Re: [Apn] [arch-d] Questions for APN: Q#5

Lars Eggert <lars@eggert.org> Tue, 22 September 2020 06:44 UTC

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From: Lars Eggert <lars@eggert.org>
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Date: Tue, 22 Sep 2020 09:44:45 +0300
Cc: apn <apn@ietf.org>, huitema <huitema@huitema.net>, pengshuping <pengshuping@huawei.com>, =?utf-8?B?5pu555WF?= <caoc15@chinaunicom.cn>, "network-tokens@ietf.org" <network-tokens@ietf.org>, "architecture-discuss@iab.org" <architecture-discuss@iab.org>
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Subject: Re: [Apn] [arch-d] Questions for APN: Q#5
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Hi,

On 2020-9-22, at 9:02, zhangs366@chinaunicom.cn wrote:
> [Shuping] Again APN is aimed to work within a controlled and limited operators’ network domain not for Internet.

that significantly limits the attractiveness of this proposal to application vendors. They can either buy into APN and ship an app that only works in some (initially, very few to none) operator networks. Or, they can ship a slightly less optimal app that works on the entire Internet with its billions of users.

More broadly, I'd like to point out that during the entire history of the Internet there were application classes that the deployed networks at the time were struggling to support. There were always claims that something like APN was needed, i.e, solutions that were intending to improve network performance and quality but that were also adding significant complexity and often required application changes.

What always happened so far was that Moore's law solved these problems, by improving the performance and quality of the general Internet so that best effort was sufficient to support all these "special" applications a few years down the road.

The same will happen with the use cases presented to motivate the need for APN. The general Internet may struggle to support them now, but in five years or so - which is about the time horizon for any APN enablement of any operator network to happen - these will just work.

Thanks,
Lars