From owner-ip-dvb@erg.abdn.ac.uk Mon May  5 13:19:09 2003
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Date: Mon, 05 May 2003 13:18:12 +0100
From: Dr G Fairhurst <gorry@erg.abdn.ac.uk>
Organization: ERG, Aberdeen, UK
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To: ghommam mohsen <ghommam2002@yahoo.fr>
CC: ip-dvb@erg.abdn.ac.uk
Subject: Re: help
References: <20030504202443.81044.qmail@web14506.mail.yahoo.com>
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The current ID was published some months ago, and the authors would
like to update it soon, so these thoughts come at a good time....

ghommam mohsen wrote:
> 
> Hello and thank you for your help, so I want to clarify with you the
> following points:
> 
> These questions are dealing with a new optimised method for
> encapsulation of packets: Data piping to minimise overhead of MPE ( 16
> bytes)
> 
> 1.the LL_pid ( 2 bytes) and packet lengh (2 bytes) are used in the IP
> format packet ( level 3 of IP V4) proposed by Mr Clausen ( working on
> this solution, so this is why also we can avoid them, at level 2, what
> do you think?
> 


Can you explain more about how you propose to find the length of a
frame (SNDU) at the receiver?

> 2.to distinguish between traffics ( vidéo, IP, etc) we can use the PID
> ( 13 bits) of TS MPEG, so no need of LL_pid and lengh in the
> encapsulation?

So, the encapauslation would normally be used with IP traffic, and
MPEG video would be sent with a different PID - unless it was using
RTP (etc) to send it as IP packets. In fact, I'd expect many applications
to carry several PIDs on the same MPEG-2 TS, each using the encapsulation,
to provide more flexibility.

> 3.May be we need only CRC ( 4 bytes) please why, it is 4 bytes?
 
Because that seems to be safe (see the work in the IETF PILC WG)

> Regading the points above, I think the overhead in datapiping will be
> only 4 bytes (CRC) or 0 bytes, if we can avoid CRC ?

Avoiding a CRC - or using a weak CRC - means that (a) you have to 
provide a reliable way to detect MPEG-2 TS Packet loss, multiplexing
errors, etc. (b) You also need to provide guarentees that the MUX, Gateway
and Receiver do not corrupt packets. This may be harder. Since IP
relies on this information for proper operation, it's safest to 
provide this at this layer - an assumption of IPv6.

> Please I need your comments about what I have said.
> 
> Another thing is what other parameters than overhead, we can measure,
> for example to install quality of service and measure it ( can you
> give an idea how to simulate or to implement the quality of service
> for datapiping and measure it, please give some WWW links useful to
> find these information or send some of them by mail if you have this
> information.

Perhaps someone else on this list has information to hand?

> and thank you very much
> 
> ----------------------------------------------------------------------
> Do You Yahoo!? -- Une adresse @yahoo.fr gratuite et en français !
> Testez le nouveau Yahoo! Mail

Gorry Fairhurst.

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From: "De Schepper Raf" <raf.deschepper@vtk.be>
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Subject: question about MPE and AAL5 over satellites
Date: Mon, 12 May 2003 16:45:55 +0200
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Hello,

I am an engineering student, currently working on my thesis in =
cooperation with Alcatel about security on the ethernet layer in =
satellite networks. The network I have considered in my work uses PPPoE =
encapsulated by MPE in MPEG transport streams for the forward link and =
encapsulated by AAL5 in ATM for the return link. If you insert security =
fields, the possibility exists that the payload of the ethernet frame =
becomes larger than the allowed 1500 bytes. My question is now whether =
it is possible to modify MPE and AAL5 to allow frames with payloads =
larger than 1500 bytes to be inserted?

It would help me a lot if someone could answer this question for me =
since I studied the MPE and AAL5 standard and did not find an exact =
answer for this question.

Thanks in advance,

Raf De Schepper
Department of electronics engineering - ESAT
KU Leuven
Belgium
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<DIV><FONT face=3DArial size=3D2>Hello,</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>I am an engineering student, currently =
working on=20
my thesis in cooperation with Alcatel&nbsp;about security on the =
ethernet layer=20
in satellite networks. The network I have considered in my work uses =
PPPoE=20
encapsulated by MPE in MPEG transport streams for the forward link and=20
encapsulated by AAL5 in ATM for the return link. If you insert security =
fields,=20
the possibility exists that the payload of the ethernet frame becomes =
larger=20
than the allowed 1500 bytes. My question is now whether it is possible =
to modify=20
MPE and AAL5 to allow frames with payloads larger than 1500 bytes to be=20
inserted?</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>It would help me a lot if someone could =
answer this=20
question for me since I studied the MPE and AAL5 standard and did not =
find an=20
exact answer for this question.</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>Thanks in advance,</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>Raf De Schepper<BR>Department of =
electronics=20
engineering - ESAT<BR>KU Leuven<BR>Belgium</FONT></DIV></BODY></HTML>

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Subject: RE: question about MPE and AAL5 over satellites
Date: Mon, 12 May 2003 18:40:50 +0300
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Thread-Topic: question about MPE and AAL5 over satellites
Thread-Index: AcMYl5hWx4oTY4mgTkSrea3YkOj4eAAApSvw
From: <Matti.Puputti@nokia.com>
To: <raf.deschepper@vtk.be>
Cc: <ip-dvb@erg.abdn.ac.uk>
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Hi Raf,
=20
I'm not familiar with AAL5, and do not have the specification available.
However, about MPE I can tell following:

Length of an MPE section is indicated with 12 bits, and shall not exceed =
4093 (Bytes).
Overhead caused by the MPE section header is 13 Bytes, leaving 4080 =
Bytes for the payload.
=20
As one datagram may be divided on max 256 sections, the absolute maximum =
size for Layer 3 datagram carried on MPE is (256 * 4080) =3D 1 044 480 =
Bytes.
=20
However, in case of IP datagrams, one datagram shall be delivered in a =
single MPE section.
This results the maximum size of an IP datagram being 4080 Bytes.

