RF Device Allocation for Dual-SIM Service Continuity
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Solution Overview
Problem
Dual-card cellular phones face interruptions in ongoing services due to the need to respond to paging messages from another subscriber identity, especially when these messages are for non-call services, leading to transmission timeouts.
Innovation Solution
A mobile communication device with a controller that selectively allocates its RF device to communicate using one subscriber identity for ongoing services and ignores or deactivates non-essential operations associated with another subscriber identity, allowing it to prioritize high-priority services by avoiding low-priority paging messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the RF device is allocated to respond to paging messages for another subscriber identity, then the device can maintain service availability for multiple identities, but the ongoing service associated with one subscriber identity will be interrupted
Solution Approach 1:
The patent implements dynamic RF device allocation by introducing a priority mechanism that allows the system to flexibly switch between serving different subscriber identities based on current service states. The controller dynamically determines whether to respond to paging messages for SIM1 or maintain ongoing services for SIM2, creating an adaptive resource allocation system that resolves the contradiction between multi-identity availability and service continuity.
2Adaptability or versatility
If the device responds to PS paging messages for non-call services, then complete service coverage is maintained, but connection establishment and data transfer take a long time causing transmission timeout
Solution Approach 1:
The patent applies preliminary action by proactively determining the service type indicated in PS paging messages before initiating time-consuming connection establishment and data transfer operations. The controller examines the paging message content in advance, identifies non-call services, and makes a pre-decision to ignore these messages when SIM2 has ongoing services, thereby preventing time losses before they occur.
3Device complexity
If the RF device is shared between two subscriber identities, then device complexity is reduced, but the paging message for one identity cannot be missed while maintaining service for the other
Solution Approach 1:
The patent implements local quality by applying different handling strategies to different types of paging messages based on their content and priority. Instead of uniformly responding to all paging messages or ignoring all of them, the controller selectively processes call-related paging messages while ignoring non-call service paging messages, creating a differentiated quality of service for different message types received on the shared RF device.
Data Source
AI summary
A mobile communication device including a Radio Frequency (RF) device and a controller is provided. The controller is coupled to the RF device and configured to allocate the RF device to selectively communicate with a Packet Switched (PS)-based network using a first subscriber identity or with a service network using a second subscriber identity, and ignore a paging message associated with the first subscriber identity during an ongoing on-demand service associated with the second subscriber identity.