RAN Congestion Awareness Function for Application Server Notification
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Solution Overview
Problem
Network congestion in specific areas leads to service transmission delays, failed service bearer establishment, and inefficient use of network resources due to the application server's inability to perceive congestion status.
Innovation Solution
A congestion notification method where a network side device receives and forwards congestion status information from a Radio Access Network (RAN) congestion awareness function entity to the application server, enabling the server to adjust services accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the application server continues performing downlink data transmission without congestion awareness, then the network resource utilization increases, but service transmission delay increases and service quality deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where the RCAF entity monitors network congestion status and sends notifications to the application server. The server receives congestion status information and adjusts its data transmission behavior accordingly, creating a closed-loop control system that balances resource utilization with service quality.
Solution Approach 2:
The RCAF entity acts as an intermediary between the network infrastructure and the application server. It collects congestion information from the network side device and translates it into meaningful status notifications for the server, enabling the server to make informed transmission decisions without directly monitoring network conditions.
2Reliability
If the application server adjusts services based on congestion status, then service transmission quality improves, but system complexity increases due to additional congestion query and notification mechanisms
Solution Approach 1:
The patent extracts the congestion monitoring and notification function into a separate RCAF entity, independent from both the network side device and the application server. This modular approach allows the core transmission functionality to remain simple while adding congestion awareness capabilities through a dedicated component that handles query and notification operations.
3Loss of time
If congestion status information is continuously monitored and notified, then service adjustment timeliness improves, but network overhead and energy consumption increase
Solution Approach 1:
The patent implements periodic congestion status monitoring where the RCAF entity queries the network side device at regular intervals or triggered by specific events. This periodic approach ensures timely detection of congestion conditions while avoiding continuous monitoring overhead, balancing responsiveness with resource efficiency.
Data Source
AI summary
A congestion notification method includes receiving, by a network side device, a congestion status of a target network area sent by a radio access network (RAN) congestion awareness function (RCAF) entity, where the target network area is a network area involved in an application service provided by a target application server; and sending, by the network side device, the congestion status of the target network area to the target application server.