=20
Matti Puputti, Senior System Specialist=20
Nokia Ventures Organization/IPDC=20
P.O.Box 4, FIN-20521 TURKU=20
Phone: +358 7180 33473, Fax: +358 7180 33 232=20
Mobile: +358 50 383 4683=20
-------------------------------------------------------=20
- There's no business like new business -=20
          Nokia Ventures Organization=20

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<DIV><FONT face=3DArial size=3D2><SPAN class=3D626352115-12052003>Hi=20
Raf,</SPAN></FONT></DIV>
<DIV><FONT face=3DArial size=3D2><SPAN=20
class=3D626352115-12052003></SPAN></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2><SPAN class=3D626352115-12052003>I'm =
not familiar=20
with AAL5, and do not have the specification =
available.</SPAN></FONT></DIV>
<DIV><FONT face=3DArial size=3D2><SPAN =
class=3D626352115-12052003>However, about MPE I=20
can tell following:</SPAN></FONT></DIV>
<BLOCKQUOTE dir=3Dltr style=3D"MARGIN-RIGHT: 0px">
  <DIV><FONT face=3DArial size=3D2><SPAN =
class=3D626352115-12052003>Length of an MPE=20
  section is indicated with 12 bits, and shall not exceed 4093=20
  (Bytes).</SPAN></FONT></DIV>
  <DIV><FONT face=3DArial size=3D2><SPAN =
class=3D626352115-12052003>Overhead caused by=20
  the MPE section header is 13 Bytes, leaving 4080 Bytes for the=20
  payload.</SPAN></FONT></DIV>
  <DIV><FONT face=3DArial size=3D2><SPAN=20
  class=3D626352115-12052003></SPAN></FONT>&nbsp;</DIV>
  <DIV><FONT face=3DArial size=3D2><SPAN class=3D626352115-12052003>As =
one datagram=20
  may be divided on max 256 sections, the absolute maximum size for =
Layer 3=20
  datagram carried on MPE is (256 * 4080) =3D 1 044 480 =
Bytes.</SPAN></FONT></DIV>
  <DIV><FONT face=3DArial size=3D2><SPAN=20
  class=3D626352115-12052003></SPAN></FONT>&nbsp;</DIV>
  <DIV><FONT face=3DArial size=3D2><SPAN =
class=3D626352115-12052003>However, in case=20
  of IP datagrams, one datagram shall be delivered in a single MPE=20
  section.</SPAN></FONT></DIV>
  <DIV><FONT face=3DArial size=3D2><SPAN class=3D626352115-12052003>This =
results the=20
  maximum size of an IP datagram being 4080=20
Bytes.</SPAN></FONT></DIV></BLOCKQUOTE>
<DIV><FONT face=3DArial color=3D#0000ff size=3D2><SPAN =
class=3D626352115-12052003><FONT=20
color=3D#000000><FONT face=3D"Nokia Sans" size=3D2>
<DIV><FONT face=3DArial size=3D2><SPAN=20
class=3D626352115-12052003></SPAN></FONT>&nbsp;</DIV>Matti Puputti, =
Senior System=20
Specialist</FONT> <BR><FONT face=3D"Nokia Sans" size=3D2>Nokia Ventures=20
Organization/IPDC</FONT> <BR><FONT face=3D"Nokia Sans" size=3D2>P.O.Box =
4, FIN-20521=20
TURKU</FONT> <BR><FONT face=3D"Nokia Sans" size=3D2>Phone: +358 7180 =
33473, Fax:=20
+358 7180 33 232</FONT> <BR><FONT face=3D"Nokia Sans" size=3D2>Mobile: =
+358 50 383=20
4683</FONT> <BR><FONT face=3D"Nokia Sans"=20
size=3D2>-------------------------------------------------------</FONT>=20
<BR></FONT><FONT face=3D"Nokia Sans Wide" color=3D#0000ff size=3D2>- =
There's no=20
business like new business -</FONT> <BR><FONT face=3D"Nokia Sans Wide"=20
color=3D#0000ff =
size=3D2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
Nokia Ventures Organization</FONT> </SPAN></FONT></DIV></BODY></HTML>

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From owner-ip-dvb@erg.abdn.ac.uk Mon May 12 23:21:23 2003
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From: "Clawson, Michael" <mclawson@loralskynet.com>
To: "'ip-dvb@erg.abdn.ac.uk'" <ip-dvb@erg.abdn.ac.uk>
Cc: "'De Schepper Raf '"
	 <IMCEASNMP-raf+2Edeschepper+40vtk+2Ebe@cyberstar.com>
Subject: RE: question about MPE and AAL5 over satellites
Date: Mon, 12 May 2003 18:19:42 -0400
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The premise of your question seems to be that MPE and/or AAL5 limit payloads
to 1500 bytes.  They don't; Ethernet does.

-----Original Message-----
From: De Schepper Raf [mailto:raf.deschepper@vtk.be]
Sent: Monday, May 12, 2003 10:46 AM
To: ip-dvb@erg.abdn.ac.uk
Subject: question about MPE and AAL5 over satellites


Hello,
 
I am an engineering student, currently working on my thesis in cooperation
with Alcatel about security on the ethernet layer in satellite networks. The
network I have considered in my work uses PPPoE encapsulated by MPE in MPEG
transport streams for the forward link and encapsulated by AAL5 in ATM for
the return link. If you insert security fields, the possibility exists that
the payload of the ethernet frame becomes larger than the allowed 1500
bytes. My question is now whether it is possible to modify MPE and AAL5 to
allow frames with payloads larger than 1500 bytes to be inserted?
 
It would help me a lot if someone could answer this question for me since I
studied the MPE and AAL5 standard and did not find an exact answer for this
question.
 
Thanks in advance,
 
Raf De Schepper
Department of electronics engineering - ESAT
KU Leuven
Belgium


From owner-ip-dvb@erg.abdn.ac.uk Tue May 13 06:52:26 2003
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X-WebMail-UserID:  williams77
Date: Tue, 13 May 2003 01:48:59 -0400
From: William StanisLaus <williams77@mailandnews.com>
To: <raf.deschepper@vtk.be>, ip-dvb@erg.abdn.ac.uk
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Subject: RE: question about MPE and AAL5 over satellites
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Hi Raf,
      Good Day, I don't see any limitations on 1500 bytes for AAL5 or MPE, 
Since for MPE we have length Field as 12 bits which means can carry upto 2^12 
4096 bytes including MPE header. and for AAL5 we have length Field as 16 bits 
which means 2^16 65536 bytes including AAL5 header. So it should not be a 
problem for you to apply security overhead, which can be max of 100 bytes 
overhead if you are using IPSec.

Have a nice day

Regards,
William.




