Hi Elena, Thanks for the I-D which is an attempt to provide the basis for computing the cost benefits of a hierarchical Vs distributed mobility architecture. A few questions:
1. I am not sure I understand Fig 3 which is portraying the distributed model. You have multiple PGWs in this architecture as opposed to Fig 2. How does that make the architecture distributed? 2. The major cost obviously lies in backhauling traffic from the eNB/BS' to the PGW. Does your model account for this? Additionally the cost varies depending on whether the SGW and PGW are in different countries, between operator boundaries etc. Not sure if you consider these variables as well. 3. In the figures, does the backbone refer to the network consisting of the SGW, MME, eNB/BS'? 4. Have you mapped the equations with real-world traffic costs in the TI network to see how close they are? I do think that a formal way to derive the cost benefits of centralized vs distributed mobility architectures is very useful and this is a good start. -Raj On 3/7/12 3:59 AM, "ext Demaria Elena" <[email protected]> wrote: >Hi all, >this is to inform you that we have submitted a new draft related to DMM >topic. >http://www.ietf.org/internet-drafts/draft-demaria-dmm-dimensioning-conside >rations-00.txt > One of the main questions posed during recent discussions on > distributed mobility architectures is if the distributed architecture > can have advantages in terms of costs with respect to a centralized > one. > > This draft describes a general method to calculate the costs of the > centralized and distributed scenarios. Even if a simplified model > has been used, some information can be earned. Each operator can use > this model and his own costs to discover the optimal architecture > based on traffic observed in the network. > >Comments welcome. > >Elena > > > >-----Messaggio originale----- >Da: [email protected] [mailto:[email protected]] >Per conto di [email protected] >Inviato: venerdì 2 marzo 2012 11:38 >A: [email protected] >Oggetto: I-D Action: draft-demaria-dmm-dimensioning-considerations-00.txt > > >A New Internet-Draft is available from the on-line Internet-Drafts >directories. > > Title : Dimensioning considerations for distributed >mobility architecture > Author(s) : Elena Demaria > Loris Marchetti > Filename : >draft-demaria-dmm-dimensioning-considerations-00.txt > Pages : 10 > Date : 2012-03-02 > > One of the main questions posed during recent discussions on > distributed mobility architectures is if the distributed architecture > can have advantages in terms of costs with respect to a centralized > one. > > This draft describes a general method to calculate the costs of the > centralized and distributed scenarios. Even if a simplified model > has been used, some information can be earned. Each operator can use > this model and his own costs to discover the optimal architecture > based on traffic observed in the network. > > >A URL for this Internet-Draft is: >http://www.ietf.org/internet-drafts/draft-demaria-dmm-dimensioning-conside >rations-00.txt > >Internet-Drafts are also available by anonymous FTP at: >ftp://ftp.ietf.org/internet-drafts/ > >This Internet-Draft can be retrieved at: >ftp://ftp.ietf.org/internet-drafts/draft-demaria-dmm-dimensioning-consider >ations-00.txt > >_______________________________________________ >I-D-Announce mailing list >[email protected] >https://www.ietf.org/mailman/listinfo/i-d-announce >Internet-Draft directories: http://www.ietf.org/shadow.html or >ftp://ftp.ietf.org/ietf/1shadow-sites.txt > >Questo messaggio e i suoi allegati sono indirizzati esclusivamente alle >persone indicate. La diffusione, copia o qualsiasi altra azione derivante >dalla conoscenza di queste informazioni sono rigorosamente vietate. >Qualora abbiate ricevuto questo documento per errore siete cortesemente >pregati di darne immediata comunicazione al mittente e di provvedere alla >sua distruzione, Grazie. > >This e-mail and any attachments is confidential and may contain >privileged information intended for the addressee(s) only. Dissemination, >copying, printing or use by anybody else is unauthorised. If you are not >the intended recipient, please delete this message and any attachments >and advise the sender by return e-mail, Thanks. > >_______________________________________________ >dmm mailing list >[email protected] >https://www.ietf.org/mailman/listinfo/dmm _______________________________________________ dmm mailing list [email protected] https://www.ietf.org/mailman/listinfo/dmm
