posSIB Scheduling in DRX Cycles for Low-Power UE Positioning

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Solution Overview

Problem

Existing wireless communication systems face challenges in efficiently managing power consumption during positioning operations, particularly in implementing power saving cycles like discontinuous reception (DRX) for network devices requiring positioning System Information Blocks (posSIBs).

Innovation Solution

The implementation of a DRX configuration based on a posSIB transmission schedule, with defined on durations for active reception states, to optimize power consumption and reduce energy usage during positioning calculations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If the UE continuously monitors posSIB transmissions to ensure accurate positioning, then positioning accuracy is improved, but power consumption increases

Engineering Contradiction:

Improvepositioning accuracyVSAvoidpower consumption

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

The patent implements periodic monitoring of posSIB transmissions by configuring the UE with specific monitoring occasions and time windows. Instead of continuous monitoring, the UE periodically wakes up to receive posSIBs at predetermined intervals defined by the network, allowing the UE to maintain positioning accuracy while consuming less power during idle periods between monitoring cycles.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The patent dynamically adjusts the monitoring behavior of the UE based on network conditions and positioning requirements. The network can configure different monitoring occasions, time windows, and DRX parameters adaptively, allowing the UE to transition between active monitoring and power-saving states dynamically, thereby optimizing the balance between positioning accuracy and power consumption.

Inventive Principle:

Principle #15Dynamics

2Use of energy by moving object

If the UE enters DRX mode to save power, then power consumption is reduced, but the ability to receive posSIBs timely may be compromised

Engineering Contradiction:

Improvepower consumptionVSAvoidposSIB reception reliability

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The patent applies preliminary action by pre-configuring the UE with DRX parameters, monitoring occasions, and time window information before the UE enters power-saving mode. The network provides advance notice of upcoming posSIB transmission times, allowing the UE to wake up at the correct moments to reliably receive posSIBs without missing transmissions, thus maintaining reception reliability while benefiting from power savings during DRX cycles.

Inventive Principle:

Principle #10Preliminary action

3Loss of time

If the network transmits posSIBs frequently to ensure UE has latest positioning data, then positioning data freshness is improved, but network energy consumption increases

Engineering Contradiction:

Improvepositioning data freshnessVSAvoidnetwork energy consumption

Core Design Contradiction:

Loss of timeVSUse of energy by stationary object

Solution Approach 1:

The patent ensures continuity of useful action by maintaining a scheduled, periodic transmission of posSIBs at optimized intervals rather than stopping transmissions during UE idle periods. The network continues to transmit posSIBs at predetermined occasions, ensuring that when the UE wakes up from DRX mode, the latest positioning data is already available, maintaining data freshness without requiring more frequent transmissions that would increase network energy consumption.

Inventive Principle:

Principle #20Continuity of useful action

Data Source

PatentUS12568552B2Positioning system information blocks for network devices that implement power saving cycles

Publication Date: 2026.03.03 QUALCOMM INC

AI summary

In an aspect, a user equipment (UE) may execute a discontinuous reception (DRX) configuration having an on duration during which the UE is in a time-limited active reception state, wherein the DRX configuration is based on a transmission schedule for one or more positioning System Information Blocks (posSIBs). The UE may receive the one or more posSIBs during the on duration of the DRX configuration executed by the UE.