5G will lower latency to 1ms a recent research says
As the things in the IoT ecosystem develop further, there is already a high demand for ensuring their connectivity and operation from networking point of view. 4G networks are already choking on all the data our present devices generate, so here is where 5G will kick in as Prof. Roberto Verdone explained earlier today at the IoTSC2014.
The latest and most used network paradigms do not differentiate the Internet of Things like a separate entity, but they rather account them as yet another source of data. Having the next network paradigm we are going to adopt – 5G – designed with Internet of Things in mind is essential.
5G is expected to allow cellular networks to have 1000x throughput larger than the 4G and that, believe me, is large. It will allow us to achieve larger capacity, get closer closer to the bound and will improve network efficiency.
Capacity of a cellular network is a factor that depends, primarily, on two things – bandwidth and signal-to-noise ratio (SNR). To raise the bandwidth, providers will start to use higher frequency bands – >6Ghz/60-90Ghz. In order to address the SNR issue, the amount of cells spread across networks will raise, however the cells will get smaller and they will cover smaller radius, as well. The expected 5G radius of coverage is ~50m and the height of antennas will be < 10m. This means that in the future, we will no longer see cellular antennas on the roofs – they will be small, portable and will probably hang on lamp posts.
To get closer to the bound and serve ever moving objects, cells will start to “cooperate” – think of hundreds of distributed antennas, serving one single base station. They will cover less radius, but they will be able to seamlessly transmit data from area to area as an object moves across.
5G will put the core network out of the game in terms of how cells connect to the Internet. Currently when you, say, connect to the Internet using your smartphone, it has to go through the cell, which talks to the base station, which talks to a gateway, which transmit your data to the Internet. This is working, as we can tell – we are using our devices with mobile data every day, however this approach is inefficient and creates a lot of latency.
5G aims to lower the latency down to, yes, 1ms. You heard me – 1ms latency. This will be achieved by eliminating some factors from the chain I virtually drawn in the previous paragraph. Cells will talk directly to the Internet, without the need to go through couple of hops to transmit data back and forth.
You probably wonder what would be that critical application that would explicitly require latency around 1ms. Well, to name a few – everything industrial, everything in the area of interactive gaming and.. robotics. A recent report by Cisco says that Robotics will be one of the key things in the future 5G environment.
Exciting times are ahead us. In 2015 the connected devices that a person uses on a daily basis will be 3.47. By 2020, this number will be almost doubled – 6.58 connected devices per person that are used daily. Now that is huge. 5G is on its way – hopefully research on it completes faster and we see it rolling in our cities soon.