Re: [Mobopts] Same MPA server for 2 access networks
Carlos Rodrigues <cmjr@iol.pt> Mon, 20 April 2009 22:27 UTC
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Date: Mon, 20 Apr 2009 23:28:43 +0100
From: Carlos Rodrigues <cmjr@iol.pt>
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Cc: mobopts@irtf.org
Subject: Re: [Mobopts] Same MPA server for 2 access networks
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Yeah, that helped. This MPA server will be more a "AAA server", correct? And this server needs to be first point first contact point for users within the IMS (before P-CSCF), or can be placed in the IMS core (like a AS)? Carlos Rodrigues ----- Original Message ----- From: "Yoshihiro Ohba" <yohba@tari.toshiba.com> To: "Carlos Rodrigues" <cmjr@iol.pt> Cc: <adutta@research.telcordia.com>; <mobopts@irtf.org> Sent: Monday, April 20, 2009 10:42 PM Subject: Re: [Mobopts] Same MPA server for 2 access networks > On Mon, Apr 20, 2009 at 07:08:06PM +0100, Carlos Rodrigues wrote: >> My question is more about a interworking scenario, more >> specifically inter-technology / intra-domain handover. >> Like a 3G-Wifi interworking scenario... we need have these agents >> in each access network but we can have a centralized MPA server, >> right? > > That's right. For example, Authentication Agent and Configuration > Agent placed in each access network can communicate with a centralized > server such as a AAA server for authenticating MNs as well as > allocating IP addresses. You may refer such a centralized server to > as an "MPA server". > > Hope this helps, > Yoshihiro Ohba > > >> >> Carlos Rodrigues >> >> ----- Original Message ----- >> From: "Ashutosh Dutta" <adutta@research.telcordia.com> >> To: "Carlos Rodrigues" <cmjr@iol.pt> >> Cc: <mobopts@irtf.org> >> Sent: Monday, April 20, 2009 6:52 PM >> Subject: Re: [Mobopts] Same MPA server for 2 access networks >> >> >>> Carlos, >>> As I just replied to your personal email to me, you can >>> have an AA (Authentication Agent) and CA (Configuration Agent) >>> that are two logical components of an MPA server in the core of >>> the IMS network. These two functions of course can coexist on the >>> same physical box if that is what you are asking for. >>> >>> Thanks >>> Ashutosh >>> >>> Carlos Rodrigues wrote: >>>> These agents need to stay with access network but I can have a >>>> centralized MPA server in the edge of IMS core, no? >>>> >>>> It is like DNS... we don't have several DNS servers to access to >>>> the Internet. It is done relay... >>>> >>>> Cheers, >>>> Carlos Rodrigues (Computer Science BSc student) >>>> ESTG - IPL >>>> Leiria, Portugal >>>> >>>> ----- Original Message ----- >>>> From: "Ashutosh Dutta" <adutta@research.telcordia.com> >>>> To: "Carlos Rodrigues" <cmjr@iol.pt> >>>> Cc: <mobopts@irtf.org> >>>> Sent: Monday, April 06, 2009 7:55 PM >>>> Subject: Re: [Mobopts] Same MPA server for 2 access networks >>>> >>>> >>>>> Carlos, >>>>> Let me repeat some of what I have said earlier to you. >>>>> MPA server has several logical components, such as >>>>> Authentication Agent, Configuration Agent, Buffering Agent, >>>>> Tunneling agent. Some of these components could be aggregated >>>>> for each access network, such as Authentication Agent, and >>>>> Configuration Agent. However, part of Configuration Agent needs >>>>> to stay with each access network (e.g., DHCP relay). Buffering >>>>> Agent and Tunneling Agent usually stay at the edges with each >>>>> access network. >>>>> >>>>> Thus, it is a design decision as to how you want to split the >>>>> functionality of the MPA server. >>>>> >>>>> Thanks >>>>> Ashutosh >>>>> >>>>> >>>>> Carlos Rodrigues wrote: >>>>>> Hi! >>>>>> >>>>>> I have question about the number of MPA servers necessary in a >>>>>> interworking scenario. >>>>>> If I have a scenario with 2 access networks (with different >>>>>> technologies), will need two CA, two AA and two tunneling >>>>>> agents and buffering agents if perform handover from both ways >>>>>> (A to B and B to A), right? >>>>>> >>>>>> First, I'm trying understand why (can give some tips?); >>>>>> Second, it's not possible aggregate these 2 MPA server in a >>>>>> single entity? In a intra domain scenario makes sense. >>>>>> >>>>>> All help or support will be very helpful. >>>>>> >>>>>> Cheers, >>>>>> Carlos Rodrigues (Computer Science BSc student) >>>>>> ESTG - IPL >>>>>> Leiria, Portugal >>>>>> > >>>>>> ________________________________________________________________________________ Descubra as Solu醇M醇wes de Financiamento >>>>>> Cetelem. >>>>>> Saiba mais em: http://www.iol.pt/correio/rodape.php?dst=0901272 >>>>>> _______________________________________________ >>>>>> Mobopts mailing list >>>>>> Mobopts@irtf.org >>>>>> http://www.irtf.org/mailman/listinfo/mobopts >>>>> >>>> > >>>> ________________________________________________________________________________ ANTECIPE A DEVOLU遵ャ遵ィO DO SEU IRS e receba j醇@ o seu >>>> dinheiro... >>>> I.R.Yes! da Capital Mais >>>> http://www.iol.pt/correio/rodape.php?dst=0803281 >>>> _______________________________________________ >>>> Mobopts mailing list >>>> Mobopts@irtf.org >>>> http://www.irtf.org/mailman/listinfo/mobopts >>> >> >> ________________________________________________________________________________ >> Financiamentos at醇P ???50.000. Simule j醇@! >> Saiba mais em: http://www.iol.pt/correio/rodape.php?dst=0901273 >> _______________________________________________ >> Mobopts mailing list >> Mobopts@irtf.org >> http://www.irtf.org/mailman/listinfo/mobopts >> >> ________________________________________________________________________________ Com o Cetelem realize todos os seus projectos! Saiba mais em: http://www.iol.pt/correio/rodape.php?dst=0901271
- [Mobopts] Same MPA server for 2 access networks Carlos Rodrigues
- Re: [Mobopts] Same MPA server for 2 access networ… Ashutosh Dutta
- Re: [Mobopts] Same MPA server for 2 access networ… Carlos Rodrigues
- Re: [Mobopts] Same MPA server for 2 access networ… Ashutosh Dutta
- Re: [Mobopts] Same MPA server for 2 access networ… Carlos Rodrigues
- Re: [Mobopts] Same MPA server for 2 access networ… Yoshihiro Ohba
- Re: [Mobopts] Same MPA server for 2 access networ… Carlos Rodrigues
- Re: [Mobopts] Same MPA server for 2 access networ… Yoshihiro Ohba