The RRU3808 is the outdoor remote radio
unit. It is the RF module of the distributed NodeB and is installed close to
the antenna.
The RRU3808 performs modulation, demodulation,
data processing, and combination and division of baseband signals and RF
signals.
1.1 Appearance
1.2 Physical Ports
RRUs
have a modular design. Its external ports are located in the cabling cavity or at
the bottom of the module.
Table 1-1 Physical
ports on the RRU3808
Port
|
Connector
|
Quantity
|
Function
|
Power
supply port
|
OT
terminal
|
1
|
–48 V
DC power supply port
|
Optical
port
|
DLC
connector
|
2
|
Transport
ports
|
Communication
port for the RET antenna
|
DB9
connector
|
1
|
Other
ports
|
Main
TX and RX port
|
DIN
waterproof female connector
|
1
|
RF
ports
|
Diversity
RX port
|
DIN
waterproof female connector
|
1
|
|
Commissioning
port
|
RJ45
connector
|
1
|
Other
ports
|
2.1 Frequency Band
Table 2-1 RRU3808 frequency band
Frequency Band
|
RX Frequency Band (MHz)
|
|
2100
MHz
|
1920
to 1980
|
2110
to 2170
|
AWS
|
1710 to 1755
|
2110 to 2155
|
2.2 Capacity
One RRU3808 supports four
carriers.
2.3 Receiver Sensitivity
Table 2-2 RRU3808 receiver sensitivity
Frequency Band
|
1-Way Receiver Sensitivity (dBm)
|
2-Way Receiver Sensitivity (dBm)
|
4-Way Receiver Sensitivity (dBm)
|
2100 MHz/AWS
|
–125.8
|
–128.6
|
–131.3
|
As
recommended in 3GPP TS25.104, the receiver sensitivity (full band) is measured
at the antenna connector provided that the channel rate reaches 12.2 kbit/s and
the Bit Error Rate (BER) is within 0.001.
2.4 Output Power
One RRU3808 supports four
carriers with 2*40 W output power at the antenna connector of the RF module.
The RRU3808 supports one TX
channel, MIMO, and combination of one TX channel and MIMO.
l One TX channel: maximum output
power of a TX channel reaching 40 W
l MIMO: maximum output power
reaching 40 W + 40 W
l Combination of one TX channel
and MIMO: maximum output power of a TX channel reaching 40 W
Maximum
output power = Maximum output power of the PA - Internal losses. The maximum
output power is measured at the antenna connector of the RF module.
2.5 Power Consumption
l The typical power consumption is
the DBS3900 works with a 40% load at 25°C ambient temperature.
l The maximum power consumption is
the DBS3900 works with a 100% load at 25°C ambient temperature.
Table 2-3 DBS3900
non-MIMO (RRU3808, 2100MHz) power consumption
Configuration
|
Output
Power per Carrier (W)
|
Typical
Power Consumption (W)
|
Maximum
Power Consumption (W)
|
Power
backup duration based on new batteries and typical power consumption (hour)
|
|
50Ah
|
92Ah
|
||||
3
x 1
|
20
|
410
|
490
|
5.2
|
10.7
|
3
x 2
|
20
|
510
|
640
|
4.0
|
8.5
|
3
x 3
|
20
|
740
|
950
|
2.6
|
5.5
|
3
x 4
|
20
|
800
|
1060
|
2.4
|
4.9
|
l
In
the 3x1 or 3x2 configuration, one WBBPb4 and one WMPT are configured.
l
In
the 3x3 or 3x4 configuration, two WBBPb4 units and one WMPT are configured.
|
|||||
Table 2-4 DBS3900
MIMO (RRU3808, 2100MHz) power consumption
Configuration
|
Output
Power per Carrier (W)
|
Typical
Power Consumption (W)
|
Maximum
Power Consumption (W)
|
Power
backup duration based on new batteries and typical power consumption (hour)
|
|
50Ah
|
92Ah
|
||||
3
x 1
|
10 + 10
|
460
|
570
|
4.5
|
9.4
|
3
x 2
|
10 + 10
|
580
|
730
|
3.6
|
7.2
|
3
x 3
|
10 + 10
|
730
|
950
|
2.6
|
5.6
|
3
x 4
|
10 + 10
|
800
|
1060
|
2.4
|
4.9
|
l
In
the 3x1 configuration, one WBBPb4 and one WMPT are configured.
