Dual Connectivity Core Network Identification in LTE-5G Networks
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Solution Overview
Problem
Current dual connectivity methods between LTE and 5G systems fail to determine the core network corresponding to user equipment (UE) when the master access network device is connected to multiple core networks, preventing seamless dual connectivity.
Innovation Solution
A method where the first access network device sends a request message to the second access network device to serve as a secondary access network, including identifiers for downlink and uplink tunnels and quality of service attributes, allowing the second access network device to determine the correct core network connection for the UE.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the master access network device is connected to multiple core networks, then the network flexibility and service coverage are improved, but the secondary access network device cannot determine the correct core network for the UE, causing dual connectivity failure
Solution Approach 1:
The master access network device performs preliminary actions by determining the target core network for the UE before establishing dual connectivity, and pre-configures the secondary access network device with the core network identification information through a request message, so that the secondary device can immediately identify the correct core network when needing to establish connection
Solution Approach 2:
The master access network device acts as an intermediary that bridges the secondary access network device and the core network by obtaining and transmitting the core network identification information from the core network to the secondary device, enabling the secondary device to correctly identify and connect to the target core network without direct access to core network identification
2Device complexity
If the secondary access network device establishes connection without core network identification, then the connection establishment process is simplified, but the dual connectivity cannot be implemented correctly
Solution Approach 1:
The core network identification information is obtained and configured in advance through a request message exchange between access network devices, so that when the secondary access network device needs to establish connection to the core network, the identification information is already available, enabling correct dual connectivity implementation without adding complex real-time determination mechanisms
Data Source
AI summary
The present disclosure relates to dual connectivity methods. In one example method, a first access network device sends a request message to a second access network device, where the request message is used to request the second access network device to serve as a secondary access network device of a terminal served by the first access network device. Then, the first access network device receives an acknowledgment message from the second access network device, where the acknowledgment message is used to acknowledge to the first access network device that the second access network device agrees to serve as the secondary access network device of the terminal.