• No results found

Flexi Multiradio Introduction - Sharing Session

N/A
N/A
Protected

Academic year: 2021

Share "Flexi Multiradio Introduction - Sharing Session"

Copied!
96
0
0

Loading.... (view fulltext now)

Full text

(1)

Flexi Multiradio BTS GSM/EDGE

Introduction

Sharing session

(2)

Content

Introduction of Flexi Multiradio BTS GSM/EDGE

Flexi Multiradio BTS GSM/EDGE Architecture

Flexi Multiradio BTS GSM/EDGE Modules

Flexi Multiradio BTS GSM/EDGE SW Compatibility

Flexi Multiradio BTS GSM/EDGE RF Configuration

Flexi Multiradio BTS GSM/EDGE Performance

Comparison

(3)

Content

Introduction of Flexi Multiradio BTS GSM/EDGE

Flexi Multiradio BTS GSM/EDGE Architecture

Flexi Multiradio BTS GSM/EDGE Modules

Flexi Multiradio BTS GSM/EDGE SW Compatibility

Flexi Multiradio BTS GSM/EDGE RF Configuration

Flexi Multiradio BTS GSM/EDGE Performance

Comparison

(4)

Introduction to Flexi Multiradio BTS

GSM/EDGE

(5)

Introduction to Flexi Multiradio BTS GSM/EDGE

Background (1/2)

Migration to

LTE

Evolve to the ultimate next data

& multimedia machine

Provide WCDMA and

services in GSM bands

WCDMA

refarming

Build OPEX optimized GSM sites

prepared for future evolution

GSM New Sites,

Expansions and

Modernization

(6)

Introduction to Flexi Multiradio BTS GSM/EDGE

Background (2/2)

GSM

UMTS

LTE

Cheapest and widest

range of terminals

Ultimate technology

for spectral efficiency

improvement

Global roaming

Broadest indoor, rural

and global radio

coverage

Best spectral

efficiency available

today

Widening terminal

portfolio

Flat architecture

High integration

level, low power

consumption

Economies of scale

through widest user

base

For Voice and Data

Lowering cost per bit

Is it possible to have

all these benefits in

(7)
(8)

Introduction to Flexi Multiradio BTS GSM/EDGE

Flexi Multiradio BTS GSM/EDGE Product Overview

Flexi Multiradio BTS is a base transceiver station that is part

of the Nokia Siemens Networks

Flexi BTS platform

for

GSM/EDGE, WCDMA, and

LTE

networks.

It is a multiradio or multicarrier BTS that can use all these

network technologies either in dedicated or concurrent

mode of operation

Its modular design

makes site acquisition and installation

easy, and reduces the time needed for rolling out network

coverage in a new area.

It allows using existing site space efficiently, the existing

Flexi BTS modules can be installed together with Flexi

Multiradio BTS modules.

The existing Flexi BTS cabinets and casings, power supplies,

and the 3G Flexi System Module can be used with Flexi

(9)

Introduction to Flexi Multiradio BTS GSM/EDGE

The evolution of Flexi BTS concept continues

2005/2006

Flexi WCDMA

Increased:

 Power Efficiency

 Radio performance

 Integration density

 Investment protection

 Flexibility

 Total Value of ownership

Flexi GSM/EDGE

2008

Flexi Multiradio

site solutions

2010

Flexi Multiradio BTS

GSM / WCDMA / LTE

New SM: GSM/EDGE high capacity

New RF: 900,1800 MHz

3sector RF module, 3x60W

RRH: (30W+30W), 60W

Flexi Multimode BTS (RU10)

New SM: WCDMA/LTE

New RF: 2100MHz

3 sector RF module, 3x 60W

RRH 1x60W

WCDMA/LTE

2 sector RF

1 sector RF

WCDMA SM

2 TRX RF

GSM SM

(10)

Introduction to Flexi Multiradio BTS GSM/EDGE

Real concurrent mode and SW defined radio

GSM

EDGE

WCDMA

HSPA

:

LTE

Concurrent mode:

Same Flexi BTS module operates simultaneously in

two or more radio modes

Dedicated BTS HW

Radio features

O & M

BTS HW

Radio features

O & M

Radio mode

Radio access functionality is shifted from dedicated

hardware to software

(11)

Introduction to Flexi Multiradio BTS GSM/EDGE

Flexi Multiradio BTS Platform

RF Module

System

Module

Remote RF

Head

Flexi Multiradio BTS

Site acquisition and construction principles

C

om

m

on

for

al

l r

adi

o

tec

hnol

ogi

es

Antenna system / transport / power systems

Modular BTS platform

OR

Optional

AC/BBU

Module

F

le

xi

BT

S

bui

ldi

ng

bl

oc

k

s

(12)

Introduction to Flexi Multiradio BTS GSM/EDGE

Flexi Multiradio BTS – Product Concept

System

Module

RF

Module

SW

Multimode SM

Multiradio EDGE SM

3-sector RF

GSM/EDGE SW

WCDMA SW

WCDMA BTS

Multimode SM

3-sector RF

Multimode SM

3-sector RF

LTE BTS

Multiradio EDGE SM

3-sector RF

GSM BTS

Multiradio EDGE SM

Multimode SM

3-sector RF

GSM/WCDMA/LTE BTS

(13)

Introduction to Flexi Multiradio BTS GSM/EDGE

Flexi Multiradio BTS in Concurrent Mode Operation

RF Module sharing

GSM-LTE

RF Module sharing

WCDMA-LTE

Multimode

System Module

WCDMA SW

3-sector

RF

Module

Flexi Multiradio BTS

EDGE 18/36

Carrier System

Module

Multimode

System Module

WCDMA SW

3-sector

RF

Module

Flexi Multiradio BTS

Multimode

System Module

LTE SW

Multimode

System Module

WCDMA/LTE SW

3-sector

RF

Module

Flexi Multiradio BTS

RF and System Module

sharing WCDMA-LTE

Multimode

System Module

LTE SW

3-sector

RF

Module

EDGE 18/36

Carrier System

Module

RF Module sharing

GSM-WCDMA

Flexi Multiradio BTS

(14)

