Multi-SIM UE Network Switching via Leaving Operator Message
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Solution Overview
Problem
Current dual-SIM wireless devices face challenges in efficiently managing multiple SIM networks, leading to network resource wastage and increased battery consumption due to continuous paging and hardware limitations such as single RX or single Tx capabilities.
Innovation Solution
The proposed method and system for multi-SIM user equipment (UE) enable seamless switching between multiple SIM networks by determining the need to initiate an active data session on a second SIM network while already on a first SIM network, sending a leaving operator message, and switching networks to prioritize higher priority services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE continuously monitors and pages both SIM networks simultaneously, then both SIM networks can be accessed without interruption, but network resources are wasted and battery consumption increases
Solution Approach 1:
The patent implements discontinuous reception (DRX) cycles where the UE periodically wakes up to monitor paging messages from both SIM networks and then returns to sleep mode. This periodic monitoring approach maintains network accessibility while dramatically reducing battery consumption compared to continuous monitoring. The UE can configure different DRX parameters for each SIM network to optimize the balance between responsiveness and power savings.
Solution Approach 2:
The UE performs preliminary actions by sending a leaving operator message to the current network before switching to another SIM network. This preliminary notification allows the current network to release resources allocated to the UE, preventing resource wastage while ensuring smooth network switching. The UE also proactively manages its paging reception schedule to prepare for upcoming network transitions.
2Productivity
If the UE switches networks frequently to handle higher priority services, then service quality is improved, but network switching overhead and complexity increase
Solution Approach 1:
The patent implements a priority-based network switching mechanism where the UE continuously monitors the status of services on both SIM networks and receives feedback about service quality and network conditions. When a higher priority service becomes available on the other SIM network, the UE switches networks. The switching decision is based on feedback from service status monitoring, ensuring optimal service quality while avoiding unnecessary switching that would increase complexity.
Solution Approach 2:
The patent makes the network switching behavior dynamic by allowing the UE to adjust its network selection based on real-time service priorities and network conditions. The UE can dynamically change which SIM network is active depending on the current service requirements, making the system adaptable to different scenarios without requiring complex manual configuration or rigid switching rules.
3Loss of energy
If the UE sends leaving operator messages and manages paging procedures for both SIM networks, then network resource wastage is reduced, but signaling overhead and processing time increase
Solution Approach 1:
The UE sends the leaving operator message as a preliminary action before actually switching networks or releasing resources. This advance notification allows the current network to prepare for resource release, optimizing resource management while minimizing disruption. The UE also preliminarily schedules paging reception opportunities to coordinate with network paging cycles, reducing the need for frequent signaling exchanges.
Data Source
AI summary
The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services.Embodiments herein provide a method for switching between a plurality of SIM networks by a multi SIM UE in a wireless communication network. The method includes determining, by the multi SIM that the multi SIM UE needs to initiate an active data session on a second SIM network based on one of a paging message received by the multi SIM UE from the second SIM network and at least one MO activity which needs to be delivered using the second SIM network. Further, the method includes sending, by the multi SIM UE, a leaving operator message to the first SIM network indicating that the multi SIM UE is leaving the first SIM network; and switching, by the multi SIM UE, from the first SIM network to the second SIM network by triggering procedures to initiate the active data session on the second SIM network.