Explain like I'm five · Network

What is 5G Network Slicing?

5G network slicing, told as a story about splitting one road into dedicated lanes, each guaranteed its own speed.

surgery robot signalthe surgery-robot parcel waits in line behind ordinary onessharing one road means even the urgent parcel waits its turn

Even the urgent parcel waits behind ordinary ones.Sharing one road means even the urgent parcel waits its turn.

a whole separate road just for surgery would cost too muchbut one single line makes the urgent parcels latekeep road costs low and still get urgent parcels there on time

You can't lay a whole new road for every purpose.Keep road costs low and still get urgent parcels there on time.

ultra-low-latency lane — surgery robothigh-bandwidth lane — videostandard lane — ordinary mail5G network slicing = split one road into lanes, each guaranteed its own speedone physical road, several logical lanes

One road, split into lanes, each guaranteed its own speed.One physical road, several logical lanes.

Lane separationa separate lane for each purpose
Guaranteed performancespeed and latency per lane are promised
Isolated operationkeeps one lane's trouble from spreading
Purpose-builtultra-low-latency, high-bandwidth, standard lanes — each guarantees something different
What each slice guaranteesultra-low-latency — surgery robot, latency firsthigh-bandwidth — video, throughput firststandard — ordinary mail, basic guarantee onlykeeps trouble in one lane from spreading to another

Each slice guarantees something different.Ultra-low-latency for surgery robots, high-bandwidth for video, standard for ordinary mail.

each lane runs safely within its guaranteed sharepast the road's total capacity, lane guarantees weakenonly the lanes are split — the trucks and the road stay the same

Slicing doesn't grow the road's total capacity.Only the lanes are split — the trucks and the road stay the same.

In one breath

5G network slicing splits one physical delivery network into several dedicated lanes (virtual networks), each given its own guaranteed performance.

Network slicing creates several logical virtual networks (slices) on top of one physical 5G infrastructure, each independently guaranteeing its own quality — latency, bandwidth, reliability (SLA). It lets very different use cases — ultra-reliable low latency (URLLC), high bandwidth (eMBB), massive connections (mMTC) — share the same network at once.

When grown-ups say it

Network slicing
Splitting one road into dedicated lanes. One physical network, several lanes.
URLLC
The ultra-low-latency lane — for surgery robots. Guarantees latency above all else.
eMBB
The high-bandwidth lane — for video. Guarantees throughput above all else.
mMTC
The lane where huge numbers of tiny parcels move at once. Used when many devices each send just a little, like sensors.
5G Private Network
A delivery network dedicated to one factory. A private network can be sliced further inside itself. → a delivery network just for one factory
SDN/NFV
The technology letting a tower reroute roads in software. Slicing carves its lanes on top of this technology. → a control tower rerouting roads in software
SLA
The promise each lane is bound to. Spells out the guaranteed level of performance.
Congestion control
The device that adjusts truck count when the road is jammed. Lane guarantees shake too once the whole road jams. → the three safety devices
Next story
Sharing One Lane Without Colliding →
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