Introduction to Flexi Multiradio BTS GSM/EDGE

Concurrent Mode Operation with multiple frequency bands

-Examples

RF Module sharing

GSM-LTE

RF Module sharing

WCDMA-LTE

Multimode

System Module

LTE SW

3-sector

RF

Module

Band 2

Flexi Multiradio BTS

EDGE 18/36

Carrier System

Module

Multimode

System Module

WCDMA SW

3-sector

RF

Module

Band 2

Flexi Multiradio BTS

Multimode

System Module

LTE SW

Multimode

System Module

WCDMA/LTE SW

3-sector

RF

Module

Band 1

Flexi Multiradio BTS

RF and System Module

sharing WCDMA-LTE

3-sector

RF

Module

Band 1

3-sector

RF

Module

Band 1

3-sector

RF

Module

Band 2

Multimode

System Module

WCDMA SW

3-sector

RF

Module

Band 2

Flexi Multiradio BTS

EDGE 18/36

Carrier System

Module

3-sector

RF

Module

Band 1

RF Module sharing

WCDMA-GSM

(15)

High Capacity Flexi EDGE

System Module 18/36TRX

High Capacity Multimode

System Module (WCDMA/LTE)

3-Sector Multiradio RF Module

(GSM/WCDMA/LTE)

1 Gbps throughput

Multiband support

Multimode support

Dedicated and concurrent

mode SW defined

High Capacity (18/36 TRX)

Multiband support

Optimized for GSM/EDGE

Highest integration density level

GSM/EDGE/WCDMA/HSPA/LTE

defined by SW

Dedicated and concurrent mode

60W output per sector with

Multi Carrier Power Amplifier

(MCPA)

3 sector RFM

(GSM/WCDMA/LTE)

GSM/EDGE

System Module

WCDMA/LTE

System Module

Introduction to Flexi Multiradio BTS GSM/EDGE

(16)

Flexi Multiradio BTS is the baseline for Multiradio solution

Revolutionary BTS with weather-proof modules

Installation in stacks, on walls, poles, in 19” racks or new flexi cabinets or legacy

BTS cabinet

Same modules for indoors and outdoors, macro- and microcellular sites

Temperature range -33°C …+50 °C (performance guaranteed up to +50 °C), temporarily

+55 °C

Capacity Solution

1 to 18/36* TRX in sectors under 1 BCF

Coverage Solution

max output power 40/60** Watts RF, sensitivity -115.5 dBm (with 2-way UL diversity)

Shared Solution

RF module can be shared with WCDMA/LTE

Introduction to Flexi Multiradio BTS GSM/EDGE

(17)

Introduction to Flexi Multiradio BTS GSM/EDGE

Conformity to standards

Conformity to 3GPP Standards:

GSM/EDGE

:

GERAN TS 45.005 (Rel.8), TS 51.021: MC BTS class 1 and 2 *

For MC BTS Class 1 the following relaxations apply:

Number of the carriers/branch: Up to 3 carriers

Total output power/branch: Up to 60W (1dB tolerance allowed)

No single carrier 3GPP specifications are guaranteed.

WCDMA

: UTRA-FDDTS 25.104 (Rel.8), TS 25.141

LTE

: eUTRA TS 36.104 (Rel.8), TS 36.141

Multi Standard Radio:

3GPP TS 37.104 Rel.9

*) MC BTS class 2 is characterized by a limit for TX 3rd order intermodulation of -60 dBc (average). Specification of TX

spurious emissions outside the TX band will also be less stringent in an offset range from 2MHz to 10MHz from band

edges.

(18)

Introduction to Flexi Multiradio BTS GSM/EDGE

RF Performance

# of carriers

RFM

1

+47.8 dBm (60W)

2

+44.8 dBm (30W)

3

+43.0 dBm (20W)

4

+41.8 dBm (15W)

# of carriers

RRH

1

+46.0 dBm (40W)

2

+43.0 dBm (20W)

3

+41.2 dBm (13.3W)

4

+40.0 dBm (10W)

Note! The allocated sum power/radio can be higher

than 60W/branch in RFM or 40W/branch in RRH.

In this case allocation is only statistical output power.

3-sector RFM GSM/EDGE output power

RRH GSM/EDGE output power

3-sector RFM WCDMA/LTE output power

RRH WCDMA/LTE output power

Nominal GSM/EDGE output power/TRX at antenna connector

# of TRX

GMSK

8PSK

16/32QAM

1

+47.8 dBm (60W)

+47.8 dBm (60W)

+47.8 dBm (60W)

2

+44.8 dBm (30W)

+44.8 dBm (30W)

+44.8 dBm (30W)

3

+43.0 dBm (20W)

+43.0 dBm (20W)

+43.0 dBm (20W)

4

+41.8 dBm (15W)

+41.8 dBm (15W)

+40.6 dBm (11.6W)

5

+40.8 dBm (12W)

+40.5 dBm (11.2W)

+38.7 dBm (7.4W)

6

+40.0 dBm (10W)

+38.9 dBm (7.8W)

+37.2 dBm (5.2W)

Nominal GSM/EDGE output power/TRX at antenna connector

# of TRX

GMSK

8PSK

16/32QAM

1

+46.0 dBm (40W)

+46.0 dBm (40W)

+46.0 dBm (40W)

2

+43.0 dBm (20W)

+43.0 dBm (20W)

+43.0 dBm (20W)

3

+41.2 dBm (13.3W)

+41.2 dBm (13.3W)

+41.2 dBm (13.3W)

4

+40.0 dBm (10W)

+40.0 dBm (10W)

+38.8 dBm (7.6W)

5

+39.0 dBm (8W)

+38.7 dBm (7.4W)

+36.9 dBm (4.9W)

6

+38.2 dBm (6.7W)

+37.1 dBm (5.1W)

+35.4 dBm (3.5W)

BTS Receiver

Sensitivity

Sensitivity

800/900/1800/1900

dBm

4-way diversity

-118.0

2-way diversity

-115.5

Single branch

-112.7

(19)

Introduction to Flexi Multiradio BTS GSM/EDGE

BTS powering and power consumption (1/2)

Floating input voltage 48 VDC nominal

40.5…57

VDC for System Module

36…57

VDC for Radio Module

Power consumption requirements for Flexi Multiradio are defined

for certain BTS configurations with certain load:

650W

for

GSM

4+4+4 with 40% TS load and 15W output power/TRX

400W

for

WCDMA

1+1+1 with 50% traffic load at 20W output power

790W

for

concurrent GSM

2+2+2/

WCDMA

1+1+1 with 20W output

power/carrier/TRX

400W

typical power consumption for RRH with 100% load and 2*40W output

power

(20)

Introduction to Flexi Multiradio BTS GSM/EDGE

BTS powering and power consumption (2/2)

