Re: [straw] draft-ietf-straw-b2bua-taxonomy: decomposed gateway model and media plane b2bua types
"Schwarz, Albrecht (Albrecht)" <[email protected]> Wed, 19 Jun 2013 11:19:54 +0000
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--===============3191208350462668981== Content-Language: en-US Content-Type: multipart/alternative; boundary="_000_786615F3A85DF44AA2A76164A71FE1AC068C36FR711WXCHMBA03zeu_" --_000_786615F3A85DF44AA2A76164A71FE1AC068C36FR711WXCHMBA03zeu_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hello Christer, Hadriel, I don't want to delay the publication. Don't see any principle issue, too. In case of a future revision of this RFC, then it might be beneficial to tr= y to add a term definition for B2BUA (because the whole taxonomy is actuall= y based on this term). 2nd I suppose a difference between B2BUA vs PROXY, hence might be worth as = well to point out differences. Personally, I could see following resolution proposal (based on ITU terms): Background: the subject as such was studied in Y.1251 (http://www.itu.int/r= ec/dologin_pub.asp?lang=3De&id=3DT-REC-Y.1251-200208-I!!PDF-E&type=3Ditems = ). Possible definition of term "B2BUA": B2BUA: provides a service interworking function (according clause 3.2/ITU-= T Y.1251) with following limitations, 1. network planes: only IP control and IP user plane; 2. protocol stack: same protocol at each side of the service interwor= king function. NOTE 1: hence, a B2BUA is not a proxy. Proxy (derived from ITU-T Y.2902): A system authorized to work on behalf of= another system including responding to protocol requests. NOTE 1: hence, a proxy does not provide any interworking function (neither = service interworking nor network interworking). NOTE 2: a proxy as network element is an intermediary node in the sense of = identical protocol stacks at incoming and outgoing interfaces of the proxy. SIP B2BUA: provides a B2BUA function with for the SIP, i.e., a service in= terworking function (according clause 3.2/ITU-T Y.1251) in the IP control p= lane. NOTE: the service interworking function may include as well the interworkin= g of the protocol stack for SIP transport (e.g., SIP-over-UDP/IP4 to SIP-ov= er-SCTP/IPv6 interworking). ... and then subsequent, derived term definitions for media plane B2BUA back-to-back IP host etc Just some thoughts, Albrecht -----Original Message----- From: Christer Holmberg [mailto:[email protected]] Sent: Sonntag, 16. Juni 2013 11:04 To: Schwarz, Albrecht (Albrecht); Hadriel Kaplan; <[email protected]> Subject: VS: [straw] draft-ietf-straw-b2bua-taxonomy: decomposed gateway mo= del and media plane b2bua types (As co-chair) Hi Albrecht, I do appreciate the fact that you have taken a look at the draft, and studi= ed its applicability from a SG16 perspective. In the conclusion part, you ask whether there is a need to provide feedback= to STRAW. Keep in mind that the WGLC for the draft has finished, and that publication= has been requested by the chairs. Now, that does not prevent us from taking the draft back to the WG, and do = changes, but in order for that to happen there normally has to be some issu= es that need to be changed/addressed in order to publish the document as an= RFC. Regards, Christer -----Alkuper=E4inen viesti----- L=E4hett=E4j=E4: [email protected]<mailto:[email protected]> [mai= lto:[email protected]] Puolesta Schwarz, Albrecht (Albrecht) L=E4hetetty: 16. kes=E4kuuta 2013 8:13 Vastaanottaja: Hadriel Kaplan; <[email protected]<mailto:[email protected]>> Aihe: [straw] draft-ietf-straw-b2bua-taxonomy: decomposed gateway model and= media plane b2bua types Hi Hadriel, fyi, some high-level comments to the taxonomy draft from perspective of dec= omposed SBCs (according H.248 model) http://ftp3.itu.int/av-arch/avc-site/2= 013-2016/1306_Osl/AVD-4391.zip Regards, Albrecht _______________________________________________ straw mailing list [email protected]<mailto:[email protected]> https://www.ietf.org/mailman/listinfo/straw --_000_786615F3A85DF44AA2A76164A71FE1AC068C36FR711WXCHMBA03zeu_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <html xmlns:v=3D"urn:schemas-microsoft-com:vml" xmlns:o=3D"urn:schemas-micr= osoft-com:office:office" xmlns:w=3D"urn:schemas-microsoft-com:office:word" = xmlns:m=3D"http://schemas.microsoft.com/office/2004/12/omml" xmlns=3D"http:= //www.w3.org/TR/REC-html40"> <head> <meta