enodeb lte fdd solution training.pdf

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Copyright © 2011 Huawei Technologies Co., Ltd. All rights reserved.

eNodeB LTE FDD Product Description

Copyright © 2011 Huawei Technologies Co., Ltd. All rights reserved. Page1

Contents

1. System Overview

2. System Structure

3. Typical Configuration


eNodeB in LTE/SAE Network

E-UTRAN: Evolved UMTS Terrestrial Radio Access Network

EPC: Evolved Packet Core network

MME: Mobility Management Entity

S-GW: Server Gateway

Page2

Copyright © 2011 Huawei Technologies Co., Ltd. All rights reserved. Page 3

Huawei eNodeB Base Station Description

Distributed eNodeBDBS3900Indoor eNodeB

BTS3900

Outdoor eNodeBBTS3900A

Huawei Fourth Generation Base Station Three standardized modules shared by all eNodeB portfolio

Micro eNodeB

BBU

RFU

Multi-modal BBU2U 19-in rack mount designSimultaneous 2G/3G/4G

operation

Multi-modal RRU 60W/4CCDMA/WCDMA/LTEGSM/UMTS/LTEWiMAX

RRUFuture release


eNodeB Modules

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Baseband UnitBBU3900

RF UnitRFU/RRU

Cabinet

CPRI


Capacity Specification

Item Specification

Maximum number of cells (DBS3900)

4 x 2 MIMO: 6 cells (1.4 MHz/3 MHz/5 MHz/10 MHz/15 MHz/20 MHz)

2 x 2 MIMO: 12 cells (1.4 MHz/3 MHz/5 MHz/10 MHz/15 MHz/20 MHz)

Maximum throughput per cell (20 MHz)

Downlink rate at the Media Access Control (MAC) layer: 150 Mbit/s

Uplink rate at the MAC layer: 70 Mbit/s

Maximum throughput per eNodeB

Downlink: 450 Mbit/s

Uplink: 300 Mbit/s

Maximum number of UEs in RRC_CONNECTED mode in an eNodeB

One LBBP configured (bandwidth of 1.4 MHz): 1008

One LBBP configured (bandwidth of 3 MHz/5 MHz/10 MHz/15 MHz/20 MHz): 1800

More than one LBBP configured (bandwidth of 1.4 MHz): 3024

More than one LBBP configured (bandwidth of 3 MHz/5 MHz/10 MHz/15 MHz/20 MHz): 5400

Maximum number of concurrent Data Radio Bearers (DRBs) per UE

8

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Contents

1. System Overview

2. System Structure

3. Auxiliary Devices



Contents

2. System Structure

2.1 Base Band Unit(BBU) Introduction

2.2 RF Unit(RFU, RRU) Introduction


BBU3900

Dimensions: 86mm x 442mm x 310mm (H x W x D)

Power consumption: 132 W (3 x 10 MHz) ~300 W (3 x 20 MHz)

Weight: ≤12 kg


Physical Modules of the BBU3900

Slots for BBU3900 boards and modules

3 x 20MHz 2T2R typical configuration


LMPT (The LTE Main Processing & Transmission Unit )

Mandatory, Maximum 2 boards, hold in slot 7(default) or 6

Function:

Performs configuration management, equipment management,

performance monitoring, signaling processing, and radio resource

management

Controls all boards in the system

Provides the system clock and transmission ports


LBBP (The LTE Baseband Processing Unit)

Mandatory, Maximum 3 boards, hold in slot 1, 2 or 3 (default)

Function:

Processes uplink and downlink baseband signals

Provides CPRI ports for communication between BBU3900 and RRUs


Specification of LBBP

Board Number of Cell Bandwidth of Cell ANT Configuration

LBBPc 3 15M/20M 2T2R

6 5M/10M 2T2R

3 5M/10M 4T4R

1 15M/20M 4T4R


UPEU (The Universal Power and Environment interface Unit)

Mandatory, Maximum 2 modules, hold in slot 4 (default) and

slot 5

Functions:

Converts -48 V DC or +24 V DC power into +12 V DC power

Provides ports for transmission of two RS485 signals and eight dry

contact signals


Clock Synchronization Modes

GPS Clock

If an eNodeB is synchronized with the GPS clock, the eNodeB obtains clock

synchronization signals from the GPS through the USCU. In this case, both

frequency synchronization and time synchronization are applicable

IEEE1588 V2 Clock

IEEE1588 defines the Precision Time Protocol (PTP), which targets precise

synchronization of distributed and independent clocks in measurement and control

systems, with the precision to microseconds. IEEE1588 V2 supports frequency

synchronization and time synchronization

In LTE applications, high-accuracy frequency synchronization and time

synchronization can be achieved between clock servers and eNodeBs by IEEE1588

V2 synchronization


Clock Synchronization Modes (Cont.)

