Network slicing is 5G’s way to get you everything. You
see, one network will not provide all services for everyone, so they have
5G which will encompass many networks, wireless networks, into one
big network. You can’t do everything with one wireless network. Like
Steven Wright says, “You can’t have everything. Where would you put it?”
If you had one network, it would not be efficient enough to serve
all the devices on it. You want a network that works. Otherwise, you have
a notwork because it does not work! Most IOT devices don’t need broadband. Most
smartphones need mobile coverage. Most laptops need broadband. Most gamers need
massive broadband to get the VR to work. Each specific group has a different
need. Wouldn’t it be nice if you could have several different wireless networks
and have them all go into one core and share resources? Well, 5G came up with
network slicing so we can do just that!
The research on network slicing showed me one thing
that this is a fancy way to say different networks all connected to a
common core. I think this term is interesting, but if you are in IT, then
you know that you could have multiple networks, virtual or separated,
all sharing the same backbone or even the same physical network. The way I
see it, it is all about the RAN! Let’s explore why.
Well, in 5G, it is not much different. The
big difference is that you could have a wireless network dedicated to a
specific service. What this means is that when planning a network, in this
case, a RAN network, make sure you know what the application will be so that you
can plan accordingly.
Think about the different markets 5G will be serving. It
could be autonomous cars, virtual reality, or tons of simple IOT devices. Each
system will have different need and purpose. The goals are not the same for
each. Therefore, they should not all share the same network. So, for the 5G
network to include them all, they came up with a cool term like network
slicing. The reality is that they will all be different networks that could be
sharing the same core or even backhaul. We are creating a way to share
resources and build in efficiencies.
We’ll get into why in a few minutes, let’s look at how they
will work together first. It’s all about sharing of resources. Think of the
HetNet, (Heterogeneous Network) and how we had small cells working with
Macrocells and Wi-Fi all working together as one network. Now you have multiple
networks all working independently, yet, connecting to the common core.
Which resources are shared in network slicing? The backhaul
and the core but also routers and servers and possibly even cloud resources.
The key to getting latency down is to rely on the cloud. However, the
end user will determine which network will be used and how it will be
utilized. The way I see it, from a wireless viewpoint is that the device
will need to have a wireless network that fits the needs. In other
words, virtual reality with need low latency and very high bandwidth to
work properly. Autonomous cars will have very low latency but lower
bandwidth needs. IOT devices will have medium latency but very low
data rates, and they will not be listening to the network all the time
like the other 2, they will only listen to the network on a need to know
basis.
The examples above show us that there will be a need
for specific wireless networks to serve each purpose. The common
denominator will the core. The core will need to know how to process each
part of the network. Making the major carriers happy that they have
resource sharing capabilities to save costs. They want to reuse as many
resources as possible. Device manufacturers will continue to
improve devices and battery life.
