User Speed Rates of GSM Technologies

Tremendous achievements of wireless world is providing more enjoyable lifestyle to us. Especially,  watching HD movies via stream is edge corner now for end users like me.

Mobile trend is growing rapidly. Following figure shows the interesting statical result from JohnHughes blog.

 Think about it, you are living with your search tool just in your pocket. You do not need to use any cable,device connection etc and you can reach internet very easly with sufficient speed generally. 

Because of the importance of smart phones, we are facing with enhancing wireless mobile telecommunication technologies day by day.

We are planning to explain actual speed rates of each technologies by starting with GPRS technologies briefly.
 

 2G technologies could not reach the Mbps speed rates unfortunately except EGPRS-2. EDGE has 237 kpbs DL speed theoretically. it varies between 120Kbps to 384Kbps practically for per user. Other name of EDGE is 2.75G.

With the introducing WCDMA, we have met superior speed rates. above picture demonstrates the performances of 3G and 4G techs.

Thi biggest issue for high speed wireless networks is the lack of bandwidth. We can say it also as range of usable frequencies. So we put following pictures from speedtest.net to compare pratical and theoretical results for user speed rates.

4G VERIZON USA
  

4G AVUSTRALIA

 4G TMO  EURO

Note: I checked the users fro this test and one user speed rate was 980.92 Mb/s within 188 total tests . I subtracted that one and recalculated the speed test and it was ~10Mbps like in Verizon USA.
 
Speed of Wireless techs has a lot of obstacles like total user, location and velocity, many type of interferences, total users  etc. But we can say , humanity has got very good achievements  about it during this decade and we can easily say that 4G is really great even though it can not be able to reach to wireline speeds at least these years.
 

REFERENCES
http://www.gsma.com/ 
http://autoblog.johnhughes.com.au 
http://www.speedguide.net/faq_in_q.php?qid=366 
http://www.radio-electronics.com/ 
http://www.speedtest.net
http://www.wisegeek.com/what-is-evdo.htm 
http://www.zdnet.com 

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What is going to be happen with LTE?

Following figure shows the simplified general view of wireless telephone technologies

Journey of Wireless mobile technologies started with 2G in 1980s ( we are not interested in 1G which was using  analog telecommunications standards like AMPS in North America, TACS, NMT etc in other regions and before 1G breakthroughs.)
We have introduced with GPRS in the beginning of 2000's  and few years later EDGE popped up.
After 2003, we have met with CDMA based 3G networks. And now( not exactly but not so much time occured by the way) our new buddy is LTE.

 Above picture indicates the radio interface multiplexing enhancement. LTE is using OFDMA for dowlink and SC-FDMA for uplink.

 OFDMA simply provides;
 Spectral efficiency 
 Resistance to multipath interface
 

 




















MIMO
The multiple input, multiple output antenna or better known as the Mimo antenna technology uses multiple radios to transfer more data at the same time and it is really very important innovation.  

 All-IP Based Network Architecture 

The above figure shows gateway solution, offers one device including MME and Serving/PDN Gateway in one place. This is great enhancement for operators. So that, they will be able to update their  network without paying huge money. This upgrade provides also higher network performance, efficient IP routing and latency reducing. 
All-IP, Simplier, Flatter Network = Reduced OPEX & CAPEX
This improves the quality of experience, so let's imagine, it will give us better satisfaction for real time  applications of communication like VoiP.

 As a result,

LTE will have a large impact on application performance

and network capacity

LTE can be introduced in a progressive, scalable, and 

cost effective way

REFERENCES
http://en.wikipedia.org/wiki
http://www.3gpp.org/LTE
http://nortel.com
http://www.mobileisgood.com/ofdm.php
http://www.intel.com/support/wireless/sb/cs-025345.htm
http://www.wildcatalliance.org/the-mimo-antenna-and-its-pros.htm
http://www.digikey.com/us/en/techzone/wireless/resources/articles/wireless-mimo-driving-rf-challenges.html
http://www.iphase.com/products/lte_about.cfm
http://gsmcommunications.blogspot.com/2011_04_01_archive.html

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