Microwave Link Bandwidth Notification for PTN Service Congestion
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Solution Overview
Problem
Current packet transport network (PTN) OAM functions are insufficient to notify bandwidth changes to endpoints, leading to service congestion due to inadequate bandwidth allocation adjustments in microwave links undergoing adaptive modulation.
Innovation Solution
A method for a network node attached to a microwave link to obtain current link bandwidth information, determine corresponding service bandwidth using a preset mapping relationship, and transmit this information to the endpoint of the service connection, allowing the endpoint to adjust its service policy and prevent congestion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If PTN OAM functions use general operations only, then device complexity is reduced, but bandwidth information cannot be notified to endpoints causing service congestion
Solution Approach 1:
The patent implements a feedback mechanism where the network node monitors microwave link bandwidth in real-time and notifies endpoints of bandwidth changes through OAM messages. This allows endpoints to adjust their traffic control policies dynamically based on current link conditions, preventing service congestion while maintaining relatively simple device architecture.
Solution Approach 2:
The endpoint devices are empowered to autonomously adjust their own traffic control policies based on bandwidth information received from the network node. This self-service approach eliminates the need for complex centralized control mechanisms while ensuring proper bandwidth management and preventing congestion.
2Adaptability or versatility
If microwave link performs adaptive modulation, then bandwidth adaptability is improved, but bandwidth information cannot be notified to endpoints leading to congestion
Solution Approach 1:
The patent establishes a feedback loop where the network node continuously monitors the microwave link's adaptive modulation state and bandwidth capacity, then communicates this information to endpoints via OAM messages. This enables endpoints to synchronize their traffic control with the actual link capacity, maintaining optimal bandwidth utilization while supporting adaptive modulation.
Solution Approach 2:
The network node acts as an intermediary between the microwave link and endpoint devices. It translates the physical layer adaptive modulation changes into network-layer bandwidth information that endpoints can understand and act upon, bridging the gap between link-layer adaptability and network-layer traffic control.
3Device complexity
If endpoints control service traffic according to bandwidth before adaptive modulation, then device complexity is reduced, but service congestion occurs due to outdated bandwidth information
Solution Approach 1:
The network node proactively notifies endpoints of bandwidth changes before congestion can occur. By providing advance warning of capacity changes, endpoints can adjust their traffic control policies in advance, preventing congestion rather than reacting to it, thereby maintaining high service transmission efficiency with minimal endpoint complexity.
Data Source
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AI summary
The present invention relates to the field of communication technologies, and discloses a method for notifying bandwidth information, a method for processing a service, a network node, and a communication system. The method for notifying bandwidth information includes: obtaining current link bandwidth information of a microwave link; determining, according to a mapping relationship between link bandwidth information and service bandwidth information, corresponding to the current link bandwidth information, service bandwidth information that is allocated to a service connection on which the microwave link is located; and transmitting the allocated service bandwidth information to an endpoint of the service connection through the service connection, so that the endpoint of the service connection adjusts a service policy according to the allocated service bandwidth information. Through the present invention, an endpoint of a service connection on which a microwave link is located may obtain bandwidth information that is allocated to the service connection by the microwave link corresponding to current bandwidth information.