3 Sector RFM

925W, 100% Load

Configuration

O/P Power per

TRX

Power Consumption

100% Load

50% Load

40% Load

2/2/2

20

760W

510W

460W

3/3/3

20

1010W

635W

560W

4/4/4

15

1010W

635W

560W

6/6/6

10

1010W

635W

560W

8/8/8

30

1940W

1190W

1040W

Power Consumption examples for various GSM configurations

ESMB with TRS unit : 85W

ESMC with TRS unit : 125W

2Tx, 40W+40W RRH

(21)

Content

Introduction of Flexi Multiradio BTS GSM/EDGE

Flexi Multiradio BTS GSM/EDGE Architecture

Flexi Multiradio BTS GSM/EDGE Modules

Flexi Multiradio BTS GSM/EDGE SW Compatibility

Flexi Multiradio BTS GSM/EDGE RF Configuration

Flexi Multiradio BTS GSM/EDGE Performance

Comparison

(22)
(23)

Flexi Multiradio BTS GSM/EDGE Architecture

Flexi Multiradio Architecture basic principles

Both GSM/EDGE

and WCDMA/LTE have own separate system

modules when the BTS is used in concurrent mode having several

operational modes simultaneously.

The radio modules (RFM

and RRH) as well as the antenna lines

could be shared between the system modules.

The

interconnections

between the

system modules

and

the radios

can be

routed through one system module

or the connections can

be

separate from both system modules

.

In concurrent operation

Flexi MR BTS is seen as two separate

logical network elements with common radio resources.

(24)

Flexi Multiradio BTS GSM/EDGE Architecture

Main functions of the modules

The System Module

is the center of the system. It has all the

external interfaces of the BTS (apart from the antenna interfaces).

Main functions of the System Module are the Transport, BTS O&M,

synchronization, power distribution and baseband processing

functions. System Module interfaces support up to four Radio

Modules with local power feed. Radio modules are connected to

System Module through RP3-01 interfaces.

The Radio modules and RRH’s

contain both RF BB and RF

functions. They are multistandard and multicarrier transceivers.

RF BB includes RP3-01 interface with multifunctional ASICs and

controller. In addition of TX/RX lineups module has integrated front

end. RFM front end will be implemented with SW tunable filters.

RRH will have fixed full band filters.

(25)

Smallest starting configuration with 2 modules:

System Module (ESMB/ESMC)

RF Module (RFM/RRH)

System Modules are GSM/EDGE compliant, and RF Module can be

shared with WCDMA/LTE in concurrent mode.

System Module (ESMB/C)

(transport)

3HU

Radio Frequency Module

3HU

Flexi Multiradio BTS GSM/EDGE Architecture

(26)

Flexi Multiradio BTS GSM/EDGE Architecture

Functionality of modules

Power module

(optional)

Optional

sub-module

Functionality of main modules with bypass or wideband combining

Power module

(optional)

System module

(transport)

Optical

OBSAI

Control

DC Power

BBU

E1/T1

Flexbus

Power

AC/DC

Abis IF

48 VDC

Software Tuned

filtering,

duplexing

Baseband

Processing

Multi Carrier PA

(RF Processing)

R

F

m

o

d

u

le

Eg. RFM

RF Baseband

Software Tuned

filtering,

duplexing

Multi Carrier PA

(RF Processing)

RF Baseband

Software Tuned

filtering,

duplexing

Multi Carrier PA

(RF Processing)

RF Baseband

(27)

BTS MGR

WCDMA

applic

Flexi Multiradio BTS GSM/EDGE Architecture

Flexi EDGE / Flexi WCDMA / Flexi Multiradio architectures comparation

GSM/EDGE

applic

O&M

CTRL (Control Plane)

Synchronization

RF

BB (User Plane)

Transport

Power

Flexi WCDMA

System

Module

Flexi EDGE

System

Module

TRX

Module

RF

Module

Multiradio

GSM/EDGE

applic

System

Module

RF

Module

Optical OBSAI

Ethernet

(electric)

Flexi Multiradio

(28)

Flexi Multiradio BTS GSM/EDGE Architecture

New Flexi Multiradio Modules

Radio Module/RRH products :

• RFM (Radio Frequency Module):

• FXCA: 850MHz; FXDA: 900MHz (E-GSM)

• FXDJ: 900J-band (CDMA costing)

• FXEA: 1800MHz; FXFA: 1900MHz

• RRH (Radio Remote Head):

• FHDA: 900MHz; FHEA: 1800MHz

All radios are multi standard & multicarrier capable supporting:

 GSM / EDGE / eEDGE up to 6 carriers per pipe

 WCDMA up to 4 carriers per pipe

 LTE up to 20MHz

Flexi Multiradio BTS EDGE System Module

(ESMB/ESMC)

System Module is 2G specific, but can operate together with

3G/LTE system module in the same system. System module

supports max. 36 EDGE carriers. Two separate product

variants will be developed:

ESMB for 18 carriers; ESMC for 36 carriers

Flexi Multiradio BTS 3*60W Radio Module (FXxA)

Flexi Multiradio BTS 2*40W Single sector

Remote Radio Head (FHxA)

(29)

Flexi Multiradio BTS GSM/EDGE Architecture

Flexi Multiradio with WCDMA/LTE (concurrent RF WCDMA/GSM

or LTE/GSM)

BTS control

GSM SW

WCDMA/LTE SW

BTS control

FDD WCDMA or

LTE SW

Baseband

FDD WCDMA

or LTE SW

New Flexi Multiradio EDGE System Module (ESMB or ESMC)

Transport

ATM/IP SW

Transport

TDM SW

IF: E1/T1

IF: E1/T1/J1

IF: STM-1/OC-3

IF: FE/GbE

Baseband

GSM SW

Flexi rel. 2 SYS Module

Abis

IF: PWE

Rel. 2.2 RFM (RRH)

RF SW

IF: Flex Bus

Iub /

S1

(30)

Flexi Multiradio BTS GSM/EDGE Architecture

Flexi EDGE BTS vs Flexi Multiradio BTS GSM/EDGE

Flexi Multiradio BTS GSM/EDGE

Flexi EDGE BTS

Main Modules &

Functionality

ESMB/ESMC

Centralized baseband processing

Optical OBSAI for System Module to

RF Module connection

RF Module (FXxA) / Radio Remote

Head (FHxA

)

MCPA (Multi Carrier Power Amplifier),

no TX combining and BTS internal

RF-cabling

Generate maximum 6+6+6/4+4 TRXs,

with max 1 pipe is 60/40 Watts (47.8/46

dBm). Each pipe has one Tx/Rx and one

Rxdiv antenna port

Front end filter integrated to the radio

and SW tunable in RM

New variant of 3G

ESMA

Baseband Processing

Distributed to the DTRX

Ethernet cable used for

System Module to RF

Module connection

EXxA (Dual TRX)

