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Saturday, October 31, 2009
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
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From: Mohamed Serry
Mobile Terms & Acronyms (F,G,H,I andJ)
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
Wednesday, October 28, 2009
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
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
Routable GPS Map for Karachi & Pakistan
For those having a GPS in their mobile devices and want free routable maps of Pakistan. Garmin GPS software/ devices are required.
http://teeth.com.pk/blog/2009/10/18/routable-gps-map-for-karachi-pakistan
http://pkmaps.freeforums.org/routable-karachi-street-map-for-garmin-gps-t4.html
http://pkmaps.freeforums.org/pkmaps-free-gps-map-of-pakistan-ver1-0-30-july-2009-t242.html
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From: Muhammad Tayyeb
Wednesday, October 21, 2009
Are you going for interview this weekend - refresh yourself
Hello,
Are you going for interview this weekend - read some odd questions, may help you.
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
Color Picker - Innovation has no end
Technology changes never ends.......... |
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.
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.
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.
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.
Mobilink Infinity-WiMAX 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.
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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* These new charges apply on non Wi-Fi CPEs only .
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