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GSM Basic Information

What is GSM?

GSM (Global System for Mobile communications) is an open, digital cellular technology used for transmitting mobile voice and data services. GSM differs from first generation wireless systems in that it uses digital technology and time division multiple access transmission methods. GSM is a circuit-switched system that divides each 200kHz channel into eight 25kHz time-slots. GSM operates in the 900MHz and 1.8GHz bands in Europe and the 1.9GHz and 850MHz bands in the US. The 850MHz band is also used for GSM and 3GSM in Australia, Canada and many South American countries. GSM supports data transfer speeds of up to 9.6 kbit/s, allowing the transmission of basic data services such as SMS (Short Message Service). Another major benefit is its international roaming capability, allowing users to access the same services when travelling abroad as at home. This gives consumers seamless and same number connectivity in more than 210 countries. GSM satellite roaming has also extended service access to areas where terrestrial coverage is not available.

From: M.Serry

GSM World Wide Abbreviations ( letter A )

Mobile Terms & Acronyms

"Wireless technology continues to evolve at a rapid pace and along with it so too does the language used by the wireless industry - which at times can leave even the most accomplished wireless practitioner confused or bemused" - Rob Conway, CEO GSM Association The following is a compiled list of mobile terms and acronyms taken from a GSM Association supported publication. For a hardback copy of Mobile Terms & Acronyms please contact GSM Publications.

1G

The first generation of analogue mobile phone technologies including AMPS, TACS and NMT

2G

The second generation of digital mobile phone technologies including GSM, CDMA IS-95 and D-AMPS IS-136

2.5G

The enhancement of GSM which includes technologies such as GPRS

3G

The third generation of mobile phone technologies covered by the ITU IMT-2000 family

3GPP

The 3rd Generation Partnership Project, a grouping of international standards bodies, operators and vendors with the responsibility of standardising the WCDMA based members of the IMT-2000 family

3GPP2

The counterpart of 3GPP with responsibility for standardising the CDMA2000-based members of the IMT-2000 family. 3GPP2 is spearheaded by ANSI

8PSK

Octantal Phase Shift Keying

A5/1/2/3/8X

Encryption algorithms for GSM networks

AAL

ATM Adaptation Layer

ABR

Available Bit Rate

A-bis

Interface between the BSC and BTS in a GSM network

AB

Access Burst; used for random access and characterised by a longer guard period to allow for burst transmission from a MS that does not know the correct timing advance when first contacting a network

ACTE

Approvals Committee for Terminal Equipment

ACTS

Advanced Communications Technologies and Services – a European technology initiative

ACU

Antenna Combining Unit

ADPCM

Adaptive Differential Pulse Code Modulation; a form of voice compression that typically uses 32kbit/s

AFC

Automatic Frequency Control

AGCH

Access Grant Channel; downlink only, BTS allocates a TCH or SDCCH to the MS, allowing it access to the network

Air interface

In a mobile phone network, the radio transmission path between the base station and the mobile terminal

A-interface

Interface between the MSC and BSS in a GSM network

AM

Amplitude Modulation

AMPS

Advanced Mobile Phone System, the analogue mobile phone technology used in North and South America and in around 35 other countries. Operates in the 800MHz band using FDMA technology

AMR

Adaptive Multi-Rate codec. Developed in 1999 for use in GSM networks, the AMR has been adopted by 3GPP for 3G

Analogue

The representation of information by a continuously variable physical quantity such as voltage

ANSI

American National Standards Institute. An non-profit making US organisation which does not carry out standardisation work but reviews the work of standards bodies and assigns them category codes and numbers

ANSI-136

See D-AMPS

API

Application Program Interface

AoC

Advice of Charge

ARIB

Association of Radio Industries and Businesses. An organisation established by Japan’s Ministry of Posts and Communications to act as the standardisation authority for radio communication and broadcasting

ARPU

Average Revenue Per User

ASCII

American Standard Code for Information Interchange

ASIC

Application Specific Integrated Circuit

ASP

Application Service Provider

Asymmetric Transmission

Data transmissions where the traffic from the network to the subscriber is at a higher rate than the traffic from the subscriber to the network

A-TDMA

Advanced Time Division Multiple Access

ATM

Asynchronous Transfer Mode; a multiplexed information transfer and switching method in which the data is organised into fixed length 53-octet cells and transmitted according to each application’s instantaneous need

AUC

Authentication Centre; the element within a GSM network which generates the parameters for subscriber authentication

--------------------

From: Mohamed Serry

Mobile Terms & Acronyms (F,G,H,I andJ)

FACCH
Fast Associated Control Channel; similar to the SDCCH but used in parallel for operation of the TCH. If the data rate of the SACCH is insufficient borrowing mode is used

FB
Frequency Correction Burst; used for frequency synchronisation of the mobile

FCC
Federal Communications Commission; the US regulatory body for telecommunications

FCCH
Frequency Correction Channel; downlink only, correction of MS frequencies, transmission of frequency standard to MS etc.

