Core Network Device Network Selection for Next-Generation UE
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Solution Overview
Problem
In the eLTE system, there is currently no method for next-generation UE to determine which core network to access when using an eLTE eNB, leading to a lack of network selection efficiency.
Innovation Solution
A network selection method where a core network device receives messages from a terminal device and a radio access network device to instruct the terminal device to access either the EPC or NG core network based on load information and subscription data, ensuring accurate network selection by comprehensively considering both terminal and network-side selections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the terminal device independently selects a network to access, then the terminal device has autonomy in network selection, but the network selection accuracy may be insufficient without network-side consideration
Solution Approach 1:
The core network device provides feedback to the terminal device about network selection decisions. The terminal device sends a first message indicating its preferred network, and the core network device responds with a second message that either confirms the selection or provides alternative network options, creating a feedback loop that improves selection accuracy while maintaining terminal autonomy
Solution Approach 2:
The core network device acts as an intermediary between the terminal device and the network. It receives the terminal's network selection preference, evaluates it against network conditions and subscription data, and mediates the final network selection by sending instructions back to the terminal device
2Measurement precision
If the core network device selects the network for the terminal device, then the network selection accuracy is improved, but the terminal device loses autonomy in network selection
Solution Approach 1:
The terminal device performs preliminary network selection by independently choosing a preferred network and sending this preference to the core network device in the first message, before the core network device makes its final determination
Solution Approach 2:
The core network device provides feedback in the second message that either confirms the terminal's preferred network or instructs alternative network selection, maintaining terminal involvement in the decision-making process while ensuring accurate network selection
3Device complexity
If no network selection method is provided for next-generation UE in eLTE system, then the system maintains simplicity, but network selection efficiency deteriorates
Solution Approach 1:
The solution provides a universal network selection mechanism that works for both legacy UE and next-generation UE in the eLTE system. The same message exchange protocol (first message from terminal, second message from core network) handles different UE types, maintaining system simplicity while enabling efficient network selection for next-generation UE
Data Source
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AI summary
A network selection method and an apparatus are provided, and relate to the field of communications field, so that a core network to be accessed by next-generation UE via an eLTE eNB can be determined. The method includes: receiving, by a first core network device, a first message sent by a radio access network device, where the first message carries first information, and the first information is used to indicate that a terminal device requests to access a first network to which the first core network device belongs; and when the first core network device does not accept access of the terminal device to the first network, sending, by the first core network device, a second message to the radio access network device, where the second message carries second information, the second information is used to instruct to connect the terminal device to a second network, and the second network coexists with the first network.