Overview of GSM Technology- GLOBALSYSTEM FOR MOBILE COMMUNICATION
Post by Jawad Ahmad Riaz
During the period of Evolution of mobile communication technologies various systems were introduced and deployed to achieve standardization in mobile industry but all the efforts were failed. Multiple issues were sustained like incompatibility of systems, development of digital radio frequency. That is when GSM (Global System For Mobile Communication) Technology was introduced and problems like standardization, incompatibility etc were overcame. TDMA solution was chosen in 1987, It is narrowband system and TDMA standards for Time Division Multiple access.
GSM systems were in market for testing purposes in 1980’s but first commercial lunch of GSM technology was made in 1991 in Finland. GSM based mobile phones are operated on TDMA Systems, in TDMA single radio frequency is offered to users with any interference. After all these years, GSM is now the largest mobile communication technology worldwide, all manufacturers of Mobile phones develop their products based on GSM, and all mobile companies provide their subscribers GSM networks. GSM standards for Global System for Mobile Communication, it is widely used mobile technology worldwide and it adopted by more then 214 countries around the world.
Features of GSM Technology
There are many features associated with GSM technology due to which it is bar far the most leading mobile communication technology in the world today. GSM technology facilitates with high speed integrated data, voice data, fax, mail, voice male and mostly used SMS feature. GSM also make sure that all the communication made between networks are secured and protected from intruders and frauds
One of the major advantages of GSM technology which changed the way we looked mobile phones at the beginning. GSM actually brought the concept of being Mobile way beyond the limits. It enabled us to communicate across the continents.
GSM supports multiple frequency levels like 900 MHz, 1800 MHz, 1900 MHz. 1900MHz frequency is used in North America where as 1800MHz is used in other parts of the world. Different frequency bands are used by different mobile phone operators. If you are using Mobile phone which supports 1800MGz and operators are available on this band, phone can be used the network, where as if phone is out of the range of the frequency band on mobile operator frequency than you need to have phone that supports the frequency. To avoid such cases one should always adopt to have mobile phones that support multiple frequency bands.
Different Frequency Bands
There are three different frequency bands on which mobile phones are usually operates and these are Dual Band, Tri-Band and Quad Band.
Dual Band : Dual frequency band operates on 900MHz and 1800 MHz, that means mobile phone that supports dual band can be operated any where in the world where 900 MHz and 1800 MHz frequencies are used. Dual Band GSM networks usually found in all continents Europe, Asia, Africa, Australia and South America.
Tri-Band: As name is obvious three frequencies are supported in Tri Band, these frequencies are 900 MHz, 1800MHz and 1900 MHz. Tri band is also supported all around the world these days.
Quad-Band: Quad Band supports four frequencies which are 850 MHz, 900 MHz, 1800 MHz , 1900 MHz. Quad band also enables GSM phones to road almost anywhere in the world. All countries support GSM networks hence make communication possible.
There are over 700 GMS networks available in the world operating in their respective countries and providing international roaming services courtesy GSM technology. There are over 2 billion GSM subscribers in the world. Countries which are using GSM networks on larger scales are Russia, china Pakistan, United States, India.
GSM phone deliver very good voice quality, support useful services and standards, it is very likely that GSM will remain the only mobile communication network technology to be adopted by each and every country of the world.
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