC to reduce latency and lengthening it for eMBB/mMTC to improve throughput. This parameter adjustment mechanism resolves the contradiction by making the time-section length a variable rather than a fixed value.
3Device complexity
If a single resource assignment scheme is used for all services, then system complexity is reduced, but the ability to meet different QoS requirements of eMBB, mMTC, and URLLC services deteriorates
Solution Approach 1:
The patent segments the resource assignment system into service-specific schemes, creating distinct assignment mechanisms for different service types. Instead of using one uniform scheme, the system divides resource management into separate tracks for eMBB, mMTC, and URLLC, each with optimized parameters. This segmentation allows the system to meet diverse QoS requirements while keeping each individual scheme relatively simple and manageable.
Solution Approach 2:
The patent creates a universal resource assignment framework that can handle multiple service types through a common structure. The system uses a unified resource management architecture that accommodates different service requirements by applying service-specific configurations within the same framework. This multi-functional approach allows a single system to serve multiple purposes without requiring completely separate mechanisms for each service type.
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.


