Re: [gaia] [5gangip] 5G: It's the Network, Stupid

Ingemar Johansson S <> Thu, 17 December 2015 07:40 UTC

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From: Ingemar Johansson S <>
To: Dirk Kutscher <>, "" <>, "" <>, gaia <>, "" <>, "" <>, "" <>
Thread-Topic: [5gangip] 5G: It's the Network, Stupid
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Date: Thu, 17 Dec 2015 07:25:37 +0000
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Subject: Re: [gaia] [5gangip] 5G: It's the Network, Stupid
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Thanks for an interesting blog post. Parts of this is above my head so I only comment on the parts that I know well
AQM and ECN : Agree fully, there seems to be a general tendency to overlook the basic elements in congestion management in networks. Quite often  one see reports of roundtrip times of 1 second or more in LTE networks. High RTT was also part of the problem formulation in the UPCON WI but as I recall it, the role of (lack of) AQM and ECN  was missed.
ConEx : What is your view of ConEx ?. The work is wrapping up, but as I see it the interest in the "end to end" ConEx is quite modest. Do you envision more local deployments like what is outlined in draft-ietf-conex-mobile ?.


From: Dirk Kutscher []
Sent: den 16 december 2015 19:41
To:;; gaia;;;
Subject: [5gangip] 5G: It's the Network, Stupid

[apologies for cross-posting]


I have written up a few thoughts on current discussions around 5G and network evolution. I might publish this as paper later, but wanted to get it out early and ask for comments - so would be grateful for any feedback. It's not very polished and slightly long, but hopefully understandable enough. Take it as a "position paper" for now.

Current 5G network discussion are often focusing on providing more comprehensive and integrated orchestration and management functions in order to improve "end-to-end" managebility and programmability, derived from NGMN and similar requirements. While these are important challenges, this memo takes the perspective that in order to arrive at a more powerful network, it is important to understand the pain points and the reasons for certain design choices of today's networks. Understanding the drivers for traffic management systems, middleboxes, CDNs and other application-layer overlays should be taken as a basis for analyzing 5G uses cases and their requirements. In this memo, I am making the point that many of today's business needs and the ambitious 5G use cases do call for a more powerful data forwarding plane, taking ICN as an example. Features of such a forwarding plane would include better support for heterogeneous networks (access networks and whole network deployments), multi-path communication, in-network storage and implementation of operator policies. This would help to avoid overlay silos and finally simplify network management.