[Dcpel] DCPEL BoF support from Telefonica I+D

Hello Kathleen, Paulo, all,

I would like to express our support from Telefonica I+D (advanced 
networks department) to the BoF session regarding DCPEL and to the 
creation of a WG to work around these concepts.

 From our perspective, the coordination among control planes belonging 
to different operators is a key point in order to deploy end-to-end 
services with QoS differentiation, that is, across operator network 
domains. And there is a lack of suitable solutions in the current 
Internet architecture in this field.

As some of you have commented, one main requirement from an operator 
perspective is to avoid to expose the network internals to external 
actors for security reasons. In this sense, it is hard for an operator 
to allow a distributed configuration of its network infrastructure by 
means of signalling messages coming form other networks/operators. 
Therefore, a different approach, probably based on devices negotiating 
inter-domain agreements and then configuring their internals to apply 
the negotiated inter-domain agreements, would be more suitable.

In addition, this kind of approach provides flexibility for domains to 
use different mechanisms to provide differentiated QoS internally. This 
means not only non-DiffServ solutions, but also different ways to 
use/configure DiffServ mechanisms.

As some of you also commented, there are different fora (e.g. ITU-T, 
3GPP, ETSI-TISPAN, IPSphere) that are defining architectures with a 
similar overall view in mind, but this must be seen as an opportunity 
for the IETF to align their views with common protocols and mechanisms 
that these fora are not going to specify. In fact, they look at the IETF 
for protocols to be used/adapted to implement their architectures...

Among the topics to cover, I see of special need/interest the 
standardisation of a common service information model to have a common 
language for inter-domain negotiation, and also the analysis of current 
signalling protocols to find a solution for the inter-domain signalling 
among different control plane managers. From my work on european 
research projects, the Ambient Networks and EuQoS projects have made an 
interesting work on these topics, so they should be considered as 
existing work for the WG.

Best regards,
Jorge

-- 
Jorge Andrés Colás
Telefónica I+D
Emilio Vargas, 6
28043 - Madrid (España)

E-mail: jorgeac@tid.es
Tel. +34 91 337 39 28
Fax. +34 91 510 33 08

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