Two independent TRX,

each max : 47 dBm (50

watts)

not compatible for 3G

ERxA (Dual Duplexer)

Two independent filtering

& duplexer with each has

one Tx/Rx antenna port

Need RF cabling

(31)

Content

Introduction of Flexi Multiradio BTS GSM/EDGE

Flexi Multiradio BTS GSM/EDGE Architecture

Flexi Multiradio BTS GSM/EDGE Modules

Flexi Multiradio BTS GSM/EDGE SW Compatibility

Flexi Multiradio BTS GSM/EDGE RF Configuration

Flexi Multiradio BTS GSM/EDGE Performance

Comparison

(32)

Flexi Multiradio BTS GSM/EDGE SW

Compatibility

(33)

Flexi Multiradio BTS GSM/EDGE SW Compatibility

Software Release naming

RG10 (BSS14):

EP3 (Flexi EDGE only)

Current main release of Flexi EDGE SW (EP3 MP4.0 to be released next)

EX3.1 (Flexi MultiRadio EDGE only)

 compatible with BSC SW S14 EP5.1

EX3.1 MP1.0 will contain

some features delayed from EX3.1 Pre-released 1

RG20 (BSC SW: S15):

EX4 (Flexi EDGE only)

For Flexi EDGE only, main new features: OSC + Packet Abis

Part of EX3.1 code also included but not compatible with Flexi MultiRadio EDGE.

RG25 (BSC SW: S15 EPx.0):

EX4.1 (Flexi MultiRadio EDGE and Flexi Edge)

Brings the new EX4 features also support for Flexi MultiRadio EDGE

Note: As before, it is always recommended to use the latest compatible BTS SW release to gain the benefits of

BTS SW corrections, even if it belongs to newer RG release.

(34)

Flexi Multiradio BTS GSM/EDGE SW Compatibility

Compatibility with BSC, NetAct, LMU, FIFA, and FlexiHub

Manager SW

Compatibility between Flexi Multiradio GSM/EDGE BTS, BSC, NetAct, LMU,

FIFA, and FlexiHub Manager SW

(35)

Flexi Multiradio BTS GSM/EDGE SW Compatibility

Compatibility with BTS Manager and functionality support

To ensure compatibility in functionality, it is recommended that the BTS

Manager and BTS SW are both from the same BTS release or CD of that

release

(36)

Flexi Multiradio BTS GSM/EDGE SW Compatibility

Compatibility with BSC and Surpass hiD 66xx Far-end PW

device SW

Compatibility between BTS, BSC and Surpass hiD 66xx Far-end PW device

SW

The SURPASS hiD 66xx product family consists of three products, the 6630,

the 6650 and the 6670 each supporting a different number of exchangeable

line interface cards.

(37)

Flexi Multiradio BTS GSM/EDGE SW Compatibility

Features supported by Flexi Multiradio BTS GSM/EDGE

Most of the functionality of Flexi Multiradio BTS GSM/EDGE in EX3.1 are the

same as for Flexi EDGE BTS at RG10 level, for detail please see

Feature

Description

document on

EX3.1 Pre1 release binder

.

Feature licence related to TRX hardware activation of Flexi Multiradio BTS

GSM/EDGE as follow:

(38)

Flexi Multiradio BTS GSM/EDGE SW Compatibility

Features Delayed in Flexi Multiradio BTS GSM/EDGE EX3.1

Pre-release 1

Following basic functionalities are

excluded

from the EX3.1 SW Pre-release 1

(30-Jun-2010) :

RFM Shared mode with WCDMA BTS (concurrent mode)

RFM Chaining

4-way diversity

IDD

Hot inserted RFM Module

PWE support (FIQA/FIYA in PDH mode only)

DFCA

LMU sync (needed for DFCA)

Length of optical cables limit to only these options (2m, 50m,100m,150m,200m)

RFM block/unblock (needed mainly for sharing)

Antenna Hopping

(39)

Content

Introduction of Flexi Multiradio BTS GSM/EDGE

Flexi Multiradio BTS GSM/EDGE Architecture

Flexi Multiradio BTS GSM/EDGE Modules

Flexi Multiradio BTS GSM/EDGE SW Compatibility

Flexi Multiradio BTS GSM/EDGE RF Configuration

Flexi Multiradio BTS GSM/EDGE Performance

Comparison

(40)

Flexi Multiradio BTS GSM/EDGE

System Module (ESMB/C)

(41)

Flexi Multiradio BTS GSM/EDGE System Module (ESMB/ESMC)

General Information (1/2)

The

Medusa BTS System Module (ESMB/ESMC)

is a

2G specific system

module

in the Medusa BTS.

Module has IP 65 protected with temperature range -35 to +55 degrees C

System Module is the centre of the system and has main functions include:

BTS Operations and Maintenance

Abis termination and Transport interfacing

Optical OBSAI connectivity and related multiplexing/chaining functions

Power distribution to the RF modules

High capacity GSM baseband functionality for up to 18/36 TRX

BTS Synchronization

(42)

Flexi Multiradio BTS GSM/EDGE System Module (ESMB/ESMC)

General Information (2/2)

There are two variants of Medusa System Module The difference is in the

capacity of integrated baseband processing:

ESMB

- up to

18 carriers

(TRXs) capacity (TRX IDs:

1 .. 18

)

ESMC

- up to

36 carriers

(TRXs) capacity (TRX IDs:

1 .. 36

)

BTS configuration (BCF) can include only one ESMB/ESMC unit

System Module variant is selected according to capacity requirements (no of carriers

(TRXs) to be supported)

More than one System Module can be configured in a single BTS site when the

Multi BCF / common BCCH feature is in use

(43)

Flexi Multiradio BTS GSM/EDGE System Module (ESMB/ESMC)

Construction and Interfaces

4 optical SFPs. OBSAI RP3-01 interface (3Gbps). (3 for RF modules, 1 for 3G/LTE system module connection

or ESMB/ESMC chaining or alternatively all 4 for RF modules)

48VDC BTS power input terminals

5 Power distribution I/Fs (4 for co-located RFMs, and 1 extra for any additional modules)

A slot for Integrated transport sub-module (various interface options available)

Ports for Power Module Alarms, Local Management and Q1

External Alarm Control port with 12 inputs and 6 outputs, or connectivity to EAC Ext. Module

Two ports for external synch. input or synch. extension to other co located base stations

Status-LED, Power LED and Power Push Button

Grounding terminal

FPA

Optical RP3 01

Synch

out

Synch

in

EAC

Q1

PWR

Transmission PIU

Power input

Ground

PWR PWR PWR AUX PWR

Status and Power LED

3 HU

LMP

FlexiPowerA

larm (FPA)

interface for

BBU alarms

(6 alarm

inputs)

EAC (External Alarm &

Control) interface

•12 alarm inputs

•6 control outputs

(44)

Flexi Multiradio BTS GSM/EDGE

RF Module (RFM/RRH)

(45)

Flexi Multiradio BTS GSM/EDGE RF Module (FXxA)

General Information (1/7)

RF Module (FXxA) consist of 3 independent branches (pipes), which is

optimized for 3 sector Macro BTS use.

