Local Emergency Number List Validation Across MCC Boundaries
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Solution Overview
Problem
In wireless communication systems, users cannot input and dial emergency numbers from a local emergency number list when their device moves from a network with one mobility country code to another, even if both networks are managed by the same operator, due to invalidity determinations based on different country codes.
Innovation Solution
A method where a communication device receives a local emergency number list from a first network with a specific mobility country code and determines it valid when entering a second network with a different code, as long as both networks are in the same country, allowing emergency numbers to be dialed regardless of MCC differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the UE determines the local emergency number list is invalid when moving between networks with different MCCs, then the network security and number validation accuracy is improved, but the emergency service accessibility and user convenience deteriorates
Solution Approach 1:
The patent applies local quality by making the validity determination of the emergency number list dependent on the specific geographic context (country) rather than applying a uniform rule across all networks. The UE checks whether the first and second networks belong to the same country, and only then determines the emergency number list as valid. This localized validation approach allows the system to maintain strict validation standards while accommodating legitimate cross-network scenarios within the same country, thereby resolving the contradiction between validation accuracy and emergency service accessibility.
2Measurement precision
If the UE requires a new local emergency number list from the second network, then the network-specific number accuracy is improved, but the service continuity and response time deteriorates
Solution Approach 1:
The patent applies preliminary action by allowing the UE to proactively determine the validity of the existing emergency number list based on country information before actually needing to use emergency services. By checking whether the first and second networks are in the same country and making a validity determination in advance, the UE avoids the time-consuming process of requesting and waiting for a new emergency number list from the second network, thus maintaining service continuity while ensuring number accuracy.
3Adaptability or versatility
If the UE accepts emergency numbers from networks with different MCCs, then the device versatility and user mobility is improved, but the number validation reliability worsens
Solution Approach 1:
The patent applies dynamics by making the validity determination of the emergency number list dynamic rather than static. The UE continuously evaluates whether the current network (second network) and the network that provided the emergency number list (first network) belong to the same country. This dynamic validation approach allows the UE to adapt to different network environments while maintaining number validation reliability, resolving the contradiction between device mobility and validation reliability.
Data Source
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AI summary
A method of handling a local emergency number list for a communication device in a wireless communication system is disclosed. The method comprises receiving the local emergency number list transmitted by a first network with a first mobility country code (MCC) in the wireless communication system; and determining that the local emergency number list is valid when the communication device is in a coverage of a second network with a second MCC in the wireless communication system, if the first network and the second network are in a same country.