FDD
Frequency Division Duplex; a radio technique which uses paired spectrum; UMTS has an FDD element

FDMA
Frequency Division Multiple Access-a transmission technique where the assigned frequency band for a network is divided into sub-bands which are allocated to a subscriber for the duration of their calls

FEC
Forward Error Correction

FH
Frequency Hopping

FH-CDMA
Frequency Hopping CDMA

FMC
Fixed Mobile Convergence

FMI
Fixed Mobile Integration

FPLMTS
Future Public Land Mobile Telecommunications System, the original title of the ITU’s third generation concept now known as IMT-2000

FRA
Fixed Radio Access; see WLL

FSDPSK
Filtered Symmetric Differential Phase Shift Keying

FSK
Frequency Shift Keying; a method of using frequency modulation to send digital information

FSOQ
Frequency Shift Offset Quadrature Modulation

FSS
Fixed Satellite ServiceGb
The interface between the PCU and the SGSN in a GSM/GPRS network

Gc
The interface between the GGSN and the HLR in a GSM/GPRS network

Gd
The interface between the SGSN and the SMSC in a GSM/GPRS network

Gf
The interface between the SGSN and the EIR in a GSM/GPRS network

Gi
The interface between the GGSN and the Internet in a GPRS network

Gn
The interface between the GGSN and the SGSN in a GPRS network

Gp
The interfaces between the GGSN/SGSN and the Border Gateway in a GPRS network

Gr
The interface between the SGSN and the HLR in a GPRS network

Gs
The interface between the SGSN and the MSC in a GSM/GPRS network

GAIT
GSM/ANSI 136 Interoperability Committee

GAP
Generic Access Profile; a DECT term

Gbit/s
A unit of data transmission rate equal to one billion bits per second

GMSC
Gateway Mobile Services Switching Centre; the gateway between two networks

GCF
Global Certification Forum

Geostationary
Refers to a satellite in equatorial orbit above the earth which appears from the surface to be stationary

GERAN
GSM-EDGE Radio Access Network; the name for the evolution of GSM towards 3G based on EDGE

GGRF
GSM Global Roaming Forum

GGSN
Gateway GPRS Support Node; the gateway between a cellular network and a IP network.

GHz
A unit of frequency equal to one billion Hertz per second

GMPCS
Global Mobile Personal Communications by Satellite

GMSK
Gaussian filtered Minimum Shift Keying; a refinement of FSK which minimises adjacent channel interference

GPRS
General Packet Radio Service; standardised as part of GSM Phase 2+, GPRS represents the first implementation of packet switching within GSM, which is a circuit switched technology. GPRS offers theoretical data speeds of up to 115kbit/s using multislot techniques. GPRS is an essential precursor for 3G as it introduces the packet switched core required for UMTS

GPS
Global Positioning System; a location system based on a constellation of US Department of Defence satellites. Depending on the number of satellites visible to the user can provide accuracies down to tens of metres. Now being incorporated as a key feature in an increasing number of handsets

GRX
GPRS Roaming Exchange

GSM
Global System for Mobile communications, the second generation digital technology originally developed for Europe but which now has in excess of 71 per cent of the world market. Initially developed for operation in the 900MHz band and subsequently modified for the 850, 1800 and 1900MHz bands. GSM originally stood for Groupe Speciale Mobile, the CEPT committee which began the GSM standardisation process

GSM MoU
The GSM Memorandum of Understanding, an agreement signed between all the major European operators to work together to promote GSM. The precursor of the GSM Association

GSM-R
GSM-Railway, A variant of GSM designed to meet the special communications needs of international train operators

Handoff
The transfer of control of a cellular phone call in progress from one cell to another, without any discontinuity

Hands-free
The operation of a cellular phone without using the handset; usually installed in vehicles.