>===== Original Message From ip-dvb@erg.abdn.ac.uk =====
>Hi Raf,
>
>I'm not familiar with AAL5, and do not have the specification available.
>However, about MPE I can tell following:
>
>Length of an MPE section is indicated with 12 bits, and shall not exceed 4093 
(Bytes).
>Overhead caused by the MPE section header is 13 Bytes, leaving 4080 Bytes for 
the payload.
>
>As one datagram may be divided on max 256 sections, the absolute maximum size 
for Layer 3 datagram carried on MPE is (256 * 4080) = 1 044 480 Bytes.
>
>However, in case of IP datagrams, one datagram shall be delivered in a single 
MPE section.
>This results the maximum size of an IP datagram being 4080 Bytes.
>
>
>Matti Puputti, Senior System Specialist
>Nokia Ventures Organization/IPDC
>P.O.Box 4, FIN-20521 TURKU
>Phone: +358 7180 33473, Fax: +358 7180 33 232
>Mobile: +358 50 383 4683
>-------------------------------------------------------
>- There's no business like new business -
>          Nokia Ventures Organization


From owner-ip-dvb@erg.abdn.ac.uk Fri May 16 13:05:19 2003
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From: Laurence.Duquerroy@space.alcatel.fr
To: ip-dvb@erg.abdn.ac.uk
cc: Sebastien.Josset@space.alcatel.fr, Isabelle.Buret@space.alcatel.fr,
   satip6@tilab.com
Message-ID: <C1256D28.00421D8B.00@vzmta01.netfr.alcatel.fr>
Date: Fri, 16 May 2003 14:02:58 +0200
Subject: "Flat Multicast Key Exchange (FMKE)"- Internet Draft
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Hello,

In  the context of the SatIP6 IST project, Alcatel Space studies a multicast
security scheme optimised to protect large multicast groups. Such a scheme is
designed for IP over Satellite, Wifi or DVB systems; it is a security solution
for the satellite segment. An implementation over DVB-S/RCS is planned in the
SatIP6 demonstrator.
We have presented this security solution (called SatIPSec) during the ESA
workshop at ESTEC, 13-14 May on "IP networking over satellite".

We have started to write an Internet Draft detailing our key exchange protocol
(called "Flat Multicast Key Exchange (FMKE)"), and we think that it could be
submitted to the "IP over DVB " group, as IP over DVB systems are targeted
systems. We would be ready to present it to the next IETF meeting (in Vienna).
As it is very security-oriented, it will probably also be submitted to an IETF
security group (i.e. MSEC (Multicast Security) WG).

You will find in attachment a draft of the ID. Your comments, opinion,  and
feedback on it are welcome.
(See attached file: draft-duquer-fmke-00.doc)

This solution is very flexible. It is able to configure any security dataplane
at layer 2 or 3 ( IPv4/6 IPSec, L2 security dataplanes...).
It is based on similar principles to the ones of the protocols currently defined
in the IETF MSEC group. It uses also similar messages (based on the ISAKMP
standard protocol). However it implements additional mechanisms and features in
order to provide a security solution optimized for satellite systems:

     -  It is defined to be low ressource consuming in bandwidth
     -  It provides a reliable key distribution ( unlike the GDOI and GSAKMP
protocols)
     -  It can be used in one-to-many and many-to-many scenarios, and is
scalable in these scenarios (MIKEY cannot be used in many-to-many scenarios in
large groups)
     -  It provides a multicast re-keying (mandatory in large groups) (unlike
MIKEY)
     - etc

We hope that you will find interest in it, and thank you in advance for your
comments.

Best regards,

Laurence Duquerroy

ALCATEL SPACE
RT/ST
Research Department / Advanced Telecom Satellite Systems
Tel : 33 (0)5-34-35-63-06  /  Fax : 33 (0)5-34-35-55-60
E-Mail : laurence.duquerroy@space.alcatel.fr

--0__=jJPmS3C4COv02eMEmFpSD5ZeUlNCbZwK0cUEXwPKSXKCCbW2KuCoSTuI
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--0__=jJPmS3C4COv02eMEmFpSD5ZeUlNCbZwK0cUEXwPKSXKCCbW2KuCoSTuI--


From owner-ip-dvb@erg.abdn.ac.uk Mon May 19 11:06:21 2003
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Date: Mon, 19 May 2003 11:05:31 +0100
From: Dr G Fairhurst <gorry@erg.abdn.ac.uk>
Organization: ERG, Aberdeen, UK
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To: ip-dvb@erg.abdn.ac.uk
Subject: 57th IETF Meeting - Vienna, Austria
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I knwo several people on this list are not on the IETF announcement list,
so here's a copy of teh cut-off dates for the next IETF.

The 57th IETF Meeting will be held in Vienna, Austria, see:

http://www.ietf.org/meetings/IETF-57.html

Important Meeting Dates

April 14, Monday - Working Group and BOF scheduling begins
Week of April 15 - Registration begins

June 20, Friday - Working Group and BOF scheduling closes at 17:00 ET
June 23, Monday - Internet Draft Cut-off for initial document (-00)
submission at 09:00 ET
June 30, Monday - Internet Draft final submission cut-off at 09:00 ET
June 30, Monday - Registration and Pre-payment cut-off at 12:00 noon ET

July 7, Monday - Registration cancellation cut-off at 17:00 ET
July 8, Tuesday - Working Group agendas due date at 12:00 ET
July 13-18 - 57th IETF Meeting in Vienna, Austria

August 15, Friday - Proceedings submission cutoff date by 17:00 ET

* All times are in US Eastern Time

From owner-ip-dvb@erg.abdn.ac.uk Mon May 19 18:42:35 2003
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Date: Mon, 19 May 2003 18:41:52 +0100
From: Dr G Fairhurst <gorry@erg.abdn.ac.uk>
Organization: ERG, Aberdeen, UK
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Two new "draft" Internet Drafts are now available for comments.

Lightweight Encapsulation rev 01
http://www.erg.abdn.ac.uk/users/gorry/ip-dvb/ids/draft-unisal-ipdvb-enc-01.txt

Ultra Lightweight Encapsulation (ULE) rev 00
http://www.erg.abdn.ac.uk/users/gorry/ip-dvb/ids/draft-fair-ipdvb-ule-00.txt



These two drafts capture the comments the authors have received on the encapsulation.
In answering the comments from people concerning how to implement, we discovered
there were in fact two varients of the protocol. 

* One was oriented to a wide range of transport services and was based
on PES
  packets - it thus could be used in a very flexible way. It employs the AFC
  bits and an adaptation field for framing.

*  The other approach (ULE)  is based solely on "raw" transport streams. 
   This does NOT use the adaptation field, and it can NOT be used for
PES streams.
   It uses a pointer signalled by the PUSI to synchronise framing.

To get the best possible feedback, and to avoid confusion when we
discuss these,
the authors agreed to split the protocols into the two separate drafts.
That's why
you suddenly see two ID's in place of the one. So, let's debate the pros/cons!

We can go forward with one of these, both of these in a combined encapsulation,
or some other scheme - if there are comments, suggestions, please do say soon!

Gorry & Bernhard.

From owner-ip-dvb@erg.abdn.ac.uk Mon May 19 19:11:43 2003
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Message-ID: <3EC91E3D.64BB264@erg.abdn.ac.uk>
Date: Mon, 19 May 2003 19:11:08 +0100
From: Dr G Fairhurst <gorry@erg.abdn.ac.uk>
Organization: ERG, Aberdeen, UK
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To: ip-dvb@erg.abdn.ac.uk, "Surtees, Abigail" <abigail.surtees@roke.co.uk>
Subject: Re: Adaptation field
References: <76C92FBBFB58D411AE760090271ED41804B88750@rsys002a.roke.co.uk>
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Sorry, I missed your posting in my mail box.  Here's a belated reply.

