5G Deregistration Interworking Optimization
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Solution Overview
Problem
Current 5G and 4G/LTE network systems generate redundant deregistration notification messages when user equipment (UE) moves between networks, leading to excessive computation resource usage and latency due to unnecessary traffic in the 5G network.
Innovation Solution
Implement systems and methods that optimize UE deregistration from the 5G core network by using connectivity information from the 4G/LTE network to determine whether to inject deregistration notification messages into the 5G network, thereby reducing redundant message requests and CPU cycle burn.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If deregistration notification messages are generated when UE moves between 5G and 4G/LTE networks, then network interworking and mobility management are achieved, but redundant message requests increase computation resource usage and latency
Solution Approach 1:
The system performs preliminary registration status checking with the 5G core network before generating deregistration notification messages. When a UE registers with the 4G/LTE EPC, the MME first queries the 5G core network to determine if the UE is currently registered. Based on this preliminary check, the system only generates deregistration notifications when actually necessary, avoiding redundant messages and reducing latency while maintaining reliable network interworking.
2Adaptability or versatility
If deregistration notification messages are transmitted to the 5G core network, then UE mobility between networks is managed, but excessive computation resources are consumed processing redundant messages
Solution Approach 1:
The system implements a feedback mechanism where the MME queries the 5G core network registration status before transmitting deregistration notifications. This feedback loop allows the system to receive real-time information about UE registration state, enabling intelligent decision-making about whether to generate notifications. The feedback prevents wasteful computation resources from processing redundant deregistration messages while maintaining full adaptability for UE mobility management.
3Ease of manufacture
If redundant deregistration notification messages are processed, then network protocols are followed, but unnecessary traffic increases network burden
Solution Approach 1:
The invention extracts the essential deregistration notification function from the redundant message generation process. By removing the unnecessary step of always generating deregistration notifications and keeping only the conditional generation based on actual registration status, the system maintains full protocol compliance while dramatically reducing unnecessary network traffic. The MME extracts only the necessary notifications rather than transmitting redundant ones.
Data Source
AI summary
5G provides for interworking with the 4G/LTE networks, which provides for mobility of user equipment between the 5G and 4G/LTE networks. Mobility from 5G to 4G/LTE requires deregistering user equipment from the 5G core network (5GC) by communicating a deregistration notification from the Evolved Packet Core (EPC) to the 5GC. Systems and methods disclosed herein provide for an optimized deregistration process through avoidance of redundant deregistration notification traffic injected into the 5G network by utilizing 4G/LTE connectivity information to determine whether or not to inject deregistration notifications into the 5G network.