Network Slice Allocation in 5G Registration Area Management
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Solution Overview
Problem
In 5G communication systems, terminal devices face limitations in using network slices due to restrictions on the types and quantities of network slices allowed by the core network, which hinders the establishment of PDU sessions.
Innovation Solution
A communication method where a terminal device sends registration requests with specific network slice information to a core network device, allowing the core network to reallocate registration areas and expand the supported network slices, thereby enabling more PDU sessions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the core network device allocates a registration area to the terminal device, then the terminal device can access network services, but the terminal device is limited in the types and quantities of network slices that can be used
Solution Approach 1:
The patent applies dynamics by making the registration area configuration adaptive rather than static. The core network device dynamically adjusts the registration area based on the terminal device's capabilities and network conditions, allowing the terminal to access a broader range of network slices. This dynamic adjustment resolves the contradiction by enabling versatile network slice usage while maintaining reliable service access through intelligent resource allocation.
Solution Approach 2:
The patent changes the parameters of the registration area configuration to resolve the contradiction. By modifying the registration area parameters to include multiple tracking areas with different network slice support characteristics, the system enables the terminal device to access diverse network slices while maintaining reliable connection management. This parameter change allows both versatility in network slice selection and reliability in service establishment.
2Adaptability or versatility
If the core network device limits the network slice information in the registration area, then the network management is simplified, but the terminal device cannot meet diverse communication requirements
Solution Approach 1:
The patent applies segmentation by dividing the registration area into multiple tracking areas, each with specific network slice support characteristics. This segmentation allows the system to provide diverse network slice options to meet various communication requirements while managing complexity through structured organization. Each tracking area can be independently configured and managed, resolving the contradiction between versatility and complexity.
Solution Approach 2:
The patent applies local quality by assigning different network slice support characteristics to different tracking areas within the registration area. This allows the system to provide tailored network slice availability in different locations, enabling the terminal device to access diverse communication services while maintaining manageable configuration complexity through localized differentiation.
3Productivity
If the terminal device requests specific network slice information, then the terminal device can establish required PDU sessions, but the core network device must perform more complex processing
Solution Approach 1:
The patent applies preliminary action by pre-configuring the core network device with multiple tracking areas that have different network slice support characteristics before the terminal device makes requests. This preliminary configuration allows the core network device to efficiently process terminal device requests and quickly determine appropriate network slice allocations, resolving the contradiction between productivity and processing complexity.
Solution Approach 2:
The patent applies feedback mechanisms where the core network device provides feedback information about available network slices and registration area configurations to the terminal device. This feedback loop enables efficient PDU session establishment by allowing the terminal device to make informed requests based on actual network availability, reducing the processing complexity required by the core network device while maintaining high productivity.
Data Source
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AI summary
Embodiments of this application disclose a communication method, a terminal device, and a core network device. The method includes: The terminal device sends, through a radio access network device, a registration request message including first network slice information to the core network device. The first network slice information is information about a first network slice corresponding to a PDU session that the terminal device expects to establish. The terminal device receives, through the radio access network device, a registration accept message that is sent by the core network device and that includes information about a first registration area allocated to the terminal device and second network slice information, the second network slice information is information about a second network slice that is allowed to be used by the terminal device in the first registration area, and the second network slice information includes the first network slice information. According to this application, a requirement that the terminal device performs communication by using a network slice can be better met.