eran7.0 lte bbu3900 description 02(20140630).pdf

eRAN7.0 LTE BBU3900

Description

Issue 02

Date 2014-06-30

HUAWEI TECHNOLOGIES CO., LTD.

Issue 02 (2014-06-30) Huawei Proprietary and Confidential

Copyright © Huawei Technologies Co., Ltd.

i

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mailto:[email protected]

eRAN7.0 LTE BBU3900

Description Contents



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Contents

1 Introduction .............................................................................................................................. 1

1.1 Functions ...................................................................................................................................................................... 1

1.2 Appearance ................................................................................................................................................................... 1

1.3 Boards ........................................................................................................................................................................... 2

1.3.1 LMPT......................................................................................................................................................................... 2

1.3.2 UMPT ........................................................................................................................................................................ 3

1.3.3 LBBP ......................................................................................................................................................................... 6

1.3.4 UBBP ......................................................................................................................................................................... 7

1.3.5 UTRP ......................................................................................................................................................................... 8

1.3.6 USCU......................................................................................................................................................................... 9

1.3.7 UFLP ....................................................................................................................................................................... 10

1.3.8 UPEU ....................................................................................................................................................................... 11

1.3.9 UEIU ........................................................................................................................................................................ 13

1.3.10 FAN ....................................................................................................................................................................... 14

1.4 Board Configuration ................................................................................................................................................... 15

2 Technical Specifications ........................................................................................................ 16

2.1 Baseband Specifications ............................................................................................................................................. 16

2.1.1 Maximum Number of Cells Supported Per Board ................................................................................................... 16

2.1.2 UE Number Specifications ...................................................................................................................................... 17

2.1.3 Maximum Throughput Per Board ............................................................................................................................ 19

2.1.4 Maximum Throughput Per Cell ............................................................................................................................... 20

2.1.5 Maximum Distance from the BBU .......................................................................................................................... 20

2.2 Capacity Specifications............................................................................................................................................... 21

2.3 Signaling Specifications ............................................................................................................................................. 23

2.4 Transmission Ports ...................................................................................................................................................... 24

2.5 Input Power ................................................................................................................................................................. 24

2.6 Physical Specifications ............................................................................................................................................... 25

2.7 Environment Specifications ........................................................................................................................................ 25

3 Acronyms and Abbreviations ............................................................................................... 26

eRAN7.0 LTE BBU3900

Description 1 Introduction



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1 Introduction

1.1 Functions The BBU3900 is a baseband control unit that performs the following functions:

Manages the entire eNodeB in terms of operation, maintenance, and system clock.

Processes signaling messages.

Provides physical ports for information exchange between the eNodeB and the transport

network.

Provides an OM channel between the eNodeB and operation and maintenance center

(OMC).

Processes uplink and downlink baseband signals.

Provides CPRI ports for communication with RF modules.

Provides ports for communication with environment monitoring devices.

An eNodeB can be configured with a maximum of two BBU3900s for higher processing

capabilities.

1.2 Appearance The BBU3900, which has a case structure, is 19 inches wide and 2 U high. The BBU3900 can

be installed in an indoor or outdoor protective cabinet.

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Figure 1-1 shows the appearance of the BBU3900.

Figure 1-1 Appearance of the BBU3900

1.3 Boards The BBU3900 can be configured with the following boards and units:

Main control and transmission board: LTE main processing and transmission unit

(LMPT), or universal main processing and transmission unit (UMPT)

Baseband processing board: LTE baseband processing unit (LBBP) and universal baseband processing unit (UBBP)

Universal transmission processing unit (UTRP)

Universal satellite card and clock unit (USCU)

Universal FE lightning protection unit (UFLP)

Universal power and environment interface unit (UPEU)

Universal environment interface unit (UEIU)

FAN unit

BBU3900 boards support plug-and-play, and users can configure the boards as required.

1.3.1 LMPT

The LMPT is the main control and transmission board for the LTE network.

Panel

Figure 1-2 shows the LMPT panel.

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Figure 1-2 LMPT panel

Functions

The LMPT performs the following functions:

Controls and manages the entire eNodeB in terms of configuration, equipment,

performance monitoring, and radio resources.


Provides a reference clock, transmission ports, and an OM channel to the LMT or

U2000.

