Network Slice Registration with Cached Availability Checks
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Solution Overview
Problem
Existing wireless communication systems face challenges in managing user equipment (UE) registration with network slices efficiently, particularly in 5G systems, which are designed to support various services and network architectures, including IoT applications, without causing network overload.
Innovation Solution
A method and apparatus for managing UE registration with network slices by determining slice availability based on network slice policies and maximum UE counts, using access and mobility functions (AMF) to handle registration requests through multiple networks, ensuring efficient resource allocation and network management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the system allows multiple UEs to register with the same network slice through different networks (3GPP and non-3GPP), then the service coverage and accessibility are improved, but the network load and resource consumption increase
Solution Approach 1:
The system performs preliminary actions by maintaining registration status information and slice availability status in advance. When a UE sends a registration request, the AMF checks the stored registration status and slice availability rather than processing from scratch, enabling quick determination of whether to allow registration without immediately increasing network load
Solution Approach 2:
The system implements feedback mechanisms where the AMF monitors slice availability status and UE registration status continuously. When the maximum number of registered UEs for a slice is reached, the system provides feedback by setting the slice availability status to unavailable, which automatically prevents further registration requests for that slice, thus controlling network load dynamically
2Manufacturing precision
If the system checks slice availability for every registration request to ensure proper resource allocation, then the resource allocation accuracy is improved, but the registration processing time increases
Solution Approach 1:
The AMF performs preliminary checks by maintaining cached information about UE registration status and slice availability in advance. When a registration request arrives, the system first checks the stored status information before initiating full slice availability verification, thereby reducing the time required for processing while maintaining allocation accuracy
Solution Approach 2:
The system implements self-service mechanisms where the AMF automatically monitors and updates slice availability status based on the number of registered UEs. The system serves itself by automatically determining whether to accept or reject registration requests based on pre-established criteria (maximum UE count per slice), eliminating the need for complex real-time resource allocation checks for each request
3Measurement precision
If the system maintains detailed registration status information for each UE and network slice combination, then the network management accuracy is improved, but the memory consumption and system complexity increase
Solution Approach 1:
The system extracts and maintains only the essential registration status information (whether a UE is registered with a specific slice) and slice availability status (whether a slice can accept new UEs) in the AMF. By taking out only the critical information needed for registration decisions rather than storing all possible UE-slice combination details, the system achieves adequate network management accuracy with reduced memory consumption and lower system complexity
Data Source
AI summary
A method of a network function (NF) entity performing communication in a wireless communication system includes: in case that a first registration request of a user equipment (UE) for a slice is received at an access and mobility function (AMF) entity through a first network, receiving a first slice availability request message for the slice from the AMF entity; determining whether the slice is available for the UE, based on a network slice policy; and transmitting, to the AMF entity, a response message including information regarding slice availability of the UE according to the first registration request, wherein in case that a second registration request of the UE for the slice is received at the AMF entity through a second network, slice availability of the UE according to the second registration request is determined based on at least one of the network slice policy or the information regarding the slice availability of the UE according to the first registration request.