Clock over IP

Clock over IP is a Huawei proprietary frequency synchronization

technology, which is based on an IP clock server/client architecture. It

supports only frequency synchronization

Free Running

The clock enters the free running mode if no reference clock is available

after the oscillator is warmed up or if the clock has lost its reference input

for a period of time longer than the timer of the holdover mode


Contents

2. System Structure

2.1 Base Band Unit(BBU) Introduction

2.2 RF Unit(RFU, RRU) Introduction


RF Unit Category

There are two kinds of RF units in LTE BTS, RFU and RRU

The RFU is type of radio frequency unit adopted in BTS3900,

BTS3900A, BTS3900L

The RRU is a type of radio remote unit adopted in DBS3900

Page17


FDD RF Unit Types

Types RRU Name TX/RX FRE. BandOutput Power

G/U/LeRAN

version

RRU

RRU3201 2T2R 2.6G 2*40W L eRAN1.0/2.0

RRU3221 2T2R 2.6G 2*40W L eRAN2.1

RRU3908 2T2R1.8G

900M2*30W2*40W

GL/UL/GU eRAN2.0

RRU3220 2T2R 800M 2*40W L eRAN2.0

RRU3222 2T2R 800M 2*40W L eRAN2.1

RFU

LRFU 2T2R 2.6G/AWS 2*40W L eRAN2.0

mRFU 1T2R 1.8G/900M 1*60W GL eRAN2.0

LRFU 2T2R 700M 2*60W L eRAN2.0

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LRFU

LTE Radio Frequency Units (LRFUs) work in Frequency

Division Duplex (FDD) mode

The LRFU processes uplink and downlink services and

controls and monitors internal boards or modules.

LRFU is RF unit which adopted by BTS3900,

BTS3900A, BTS3900L

Page19


MRFU

One Multi-Mode Radio Frequency Unit (MRFU)

supports a maximum of six carriers, which support

GSM/UMTS/LTE

The MRFU processes uplink and downlink services

and controls and monitors internal boards or

modules.

MRFU is RF unit which adopted by BTS3900,

BTS3900A, BTS3900L

Page20


Specifications of RRU3221

Page21

Item Specification

FrequencyBand/

Bandwidth(FDD)

Frequencyband

RX band(MHz)

TX band(MHz)

Supported bandwidth(MHz)

2.6 GHz(Band 7)

2500 to2570

2620 to2690

5, 10, 15, or 20

Dimensions (H x W x D)

485 mm (19.09 in.) x 300 mm (11.22 in.) x 170 mm (6.7 in.) (23.5 L, with a housing)

Weight Not greater than 19 kg (41.9 lb) (with a housing)

Maximumoutput power

2 × 40 W

Powerconsumption

370 W (2X40 100% Load)


RET Modes

STMA Mode Direct Connection Mode


Contents

1. System Overview

2. System Structure



Hardware Quantities in Typical Configurations

Page24

ConfigurationNumbers

of LMPT

Numbers of

LBBP

Number ofRRUs/RFUs

Numbers of

Antennas

3 x 15 MHz/20MHz, 2T2R

1 LBBPc: 13(6, if MRFUs are required)

3 (dual-polarizedantennas)


1 LBBPc: 1 66 (dual-polarizedantennas)


1LBBPc: 1

63 (antennas withfour ports)


1 LBBPc:1 21 (antennas withfour ports)


Network Topologies


Topologies on the CPRI interface

Page26


TMN Topologies – Scenario A

Page27


TMN Topologies – Scenario B

Page28


TMN Topologies – Scenario C

Page29

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enodeb lte fdd solution training.pdf

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