HSPA LTE CDMA WiMAX…huh?
There is so much confusion on cellular network, generations of phones, type of transmissions and complicated lingos to describe all the tech behind a cellphone. This article was begging to be written.
It really breaks down into 4 major generations of technologies. As a reference, the 1G/2G/3G/4G simply means Generations in technology advancements. Mostly to let the consumer know that "Hey! we’re on the next hottest generation technology!" Almost meaningless for the most part but easier to say 4G than to say 3.9G HSPA+.
The cellular generations breakdown as follows:
1G | 2G | 3G | 4G | |
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What is it: | 1st Generation Tech: Analog, think AM Radio |
2nd Generation Tech: Digital, think FM Radio |
3rd Generation Tech: Digital, think FM Radio |
4th Generation Tech: Digital, think FM Radio |
Who uses it: | This tech is still widely used. India, China and Africa. Roughly 70% of the world who are using cellphones! | Most of 1G countries are moving onto 2G. United States still uses 2G as a "fall back" whenever we can’t connect 3G or 4G networks. So indispensible! Won’t be going away anytime soon. | Majority of modern world is on 3G or some variation of. One can get more than adequate experiences using 3G data driven mobile app. Matter of fact, if the mobile application was designed right. It works just as well on 2G! | Latest and greatest of cellular technology but it’s not yet widely adopted. Can be found in large metro areas but spotty. Easily falls back to 3G datarates. |
Technologies: | Voice Pagers |
Digital Pagers SMS Text EDGE EV-DO CDMA |
HSPA LTE |
HSPA+ LTE Advance WiMax |
How Fast is it: | <10Kbit/s |
Typical: 56Kbit/s
Wishful max: 236Kbit/s |
Typical: 1Mbit/s
Wishful max: |
Typical: 2Mbit/s
Wishful max: |
Used for: | Talk Pager |
Talk Digital Data SMS Text GPS |
Talk SMS Text Digital Data GPS |
Talk SMS Text Digital Data GPS |
Really, what is it really good for?: |
– talk In 3rd world countries and in rural areas, this along with SMS is a "computer." |
– talk – SMS – small data
This is the computer for 70% not using smartphones. The 2G phones is everything for them: internet, computer, telephone, life saver. |
– talk – SMS – voip – medium data – GPS This is really 2G but bit faster. Nothing really monumental in capability or function. There are new technologies like HSPA and LTE but they are not at their optimum until the network is 4G capable. |
– talk – SMS – voip – BIG data – GPS 4G is where streaming video’s, audio’s, live TV, big images, video conferencing, cloud computing etc.. all come to life. In a lot of the cases, the speeds can be greater than your home internet connection! Also this is where tethering one’s laptop to your phone becomes useable. With 3G if tethering, it feels like you time traveled to the old modem 56.6Kbit/s days but when tethered to 4G? You’re in the jetson era! |
Usages: | blah blah blah blah. Voice quality actually pretty good since it’s analog but mostly used for blah blah blah… beep beep beep pager! | LOL ROFL IMHO :)
Simple text emails with tiny attachments. |
Talk SMS Text Digital Data GPS |
Talk SMS Text Digital Data GPS |
Screen Sizes: | Typical size: 128 x 160pixels
which means roughly 14 letters across by |
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Typical size: 240x320pixels |
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Typical size: 320x480pixels |
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Typical size: 720x1280pixels The difference comes in eye strain. In previous generation lesser resolution displays. They have to "fuzzy" up the letters to make them look smooth but made you strain to see it. Now with "retina" aka super hi-resolution. You don’t strain as much so easier reading but again hard to notice. |
Carriers: | All carriers support 1G | All carriers support 2G but may not sell 2G phones for much longer. Support however for 2G cannot go away since there are literally millions upon millions still using 2G phones. | Most carriers. Remember that even small carriers can offer you 3G because although they don’t have their own network they lease them out from the top carriers like AT&T, Verizon and Sprint. So wherever the top carrier’s networks are so are the small carriers. Caveat: may only be in heavy metro areas only and not rural or outside of city limits. | Mostly top carriers in order of 4G coverage:
Verizon
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Cellular Data Terminology:
EDGE: | Enhanced Data rates for GSM Evolution |
EV-DO: | Evolution-Data |
CDMA: | Code Division Multiple Access |
LTE: | Long Term Evolution Peak download rates up to 299.6 Mbit/s and upload rates up to 75.4 Mbit/s depending on the user equipment category (with 4×4 antennas using 20 MHz of spectrum). Five different terminal classes have been defined from a voice centric class up to a high end terminal that supports the peak data rates. All terminals will be able to process 20 MHz bandwidth. |
HSPA: | High Speed Packet Access (HSPA)/ High Speed Downlink Packet Access (HSDPA) / High Speed Uplink Packet Access (HSUPA), that extends and improves the performance of existing 3rd generation mobile telecommunication networks utilizing the WCDMA protocols. A further improved 3GPP standard, Evolved HSPA (also known as HSPA+), was released late in 2008 with subsequent worldwide adoption beginning in 2010. The newer standard allows bit-rates to reach as high as 168 Mbit/s in the downlink and 22 Mbit/s in the uplink. |
WiMAX: | WiMAX (Worldwide Interoperability for Microwave Access) is a wireless communications standard designed to provide 30 to 40 megabit-per-second data rates,[1] with the 2011 update providing up to 1 Gbit/s for fixed stations. It is a part of a “fourth generation,” or 4G, of wireless-communication technology |
In Conclusion: If you only check emails, SMS and use specific mobile applications that are not data hungry meaning heavy heavy image uploading and downloading then 3G is more than enough (around 1mbit/s). However if all you do is Facebook, Pinterest, Instagram, Four Square, maps and heavily browse the web then 4G with LTE is no brainer (you need at least 2-4mbit/s else you’ll feel the pain). Now with "cloud" computing where everything lives in the cloud. Your phone will be using your dataplan to the max so 4G is almost a necessity if you’re planning on using the cloud.
NOTE: Even if you are on 3G and want to post pictures and such, you can without the painful waiting to finish uploading. Either take the pictures at low resolution like 320×240 or 640×480 or take it at full resolution then resize it down. Then difference is tremendous:
3G upload times for various Megapixel images: (256K bit/s is realistic)
Megapixels: | Picture size | in bits | upload times |
0.1 | 320 x 240 | 614,000 bits | 2.4 secs |
0.3 | 640 x 480 | 2,457,600 bits | 9.6 secs |
1.3 | 1280 x 1024 | 10,485,760 bits | 41 secs |
2.0 | 1600 x 1200 | 15,360,000 bits | 60 secs |
3.0 | 2048 × 1536 | 25,165,824 bits | 98 secs |
Although these times look great. They are rather optimistic. With cellphones with inherent latency and interference problems you typically get when using radio frequencies, you can expect to double that time for typical usage. Nevertheless, these times can be achieved and even faster depending on your signal strength of course.
-Nurdologist