HCS
Hierarchical Cell Structure; the architecture of a multi-layered cellular network where subscribers are handed over from the macro to the micro to the pico layer depending on the current network capacity and the needs of the subscriber

HDLC
High level Data Link Control

HIPERLAN
High Performance Radio Local Access Network; a wireless local area network being standardised by ETSI (Also HIPERLAN2)

HLR
Home Location Register; the database within a GSM network which stores all the subscriber data. An important element in the roaming process

HSCSD
High Speed Circuit Switched Data; a special mode in GSM networks which provides higher data throughput By cocatenating a number of timeslots, each delivering 14.4kbit/s, much higher data speeds can be achieved

HSPSD
High Speed Packet Switched DataIub
The interface between the Node B and the RNC in a UMTS network

Iur
The interface between RNCs in a UMTS network

Iups
The connection between the RNC and the packet switched network in a GSM/GPRS/UMTS network

Iucs
The connection between the RNC and the circuit switched network in a GSM/GPRS/
UMTS network

I-ETS
Interim European Telecommunications Standard

I-mode
A service developed by Japanese operator NTT DoCoMo, I-mode delivers a huge range of services to subscribers and has proved enormously popular with some 30 million regular users. The revenue sharing model used for I-mode is being adopted by other operators as the basis for the new services enabled by GPRS and 3G

IMEI
International Mobile Equipment Identity

IMSI
International Mobile Subscriber Identity; an internal subscriber identity used only by the network

IMT-2000
The family of third generation technologies approved by the ITU. There are five members of the family: IMT-DS, a direct sequence WCDMA FDD solution IMT-TC, a WCDMA TDD solution IMT-MC, a multicarrier solution developed from cdma2000 IMT-SC, a single carrier solution developed from IS-136/UWC-136 IMT-FT, a TDMA/TDD solution derived from DECT

IN
Intelligent Network

INAP
Intelligent Network Application Part

Internet
A loose confederation of autonomous databases and networks. Originally developed for academic use the Internet is now a global structure of millions of sites accessible by anyone

Intranet
A private network which utilises the same techniques as the Internet but is accessible only by authorised users

IP
Internet Protocol

IPR
Intellectual Property Rights

IPv6
The next generation of IP addressing designed to replace the current system IPv4 which uses a 32 bit address code which limits the number of possible addresses. IPv6 uses a 128 bit code ensuring that the possible number of IP addresses will be virtually limitless

IrDA
Infra red Data Association

Iridium
A low earth orbit satellite communications system developed initially by Motorola.

IS-54
The first evolution in the USA from analogue to digital technology. Used a hybrid of analogue and digital technology, superseded by IS-136

IS-95
Cellular standard know also as cdmaOne

IS-136
Cellular standard also known as TDMA or D-AMPS

ISDN
Integrated Services Digital Network

ISO
International Standards Organisation

ISP
Internet Service Provider

ITU
International Telecommunications Union

ITU-R
ITU Telecommunications Radio Sector

ITU-T
ITU Telecommunications Standardisation Sector

IWF
Interworking Function

Java
A programming language developed by Sun Microsystems Java is characterised by the fact that programs written in Java do not rely on an operating system

JPEG
Joint Photographic Experts Group
 
From: Mohamed Serry

Sunday, October 25, 2009

Solve it............

What is the value of the second row?

[

[

[

ö

= 11

ö

Y

ö

Ù

= ?

Ù

Y

Ù

Ù

= 11

ö

ö

ö

[

= 9

= 8

= 21

= 8

= 7

 

This is a mathematical challenge, and it's been said that:  
* If you're an engineer, you should be able to solve it in (under) three minutes,  
* if you're an architect, in three hours;  
* if you're a doctor, in six hours;  
* if you're an accountant, in three months and  
* If you're a lawyer, in three years.  
The answer is given below:

 

 

 

 

 

 

 

 

 

 

 

 

Answer : 13

From: Ali Mohsin

Saturday, October 24, 2009

Best of …

BEST HAIR-PRODUCT AD 2006 :
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BEST REFRIGERATOR MAGNET 2006  :
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BEST Parking area 2006

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Thursday, October 22, 2009

Tall, fast and highly rated

The allegedly 7'2" fast bowler from Multan, Mohammad Irfan, is just beginning to realise his dreams

Read more

Tuesday, October 20, 2009

Tracking on Trail 5 in Margala Hills

Type:
Network:
Global
Date:
Saturday, October 24, 2009
Time:
7:30am - 12:30pm
Location:
Parking of Trail 3, opposite to F6
Street:
Margala Road
City/Town:
Islamabad, Pakistan
 

Description 

Tracking will start from parking of Trail 3, we will use Trail 5 for climbing, brunch at Capital Hotel Pir Suhawa and will return through Trail 3. Wear Caps and bring ur own at least 1.5 liter bottle of water and some kind of backpack bag to carry it. Wear proper boots/joggers as the way is quite rocky.