"Surtees, Abigail" wrote:
> 
> Hi,
> 
> I've just started looking ip-over-dvb and have a question about part of 
> draft-clausen-ipdvb-enc-00.txt which I hope someone can answer.
> 
> On page 10 there is a table showing the meaning of the PUSI and AFC bits in 
> the TS packet header, followed by 2 paragraphs of explanation.  
> The second paragraph says:
> "
>         The TS Packet that carries the last byte of a SNDU MUST always have
>         an adaptation field. In case this was the last SNDU (0/11 PUSI/AFC)
>         the TS Packet is filled with stuffing bytes. In case another SNDU
>         starts in this TS Packet, another 4-byte adaptation field is
>         inserted before the next SNDU. "
> 
> I think this means that the adaptation field is used as stuffing bytes 
> when there are no more SNDUs, so there will be 184 - x bytes of stuffing 
> where x is the length of the last part of 
> the SNDU.  Is this correct?

Yes, the adaption field could also be used as a part of the framing, to tell
the receiver that an MPEG-2 TS Packet contains the start of a new SNDU. If
the receiver happens to loose synch this is how it resynchs. 

> 
> If there is another SNDU does 'another 4-byte adaptation field' mean the 
> one that is always carried or another one on top of that?  In other words, do you get
>   ________________ ____________ ______________
>   ... end of SNDU | adap field | next SNDU ...
>   ________________ ____________ ______________
> 
> or
>   ________________ ____________ ____________ _____________
>   ... end of SNDU | adap field | adap field | next SNDU...
>   ________________ ____________ ____________ _____________
> 
> ?
 
Well, neither really.  The adpoation field comes directly after the
MPEG-2 TS Packet 
header. So, Bernhard has drawn some diagrams in the latest version of
this draft,
to try and get things clearer.


> Thanks,
> 
> Abbie
> 
> Abbie Surtees
> Engineer
> Internet Applications and Mobility
> Roke Manor Research Ltd
> Tel:   +44 (0) 1794 833131
> 
> Permission is hereby granted to pass the contents of this communication to third 
> parties and any restrictions regarding confidentiality do not apply.
> 
>   ------------------------------------------------------------------------
>                           Name: RMRL-Disclaimer.txt
>    RMRL-Disclaimer.txt    Type: Plain Text (text/plain)
>                       Encoding: 7bit


The new rev of the draft will hopefully be clearer, but I'd still like
you to follow
up on your question and reply, if it applies also to the new rev of the
draft (-01).

Gorry

From owner-ip-dvb@erg.abdn.ac.uk Wed May 21 06:08:23 2003
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Date: Wed, 21 May 2003 01:05:14 -0400
From: William StanisLaus <williams77@mailandnews.com>
To: Dr G Fairhurst <gorry@erg.abdn.ac.uk>, ip-dvb <ip-dvb@erg.abdn.ac.uk>
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Hi Fairhurst,
     Thanks for the drafts.. I am a new bee.. and have a basic question, Does 
these Encapsulations is to replace DSM-CC... in MPE ??.
     How do we do MAC filtering in DVB Receivers, If MPE doesn't have 
information about Destination MAC address ??

Thanks in advance.

Best Regards,
William.

>===== Original Message From Dr G Fairhurst <gorry@erg.abdn.ac.uk> =====
>Two new "draft" Internet Drafts are now available for comments.
>
>Lightweight Encapsulation rev 01
>http://www.erg.abdn.ac.uk/users/gorry/ip-dvb/ids/draft-unisal-ipdvb-enc-01.tx
t
>
>Ultra Lightweight Encapsulation (ULE) rev 00
>http://www.erg.abdn.ac.uk/users/gorry/ip-dvb/ids/draft-fair-ipdvb-ule-00.txt
>
>
>
>These two drafts capture the comments the authors have received on the 
encapsulation.
>In answering the comments from people concerning how to implement, we 
discovered
>there were in fact two varients of the protocol.
>
>* One was oriented to a wide range of transport services and was based
>on PES
>  packets - it thus could be used in a very flexible way. It employs the AFC
>  bits and an adaptation field for framing.
>
>*  The other approach (ULE)  is based solely on "raw" transport streams.
>   This does NOT use the adaptation field, and it can NOT be used for
>PES streams.
>   It uses a pointer signalled by the PUSI to synchronise framing.
>
>To get the best possible feedback, and to avoid confusion when we
>discuss these,
>the authors agreed to split the protocols into the two separate drafts.
>That's why
>you suddenly see two ID's in place of the one. So, let's debate the 
pros/cons!
>
>We can go forward with one of these, both of these in a combined 
encapsulation,
>or some other scheme - if there are comments, suggestions, please do say 
soon!
>
>Gorry & Bernhard.


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Date: Wed, 21 May 2003 09:00:02 +0100
From: Dr G Fairhurst <gorry@erg.abdn.ac.uk>
Organization: ERG, Aberdeen, UK
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   ip-dvb <ip-dvb@erg.abdn.ac.uk>
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William StanisLaus wrote:
> 
> Hi Fairhurst,
>      Thanks for the drafts.. I am a new bee.. and have a basic question, Does
> these Encapsulations is to replace DSM-CC... in MPE ??.

Yes - for those networks that are able to change. There is a large
deployed 
base of MPE in broadcast TV service networks - it is unlikely these
deployed 
networks will move away from MPE for the foreseeable future. So co-existance
of the two schemes is important to me. New networks may choose.

There are also a large number of IP-based networks that could take
advantage of
the new encapsulation by a change of driver software. Existing networks may
upgrdae at some time. Again, new networks will have the chance to choose.

>      How do we do MAC filtering in DVB Receivers,  If MPE doesn't have
> information about Destination MAC address ??
> 

MPE has only a ***destination*** Mac address. 

It does not have a source address - which can present issues with LAN bridges,
IPv6 autoconfiguration, and some other scenarios.

It doesn't carry a protocol Type field - which requires use of further headers
to support IPv6 efficiently and other protocols, such as arp.

The requirements draft speaks of such issues - and will be re-issued in
an 
updated format within  a week. 

More questions, comments welcome !

