01-11 Signal Flow Of The Bts3012
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BTS3012 Product Description(for 18TRX)
11
11 Signal Flow of the BTS3012
Signal Flow of the BTS3012
About This Chapter The BTS3012 signal flow is associated with the traffic and signaling of the BTS. The BTS3012 signal flow consists of the DL traffic signal flow, UL traffic signal flow, signaling processing signal flow, and signal flow for cabinet groups. 11.1 DL Traffic Signal Flow of the BTS3012 This topic describes the DL traffic signal flow of the BTS3012. The DL traffic signal flow refers to the user data that is sent from the BSC to the MS through the BTS3006C. In the BTS3012, the DTMU, DTRU, and DDPU (DFCU or DFCB) work together to process DL traffic signals. 11.2 UL Traffic Signal Flow of the BTS3012 The UL traffic signal flow sends user data from the MS to the BSC through the BTS3012. In the BTS3012, the DDPU (DFCU or DFCB), DTRU, and DTMU work together to process UL traffic signals. 11.3 Signaling Flow of the BTS3012/BTS3012AE The signaling of the BTS3012/BTS3012AE refers to the signaling on the Abis interface. The DTMU serves as the control part and works with the DTRU and DDPU (DFCU or DFCB) to process the signaling. 11.4 Signal Flow of BTS3012 Cabinet Groups The signal flow of BTS3012 cabinet groups refers to the signal flow between the main cabinet group and the extension cabinet groups. The signal flow of cabinet groups involves clock signals and control signals.
Issue 02 (2007-08-15)
Huawei Technologies Proprietary
11-1
BTS3012 Product Description(for 18TRX)
11 Signal Flow of the BTS3012
11.1 DL Traffic Signal Flow of the BTS3012 This topic describes the DL traffic signal flow of the BTS3012. The DL traffic signal flow refers to the user data that is sent from the BSC to the MS through the BTS3006C. In the BTS3012, the DTMU, DTRU, and DDPU (DFCU or DFCB) work together to process DL traffic signals. Figure 11-1 shows the DL traffic signal flow. Figure 11-1 DL traffic signal flow Um 9 MS
DDPU/DFCU/DFCB 8
8
Antenna system
D T R U 7 DTRB 5 6 ECMB 5
5 D T R U
4
D C S U
D T M U
D C C U 3
DCTB 2 D E L C
1
Abis
BSC
The DL traffic signal flow is as follows:
11-2
1.
The BSC sends E1 signals to the DELC through E1 cables.
2.
The DELC provides lightning protection for the received E1 signals, and then sends the E1 signals to the DCTB.
3.
The DCTB sends the E1 signals to the DCCU through the TOP signal cable, which connects the DCTB to the DCCU (or DSCU).
4.
The DCCU sends the E1 signals to the DTMU through the ECMB. Huawei Technologies Proprietary
Issue 02 (2007-08-15)
BTS3012 Product Description(for 18TRX)
11 Signal Flow of the BTS3012
5.
On receiving the signals, the DTMU converts the E1 signals through the data bus (DBUS). The DTMU also assigns the data based on the data configuration on the OML. Then, the signals are sent to the DCSU and the DTRUs in DTRU subrack 0 through the ECMB.
6.
The DCSU sends the signals to the DTRB in DTRU subrack 1 through the signal cable between the DCSU and the DTRB.
7.
The DTRB sends the signals to the DTRUs in DTRU subrack 1.
8.
After receiving the signals, the DTRUs in the two DTRU subracks perform digital filtering, up conversion, and filter amplification, and then send the signals to the DDPU (DFCU or DFCB).
9.
The duplexer in the DDPU (DFCU or DFCB) filters the signals from the DTRU, and then transmits the signals through the antenna subsystem.
11.2 UL Traffic Signal Flow of the BTS3012 The UL traffic signal flow sends user data from the MS to the BSC through the BTS3012. In the BTS3012, the DDPU (DFCU or DFCB), DTRU, and DTMU work together to process UL traffic signals. Figure 11-2 shows the UL traffic signal flow.
Issue 02 (2007-08-15)
Huawei Technologies Proprietary
11-3
BTS3012 Product Description(for 18TRX)
11 Signal Flow of the BTS3012
Figure 11-2 UL traffic signal flow Um 1 MS
DDPU/DFCU/DFCB
Antenna system
2
2 D T R U 3 DTRB 5 4 ECMB
5 D T R U
5
6
D C S U
D T M U
D C C U 7
DCTB 8 D E L C
9
Abis
BSC
The UL traffic signal flow is as follows:
11-4
1.
