SMCCE Analytics for Fair Backoff Timer Distribution
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Solution Overview
Problem
The existing 3GPP LTE systems face a fairness issue in congestion control, where network nodes may provide varying backoff timers to different terminals, leading to unfair treatment during congestion, as they do not store information on the backoff timers provided, resulting in inconsistent application of congestion control.
Innovation Solution
The introduction of the Session Management Congestion Control Experience (SMCCE) analytics, where the Network Data Analytics Function (NWDAF) collects and analyzes data from User Equipment (UE) to provide statistics and predictions on congestion control experiences, enabling fairer distribution of backoff timers and congestion control mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the network node provides backoff timers to terminals for congestion control, then congestion control is applied, but the network node does not store information on the backoff timers provided, resulting in fairness problems between terminals
Solution Approach 1:
The patent implements a feedback mechanism where the network node stores backoff timer information and uses it to make informed decisions in subsequent congestion control scenarios. The network node retrieves previously provided backoff timer values and considers them when determining new backoff timers, ensuring that terminals receive consistent and fair treatment based on their historical congestion control experiences.
Solution Approach 2:
The patent introduces an intermediary information storage mechanism that bridges the network node and terminals. This intermediary stores the backoff timer information and provides it back to the network node, enabling the network to maintain awareness of previously provided backoff timers without requiring direct memory in the network node itself, thus ensuring fairness while maintaining system architecture integrity.
2Reliability
If the network node continuously provides backoff timers with long time values to specific terminals, then congestion control is applied to that terminal, but this creates unfairness compared to other terminals receiving short time values
Solution Approach 1:
The network node uses feedback from stored backoff timer history to adjust future backoff timer assignments. By reviewing previously provided backoff timer values, the network can identify patterns and ensure that terminals are not systematically assigned excessively long or short backoff timers, thereby balancing congestion control effectiveness with overall terminal access efficiency.
Solution Approach 2:
The patent dynamically adjusts the backoff timer parameter based on historical data and current network conditions. Instead of using fixed or arbitrary backoff timer values, the system modifies the backoff timer parameter according to the terminal's historical experiences and current congestion state, optimizing both congestion control and access efficiency.
Data Source
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AI summary
One disclosure of the present specification provides a method for performing, by means of an SMF, communication related to congestion control. The method may comprise the steps of: transmitting a request message requesting an SMCCE analytics to NWDAF; and in response to the request message, receiving a response message including SMCCE analytics information from the NWDAF.