Virtual MSC Mapping for Subnet Differentiation
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Solution Overview
Problem
Current mobile communication systems face challenges in accurately billing and tracking terminal communications across different subnets under a single physical Mobile Switching Center (MSC), leading to incorrect billing and inability to implement services like roaming limitations due to the shared MSC/VLR number.
Innovation Solution
The system maps one physical MSC to multiple virtual MSCs, assigning unique virtual MSC numbers and establishing relationships between subnets and virtual MSC/VLR numbers, enabling the transmission of terminal location information to differentiate and accurately bill communications across subnets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If one physical MSC covers multiple subnets using a single MSC/VLR number, then network coverage and resource sharing are improved, but the ability to differentiate terminals in different subnets and implement accurate billing deteriorates
Solution Approach 1:
The patent divides a single physical MSC into multiple virtual MSCs, each assigned a unique virtual MSC/VLR number. This segmentation allows the system to maintain unified physical resource management while achieving logical separation for different subnets, enabling accurate terminal location differentiation and billing across multiple subnets covered by one physical MSC.
2Device complexity
If a single MSC/VLR number is used for the entire large local area network, then device complexity is reduced, but the ability to implement roaming limitations and accurate traffic statistics deteriorates
Solution Approach 1:
The patent introduces virtual MSC/VLR numbers as an intermediary layer between the physical MSC and terminal communications. This intermediary enables differentiated service control, roaming limitations, and accurate traffic statistics for each subnet while maintaining a unified physical infrastructure, thus providing service control flexibility without significantly increasing physical device complexity.
3Measurement precision
If multiple virtual MSCs are mapped from one physical MSC, then terminal differentiation and billing accuracy are improved, but device complexity increases
Solution Approach 1:
The patent creates virtual copies of the MSC/VLR functionality through virtualization, where each virtual MSC/VLR number represents a logical instance that can be independently configured and managed. This copying approach allows multiple subnets to be differentiated with unique identifiers while sharing the same physical hardware resources, improving terminal location identification without requiring proportional increases in physical device complexity.
Data Source
AI summary
The present invention discloses a method and a system for implementing communications between multiple subnets covered by one physical Mobile Switching Center (MSC) and an MSC. The method includes the steps of: mapping one physical MSC to multiple logical MSCs, i.e. multiple virtual MSCs, and assigning a virtual MSC number to each virtual MSC, and setting relationship(s) between location area(s) covered by the virtual MSC and the virtual MSC number of each virtual MSC; transmitting location information of a terminal with the virtual MSC number during communications to implement communications among multiple subnets. During communication, since the terminal location is transmitted according to the virtual MSC number, it is possible to differentiate the terminals located in different subnets covered by a physical MSC, therefore the roaming and handover of the terminal between the subnets can be implemented; and the roaming limitation also can be implemented through the MSC List and VLR List.