Re: For Monday's technical plenary - Review of draft-tschofenig-post-standardization-00

[Hannes Tschofenig <hannes.tschofenig@xxxxxxx>]

Dave, 

I explain the change with two figures in order not to be misunderstood (again). 

I use SIP as an example; Jonathan gave a nice presentation.

Working Assumption previously: 

    ............................          ..............................

    .                          .          .                            .

    .                +-------+ .          . +-------+                  .

    .                |       | .  SIP     . |       |                  .

    .                | Proxy |------------- | Proxy |                  .

    .                |   1   | .          . |  2    |                  .

    .                |       | .          . |       |                  .

    .              / +-------+ .          . +-------+ \                .

    .             /            .          .            \               .

    .            /             .          .             \  SIP         .

    .     SIP   /              .          .              \             .

    .          /               .          .               \            .

    .         /                .          .                \           .

    .        /                 .          .                 \          .

    .       /                  .          .                  \         .

    .   +-------+              .          .                +-------+   .

    .   |       |              .          .                |       |   .

    .   |       |              .          .                |       |   .

    .   | UA 1  |              .          .                | UA 2  |   .

    .   |       |              .          .                |       |   .

    .   +-------+              .          .                +-------+   .

    .              Domain A    .          .   Domain B                 .

    ............................          ..............................

                        Figure 1: The SIP trapezoid

We have lots of standardization efforts that focus on the UA<->Proxy leg in the RAI area. 

Suggested new working assumption: 

                +-----------+             +-----------+
                |   Web/    |             |   Web/    |
                |   SIP     |     SIP     |   SIP     |
                |           |-------------|           |
                |  Server   |             |  Server   |
                |     1     |             |     2     |
                +-----------+             +-----------+
                     /                           \
                    /                             \   Proprietary over
                   /                               \  HTTP/Websockets
                  /                                 \
                 /  Proprietary over                 \
                /   HTTP/Websockets                   \
               /                                       \
         +-----------+                           +-----------+
         |JS/HTML/CSS|                           |JS/HTML/CSS|
         +-----------+                           +-----------+
         +-----------+                           +-----------+
         |           |                           |           |
         |           |                           |           |
         |  Browser  | ------------------------- |  Browser  |
         |           |          Media            |           |
         |           |                           |           |
         +-----------+                           +-----------+

                      Figure 2: Browser RTC Trapezoid

The server-to-server interaction I was referring to in my previous mail is the interaction between server 1 to server 2. With cross-domain usage there still a standardization need. This is what I mean by "the interoperability need shifts". 

We had spoken about the implications of that change already.

Ciao

Hannes

On 3/29/2011 1:31 PM, Hannes Tschofenig wrote:

Correct.

The interoperability need shifts away from the client-to-server side (for

example, to the server-to-server side;

No, that's wrong and I believe it is not what Eric said at all.

THERE IS STILL A CLIENT/SERVER PROTOCOL, HANNES.

ALL THAT CHANGES IS THAT THE CLIENT/SERVER PROTOCOL IS NOW PROPRIETARY.

I apologize for shouting.  I'm shouting for the classic reason that I'm taking your continuing to misunderstand this multiply-repeated and very basic point as a hearing problem.

Server-server is an entirely different task and different part of the architecture.

d/

--

Dave Crocker

Brandenburg InternetWorking

bbiw.net

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