CSI Request Triggering for 5G Positioning Actions
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Solution Overview
Problem
Existing wireless communication systems, particularly in the context of 5G networks, face challenges in efficiently triggering positioning-related actions based on channel state information (CSI) requests, which are crucial for enhancing spectral efficiency and reducing latency.
Innovation Solution
The method involves receiving a downlink control information (DCI) communication with a CSI request field, determining positioning reference signal (PRS) configurations, and performing positioning-related actions such as measurement, transmission, or reporting based on these configurations, utilizing various trigger states and configurations to manage PRS resources effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If positioning-related actions are triggered using existing wireless communication systems, then positioning functionality is provided, but spectral efficiency is reduced and latency is increased
Solution Approach 1:
The patent makes the CSI request field multi-functional by enabling it to trigger both channel state information reporting and positioning-related actions. The gNB can set bit(s) in the CSI request field to indicate positioning actions such as PRS resource set indication, PRS resource indication, or positioning measurement configuration, allowing a single field to serve dual purposes and improving spectral efficiency while reducing latency
Solution Approach 2:
The patent combines the positioning triggering mechanism with the existing CSI reporting framework. By merging positioning action triggering into the DCI format 0_1 or 0_2 messages that already contain CSI request fields, the system eliminates separate positioning triggering signaling, thereby reducing latency and improving spectral efficiency
2Productivity
If separate signaling is used for positioning actions, then positioning functionality is achieved, but signaling overhead increases and efficiency decreases
Solution Approach 1:
The CSI request field is designed to serve multiple functions: triggering CSI reporting, triggering positioning actions, and indicating PRS resource configurations. This multi-functionality reduces the need for separate dedicated positioning signaling fields, thereby reducing signaling overhead while maintaining positioning action efficiency
Solution Approach 2:
The existing DCI structure and CSI reporting mechanism serve positioning functions as well. The gNB utilizes the already-established DCI format 0_1 or 0_2 messages and CSI request field structures to simultaneously trigger positioning actions, allowing the system to serve positioning needs through existing infrastructure rather than requiring additional dedicated signaling resources
Data Source
AI summary
In an aspect, an LMF component may determine to trigger positioning-related action(s) at a UE. The LMF component may request that a serving BS of the UE trigger the positioning-related action(s). The serving BS may transmit a DCI communication with a CSI request field (e.g., that triggers at least CSI reporting, or triggers positioning-related action(s) only). The CSI request field may further be associated with positioning-related information including at least one PRS configuration, at least one positioning measurement request, at least one location reporting request, or a combination thereof. The UE may perform the positioning-related action(s) based on the positioning-related information.