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DBS3900 TDD

With a focus on customer-oriented innovation, Huawei launches a series of products in its SingleBTS product portfolio, including the distributed E-UTRAN NodeB (eNodeB) DBS3900 LTE time division duplex (TDD). E-UTRAN is short for evolved universal terrestrial radio access network. The DBS3900 LTE TDD (referred to as DBS3900 in this document) fully utilizes Huawei platform resources and a variety of technologies to meet the challenges of mobile network development.
The eNodeB is used for radio access in the LTE system. The eNodeB mainly performs radio resource management (RRM) functions such as air interface management, access control, mobility control, and user equipment (UE) resource allocation. Multiple eNodeBs constitute an E-UTRAN system. The DBS3900 has only two types of basic modules: baseband unit (BBU3900) and remote radio unit (RRU), which can be flexibly configured to meet requirements in different usage scenarios. In addition, the DBS3900 features a small size, low power consumption, flexible installation, and easy site deployment.


Energy Saving and Environment Friendly

  • Due to their small size and modular design, power amplifiers (PAs) do not take up much space in the equipment room, and resources are saved with the new energy-saving technique. The following measures also help save energy:
  • Radio frequency (RF) channels are blocked and power amplifier (PA) voltage is adjusted if the downlink load reaches a preset threshold.
  • The power supply unit (PSU) shuts down if the DBS3900 is provided with sufficient power. The temperature control function controls board temperature. Outdoor cabinets work in direct ventilation mode, and RRUs work in natural heat dissipation mode..


Flexible Installation

  • Flexible installation of the DBS3900 simplifies site acquisition and achieves fast network deployment with a low total cost of ownership (TCO). To reduce the installation investment, the BBU3900 can be installed on an indoor wall or in a standard cabinet. The RRU can be mounted on a pole, tower, or concrete wall, or close to the antenna system to reduce the cost of feeders and power consumption.


High Transmission Reliability and Board Performance

  • The following features are introduced to ensure high transmission reliability and high board performance:
  • Support for the Huawei SingleBTS platform
  • Support for co-radio resource management (Co-RRM), co-transmission resource management (Co-TRM), co-operation and management (Co-OAM), and co-radio network plan&radio network optimization (Co-RNP&RNO)Support for route backup
  • Transmission paths can be switched over to protect high-priority service data.
  • Support for the backup of important boards and power modules
  • Support for the backup of important boards and power modules

Capacity Specifications

Item Specifications
Maximum number of cells 9 cells (10 MHz or 20 MHz)
Maximum throughput per cell (20 MHz) 2T2R DL:UL=2:2
Downlink rate at the Media Access Control (MAC) layer: 78 Mbit/s(64QAM)
Uplink rate at the Media Access Control(MAC): 18Mbps(16QAM)
Maximum throughput per eNodeB Downlink: 450 Mbit/s
Uplink:300 Mbit/s
Maximum number of UEs in RRC_CONNECTED mode in an eNodeB: 5400
Maximum number of data radio bearer (DRB) 8



BBU3900

Transmission Ports

Board Specifications
UMPT One FE/GE electrical port, one FE/GE optical port, and one DB26 port transmitting four links of E1/T1 signals



Input Power

Item Specifications
Input power –48 V DC (voltage range: –38.4V DC to –57V DC)



Physical Specifications

Item Specifications
Dimensions (height x width x depth) 86 mm x 442 mm x 310 mm (3.46 in. x 17.40 in. x 12.20 in.)
Weight ≤ 12 kg (26.46 lb) (in full configuration)



Environmental Specifications

Item Specifications
Working temperature –20°C to +50°C (–4°F to +122°F) (long term)
+50°C to +55°C (122°F to 131°F) (short term)
Relative humidity 5% RH to 95% RH
Ingress Protection (IP) rating IP20
Atmospheric pressure 70 kPa to 106 kPa



RRU3232

Capacity

Frequency Band Frequency Range Carrier Bandwidth
Band 38 (2.6 GHz) 2570 MHz to 2620 MHz 5 MHz or 10 MHz or 20 MHz
Band 40 (2.3 GHz) 2300 MHz to 2400 MHz 5 MHz or 10 MHz or 20 MHz
Band 41 (2.6 GHz) 2496 MHz to 2690 MHz 5 MHz or 10 MHz or 20 MHz
3.5 GHz 3400 MHz to 3700 MHz 5 MHz or 10 MHz or 20 MHz
1.8 GHz 1755 MHz to 1920 MHz 5 MHz or 10 MHz or 20 MHz

An RRU3232 supports one carrier with the 5 MHz or 10 MHz or 20 MHz bandwidth.




