Network Slice Data Rate Control via PDU Session Monitoring
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Solution Overview
Problem
Current 5G wireless communication systems face challenges in effectively managing and controlling network slice data rates, which can lead to data rate exceeding maximum limits, resulting in potential network congestion and service degradation.
Innovation Solution
A method and apparatus for monitoring and controlling network slice data rates by obtaining slice policy information, including a maximum data rate, and transmitting policy enforcement requests to manage data rates, ensuring they do not exceed predefined limits, thereby preventing network overload.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If network slice data rate is increased to meet growing data traffic demand, then service capability is improved, but network congestion occurs and service quality deteriorates
Solution Approach 1:
The patent implements dynamic data rate limiting by adjusting the data rate parameter of PDU sessions based on slice policy constraints. The network node monitors the sum of data rates across multiple PDU sessions and applies rate limiting when the aggregate exceeds the slice's maximum data rate, thereby preventing network congestion while allowing high data rates within limits.
2Adaptability or versatility
If multiple PDU sessions are allowed to use network slice resources simultaneously, then service versatility is improved, but data rate control becomes difficult and network overload occurs
Solution Approach 1:
The patent employs a feedback mechanism where the network node continuously monitors the sum of data rates of all PDU sessions associated with a network slice and compares it against the maximum data rate constraint. When the monitored sum exceeds the limit, the node sends policy enforcement requests to reduce data rates, creating a closed-loop control system that automatically maintains rate compliance.
Solution Approach 2:
The patent establishes slice policy information including maximum data rate constraints before PDU sessions are established or data transmission begins. This preliminary configuration of rate limits enables proactive data rate control, preventing network overload before it occurs rather than reacting after congestion has developed.
Data Source
AI summary
The disclosure relates to a 5th generation (5G) or pre-5G communication system for supporting a higher data rate after a 4th generation (4G) communication system such as long term evolution (LTE). According to various embodiments, a method for operating a network node in a wireless communication system is provided. The method comprises obtaining slice policy information including a maximum data rate, monitoring a data rate of protocol data unit (PDU) sessions associated with the slice, determining whether a sum of data rates of PDU sessions associated with the slice exceeds the maximum data rate, transmitting, to a second network node, a policy enforcement request message for controlling the sum of data rates of the PDU sessions associated with the slice.