Table of Contents
Advertisement
User Manual
Airbridge cBTS3612 CDMA Base Station
R-FCH
R-SCCH
R-SCH
II. Physical channel configuration
On Um interface is defined series of physical channels, which are divided into
different types according to the channel features. Different RCs support different
channels.
1)
Forward physical channel
The configuration of forward physical channel is shown in Figure 4-11.
F-CACH
F-PICH
Figure 4-11 Forward physical channels
F-CACH (Forward Common Assignment Channel)
l
F-CACH is specially used for transmitting the assignment information in quick
response to the reversed channel, and provides the support for random access
packet transmission in the reversed link. F-CACH controls R-CCCH (Reverse
Common Control Channel) and F-CPCCH in Reservation Access Mode, and
provides the quick acknowledgement in power-controlled access mode. In addition,
it also provides congestion control function.
F-CPCCH (Forward Common Power Control Channel)
l
F-CPCCH is used in the system to support multiple R-CCCH and R-EACH (Reverse
Enhanced Access Channel) to perform power control.
Channel type
RC1
RC2
RC3
RC4
RC1
RC2
RC3
RC4
Forward CDMA channel
F-CPCCH
F-PICH
F-CCCH
F-TDPICH
F-APICH
F-ATDPICH
Channel rate (bit/s)
9600, 4800, 2400, or 1200
14400, 7200, 3600, or 1800
9600, 4800, 2700, or 1500 (20ms frames)
14400, 7200, 3600, or 1800 (20ms frames)
9600
14400
153600, 76800, 38400, 19200, or 9600 (20ms frame)
307200, 153600, 76800, 38400, 19200, or 9600 (20ms frame)
F-TCH
F-SYNCH
F-DCCH
F-FCH
4-17
System Description
4 System Function
F-BCH
F-PCH
F-QPCH
F-SCH
F-SCCH
F-PC
(RC3~5)
(RC1~2)
Sub-channel
Advertisement
Table of Contents