Color Picker - Innovation has no end

Technology changes never ends..........

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Designer Jinsun Park from Korea has come out with a simple tool called Color Picker. Place the pen against an object and press the scan button, the color will be detected by the color sensor and the RGB cartridges in the pen will mixed the required inks to create the target color.

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colorpen3

From: Qasim Kiani

Sunday, October 18, 2009

PowerPoint 2007 Demo - Create a PowerPoint template

This demo gives you a brief introduction to the process of creating your own custom PowerPoint 2007 templates that you can store, reuse, and share with others.
To view other content related to the demo, see the associated article.




http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=793e568e-10fb-4a55-ad9b-abb3a5f0fdb3

Wednesday, October 14, 2009

Financial Planning

Dan was a single guy living at home with his father and working in the family business.
When he found out he was going to inherit a fortune when his sickly father died, he decided he needed to find a wife with whom to share his fortune.
One evening, at an investment meeting, he spotted the most beautiful woman he had ever seen. Her natural beauty took his breath away.
"I may look like just an ordinary guy," he said to her, "but in just a few years, my father will die and I will inherit $200 million."
Impressed, the woman asked for his business card and three days
later, she became his stepmother.  

Women are so much better at financial planning than men.

From: Nusrat Rehan Mazhary

Are u a genius..??

This is a challenge let’s see how smart you are – The answer is mentioned at the end.

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The answer is 91.

Tuesday, October 13, 2009

Excel 2007 Demo - Explore Adventure Works in Excel by using an OLAP PivotTable report

This demo uses the fictitious company Adventure Works to show how you can use an OLAP PivotTable report to query large amounts of data in a cross-tabular way with good performance. OLAP, or Online Analytical Processing, is a technology used to organize large business databases into cubes to support business intelligence. The demo assumes you have a basic understanding of PivotTable reports in Excel 2007.
To view other content related to the demo, see the associated article.

http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=72082465-2dca-4d34-a3c4-2d203a0a14df

Mobilink Infinity-WiMAX 2 plus 1 Offer

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2 plus 1 offer

Mobilink Infinity has captured a sizable chunk of the Internet Solutions market in Karachi by extending the most reliable QoS in a short span of time. With matchless connectivity and excellent after sales assistance, Infinity gives all its customers the right edge to connect to the world around them in a super fast way. Infinity continues to be the connection of choice for thousands of satisfied Internet users and proves to be the fastest growing WiMAX service provider in Pakistan.
Now, keeping up with the tradition of always aiming for the best, Infinity Team has devised another amazing promotion for all broadband users that will add to our brand profile in the market and bring the brand at par with the growing competition.

2 plus 1 Offer:

2 plus 1 is the latest exciting offer on Infinity WiMAX services for all broadband users. By utilizing this offer, customers will be able to enjoy absolutely free extra online time added to their paid service package. The unbeatable combination of uninterrupted Data and Voice services will be for the customers to enjoy when they pay for two months in advance, and then they will be able to enjoy a whole quarter of the year without having to worry about payments.

Offer Features:

  • Service will be absolutely free in the third month for customers upon payment of two months in advance.

  • Customers will be able to enjoy an approximately 33% discount on the service.

  • No hassle of monthly bill payments for a whole quarter because of bulk advance payment.
Tariff Plan:

Mobilink Infinity is offering unbeatable Voice and Data packages for all broadband users and keeps presenting promotional offers to benefit the customers to the fullest. 2 plus 1 offer is just another example. Please see the attached tariff plan for details of the promotion.

The Great Donkey Theorem

> Equations!