Gorry

> Thanks in advance.
> 
> Best Regards,
> William.
> 
> >===== Original Message From Dr G Fairhurst <gorry@erg.abdn.ac.uk> =====
> >Two new "draft" Internet Drafts are now available for comments.
> >
> >Lightweight Encapsulation rev 01
> >http://www.erg.abdn.ac.uk/users/gorry/ip-dvb/ids/draft-unisal-ipdvb-enc-01.tx
> t
> >
> >Ultra Lightweight Encapsulation (ULE) rev 00
> >http://www.erg.abdn.ac.uk/users/gorry/ip-dvb/ids/draft-fair-ipdvb-ule-00.txt
> >
> >
> >
> >These two drafts capture the comments the authors have received on the
> encapsulation.
> >In answering the comments from people concerning how to implement, we
> discovered
> >there were in fact two varients of the protocol.
> >
> >* One was oriented to a wide range of transport services and was based
> >on PES
> >  packets - it thus could be used in a very flexible way. It employs the AFC
> >  bits and an adaptation field for framing.
> >
> >*  The other approach (ULE)  is based solely on "raw" transport streams.
> >   This does NOT use the adaptation field, and it can NOT be used for
> >PES streams.
> >   It uses a pointer signalled by the PUSI to synchronise framing.
> >
> >To get the best possible feedback, and to avoid confusion when we
> >discuss these,
> >the authors agreed to split the protocols into the two separate drafts.
> >That's why
> >you suddenly see two ID's in place of the one. So, let's debate the
> pros/cons!
> >
> >We can go forward with one of these, both of these in a combined
> encapsulation,
> >or some other scheme - if there are comments, suggestions, please do say
> soon!
> >
> >Gorry & Bernhard.

From owner-ip-dvb@erg.abdn.ac.uk Wed May 21 10:52:40 2003
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From: William StanisLaus <williams77@mailandnews.com>
To: gorry@erg.abdn.ac.uk, ip-dvb@erg.abdn.ac.uk
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>===== Original Message From ip-dvb@erg.abdn.ac.uk =====
>William StanisLaus wrote:
>>
>> Hi Fairhurst,
>>      Thanks for the drafts.. I am a new bee.. and have a basic question, 
Does
>> these Encapsulations is to replace DSM-CC... in MPE ??.
>
>Yes - for those networks that are able to change. There is a large
>deployed
>base of MPE in broadcast TV service networks - it is unlikely these
>deployed
>networks will move away from MPE for the foreseeable future. So co-existance
>of the two schemes is important to me. New networks may choose.
>
>There are also a large number of IP-based networks that could take
>advantage of
>the new encapsulation by a change of driver software. Existing networks may
>upgrdae at some time. Again, new networks will have the chance to choose.
>

 Is there any differentiator BITs in MPEG2-TS to figure out which MPE is USED 
(i.e. DSM-CC, ULE or Simple Encapsulation). Atleast DSM-CC should be 
interpreted seperately.

>>      How do we do MAC filtering in DVB Receivers,  If MPE doesn't have
>> information about Destination MAC address ??
>>
>
>MPE has only a ***destination*** Mac address.
>
  Yeah i agree only Destination MAC present in case of DSM-CC. But i wonder 
even Destination MAC is not present in Simple encapsulation and ULE. Is that 
because, it is used only in Broadcast medium, I mean always Link Layer 
Boardcast is done even for Network Unicast packets.

>It does not have a source address - which can present issues with LAN 
bridges,
>IPv6 autoconfiguration, and some other scenarios.
>

   Sorry i am not very sure about IPv6 :(, but for LAN Bridges, we need to 
know only the Destination MAC address to forward the packet. Packet 
forwarding/routing is done based on the destination address.

>It doesn't carry a protocol Type field - which requires use of further 
headers
>to support IPv6 efficiently and other protocols, such as arp.
>

  protocol type field in Simple encap and ULE, it also resembles the LLC-SNAP 
flag in DSM-CC, in which you can define your payload type. By default it is 
IPv4, atleast that is in our configuration.

  Also when you say Bridged Payload did you mean, tunneling Layer2 packet, 
something like L2TP.

>The requirements draft speaks of such issues - and will be re-issued in
>an
>updated format within  a week.
>
>More questions, comments welcome !
>
>Gorry

Thanks for your clarifications...

Best Regards,
William.

>
>> Thanks in advance.
>>
>> Best Regards,
>> William.
>>
>> >===== Original Message From Dr G Fairhurst <gorry@erg.abdn.ac.uk> =====
>> >Two new "draft" Internet Drafts are now available for comments.
>> >
>> >Lightweight Encapsulation rev 01
>>
>http://www.erg.abdn.ac.uk/users/gorry/ip-dvb/ids/draft-unisal-ipdvb-enc-01.tx
>> t
>> >
>> >Ultra Lightweight Encapsulation (ULE) rev 00
>>
>http://www.erg.abdn.ac.uk/users/gorry/ip-dvb/ids/draft-fair-ipdvb-ule-00.txt
>> >
>> >
>> >
>> >These two drafts capture the comments the authors have received on the
>> encapsulation.
>> >In answering the comments from people concerning how to implement, we
>> discovered
>> >there were in fact two varients of the protocol.
>> >
>> >* One was oriented to a wide range of transport services and was based
>> >on PES
>> >  packets - it thus could be used in a very flexible way. It employs the 
AFC
>> >  bits and an adaptation field for framing.
>> >
>> >*  The other approach (ULE)  is based solely on "raw" transport streams.
>> >   This does NOT use the adaptation field, and it can NOT be used for
>> >PES streams.
>> >   It uses a pointer signalled by the PUSI to synchronise framing.
>> >
>> >To get the best possible feedback, and to avoid confusion when we
>> >discuss these,
>> >the authors agreed to split the protocols into the two separate drafts.
>> >That's why
>> >you suddenly see two ID's in place of the one. So, let's debate the
>> pros/cons!
>> >
>> >We can go forward with one of these, both of these in a combined
>> encapsulation,
>> >or some other scheme - if there are comments, suggestions, please do say
>> soon!
>> >
>> >Gorry & Bernhard.


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From: William StanisLaus <williams77@mailandnews.com>
To: gorry@erg.abdn.ac.uk
Cc: ip-dvb@erg.abdn.ac.uk
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>===== Original Message From gorry@erg.abdn.ac.uk =====
>William StanisLaus wrote:
>>
>> >===== Original Message From ip-dvb@erg.abdn.ac.uk =====
>> >William StanisLaus wrote:
>> >>
>> >> Hi Fairhurst,
>> >>      Thanks for the drafts.. I am a new bee.. and have a basic question,
>> Does
>> >> these Encapsulations is to replace DSM-CC... in MPE ??.
>> >
>> >Yes - for those networks that are able to change. There is a large
>> >deployed
>> >base of MPE in broadcast TV service networks - it is unlikely these
>> >deployed
>> >networks will move away from MPE for the foreseeable future. So 
co-existance
>> >of the two schemes is important to me. New networks may choose.
>> >
>> >There are also a large number of IP-based networks that could take
>> >advantage of
>> >the new encapsulation by a change of driver software. Existing networks 
may
>> >upgrdae at some time. Again, new networks will have the chance to choose.
>> >
>>
>>  Is there any differentiator BITs in MPEG2-TS to figure out which MPE is 
USED
>> (i.e. DSM-CC, ULE or Simple Encapsulation). Atleast DSM-CC should be
>> interpreted seperately.
>>
>
>That's a signalling issue - currently using SI Tables.
>
>> >>      How do we do MAC filtering in DVB Receivers,  If MPE doesn't have
>> >> information about Destination MAC address ??
>> >>
>> >
>> >MPE has only a ***destination*** Mac address.
>> >
>>   Yeah i agree only Destination MAC present in case of DSM-CC. But i wonder
>> even Destination MAC is not present in Simple encapsulation and ULE. Is 
that
>> because, it is used only in Broadcast medium, I mean always Link Layer
>> Boardcast is done even for Network Unicast packets.
>>
>
>Not so, there's an address format that carries MAC addresses, you just don't
>need them when you are communicating to end hosts.
>

Can you suggest me some addressing formats which carries MAC addresses in 
Simple Encapsulation and ULE.

