Core Network Handover via Access Node Mediation
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Solution Overview
Problem
Existing wireless communication technologies face challenges in efficiently managing network handovers, particularly when network structures change, leading to difficulties in switching connections between terminal devices and core network devices.
Innovation Solution
A handover method and terminal device system where the first and second core network devices communicate with the terminal device using the same access network device, allowing for a seamless handover by establishing and switching connections without changing the access network device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional handover procedures are used when network structure changes, then connection switching between terminal device and core network device becomes complex, but maintaining connection stability and communication efficiency deteriorates
Solution Approach 1:
The access network device serves as an intermediary that maintains the terminal device's connection during core network device handover. The terminal device keeps its connection to the access network device unchanged while the access network device establishes new connections with target core network devices, thereby simplifying the handover procedure and maintaining connection stability simultaneously
Solution Approach 2:
The handover process is segmented into two independent parts: (1) terminal device to access network device connection remains unchanged, and (2) access network device to core network device connection is switched. This segmentation allows the complex core network handover to occur without affecting the terminal device, reducing overall procedure complexity while maintaining reliability
2Adaptability or versatility
If multiple access network devices are involved in handover between core network devices, then connection switching flexibility improves, but network communication efficiency deteriorates
Solution Approach 1:
The access network device combines multiple functions: it serves as the access point for the terminal device and simultaneously manages connections to multiple core network devices. By merging these functions in one device, the patent avoids involving multiple access network devices in the handover process, thereby maintaining communication efficiency while still providing connection switching flexibility through core network device selection
Data Source
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AI summary
A handover method, a core network device, an access network device, and a terminal device are provided. The handover method includes: determining, by a second core network device, that a connection between the terminal device and the second core network device needs to be switched to a connection between the terminal device and a first core network device, where the first core network device and the second core network device communicate with the terminal device by using a same access network device; and sending, by the second core network device, a change message to the first core network device, where the change message is used to notify the first core network device that the connection between the terminal device and the second core network device needs to be switched to the connection between the terminal device and the first core network device. Based on a handover procedure initiated by the second core network device, the connection between the terminal and the second core network may be switched to the connection between the terminal and the first core network without switching of the access network device, so that a network communication requirement is efficiently met.