SCTP Telecom Microservice Scale-Down With Session State Handover
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Solution Overview
Problem
Existing scale down operations for quasi-stateful applications in 5G networks, such as gNB-CU-CP and gNB-CU-UP, result in service disruptions for subscribers due to the lack of a seamless transition mechanism.
Innovation Solution
A method involving an internal controller that coordinates the distribution of existing session state and connection information among stateful telecom microservices, enabling a graceful scale down process to mitigate disruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If scale down operation is performed for stateful telecom microservices, then resource utilization is improved, but service disruption occurs for subscribers
Solution Approach 1:
The patent applies preliminary action by performing session state distribution from the first stateful telecom microservice to additional microservices before the scale down operation is completed. The internal controller coordinates this by sending scale down requests that trigger pre-distribution of connection and session information, ensuring that subscriber services can be seamlessly transferred without disruption when the original microservice is terminated or scaled down.
2Reliability
If session state is distributed among multiple microservices, then service continuity is maintained, but system complexity increases
Solution Approach 1:
The patent employs an internal controller as an intermediary that manages the complexity of session state distribution. The internal controller receives scale down triggers, sends coordinated scale down requests to stateful microservices, and monitors the distribution process. This intermediary approach centralizes the control logic, simplifying the overall system architecture while maintaining service continuity through automated session state transfer mechanisms.
Data Source
AI summary
Systems and methods are provided for telecom cloud scale down. In one embodiment, a method is provided comprising: deploying a coordinating node, which may be a CU-CP or CU-UP, in a microservices cloud infrastructure; receiving, at an internal controller at the coordinating node, a trigger request for scale down preparation; sending, from the internal controller, a scale down request to a first stateful telecom microservice; sending, from the first stateful telecom microservice, at least one existing session state distribution request to at least one additional stateful telecom microservice; distributing existing connection and session information to the at least one additional stateful telecom microservice; and sending, from the first stateful telecom microservice to the internal controller, a scale down preparation completion message, thereby performing telecom cloud scale down while mitigating disruptions to subscriber service. The method may further comprise terminating the first stateful telecom microservice.