>> >It does not have a source address - which can present issues with LAN
>> bridges,
>> >IPv6 autoconfiguration, and some other scenarios.
>> >
>>
>>    Sorry i am not very sure about IPv6 :(, but for LAN Bridges, we need to
>> know only the Destination MAC address to forward the packet. Packet
>> forwarding/routing is done based on the destination address.
>>
>
>Not so. Learning bridges need both, but you could assume the source if
>you know the identity of the encapsualtor

Yeah I agree with Learning bridges which require Both Source and Destinatin 
MAC address for bridging.. rather updating its bridging route table. But for 
satellite networks is more like a static network and whenver a new Terminals 
comes into picture there is always an authentication and based on that we can 
configure the new comer MAC address in other existing Terminals. Most of the 
case, i see as Star Network in DVB-RCS, and now we are experimenting Mesh 
network.

>
>> >It doesn't carry a protocol Type field - which requires use of further
>> headers
>> >to support IPv6 efficiently and other protocols, such as arp.
>> >
>>
>>   protocol type field in Simple encap and ULE, it also resembles the 
LLC-SNAP
>> flag in DSM-CC, in which you can define your payload type. By default it is
>> IPv4, atleast that is in our configuration.
>
>Yes - so you must use LLC/SNAP - which is kind of strange.
>
>>   Also when you say Bridged Payload did you mean, tunneling Layer2 packet,
>> something like L2TP.
>>
>
>I mean connecting to ethernet LANS at both ends - i.e. were receiver is NOT
> an IP router.
>

   Do you mean receiver is always a bridge in this case for forwarding/routing 
and act as a host for Network management. Then is that packets gets discarded 
if the Payload type is different from 0x6558 i.e. bridged ethernet frame.

Thanks and Regards,
William.


>> >The requirements draft speaks of such issues - and will be re-issued in
>> >an
>> >updated format within  a week.
>> >
>> >More questions, comments welcome !
>> >
>> >Gorry
>>
>> Thanks for your clarifications...
>>
>> Best Regards,
>> William.
>>
>> >
>> >> Thanks in advance.
>> >>
>> >> Best Regards,
>> >> William.
>> >>
>> >> >===== Original Message From Dr G Fairhurst <gorry@erg.abdn.ac.uk> =====
>> >> >Two new "draft" Internet Drafts are now available for comments.
>> >> >
>> >> >Lightweight Encapsulation rev 01
>> >>
>>
>http://www.erg.abdn.ac.uk/users/gorry/ip-dvb/ids/draft-unisal-ipdvb-enc-01.tx
>> >> t
>> >> >
>> >> >Ultra Lightweight Encapsulation (ULE) rev 00
>> >>
>>
>http://www.erg.abdn.ac.uk/users/gorry/ip-dvb/ids/draft-fair-ipdvb-ule-00.txt
>> >> >
>> >> >
>> >> >
>> >> >These two drafts capture the comments the authors have received on the
>> >> encapsulation.
>> >> >In answering the comments from people concerning how to implement, we
>> >> discovered
>> >> >there were in fact two varients of the protocol.
>> >> >
>> >> >* One was oriented to a wide range of transport services and was based
>> >> >on PES
>> >> >  packets - it thus could be used in a very flexible way. It employs 
the
>> AFC
>> >> >  bits and an adaptation field for framing.
>> >> >
>> >> >*  The other approach (ULE)  is based solely on "raw" transport 
streams.
>> >> >   This does NOT use the adaptation field, and it can NOT be used for
>> >> >PES streams.
>> >> >   It uses a pointer signalled by the PUSI to synchronise framing.
>> >> >
>> >> >To get the best possible feedback, and to avoid confusion when we
>> >> >discuss these,
>> >> >the authors agreed to split the protocols into the two separate drafts.
>> >> >That's why
>> >> >you suddenly see two ID's in place of the one. So, let's debate the
>> >> pros/cons!
>> >> >
>> >> >We can go forward with one of these, both of these in a combined
>> >> encapsulation,
>> >> >or some other scheme - if there are comments, suggestions, please do 
say
>> >> soon!
>> >> >
>> >> >Gorry & Bernhard.


From owner-ip-dvb@erg.abdn.ac.uk Thu May 22 05:42:17 2003
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Date: Thu, 22 May 2003 00:37:00 -0400
From: William StanisLaus <williams77@mailandnews.com>
To: gorry <gorry@erg.abdn.ac.uk>, ip-dvb@erg.abdn.ac.uk
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Hi Fairhurst,
      Further, I have few more clarifications, Don't we support ARP in 
Satellite network with these encapsulation i.e. simple encapsulation and ULE. 
I can see in Section 4.1 Bridged Payload, you have talked about ARP Message. 
But i hope it is not clear, atleast to me.

Thanks in advance.

Best Regards,
William.