Ports

Table 1-1 describes the ports on the LMPT.

Table 1-1 Ports on the LMPT

Identifier Connector Quantity Description

SFP0 and SFP1 LC 2 FE/GE optical ports

FE/GE0 and FE/GE1 RJ45 2 FE/GE electrical ports

USB USB 1 Software loading port

TST USB 1 Test port

ETH RJ45 1 Local maintenance and

debug port

GPS SMA 1 GPS port

1.3.2 UMPT

The UMPT is a universal main control and transmission unit for the BBU3900. It manages the

entire eNodeB in terms of OM, processes signaling messages, and provides clock signals for

the BBU3900. There are four types of UMPTs: UMPTa2, UMPTa6, UMPTb1, and UMPTb2. Table 1-2 describes the differences between each UMPT type.

Table 1-2 Difference between each UMPT type

Type Working Mode Equipped with a Satellite Card

Data Rate of the CI Interface (Gbit/s)

UMPTa2 LTE No 4.9

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Type Working Mode Equipped with a Satellite Card

Data Rate of the CI Interface (Gbit/s)

UMPTa6 LTE Yes 4.9

UMPTb1 LTE

GUL multi-mode

No 2.5

UMPTb2 LTE

GUL multi-mode

Yes 2.5

Panel

Figure 1-3, Figure 1-4, Figure 1-5, and Figure 1-6 show the panels of UMPTa2, UMPTa6,

UMPTb1, and UMPTb2, respectively.

Figure 1-3 UMPTa2 panel

Figure 1-4 UMPTa6 panel

Figure 1-5 UMPTb1 panel

Figure 1-6 UMPTab2 panel

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Functions

The UMPT performs the following functions:

Controls and manages the entire eNodeB in terms of configuration, equipment,

performance monitoring, radio resources, active/standby switchovers.


Provides a reference clock, transmission ports, and an OM channel to the LMT or U2000.

Transfers low-speed user-plane data and control and maintenance signals of all boards in

the BBU through IDX1 to the target ports.

Ports

Table 1-3 describes the ports on the UMPT.

Table 1-3 Ports on the UMPT


FE/GE0 RJ45 1 FE/GE electrical port

FE/GE1 SFP 1 FE/GE optical port

CI SFP 1 The port is used for BBU interconnection.

USB(1)

USB 1 The Universal Serial Bus (USB) port labeled

"USB" can be used for eNodeB software

upgrade, which is known as the USB-based upgrade mode. Note that this USB port can also

function as a commissioning Ethernet port(2).

The USB port labeled "CLK" is used to receive Time of Day (TOD) clock signals. In addition,

this port can be used for clock tests.

CLK USB 1 Clock port

E1/T1 DB26,

female 1 E1/T1 port supporting four E1s/T1s

GPS SMA 1 The GPS port on the UMPTa2 and UMPTb1 is

reserved for future use.

The GPS port on the UMPTa6 and UMPTb2 is

used for forwarding radio frequency (RF) signals

received from the antenna to the satellite

receiver.

RST - 1 Reset button

NOTE

(1) The security of the USB port is ensured by encryption.

(2) To log in to the eNodeB through the commissioning Ethernet port, ensure that the OM port has been

enabled and the user has been authorized to log in to the eNodeB through the OM port.

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1.3.3 LBBP

There are three types of LBBP: LBBPc, LBBPd1, LBBPd2, and LBBPd3.

Panel

Figure 1-7 shows the LBBPc panel.

Figure 1-7 LBBPc panel

The panel of the LBBPd1 is the same as that of the LBBPd2 and LBBPd3. Figure 1-8 shows

the LBBPd1/LBBPd2/LBBPd3 panel.

Figure 1-8 LBBPd1/LBBPd2/LBBPd3 panel

NOTE

The LBBPd1, LBBPd2, and LBBPd3 have silkscreens LBBPd1, LBBPd2, and LBBPd3 indicating their

board types on the lower left corner of the board panel, respectively.

Functions

The LBBP performs the following functions:



Ports

Table 1-4 describes the ports on the LBBPc.

Table 1-4 Ports on the LBBPc


CPRI0 to CPRI5 SFP, female 6 Data transmission ports that

interconnect with the RF

modules. These ports support

electrical and optical signal

input and output.