http-equiv=3D"Content-Type" content=3D"text/html; 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</span></span></span><![endif]><span lang=3D"EN-GB" style=3D"font-size:10.0= pt;font-family:"Times New Roman","serif"">network plane= s: only IP control and IP user plane;<o:p></o:p></span></p> <p class=3D"MsoNormalCxSpMiddle" style=3D"mso-margin-top-alt:6.0pt;margin-r= ight:0cm;margin-bottom:0cm;margin-left:36.0pt;margin-bottom:.0001pt;text-in= dent:-18.0pt;mso-list:l0 level1 lfo1;punctuation-wrap:simple;text-autospace= :none"> <![if !supportLists]><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-fa= mily:"Times New Roman","serif""><span style=3D"mso-list= :Ignore">2.<span style=3D"font:7.0pt "Times New Roman""> &nb= sp; </span></span></span><![endif]><span lang=3D"EN-GB" style=3D"font-size:10.0= pt;font-family:"Times New Roman","serif"">protocol stac= k: same protocol at each side of the service interworking function.<o:p></o= :p></span></p> <p class=3D"MsoNormal" style=3D"margin-top:6.0pt;punctuation-wrap:simple;te= xt-autospace:none"> <span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-family:"Times New = Roman","serif"">NOTE 1: hence, a B2BUA is <b>not</b> a proxy.<o:p></o:p></span></p> <p class=3D"MsoNormal" style=3D"margin-top:6.0pt;punctuation-wrap:simple;te= xt-autospace:none"> <span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-family:"Times New = Roman","serif""><o:p> </o:p></span></p> <p class=3D"MsoNormal" style=3D"margin-top:6.0pt;punctuation-wrap:simple;te= xt-autospace:none"> <b><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-family:"Times N= ew Roman","serif"">Proxy</span></b><span lang=3D"EN-GB" styl= e=3D"font-size:10.0pt;font-family:"Times New Roman","serif&q= uot;"> (derived from ITU-T <b>Y.2902</b>): A system authorized to work on behalf of another system inc= luding responding to protocol requests. <o:p></o:p></span></p> <p class=3D"MsoNormal" style=3D"margin-top:6.0pt;punctuation-wrap:simple;te= xt-autospace:none"> <span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-family:"Times New = Roman","serif"">NOTE 1: hence, a proxy does <b>not</b> provide any <i>interworking function</i> (neither service interw= orking nor network interworking).<o:p></o:p></span></p> <p class=3D"MsoNormal" style=3D"margin-top:6.0pt;punctuation-wrap:simple;te= xt-autospace:none"> <span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-family:"Times New = Roman","serif"">NOTE 2: a proxy as network element is an <b>intermediary</b> node in the sense of identical protocol stacks at incom= ing and outgoing interfaces of the proxy.<o:p></o:p></span></p> <p class=3D"MsoNormal" style=3D"margin-top:6.0pt;punctuation-wrap:simple;te= xt-autospace:none"> <span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-family:"Times New = Roman","serif""><o:p> </o:p></span></p> <p class=3D"MsoNormal" style=3D"margin-top:6.0pt;punctuation-wrap:simple;te= xt-autospace:none"> <b><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-family:"Times N= ew Roman","serif"">SIP B2BUA:</span></b><span lang=3D"EN-GB"= style=3D"font-size:10.0pt;font-family:"Times New Roman","se= rif""> provides a <b><i>B2BUA</i></b> <i>function</i> with for the SIP, i.e., a <i>service in= terworking function</i> (according clause 3.2/ITU-T <b>Y.1251</b>) in the IP control plane.<o:p></o:p></span></p> <p class=3D"MsoNormal" style=3D"mso-margin-top-alt:6.0pt;margin-right:0cm;m= argin-bottom:0cm;margin-left:42.55pt;margin-bottom:.0001pt;text-indent:-42.= 55pt;punctuation-wrap:simple;text-autospace:none"> <span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-family:"Times New = Roman","serif"">NOTE: the service interworking function may = include as well the interworking of the protocol stack for SIP transport (e= .g., SIP-over-UDP/IP4 to SIP-over-SCTP/IPv6 interworking).