Mini-slot Control Signaling for URLLC Latency
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Solution Overview
Problem
Current wireless communication technologies, such as LTE and NR, face challenges in efficiently multiplexing ultra-reliable low-latency communication (URLLC) and enhanced mobile broadband (eMBB) transmissions, particularly in managing mini-slots to meet stringent latency and reliability requirements for URLLC services.
Innovation Solution
The method involves identifying and transmitting control signaling information for mini-slots within eMBB slots to enable on-demand URLLC transmissions, using techniques like index values and resource allocation to facilitate efficient multiplexing and resource usage, allowing for shorter turn-around times and improved latency performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If mini-slots are used for URLLC transmissions within eMBB slots, then latency is reduced and URLLC reliability is improved, but resource allocation complexity and device complexity increase
Solution Approach 1:
The eMBB slot is segmented into multiple mini-slots, where each mini-slot can independently carry URLLC transmissions. This segmentation allows the system to allocate resources flexibly by selecting specific mini-slots within an eMBB slot structure, reducing latency for URLLC while maintaining the overall slot framework to manage complexity.
Solution Approach 2:
The patent implements dynamic resource allocation where the number and position of mini-slots within eMBB slots can be adjusted based on URLLC traffic demands. This dynamic configuration allows the system to adapt resource allocation to varying latency requirements without requiring complete reconfiguration of the transmission framework.
2Reliability
If mini-slots are used for URLLC transmissions, then URLLC reliability is improved, but control signaling overhead increases
Solution Approach 1:
The patent merges control signaling for multiple mini-slots into consolidated indication messages. Instead of sending separate control signals for each mini-slot, the system combines resource allocation information for multiple mini-slots into a single control message, reducing control signaling overhead while maintaining the ability to allocate resources reliably across multiple mini-slots for URLLC transmissions.
3Productivity
If multiple mini-slots are allocated within eMBB slots, then resource utilization efficiency is improved, but scheduling complexity increases
Solution Approach 1:
The patent applies local quality by assigning different properties to different mini-slots within eMBB slots based on local traffic requirements. Each mini-slot can be configured with specific resource allocation parameters suited to its intended use, allowing efficient resource utilization for URLLC in specific mini-slots while maintaining standard eMBB operation in others, without requiring complex global re-scheduling.
Data Source
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AI summary
A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus may identify control signaling information for a mini-slot to be used for an ultra-reliable low-latency communication (URLLC) transmission within an enhanced mobile broadband (eMBB) slot. The apparatus may transmit the control signaling information within the eMBB slot.