Cell Service Resumption Using Location-Based Sync Recovery

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing communication technologies cause excessive power consumption and delay in resuming cell service due to network re-searching by mobile terminals with dual-card dual-standby mode, especially when one SIM card enters an offline state during a call, leading to inefficient energy usage and prolonged service restoration times.

Innovation Solution

A method and terminal that utilize geographic location and time-frequency position information to resume cell service by initiating a timer upon entering an offline state, determining if the terminal has not left the cell based on geographic location, and resuming service using stored synchronization information without full network re-search.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the terminal performs full network re-search to resume cell service, then the terminal can ensure accurate cell synchronization, but the power consumption increases and service restoration time is delayed

Engineering Contradiction:

Improvecell synchronization accuracyVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The terminal performs network searching and acquires cell service information in advance before entering the offline state. When resuming service, it uses the pre-acquired time-frequency position information and geographic location data to quickly determine cell synchronization without performing a full network re-search, thereby reducing power consumption while maintaining synchronization accuracy

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The terminal changes the searching strategy based on whether it has moved. When geographic location shows the terminal is still in the same cell, it uses a simplified resumption process with reduced searching parameters. When location changes indicate movement to a new cell, it performs a complete network re-search with full parameters to ensure accurate synchronization

Inventive Principle:

Principle #35Parameter changes

2Reliability

If the terminal performs full network re-search to resume cell service, then the terminal can ensure accurate cell synchronization, but the service restoration time is delayed

Engineering Contradiction:

Improvecell synchronization accuracyVSAvoidservice restoration time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The terminal performs network searching and acquires cell service information in advance before entering the offline state. When resuming service, it uses the pre-acquired time-frequency position information and geographic location data to quickly determine cell synchronization without performing a full network re-search, thereby reducing service restoration time while maintaining synchronization accuracy

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The terminal changes the searching strategy based on whether it has moved. When geographic location shows the terminal is still in the same cell, it uses a simplified resumption process with reduced searching parameters to minimize restoration time. When location changes indicate movement to a new cell, it performs a complete network re-search with full parameters to ensure accurate synchronization

Inventive Principle:

Principle #35Parameter changes

3Use of energy by moving object

If the terminal uses simplified resumption method without full network search, then power consumption is reduced and service restoration is faster, but cell synchronization accuracy may be compromised

Engineering Contradiction:

Improvepower consumptionVSAvoidcell synchronization accuracy

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The terminal uses geographic location information as feedback to dynamically adjust the resumption strategy. By comparing current location with location at offline entry, it determines whether to use the simplified method (same cell) or full network re-search (different cell), ensuring synchronization accuracy is maintained when needed while saving power when possible

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The terminal dynamically adjusts the resumption approach based on real-time conditions. It uses geographic location data to determine the terminal's movement status and adaptively selects between simplified resumption and full network re-search, making the system flexible and context-aware to balance power consumption and synchronization accuracy

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS12490226B2Methods for resuming cell service, non-transitory computer readable storage media for performing the same, and terminals capable of resuming cell service

Publication Date: 2025.12.02 SAMSUNG ELECTRONICS CO LTD

AI summary

A method for resuming cell service including acquiring first geographic location information of a terminal and first time-frequency position information of a cell corresponding to the terminal entering an offline state, the terminal being located in a coverage area of the cell when the terminal enters the offline state, and the cell service being suspended in the offline state, initiating a timer corresponding to the terminal entering the offline state, acquiring second geographic location information of the terminal and stopping the timer corresponding to the terminal exiting the offline state, and resuming the cell service based on the first time-frequency position information and a timer duration based on a determination that the terminal has not left the cell, the timer duration being based on a value of the timer at the stopping, and the determination being based on the first geographic location information and the second geographic location information.