Today we will tell you what is 5G. But lets start with an illustration .Imagine a day playing a first person shooter game with your online friends on VR without having a single lag in your game play, sitting in a self driving vehicle travelling at a speed of 200 km/hr or operations at hospital done by robots operated by doctors from their home through internet with zero latency.
All this is possible by the upcoming 5G internet services . In this article we would discuss some of important aspects of 5G . So what is 5G? let’s start with a brief history of it’s predessors.
A brief history
Long back ago we uses big phones or landlines to make calls .These devices were fitted with 1st generation (1G) chips which enabled voice communication on phones .
After that 2nd generation (2G) came in by the grace of which we were able to send text message or SMS to other .
As the internet grew and technology advances the phones transformed from big fat phones to small touchscreen smartphones and these smart phones were able to access a fast connectivity internet which became possible by the 3rd generation chips (3G) fitted inside the device and the connectivity hosted by the cellular companies.
After 3G there came 4th generation (4G) internet connectivity which is much faster than 3G . By the 4G connectivity we were able to watch high quality video content on our phones, stream high quality video content on our phones and much more .
What 5G actually is and what is claims out?
After 4G, 5G is the latest upcoming internet services . 5G is the software defined network which means it won’t replace cables entirely but could replace the need for them by largely operating on cloud itself. This means it would have 100 times better capacity then 4G and claims to dramatically improve the internet speed.
For example to download a 720p 2 hours movie by 3G it takes about 5 hours with 4G an hour and with 5G 8sec to completely download the movie.
The speed of 5G is upto 10 gb per second
The other issue that 5G claim to solve is Latency. Latency is amount of time delay in response to any command or delay in receiving and sending information. For example take a pen and paper and write any alphabet or number which strikes your head first . The amount of time it takes you to think and write on paper is 0 millisecond .
4G has a latency of about 50 millisecond and 5G claims to solve it by reducing the latency to zero millisecond.
This means by the use of 5G, devices can communicate with each other in nearly real time what it means by real time is that by 5G we can interact with people, objects, characters controlled by someone else with almost zero lag and can majorly improve the responsiveness in devices which uses sensors to make important decision.
This can be a big boost to :
- Iot devices (Internet of things)
- Responsiveness of self driving vehicles that require to apply a sudden brakes when required.
- Remotely controlled robots in hospital that require real time zero latency for precision robotics surgery .
- Virtual yoga therapy session.
- Telemedicines .
How 5G will actually work ?
5G system will run of smaller divided territory called cell sites. The exchanges between cell sites and devices are made with encoded data, through radio waves called Orthogonal frequency-division multiplexing or OFDM .A method of digital signal modulation in which a single data stream is split across several separate narrowband channels at different frequencies to reduce interference and crosstalk. This encoding is not much different from what 4G LTE use and the frequency on which 5G can travel are :
- Low band frequency
- High band frequency
On low band frequency the 5G operate from 4G cell sites that company already have in place but the encoding will be more flexible and uses bigger channel size to get 50% more internet speed than LTE.
But to get multigegahertz, high speed data we use a new type of wave called millimeter wave.
What is millimeter wave?
5G to transfer such a huge speed uses a entirely different wave which has a high frequency than 4G known as millimeter wave . These millimeter wave have a frequency range of 22 to 30 GHz and enough spectrum range to carry big channels at very high speeds.
Problems in millimeter wave and Barriers in setting a 5G connectivity.
The problems these Millimeter wave suffer is, due to it’s high frequency the waves cannot travel a larger distance and can be blocked by any Barriers in it’s way.
4G network can cover a range of 10 km from the antenna without losing any signal whereas 5G can just cover 300 meters of range around the antenna.
That’s why to make 5G connectivity possible we have to build small cell sites. Hundreds of cell sites have to be made around the city to make 5G connectivity possible.
When is 5G coming in India?
5G connectivity is not going to come sooner . In India 5G services would be going to be available around 2022 to 2023.
Companies big step towards 5G
A lot of big companies like Qualcomm, Samsung, Verizon, LG, Sprint and much more have started their work on 5G to make it viable for commercial use. Qualcomm which is a wireless chip maker and have been forefront in making advanced chips since 3G era .
They have made a new chip called Snapdragon X55 5G is a millimeter wave modem that would run along their new millimeter wave antenna the QTM 525 and help smartphones to stay connected with 5G as well as with the older G’s.
Is 5G safe?
To be true,we dont have a answer but we do have an idea. 5G will be successor of 4G we all know, but it will also have adverse health effects. Studies have shown this. 5G will work between a spectrum of radiation 7 to 110 GHz which is actually very high power frequency. Another study have shown that our sweat glands can absorb energy between 7.5 to 110 GHz . Thus our skin can absorb 5G energy. Another incident took place in Netherlands,where hundreds of birds died in a minute when 5G testing was going near a park .
Thus we can say that 5G will bring effects but don’t know how adverse.