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The ports on the LBBPd1 are the same as those on the LBBPd2 and LBBPd3. Table 1-5

describes the ports on the LBBPd1/LBBPd2/LBBPd3.

Table 1-5 Ports on the LBBPd1/LBBPd2/LBBPd3





electrical and optical signal input and output.

HEI QSFP 1 Reserved port

1.3.4 UBBP

There are three types of UBBP: UBBPd3, UBBPd4, UBBPd5, and UBBPd6.

Panel

The panel of the UBBPd3 is the same as that of the UBBPd4, UBBPd5, and UBBPd6. Figure

1-8 shows the UBBPd3/UBBPd4/UBBPd5/UBBPd6 panel.

Figure 1-9 UBBPd3/UBBPd4/UBBPd5/UBBPd6 panel

NOTE

The UBBPd3, UBBPd4, UBBPd5, and UBBPd6 have silkscreens UBBPd3, UBBPd4, UBBPd5, and

UBBPd6 indicating their board types on the lower left corner of the board panel, respectively.

Functions

The UBBP performs the following functions:



Ports

The ports on the UBBPd3 are the same as those on the UBBPd4, UBBPd5, and UBBPd6.

Table 1-5 describes the ports on the UBBPd3/UBBPd4/UBBPd5/UBBPd6.

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Table 1-6 Ports on the UBBPd3/UBBPd4/UBBPd5/UBBPd6





electrical and optical signal

input and output.

HEI QSFP 1 Reserved port

1.3.5 UTRP

The type of UTRP is UTRPc.

Panel

Figure 1-10 shows the UTRPc panel.

Figure 1-10 UTRPc panel

Functions

The UTRPc performs the following functions:

Provides transmission for the LTE networks and enables theses networks to share the same IPSec tunnel.

Provides two Ethernet optical ports with a data rate of 100 Mbit/s or 1000 Mbit/s to

perform the functions of MAC layer, and enables reception and transmission of Ethernet

link data and analysis of MAC addresses; Provides four Ethernet electrical ports with a

data rate of 10 Mbit/s, 100 Mbit/s, or 1000 Mbit/s to perform the functions of MAC layer

and physical layer.

Ports

Table 1-7 describes the ports on the UTRPc.

Table 1-7 Ports on the UTRPc


FE/GE0 and FE/GE1 SFP 2 FE/GE optical ports

FE/GE2 to FE/GE5 RJ45 4 FE/GE electrical ports

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1.3.6 USCU

The USCU is a universal satellite card and clock unit for the BBU3900. There are three types

of USCUs: USCUb11, USCUb14, and USCUb22.

Panel

The panel of the USCUb11 is the same as that of the USCUb14. Figure 1-11 shows the

USCUb11/USCUb14 panel.

Figure 1-11 USCUb11/USCUb14 panel

Figure 1-12 shows the USCUb22 panel.

Figure 1-12 USCUb22 panel

Functions

The USCU performs the following functions:

The USCUb11 provides ports for communicating with the RGPS (for example, the

RGPS on the reused equipment of the customer) and BITS equipment. It does not

support GPS signals.

The USCUb14 does not support RGPS signals. It contains a UBLOX satellite card.

The USCUb22 does not support RGPS signals. It uses a Naviors satellite card, which must be purchased locally and installed onsite.

Ports

The ports on the USCUb11, USCUb14, and USCUb22 are the same. Table 1-8 describes the

ports on the USCUb11/USCUb14/USCUb22.

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Table 1-8 Ports on the USCUb11/USCUb14/USCUb22


GPS SMA coaxial 1 The GPS ports on the USCUb12

and USCUb21 are used for

receiving GPS signals.

The GPS port on the USCUb11 is

reserved and cannot be used for

receiving GPS signals.

RGPS PCB welded wiring

terminal

1 The GPS ports on the USCUb14 and

USCUb22 are used for receiving GPS

signals.

The GPS port on the USCUb11 is

reserved. It cannot receive GPS

signals.

TOD0 RJ45 1 The RGPS port on the USCUb11 is

used for receiving RGPS signals.

The RGPS ports on the USCUb14

and USCUb22 are reserved. They

cannot receive RGPS signals.