Each branch (pipe) can transmit and receive multicarrier signals of multiple radio

technologies concurrently, therefore:

RF combining and BTS internal RF cabling is not needed (no need combining losses

in the Link Budget calculations)

Flexi EDGE TRXs cannot be reused for Multiradio BTS

RFM can be installed in stacks, cabinets, also mast-tops

FXxA

ESMB/ESMC

MCPA

T ri p le S T u F

MCPA

60W

Carrier7-12 Carrier1-6

60W

MCPA

Carrier13-18

60W

(46)

Flexi Multiradio BTS GSM/EDGE RF Module (FXxA)

General Information (2/7)

Each branch (pipe) contains:

The transmitter and receiver chains and the front end,

software tunable filters

Two receive chains to provide 2-way receive diversity

Integrated antenna line supervision and MHA support

OBSAI connectivity (optical 3 x RP3-1 interfaces)

Each transmitter and receiver is capable to carry

up to 6 carriers (TRXs)

Single RFM capacity is up to 18 carriers (TRXs)

(6+6+6)

Capacity extension can be done by installing

additional RFM.

MCPA – Multi Carrier Power

Amplifier

LNA – Low Noise Amplifier

RXMC – Receiver Multicoupler

(47)

Flexi Multiradio BTS GSM/EDGE RF Module (FXxA)

General Information (3/7)

RFM is a single band module. Separate FXxA modules for each frequency band are

supported by Flexi Multiradio BTS

RFM operational bandwidth in both UL and DL is limited:

20 MHz for 1900MHz

30 MHz for 1800MHz in UL and 20 MHz in DL

20 MHz for 900MHz

12.5 MHz for 900MHz J-band (P-GSM for CDMA co-sitting)

15 MHz for 850MHz

There is a SW tunable pass band filter on each branch of the RFM module which is

tuned automatically by the BTS SW. The filter tuning range covers the whole RFM

bandwidth but the simultaneous bandwidth is limited as shown above

RFM Type

Band

RX Freq.

Range

TX Freq. Range

GSM Channel

Numbers

3GPP operating

band

Duplex distance

FXCA

850MHz

806-849 MHz

851-894MHz

128-251

V, VI, XVIII and XIX

45 MHz

FXDA

900MHz

880-915 MHz

925-960 MHz

975-1023 ,0-124

VIII

45 MHz

FXDJ

900 MHz J-band

890-915 MHz

935-960MHz

1-124

VIII partially

45MHz

FXEA

1800MHz

1710-1785 MHz

1805-1880 MHz

512-885

III and IX

95 MHz

(48)

Flexi Multiradio BTS GSM/EDGE RF Module (FXxA)

General Information (4/7)

f1

Up to 6 GSM TRX´s per MCPA

f2

f3

f4

f5

f6

f1 5Mhz f2 5Mhz f3 5MHZ f4 5Mhz

Up to 4 WCDMA carriers per MCPA

Up to 20MHz LTE per MCPA

X=1.4/3/5/10/15/20MHz

F1

X Mhz

Up to 444 GSM +

max 10MHz LTE/WCDMA per MCPA

f2

f1

5Mhz

F

5Mhz

f1

f3

F1

f4

Each RFM branch (pipe) can support several carriers (frequency blocks for

WCDMA/LTE and virtual TRXs in case of GSM/EDGE) within the available RFM

bandwidth or the bandwidth can be shared between different technologies

Up to 6 carriers can be defined for GSM/EDGE (independently on RFM

bandwidth)

Carriers can be defined using 100 kHz frequency raster (minimum

400 kHz

of

the carrier separation needs to be kept between GSM/EDGE carriers)

(49)

Flexi Multiradio BTS GSM/EDGE RF Module (FXxA)

General Information (5/7)

In the

concurrent mode

there is a limited number of carrier configurations

supported by each RFM branch (pipe)

Dedicated SW features need to be used to enable RFM sharing between

different technologies (concurrent mode) - apart from the HW capabilities (max

no of carriers per pipe) the list of supported carrier combinations is determined

by the features

RG10/RU20

: RF sharing WCDMA – GSM

RG25/RL20

: RF sharing 2G – LTE

Frequency, BW (Tx/Rx)

850MHz, 15/15MHz

900MHz, 20/20MHz

1800MHz, 20/30MHz

1900MHz, 20/20MHz

GSM TRXs

6+6+6

6+6+6

6+6+6

6+6+6

WCDMA carriers

2+2+2

4+4+4

4+4+4

4+4+4

LTE bandwidth

1.4/3/5/10

1.4/3/5/10/15/20

1.4/3/5/10/15/20

1.4/3/5/10/15/20

Output power /sector

60W

60W

60W

60W

Concurrent mode(s)

supported by HW:

555 GSM+5MHz

444 GSM+10MHz

GSM/LTE

GSM/WCDMA

GSM/WCDMA/LTE

WCDMA/LTE

GSM/LTE

GSM/WCDMA

GSM/WCDMA/LTE

WCDMA/LTE

GSM/LTE

GSM/WCDMA

GSM/WCDMA/LTE

WCDMA/LTE

GSM/LTE

GSM/WCDMA

GSM/WCDMA/LTE

WCDMA/LTE

(50)

Flexi Multiradio BTS GSM/EDGE RF Module (FXxA)

General Information (6/7)

The nominal output power at the antenna connector for the 3-sector RFM is 60W

per branch (pipe)

The nominal output power at each branch (pipe) is the maximum cumulated sum

of output powers of all the carriers/TRXs within that branch

The output power per carrier of a radio branch decreases with the increasing number

of carriers in the radio branch

The output power of each carrier/TRX within the branch can be adjusted separately

