MME Overload Prediction and UE Reconnection Control
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Solution Overview
Problem
In mobile communication systems, overload conditions lead to inefficiencies as multiple User Equipments (UEs) connect to a Mobility Management Entity (MME), causing network congestion, and existing methods to manage this congestion are inadequate in balancing the load effectively.
Innovation Solution
The method involves predicting the duration of an overload and determining a reconnection type for User Equipments (UEs), which includes a wait time type, extended wait time type, and MME reselection type, to manage connections and balance load by restricting reconnection attempts based on the predicted overload duration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If multiple UEs connect to a single MME, then connection speed is improved, but network overload occurs
Solution Approach 1:
The patent segments the MME pool into multiple entities and distributes UEs across them. When overload is detected in a specific MME, the system redirects new UE connection requests to other MMEs in the pool, thereby segmenting the load and preventing single-point congestion while maintaining fast connection speeds.
Solution Approach 2:
The patent introduces an intermediary mechanism (MME selection logic) that mediates between UE connection requests and MME resources. This intermediary evaluates the current state of MMEs and directs UEs to appropriate targets, preventing direct overload while maintaining efficient connections.
2Reliability
If connection blocking is implemented to reduce overload, then network stability is improved, but connection time increases
Solution Approach 1:
The patent implements dynamic MME selection based on real-time overload conditions. Instead of static blocking, the system dynamically adjusts connection routing - allowing fast connection when MMEs are available and redirecting to alternative MMEs when overload is detected, thereby maintaining both stability and speed.
Solution Approach 2:
The patent changes the parameter of MME selection criteria based on system state. When overload is detected, the selection parameter shifts from 'first available MME' to 'least loaded MME', dynamically adjusting connection behavior to balance stability and speed without fixed blocking.
3Device complexity
If simple overload blocking is used, then implementation complexity is reduced, but load balancing effectiveness decreases
Solution Approach 1:
The patent implements a feedback mechanism where MMEs report their operational status and load conditions back to the connection establishment logic. This feedback enables intelligent load distribution decisions, improving balancing effectiveness while keeping the implementation relatively simple through status-based routing.
Solution Approach 2:
The patent applies partial action by implementing load balancing only for new connection requests rather than existing connections. This selective approach provides effective load balancing where needed without adding excessive complexity to the entire system, focusing resources on the most critical balancing point.
Data Source
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AI summary
The present invention comprises: a first standby method including a mobility management entity (MME) in a wireless communication system that includes predicting an overload durating time when an overload duration time that is predicted, transmitting to an eNodeB information on the reconnection method of the UE that is decided, wherein the plurality of reconnecton methods represent methods for the UE attempting reconnection with the MME after a second standby tume that is logner than the first standby time; and an MME reselectoin method for the UE attemplting the reconnectoin with an MME which is different from the MME.