The antenna receives the signals from the MS. The signals are amplified by the TMA, and then transmitted to the DDPU (DFCU or DFCB) through the feeder. The TMA is used to compensate the feeder loss and enhance the receive sensitivity of the DDPU (DFCU or DFCB) antenna port. The TMA is optional.
2.
The DDPU (DFCU or DFCB) receives the UL signals and transmits the signals to the DTRUs in the two DTRU subracks after they are filtered by the duplexer and amplified by the lower noise amplifier (LNA).
3.
The DTRU in DTRU subrack 1 receives the signals from the DDPU (DFCU or DFCB) and transmits the signals to the DTRB after amplification and down frequency conversion.
4.
The DTRB sends the signals to the DCSU through the signal cable between the DCSU and the DTRB.
5.
The DCSU sends the signals to the DTMU through the ECMB. In addition, the DTRU in DTRU subrack 0 receives the signals from the DDPU (DFCU or DFCB), and transmits the signals to the DTMU through the ECMB after amplification and down conversion.
Huawei Technologies Proprietary
Issue 02 (2007-08-15)
BTS3012 Product Description(for 18TRX)
11 Signal Flow of the BTS3012
6.
The DTMU backs up the E1 signals and converts the E1 signals through the DBUS on the DCMB. The DTMU then sends the converted signals to the DCCU through the ECMB.
7.
The DCCU sends the signals to the DCTB through the TOP signal cable connecting the DCTB with the DCCU (or DSCU).
8.
The DCTB sends the signals to the DELC.
9.
The DELC provides lightning protection for the signals. Then, it sends the signals to the BSC through the E1 cables.
11.3 Signaling Flow of the BTS3012/BTS3012AE The signaling of the BTS3012/BTS3012AE refers to the signaling on the Abis interface. The DTMU serves as the control part and works with the DTRU and DDPU (DFCU or DFCB) to process the signaling. Figure 11-3 shows the signaling processing flow of the BTS3012/BTS3012AE. Figure 11-3 Signaling processing flow BTS3012/BTS3012AE cabinet
Abis
DTMU
BSC
DTRU DDPU/ DFCU/ DFCB
The signaling processing flow is as follows: 1.
The BSC sends the signaling data to the DTMU of the BTS.
2.
After processing the signaling, the DTMU sends the signaling to the DTRU and DDPU (DFCU or DFCB).
3.
The DTRU and DDPU (DFCU or DFCB) report their board status to the DTMU.
4.
The DTMU obtains the status of the BTS3012 by collecting and analyzing the states of all the boards. Then, it transmits the information to the BSC through the Abis interface.
11.4 Signal Flow of BTS3012 Cabinet Groups The signal flow of BTS3012 cabinet groups refers to the signal flow between the main cabinet group and the extension cabinet groups. The signal flow of cabinet groups involves clock signals and control signals. Figure 11-4 shows the bus connection between BTS3012 cabinet groups. Issue 02 (2007-08-15)
Huawei Technologies Proprietary
11-5
BTS3012 Product Description(for 18TRX)
11 Signal Flow of the BTS3012
Figure 11-4 Bus connection between cabinet groups Control cable Cabinet in the main cabinet group
Cabinet in the extension cabinet group
Clock cable
NOTE
The main cabinet group and extension cabinet group are specified by the DIP switches on the DCSU. For details on setting the DIP switches, refer to DIP Switches on the DCSU (for 18 TRXs).
Clock Signals For details on the clock signal flow, refer to 10 Synchronization of the BTS3012 Clock .
Control Signals The control signals refer to the CBUS1 signals, which are responsible for the communication between the DTMUs in the main and extension cabinet groups. For details on the signal flow, refer to Figure 11-5. Figure 11-5 Signal flow of CBUS1 Cabinet in the extension cabinet group DCTB
Cabinet in the main cabinet group DTMU
DCCU
DCMB
DTMU
DTRB
DTRU
DCCU
DCMB DCSU
NOTE
The DCTB shown in Figure 11-5 is the backplane on top of the BTS3012 cabinet.
