User Manual
iSiteC BTS3601C CDMA Base Station
System Description
Chapter 3 System Function
3-8
I. Functions of physical layer and transmission layer on Abis interface
The physical layer of Abis interface adopts ATM UNI technology. The configuration of
User-to-Network Interface (UNI) is completed at the BTS that also provides the
timeslot configuration function.
Data link layer of Abis interface utilizes ATM. Signaling is adapted with AAL5 and
traffic is adapted with AAL2.
II. Channel resource management
BTS organizes channel resources with a resource pool. It is responsible for the
allocation, release and management of the channel resources.
III. Abis traffic link management
BTS is responsible for assigning traffic link on Abis interface.
IV. BTS logic O&M functions
BTS provides the following logic O&M functions:
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Resource status indication
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Cell configuration function
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Overhead message updating
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Cell breath control function
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Cell block/unblock function
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Radio measurement report function
V. Common channel processing
BTS is responsible for the establishment and release of common channels and
processing of common channel messages. The common channels include paging
channel, access channel, etc.
VI. Establishment and release of dedicated channel
BTS is also responsible for the establishment and release of dedicated channels.
VII. Traffic bearing
BTS processes Abis interface protocol, transmits the traffic channel data received
from the air interface to BSC, and transmits the traffic data that received from BSC on
the air interface.
