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RRU3829
2.1 RRU Functions
This section describes the main functions of the RRU. The RRU performs the following functions: l Receives downlink baseband data from the BBU and sends uplink baseband data to the BBU. l Receives RF signals from the antenna system, down-converts the signals to intermediate frequency (IF) signals, amplifies the IF signals, and performs analog-to-digital conversion. The transmit (TX) channel filters downlink signals, performs digital-to-analog conversion, and up-converts RF signals to the TX band. l Multiplexes receive (RX) and TX signals on the RF channel, which enables these signals to share the same antenna path. It also filters the RX and TX signals. l The RRU has a bilut-in Bias Tee (BT). The internal BT couples RF signals and OOK signals and transmits them through the TX/RX port A. The internal BT also supplies power to the tower mounted amplifier (TMA). l The RRU can be powered by the AC/DC power module. The RRU is called AC RRU. For details about the AC/DC power module, see the AC/DC Power Module User Guide.
2.2 RRU Exterior
This section describes the exterior and dimensions of an RRU. Figure 2-1 shows an RRU. Figure 2-1 RRU exterior
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Figure 2-2 shows RRU dimensions.
2.3 RRU Ports
This section describes RRU ports positioned on the RRU panels. An RRU has a bottom panel, cabling cavity panel, and indicator panel. Figure 2-3 shows RRU ports on the panels.
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Table 2-1 describes RRU ports and indicators on the panels.
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RRU3829 Technical Specifications
An RRU3829, which is a remote radio unit for UMTS, supports a maximum of four carriers.
Supported Modes and Frequency Bands
Table 1 lists the modes and frequency bands supported by an RRU3829. Table 1 Modes and frequency bands supported by an RRU3829
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Type
Mode
Frequency Band (MHz)
RX Frequency Band (MHz) 1920 to 1980
TX Frequency Band (MHz) 2110 to 2170
RRU3829
UMTS
2100
RF Specifications
Table 2 lists radio frequency (RF) specifications of an RRU3829. Table 2 RRU3829 RF specifications
Type
RX and TX Channel
Capacity
Receiver Sensitivity (dBm) Receiver with One Antenna Receiver with Two Antennas -128.9 Receiver with Four Antennas -131.6
Power
Power Consumption
Sensitivity Sensitivity Sensitivity
RRU3829 2T2R
With MIMO: 4 carriers Without MIMO: 6 carriers
-126.1
Output power of RRU3829 without MIMO Output power of RRU3829 with MIMO Output power of RRU3829 in combined configuration
DBS3900 power consumption (RRU3829 without MIMO) DBS3900 power consumption (RRU3829 with MIMO)
NOTE: The receiver sensitivity is measured, as recommended in 3GPP TS25.104, at the antenna connector over the full band on condition that the channel rate reaches 12.2 kbit/s and the bit error rate (BER) does not exceed 0.001. RRU3829s with MIMO and without MIMO support four carriers and six carriers, respectively. The output power at its antenna port is 2 x 60 W. NOTE:
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Configurations of single-output, multiple-input multiple-output (MIMO), or combination of the two are supported. Uneven power configuration is supported. Table 3 Output power of RRU3829 without MIMO
Number of Carriers Related Number of Carriers Related to Power Amplifier 1 1 2 3 4 1 2 3 0 0 0 0 1 2 3 to Power Amplifier 2
Output Power per Carrier (W) 60 30 20 15 60 30 20
Table 4 Output power of RRU3829 with MIMO
Number of Carriers 1 2 3 4 50+50 30+30 20+20 15+15
Output Power per Carrier (W)
Table 5 Output power of RRU3829 in combined configuration
Number of MIMO Carriers 1 2 3
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Number of Single-Output Carriers 5 4 2
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NOTE: In combined configuration, each TX channel of the RRU3828 supports a maximum of four carriers. The maximum output power is 60 W. Table 6 DBS3900 power consumption (RRU3829 without MIMO)