l
In
the 3x2 configuration, two WBBPb4 units and one WMPT are configured.
l
In
the 3x3 configuration, three WBBPb4 units and one WMPT are configured.
l
In
the 3x4 configuration, four WBBPb4 units and one WMPT are configured.
|
|||||
Table 2-5 DBS3900
non-MIMO (RRU3808, AWS) power consumption
Configuration
|
Output
Power per Carrier (W)
|
Typical
Power Consumption (W)
|
Maximum
Power Consumption (W)
|
Power
backup duration based on new batteries and typical power consumption (hour)
|
|
50Ah
|
92Ah
|
||||
3
x 1
|
20
|
410
|
482
|
5.2
|
10.8
|
3
x 2
|
20
|
518
|
632
|
4.0
|
8.4
|
3
x 3
|
20
|
721
|
931
|
2.7
|
5.6
|
3
x 4
|
20
|
835
|
1051
|
2.3
|
4.7
|
l
In
the 3x1 or 3x2 configuration, one WBBPb4 and one WMPT are configured.
l
In
the 3x3 or 3x4 configuration, two WBBPb4 units and one WMPT are configured.
|
|||||
Table 2-6 DBS3900
MIMO (RRU3808, AWS) power consumption
Configuration
|
Output
Power per Carrier (W)
|
Typical
Power Consumption (W)
|
Maximum
Power Consumption (W)
|
Power
backup duration based on new batteries and typical power consumption (hour)
|
|
50Ah
|
92Ah
|
||||
3
x 1
|
10 + 10
|
470
|
572
|
4.4
|
9.2
|
3
x 2
|
10 + 10
|
628
|
766
|
3.2
|
6.7
|
3
x 3
|
10 + 10
|
774
|
975
|
2.5
|
5.1
|
3
x 4
|
10 + 10
|
890
|
1109
|
2.1
|
4.3
|
l
In
the 3x1 configuration, one WBBPb4 and one WMPT are configured.
l
In
the 3x2 configuration, two WBBPb4 units and one WMPT are configured.
l
In
the 3x3 configuration, three WBBPb4 units and one WMPT are configured.
l
In
the 3x4 configuration, four WBBPb4 units and one WMPT are configured.
|
|||||
2.6 Input Power
Table 2-7 Input power
Item
|
Specification
|
Input power
|
–48 V DC; voltage range: –36 V DC to –57 V DC
|
2.7 Equipment Specifications
Table 2-8 Equipment specifications
Item
|
Specification
|
Dimensions (H x W x D)
|
480 mm x 270 mm x 140 mm (without the connectors and housing)
485 mm x 285 mm x 170 mm (with the housing)
|
Weight
|
17 kg (without the housing)
19 kg (with the housing)
|
2.8 Environment Specifications
Table 2-9 Environment specifications
Item
|
Specification
|
|
Operating temperature
|
RRU3808
|
–40℃ to +55℃
(without solar radiation)
–40℃ to +50℃
(with solar radiation)
|
Relative humidity
|
5% RH to 100% RH
|
|
Absolute humidity
|
1–30 g/m3
|
|
Atmospheric
pressure
|
70 kPa to 106 kPa
|
|
Operating environment
|
Compliance standards:
3G TS25.141 V3.0.0
ETSI EN 300019-1-4 V2.1.2 (2003-04) Class 4.1: "Non-weather
protected locations"
|
|
Shockproof
protection
|
NEBS
GR63 zone4
|
|
Ingress
Protection (IP) rating
|
IP65
|
|
Table 3-1 Acronyms and abbreviations
Acronym
and Abbreviation
|
Full
Name
|
BBU
|
Baseband
control Unit
|
BER
|
Bit
Error Ratio
|
RRU
|
Radio Remote Unit
|
WBBP
|
WCDMA Baseband Process unit
|
WMPT
|
WCDMA Main Processing and
Transmission unit
|
