UE Multi-Base Station Access via Core Network NAS Routing
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Solution Overview
Problem
In next-generation mobile communications systems, user equipment (UE) has diverse data transmission requirements such as high rate, low latency, and high reliability, which existing technologies struggle to satisfy using a single radio access technology (RAT), leading to increased signaling and management complexity when switching between different RATs.
Innovation Solution
A method where user equipment accesses different base stations based on information from a core network device, using a non-access stratum message transmitted by one base station to perform data transmission with another base station, thereby reducing signaling and enabling efficient management of multiple radio access technologies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If user equipment switches between different radio access technologies to satisfy diverse data transmission requirements, then the adaptability to different transmission needs is improved, but the signaling complexity and management overhead increase
Solution Approach 1:
The patent introduces a core network device as an intermediary that manages and coordinates access to multiple base stations supporting different RATs. The core network device receives NAS messages from the UE and routes them to the appropriate base station, thereby reducing the signaling burden on the UE and simplifying the management of multiple access technologies.
Solution Approach 2:
The core network device is designed to handle multiple functions including NAS message routing, base station coordination, and support for multiple radio access technologies. This multi-functional approach consolidates management capabilities, reducing the overall signaling complexity while maintaining adaptability to diverse transmission requirements.
2Adaptability or versatility
If user equipment uses multiple base stations supporting different RATs, then the satisfaction of diverse data transmission requirements is improved, but the management overhead increases
Solution Approach 1:
The core network device serves as a central mediator that manages the UE's access to multiple base stations. It handles the coordination and routing of messages, thereby reducing the management overhead that would otherwise be borne by the UE when dealing with multiple RATs and base stations independently.
Solution Approach 2:
The patent merges the management functions for multiple base stations and radio access technologies into a single core network device. This consolidation of management responsibilities reduces the overall management overhead by providing a unified control point rather than requiring separate management for each RAT and base station.
3Device complexity
If non-access stratum messages are transmitted through a single base station, then the signaling complexity is reduced, but the ability to directly access optimal base station for specific data requirements is limited
Solution Approach 1:
The core network device acts as an intermediary that receives NAS messages from the UE through a single base station and then routes these messages to the most appropriate base station for handling the specific data transmission requirements. This approach maintains low signaling complexity at the UE while still enabling efficient data transmission through intelligent message routing.
Solution Approach 2:
The core network device performs preliminary routing decisions by determining the most suitable base station for each NAS message before the actual data transmission occurs. This preliminary action ensures that messages are directed to the optimal base station in advance, thereby maintaining high data transmission efficiency without requiring the UE to directly evaluate and access multiple base stations.
Data Source
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AI summary
The present invention provides a data transmission method and a device. The method includes: receiving, by user equipment UE, a first message sent by a core network device by using a first base station, where the first message includes information related to a second base station; and performing, by the UE, transmission of a non-access stratum NAS message with the core network device by using the first base station, and performing data transmission by using the second base station based on the information related to the second base station, where the NAS message is transmitted only by using the first base station. The NAS message between the user equipment and the core network device is transmitted by using only one base station, and the user equipment accesses, based on information that is sent by the core network device by using the base station and that is related to another base station, the another base station to perform data transmission. In this way, the user equipment can access different base stations to satisfy different data transmission requirements.