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User Manual
Airbridge cBTS3612 CDMA Base Station
Cell breath control function.
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Cell blocking function.
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Radio measurement report function.
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2) Common channel management procedure
Paging channel management procedure: it is used to transmit paging channel
messages from BSC to MSs through Abis interface.
Access channel management procedure: it is used to transmit access channel
messages received on the access channel of BTS to BSC through Abis interface.
3) Procedure of dedicated channel setup and release
It is used to control the setup and release of dedicated radio channel and Abis
interface terrestrial channel.
Abis interface supports the setup and release of various dedicated channels
specified in IS95A/B and cdma2000 1X, specifically
IS95-SCCH, IS2000-FCH, IS2000-DCCH and IS2000-SCH.
Each radio channel is allocated with one AAL2 link on Abis interface to bear user
traffic data.
Caution:
Softer handoff is only allocated with one AAL2 link on Abis interface.
4) Traffic channel bearing procedure
BTS needs to process Abis interface frame protocol, to transmit the data received
from the reverse traffic channel on the air interface to BSC and the data from BSC
through the forward traffic channel at the air interface.
Traffic channel bearing procedure also performs functions such as AAL2 traffic
matching, time adjustment of traffic data frame, reverse outer loop power control
adjustment and forward power control adjustment.
5) Power control
Abis interface supports various power controls. Power control is performed through
parameter configuration. Power control falls into 4 types: quick forward closed-loop
power control, slow forward closed-loop power control, quick reverse closed-loop
power control and reverse open-loop power control.
1-17
System Description
1 System Overview
including
IS95-FCH,
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