User Manual
iSiteC BTS3601C CDMA Base Station
System Description
Chapter 1 System Overview
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Overhead message updating: With this function, BSC configures or update
overhead message to BTS.
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Cell breath control function.
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Cell blocking function.
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Radio measurement report function.
2)
Common channel management function
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)
Dedicated channel setup and release function
This procedure 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, including IS95-FCH, 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:
For softer handoff, only one AAL2 link is allocated on Abis interface.
4)
Traffic channel bearing function
BTS needs to process Abis interface frame protocol. It transmits the data received
from the reverse traffic channel on the air interface to BSC, and transmits the data
from BSC through the forward traffic channel on the air interface.
Traffic channel bearing procedure also performs the 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 function
Abis interface suppor ts various power controls. Power control is performed through
parameter configuration. Power control falls into four 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.
