anuj final report

8/6/2019 Anuj Final Report

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International Institute of Information

Technology

Bangalore

Internship Report

GLOBAL INNOV SOURCE

An Internship Report

Submitted in Partial fulfilment for the Award of

Post Graduate Diploma in Software Development

Prepared by:

Anuj Singh

(PD2009511)


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CERTIFICATE

This is to certify that the internship report titledNOKIA FLEXI BTS submitted by

Anuj Singh (PD2009511)

Is a bonafide work carried out under our supervisions at

Global Innov Source

From 4th October to 31stDecember 2010, in partial fulfilment of the Post Graduate Diploma

in

Software Development Course of International Institute of Information Technology,Bangalore.

His Performance & conduct during the project was satisfactory.

Signature:

Name of the Supervisor: Kundan Singh

Date: 31/12/2010

Place: Ranchi


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ACKNOWLEDGMENT

I take the opportunity to express my cordial gratitude and deep sense of indebtedness to my

guide Sumit Chand for his valuable guidance. I am thankful for his innovative ideas. He

always welcomed my problem and helped to clear my doubt. I will always be grateful to him

for providing me moral support and sufficient time. Last, but not the least, my heartfelt

thanks to IIIT-Bangalore Faculties and friends, who helped me in many ways during the

course of my internship.

Anuj Singh

(PD2009511)


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TABLE OF CONTENTS

ABSTRACT

ABOUT GLOBAL INNOV SOURCE

TECHNICAL OVERVIEWOF FLEXI EDGE BTS

CONSTRUCTION AND MODULES

APPLICATION AND CONFIGURATION

TRANSMISSION

CO-SITING

TECHNICAL DATA


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ABSTRACT

The main focus of the internship program was to learn and understand the Nokia flexi BTS

and get hands on experience of working and functionality of Nokia Flexi BTS

In the technical overview we have given the introduction to Nokia Flexi BTS, its installation,

capacity and performance, how to increase the speed of network roll out and reduced

operating costs and also how Nokia Flexi BTS platform is used efficiently in multi-radio

sites.

In construction and modules we have learnt what the main modules of Nokia Flexi BTS i.e.

about systems modules, transmission modules, TRx modules and duplexer modules.

In configuration and applications we have learnt about various configurations of modules and

capacity and working.

In transmission we have learnt about various transmission platform and transmission

interface upon which Nokia Flexi BTS can work upon.

In co-siting we have learnt with which Nokia Flexi BTS can be co-sited.

In feeder less and distributed site we came to know about feeder less and distributed sites

working and its benefits.

In technical data part we have came to know about Nokia Flexi BTS operating range and

power consumption done by it


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ABOUT GLOBAL INNOV SOURCE

Global InnovSource, Indias largest staffing company is committed to advancement of HR

solutions to growing companies. A venture of the Global Group Enterprise

(www.globalgroupenterprise.com), Global InnovSource is the Group's HR venture. Among

Global Group's listed flagship ventures are GTL Limited (www.gtllimited.com) and GTL

Infrastructure (www.gtlinfra.com). The group has investments concentrated in the Telecom,

Wireless, Infrastructure, Aviation, Projects and Outsourcing spaces, and is fast diversifying

into other areas.

Global Innov Source is an End-to End HR-Solutions company, focused on enhancing the

performance of your organization by leveraging our experience in managing your talent and

HR processes.

Present across 30 centers, its associates are spread across over 200 cities across India. Global

InnovSource offers Staffing Solutions, Recruitment Solutions and Facility Management.

Our services and solutions are spread around making your people experience easy and

affordable. We offer the following services.

Staffing Solutions - addressing your dynamic project staffing requirement

Recruitment Solutions - addressing your quality manpower requirement

Facilities Management - addressing your Facilities management requirement


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CHAPTER 1. TECHNICAL OVERVIEW OF FLEXI EDGE BTS

This section gives a technical overview of Nokia Flexi EDGE BTS.

1.1 Introduction

Nokia Flexi EDGE BTS is a modular base station for GSM/EDGE capacity and coverage. Its

modular design makes site acquisition and installation easier, reducing the time needed for

rolling out network coverage in a new area. Nokia Flexi EDGE BTS allows using existing

site space sparingly and efficiently. Nokia Flexi EDGE BTS introduces GSM/EDGE modules

to the Nokia Flexi BTS family. Nokia Flexi EDGE BTS is based on the same Nokia Flexi

platform as Nokia Flexi WCDMA BTS, enabling efficient multiradio sites including

GSM/EDGE and WCDMA/HSPA and other radio technologies such as WiMAX in the

future.