TOD1 RJ45 1 Receives or transmits 1PPS+TOD

signals.

BITS SMA coaxial 1 Receives or transmits 1PPS+TOD

signals, and receives TOD signals

from the M1000.

M-1PPS SMA coaxial 1 Receives BITS clock signals, and

supports adaptive input of 2.048

MHz and 10 MHz clock reference

source.

1.3.7 UFLP

There are two types of UFLP: UFLP and UFLPb. The UFLP provides surge protection for

FEs. The UFLPb provides surge protection for FEs/GEs.

Panel

Figure 1-13 shows the UFLP panel.

Figure 1-13 UFLP panel

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Figure 1-14 shows the UFLPb panel.

Figure 1-14 UFLPb panel

Functions

The UFLP provides surge protection for FEs.

The UFLPb provides surge protection for FEs/GEs.

Ports

Table 1-9 describes the ports on the UFLP.

Table 1-9 Ports on the UFLP


INSIDE FE0 and FE1 RJ45 2 Connects to a

transmission board of the

base station

OUTSIDE FE0 and FE1 RJ45 2 Connects to an external

transmission device

Table 1-10 describes the ports on the UFLPb.

Table 1-10 Ports on the UFLPb


INSIDE FE/GE0 and

FE/GE1

RJ45 2 Connects to a

transmission board

of the base station

OUTSIDE FE/GE0 and

FE/GE1

RJ45 2 Connects to an

external

transmission device

1.3.8 UPEU

The UPEU is a power module for the BBU3900. There are four types of UPEU: UPEUa,

UPEUc, and UPEUd.

Panel

Figure 1-15 shows the UPEUa panel.

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Figure 1-15 UPEUa panel

Figure 1-16 shows the UPEUc panel.

Figure 1-16 UPEUc panel

Figure 1-17 shows the UPEUd panel.

Figure 1-17 UPEUd panel

Functions

The UPEU performs the following functions:

Provides two ports with each transmitting one RS485 signal and two ports with each transmitting four Boolean signals. The Boolean signals can only be dry contact or open

collector (OC) signals.

The UPEUa converts -48 V DC input power into +12 V DC and provides an output

power of 300 W.

The UPEUc converts -48 V DC input power into +12 V DC. A UPEUc provides an

output power of 360 W. Two UPEUc boards provide a combined output power of 650 W.

The UPEUd converts -48 V DC input power into +12 V DC and provides an output

power of 650 W.

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Ports

Table 1-11 describes the ports on the UPEUa/ UPEUc/UPEUd.

Table 1-11 Ports on the UPEUa/ UPEUc/UPEUd


UPEUa: –48 V 7W2 1 Port for –48 V DC

power input

UPEUc/UPEUd: –48 V 3V3 1 Port for –48 V DC

power input

EXT-ALM0 RJ45 1 Port for Boolean

inputs 0 to 3

EXT-ALM1 RJ45 1 Port for Boolean

inputs 4 to 7

MON0 RJ45 1 Port for RS485 input 0


1.3.9 UEIU

The UEIU transmits information reported by the environment monitoring device and alarm

information to the main control board.

Panel

Figure 1-18 shows the UEIU panel.

Figure 1-18 UEIU panel

Functions

The UEIU performs the following functions:

Provides two ports, each transmitting one RS485 signal.

Provides two ports, each transmitting four Boolean signals, which can only be dry

contact or OC signals.

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Transmits information reported by the environment monitoring device and alarm information to the main control board.

Ports

Table 1-12 describes the ports on the UEIU.

Table 1-12 Ports on the UEIU


EXT-ALM0 RJ45 1 Port for Boolean inputs 0 to 3

EXT-ALM1 RJ45 1 Port for Boolean inputs 4 to 7



1.3.10 FAN

The FAN is a fan unit for the BBU3900. There are two fan unit types for the BBU3900: FAN

and FANc.

Panel

Figure 1-19 shows the FAN panel.

Figure 1-19 FAN panel

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Figure 1-20 shows the FANc panel.

Figure 1-20 FANc panel

Functions

The FAN controls the rotation speed of the fans and monitors the temperature of the fan

module. The FAN reports the status of the fans and the fan module to the BBU and dissipates

heat from the BBU.

