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Jan 02, 2024 301 likes •544 views

5G Separating Hype from Promise HENNING SCHULZRINNE The views and opinions expressed in this presentation are those of the author and do not necessarily reflect the official policy or position of any agency of the U.S. government. Any

SLIDE 1

5G — Separating Hype from Promise

HENNING SCHULZRINNE

IMS 5G SUMMIT

The views and opinions expressed in this presentation are those of the author and do not necessarily reflect the official policy or position of any agency of the U.S. government. Any resemblanceto actual policies, living or dead, or actual events is purely coincidental.

SLIDE 2

IMS 5G SUMMIT

IoT IoT 5G

SLIDE 3

Design for 20 years

IMS 5G SUMMIT

SLIDE 4

Generations are distinct

IMS 5G SUMMIT

SLIDE 5

IoT requirements

IMS 5G SUMMIT

( (

Wide-area Wireless Communication Challenges for the Internet of Things Harpreet S. Dhillon, Howard Huang, Harish Viswanathan

SLIDE 6

5G low latency

IMS 5G SUMMIT

X X

V2I2V

X

ne-to-

many! EEW (< 5 s)

tight control loop  near-100% availability

X

LAN

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Niche networks persist

IMS 5G SUMMIT

short range low energy; mesh ubiquity; low cost speed; public APs tries to usurp niche

SLIDE 8

What’s the economic case for 5G?

IMS 5G SUMMIT

avg. about 2.1 GB/month

T-Mobile: 10 GB tethering

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Cord-cutting for broadband?

IMS 5G SUMMIT

SLIDE 10

Network economics, (over)simplified

IMS 5G SUMMIT

Equipment 4% Construction 11% Operations 85%

% OF REVENUE

Equipment Construction Operations

70%

30%

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How can 5G be cheaper by GB?

Backhaul is major cost factor

“Backhaul costs represent almost 6% … of a wireless carrier total operating

expenses (OPEX) and 30% of total network costs.”

Re-use existing fiber to residential users

Requires cooperation of cable/FTTH provider

Reduce license cost for spectrum  unlicensed, mmWave

first step: LTE-U

IMS 5G SUMMIT

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Network architecture

IMS 5G SUMMIT

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Networks 1G through 4Gish

IMS 5G SUMMIT

national carrier

ne subscriber,
ne phone,
ne provider

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Complexity kills

IMS 5G SUMMIT

IMS

SLIDE 15

IMS /VoLTE

IMS 5G SUMMIT

IMS = It Mostly Speaks VoLTE = Voice-Only Later than Expected

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LTE-U 802.11n LTE

5G – what exactly is a carrier?

IMS 5G SUMMIT

Level3 Cogent

Spectrum DB Spectrum DB

40k towers each (US)

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LTE – one carrier, plus roaming

IMS 5G SUMMIT

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5G: Carriers as consumer brand

IMS 5G SUMMIT

Outside Inside

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What are carriers good at?

Research? Software development?

Who is going to develop those 5G SDN applications?

OTT applications? API-based services?

Why did Twilio and Tropo offer voice service APIs and not the ILECs?

IMS 5G SUMMIT

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The law of new networks

“Any new network technology will be justified

n (finally) providing QoS”

To succeed, they have to provide good-enough QoS for best effort

at least with competition

The business model for QoS is difficult

see bypass toll roads

QoS is usually not accessible to applications

or not end-to-end

IMS 5G SUMMIT

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5G prototype: Eduroam

IMS 5G SUMMIT

SLIDE 22

5G opportunities beyond hype

Applications surprise Low cost per GB carried (capex & opex) may beat QoS

fixed wireless and predictable motion (trains!) may be initial opportunity

Complexity kills

layering (1984) and information hiding is still a good engineering principle

5G: 4G++ or opportunity for re-thinking design assumptions

complexity vs. modularity

IMS 5G SUMMIT