Signaling Concentrator for LTE 5G Storm Reduction
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Solution Overview
Problem
The flat architecture of LTE and 5G networks makes them vulnerable to signaling storms, where heavy traffic reduces signaling capacity, leading to network overload and failures, as the core network directly handles all signaling traffic without the shielding effect of a Radio Network Controller (RNC) present in 3G networks.
Innovation Solution
Implementing a signaling concentrator that processes and prioritizes signaling messages from multiple radio access network nodes, using user equipment profiles and configuration information to determine whether to drop, provide, or delay messages, thereby mitigating signaling storms by managing the load and preventing network overload.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a flat architecture is used in LTE and 5G networks to eliminate the RNC, then network simplicity and direct core network connectivity are improved, but signaling capacity and network reliability deteriorate due to increased signaling load on core network nodes
Solution Approach 1:
A signaling concentrator is introduced as an intermediary node between radio access network nodes and core network nodes. This concentrator aggregates and processes signaling messages before forwarding them to the core network, thereby protecting core network nodes from direct signaling storms while maintaining the flat architecture's simplicity.
2Device complexity
If core network nodes handle all signaling traffic directly, then network simplicity is maintained, but network reliability deteriorates during signaling storms when heavy traffic reduces signaling capacity
Solution Approach 1:
The signaling concentrator acts as a protective intermediary that sits between radio access network nodes and core network nodes. It absorbs and manages signaling traffic spikes, preventing direct impact on core network nodes and ensuring continuous service during signaling storms.
Solution Approach 2:
The signaling concentrator performs preliminary processing and filtering of signaling messages before they reach the core network. By preparing and prioritizing messages in advance, it prevents overwhelming the core network during signaling storms and maintains service continuity.
3Productivity
If signaling messages are processed at line rate, then signaling capacity is improved, but device complexity increases due to the need for sophisticated message prioritization and dropping rules
Solution Approach 1:
User equipment profiles and prioritization rules are prepared and stored in advance at the signaling concentrator. When signaling storms occur, the system queries these pre-configured profiles to quickly determine message handling actions, enabling line-rate processing without real-time complex decision-making.
Solution Approach 2:
The signaling concentrator autonomously applies pre-configured prioritization rules and dropping policies to incoming signaling messages. This self-service approach eliminates the need for complex external control systems and enables high-speed automated message processing based on stored profiles.
Data Source
AI summary
A method for signaling storm reduction is disclosed, comprising concentrating a plurality of signaling messages from a radio access network node to a core network node at a signaling concentrator; and processing the plurality of signaling messages with a mobile device identifier rule, at a rate equal to or greater than a line rate of a link from the radio access network to the signaling concentrator, wherein processing the plurality of signaling messages further comprises determining whether to drop each of the plurality of signaling messages.