1.4 Board Configuration Figure 1-21 shows the typical board configuration for a BBU3900.

Figure 1-21 Typical board configuration for a BBU3900

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Description 2 Technical Specifications



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2 Technical Specifications

2.1 Baseband Specifications

2.1.1 Maximum Number of Cells Supported Per Board

Table 2-1 Maximum number of cells supported per baseband board

Board Number of Cells

Cell Bandwidth

（MHz）

Antenna Configuration

LBBPc 3 1.4/3/5/10/15/20 3x20M 1T1R

3x20M 1T2R

3x20M 2T2R

LBBPd1 3 1.4/3/5/10/15/20 3x20M 1T1R

3x20M 1T2R

3x20M 2T2R

LBBPd2 3 1.4/3/5/10/15/20 3x20M 1T1R

3x20M 1T2R

3x20M 2T2R

3x20M 2T4R

3x20M 4T4R

LBBPd3 6 1.4/3/5/10/15/20 6x20M 1T1R

6x20M 1T2R

6x20M 2T2R

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Board Number of Cells

Cell Bandwidth

（MHz）

Antenna Configuration

UBBPd3 3 1.4/3/5/10/15/20 3x20M 1T1R

3x20M 1T2R

3x20M 2T2R

UBBPd4 3 1.4/3/5/10/15/20 3x20M 1T1R

3x20M 1T2R

3x20M 2T2R

3x20M 2T4R

3x20M 4T4R

UBBPd5 6 1.4/3/5/10/15/20 6x20M 1T1R

6x20M 1T2R

6x20M 2T2R

UBBPd6 6 1.4/3/5/10/15/20 6x20M 1T1R

6x20M 1T2R

6x20M 2T2R

6x20M 2T4R

6x20M 4T4R

NOTE When a CPRI fiber optic cable is longer than 40 km (24.85 mi), the LBBPd3 board cannot support the

6x20 MHz 2T2R channel.

2.1.2 UE Number Specifications

Table 2-2 UE number specifications

Board Cell Bandwidth(MHz)

Maximum Number of UEs in RRC Connected Mode Per Board

Maximum Number of synchronized users Per Board

Maximum Number of UEs in RRC Connected Mode Per cell

Maximum Number of synchronized users Per cell

1.4 504 168 168 56

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LBBPc

3 1080 360 360 120

5 1800 600 600 200

10/15/20 1800 600 1200 400

LBBPd1/

LBBPd2

1.4 504 300 168 100

3 1080 1080 360 360

5 1800 1800 600 600

10/15/20 3600 3600 1200 1200

LBBPd3

1.4 1008 600 168 100

3 2160 2160 360 360

5 3600 3600 600 600

10/15/20 3600 3600 1200 1200

UBBPd3/

UBBPd4

1.4 504 504 168 168

3 1080 1080 360 360

5 1800 1800 600 600

10/15/20 3600 3600 1200 1200

UBBPd5

1.4 1008 1008 168 168

3 2160 2160 360 360

5 3600 3600 600 600

10/15/20 3600 3600 1200 1200

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UBBPd6

1.4 1008 1008 168 168

3 2160 2160 360 360

5 3600 3600 600 600

10/15 3600 3600 1200 1200

2.1.3 Maximum Throughput Per Board

Table 2-3 Maximum throughput per baseband board

Board Specifications

LBBPc Downlink throughput: 300 Mbit/s

Uplink throughput: 100 Mbit/s

LBBPd1 Downlink throughput: 450 Mbit/s






UBBPd3 Downlink throughput: 450 Mbit/s








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2.1.4 Maximum Throughput Per Cell

Table 2-4 Maximum throughput per cell

Cell Bandwidth

(MHz)

Specifications

1.4 DL cell MAC layer throughput: 8.7Mbps (at 2x2 MIMO, 64QAM)

UL cell MAC layer throughput: 6.4Mbps (at 2x2 MU-MIMO, 16QAM)

UL cell MAC layer throughput: 3.2Mbps (at 1x4 SIMO, 16QAM)

UL cell MAC layer throughput: 6.4Mbps (at 2x4 MU-MIMO, 16QAM)

3 DL cell MAC layer throughput: 22Mbps (at 2x2 MIMO, 64QAM)

UL cell MAC layer throughput: 16Mbps (at 2x2 MU-MIMO, 16QAM)