The processing of CBUS1 signals is as follows:
11-6
l
The DTMU in the cabinet of the main cabinet group transmits the CBUS1 signals to the cabinets in the extension cabinet groups, through signal conversion of relevant boards.
l
The cabinets in the extension cabinet groups transmit the CBUS1 signals to the DTMUs in those cabinets, through signal conversion of relevant boards. Huawei Technologies Proprietary
Issue 02 (2007-08-15)
11
11 Signal Flow of the BTS3012
Signal Flow of the BTS3012
About This Chapter The BTS3012 signal flow is associated with the traffic and signaling of the BTS. The BTS3012 signal flow consists of the DL traffic signal flow, UL traffic signal flow, signaling processing signal flow, and signal flow for cabinet groups. 11.1 DL Traffic Signal Flow of the BTS3012 This topic describes the DL traffic signal flow of the BTS3012. The DL traffic signal flow refers to the user data that is sent from the BSC to the MS through the BTS3006C. In the BTS3012, the DTMU, DTRU, and DDPU (DFCU or DFCB) work together to process DL traffic signals. 11.2 UL Traffic Signal Flow of the BTS3012 The UL traffic signal flow sends user data from the MS to the BSC through the BTS3012. In the BTS3012, the DDPU (DFCU or DFCB), DTRU, and DTMU work together to process UL traffic signals. 11.3 Signaling Flow of the BTS3012/BTS3012AE The signaling of the BTS3012/BTS3012AE refers to the signaling on the Abis interface. The DTMU serves as the control part and works with the DTRU and DDPU (DFCU or DFCB) to process the signaling. 11.4 Signal Flow of BTS3012 Cabinet Groups The signal flow of BTS3012 cabinet groups refers to the signal flow between the main cabinet group and the extension cabinet groups. The signal flow of cabinet groups involves clock signals and control signals.
Issue 02 (2007-08-15)
Huawei Technologies Proprietary
11-1
BTS3012 Product Description(for 18TRX)
11 Signal Flow of the BTS3012
11.1 DL Traffic Signal Flow of the BTS3012 This topic describes the DL traffic signal flow of the BTS3012. The DL traffic signal flow refers to the user data that is sent from the BSC to the MS through the BTS3006C. In the BTS3012, the DTMU, DTRU, and DDPU (DFCU or DFCB) work together to process DL traffic signals. Figure 11-1 shows the DL traffic signal flow. Figure 11-1 DL traffic signal flow Um 9 MS
DDPU/DFCU/DFCB 8
8
Antenna system
D T R U 7 DTRB 5 6 ECMB 5
5 D T R U
4
D C S U
D T M U
D C C U 3
DCTB 2 D E L C
1
Abis
BSC
The DL traffic signal flow is as follows:
11-2
1.
The BSC sends E1 signals to the DELC through E1 cables.
2.
The DELC provides lightning protection for the received E1 signals, and then sends the E1 signals to the DCTB.
3.
The DCTB sends the E1 signals to the DCCU through the TOP signal cable, which connects the DCTB to the DCCU (or DSCU).
4.
The DCCU sends the E1 signals to the DTMU through the ECMB. Huawei Technologies Proprietary
Issue 02 (2007-08-15)
BTS3012 Product Description(for 18TRX)
11 Signal Flow of the BTS3012
5.
On receiving the signals, the DTMU converts the E1 signals through the data bus (DBUS). The DTMU also assigns the data based on the data configuration on the OML. Then, the signals are sent to the DCSU and the DTRUs in DTRU subrack 0 through the ECMB.
6.
The DCSU sends the signals to the DTRB in DTRU subrack 1 through the signal cable between the DCSU and the DTRB.
7.
The DTRB sends the signals to the DTRUs in DTRU subrack 1.
8.
After receiving the signals, the DTRUs in the two DTRU subracks perform digital filtering, up conversion, and filter amplification, and then send the signals to the DDPU (DFCU or DFCB).
9.
The duplexer in the DDPU (DFCU or DFCB) filters the signals from the DTRU, and then transmits the signals through the antenna subsystem.
11.2 UL Traffic Signal Flow of the BTS3012 The UL traffic signal flow sends user data from the MS to the BSC through the BTS3012. In the BTS3012, the DDPU (DFCU or DFCB), DTRU, and DTMU work together to process UL traffic signals. Figure 11-2 shows the UL traffic signal flow.
Issue 02 (2007-08-15)
Huawei Technologies Proprietary
11-3
BTS3012 Product Description(for 18TRX)
11 Signal Flow of the BTS3012
Figure 11-2 UL traffic signal flow Um 1 MS
DDPU/DFCU/DFCB
Antenna system
2
2 D T R U 3 DTRB 5 4 ECMB
5 D T R U
5
6
D C S U
D T M U
D C C U 7
DCTB 8 D E L C
9
Abis
BSC
The UL traffic signal flow is as follows:
11-4
1.
