DRX Parameter Configuration for Multi-SIM Devices

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Solution Overview

Problem

In wireless communication systems, particularly in multi-subscriber identity module (MultiSim) devices, the inclusion of multiple SIMs can lead to excessive power usage and resource conflicts, especially when operating in Dual SIM Dual Active (DSDA) or Dual SIM Dual Standby (DSDS) modes, due to staggered discontinuous reception (DRX) cycles, resulting in increased power consumption and potential resource conflicts.

Innovation Solution

The method involves determining the operating mode (DSDA or DSDS) and selecting DRX parameter values to maximize overlap in DSDA mode for reduced power consumption and minimize overlap in DSDS mode to prevent resource conflicts, by adjusting DRX cycle durations and start offsets, and potentially reselecting cells or bandwidth parts to align or stagger wake-up signals.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple SIMs are included in a device to support multiple service provider subscriptions, then service versatility and user convenience are improved, but power consumption increases and resource conflicts occur due to staggered DRX cycles

Engineering Contradiction:

Improveservice versatilityVSAvoidpower consumption

Core Design Contradiction:

Adaptability or versatilityVSUse of energy by moving object

Solution Approach 1:

The system dynamically adjusts DRX parameters (cycle duration, start offset, on-duration) based on the operating mode (DSDA or DSDS) to optimize power consumption. In DSDA mode, parameters are configured to maximize overlap and enable simultaneous operation, while in DSDS mode, parameters are adjusted to stagger operations and reduce power usage.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes key DRX parameters including cycle duration, start offset, and on-duration based on the selected operating mode. These parameter changes allow the system to transition between maximizing overlap for simultaneous operation and staggering for power savings, directly addressing the power consumption issue while maintaining service versatility.

Inventive Principle:

Principle #35Parameter changes

2Use of energy by moving object

If DRX cycles are staggered in DSDS mode to save power, then power consumption is reduced, but resource conflicts may occur due to insufficient overlap in DRX On durations

Engineering Contradiction:

Improvepower consumptionVSAvoidresource conflict prevention

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The system dynamically configures DRX parameters based on the operating mode to achieve the desired balance between power savings and resource conflict prevention. In DSDS mode, the system staggers DRX cycles while maintaining minimum required overlap to ensure reliable resource allocation and prevent conflicts.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

Specific DRX parameters (cycle duration, start offset, on-duration) are adjusted for DSDS mode to create a staggered pattern that reduces power consumption while preserving sufficient overlap windows for resource coordination, thereby preventing resource conflicts.

Inventive Principle:

Principle #35Parameter changes

3Use of energy by moving object

If DRX parameter values are optimized for maximum overlap in DSDA mode, then power consumption is reduced through extended sleep time, but device complexity increases due to mode determination and parameter selection logic

Engineering Contradiction:

Improvepower consumptionVSAvoidmode determination logic

Core Design Contradiction:

Use of energy by moving objectVSDevice complexity

Solution Approach 1:

The system implements dynamic mode determination and parameter selection that adapts to the current operating conditions. The complexity is managed through structured logic that evaluates operating mode and selects appropriate DRX parameter sets, achieving power optimization while maintaining manageable device complexity through systematic control.

Inventive Principle:

Principle #15Dynamics

4Use of energy by moving object

If DRX On durations are aligned in DSDA mode to maximize overlap, then power consumption is reduced, but resource conflicts may increase due to simultaneous activity requirements

Engineering Contradiction:

Improvepower consumptionVSAvoidresource conflict prevention

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The patent configures specific DRX parameter combinations (cycle duration, start offset, on-duration) for DSDA mode that maximize overlap to extend sleep time and reduce power consumption, while the system manages resource conflicts through coordinated parameter selection and mode-aware configuration.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS11937329B2Discontinuous reception (DRX) in multi-subscriber identity module devices

Publication Date: 2024.03.19 QUALCOMM INC

AI summary

A method of wireless communication performed by a user equipment (UE), the method including: determining to operate in a Dual SIM Dual Active (DSDA) mode or a Dual SIM Dual Standby (DSDS) mode, the UE having a first subscriber identity module (SIM) and a second SIM; and selecting a discontinuous reception (DRX) parameter value based at least in part on the DSDA mode or the DSDS mode.