NFV Management Node Traffic Suppression During VIM Congestion
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Solution Overview
Problem
In network function virtualization (NFV), the Network Functions Virtualisation Orchestrator (NFVO) and Virtualised Network Functions Manager (VNFM) cannot monitor or manage the load of the Virtualised Infrastructure Manager (VIM), leading to increased load on VIM during congestion, which can prevent appropriate processing of Virtual Network Function (VNF) lifecycle management.
Innovation Solution
A management system with a first management node instructing a second management node to perform resource management for VNFs, and when the second management node is congested, the system suppresses communication traffic between the nodes to alleviate congestion and ensure proper resource management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the NFVO and VNFM continuously transmit processing requests to the VIM, then the VNF lifecycle management can be maintained, but the load on the VIM increases and processing becomes inappropriate during congestion
Solution Approach 1:
The VIM monitors its own load state and provides feedback to the NFVO and VNFM. When the VIM detects congestion, it transmits a notification to these management nodes, which then suppress further processing requests. This feedback mechanism ensures reliable VNF lifecycle management while preventing overload during congestion periods.
Solution Approach 2:
The system dynamically adjusts the transmission of processing requests based on real-time load conditions. The NFVO and VNFM transition between active request transmission and request suppression modes depending on the VIM's congestion state, allowing the system to adapt its behavior to current conditions and maintain both reliability and efficiency.
2Adaptability or versatility
If the VIM processes all incoming requests, then complete VNF lifecycle management is achieved, but the system becomes congested and unable to process requests appropriately
Solution Approach 1:
The system takes preliminary action by suppressing processing requests before the VIM becomes overloaded. When congestion is detected, the NFVO and VNFM proactively reduce request transmission, preventing further accumulation of unprocessed requests and avoiding system collapse. This anticipatory measure maintains complete VNF lifecycle management capability while preventing harmful congestion.
3Ease of operation
If communication traffic between management nodes is maintained at normal levels, then management operations continue smoothly, but the congested VIM cannot handle additional traffic
Solution Approach 1:
The VIM acts as an intermediary that monitors its own state and communicates with the NFVO and VNFM. This self-monitoring and notification mechanism automatically adjusts traffic flow without requiring complex external control systems, maintaining ease of operation while managing traffic appropriately during congestion.
Data Source
AI summary
A management system includes a first management node configured to instruct a second management node to perform processing for managing resources for a virtualised network function and the second management node configured to perform, in response to an instruction from the first management node, the processing for managing the resources for the virtualised network function. In the management system, when the second management node is in congestion, at least one of the first management node and the second management node performs processing for suppressing communication traffic between the first management node and the second management node.