> >
> > Equation
> > 1 
> >
> >
> > Human = eat + sleep + work + enjoy 
> >
> > Donkey = eat + sleep 
> >
> > Therefore: 
> > Human = Donkey + Work + enjoy 
> >
> > Therefore: 
> > Human-enjoy = Donkey + Work 
> >
> > In other words, 
> > A Human that doesn't know how to enjoy = Donkey that
> > works. 
> >
> >
> > ++++++++++++ +++++++++ +++++++++ +++++++++ +++++++++ ++
> > ++ 
> >
> > Equation 2 
> >
> >
> > Man = eat + sleep + earn money 
> > Donkey = eat + sleep 
> >
> > Therefore: 
> > Man = Donkey + earn money 
> >
> > Therefore: 
> > Man-earn money = Donkey 
> >
> > In other words 
> > Man who doesn't earn money = Donkey 
> >
> >
> > ++++++++++++ +++++++++ +++++++++ +++++++++ +++++++++
> > + 
> >
> > Equation 3 
> >
> >
> > Woman= eat + sleep + spend 
> > Donkey = eat + sleep 
> >
> > Therefore: 
> > Woman = Donkey + spend 
> > Woman - spend = Donkey 
> >
> > In other words, 
> > Woman who doesn't spend = Donkey 
> >
> > ++++++++++++ +++++++++ +++++++++ +++++++++ +++++++++
> > + 
> >
> >
> > To Conclude: 
> > From Equation 2 and Equation 3 
> >
> >
> > Man who doesn't earn money = Woman who doesn't
> > spend 
> >
> > So Man earns money not to let woman become a donkey! 
> > And a woman spends not to let the man become a donkey! 
> >
> > So, We have: 
> > Man + Woman = Donkey + earn money + Donkey + Spend money 
> >
> >
> > Therefore from postulates 1 and 2, we can
> > conclude 
> >
> >
> > Man + Woman = 2 Donkeys that live happily
> > together!

From: Ali Mohsin

ASP.Net, C-sharp, Winforms, AJAX, XML & SQL Interview Question and Answers (FAQs)

ASP.Net, C#, WInform, AJAX, XML & SQL Interview Question and Answers
======================================================
Best Website - Just check out the link below
======================================================
http://www.faqpanel.com/

 

From: Rehan Katiyar

Friday, October 9, 2009

Mobilink Infinity-WiMAX Activation Charges Revised

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At Mobilink Infinity, we are geared towards providing our swiftly growing customer base with the best and most convenient Internet and Voice services through unbeatable packages. Infinity Team has recently taken a step ahead to ensure that our customers are able to get Infinity services at the most attractive and affordable prices. This will not only maximize brand recall amongst our customers but will also help boost sales and keep the pace up with the competition.  

Keeping in line with this idea, activation charges on Infinity WiMAX packages have been revised with special discounts in place to give the customers full benefit of using our best in class services. The reduced upfront charges for the CPE are going to attract more subscribers and will add to our reputation as the fastest growing WiMAX provider in the country.


Revised Activation Charges:

Package

256 Kbps - 15 GB

512 Kbps - 5 GB

512 Kbps -15 GB

1 Mbps - 5 GB

1 Mbps - 15 GB

Old Charges (Rs.)

3,500

3,500

3,500

3,500

3,500

New Charges (Rs.)

2,500

2,500

2,000

2,000

1,500

* These new charges apply on non Wi-Fi CPEs only .
** WiMAX services are currently available in Karachi only.

The new activation charges are discounted up to more than 50% which will attract potential broadband users. This special packaging is also going to help us in catering to the latest offerings by competition in the market.

Employee Referral System:

In the spirit of ensuring that a maximum number of customers are presented with this dynamic offer, all Mobilink team members are highly encouraged to refer Infinity to their friends and family members in Karachi, who are looking for the fastest Internet Data and Voice connection.  You can always send emails at sales@mobilinkinfinity.com for your referrals to ensure that your referred individuals get the benefit of our service and the special offer.

For details and more, please do not hesitate to contact us.

We are always looking forward to letting you know what Infinity Team is up to!

For further information, please contact:
Brand & Communication : Nuzhat Saadia Siddiqui     0307 4442115
  Pricing & Planning : Sobia Sattar     0300 8438787
Product : Haris Shamsi     0302 8500279

For complete details, please log on to: www.mobilinkinfinity.com

Masajid around the World

Blue Masjid in Yerevan – Armenia
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Faisal M
asjid in ISLAMABAD - Pakistan (night)
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Fatma M
asjid in Kuwait
clip_image003 Great Masjid in Xian - China
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Jamie Asr M
asjid in Brunei (night)
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Koutoubia M
asjid in Marakesh - Morocco
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Kul Sharif M
asjid in Kazan - Russia
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Larabanga M
asjid in Ghana
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Masjid Al Nabawi in Madinah - Saudi Arabia

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M
asjid in Akhaltsikhe - Georgia
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M
asjid in Bangladesh
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M
asjid in Bobo Dioulasso - Burkina Faso
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M
asjid in Gauteng - South Africa
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M
asjid in Kazkhstan
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M
asjid in Kyrgyzstan
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M
asjid in Matara - Sri Lanka
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M
asjid in Pattani - Thailand
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The Underground M
asjid in Malaysia
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Wazir Khan's M
asjid in Lahore - Pakistan
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Cyristal M
asjidin Kuala Terengganu - Malaysia (night)
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From: Javed Iqbal