Dual-SIM Cell Measurement Sharing for Faster Network Reconnection
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Solution Overview
Problem
In multi-SIM multi-standby terminal devices, the second SIM card takes a long time to access the wireless network after the first SIM card completes its service due to the lack of real-time measurement of changing wireless environments, leading to poor user experience.
Innovation Solution
Perform a first measurement using the first SIM card on the measurement cell set of the second SIM card and generate a measurement report, determining the current serving cell based on this report after the first SIM card completes its service, to facilitate efficient network reconnection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the first SIM card preempts radio frequency resources to execute its services, then the first SIM card's service execution is ensured, but the second SIM card experiences long delay in accessing the wireless network
Solution Approach 1:
The patent applies preliminary action by having the terminal device perform cell measurements and generate measurement reports for the second SIM card before the first SIM card actually needs to access the network. When the first SIM card preempts resources, the measurement data is already available, allowing the second SIM card to quickly resume network access without performing full measurements, thus reducing the network access delay while ensuring the first SIM card's service reliability
Solution Approach 2:
The patent merges the measurement processes of multiple SIM cards by having the terminal device perform cell measurements that can serve multiple SIM cards simultaneously. The measurement report generated for the second SIM card is stored and reused when needed, combining the measurement functionality to serve both SIM cards efficiently, thereby reducing redundant measurements and accelerating network access for the second SIM card
2Reliability
If the terminal device performs full network search and cell selection for the second SIM card after first SIM card service completion, then the second SIM card can access the network, but the access time is extended
Solution Approach 1:
The patent performs cell measurements and generates measurement reports in advance for the second SIM card before network access is actually needed. These preliminary measurement results are stored and can be directly used when the first SIM card completes its service, allowing the second SIM card to skip the time-consuming full network search and cell selection process, thus reducing access time while maintaining access reliability
Solution Approach 2:
The patent creates a copy of the measurement report generated for the second SIM card and stores it for future use. When network access is needed after the first SIM card service, this copied measurement data is reused instead of performing new measurements, significantly reducing the time required for network access while ensuring reliable connection establishment
Data Source
AI summary
Provided are a communication method and related device. The method is applied to a terminal device including a first Subscriber Identity Module (SIM) card and a second SIM card. A request for first service is received from the first SIM card; in response to the first SIM card needing to preempt a radio frequency resource used by the second SIM card, a measurement cell set of the second SIM card is sent to the first SIM card; a first measurement is performed using the first SIM card and a first measurement report is generated, the first measurement including a measurement performed based on the measurement cell set of the second SIM card; the first measurement report is sent to the second SIM card after execution of the first service is completed; and a current serving cell of the second SIM card is determined according to the first measurement report.