The carriers can be split to multiple radio branches within one sector

to increase

the output power and thus the BTS coverage

GMSK

8PSK

16/32QAM

1

1

+47.8 dBm (60 W)

+47.8 dBm (60W)

+47.8 dBm (60W)

2

1

+44.8 dBm (30 W)

+44.8 dBm (30 W)

+44.8 dBm (30 W)

3

1

+43.0 dBm (20 W)

+43.0 dBm (20 W)

+43.0 dBm (20 W)

4

1

+41.8 dBm (15 W)

+41.8 dBm (15 W)

+40.6 dBm (11.6 W)

5

1

+40.8 dBm (12 W)

+40.5 dBm (11.2 W)

+38.7 dBm (7.4 W)

6

1

+40.0 dBm (10 W)

+38.9 dBm (7.8 W)

+37.2 dBm (5.2 W)

8

2

+41.8 dBm (15 W)

+41.8 dBm (15 W)

+40.6 dBm (11.6 W)

10

2

+40.8 dBm (12 W)

+40.5 dBm (11.2 W)

+38.7 dBm (7.4 W)

12

2

+40.0 dBm (10 W)

+38.9 dBm (7.8 W)

+37.2 dBm (5.2 W)

Output power 900 MHz / 1800 MHz

No of carriers (TRXs) per sector No of RM branches per sector

(51)

Flexi Multiradio BTS GSM/EDGE RF Module (FXxA)

General Information (7/7)

Receive sensitivity to be the same

as with existing Flexi EDGE BTS

In case of concurrent mode the nominal output power at each branch (pipe) is

shared between carriers of different technologies

There is a fixed share of the nominal output power of each branch (pipe) between

technologies

Then, the output power dedicated to each technology is distributed among defined

carriers (GSM) or limited according to installed license (LTE)

Dedicated SW features need to be used to enable RFM sharing between different

technologies

RG10/RU20

: RF sharing WCDMA – GSM

RG25/RL20

: RF sharing 2G – LTE

Maximum output power per carrier is determined by supported in the feature RF

configurations

The target receiver sensitivity of Flexi Multiradio BTS is to be at least the same

as of the existing Flexi EDGE

(52)

Flexi Multiradio BTS GSM/EDGE RF Module (FXxA)

Construction and Interface (1/2)

FAN/ Status TX Module

OPT 1 OPT 2 OPT 3

FAN/ Status TX Module

OPT 1 OPT 2 OPT 3

900/1800 Version

(53)

3 RP3-01 OBSAI 3 Gbps interfaces

3 TX/RX Antenna Interfaces (including AISG 2.0 support, Bias-T

and VSWR meas)

3 RX Antenna Interfaces (including Bias-T)

3 Co-siting RX outputs

48V DC PWR input

External Alarm interface

PWR IN Ant 6 Rx Ant 5 Tx/Rx Ant 3 Tx/Rx Ant 1 Tx/Rx Ant 4 Rx Ant 2 Rx Ant 1 Rx Out Ant 3 Rx Out Ant 5 Rx Out

EAC OPT 1 OPT 2 OPT 3

Fan / RF Off Unit CLASS 1 LASER PRODUCT

External Interfaces

Flexi Multiradio BTS GSM/EDGE RF Module (FXxA)

(54)

Flexi Multiradio BTS GSM/EDGE

Radio Remote Head (RRH)

(55)

Flexi Multiradio BTS GSM/EDGE Radio Remote Head

(RRH)

- General Information

Optimized for

1 sector Macro BTS use

.

Supports

MIMO

with SW upgrade

3G/LTE Upgrade

with System Module change/addition &

multimode SW

Two individual branches

for transmitting and receiving

Integrated

Duplex-filter

& integrated

OBSAI RP3-01

interface

Maximum

2*40W

output power per TRX

Dedicated

and

concurrent

mode

Flexible power and bandwidth allocation between the

radio technologies controlled by operator

Compliant to MC BTS (

Class 2

) 3GPP specification

For MC BTS Class 1 the following relaxations apply:

Number of the carriers/branch: Up to 3 carriers

Total output power/branch: Up to 40W (1dB tolerance

allowed)

Frequency variants for

900MHz and 1800MHz

RRH

< 17 kg (target)

IP65

-35 to +55 °C

X

LNA D u p lex er

MCPA

TX RX LNA D u p lex er

MCPA

TX RX

RRH

(56)

Flexi Multiradio BTS GSM/EDGE Radio Remote Head

(RRH)

Construction and Interface

2 RP3-01 OBSAI 3Gbps

interfaces

2 TX/RX duplex Antenna

Interfaces

48V DC input, integrated class

OVP

External Alarm inputs (min 2

pcs)

AISG 2.0 interface for RET

LMP/test port

(57)

Flexi Multiradio BTS GSM/EDGE Transmission

sub-module

(58)

Transmission Submodule

Integrated Transport (ITN)

There are 5 separate plug-in units responsible for Abis interface (the same as

used in ESMA – Flexi EDGE System Module)

FI

P

A

8*E1/T1 symmetrical; RJ48 connector

FI

E

A

8*E1 asymmetrical; SMB connector

FI

F

A

2*Flexbus; TNC-type 50

Ω coaxial connector

FI

Q

A

1*SFP port, 2* Fast Ethernet; RJ45 connector

4*E1/T1 symmetrical; RJ48 connector

FI

Y

A

1*SFP port, 2* Fast Ethernet; RJ45 connector

4*E1/T1 asymmetrical; SMB connector

FIPA

FIEA

FIFA

FIQA

FIYA

ESMB/ESMC

(59)

Flexi Multiradio BTS GSM/EDGE Power Options

(optional)

(60)

System module distributes power to

other modules

All modules generate own internal

voltages

BTS powering may be supplied from:

Flexi Power AC/DC module

(FPMA)

(with or without battery)

providing 48VDC input to the power

distribution

Flexi Power DC/DC module (FPDA)

(24/48VDC)

Multi Integrated Battery Back-up

(MIBBU)

Flexi Power Rectifier Module

(FPRA)

48VDC

RF module

RF module

RF module

System module

Flexi BTS Power Options

Distributed power supply

(61)

Power module provides the casing and cable connectors for 4 power sub-modules

input / output terminals, output DC and alarm cables

Flexi Power AC/DC 200-240 V AC sub-module (FPAA)

200-240 V AC  48V DC converter

0…4 FPAA per Power module;

1kW

power each

includes AC-filters

Flexi Power Battery sub-module (FPBA)

gives minute-level back-up when AC mains are down

0…3 FPBA per FPMA

+

-48VDC output

to BTS

AC input cabling to

FPMA

AC feed to

FPAA (3pcs)

Flexi BTS Power Options

(62)

Optional DC/DC converts from external

24V DC to internal 48V DC

1 DC-DC module gives up to

2kW power

, e.g. 2 DC-DC modules

are required for 12 TRX configuration

Useful in swap-out scenarios

48V DC output

24V DC input

Flexi BTS Power Options

(63)

Flexi BTS Power Options

Flexi Power Rectifier (

FPRA

) (1/3)

Is a new type of MIBBU

Provides the 48VDC voltage from external AC or DC voltage (batteries)

Compatible with Flexi BTS 19” mechanics and 3HU high. Can be used in Flexi cabinet

installations and without a cabinet.

