Multi-SIM WTRU Paging Offset Optimization for Power Saving

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Solution Overview

Problem

In 5G and NR wireless communication systems, idle/inactive WTRUs face challenges in power saving and efficient paging due to frequent wake-ups for paging occasions, leading to increased battery consumption and network resource overload, especially in Multi-SIM operations where simultaneous monitoring of multiple paging occasions results in suboptimal sleep durations and frequent state transitions.

Innovation Solution

A WTRU-assistance based method that allows WTRUs to optimize paging occasions by sending offset information to networks, enabling more flexible and power-efficient operation, including determining optimal offsets and cycles to extend deep sleeping times while minimizing state transitions and power penalties.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If WTRUs monitor multiple paging occasions simultaneously in Multi-SIM operations, then network coverage and service availability are improved, but power consumption increases and battery life decreases

Engineering Contradiction:

Improvenetwork coverageVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent implements dynamic paging occasion adjustment where the WTRU determines optimal paging occasions based on network conditions and service requirements. The network can dynamically update paging occasion configurations, allowing the WTRU to monitor multiple paging occasions when needed while extending deep sleeping periods when not needed, thus adapting power consumption to actual service requirements rather than using fixed monitoring schedules

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the timing parameters of paging occasions by introducing offset values (first offset and second offset) that shift paging occasion positions relative to initial paging occasions. This parameter adjustment allows optimization of the timing between paging occasions to extend deep sleeping durations while ensuring critical paging messages are not missed, directly addressing the power consumption issue

Inventive Principle:

Principle #35Parameter changes

2Speed

If WTRUs frequently wake up for paging occasions, then paging responsiveness is improved, but deep sleeping duration is reduced and battery life decreases

Engineering Contradiction:

Improvepaging responsivenessVSAvoiddeep sleeping duration

Core Design Contradiction:

SpeedVSDuration of action of moving object

Solution Approach 1:

The patent applies preliminary action by having the WTRU determine optimal paging occasions in advance based on expected service patterns and network conditions. The network provides preliminary configurations for paging occasions that are optimized before the WTRU enters deep sleep, allowing the WTRU to wake up only at predetermined optimal times rather than frequently checking for paging messages, thus extending deep sleeping duration while maintaining responsiveness

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements periodic action with optimized paging cycles where the WTRU wakes up at regular intervals determined by optimized paging occasions. Instead of frequent wake-ups, the WTRU follows a periodic schedule with extended intervals between wake-ups, allowing longer deep sleeping durations while ensuring paging messages are caught at appropriate periodic intervals

Inventive Principle:

Principle #19Periodic action

3Adaptability or versatility

If WTRUs monitor multiple paging occasions in Multi-SIM operations, then service availability is improved, but state transition frequency increases and power efficiency decreases

Engineering Contradiction:

Improveservice availabilityVSAvoidpower efficiency

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

The patent segments the paging monitoring task by separating different SIM cards' paging occasions and optimizing them independently. Instead of monitoring all paging occasions simultaneously which causes frequent state transitions, the WTRU segments monitoring into separate time slots for different SIMs, allowing deeper sleep periods between segmented monitoring tasks while maintaining service availability for both SIMs

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS20240284401A1Methods and apparatus for power efficient paging procedures for multiple subscriber identity modules wtrus

Publication Date: 2024.08.22 INTERDIGITAL PATENT HOLDINGS INC

AI summary

A method and configurations are discussed relative to a wireless transmit/receive unit (WTRU) in the form of a multi subscriber identity module (MUSIM). The paging information for the WTRU may be optimized for power consumption. The paging information may be modified to provide one or more of a maximum deep sleeping time duration requirement, a minimum number of power state transitions, and minimum power penalty associated with power state transitions. The modified paging information may set a paging occasion offset windows and a time direction indication associated therewith.