Network Device Routing Based on Subscription Information
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Solution Overview
Problem
Current IoT networks face challenges in supporting mobility of IoT terminals, leading to failed call processing, resource inefficiency, and service overload due to the lack of a designated server for managing subscription information and overlapping call processing between network devices.
Innovation Solution
Implementing a network device with identification, determination, and decision units to route uplink and downlink messages based on subscription-related information, ensuring that messages are directed to the correct network device, thereby supporting terminal mobility and optimizing resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If each network device locally manages subscription-related information, then device complexity is reduced, but call processing reliability deteriorates when terminal moves between network devices
Solution Approach 1:
The patent introduces a specific field in uplink messages that acts as an intermediary indicator, telling the current network device whether to route the message to another network device. This mediator field resolves the conflict by enabling reliable call processing without requiring complex centralized subscription management.
Solution Approach 2:
The patent segments the subscription management function by separating the subscription information storage (remaining at home network device) from the call processing function (performed at visited network device). This segmentation allows both local management simplicity and reliable call processing to coexist.
2Adaptability or versatility
If network devices overlaply process calls in boundary areas, then call processing coverage is improved, but resource efficiency deteriorates
Solution Approach 1:
The routing indicator field acts as a mediator that prevents overlapping processing by clearly designating which network device should handle the call, even in boundary areas. This eliminates redundant processing while maintaining coverage through proper routing to the appropriate device.
3Adaptability or versatility
If multiple IoT terminals simultaneously move to one network, then network adaptability is improved, but system reliability deteriorates due to overload
Solution Approach 1:
The patent segments the load by routing terminals to their respective home network devices for call processing, even when physically connected to different network devices. This segmentation prevents overload at any single network device while maintaining mobility support.
Data Source
AI summary
A network device in a network system including a plurality of network devices, includes: an identification unit to identify whether specific information is included in an uplink message received from a specific terminal device, where the specific information includes subscription-related information indicating that the specific terminal device has a subscription to a specific network device among the plurality of network devices and the specific terminal device is locally managed by the specific network device; a determination unit to determine whether to route the uplink message on the basis of the identification of the specific information; and a decision unit to decide the specific network device to which the uplink message is routed on the basis of the specific information when routing the uplink message is determined, where each network device of the network devices in the network system locally manages terminal devices which subscribes to each network device.