Network Slice Instance Selection for Session Continuity
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Solution Overview
Problem
In 5G communications, user equipment experiences session disruption when moving between different network slice instances due to the inability to maintain the same network slice type and instance, leading to deteriorated user experience.
Innovation Solution
A method is introduced where user equipment obtains and stores information about the initial network slice type and instance before movement, allowing it to request the same network slice instance after movement, ensuring session continuity by selecting an appropriate Access and Mobility Management Function (AMF) network element that supports the required slice type and instance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the core network selects a network slice instance based only on network slice identification information, then different service requirements can be met, but session continuity is lost when user equipment moves
Solution Approach 1:
The patent applies preliminary action by having the user equipment store the network slice instance identification information before movement occurs. When the user equipment moves to a new location, it uses this pre-stored information to request the same network slice instance, thereby maintaining session continuity without requiring re-selection during the movement process.
Solution Approach 2:
The patent uses copying by having the user equipment copy and store the network slice instance identification information from the initial selection. This copied information is then used in the new location to request the same network slice instance, ensuring that the session is maintained across different geographical locations.
2Reliability
If the user equipment requests the same network slice instance after movement, then session continuity is maintained, but the solution requires additional information storage and management
Solution Approach 1:
The patent applies self-service by having the user equipment autonomously store and manage its own network slice instance identification information. The user equipment independently uses this stored information to request the same network slice instance after movement, without requiring complex network-side coordination or additional management infrastructure.
3Adaptability or versatility
If different network slice instances are deployed for different services, then service differentiation is achieved, but user experience deteriorates during movement
Solution Approach 1:
The patent applies continuity of useful action by ensuring that the network service provided to the user equipment remains continuous during movement. By using the stored network slice instance identification information to request the same instance after movement, the patent maintains uninterrupted service delivery, preventing user experience deterioration while still supporting service differentiation through multiple network slice instances.
Data Source
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AI summary
This application relates to the field of wireless communications technologies, and provides a network slicing-based communication method, including: receiving, by a radio access network device, a registration request from user equipment, where the registration request includes first information and second information, the first information is used to indicate a type of a first network slice, and the second information is used to identify a first network slice instance in the first network slice; determining, by the radio access network device, an access and mobility management function network element based on the type of the first network slice and the first network slice instance; and sending, by the radio access network device, the registration request to the access and mobility management function network element, where the first information and the second information are used for network slice instance determining. According to the solution provided in the embodiments, after moving, the user equipment may select and use a network slice instance that is the same as that used before the user equipment moves, so that a session before the user equipment moves is not interrupted, thereby improving user experience.