答复: RE:_[p2p-sip]_A_New_Internet-draft_is_available

[bessler at FTW.at (Sandford Bessler)]

Juwei Shi schrieb:
>
> I?ll explain the motivation of the hierarchical P2P-SIP architecture.
>
>  
>
> The precondition of applying the hierarchical approach is that the 
> SIP-over-P2P structure is adopted. We have presented the benefits of 
> that two layer approach in our draft.
>
>  
>
> Various P2P overlays have already existed such as Chord, Pastry and 
> etc. We can?t roughly tie up a specific P2P overlay as the peer 
> locating service for SIP but exclude other overlays. Only one overlay 
> is inflexible and can?t satisfy requirements of all the peers. For 
> example, the requirement of a mobile peer in MANET differs from that 
> of a powerful host in Internet.
>

> Thus we believe that heterogeneous P2P overlays will exist, and when 
> we use them as the underlying peer locating service for SIP we can 
> only inter-connect them to retain the connectivity feature of SIP.
>
I completely agree with the view of heterogeneous P2P overlays and 
decentral domain administration for security or  resource management  
(e.g. storage). We have even tried to further work out the elegant idea 
of federated DHTs according to the paper of H.Balakrishnan, S.Shenker 
and M.Walfish, Peering Peer to Peer Providers, however the routing 
amounts to that of a mesh network and needs advertising mechanisms 
similar to the BGP protocol. The hierarchical solution really seem to 
reduce the complexity.

Best Regards,
Sandford
>
>  
>
> Comments are welcomed!
>
>  
>
>  
>
> Thanks
>
> Juwei
>
>  
>
>  
>
>  
>
>  
>
> WHEN YOU CAN MANIPULATE NODES OF MULTIPLE OVERLAYS, WHY NOT MANIPULATE 
> THEM TO USE ONLY ONE OVERLAY?
>
> THANK YOU.
>
> --KY
>
> PLEASE QUALITY CONTROL LIKE BUILDING A LEXUS.
>
> */Juwei Shi <jwshi at bupt.edu.cn>/* wrote:
>
>  
>
> Yes, I agree with Seaward, hierarchically inter-connecting 
> heterogeneous overlays is more practical than the mesh based approach. 
>
>  
>
>  
>
>  
>
>     Interworking among heterogeneous hierarchical is more efficient
>     than do it meshy, you can not expect a flat huge mesh over whole
>     world can work reliably, the reason why mesh is used is the
>     absence of a acceptable standard.
>
>
>     Thanks.
>
>     Seaward
>
>      
>
>          
>
>         ------------------------------------------------------------------------
>
>         *From:* p2p-sip-bounces at cs.columbia.edu
>         [mailto:p2p-sip-bounces at cs.columbia.edu] *On Behalf Of *K.Yamamoto
>         *Sent:* Thursday, August 24, 2006 2:16 AM
>         *To:* Juwei Shi; p2p-sip at cs.columbia.edu
>         *Subject:* Re: ??0?2???: [p2p-sip] A New Internet-draft is
>         available
>
>         WHEN NUMEROUS MULTI-OVERLAID NODES ARE INTERCONNECTED, "the
>         interworking among heterogenous overlays" IS GENERALLY MESSY
>         NOT HIERACHICAL.
>
>         THANK YOU.
>
>          
>
>         --KY
>
>         PLEASE QUALITY
>
>          CONTROL LIKE BUILDING A LEXUS.
>
>         */Juwei Shi <jwshi at bupt.edu.cn>/* wrote:
>
>         The NAT issues will be discussed in our future drafts.
>
>         This draft focuses on the interworking among heterogenous
>         overlays and the SIP-over-P2P architecture in one single
>         overlay is proposed by E. Shim etc.
>
>         http://www.p2psip.org/drafts/draft-shim-sipping-p2p-arch-00.txt
>
>         Thanks
>
>         Juwei
>
>         ------------------------------------------------------------------------
>
>         *????????oo:* K.Yamamoto [mailto:kyara543 at yahoo.com]
>         *???????????????????:* 2006?1??8???23????? 12:21
>         *????????oo:* Juwei Shi; p2p-sip at cs.columbia.edu
>         *????????:* Re: [p2p-sip] A New Internet-draft is available
>
>         THE DOCUMENT IS GORGEOUS BUT NEED RENAME AS "A MESHY
>         ARCHITECTURE AMONG MULTIPLE P2P-SIP NETWORKS".
>
>         FOMULA "Node-ID=Hash(Node-IP)" HAS PROBLEM WITH MULTIPLE NODES BEHIND A NAT.
>
>          
>
>          THERE IS LITTLE ABOUT P2P OR SIP, FOR ONE SINGLE OVERLAY.
>
>          
>
>          THANK YOU.
>
>          
>
>          --KY
>
>          PLEASE QUALITY CONTROL LIKE BUILDING A LEXUS.
>
>
>
>
>         */Juwei Shi <jwshi at bupt.edu.cn>/* wrote:
>
>         Hello, all
>
>         We have
>
>          submitted a new Internet-draft entitled a???A Hierarchical P2P-SIP Architecturea???. This draft focuses
>
>          on the SIP-over-P2P architecture and interworking of heterogeneous overlay networks. 
>
>          
>
>         This document is available in the Internet-drafts archive now:
>
>         http://www3.ietf.org/internet-drafts/draft-shi-p2psip-hier-arch-00..txt
>         <http://www3.ietf.org/internet-drafts/draft-shi-p2psip-hier-arch-00.txt>
>
>         Comments are welcomed!
>
>         Thanks
>
>         Juwei
>
>         Juwei Shi
>
>         Wireless Technology Innovation Institute (WTI)
>
>         Beijing Univ. of Posts and Telecommunications (BUPT)
>
>         Tel: [phone] ext. 312
>
>         Email: jwshi at bupt.edu.cn
>
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>
>          
>
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-- 
Dr. Sandford Bessler
Key Researcher,
ftw. - Telecommunications Research Centre Vienna - www.ftw.at
bessler at ftw.at, Tel: [phone]