Multi-SIM Paging Control Using UE Busy Indication
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Solution Overview
Problem
In multi-SIM wireless communication devices, when one SIM is engaged in an ongoing service, the device may interrupt the service to respond to a paging message from another SIM, leading to wasted network resources if it does not respond, and there is a need for effective paging control between multiple SIMs and networks.
Innovation Solution
Implementing busy indication functionality at the user equipment (UE) to indicate to the network when multiple SIMs are activated, allowing the UE to transmit a busy indication in response to a paging message, thereby avoiding resource wastage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wireless communication device responds to the paging message from another SIM, then the paging can be acknowledged, but the ongoing voice call service is interrupted
Solution Approach 1:
The device applies preliminary anti-action by proactively indicating its busy status to the network before responding to the paging message. The UE transmits a busy indication message to the base station when it detects that another SIM is engaged in an ongoing service, thereby preventing the network from expecting a normal response and avoiding service interruption
2Productivity
If the wireless communication device does not respond to the paging message, then the ongoing service is maintained, but the network wastes paging resources
Solution Approach 1:
The device implements feedback by transmitting a busy indication message to the network, providing information about its current service status. This feedback mechanism allows the network to understand that the UE is busy and adjust its paging strategy accordingly, preventing wasted paging resources while maintaining ongoing services
3Reliability
If the network escalates the page across a larger area, then the paging can be ensured to reach the device, but more network resources are consumed
Solution Approach 1:
The network performs preliminary action by checking the busy indication status before escalating paging to a larger area. When the UE transmits a busy indication message, the network can take this into account and avoid unnecessary wide-area paging attempts, thereby reducing resource consumption while maintaining reliable paging delivery when needed
Data Source
AI summary
The present disclosure relates to methods and apparatuses. According to some embodiments of the disclosure, a method includes: receiving, at a user equipment, information indicating whether busy indication functionality is supported or not, wherein the busy indication functionality is associated with at least one of Core Network (CN) paging or Radio Access Network (RAN) paging. In addition, a cause value indicating busy indication between Xn interface can be used to determine whether the path switching should be performed or not.