The value of this parameter must be consistent with that on the MSC.
CIC No.
This parameter affects the coverage area. If this parameter is set to a higher value, the actual coverage area of the network becomes small;
if this parameter is set to a lower value, call drops are likely to occur because of invalid access or too weak access signals, thus decreasing the success rate of BSS call setup.
Random Access Error Threshold
This parameter affects the coverage area. If this parameter is set to a higher value, the actual coverage area of the network becomes small;
if this parameter is set to a lower value, call drops are likely to occur because of invalid access or too weak access signals, thus decreasing the success rate of BSS call setup.
RACH Busy Threshold
This parameter affects the coverage area. If this parameter is set to a higher value, the actual coverage area of the network becomes small;
if this parameter is set to a lower value, call drops are likely to occur because of invalid access or too weak access signals, thus decreasing the success rate of BSS call setup.
RACH
Min.Access Level
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This function is implemented in the BSC6000V900R003 and later versions.
This function enables dynamic assignment of Abis timeslots to more efficiently utilize the Abis link resources; however, assignment may fail because of congestion on the Abis links. This function may decrease the CSSR and the BSS CSSR.
Flex Abis
When this function is enabled, the BSC initiates a re-assignment procedure after receiving the failure indication of the TCH assignment on the Um interface. This function can be used to increase the success rate of TCH assignment, thus increasing the CSSR and the BSS CSSR. By default, this function is enabled.
TCH re-assignment
When SDCCHs are insufficient, this function can be enabled to convert some TCHs into SDCCHs to increase the success rate of immediate assignment, thus increasing the BSS CSSR. By default, this function is enabled.
SDCCH dynamic adjustment
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z
Paging Success Rate
z
SDCCH Availability
z
SDCCH Congestion Rate
z
Immediate Assignment Success Rate
z
SDCCH Call Drop Rate
z
TCH Availability
z
TCH Congestion Rate
z
TCH Assignment Success Rate
z
TCH Call Drop Rate
z
Handover Success Rate
z
Success Rate of Call Setup
z Call Setup Delay
z
Call Complete Success Rate
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call and the setup of the call.
A high value of this counter severely affects user experience.
This counter is measured in drive tests. The value of this counter is the time required in setting up an end-to-end call by the MS in the radio network.
Call Setup Delay is the average setup time of multiple successful calls. You need to conduct multiple dialing tests.
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z
Classification
Call Setup Delay is measured in the following cases:
MS to PSTN: Average interval between the transmission of the CHANNEL REQUEST message from the MS and the reception of the ALERTING message sent from the MSC.
MS to MS: Average interval between the transmission of the CHANNEL REQUEST message from the calling MS and the reception of the ALERTING message sent from the MSC.
PSTN to MS: Average interval between the transmission of the PAGING message from the MSC and the transmission of the ALERTING message sent from the MS to the MSC.
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SABM
Measurement Point in the procedure of originating call establishment (early assignment)
B-A:
MS to MS Call Setup Delay MS to PSTN Call Setup Delay
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MS BTS BSC MSC
Channel Request
Channel Required Channel Active Channel Active Immediate Assignment CommandACK
SABM
Measurement Point in the procedure of destination call establishment (early assignment)
D-C:
PSTN to MS Call Setup Delay
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CIPH MODE CMP
4097 Uplink ASS CMP->downlink Alerting
160.8 Uplink EST IND->uplink ASS CMP
256.3 Downlink ASS CMD->uplink EST IND
82.1 Uplink CHAN ACT ACK->downlink ASS CMD
8.8 Downlink CHAN ACT->uplink CHAN ACT ACK
814.9 downlink Call Proceeding->downlink CHAN ACT
85.3 Uplink Setup->downlink Call
Proceeding
240 Uplink CIPH MODE CMP->downlink Setup
80.2 Uplink AUTH RSP->downlink CIPH MODE CMD
1070.2 Downlink AUTH REQ->uplink AUTH RSP
104 Uplink EST IND->downlink AUTH REQ
230.5 Downlink IMM ASS CMD->uplink EST IND（CM Service REQ）
14.5 Uplink CHAN ACT ACK->downlink IMM ASS CMD
9.6 Downlink CHAN ACT->uplink
CHAN ACT ACK
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