>===== Original Message From ip-dvb@erg.abdn.ac.uk =====
>>===== Original Message From gorry@erg.abdn.ac.uk =====
>>William StanisLaus wrote:
>>>
>>> >===== Original Message From ip-dvb@erg.abdn.ac.uk =====
>>> >William StanisLaus wrote:
>>> >>
>>> >> Hi Fairhurst,
>>> >>      Thanks for the drafts.. I am a new bee.. and have a basic 
question,
>>> Does
>>> >> these Encapsulations is to replace DSM-CC... in MPE ??.
>>> >
>>> >Yes - for those networks that are able to change. There is a large
>>> >deployed
>>> >base of MPE in broadcast TV service networks - it is unlikely these
>>> >deployed
>>> >networks will move away from MPE for the foreseeable future. So
>co-existance
>>> >of the two schemes is important to me. New networks may choose.
>>> >
>>> >There are also a large number of IP-based networks that could take
>>> >advantage of
>>> >the new encapsulation by a change of driver software. Existing networks
>may
>>> >upgrdae at some time. Again, new networks will have the chance to choose.
>>> >
>>>
>>>  Is there any differentiator BITs in MPEG2-TS to figure out which MPE is
>USED
>>> (i.e. DSM-CC, ULE or Simple Encapsulation). Atleast DSM-CC should be
>>> interpreted seperately.
>>>
>>
>>That's a signalling issue - currently using SI Tables.
>>
>>> >>      How do we do MAC filtering in DVB Receivers,  If MPE doesn't have
>>> >> information about Destination MAC address ??
>>> >>
>>> >
>>> >MPE has only a ***destination*** Mac address.
>>> >
>>>   Yeah i agree only Destination MAC present in case of DSM-CC. But i 
wonder
>>> even Destination MAC is not present in Simple encapsulation and ULE. Is
>that
>>> because, it is used only in Broadcast medium, I mean always Link Layer
>>> Boardcast is done even for Network Unicast packets.
>>>
>>
>>Not so, there's an address format that carries MAC addresses, you just don't
>>need them when you are communicating to end hosts.
>>
>
>Can you suggest me some addressing formats which carries MAC addresses in
>Simple Encapsulation and ULE.
>
>>> >It does not have a source address - which can present issues with LAN
>>> bridges,
>>> >IPv6 autoconfiguration, and some other scenarios.
>>> >
>>>
>>>    Sorry i am not very sure about IPv6 :(, but for LAN Bridges, we need to
>>> know only the Destination MAC address to forward the packet. Packet
>>> forwarding/routing is done based on the destination address.
>>>
>>
>>Not so. Learning bridges need both, but you could assume the source if
>>you know the identity of the encapsualtor
>
>Yeah I agree with Learning bridges which require Both Source and Destinatin
>MAC address for bridging.. rather updating its bridging route table. But for
>satellite networks is more like a static network and whenver a new Terminals
>comes into picture there is always an authentication and based on that we can
>configure the new comer MAC address in other existing Terminals. Most of the
>case, i see as Star Network in DVB-RCS, and now we are experimenting Mesh
>network.
>
>>
>>> >It doesn't carry a protocol Type field - which requires use of further
>>> headers
>>> >to support IPv6 efficiently and other protocols, such as arp.
>>> >
>>>
>>>   protocol type field in Simple encap and ULE, it also resembles the
>LLC-SNAP
>>> flag in DSM-CC, in which you can define your payload type. By default it 
is
>>> IPv4, atleast that is in our configuration.
>>
>>Yes - so you must use LLC/SNAP - which is kind of strange.
>>
>>>   Also when you say Bridged Payload did you mean, tunneling Layer2 packet,
>>> something like L2TP.
>>>
>>
>>I mean connecting to ethernet LANS at both ends - i.e. were receiver is NOT
>> an IP router.
>>
>
>   Do you mean receiver is always a bridge in this case for 
forwarding/routing
>and act as a host for Network management. Then is that packets gets discarded
>if the Payload type is different from 0x6558 i.e. bridged ethernet frame.
>
>Thanks and Regards,
>William.
>
>
>>> >The requirements draft speaks of such issues - and will be re-issued in
>>> >an
>>> >updated format within  a week.
>>> >
>>> >More questions, comments welcome !
>>> >
>>> >Gorry
>>>
>>> Thanks for your clarifications...
>>>
>>> Best Regards,
>>> William.
>>>
>>> >
>>> >> Thanks in advance.
>>> >>
>>> >> Best Regards,
>>> >> William.
>>> >>
>>> >> >===== Original Message From Dr G Fairhurst <gorry@erg.abdn.ac.uk> 
=====
>>> >> >Two new "draft" Internet Drafts are now available for comments.
>>> >> >
>>> >> >Lightweight Encapsulation rev 01
>>> >>
>>>
>>http://www.erg.abdn.ac.uk/users/gorry/ip-dvb/ids/draft-unisal-ipdvb-enc-01.t
x
>>> >> t
>>> >> >
>>> >> >Ultra Lightweight Encapsulation (ULE) rev 00
>>> >>
>>>
>>http://www.erg.abdn.ac.uk/users/gorry/ip-dvb/ids/draft-fair-ipdvb-ule-00.txt
>>> >> >
>>> >> >
>>> >> >
>>> >> >These two drafts capture the comments the authors have received on the
>>> >> encapsulation.
>>> >> >In answering the comments from people concerning how to implement, we
>>> >> discovered
>>> >> >there were in fact two varients of the protocol.
>>> >> >
>>> >> >* One was oriented to a wide range of transport services and was based
>>> >> >on PES
>>> >> >  packets - it thus could be used in a very flexible way. It employs
>the
>>> AFC
>>> >> >  bits and an adaptation field for framing.
>>> >> >
>>> >> >*  The other approach (ULE)  is based solely on "raw" transport
>streams.
>>> >> >   This does NOT use the adaptation field, and it can NOT be used for
>>> >> >PES streams.
>>> >> >   It uses a pointer signalled by the PUSI to synchronise framing.
>>> >> >
>>> >> >To get the best possible feedback, and to avoid confusion when we
>>> >> >discuss these,
>>> >> >the authors agreed to split the protocols into the two separate 
drafts.
>>> >> >That's why
>>> >> >you suddenly see two ID's in place of the one. So, let's debate the
>>> >> pros/cons!
>>> >> >
>>> >> >We can go forward with one of these, both of these in a combined
>>> >> encapsulation,
>>> >> >or some other scheme - if there are comments, suggestions, please do
>say
>>> >> soon!
>>> >> >
>>> >> >Gorry & Bernhard.


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Hi
Thank you for the new drafts, which from my point of view need this time
more (deep) study about a real comparison between MPE and the propose
method: not only the problem of overhead and adding lengh field and type
field. Let's go deeper and try together to work on problems of jitter/
lantency between the two methods ( MPE and the proposed), let's think
about improving the proposal with may simulation tools. We need also to
think about security



---------------------------------
Do You Yahoo!? -- Une adresse @yahoo.fr gratuite et en français ! Testez
le nouveau Yahoo! Mail



From owner-ip-dvb@erg.abdn.ac.uk Fri May 23 09:33:13 2003
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Thanks for your ideas, simulation and experimental implementation 
would be most welcome, and please do send any results to this list. This
will undoubtably improve our understanding. We're (UoA) planning to publish
some performance analysis for ULE, hopefully  within the next month,
other analysis / comments on performance would be great!

If published, these results would also be good references to quote.

The security area is certainly important too. Do you have specific
requirements that MPE does / does not satisfy? 

Gorry
University of Aberdeen

ghommam2002@yahoo.fr wrote:
> 
> Hi
> Thank you for the new drafts, which from my point of view need this time
> more (deep) study about a real comparison between MPE and the propose
> method: not only the problem of overhead and adding lengh field and type
> field. Let's go deeper and try together to work on problems of jitter/
> lantency between the two methods ( MPE and the proposed), let's think
> about improving the proposal with may simulation tools. We need also to
> think about security
> 
> ---------------------------------
> Do You Yahoo!? -- Une adresse @yahoo.fr gratuite et en français ! Testez
> le nouveau Yahoo! Mail

From owner-ip-dvb@erg.abdn.ac.uk Tue May 27 18:40:05 2003
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A copy for those not on the IETF announce list:

----

A New Internet-Draft is available from the on-line Internet-Drafts directories.


