The network slicing in 5G is a method of End-to-End (E2E) virtual network, encompassing networking, computation and storage functionalities. The NFV is to separate the network functions from the network hardware and thereby enabling network abstraction. My question is what is the difference between these two significant networking techniques?
Slices are still in that "yet another confusing marketing term" phase. Designed to make 4G look old and 5G to look cool, hip, and awesome. Essentially what we are talking about with 5G is carrier virtualization. Most carriers can't even tell you what it is, let alone how they will productize it.
So the cellular network hardware normally services a single carrier network with equal access for any client device. Network slicing is, in a sense, a means to overlay multiple carrier network from one infrastructure. It is the conceptual anologue of multiple SSIDs from an enterprise WIFI system. Each with different class of service.
Remember that whole "net neutrality" thing with "fast lanes" and slow lanes? That is what we are talking about. Making slow lanes and fast lanes. Or in this case VERY, VERY slow lanes for brain dead IoT devices.
So suppose your municipality wants to install "smart" street lamps because dumb street lamps are not cool and hip enough. Each street lamp has a 5G radio. Perhaps it only uses this radio for 10 seconds a day. However you don't want to pay $50 a month for a light bulb's mobile data plan.
So you as Verizon to carve off a slice which has just enough bandwidth, and barely tolerable ( for a lightbulb to do lightbulb stuff ) latency to let the light bulbs get their daily instructions or post bulb selfies or whatever. This slices access to the network is very limited.
Now instead of $50 a month, Verizon can charge you $1 a month for 5G service to your street lights. When the light goes on or off or explodes it can tweet out that status back to the great light bulb herder in the sky. "Hooray!" Plus from end to end it is treated as an isolated private network - with the same degree of isolation afforded between carriers today - so "russian hackers" or whatever our latest boogeyman is can get to them.
A more practical application is security cameras, surveillance, people counting, traffic accident, gunshot monitoring. Where a device will operate in the dark until something happens. So take a security camera with a 30 day record capacity. It sits there recording, and when and if the operator needs to review the camera, it can do so via a 5G backhaul. Again, nobody wants to pay $50 / month for that camera. So your slice may allow for an aggregate of 50Mbps between all of the cameras, say 100 cameras. This with the idea that the total bandwidth is fairly low. Essentially a distributed recorder.
There are many wired and wireless networks which have been built to accommodate these use cases, they are expensive to maintain, and easy to hack. So basically Verison need only sell you access for slightly less than maintaining that wifi / wired network - which is huge.
It may also impact campus environments - why deploy WiFi when you can BuyFi?
So once you peel away all the buzz words and marketing jazz, its really not all that advance an idea.
Dear Najib A. Odhah,
the answer to your question can be found at the address:
https://www.netmanias.com/en/post/blog/8325/5g-iot-network-slicing-sdn-nfv/e2e-network-slicing-key-5g-technology-what-is-it-why-do-we-need-it-how-do-we-implement-it
The two terms NFV and "Network Slicing" are very related.
Network slicing means the provision of network services by networking various service components. Network slicing is "attractive" when the service components are mainly provided by virtual machines - that is, VNFs. With network slicing, some physical components can also be integrated into VNFs.
Network slicing is similar to building VLANs, and a VLAN can contain a mix of "virtual machines" and "physical computers."
Best regards
Anatol Badach
Dears Mr.Mahar and Mr. Badach
Thanks a lot for your answers. The link sent by Mr. Badach is so useful, also i find the following link is also valuable. I think that the network slicing is a general term of the network virtualization.
https://www.computerworld.com/article/3231244/mobile-wireless/what-is-the-difference-between-network-slicing-and-quality-of-service.html
Kind regards
Najib
Network Function Virtualization NVF as an analogue of parallel networks in the era of circuit switching
Network slicing is E2E concept and comprises each of RAN, Transport Network (TN) and Core subnet, and realized in the network by leveraging NFV and SDN technologies.
Network slicing is set out to address crucial needs of 5G, including support for multi-service provisioning. Focusing on resource and performance isolation, as well as security concerns associated with multi-tenancy, existing management and orchestration (MANO) frameworks typically offer network slices in the form of isolated bundles of computing, storage, and network resources across the network infrastructure, including the edge. Najib A. Odhah
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