Brings some new possibilities for Flexi applications:

FPRA outside FCSA => more LTE space inside FCSA

FPRA inside FCOA => more space for Flexi modules inside the cabinet as no need for FCSA

Consists of:

mechanics mountable to a 19” frame

Power distribution unit with scalabe outputs for max. 2 BTSs and max. 3 battery strings

Control Unit (CU) for controlling the FPRA. Alarms generated by CU are normal EAC-alarms

and can be connected to ESMA via the standard EAC-interface or power alarm interface (FPA).

Max. three 2 kW rectifiers (i.e. max output 3 * 2 kW = 6 kW)

Operating temperature range -33 to +55C

Wide operating voltage range: from 85 to 310VAC

Optional separate batteries (no space for batteries inside the FPRA module)

IP55 compatible, suitable for use in an outdoor cabinet without FCSA module and for

(64)

IP54 Rectifier Module

FPRA with/without Flexi

covers (FMCA)

Casing with integrated DC distribution for

rectifiers (provides IP55 protection to controller

and rectifier modules when fitted with Flexi

covers)

Flexi BTS Power Options

(65)

FCSA

Any 3

rd

party 19” ID cabinet

Wall/Pole installation

Stack installation

Together with battery box

(Floor/wall/stack)

UltraSite ID cabinet

(roof mounting)

Flexi BTS Power Options

(66)

Separate full-blown battery backup system in its own cabinet with

high power, backup capacity and long backup times can be used for

bigger configurations and long backup times.

Flexi BTS Power Options

(67)

Content

Introduction of Flexi Multiradio BTS GSM/EDGE

Flexi Multiradio BTS GSM/EDGE Architecture

Flexi Multiradio BTS GSM/EDGE Modules

Flexi Multiradio BTS GSM/EDGE SW Compatibility

Flexi Multiradio BTS GSM/EDGE RF Configuration

Flexi Multiradio BTS GSM/EDGE Performance

Comparison

(68)

Flexi Multiradio BTS GSM/EDGE RF

Configuration

(69)

Up to 18 GSM TRX; 3 sector support; 3x 60W@antennaconnector

Flexible capacity increase from small to very large configurations

Up to 6 cells with 1-12 TRX/cell; Up to 36 TRX per BTS (BCF)

Up to 108TRX (36+36+36) in one sits using Multi BCF/common BCCH

Very High capacity sites possible without any cabinets

Antenna Optimized Configurations

Frequency bands

GSM 850, 900,1800, 1900

Single and Dual Band Configurations

Min GSM configuration

6/6/6, 2 modules

Max GSM configuration (Multi BCF)

up to

36/36/36, 9 modules

Max GSM configuration/BCF

36 TRX, 3 modules

FXxA ESMB ESMC FXxA FXxA ESMC FXxA FXxA ESMC FXxA FXxA ESMC FXxA FXxA

Flexi Multiradio BTS GSM/EDGE RF Configuration

(70)

Flexi Multiradio BTS GSM/EDGE RF Configuration

Radio Connection principle - Optical RP3 01 interfacing between

SM and RFM

Single RM

GSM SM

RFM 900/1800

2 Chained* RMs, Single/Dual Band

GSM SM

RFM 900/1800

RFM 900/1800

2 unchained RMs, Single/Dual Band

GSM SM

RFM 900/1800

RFM 900/1800

OBSAI

*Single Technology Chained configurations will be supported with the

first Multiradio Maintenance Release (LE P1 2010)

Optical OBSAI RP3 01 interface between System

Module and RF Module/RRH

Several RF Modules can be simultaneously connected

to GSM System Modules in the Base Station

The Radios can be in the same or different bands

Radio Connections options

Separate RP3 01 connections to the system modules (up

to 4 RF Modules can be connected to the system Module

Chained* radios (Up to 3 Radios can be chained together

in one chain)

(71)

Flexi Multiradio BTS GSM/EDGE RF Configuration

Radio Connection principle - Optical RP3 01 interfacing between

SM and RFM

4 unchained RM, Single Band

GSM SM

RFM

RFM

RFM

RFM

4 unchained RM, Dual Band

GSM SM

RFM 900/1800

RFM 900/1800

RFM 900/1800

RFM 900/1800

•2 RM in GSM 900 and 2 in 1800 •3 RMs in 1800 and 1 in 900 •3 RMs in 900 and 1 in RM in 1800

3 Chained* RMs, Single/Dual Band

GSM SM

RFM 900/1800

RFM 900/1800

RFM 900/1800

GSM SM

RFM 900/1800

RFM 900/1800

RFM 900/1800

(72)

Flexi Multiradio BTS GSM/EDGE RF Configuration

Radio Connection principle - Optical RP3 01 interfacing

between SM and RRH

3 Chained* RRH

GSM SM

RRH 900/1800

RRH 900/1800

RRH 900/1800

GSM SM

RRH 900/1800

RRH 900/1800

RRH 900/1800

3 unchained RRH

Single sector

GSM SM

RRH

OBSAI

(73)

Flexi Multiradio BTS GSM/EDGE RF Configuration

Common Sector Configuration

# of carriers (2G-3G)

Max Tx Power

Antenna optimized

# of RF branches

(pipes)

# of antennas

1

60

No

1

1 or 2

2

30

No

1

1 or 2

3

20

No

1

1 or 2

4

15

No

1

1 or 2

6

10

No

1

1 or 2

2

60

Yes

2

2

4

30

Yes

2

2

6

20

Yes

2

2

8

15

Yes

2

2 or 4

12

10

Yes

2

2 or 4

6

30

Yes

3

2 or 4

1 (2G) – 1 (3G)

40 – 20

No

1

1 or 2

20 – 40

2 (2G) – 1 (3G)