        Title           : Ultra Lightweight Encapsulation (ULE) for transmission
                          of IP datagrams over MPEG-2/DVB networks
        Author(s)       : G. Fairhurst, B. Collini-Nocker
        Filename        : draft-fair-ipdvb-ule-00.txt
        Pages           : 17
        Date            : 2003-5-20
        
This document contains an alternative Ultra Lightweight Encapsulation 
(ULE) mechanism for the transport of IP Datagrams directly over ISO 
MPEG-2 Transport Streams (TS) as TS private data. The MPEG-2 TS has 
been widely accepted not only for providing digital TV services, but 
also as a subnetwork technology for building IP networks.

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A copy for those not on the IETF announce list:

---

A New Internet-Draft is available from the on-line Internet-Drafts directories.


        Title           : Simple Encapsulation for transmission of IP
datagrams 
                          over MPEG-2/DVB networks
        Author(s)       : H. Clausen et al.
        Filename        : draft-clausen-ipdvb-enc-01.txt
        Pages           : 18
        Date            : 2003-5-20
        
This document contains the Simple Encapsulation, a simple and lean 
encapsulation mechanism for the transport of IP Datagrams over ISO 
MPEG-2 Transport Streams (TS). The MPEG-2 TS has been widely accepted 
not only for providing digital TV services, but also as a subnetwork 
technology for building IP networks. One example is the Digital Video 
Broadcast (DVB), specified by standards published by the European 
Telecommunications Standards Institute (ETSI).

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Subject: Re: "Flat Multicast Key Exchange (FMKE)"- Internet Draft
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Dear Laurence,

Sorry for the delay in my reply.  I read your proposed Internet Draft "Flat
Multicast Key Exchange (FMKE)" and I have the following comments:

1. Fundamental question:  I remember your presentation at the ESTEC workshop "IP
networking over satellites" few weeks ago.  I remember that you said that this
solution will be implemented in the link level (for example DVB-S link level).  That
is something is not clear in my mind yet, because your proposal is IPSEC based.  One
more point, your Internet draft does not mention satellites.  May be you can clarify
this.  By the way, ALCATEL ASP has a project with ESA on DVB-RCS security for
multicast and also University of Surrey and ALCATEL ASP have some documentation in
the GEOCAST project on how to modify DVB-RCS current security to cater for
multicast.

2.  As I understand that you will present your draft at the MSEC group at the IETF
meeting in Vienna.  Your proposal looks fairly similar to The Group Domain of
Interpretation (GDOI) and latest draft is draft-ietf-msec-gdoi-08.txt  (see:
http://www.ietf.org/internet-drafts/draft-ietf-msec-gdoi-08.txt), which is well
established and going to be an RFC soon.  Your work is duplicating GDOI and adding
phase 3 which does not exist in GDOI.  In fact, GDOI has flat key and LKH (tree
architecture) distribution mechanisms.  Can you clarify the differences between FMKE
and GDOI.

3. In section 8 (security consideration), you should state the remaining or
potential problems with your protocol.  One example is Denial of Service (DoS)
attacks, where you should state how your protocol and your security server can cope
with thousands of forged messages coming from false IP addresses. One common
practice is to use stateless COOKIES in order to minimize the memory and CPU burden
on the security server which is experiencing the DoS attack (for more details see:
http://www.ietf.org/internet-drafts/draft-ietf-ipsec-ikev2-07.txt).

Please consider these as constructive comments and I hope they will improve your
draft.

Regards
Haitham



Laurence.Duquerroy@space.alcatel.fr wrote:

> Hello,
>
> In  the context of the SatIP6 IST project, Alcatel Space studies a multicast
> security scheme optimised to protect large multicast groups. Such a scheme is
> designed for IP over Satellite, Wifi or DVB systems; it is a security solution
> for the satellite segment. An implementation over DVB-S/RCS is planned in the
> SatIP6 demonstrator.
> We have presented this security solution (called SatIPSec) during the ESA
> workshop at ESTEC, 13-14 May on "IP networking over satellite".
>
> We have started to write an Internet Draft detailing our key exchange protocol
> (called "Flat Multicast Key Exchange (FMKE)"), and we think that it could be
> submitted to the "IP over DVB " group, as IP over DVB systems are targeted
> systems. We would be ready to present it to the next IETF meeting (in Vienna).
> As it is very security-oriented, it will probably also be submitted to an IETF
> security group (i.e. MSEC (Multicast Security) WG).
>
> You will find in attachment a draft of the ID. Your comments, opinion,  and
> feedback on it are welcome.
> (See attached file: draft-duquer-fmke-00.doc)
>
> This solution is very flexible. It is able to configure any security dataplane
> at layer 2 or 3 ( IPv4/6 IPSec, L2 security dataplanes...).
> It is based on similar principles to the ones of the protocols currently defined
> in the IETF MSEC group. It uses also similar messages (based on the ISAKMP
> standard protocol). However it implements additional mechanisms and features in
> order to provide a security solution optimized for satellite systems:
>
>      -  It is defined to be low ressource consuming in bandwidth
>      -  It provides a reliable key distribution ( unlike the GDOI and GSAKMP
> protocols)
>      -  It can be used in one-to-many and many-to-many scenarios, and is
> scalable in these scenarios (MIKEY cannot be used in many-to-many scenarios in
> large groups)
>      -  It provides a multicast re-keying (mandatory in large groups) (unlike
> MIKEY)
>      - etc
>
> We hope that you will find interest in it, and thank you in advance for your
> comments.
>
> Best regards,
>
> Laurence Duquerroy
>
> ALCATEL SPACE
> RT/ST
> Research Department / Advanced Telecom Satellite Systems
> Tel : 33 (0)5-34-35-63-06  /  Fax : 33 (0)5-34-35-55-60
> E-Mail : laurence.duquerroy@space.alcatel.fr
>
>   ------------------------------------------------------------------------
>                                   Name: draft-duquer-fmke-00.doc
>    draft-duquer-fmke-00.doc       Type: WINWORD File (application/msword)
>                               Encoding: base64
>                            Description: Mac Word 3.0

--
Dr. Haitham S. Cruickshank

Senior Research Fellow in Communications
Centre for Communication Systems Research (CCSR)
School of Electronics, Computing and Mathematics
University of Surrey
Guildford, Surrey GU2 7XH, UK

Tel: +44 1483 686007 (indirect 689844)
Fax: +44 1483 686011
e-mail: H.Cruickshank@surrey.ac.uk
http://www.ee.surrey.ac.uk/Personal/H.Cruickshank/



