BTS3012 - Huawei Products
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BTS3012

The Huawei BTS3012 is a type of indoor macro base station. It features high integration and excellent performance, thus meeting the requirements for the long-distance coverage of the GSM-R network along railways.When applied in the GSM-R network, the BTS3012 uses the double-transceiver units (DTRU). A BTS3012 cabinet supports a maximum of 12 TRXs.


High Reliability

Huawei BTS3012 is capable of operating with two reliability-enhancing features that are of particular interest for GSM-R networks:


  • The BTS3012 supports the "single frequency double coverage" feature
    The single frequency double coverage scheme enables two BTSs working in active/standby mode to cover the same area. In addition, only one of the BTSs is working at any specific time. The two BTSs use exactly the same frequencies. In normal cases, the active BTS works properly, whereas the standby BTS works but does not transmit power. When the active BTS is faulty, the BSC triggers the switchover between the active BTS and the standby BTS. Specifically, the previously active BTS is downgraded to "standby BTS" status, whereas the previously standby BTS is upgraded to "active BTS" status. This redundant coverage does not require any additional frequencies compared to single coverage, thus improving network availability and ensuring continued network operation even in the case of a BTS failure.
  • The BTS3012 supports the "single frequency TRX redundancy" feature
    The single frequency TRX redundancy feature enables a BTS to be configured with a standby TRX that shares the same frequencies with an active TRX. When the active TRX is faulty, the standby TRX is automatically activated to take over, thus improving network availability and ensuring continued network operation even in the case of a BTS failure.

  • Coverage Capability

    The BTS3012 has the following benefits in terms of coverage:


  • High receive sensitivity
  • The static sensitivity of the TCH/FS channel is –112.5 dBm (a typical value in normal temperature)
  • Power boost technology (PBT)
  • The maximum transmit power of the DTRU can reach 100 W.
  • Transmit diversity and 4-way receive diversity

  • Networking Capability

    The BTS3012 has the following benefits in terms of networking capability:


  • Supports multiple transmission modes such as E1, T1, and STM-1 transmission.
  • Supports multiple topologies such as star, tree, chain, ring, and hybrid topologies.
  • Supports automatic fast switching to the backup route in ring topologies, without any interruption of ongoing services.

  • Antenna

    The BTS3012 has the following benefits in terms of antenna:


  • Supports Remote Electric Tilt (RET) antennas.
  • Supports dual polarization antennas. This reduces the number of antennas in a cell.

  • Installation

    The installation of the BTS3012 has the following features:


  • The BTS3012 supports installation against the wall.
  • The external cables come into the BTS through the top of the cabinet.
  • All the cables are accessible from the front of the cabinet.
  • The field installation personnel only need to position the cabinet, insert the boards, install the external cables, and download the data configuration files.
  • The simple and fast installation of the BTS3012 software and hardware helps to minimize the delay to install and deploy a network.


Working Frequency Bands

Table 4-1 lists the working frequency bands of the BTS3012. The space between carriers is 200 kHz.



BTS3012 working frequency bands

Frequency Bands

TX

RX

E-GSM 900

925 MHz to 960 MHz

880 MHz to 915 MHz

R-GSM 900

921MHz to 960MHz

876MHz to 915MHz

GSM 1800

1805 MHz to 1880 MHz

1710 MHz to 1785 MHz


Transmit Specifications

Table 4-2 lists the nominal output power of the DTRU.


Nominal output power of the DTRU

Modulation Scheme

Normal

High Power

PBT

GMSK

40W (46.00dBm)

60W (47.78dBm)

100W (50.00dBm)

8PSK

40W (46.00dBm)

40W (46.00dBm)

60W (46.78dBm)

a: GMSK = Gaussian Minimum Shift Keying


b: 8PSK = 8-Phase Shift Keying



Receive Specifications

Table 4-3 lists the static receive sensitivity of the BTS3012.