1.2 Easy installation

With Nokia Flexi EDGE BTS, weatherproof modules and casings are used to build base

stations and a dedicated BTS cabinet is not necessary. The modules used without a cabinet

are environmentally protected (IP55 compliant) and, due to a broad operational temperature

range, suitable for varied climatic conditions. A fully functional macrocellular BTS consists

of only two logical modules which can be carried by one person. Capacity can be expanded

simply by adding modules. With Flexi EDGE BTS, it is possible to upgrade remotely with

the license mechanism, provided the HW required for the configuration is already installed.

That is, the installed BTS HW is configured as upgrade optimised configuration (see Nokia

Flexi EDGE BTS Feature Descriptions document). The same modules are used in indoor andoutdoor sites for macro-cellular and microcellular solutions. The modules can be installed on

floor, wall, or pole.


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1.3 Capacity and performance

Nokia Flexi EDGE BTS is highly integrated. For example, it supports up to 24 TRXs (12

Dual TRXs) in the volume of a traditional single BTS cabinet. There is virtually no limit to

site capacity, due to synchronised Nokia FlexiEDGE BTS chaining.

Nokia Flexi EDGE BTS provides top-of-class RF performance with balanced link, similar to

existing Nokia UltraSite EDGE BTS. In standard Capacity mode, it provides TRX output

power of 47 dBm (ca. 46 dBm at BTS antenna port in combiner by-pass configuration) and

system sensitivity of -115.5 dBm. Double Power TRX and coverage features secure an even

higher performance for coverage-limited environments.

1.4 Increased speed of network roll-out and reduced operating costs

Nokia Flexi EDGE BTS can minimise BTS site rental costs as a BTS specific cabinet is no

longer needed. The floor space required for large configurations is reduced, or in case of wall

installation, not needed at all. The existing site support and auxiliary cabinets with sufficient

space and cooling can be used to house the modules, further increasing the efficiency of site

space.

When it comes to rectifier and battery maintenance, the reduced power consumption enables

the use of smaller power systems with fewer batteries. If lithium batteries are used, the

maintenance interval is longer. The traditional batteries require regular maintenance twice a

year.

When it comes to site maintenance, there are advantages compared to the current BTS

solutions. Diesel generators need to be started less frequently, as the batteries supply the base

station for a longer period of time compared to old BTSs. New installation options make it

possible to install the base stations to places that are better protected against vandalism and

natural catastrophes. This means that less shelter maintenance is required.


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1.5 Common Nokia Flexi platform for efficient multi-radio sites

Common Nokia Flexi multimode platform for GSM/EDGE and WCDMA/HSPA ensures that

high capacity multimode sites can be built smoothly and cost-effectively. Evolution from

GSM/EDGE to WCDMA/HSPA and to further radio technologies such as WiMAX can be

ensured rapidly and with minimal effort. With Nokia Flexi platform, the site design and

capacity expansion principles are the same. GSM/EDGE and WCDMA/HSPA modules are

the same size and follow the same installation principles, which increase efficiency, as the

same installation teams can be used for different radio technologies. The modules can be

installed into the same stack or they can share the same BTS cabinet. Battery backup systems

(BBU), site accessories, and transmission can also be shared.


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CHAPTER 2. CONSTRUCTION AND MODULES

2.1. Main modules

A functional Nokia Flexi EDGE BTS can be built with just two logical modules: Nokia Flexi

EDGE System Module and Nokia Flexi EDGE Sector Module. The Sector Module is a

logical unit consisting of two building blocks: Dual TRX Module (EXxA) and Dual Duplexer

Module (ERxA). Typically one Sector Module is needed per sector. Sector expansions are

done just by adding more Dual TRXs and optional Wideband Combiners (WBCs). Another

option is to use the Remote Tune Combiner Module together with Dual TRX Modules; the

Dual Duplexer Module is then not needed.

2.1.1. Nokia Flexi EDGE System Module (ESMA)

The System Module is a unit providing BTS common functionalities and external and

internal connections for the whole BTS. The BTS software is stored in the System Module.

The System Module also receives and stores the unit identification information of all other

units of the BTS. The System Module supports configurations to up to 12 TRXs. For larger

configurations, the System Extension Module is used.

