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Airbridge cBTS3612-450 12-carrier CDMA Base Station
IV. Route information configuration error
The OML in a base station bridges two IP gateways, one being MPU of BSC
switching frame and the other being MUX of BSC BM frame. And the uplink and
downlink route table information are different from each other. If any gateway is
configured with wrong information, the OML will fail to be established in a base station.
What is typical is that TCP connection of an OML cannot be established after the
base station BOOTP request has succeeded. For such a case, please check in turn
the route information of the above-mentioned chains. First check the route
information of BAM to see whether it can correctly connect with the MPU of a
switching frame. Then, check the route inforamtion of MUX to see whether it can
connect downward with a base station and upward with a BAM. If the route
configuration is wrong, then modify the route configuration of the switching frame and
the MUX route data of BSC.
V. Related data configuration error of a far end OMC
During the OML establishment in a base station, the far end OMC acts as both
BOOTP Server and TCP Server. During the base station BOOTP, the OMC is
required to configure local BOOTP related information based on the data configured
in BSC. And this group of BOOTP information is required to be unique and consistent
with the data configured in BSC.
If an OMC is configured with wrong BOOTP information, the MAC field contained in
BOOTP request packet of a base station will not correspond to the BOOTP
information configured in OMC. And this results in failed BOOTP request of a base
station and an OML cannot be established.
Solution: Query the BOOTP information of this base station at the far end OMC,
compare it with the data configured in BSC and modify those inconsistent ones.
VI. Far end OMC fault
During the OML establishment in a base station, the far end OMC acts as both
BOOTP Server and TCP Server. Therefore, any far end OMC fault may lead to the
OML fautl of the base station. Possible OMC faults include:
1)
BAM halts or BAM process is not started. In this case, it is necessary to restart
BAM or start a BAM process.
2)
The loading process of BAM is abnormal. In this case, it is necessary to restart
the loading process of BAM.
3)
The low layer communication process (Exchange Server) of BAM is abnormal. In
this case, it is necessary to restart it.
5.2 Abis Signaling Link Fault
5.2.1 Description of Fault
When a base station is in service, the Abis signaling link between the base station
and BSC cannot be established or broken link occurs to the running base station. And
you can observe at the OMC alarm console that the "Abis signaling link fault" alarm
occurs.
03Q-0112-20020720-120
5 Signaling Link Fault
5-2
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