BTS3012 receive sensitivity

Channel Type

Receive Sensitivity

TCH/FS

–112.5 dBm (a typical value in normal temperature)

Others

Better than the requirements specified in the 3GPP TS 05.05 protocols


Dimensions

Table 4-4 lists the mechanical dimensions of the BTS3012.


Mechanical dimensions of the BTS3012

Item

Width (mm)

Depth (mm)

Height (mm)

Cabinet

600

450

1600


Weight

Table 4-5 lists the weight of the BTS3012.


Weight of the BTS3012 cabinet in different configurations

Power Type

Cabinet

Weight (kg)

-48 V

Empty cabinet (but including the boards in the common subrack)

120

O2 (1DTRU+1DDPU)

144

O4 (2DTRU+1DDPU)

156

+24 V

Empty cabinet (but including the boards in the common subrack)

136

O2 (1DTRU+1DDPU)

160

O4 (2DTRU+1DDPU)

172


Power Supply

The –48 V DC and +24 V DC power supply of the BTS3012 complies with the requirement in the ETS 300 132-2. Table 4-6 lists the standard of the input power supply.
The BTS3012 cabinet supports 220 V AC input power through the external power cabinet such as the Sidepower.



Power requirements

Input Power Supply

Value

Rated voltage

–48 V DC

+24V DC

Input voltage range

From –40 V DC to –60 V DC

From +19V DC to +27V DC


Power Consumption

Table 4-7 lists the power consumption of the BTS3012 under typical configuration.


Power consumption under typical configuration

Parameter

Configuration

Power Consumption(W)

Typical power consumption

Normal temperature, 40 W, O2

300

Max power consumption

450

Typical power consumption

Normal temperature, 60 W, O2

350

Max power consumption

500

Typical power consumption

Normal temperature, 40 W, O4

450

Max power consumption

700

Typical power consumption

Normal temperature, 60 W, O4

500

Max power consumption

850


Transmission

Transmission Interfaces

Table 4-8 lists the transmission interfaces of the BTS3012.


BTS3012 transmission interfaces

Interface Type

Quantity

Rate

Standard

E1

4 pairs

2 Mbit/s

ETS 300 420
ITU G.703/G.704

STM-1

2 pairs

155 Mbit/s

ANSI T1.105-1995
ITU I.432.2 G.703
ITU G.957

T1

4 pairs

1.5 Mbit/s

ANSI-G.703/G.704


Other External Interfaces

Table 4-9 lists the other external interfaces of the BTS3012.


Other external interfaces of the BTS3012

Interface

Type

Quantity

Function

Clock interface

External input clocks

1

It is used to connect the external clock, such as the BITS, which provides a high precision clock at 2.048 MHz.

Power and grounding interface

Power supply

1

-

Protection ground

1

Earthing resistance is not more than 10 ohm.

Power ground

1

-

Monitoring interface

External alarm input port

6+32

The DTMU provides 6 Boolean value inputs. If the DEMU is configured, additional 32 Boolean value inputs can be provided.

External control output port

6

The DEMU provides 6 Boolean value outputs.

Environment monitoring communication interface

2

It is used to connect the environment monitoring instrument (EMI).

Antenna feeder interface

RF signal

12

It is the input interface for the feeder


Operational Environment

Table 4-10 shows the requirements for the operational environment of the BTS3012.


BTS3012 operational environment requirements

Operation Type

Item

Range

Long-term operational environment

Temperature

–5°C to +45°C

Relative humidity

5% RH to 95% RH

Short-term operational environment

Temperature

–10°C to +55°C

Relative humidity

5% RH to 95% RH


a: Long-term operational environment refers to the normal working condition of the BTS for a long time.


b: Short-term operational environment refers to the working condition in which the BTS can work normally for not more than 15 days without any hardware failure


BTS3012 is a macro indoor Base Station with a high output power. Located inside an equipment room, it provides wide coverage along the railway line. A typical application scenario of the BTS3012 is as shown in the following figure.


BTS3012 application scenario



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