Iub Congestion 9442p

Level

Name 1 Phycial port

Bandwidth(default) 1G

2 Path bandwidth 100M

3 Logical port Note:

16M

1 if the CAC criteria not been satisfied ,it will be recored into IuB congestion for any leve 2 For the high IuB congestion & high plane packet loss site, the most possible reaso bandwidth or check MW peformance. 3 For high IuB congestion& high utilization and no plane packet loss site, please co

4 For high IuB congestion&low utilization and no plane packet loss site, please cons

Description Port property of GE port in RNC interface board (GOU, FG2), normally it is 1000Mbps and Full Duplex

This bandwidth is adjustablel. Normally we set the fixed value 100Mbps in IPPATH. This 100Mbps is sufficient for UMTS NodeB. So IPPATH bandwidth will not be a bottleneck in IUB ission control stage.

There is two main function for logical port: 1. IUB ission control; 2. IUB flow shaping and flow control. ied ,it will be recored into IuB congestion for any level CAC stage. h plane packet loss site, the most possible reason is due to OSN bandwidth limitation and MW is not st e. ilization and no plane packet loss site, please consider expand the actual Iub bandwidth.

zation and no plane packet loss site, please consider lower AF, if it still got IuB congestion failure, pleas

CAC The new bandwidth request
The new bandwidth request
The new bandwidth request
r any level CAC stage. sible reason is due to OSN bandwidth limitation and MW is not stable. please consider expand OSN please consider expand the actual Iub bandwidth.

lease consider lower AF, if it still got IuB congestion failure, please escalate to HW for investigating.

Optimization scenario If GE port become a bottleneck of IUB ission, then it is recommended to add a new GE connection and migrate some site from congested GE port to new GE port If there is IPPacket loss during BH which is due to Tx congestion, then IPPATH may be down(the available Path bandwidth =0) which will cause IUB ission failure. This failure will be recorded as IUB congestion in stats. It is recommended to expand Tx bandwidth (MW & OSN) to eliminate the IPPATH package loss. IuB bandwidth utilization rate and AF

and MW is not stable. please consider expand OSN

h.

on failure, please escalate to HW for investigating.