Core Network Node Congestion Control via UE Identifier Sharing
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Solution Overview
Problem
Current mobile communication systems face challenges in effectively managing congestion, particularly in LTE networks, which can lead to service delays due to authentication and security processes during service switches.
Innovation Solution
The proposed solution involves a method and device for a core network node to acquire and share identifiers of user equipment (UE) located in congested cells, enabling optimized traffic processing. Additionally, pre-delivery of CS security key-related information to CS CN nodes reduces the need for separate authentication procedures during circuit-switched fallback (CSFB) processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If authentication and security processes are performed during service switches in LTE networks, then service reliability is improved, but service delay increases
Solution Approach 1:
The patent applies preliminary action by pre-establishing authentication contexts and security parameters before service switches occur. The network node stores authentication information and security keys in advance, so when a service switch is needed, the authentication process can be skipped or accelerated, reducing service delay while maintaining reliability.
2Reliability
If congestion control mechanisms are implemented in mobile communication systems, then network reliability is improved, but device complexity increases
Solution Approach 1:
The patent introduces a network node as an intermediary that handles congestion control functions. This node receives congestion information from base stations, manages UE identification, and coordinates with core network nodes to implement congestion control policies. By centralizing these functions in a dedicated intermediary node, the complexity is organized and managed more effectively rather than being distributed across all network elements.
3Productivity
If UE identification processes are performed to manage congestion, then congestion management effectiveness is improved, but processing time increases
Solution Approach 1:
The patent applies preliminary action by pre-identifying UEs and establishing their authentication contexts before congestion occurs. When congestion is detected, the network node already has UE identification information and authentication parameters ready, allowing rapid congestion control actions without performing full identification and authentication processes from scratch, thus reducing processing time while maintaining effectiveness.
Data Source
AI summary
The present disclosure relates to a method and a device for controlling congestion in a mobile communication system. A method for controlling congestion of a network node according to the present disclosure comprises the steps of: receiving congestion-related information from at least one base station; transmitting a user equipment information request message for making a request for information on a piece of user equipment corresponding to the base station to a mobility management entity; receiving a user equipment information response message including the information on the user equipment corresponding to the base station from the mobility management entity; and transmitting the information on the piece of user equipment corresponding to the base station to another core network node.