Adaptive DRX Configuration for PRS Operation Requirements
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Solution Overview
Problem
Current wireless communication systems face limitations in satisfying positioning reference signal (PRS) operation requirements due to discontinuous reception (DRX) configuration constraints, leading to inefficiencies in PRS measurements and transmissions.
Innovation Solution
A method is introduced to determine the DRX limitation condition and adjust the PRS configuration by transmitting a report to a location management function component, recommending a new PRS configuration that satisfies the operation requirements, thereby implementing a transition to a configuration that meets the PRS operation needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a DRX configuration is used to reduce power consumption, then energy efficiency is improved, but PRS operation requirements cannot be satisfied
Solution Approach 1:
The patent applies dynamics by making the DRX configuration adaptive rather than static. The network can dynamically adjust DRX parameters (such as drx-OnDurationTimer, drx-SlotOffset, drx-HARQ-RTT-Timer) based on UE positioning requirements and mobility states. This allows the system to switch between power-saving mode and positioning-optimized mode, resolving the contradiction between energy efficiency and PRS operation satisfaction.
Solution Approach 2:
The patent changes DRX parameters based on positioning requirements. When positioning is needed, the network modifies DRX configuration parameters to ensure UEs remain awake during PRS occasions, thereby satisfying PRS operation requirements while still maintaining the ability to use DRX for power saving when positioning is not required.
2Loss of energy
If a strict DRX configuration is applied, then power saving is improved, but PRS measurement and transmission efficiency deteriorates
Solution Approach 1:
The patent segments the operation into different states: normal operation with strict DRX for power saving, and positioning operation with relaxed DRX for efficiency. The network configures separate DRX parameters for positioning scenarios, allowing the system to achieve both power saving during normal operation and high efficiency during positioning measurements.
Solution Approach 2:
The network performs preliminary configuration of positioning-specific DRX parameters before positioning operations begin. This allows UEs to be pre-configured with appropriate DRX settings that ensure they will be awake and ready for PRS measurements when needed, thereby maintaining both power saving and measurement efficiency.
3Device complexity
If DRX limitations are not addressed, then system complexity is reduced, but positioning accuracy and reliability deteriorates
Solution Approach 1:
The patent introduces an intermediary mechanism through positioning assistance data and network-controlled DRX configuration. The network acts as an intermediary that translates positioning requirements into appropriate DRX configurations, thereby maintaining positioning accuracy without requiring complex UE-side configuration management.
Data Source
AI summary
In an aspect, a communications device (e.g., UE, BS, LMF component, etc.) determines information related to a first positioning reference signal (PRS) configuration (e.g., UL-PRS configuration such as SRS-P, or DL-PRS configuration) associated with a user equipment (UE), determines information related to a first discontinuous reception (DRX) configuration associated with the UE, determines that a first PRS operation requirement of the first PRS configuration is not satisfied by the first DRX configuration due to a DRX limitation condition, and perform an action in response to the determination that the first PRS operation requirement of the first PRS configuration is not satisfied by the first DRX configuration due to the DRX limitation condition.