Output Power

Frequency Band Transmit Power of an RF Channel Total Transmit Power
Band 38（2.6GHz） 20W 80W
Band 41（2.6GHz） 20W 80W
Band 40（2.3GHz） 20W 80W
3.5GHz 10W 40W
1.8GHz 20W 80W



Input Power

Item Specifications
Input power –48 V DC (voltage range: –36 V DC to –57 V DC}



Physical Specifications

Item Specifications
Dimensions (height x width x depth) 480 mm x 270 mm x 140 mm (18.90 in. x 10.63 in. x 5.51 in.) (18 L without the housing)
485 mm x 300 mm x 170 mm (19.09 in. x 11.81 in. x 6.69 in.) (24.7 L with the housing)
Weight ≤ 19.5 kg (43.00 lb) (without the housing)
≤ 21 kg (46.31 lb) (with the housing)



Environmental Specifications

Item Specifications
Working temperature –40°C to +50°C (–40°F to +122°F) (with solar radiation of 1120 W/m2)
–40°C to +55°C (–40°F to +131°F) (without solar radiation)
Relative humidity 5% RH to 100% RH
Absolute humidity 0.26 g/m3 to 25 g/m3
Atmospheric pressure 70 kPa to 106 kPa
Operating environment The RRU3232 complies with the following standards:
3GPP TS25.141 V3.0.0
ETSI EN 300019-1-4 V2.1.2 (2003-04) Class 4.1: "Non-weatherprotected locations"
Anti-seismic protection NEBS GR63 zone4
Ingress Protection (IP) rating IP65



Reliability

Item Specifications
System availability ≥ 99.999%
Mean time between failures (MTBF) ≥ 155,000 hours
Mean time to repair (MTTR) ≤ 1 hour
System restarting time < 450 seconds



eRRU3232

Capacity

Frequency Band Frequency Range Carrier Bandwidth
3.7GHz 3600MHz～3800MHz 5Mhz/10MHz/20MHz
5.0GHz 4900MHz～5900MHz 5Mhz/10MHz/20MHz

An RRU3232 supports one carrier with the 5 MHz or 10 MHz or 20 MHz bandwidth.




Output Power

Frequency Band Transmit Power of an RF Channel Total Transmit Power
3.7GHz 10W 40W
5.0GHz 0.5W 2W



Input Power

Item Specifications
Input power –48 V DC (voltage range: –36 V DC to –57 V DC}



Physical Specifications

Item Specifications
Dimensions (height x width x depth) 480 mm x 270 mm x 140 mm (18.90 in. x 10.63 in. x 5.51 in.) (18 L without the housing)
485 mm x 300 mm x 170 mm (19.09 in. x 11.81 in. x 6.69 in.) (24.7 L with the housing)
Weight ≤ 19.5 kg (43.00 lb) (without the housing)
≤ 21 kg (46.31 lb) (with the housing)



Environmental Specifications

Item Specifications
Working temperature –40°C to +50°C (–40°F to +122°F) (with solar radiation of 1120 W/m2)
–40°C to +55°C (–40°F to +131°F) (without solar radiation)
Relative humidity 5% RH to 100% RH
Absolute humidity 0.26 g/m3 to 25 g/m3
Atmospheric pressure 70 kPa to 106 kPa
Operating environment The RRU3232 complies with the following standards:
3GPP TS25.141 V3.0.0
ETSI EN 300019-1-4 V2.1.2 (2003-04) Class 4.1: "Non-weatherprotected locations"
Anti-seismic protection NEBS GR63 zone4
Ingress Protection (IP) rating IP65



Reliability

Item Specifications
System availability ≥ 99.999%
Mean time between failures (MTBF) ≥ 155,000 hours
Mean time to repair (MTTR) ≤ 1 hour
System restarting time < 450 seconds



RRU3251

Capacity

Frequency Band Frequency Range Carrier Bandwidth
Band 40（2.3GHz） 2300MHz～2400MHz 10MHz/20MHz

An RRU3251 supports one carrier with the 10 MHz or 20 MHz bandwidth.




Output Power

Frequency Band Transmit Power of an RF Channel Total Transmit Power
Band 40（2.3GHz） 50W 100W



Input Power

Item Specifications
Input power –48 V DC (voltage range: -34V DC～-60V DC )



Physical Specifications

Item Specifications
Dimensions (height x width x depth) 400mm × 220mm × 140mm (12.5L without the housing) 400mm × 240mm × 160mm (16L L with the housing)
Weight ≤ 13.5kg (43.00 lb) (without the housing) ≤ 14.5kg (46.31 lb) (with the housing)



Environmental Specifications

Item Specifications
Working temperature –40°C to +40°C (with solar radiation of 1120 W/m2) –40°C to +45°C (without solar radiation)
Relative humidity 5% RH to 100% RH
Absolute humidity 0.26 g/m3 to 25 g/m3
Atmospheric pressure 70 kPa to 106 kPa
Operating environment The RRU3232 complies with the following standards: 3GPP TS25.141 V3.0.0 ETSI EN 300019-1-4 V2.1.2 (2003-04) Class 4.1: "Non-weatherprotected locations"
Anti-seismic protection NEBS GR63 zone4
Ingress Protection (IP) rating IP65

The DBS3900 addresses site acquisition problems and shortens network deployment time. It enables enterprises to efficiently deploy a wireless network with a low TCO by minimizing the investment in electricity, space, and manpower.


The DBS3900 consists of the BBU3900 and RRU. The BBU3900 is characterized by its small footprint, easy installation, and low power consumption. Therefore, the BBU3900 can be easily installed in a spare space at an existing site. The RRU is compact and lightweight. It can be installed close to an antenna to shorten feeder length and improve system coverage.


Figure 2-10 and Figure 2-11 shows the typical scenarios for installing the DBS3900 outdoors and indoors, respectively.



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