wimax troubleshooting v2.0

8/13/2019 WiMAX Troubleshooting V2.0

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WiMAX Troubleshooting


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Content

Troubleshooting Principle

Alarm Management

OMC System Tools Signal Trace

Typical Case


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Network Architecture

CSN

AAA Server

NAP

A

G

W

R6tu

nnel

R6tunnel


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WiMAX troubleshooting principle

Firstly, Find out which NE have the trouble. (the

main NE include MS,RRU,BBU,AGW,AAA)

Software fault: the wrong version, configuration data

error, etc.

Hardware fault : the broken board, etc.

Installation quality : FE cable, fiber, feeder cable, etc.


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Alarm Management


Typical Case


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Alarm management 2-1

The Alarm Management is used to help operation &

maintenance personnel locate faults and recoverthem partly as soon as possible.

Alarm management show the active alarm, clear

alarm and notification.


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Alarm management 2-2

Alarm management show the active alarm, clear

alarm and notification.


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Appeed information 2-1

Double clip the active alarm, it show the append

information, useful for RRU troubleshooting.


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Appeed information 2-2

LinkStatusshow the RRU & MPXM link status, iflink broken, PA could be closed.

R6Statusshow the R6 link status, if link

broken ,PA could be closed.

10MLock10M clock status. When RRU is instarting status, clock is unlocked. PA could be

closed.

GPSStatuswhen GPS is out of service , PA could

be closed.

PACmd[0]show PA Tx0 is manual closed.

PACmd[1]show PA Tx1 is manual closed.


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Operation 2-1

Reset the board & subsystem


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Operation 2-2

Enable/Disable the PA


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Alarm Management


Typical Case


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System tools Useful tools in OMC.


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Service Analysis

Service analysis include the signaling trace, access,

service flow, release, hand off.


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RF Analysis Main function is RF control and Spectrum scan

checkCheck the RRU Tx preamble power in RF control.

Check the interference in Spectrum scan.


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Radio test

Main function is Terminal monitor.

It show the signal quality, modulation code, PC, HARQ, etc.


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System Info Main function is Running Info .

checkCheck system running message.Board CSIM, MPIM, WBPM, MPXM, WPTR

Subsystem OSS, DBS, SPS, OAM, CCS, BB, CBS


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Probe

checkCheck data record saved in the board.Check segment, terminal MAC address, QoS,

service flow record in MPIM board.

Check the AGW route in MPXM.

QoS Service TypeUGS-0RTVR-1NRTVR-2BE-3ERTVR-4.


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Version management 3-1

The version upgrade flow.

CPU Add Deliver active

Reset system

Boot

Add

Deliver Reset system


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Key word: version package

Xml file to record the version list


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Key word: auto check version


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Diagnose management 2-1

Diagnose the board running status.

Check the CPU usage


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Diagnose management 2-2

R6 link ping test from MPXM to GGLP.


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Content


Alarm Management


Typical Case


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Signal trace - SBC ucFailInd=34means Unknown BSID . AGW BSID

isnt the same as BS.


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SBC Fail

R6 link (BS AGW)

MPXM IP

R6 signal IP

Static router

Check the operator ID and AGW BSID


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Signal trace - PKM Authentication

UcAuthResult=0 means auth success. ucAuthResult=1 means auth fail.


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PKM fail

Check the use and password in AAA Check whether the AAA rejectbAuthResult=1

Check the NSP in AGW

Check the terminal authentication type (TTLS or TLS)

Check whether the certification expire Check the signal (bad signal lead to packet lost)

As the same time u need to check whether just one

terminal authentication fail.


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Signal trace - admission

Admission, BE user no need to admission.

dwCause=0 means admission success.


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Signal trace - DSA

DSA flow

ucConfirmCode=0 means DSA success.

dwCause0


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Admission & DSA fail

Check QoS profile in AAA

Check the modulation code in terminal

Admission control (ERTPS, UGS, RTPS)


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Signal trace - Release

1---DROPOFF_RLS; 2---EXCEP_RLS; 3---POWEROFF_RLS4---

IDLE_RLSIdle; 5---HANDSHAKE_RLS; 6---AGW_EXCEP_RLS7---HHODROP_RLS

dwCause0


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Alarm Management


Typical Case


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Case1: VSWR

The pa is abnormal.


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Case 2: GPS

GPS antenna feeder.


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Case 3: FTP low speed

check user profile from the AAA

check the segment channel bitmapuser

all subchannel or not.

check whether the service flow is the same

as configuration or not. check the signal from terminal monitor.

check the switch port duplex mode.

check the transmission capability. Check the FTP server and FE cable.


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AAA profile

Take UGS as example


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Subchannal configuration

Take 10M cofig as example


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Service type

QoS Service TypeUGS-0RTVR-1NRTVR-2

BE-3ERTVR-4


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Terminal monitor

Check the DL & UL signal


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Switch port

config Switch A (condition) Switch B (result)

A force 100M Full DuplexB auto adapt

100M Full Duplex 100M Half Duplex

A force 100M Full DuplexB force 100M Full Duplex

100M Full Duplex 100M Full Duplex

A auto adaptB force 100M Full Duplex

100M Half Duplex 100M Full Duplex

A auto adaptB auto adapt

100M Full Duplex 100M Full Duplex


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Transmission link

A typical link model

Microwave bandwidth

Switch port setting

Fiber pup bandwidth and cable


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FE cable

Check the cable,connecting the FTP

server, switch,

microwave, and BTS.

LAN test tool to check it.


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Time to question!


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