Configuration (Carrier x Sector)
Output Power per Carrier (W)
Typical Power (W)
Maximum Power (W)
Power Backup Duration Estimated Based on Typical Power Consumption of New Batteries (Hours) 50 Ah 92 Ah 9.5 7.9
Consumption Consumption
31 32 NOTE:
20 20
454 550
529 691
4.7 3.8
Typical power consumption refers to the power consumption when the base station runs with 40% load at the 25C ambient temperature. Maximum power consumption refers to the power consumption when the base station runs with 100% load at the 25C ambient temperature. In 3 x 1 or 3 x 2 configuration, one WBBPd2 board and one WMPT board are configured. Table 7 DBS3900 power consumption (RRU3829 with MIMO)
Configuration (Carrier x Sector)
Output Power per Carrier (W)
Typical Power (W)
Maximum Power (W)
Power Backup Duration Estimated Based on Typical Power Consumption of New Batteries (Hours) 50 Ah 92 Ah 4.1 3.2
Consumption Consumption
32 33 NOTE:
20+20 20+20
932 1152
1214 1557
2.0 1.5
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Typical power consumption refers to the power consumption when the base station runs with 40% load at the 25C ambient temperature. Maximum power consumption refers to the power consumption when the base station runs with 100% load at the 25C ambient temperature. In 3 x 2 configuration, two WBBPd2 boards and one WMPT board are configured. In 3 x 3 configuration, three WBBPd2 boards and one WMPT board are configured.
Engineering Specifications
Table 8 lists the engineering specifications of an RRU3829. Table 8 Equipment specifications of an RRU3829
Type
Input Power
Dimensions (H x W x D)
Weight
RRU3829
-48 V DC; voltage range: -57 V DC to -36 V DC
480 mm x 270 mm x 40 mm (without the housing and connectors) 485 mm x 300 mm x 170 mm (with the housing)
20 kg (without the housing) 22 kg (with the housing)
Table 9 lists the environmental specifications of an RRU3829. Table 9 Environmental specifications of an RRU3829
Type
Operating Temperature
Relative Humidity 5% RH to 100% RH
Absolute Humidity (1 to 30) g/m
3
Atmospheric Pressure 70 kPa to 106 kPa
RRU3829
-40C to +55C (without solar radiation) -40C to +50C (with solar radiation)
Table 10 lists the compliance standards for an RRU3829.
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Table 10 Compliance standards for an RRU3829
Type
Operating Environment
Anti-seismic Performance NEBS GR63 zone4
Protection Rating
RRU3829
Standards: 3GPP TS25.141 V3.0.0 ETSI EN 300019-1-4 V2.1.2 (2003-04) Class 4.1: "Non-weatherprote cted locations"
IP65
Table 11 lists the surge protection specifications of ports on an RRU3829. Table 11 Surge protection specifications of ports on an RRU3829
Port
Usage Scenario
Surge Protection Mode
Specifications
DC power port
Applicable to Surge all scenarios
Differential mode Common mode
2 kV (1.2/50 s)
4 kV (1.2/50 s)
Surge current
Differential mode Common mode
10 kA
20 kA
Antenna port
Applicable to Surge all scenarios current
Differential mode Common mode
8 kA
40 kA
Port for RF module cascading
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Applicable to Surge all scenarios
250 A
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Table 11 Surge protection specifications of ports on an RRU3829
Port
Usage Scenario
Surge Protection Mode
Specifications
RGPS port
Applicable to Surge all scenarios current
Differential mode Common mode
3 kA
5 kA
RET antenna port
Applicable to Surge all scenarios current
Differential mode Common mode
3 kA
5 kA
Dry contact or Applicable to Surge RS485 alarm port all scenarios current
Differential mode Common mode
3 kA
5 kA
Local power monitoring and alarm port
Monitored power and RRUs are installed in back-to-back mode or within 1 m.
Surge
250 A
Antenna Capability
Table 12 lists the antenna capability of an RRU3829. Table 12 Antenna capability of an RRU3829
Type RRU3829 NOTE:
TMA Support Supported
RET Antenna Support AISG2.0
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For RRUs supporting RET antennas, the feeding voltage is 12 V and feeding current is 2.3 A.
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