UL cell MAC layer throughput: 8Mbps (at 1x4 SIMO, 16QAM)


















2.1.5 Maximum Distance from the BBU

Table 2-5 Maximum distance from the BBU

Board Specifications（km）

LBBPc/LBBPd1/UBBPd3 20

LBBPd2/UBBPd4 40

Comment [xianghao1]:

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Board Specifications（km）

LBBPd3/UBBPd5/UBBPd6 Cell quantity≤3: 40

Cell quantity≥4: 20

2.2 Capacity Specifications Maximum number of busy hour call attempts (BHCAs) per eNodeB:

The maximum number of busy hour call attempts (BHCAs) per eNodeB see 2.3

Signaling Specifications.

Maximum throughput per eNodeB:

Table 2-6 lists the maximum throughput per eNodeB (packet size: 550 bytes).

Table 2-6 Maximum throughput per eNodeB (packet size: 550 bytes)


LMPT Uplink data rate at the MAC layer: 300Mbit/s

Downlink data rate at the MAC layer: 450Mbit/s

UMPT Uplink and downlink data rate at the MAC layer: 1500Mbit/s

Maximum number of UEs in RRC_CONNECTED mode per eNodeB FDD:

The maximum number of UEs in RRC_Connected mode supported by an eNodeB can be calculated using the following formula:

Maximum number of UEs in RRC_Connected mode supported by an eNodeB =

Min (Maximum number of UEs in RRC_Connected mode supported by the main

control board, N x Maximum number of UEs in RRC_Connected mode supported

by a baseband board)

The main control board is the LMPT or UMPT.

Table 2-7 lists the maximum number of UEs in RRC_CONNECTED mode supported by

the main control board.

Table 2-7 Maximum throughput per eNodeB (packet size: 550 bytes)


LMPT 5400

UMPT 10800

N is the number of baseband boards, the baseband boards is LBBP or UBBP. The maximum number of UEs in RRC_CONNECTED mode supported by baseband board

see 2.1.2 UE Number Specifications.

Comment [xianghao2]:

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Maximum Number of DRBs Supported:

The maximum number of data radio bearers (DRBs) per user is eight.

The maximum number of DRBs supported by an LMPT/UMPT/LBBP/UBBP is three

times the maximum number of UEs in RRC_Connected mode supported.

The maximum number of DRBs supported by an eNodeB is 32,400.

Error! Reference source not found. lists the capacity specifications of the 3900 series base

station in typical configurations.

Table 2-8 Capacity specifications of the 3900 series base station in typical configurations

Mode Configuration Item Specifications

LTE

（FDD）

UMPTb2+6

UBBPd6

Maximum number of cells per BBU

36 cells (2T2R);

18 cells (2T4R/4T4R@20MHz)

Maximum number of busy hour call attempts

(BHCAs) per eNodeB

FDD

480000

Maximum throughput per

eNodeB FDD

1500Mbit/s

Maximum number of

UEs in RRC_CONNECTED

mode per eNodeB FDD

10800

LMPT+3

LBBPd2

Maximum number of

cells per BBU 18 cells（2T2R@20MHz,

2T4R@20MHz,4T4R@20MHz）

Maximum number of

busy hour call attempts

(BHCAs) per eNodeB

FDD

60000


eNodeB FDD 750Mbit/s

Maximum number of

UEs in

RRC_CONNECTED mode per eNodeB FDD

5400

UMPTb+6

LBBPd2

Maximum number of

cells per BBU 36 cells (2T2R);

18 cells (2T4R/4T4R@20MHz)

Maximum number of

busy hour call attempts

(BHCAs) per eNodeB

FDD

180000


eNodeB FDD

1500Mbit/s

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Mode Configuration Item Specifications

Maximum number of

UEs in

RRC_CONNECTED

mode per eNodeB FDD

10800

2.3 Signaling Specifications Table 2-9 lists the signaling specifications of the LMPT, UMPT, LBBP and UBBP.

Table 2-9 Signaling specifications of the LMPT, UMPT, LBBP and UBBP

Specification Signaling Specification(BHCA)

UMPTa2/ UMPTa6 140000

UMPTb1/UMPTb2 180000

LMPT 60000

LBBPc 60000

LBBPd1, LBBPd2, LBBPd3, LBBPd4 80000

UBBPd3, UBBPd4 90000

UBBPd5, UBBPd6 180000

The signaling specification of an eNodeB is calculated by the following formula:

In LBBP+LMPT/UMPT scenarios, eNodeB signaling specifications = Min (N x LBBP

signaling specifications, M x signaling specifications of the main control board), where N

is the number of LBBP boards and M is the number of main control boards (LMPT or

UMPT).