20 – 20

No

1

1 or 2

10 – 40

3 (3G) – 1 (3G)

10 – 30

No

1

1 or 2

2 (2G) – 1 (3G)

20 – 40

Yes

2

2 or 4

4 (2G) – 2 (3G)

20 – 20

Yes

2

2 or 4

1 IDD

60

Yes

2 or 4

2

2 IDD

60

Yes

2 or 4

2

4 IDD

30

Yes

2 or 4

4

(74)

Flexi Multiradio BTS GSM/EDGE RF Configuration

Common configurations – Dedicated 2G Configuration

Configurations

)

# of FXxx

# of ESMB/C

# of FPAA *)

**)

# of FPDA *)

#

antennas

Unchained RF

Module 1+1+1 up to6+6+6 2UD

1

1

2

1

6

Two chained RF #)

Modules 2+2+2 up to 12+12+12 2UD

2

1

3

2

12

Three chained RF #)

Modules 3+3+3 up to 12+12+12 2UD

3

1

4

2

18

Two unchained RF

Modules 2+2+2 up to 12+12+12 2UD

2

1

3

2

12

Three unchained RF

Modules 3+3+3 up to 12+12+12 2UD

3

1

4

2

18

Four unchained RF

Modules 4+4+4 up to 12+12+12 2UD

4

1

5

3 ***)

24

*) Optional depending on the external power source. The number of power modules is based on maximum power consumption

and does not account for redundancy.

**) One FPMA supports up to four FPAAs. FPBAs may also be installed in the FPMA.

***) An FSEC is also required since a maximum of two FPDAs can be installed in parallel for each System Module.

#) Chained configuration is not supported at the moment by RG10 (S14 EP5.1) with EX3.1 Pre release 1

(75)

Flexi Multiradio BTS GSM/EDGE RF Configuration

Common configurations – Antenna Optimized

Configurations

)

# of FXxx

# of

ESMB/C

# of FPAA

*) **)

# of FPDA

*)

#

antennas

One RF Module

antenna optimised 2

up to 12 OMNI 2UD

1

1

2

1

12

Two chained RF #)

Modules antenna optimised

2+2+2 up

to 12+12+12 2UD

2

1

3

2

12

Three chained RF #)

Modules antenna optimised

3+3+3 up

to 12+12+12 2UD

3

1

4

2

18

*) Optional depending on the external power source. The number of power modules is based on maximum power consumption

and does not account for redundancy.

**) One FPMA supports up to four FPAAs. FPBAs may also be installed in the FPMA.

(76)

Flexi Multiradio BTS GSM/EDGE RF Configuration

RF Configurations with single RF Module

X

X

X

LNA

LNA

D

u

p

lexer

RX

MCPA

TX

RX main

RX div

LNA

LNA

D

u

p

lexer

RX

MCPA

TX

RX main

RX div

LNA

LNA

D

u

p

lexer

RX

MCPA

TX

RX main

RX div

RM

RXMC

RXMC

RXMC

Cross

polarized

antennas

Up to 666 with 1 Radio Module

2 way diversity, 6 antenna ports/module

1 x Pol antenna per sector

Output Power

1/1/1 @ 60W per TRX

2/2/2 @ 30W per TRX

3/3/3 @ 20W per TRX

4/4/4 @ 15W per TRX

6/6/6 @ 10W per TRX

RP3

Note: Asymmetric powers per TRX are also supported e.g, 4/4/4

(77)

Flexi Multiradio BTS GSM/EDGE RF Configuration

Single band RF Configurations with 2 RF Modules (one sector

shown)

Chained or unchained RMs

1 x Pol antenna per sector**

Output Power

2/2/2 @ 60W per TRX

4/4/4 @ 30W per TRX

6/6/6 @ 20W per TRX

8/8/8* @ 15W per TRX

12/12/12* @ 10W per TRX

X

LNA

LNA

D

u

p

lexer

RX

MCPA

TX

RX main

RX div

RM1

RXMC

LNA

LNA

D

u

p

lexer

RX

MCPA

TX

RX main

RX div

RM2

RXMC

* With ESMC

**Both the branches must be tuned to the same RF Frequency Range

Antenna Optimized Configuration

- The sectors are spread over 2 RMs to allow maximum availability

- If one RM becomes unavailable, the total traffic gets reduced and RX Diversity would be lost

RP3

RP3

(78)

Flexi Multiradio BTS GSM/EDGE RF Configuration

Single Band RF Configurations with 3 RF Modules (one sector

shown)

Chained or unchained RMs

Antenna optimized**

3 antenna Lines per sector

Output Power

3/3/3 @ 60W per TRX

6/6/6 @ 30W per TRX

12/12/12* @ 15W per TRX

X

LNA

LNA

D

u

p

lexer

RX

MCPA

TX

RX main

RX div

RM1

RXMC

LNA

LNA

D

u

p

lexer

RX

MCPA

TX

RX main

RX div

RM2

RXMC

LNA

LNA

D

u

p

lexer

RX

MCPA

TX

RX main

RX div

RM3

RXMC

* With ESMC

RM1 Rx

RM2 DRX

RM2 Rx

RM3 DRX

RM3 Rx

RM1 DRX

Antenna Optimized Configuration

The sectors are spread over 3 RMs to allow

maximum availability

If one RM becomes unavailable, the traffic capacity

would decrease and RX Diversity would be lost for 1

RM

RP3

RP3

References

Related documents

The terms used in the search engine are cost benefit analysis, road, construction, transport, projects, cost overrun, uncertainty, and risk.. To hit the appropriate articles in

► Patients at high risk for thrombosis should have bridging treatment dose LMWH, these include: patients with a venous thromboembolism within the previous 3 months, or

The global digital farming market is expected to grow over the forecasted period owing to factors such as rising world population, rapidly decreasing arable land, growing global

The Virginia Department of Transportation (VDOT) and the Rappahannock-Rapidan Regional Commission are partnering to evaluate the rural transportation system in the region and

One characteristic of older posters is that they can be likened to “wall newspapers.” Illustrated posters often have an artistic quality; it is unclear whether or not that

• West Nile virus (WNV) is a mosquito-borne infectious disease, transmitted to humans through the bite of an infected mosquito, usually of the genus Culex5. • Human WNV infection

Particularly of interest are the PAP12 and PAP8 proteins for which the only domains that can be recognized are the chloroplast transit peptide and the nuclear localization signal,

The paper presents the results of an empirical analysis, which shows that in Armenia women face discrimination in family and workplace, have less opportunities of