The antenna receives the signals from the MS. The signals are amplified by the TMA, and then transmitted to the DDPU (DFCU or DFCB) through the feeder. The TMA is used to compensate the feeder loss and enhance the receive sensitivity of the DDPU (DFCU or DFCB) antenna port. The TMA is optional.
2.
The DDPU (DFCU or DFCB) receives the UL signals and transmits the signals to the DTRUs in the two DTRU subracks after they are filtered by the duplexer and amplified by the lower noise amplifier (LNA).
3.
The DTRU in DTRU subrack 1 receives the signals from the DDPU (DFCU or DFCB) and transmits the signals to the DTRB after amplification and down frequency conversion.
4.
The DTRB sends the signals to the DCSU through the signal cable between the DCSU and the DTRB.
5.
The DCSU sends the signals to the DTMU through the ECMB. In addition, the DTRU in DTRU subrack 0 receives the signals from the DDPU (DFCU or DFCB), and transmits the signals to the DTMU through the ECMB after amplification and down conversion.
Huawei Technologies Proprietary
Issue 02 (2007-08-15)
BTS3012 Product Description(for 18TRX)
11 Signal Flow of the BTS3012
6.
The DTMU backs up the E1 signals and converts the E1 signals through the DBUS on the DCMB. The DTMU then sends the converted signals to the DCCU through the ECMB.
7.
The DCCU sends the signals to the DCTB through the TOP signal cable connecting the DCTB with the DCCU (or DSCU).
8.
The DCTB sends the signals to the DELC.
9.
The DELC provides lightning protection for the signals. Then, it sends the signals to the BSC through the E1 cables.
11.3 Signaling Flow of the BTS3012/BTS3012AE The signaling of the BTS3012/BTS3012AE refers to the signaling on the Abis interface. The DTMU serves as the control part and works with the DTRU and DDPU (DFCU or DFCB) to process the signaling. Figure 11-3 shows the signaling processing flow of the BTS3012/BTS3012AE. Figure 11-3 Signaling processing flow BTS3012/BTS3012AE cabinet
Abis
DTMU
BSC
DTRU DDPU/ DFCU/ DFCB
The signaling processing flow is as follows: 1.
The BSC sends the signaling data to the DTMU of the BTS.
2.
After processing the signaling, the DTMU sends the signaling to the DTRU and DDPU (DFCU or DFCB).
3.
The DTRU and DDPU (DFCU or DFCB) report their board status to the DTMU.
4.
The DTMU obtains the status of the BTS3012 by collecting and analyzing the states of all the boards. Then, it transmits the information to the BSC through the Abis interface.
11.4 Signal Flow of BTS3012 Cabinet Groups The signal flow of BTS3012 cabinet groups refers to the signal flow between the main cabinet group and the extension cabinet groups. The signal flow of cabinet groups involves clock signals and control signals. Figure 11-4 shows the bus connection between BTS3012 cabinet groups. Issue 02 (2007-08-15)
Huawei Technologies Proprietary
11-5
BTS3012 Product Description(for 18TRX)
11 Signal Flow of the BTS3012
Figure 11-4 Bus connection between cabinet groups Control cable Cabinet in the main cabinet group
Cabinet in the extension cabinet group
Clock cable
NOTE
The main cabinet group and extension cabinet group are specified by the DIP switches on the DCSU. For details on setting the DIP switches, refer to DIP Switches on the DCSU (for 18 TRXs).
Clock Signals For details on the clock signal flow, refer to 10 Synchronization of the BTS3012 Clock .
Control Signals The control signals refer to the CBUS1 signals, which are responsible for the communication between the DTMUs in the main and extension cabinet groups. For details on the signal flow, refer to Figure 11-5. Figure 11-5 Signal flow of CBUS1 Cabinet in the extension cabinet group DCTB
Cabinet in the main cabinet group DTMU
DCCU
DCMB
DTMU
DTRB
DTRU
DCCU
DCMB DCSU
NOTE
The DCTB shown in Figure 11-5 is the backplane on top of the BTS3012 cabinet.
The processing of CBUS1 signals is as follows:
11-6
l
The DTMU in the cabinet of the main cabinet group transmits the CBUS1 signals to the cabinets in the extension cabinet groups, through signal conversion of relevant boards.
l
The cabinets in the extension cabinet groups transmit the CBUS1 signals to the DTMUs in those cabinets, through signal conversion of relevant boards. Huawei Technologies Proprietary
Issue 02 (2007-08-15)
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