In UBBPd+LMPT scenarios, eNodeB signaling specifications = Min (N x UBBPd signaling

specifications, M x LMPT signaling specifications), where N is the number of UBBPd

boards and M is the number of LMPT boards.

In UBBPd+UMPT scenarios, eNodeB signaling specifications = N x UBBPd signaling

specifications, where N is the number of UBBPd boards.

NOTE

The signaling specifications of an eNodeB cannot exceed 480000 BHCA.

Table 2-10 lists the typical board combinations and the corresponding signaling specifications

of eNodeBs.

Table 2-10 Typical board combinations and the corresponding signaling specifications


1 LMPT+1 LBBPc 60000

eRAN7.0 LTE BBU3900




24




1 UMPT+1 LBBPd 80000

1 UMPT+2 LBBPd 140000 (UMPTa)

160000 (UMPTb)

1 UMPT+3 LBBPd 140000 (UMPTa)

180000 (UMPTb)

1 UMPTb+1 UBBPd 90000 (UBBPd3/UBBPd4)

180000 (UBBPd5/UBBPd6)

2.4 Transmission Ports

Table 2-11 Transmission ports

Boards Ports

LMPT Two FE/GE electrical ports, two FE/GE optical ports, or one FE/GE optical port + one FE/GE electrical port

UMPT One FE/GE electrical port +one FE/GE optical port+one E1/T1 port. (Each

E1/TI port provides 4 E1s/T1s.)

UTRPc Four FE/GE electrical ports + two FE/GE optical ports

2.5 Input Power

Table 2-12 Input power

Item Specification

Input power –48 V DC; voltage range: –38.4 V DC to –57 V DC

eRAN7.0 LTE BBU3900




25

2.6 Physical Specifications

Table 2-13 Physical specifications

Item Specification

Dimensions (height x width x length)

86 mm x 442 mm x 310 mm

Weight ≤ 12 kg (in full configuration)

2.7 Environment Specifications

Table 2-14 Environment specifications

Item Specification

Operating temperature –20ºC to +50ºC (long-term)

+50ºC to +55ºC (short-term)

Relative humidity 5% RH to 95% RH

Protection class IP20

Atmospheric pressure 70 kPa to 106 kPa

eRAN7.0 LTE BBU3900

Description 3 Acronyms and Abbreviations



26

3 Acronyms and Abbreviations

B

BBU baseband unit

BITS building integrated timing supply

BHCA busy hour call attempts

C

CPRI common public radio interface

D

DC direct current

DL downlink

DRB Data Radio Bearers

F

FE Fast Ethernet

G

GE Gigabit Ethernet

GLONASS Global Navigation Satellite System

GPS Global Positioning System

GSM Global Service Mobile

H

HDLC High-level Data Link Control

eRAN7.0 LTE BBU3900




27

HEI High Speed Extension Interface

I

IPSec IP Security

L

LBBP LTE baseband processing unit

LMT local maintenance terminal

LTE Long Term Evolution

M

MAC Media Access Control

MIMO multi-input and multi-output

O

OC Optical Carrier

OM operation and maintenance

OMC operation and maintenance center

P

PCB printed circuit board

Q

QSFP Quad Small Form-factor Pluggable

R

RGPS Remote Global Positioning System

RH relative humidity

S

SFP small form-factor pluggable

T

TOD time of day

eRAN7.0 LTE BBU3900




28

U

UEIU universal environment interface unit

UELP universal E1/T1 lightning protection unit

UFLP universal FE lightning protection unit

UL uplink

UMPT universal main processing and transmission unit

UPEU universal power and environment interface unit

USB Universal Serial Bus

USCU universal satellite card and clock unit

UTRP universal transmission processing unit

eran7.0 lte bbu3900 description 02(20140630).pdf

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