RE: Re: The requiremnts and proposalsforM2PA/M3UA/SCTPExtension from China Mobile

Hi chenxu,

can u tell your aim of the STP(IPSTP) in case of a IP network?
do u wnat it because of operational issues? instead of creating associations between each element in the network, create assocations to the IPSTPs in each site and create interconnecting associations among IPSTPs?
or what else? is it there because of the existence both legacy and IP SS7 networks?

BR..

-----Original Message-----
From: ext chenxu [mailto:[email protected]] 
Sent: 26 July 2007 11:34
To: [email protected]
Cc: zhaoyuyi; zhanghao; sigtran
Subject: Re: Re: [Sigtran] The requiremnts and proposalsforM2PA/M3UA/SCTPExtension from China Mobile

Hi,Brian F. G. Bidulock,

   Thank you for your comments!

   As you refered, M3UA is designed for SGP-ASP and IPSP-IPSP applications.But it's such a  welcome protocol,so 3GPP defines it to transport core network signaling,such as BICC,MAP and CAP.And for China Mobile and other big carriers,IPSP-IPSP application isn't enough.we need  relay points(IPSTP) in SS7 over IP network. M3UA is a good choice for IPSTP-IPSEP interface of IP signaling network,why not extend its application only because of its initial design idea? 
   
>   If they can't you likely are expecting M3UA to do something that it 
>was not intended to do.  M3UA was not intended to replace an SS7 
>network with an IP network.  It was intended to provide transparent 
>interworking between an existing traditional SS7 network and Application Servers in the IP domain.
>Primarily for backhaul of SS7 signalling protocols from a Signalling 
>Gateway, possibley collocated with a Media Gateway, to a Media Gateway 
>Controller.  See the framework document RFC 2719.


  As we know,IP Signaling networks exsited only have one IPSTP vender,and without the IPSTP-IPSTP interworking scene. That's the 4 IPSTP venders(include TEKELEC and CISCO) told us.Maybe the performance of one IPSTP is better that one STP since the rapid development of signaling technology and IP technology.Sothat's the difference between the traditional signaling network(use STPs) and IP signaling network(use IPSTPs) .

>  All of the telcommunications carriers that I used to work for 
>required STPs from multiple vendors.  In fact, after the 9-hour AT&T 
>SS7 network outage, it was required that STPs in an STP pair be from 
>different vendors.  I doubt that STPs from one vendor (IP or not) is 
>the norm today.  So you are not alone here.


 I'm  looking forward to your support cause I believe that both of us hope the international specification is perfect and authoritative.


Best Regards

Chen Xu
China Mobile
[email protected]