Dynamic Neighboring Cell Measurements for Emergency Calls
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Solution Overview
Problem
Wireless communication devices face high resource consumption and inefficiency when performing neighboring cell measurements for radio access technologies (RATs) not supported by the subscription, limiting emergency call capabilities and increasing power consumption.
Innovation Solution
A method and arrangement that determine if the subscriber identity module and wireless communication network support a specific RAT for emergency calls, enabling neighboring cell measurements only if the network supports emergency calls using that RAT, thereby optimizing resource usage and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the device performs neighboring cell measurements for RATs not supported by the subscription, then emergency call capability is improved, but power consumption increases
Solution Approach 1:
The patent applies dynamics by making the measurement behavior adaptive rather than static. The device dynamically adjusts whether to perform neighboring cell measurements based on real-time conditions: it checks if the network supports emergency calls on the unsupported RAT and only performs measurements when necessary. This conditional, dynamic approach allows the system to optimize power consumption while maintaining emergency call capability when needed.
2Reliability
If the device performs neighboring cell measurements for RATs not supported by the subscription, then emergency call capability is improved, but resource consumption increases
Solution Approach 1:
The patent applies preliminary action by performing a preparatory check before executing the main measurement process. The device first determines whether the network supports emergency calls on the unsupported RAT, and only if this condition is met does it proceed to perform neighboring cell measurements. This preliminary verification prevents unnecessary resource consumption by avoiding measurements when they would not contribute to emergency call capability.
3Measurement precision
If the radio is used for measurements of one RAT, then measurement accuracy is improved, but it cannot be used for measurements and communication of another RAT
Solution Approach 1:
The patent resolves this contradiction through dynamic resource allocation. Instead of permanently dedicating the radio to one RAT, the system dynamically decides when to switch based on operational needs. The radio performs measurements on the unsupported RAT only when emergency call capability requires it, and otherwise remains available for the supported RAT, thus achieving both measurement accuracy when needed and multi-RAT adaptability.
Data Source
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AI summary
A method is disclosed of a wireless communication device connectable to a subscriber identity module and adapted to communicate with a wireless communication network using one of a first radio access technology and a second radio access technology. The method comprises determining if the subscriber identity module supports the second radio access technology and determining if the wireless communication network supports emergency call using the second radio access technology. If the subscriber identity module does not support the second radio access technology, the method comprises performing neighboring cell measurements for the second radio access technology only if the wireless communication network supports emergency call using the second radio access technology. Corresponding computer program product, arrangement and wireless communication device are also disclosed.