The main functions of the System Module are:

BTS O&M

BTS integrated transport

System bus control and module synchronisation

Power distribution (48 VDC) to other modules

The following plug-in transmission sub-module variants are available for the Flexi EDGE

System Module (ESMA). There is space for one transmission sub-module in the System

Module.


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E1/T1 transmission sub-module (FIPA)

The FIPA offers eight balanced E1/T1-interfaces.

E1 transmission sub-module (FIEA)

The FIEA offers eight unbalanced E1-interfaces.

FlexBus transmission sub-module (FIFA)

The FIFA offers two Flexbus-interfaces connecting radiolinks that belong to the

Nokia Hopper-family. FIFA can also be used for connecting other transmission

devices offering Flexbus-interface.

Abis over IP Ethernet and E1/T1 (FIQA)

The FIQA sub-module offers two Fast Ethernet-, one Gigabit Ethernet- and four

balanced E1/T1-interfaces. SFP module is required for Gigabit Ethernet.

Abis over IP Ethernet and E1 (FIYA)

The FIYA sub-module offers two Fast Ethernet-, one Gigabit Ethernet- and four

unbalanced E1 -interfaces. SFP module is required for Gigabit Ethernet.

2.1.2. Nokia Flexi EDGE Dual TRX Module (EXxA)

The Dual TRX Module (EXxA) is a two-carrier TRX unit. The module contains the common

(2 carrier) baseband part and two separate RF parts for two transceivers (transmitter andreceiver chains) and space for two optional Wideband Combiners (WBC).

The Dual TRX Module is used as:

A combined module with the Dual Duplexer Module (ERxA), making a logical

Sector Module

or A stand-alone TRX module with the Remote Tune Combiner (RTC) module

or A stand-alone extension TRX module.


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The Dual TRX Module and System Module communication is managed through a single

Ethernet interface. Each transceiver within the Dual TRX Module can be separately activated

with a licence key at the BSC.

The Dual TRX Module contains two transceivers that can be used:

as a separate TRX in the same sector (TRXs in the Sector Module are always in the

same sector),

as a separate TRX in different sectors (the TRX in the extension Dual TRX Module

can be connected to two sectors via different Sector Modules)

as a Double Power TRX (synchronised combining of transmitters of both TRXs gives

a TRX with double output power and single TRX capacity).

or as an Intelligent Downlink Diversity (IDD) TRX.

There are separate Dual TRX Modules for each frequency band that Nokia Flexi EDGE BTS

supports:

EXTA GSM800; EXDA GSM1800; EXGA GSM900; EXPA GSM1900

2.1.3. Nokia Flexi EDGE Dual Duplexer Module (ERxA)

The Dual Duplexer Module and the Dual TRX Module create one Sector Module. A

minimum of one Dual Duplexer Module (both Antenna ports) is needed per sector to enable

diversity. The Dual Duplexer Module is always attached to the Dual TRX Module, which

provides the Dual Duplexer Module with power feeding and O&M link. Extension Dual TRX

Modules are installed without the Dual Duplexer Module.

The role of the Dual Duplexer Module is to provide the duplex functionality to combine TX

and RX signals in a common antenna feeder. The Dual Duplexer Module provides two

antenna connections (configured from 1 or 2 sectors) of Nokia Flexi EDGE BTS for by-pass

and wideband combined configurations. The Dual Duplexer Module supports antenna

sharing (cositing) with another BTS.


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CHAPTER 3. APPLICATIONS AND CONFIGURATIONS

3.1 Capacity solutions

In urban and suburban areas, operators typically provide the mobile services, including voice

and data, from high capacity macro-cellular sites. In urban environments, large mobile traffic

hot spots must be covered, often requiring very high site configurations. In suburban

locations, there is a simultaneous need for high capacity and cost-effective area coverage.

The radio equipment best suited for these locations has excellent radio performance. In

addition, it has the ability to expand smoothly from small to very large capacities, using the

site space sparingly in order to keep site running costs at minimum.

Nokia Flexi EDGE BTS allows building very high capacity macro-cellular sites, taking only

little site space even with large configurations. Up to 24 TRX configurations can be built in

the volume of a traditional BTS and with one BCF object.

The carrier capacity of Nokia Flexi EDGE BTS can be flexibly dimensioned according to the

expected traffic by increasing the number of Dual TRX Modules. Each Dual TRX Module

supports two GSM/EDGE TRXs. When expanding capacity, the two TRXs in one Dual TRX

Module can be connected to different sectors. With licence keys, it is possible to commission

a single TRX of the DTRX module if necessary.

