4G Strategy: Automatic Congestion Handling

Fact Finding:

LTE network load increases significantly at major events, such as sporting events, congregations, and parades. In severe scenarios, network congestion may occur, causing network performance and user experience to deteriorate

Pro :

•enables the eNodeB to adaptively handle network congestion

•Simplifies service guarantee a reduces manpower costs in heavy traffic scenarios

Cons :

Almost no impact

Execution Selection Criteria :

trial on a big event where nearby site may congested

Analysis:

When the proportion of users with small-packet transmission (such as SRBs, TA packets, and heartbeat packets) increases in scheduling, PDCCH CCEs are very likely to become a resource bottleneck. (User_Spec_Occupy_Rate>x)

That is, PDCCH CCEs are nearly exhausted but PRBs are still sufficient.

(DL_PRB_Utilizaation_Rate>x)

This is because, in scheduling, users with small-packet transmission assigned high scheduling priorities consume the same number of PDCCH CCEs but fewer PRBs than users with large-packet transmission do. Automatic Congestion Handling is designed to reduce the consumed PDCCH CCEs and increase the utilization of PDCCH CCEs and PRBs, thereby improving network performance and user experience.

 

Parameter Setting :

MOC	4G Parameter	Value	Remarks
ENodeBAlgoSwitch	IOptAlgoSwitch= ACHSwitch	1	Switch to activate ACH Switch