<o:p></o:p></span= ></p> <p class=3D"MsoPlainText"><span lang=3D"EN-US"><o:p> </o:p></span></p> <p class=3D"MsoPlainText"><span lang=3D"EN-US">… and then subsequent,= derived term definitions for<o:p></o:p></span></p> <p class=3D"MsoPlainText"><span lang=3D"EN-US">media plane B2BUA<o:p></o:p>= </span></p> <p class=3D"MsoPlainText"><span lang=3D"EN-US">back-to-back IP host <o:p></= o:p></span></p> <p class=3D"MsoPlainText"><span lang=3D"EN-US">etc<o:p></o:p></span></p> <p class=3D"MsoPlainText"><span lang=3D"EN-US"><o:p> </o:p></span></p> <p class=3D"MsoPlainText"><span lang=3D"EN-US">Just some thoughts,<o:p></o:= p></span></p> <p class=3D"MsoPlainText"><span lang=3D"EN-US">Albrecht<o:p></o:p></span></= p> <p class=3D"MsoPlainText"><span lang=3D"EN-US"><o:p> </o:p></span></p> <p class=3D"MsoPlainText"><span lang=3D"EN-US"><o:p> </o:p></span></p> <p class=3D"MsoPlainText"><span lang=3D"EN-US">-----Original Message-----<b= r> From: Christer Holmberg [mailto:[email protected]] <br> Sent: Sonntag, 16. Juni 2013 11:04<br> To: Schwarz, Albrecht (Albrecht); Hadriel Kaplan; <[email protected]><br= > Subject: VS: [straw] draft-ietf-straw-b2bua-taxonomy: decomposed gateway mo= del and media plane b2bua types</span><o:p></o:p></p> <p class=3D"MsoPlainText"><o:p> </o:p></p> <p class=3D"MsoPlainText">(As co-chair)<o:p></o:p></p> <p class=3D"MsoPlainText"><o:p> </o:p></p> <p class=3D"MsoPlainText">Hi Albrecht,<o:p></o:p></p> <p class=3D"MsoPlainText"><o:p> </o:p></p> <p class=3D"MsoPlainText">I do appreciate the fact that you have taken a lo= ok at the draft, and studied its applicability from a SG16 perspective.<o:p= ></o:p></p> <p class=3D"MsoPlainText"><o:p> </o:p></p> <p class=3D"MsoPlainText">In the conclusion part, you ask whether there is = a need to provide feedback to STRAW.<o:p></o:p></p> <p class=3D"MsoPlainText"><o:p> </o:p></p> <p class=3D"MsoPlainText">Keep in mind that the WGLC for the draft has fini= shed, and that publication has been requested by the chairs.<o:p></o:p></p> <p class=3D"MsoPlainText"><o:p> </o:p></p> <p class=3D"MsoPlainText">Now, that does not prevent us from taking the dra= ft back to the WG, and do changes, but in order for that to happen there no= rmally has to be some issues that need to be changed/addressed in order to = publish the document as an RFC.<o:p></o:p></p> <p class=3D"MsoPlainText"><o:p> </o:p></p> <p class=3D"MsoPlainText">Regards,<o:p></o:p></p> <p class=3D"MsoPlainText"><o:p> </o:p></p> <p class=3D"MsoPlainText">Christer<o:p></o:p></p> <p class=3D"MsoPlainText"><o:p> </o:p></p> <p class=3D"MsoPlainText"><o:p> </o:p></p> <p class=3D"MsoPlainText"><o:p> </o:p></p> <p class=3D"MsoPlainText">-----Alkuper=E4inen viesti-----<o:p></o:p></p> <p class=3D"MsoPlainText">L=E4hett=E4j=E4: <a href=3D"mailto:straw-bounces@= ietf.org"><span style=3D"color:windowtext;text-decoration:none">straw-bounc= [email protected]</span></a> [<a href=3D"mailto:[email protected]"><span sty= le=3D"color:windowtext;text-decoration:none">mailto:[email protected]<= /span></a>] Puolesta Schwarz, Albrecht (Albrecht)<o:p></o:p></p> <p class=3D"MsoPlainText">L=E4hetetty: 16. kes=E4kuuta 2013 8:13<o:p></o:p>= </p> <p class=3D"MsoPlainText">Vastaanottaja: Hadriel Kaplan; <<a href=3D"mai= lto:[email protected]"><span style=3D"color:windowtext;text-decoration:none">s= [email protected]</span></a>><o:p></o:p></p> <p class=3D"MsoPlainText">Aihe: [straw] draft-ietf-straw-b2bua-taxonomy: de= composed gateway model and media plane b2bua types<o:p></o:p></p> <p class=3D"MsoPlainText"><o:p> </o:p></p> <p class=3D"MsoPlainText">Hi Hadriel,<o:p></o:p></p> <p class=3D"MsoPlainText">fyi, some high-level comments to the taxonomy dra= ft from perspective of decomposed SBCs (according H.248 model) <a href=3D"http://ftp3.itu.int/av-arch/avc-site/2013-2016/1306_Osl/AVD-4391= .zip"><span style=3D"color:windowtext;text-decoration:none">http://ftp3.itu= .int/av-arch/avc-site/2013-2016/1306_Osl/AVD-4391.zip</span></a> <o:p></o:p></p> <p class=3D"MsoPlainText"><o:p> </o:p></p> <p class=3D"MsoPlainText">Regards,<o:p></o:p></p> <p class=3D"MsoPlainText">Albrecht<o:p></o:p></p> <p class=3D"MsoPlainText">_______________________________________________<o= :p></o:p></p> <p class=3D"MsoPlainText">straw mailing list<o:p></o:p></p> <p class=3D"MsoPlainText"><a href=3D"mailto:[email protected]"><span style=3D"= color:windowtext;text-decoration:none">[email protected]</span></a><o:p></o:p>= </p> <p class=3D"MsoPlainText"><a href=3D"https://www.ietf.org/mailman/listinfo/= straw"><span style=3D"color:windowtext;text-decoration:none">https://www.ie= tf.org/mailman/listinfo/straw</span></a><o:p></o:p></p> </div> </body> </html> --_000_786615F3A85DF44AA2A76164A71FE1AC068C36FR711WXCHMBA03zeu_-- --===============3191208350462668981== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ Megaco mailing list [email protected] https://www.ietf.org/mailman/listinfo/megaco --===============3191208350462668981==--