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Network Slicing is 5G’s Hottest Feature

Forget higher data rates or lower latencies, network slicing is where 5G really shines

2 min read
Illustration by Greg Mably
Illustration: Greg Mably

The hottest feature of 5G isn't discussed very much. When people talk about 5G they tend to discuss the gigabit speeds or the lower latencies. But it's network slicing, the ability to partition off segments of the 5G network with specific latency, bandwidth, and quality-of-service guarantees, that could change the underlying economics of cellular service. Network slicing could lead to new companies that provide connectivity and help offset the capital costs associated with deploying 5G networks.

How? Instead of selling data on a per-gigabyte basis, these companies could sell wireless connectivity with specific parameters. A manufacturing facility, for example, may prioritize low latency so that its robots operate as precisely as possible. A hospital may want not only low latency but also dedicated bandwidth for telemedicine, to ensure that signals aren't lost at an inopportune moment.

Today, if a hospital or factory wants a dedicated wireless network with specific requirements, a telco has to custom-engineer it. But with network slicing, the telco can instead use software to allocate slices without human involvement. This would reduce the operating costs of a 5G network. That ease and flexibility, combined with the ability to price the network for different capabilities, will be what helps carriers justify the capital costs of deploying 5G, says Paul Challoner, the vice president of network product solutions for Ericsson North America.

Challoner envisions that soon customers will be able to go to a telco's website and define what they want, get the pricing for it, and then use the network slice for however long they need. He sees 2020 as being the year that equipment companies like Ericsson “race to the slice," trying to show wireless carriers what they can do.

Mobile-tech consultant Chetan Sharma thinks network slicing will likely take a year or two longer to hit the mainstream. But he also sees it as a catalyst for new companies that will enter the market to resell connectivity for dedicated use cases. For example, a company like Twilio or Particle, which already resell network connectivity to clients, could bring together slices from different carriers to offer a global service with specific characteristics. A company like BMW could then use that service when it wants to roll out a software update at a specific time to all of its vehicles—and to ensure that the update made it through.

Or maybe Amazon or Microsoft Azure could offer an industrial IoT product to factories that have specific latency requirements, by bundling together wireless connectivity from multiple carriers. A few years back, the telecom industry was debating whether carriers were becoming a dumb pipe. Sharma thinks the ability to customize speed, latency, and quality of service means 5G will put an end to that particular debate.

That said, carriers charging customers based on the capabilities they need does mean that some people will bring up concerns around network neutrality and how to ensure that customers aren't charged an arm and a leg for a decent best-effort service.

“It's uncharted territory," says Sharma. “When the FCC was looking at [network neutrality] they didn't consider network slicing as part of the equation. So my view is that they will have to update what operators are allowed to do with network slicing. We'll need more clarity on the ruling."

This article appears in the March 2020 print issue as “What 5G Hype Gets Wrong."

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Why the Internet Needs the InterPlanetary File System

Peer-to-peer file sharing would make the Internet far more efficient

12 min read
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Carl De Torres
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When the COVID-19 pandemic erupted in early 2020, the world made an unprecedented shift to remote work. As a precaution, some Internet providers scaled back service levels temporarily, although that probably wasn’t necessary for countries in Asia, Europe, and North America, which were generally able to cope with the surge in demand caused by people teleworking (and binge-watching Netflix). That’s because most of their networks were overprovisioned, with more capacity than they usually need. But in countries without the same level of investment in network infrastructure, the picture was less rosy: Internet service providers (ISPs) in South Africa and Venezuela, for instance, reported significant strain.

But is overprovisioning the only way to ensure resilience? We don’t think so. To understand the alternative approach we’re championing, though, you first need to recall how the Internet works.

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