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Airbridge BTS3606C CDMA Base Station
Product Description
About This Chapter
This topic describes the signal flows in the BTS. From the Abis interface to the Um interface,
the signals in the BTS form signal flows during transmission. The signal flows in the BTS are
the Abis traffic signal flow, Abis signaling signal flow, OM signal flow, and clock signal flow.
The signal flows in the BTS are shown in
mark different types of signal flows.
Figure 8-1 Signal flows in the BTS
BSC
BAM
The Abis traffic signals, Abis signaling signals, and OM signals are adapted and carried through
the asynchronous transfer mode (ATM)/IP protocols. The ATM/IP links over different interfaces
are provided by different physical links. The details are as follows:
Issue 03 (2008-02-25)
8
BCKM
MC
OMU
BCIM
CLK
Telnet
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd
Signal Flows in the BTS
Figure
8-1, where different types of lines are used to
RXD
S
RXM
CCPM
T
R
/
M
CECM
RXD
S
RXM
CCPM
T
/
R
CECM
M
8 Signal Flows in the BTS
SDFU
TX
SPAM
TXF
SDFU
TX
SPAM
TXF
Clock Signal
RF Singal
Signaling Signal
Traffic Signal
OAM Signal
Antenna
&
Feeder
Antenna
&
Feeder
8-1
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Summary of Contents for Huawei Airbridge BTS3606C
- Page 1 Airbridge BTS3606C CDMA Base Station Product Description 8 Signal Flows in the BTS Signal Flows in the BTS About This Chapter This topic describes the signal flows in the BTS. From the Abis interface to the Um interface, the signals in the BTS form signal flows during transmission. The signal flows in the BTS are the Abis traffic signal flow, Abis signaling signal flow, OM signal flow, and clock signal flow.
- Page 2 Airbridge BTS3606C CDMA Base Station 8 Signal Flows in the BTS Product Description The physical links over the Abis interface are E1/T1/FE links. The physical links between baseband subracks are cell buses. The CCPMs/CECMs are connected to the STDM through SFP cables.
- Page 3 Airbridge BTS3606C CDMA Base Station Product Description 8 Signal Flows in the BTS 8.1 Abis Traffic Signal Flow in the BTS This topic describes the Abis traffic signal flow in the BTS. The Abis traffic signals consist of voice service traffic signals, inband signaling signals, and data service traffic signals.
- Page 4 Airbridge BTS3606C CDMA Base Station 8 Signal Flows in the BTS Product Description The ATM cells or IP packets from the BSC are sent to the BCIM, which reassembles them, uses its own main control unit to process them, and sends them to the CCPM or CECM through the cell bus.
- Page 5 Airbridge BTS3606C CDMA Base Station Product Description 8 Signal Flows in the BTS Figure 8-2 OM signal flow in the BTS Antenna SDFU & Feeder CCPM BCKM SPAM CECM BCIM Antenna SDFU & Feeder CCPM SPAM CECM Telnet Clock Signal...
- Page 6 Airbridge BTS3606C CDMA Base Station 8 Signal Flows in the BTS Product Description The satellite receiver of the BCKM receives 1 pulse per second (PPS) synchronization signals from GPS and GLONASS satellites through the satellite antenna. Then, the CLKM processes the 1PPS signals to generate 2S and 16Fc clock signals (19.6608 MHz) required by the CCPM or CECM and outputs 2S and 10 MHz signals for testing.