Nokia Flexi EDGE BTS offers flexible combining options to increase the BTS capacity

without a need to add the number of BTS antennas. Transport capacity can be configured

independently of the air interface capacity. This enables building initial coverage with limited

capacity transmission infrastructure.

Nokia Flexi EDGE BTS supports virtually unlimited site capacity. Up to nine BCFs can be

chained.


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CHAPTER 4. TRANSMISSION

4.1. Overview of Flexi EDGE BTS transmission

The Nokia Flexi EDGE BTS integrated transmission function is located in Flexi EDGE

System Module (ESMA). There is space for one transmission sub-module in the System

Module. Different transmission sub-modules are used depending on the needed interface.

The Nokia Flexi EDGE BTS has been optimized for tail and chain sites. In case more

transmission interfaces or media conversion is needed the FlexiHub (or FIU19E) can be used

as a transmission hub for Nokia Flexi BTS product family.

Transmission sharing in co-sited Nokia Flexi EDGE BTS and Nokia Flexi WCDMA BTS is

described in Nokia Flexi EDGE BTS Co-siting.

4.2. Transmission interfaces

The Nokia Flexi EDGE BTS supports two different transmission Medias: radio link and wire

line.

Radio link transmission

The FIFA is the radio link transmission sub-module for the BTS. The FIFA has two Flex bus

interfaces for connecting:

one or two Nokia microwave radio outdoor units

two FIFA sub-modules in different BTSs

one Flex bus interface to another transmission device offering a Flex bus interface

(such as Flexi Hub, FIU19E, Ultra Site EDGE, Ultra Site WCDMA or Flexi

WCDMA).


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The proprietary Nokia Flex bus uses a coaxial cable with following functionalities:

it carries power for the radio outdoor unit

it carries a maximum of 16 x 2 Mbit/s in both directions

it has a maximum cable length of 300 metres

it is compatible with Nokia Flexi Hopper Microwave Radio and Nokia Metro Hopper

Radio

4.3. Network configuration

Nokia Flexi EDGE BTS uses the following transmission sub-modules:

FIFA

FIEA

FIPA

FIQA

FIYA


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CHAPTER 5. CO-SITING

Nokia Flexi EDGE BTS can be co-sited with the following BTSs:

Nokia Flexi WCDMA BTS

Nokia Ultra Site WCDMA BTS

Nokia Ultra Site EDGE BTS

In addition, Nokia Flexi EDGE BTS can also be co-located with Nokia and other vendors

GSM or WCDMA BTSs on a shared site. Nokia Flexi EDGE BTS also supports the use of

existing site support systems in co-located cases.


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CHAPTER 6. FEEDERLESS AND DISTRIBUTED SITE

Nokia Flexi EDGE BTS Feederless and Distributed Site Solutions refer to a situation where

the System Module (ESMA) and Dual TRX Modules (EXxA) are installed apart from each

other. The Optical Converter Module (EOCA) is used at both ends of the optical fibre for

interfacing the System Module and Dual TRX Modules.

The benefits of the Feederless and Distributed Site Solutions compared to a traditional BTS

site are:

Overall site RF performance is better compared to antenna feeders installation (the

gain can be 2...5dB).

The solutions open easier, new and optimized installation possibilities especially in

difficult places.

There is no need for mast head amplifiers.

6.1. Feederless site

In the feeder less site solution, the distance between the System Module and the Dual TRX

Module can be up to 150 m. The feeder less site solution is typically used either on a rooftop

BTS site as or as mast head BTS site. In both cases the Dual TRX Module can be installed

very close to the antenna. This can lower the site investment costs whilst improving the

coverage, as the total length of antenna feeder line required is reduced.

6.2. Distributed site


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In the distributed site solution, the distance between the System Module and Dual TRX

Modules can be up to 10 km. The existing optical fibres can be utilised and equal benefits are

possible as in the feeder less site concept.

CHAPTER 7. TECHNICAL DATA

7.1. Operating range

The operating ranges of Nokia Flexi EDGE BTS are shown in the table below.

Table 1. Operating range

7.2. BTS power consumption

The BTS power consumption depends on the input voltage, the ambient temperature and the

traffic load. The following values are calculated for operational configurations with a 2-way

uplink diversity (all TRXs transmitting at full power in all timeslots):

Table 2. Power consumption of Nokia Flexi EDGE BTS with 2-way uplink diversity


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anuj final report

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