Network Slice Selection for 5G-4G Interworking
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Solution Overview
Problem
There is a need in the art to effectively provide service interworking between a 5G network system providing a network slice function and a 4G network system in a wireless communication system.
Innovation Solution
A method and device for supporting system interworking in a wireless communication system, including transmitting a request message for inter-system interworking, receiving a response message with information about other entities, and selecting one entity based on the response message.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If network slicing function is provided in 5G system, then service differentiation and efficiency are improved, but system complexity increases
Solution Approach 1:
The patent introduces a network slice selection function as an intermediary component that mediates between the 5G network slice system and 4G EPC system. This selection function receives network slice information from the 5G side, determines appropriate 4G target nodes, and facilitates seamless handover decisions, thereby managing system complexity through a dedicated coordinating entity.
Solution Approach 2:
The patent segments the interworking function by separating the network slice selection logic from the core network functions. The selection function operates as an independent module that handles slice-specific decisions, while the 4G EPC maintains its existing architecture. This segmentation allows the complex 5G network slicing capability to be integrated without overwhelming the entire 4G system.
2Reliability
If interworking between 5G and 4G systems is implemented, then service continuity is improved, but handover complexity increases
Solution Approach 1:
The patent implements preliminary action by pre-configuring 4G target nodes and establishing handover policies before actual handover occurs. The network slice selection function预先 determines suitable 4G EPC targets based on network conditions and slice requirements, so that when handover is needed, the process can proceed smoothly without complex real-time decisions.
Solution Approach 2:
The patent establishes feedback mechanisms where the network slice selection function continuously monitors network conditions, slice usage, and handover status. This feedback information is used to dynamically adjust handover decisions and target node selections, ensuring reliable service continuity while simplifying the handover process through automated adjustments.
3Productivity
If multiple 4G target nodes are considered for handover, then service optimization is improved, but selection time increases
Solution Approach 1:
The patent applies partial action by evaluating only the most relevant 4G target nodes based on pre-established criteria such as network load, slice compatibility, and geographic proximity. Instead of exhaustively analyzing all possible targets, the system uses prioritization mechanisms to focus on the top candidate nodes, achieving good service optimization with reduced selection time.
Solution Approach 2:
The patent changes the parameters used for target node selection dynamically based on current network conditions and slice requirements. The selection function adjusts evaluation criteria in real-time, weighing different factors (such as latency, throughput, or resource availability) differently depending on the specific slice type and network state, thereby optimizing selection speed and quality.
Data Source
AI summary
Disclosed is a method performed by a first entity in a wireless communication system, including transmitting, to a second entity, a first request message including information related to inter-system interworking, receiving, from the second entity, a first response message including information related to at least one other first entity in response to the first request message, and selecting one from among the at least one other first entity based on the first response message.