Multi-SIM RF Resource Arbitration for Paging Conflicts

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Solution Overview

Problem

Multi-SIM devices face challenges in sharing a single radio frequency (RF) resource when receiving simultaneous paging requests from multiple SIMs, leading to paging collisions, delays, or failures in receiving multiple mobile terminated services.

Innovation Solution

A method and system that detect page sharing conflicts between SIM stacks, determine connection statuses, and prioritize the RF resource grant to SIMs connected via cellular connections to ensure efficient communication and power conservation during simultaneous paging requests.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If a single RF resource is used to communicate with the network entity, then the device complexity is reduced, but paging collisions occur when multiple SIMs receive paging requests simultaneously

Engineering Contradiction:

ImproveRF resource configurationVSAvoidPaging response reliability

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The system performs preliminary detection to identify page sharing conflicts before they cause paging collisions. By detecting when multiple SIMs simultaneously require the RF resource, the system can preemptively allocate resources or adjust timing to prevent collision, thereby maintaining reliability without adding complex hardware

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The processor acts as an intermediary between multiple SIMs and the single RF resource. It manages the arbitration process by detecting conflicts and determining connection statuses, mediating resource allocation to ensure fair and reliable access for all SIMs without requiring multiple physical RF resources

Inventive Principle:

Principle #24Intermediary (Mediator)

2Speed

If the RF resource is granted to one SIM, then that SIM receives timely paging response, but other SIMs suffer delays or failures in paging response

Engineering Contradiction:

ImprovePaging response speedVSAvoidPaging response delay

Core Design Contradiction:

SpeedVSLoss of time

Solution Approach 1:

The system detects page sharing conflicts in advance and determines connection statuses before paging responses are due. This preliminary action enables proactive resource allocation that prevents time loss for any SIM, ensuring all SIMs can receive paging responses without significant delays

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system changes the allocation parameter of the RF resource dynamically based on detected connection statuses. By adjusting which SIM receives the RF resource at different times based on their connection status and conflict detection, the system optimizes response speed for prioritized SIMs while minimizing time loss for others

Inventive Principle:

Principle #35Parameter changes

3Adaptability or versatility

If the multi-SIM device listens to paging requests and beacon signals simultaneously in DRX mode, then communication coverage is improved, but power consumption increases

Engineering Contradiction:

ImproveCommunication coverageVSAvoidBattery consumption

Core Design Contradiction:

Adaptability or versatilityVSUse of energy by moving object

Solution Approach 1:

The system performs preliminary detection of page sharing conflicts and connection statuses before full communication activation. By identifying which SIMs actually need RF resource allocation in advance, the device can avoid unnecessary activation of power-intensive communication functions, thus reducing overall power consumption while maintaining communication coverage

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system applies partial action by selectively activating communication listening for only those SIMs that have active connections or pending paging requests. Instead of continuously monitoring all SIMs at full power, it adjusts the extent of listening activity based on detected needs, reducing energy consumption while maintaining necessary communication coverage

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS20230292287A1Method and system for sharing radio frequency resource in multi-SIM device

Publication Date: 2023.09.14 SAMSUNG ELECTRONICS CO LTD

AI summary

A method for sharing a radio frequency (RF) resource among multi-subscriber identification module (SIM) stacks in a multi-SIM device, includes: receiving two paging requests from the multi-SIM stacks for performing communication with a network entity via the RF resource; transmitting the two paging received requests to the network entity via the RF resource; detecting a page sharing conflict between the two paging requests of the multi-SIM stacks; determining, based on the detection of the page sharing conflict, a connection status of a connection between each stack of the multi-SIM stacks and the network entity. The connection status indicates a communication medium via which each stack of the multi-SIM stacks is connected with the network entity. The method includes prioritizing, based on the determined connection status, a grant of the RF resource to a stack of the multi-SIM stacks whose connection status indicates a cellular connection as the communication medium.