nanog mailing list archives
Re: IoT - The end of the internet
From: William Herrin <bill () herrin us>
Date: Wed, 10 Aug 2022 22:38:18 -0700
On Wed, Aug 10, 2022 at 3:29 PM Christopher Wolff <chris () vergeinternet com> wrote:
Use Case 1: Augmented Reality/Virtual Reality. It is stated that round trip latency must be <4ms with 100mbit full duplex at the cell edge to prevent nausea and dizziness while wearing goggles for a long term.
Hi Christopher, Not really IOT. Call it Netflix Part Two. Look for the discussions around Netflix's impact on the Internet. I recall some folks calculating what it would take for every household to stream their television via the Internet and fretting over it. Needless to say, folks are streaming their TV and the Internet hasn't collapsed.
Use Case 2: A little closer to “IoT”. An autonomous vehicle under remote control requires 100 feet to stop with LTE vs 20 feet with 5G. Use Case 3: A Lidar near-miss sensor at an intersection requires 1ms from the traffic operations center.
These sound like absolutely terrible designs. IoT does NOT imply that all the compute is located remotely or that local comms can or should be relayed through a central system. So your near-miss sensor sends its packets out local radio, cryptographically authenticated with a key the vehicle collected from central while it was still two blocks away. No latency difference. Think of these devices like the Mars Rovers. The Mars Rovers aren't operated by a dude with a screen and a joystick. They receive directions from central but follow them autonomously. If in the course of following the directions they exceed any of dozens of safety parameters, they stop and wait for new instructions.
Will tomorrow’s applications require a re-thinking of “The Internet” and protocols that are low latency compliant?
No, because speed of light constraints will continue to cause us to implement the latency-critical components close to the user. It's basic physics man. Regards, Bill Herrin -- For hire. https://bill.herrin.us/resume/
Current thread:
- Re: IoT - The end of the internet, (continued)
- Re: IoT - The end of the internet Randy Bush (Aug 10)
- Re: IoT - The end of the internet Doug Barton (Aug 10)
- Re: IoT - The end of the internet Owen DeLong via NANOG (Aug 10)
- Re: IoT - The end of the internet Ca By (Aug 09)
- Re: IoT - The end of the internet Alexander Lyamin via NANOG (Aug 10)
- Re: IoT - The end of the internet Christopher Wolff (Aug 10)
- Re: IoT - The end of the internet Ca By (Aug 10)
- Re: IoT - The end of the internet Mel Beckman (Aug 10)
- Re: IoT - The end of the internet Owen DeLong via NANOG (Aug 10)
- Re: IoT - The end of the internet Jorge Amodio (Aug 10)
- Re: IoT - The end of the internet William Herrin (Aug 10)
- Re: IoT - The end of the internet William Herrin (Aug 10)
- Re: IoT - The end of the internet Alexander Lyamin via NANOG (Aug 10)
- Re: IoT - The end of the internet Owen DeLong via NANOG (Aug 10)
- RE: IoT - The end of the internet Chris Wright (Aug 10)
- Re: IoT - The end of the internet Etienne-Victor Depasquale via NANOG (Aug 10)
- RE: IoT - The end of the internet Vasilenko Eduard via NANOG (Aug 11)