GSM BSC Maintenance

HUAWEI TECHNOLOGIES CO., LTD.

All rights reserved

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Internal

OMD000201 GSM BSC Maintenance Console

ISSUE 4.0

HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

References

M900/M1800 Base Station Controller

Routine Operation Manual

M900/M1800 Base Station ControllerT

echnical Manual


Chapter 1 Checking Equipment StatusChapter 1 Checking Equipment Status

Chapter 2 Locating FaultsChapter 2 Locating Faults


Operations on Maintenance Console

Checking equipment status

Operation status of modules

Operation status of boards

CPU occupations status

Status of CCS7 links

Status of LAPD links

Status of circuits


Operation Status of Modules

Access: [Maintenance/Module State]

Functions: display the communication state

between the maintenance console and

each BM of the BSC

Results:

in normal conditions, module numbers

will be displayed.

If the communication is faulty, a * will be

placed before the module.


Operation Status of Boards

Access: [control/Equipment]

Functions: view and query board state and information, reset board

Results :

in normal conditions, boards on the interface are in grey, green

(active) and blue (standby).

if the board is faulty, color shown on the panel will change to red.

Caution: if you find a board is in red, first you should confirm it has been configured or not, then for GALM in AM you should check whether connectedalarmbox has been powered on.


Checking Equipment Status


Query MPU


Query GCKS


CPU Occupation Status

Access: [trace/occupation ratio]

Functions: by viewing CPU occupation ratio, the BSC load

condition (Normal, Overload and Congestion) can be known.

Results:

In normal conditions, the occupation status of CPU and

memories should be displayed in the system performance

tracing window. When the bar chart is blue, the status is

normal.

If the bar chart is yellow, the status is overloaded and red,

congested.


View CPU Usage and State of BM Modules


Status of CCS7 Links Access: [SS7 Maintenance/State Query]

Functions: query the signaling link state, destination state and r

oute state to ensure the interworking of inter-office SS7

Interface:

Module number

Link number


Query Input Parameters

Data configuration \ view data configuration work mode \

Module 0 \ Hardware \ [E3M Board property]


Query Result

In normal conditions


Status of LAPD Links

Access: [Control\LAPD Link Maintenance]

Functions: query LAPD link to check current link state

Interface:

Module number

Start link no, end link no



Data management\site\[site description table]---OML



Data management\local-office\[TRX configuration table]---RSL


Query Results

In normal conditions, the query result should be multi frame

establish state

If TEI has not allocate state, the link has not been configured; If

TEI has allocated state, the link has been configured, but board

is not inserted; if off-link state, the established link is

disconnected and system cannot operate at that time. Or the

link is configured and board is inserted, but they are not

connected to the BTS


GLAP Link Query Results


Circuit Status

Access: [ control\circuit\circuit state]

Functions: query the state of channel of TC, BIE and PBIE circuits

Interface:

Module number

Circuit type

Start channel, end channel


Query Results

In normal conditions, state should be uninstalled, idle and busy


Chapter 1 Checking Equipment StatusChapter 1 Checking Equipment Status

Chapter 2 Locating FaultsChapter 2 Locating Faults


Operations on Maintenance Console

Locating faults

Interface tracing

Signaling tracing

Switchover

Board resetting

Module resetting


Interface Tracing

Access: [trace\GSM interface trace]

Functions: trace messages on A-bis, Um and A interfaces in re

al time

interface:

Interface type

Module No.


A Interface Message Trace

Filter conditions:

connectionless message, DTAP message, BSSMAP

SCCP No.


A Interface Message Trace


A-bis Interface Message Trace

Filter conditions:

BTS number, TRX number, Channel number

Measurement report, wireless link layer management message, special channel management message, common channel management message, TRX management message


A-bis Interface Message Trace


Um Interface Message Trace

Filter conditions:

BTS number, TRX number, Channel number

Radio resource management message, MM mobility management

message, Call control and related Supplementary Services

message, Unrelated Supplementary Service message, SMS short

message


Um Interface Message Trace


Save Tracing Message


GSM Trace Review


Signaling Tracing

Access: [SS7 maintenance\SS7 message trace]

Functions: trace message of a signaling link, capture and save

all or partial message through the signaling link

Interface:

Message type

Filter

Parameter

Save to file


SS7 Message Trace


SS7 Trace Review


Switchover

Access: [control\immediate switchover]

Functions: when the active board is faulty or the data of

active/standby boards are inconsistent, if the boards have not

switched over automatically, it is required to switch over the

active and standby boards immediately, making the normal

board use the correct data and ensure the correctness of the

BSC operational data. After the active and standby boards are

switched over immediately, the original standby board will

become the active board while the original active board

become the standby board


Switchover

Interface

Switchover board type

Module number


Switchover


Board Resetting

Access: [control\equipment]

Functions: resetting operations are be performed when some

boards are faulty. Resetting results include “successful reset”,

“equipment fault”, ”uninstalled”, “the device can’t be reset” or

“unexecuted”

Caution:This operation requires the system setup authority. Do not reset a board unless it is necessary.


Board Resetting


Module Resetting

Access: [control\hierarchical reset]

Functions: mainly used to load some modified data that can not

be set online, or as a way of recovery when any problem

occurs during BSC running

Caution:Hierarchical reset operation requires system setting authority. This operation may affect system services. Do not perform this operation unless it is necessary.


Module Resetting Interface

Restart level Module number


In this course ,we have learned how to

Check equipment status

Locate faults

Trace interface

Switchover and reset boards

SummarySummary

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Thank You

GSM BSC Maintenance

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