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Re: [ns] How to calculate the RTT in edge router?

To: =?gb2312?B?0OzX5ruq?= <zhxu@zjuem.zju.edu.cn>
Subject: Re: [ns] How to calculate the RTT in edge router?
From: Benyuan Liu <benyuan@cs.umass.edu>
Date: Thu, 12 Apr 2001 12:17:04 -0400 (EDT)
cc: <ns-users@ISI.EDU>
In-Reply-To: <001001c0c352$36d77b80$37160d0a@zju.edu.cn>
Sender: owner-ns-users@ISI.EDU

Hi,


 If you can snoop the TCP data and ack sequence number passing the edge
router, then you can use the same algorithm to estimate the RTT between
the edge router and the dest.




Ben

---------------------------------------------------------

On Thu, 12 Apr 2001, [gb2312] ï¿½ï¿½ï¿½æ»ª wrote:

> Hi,
> I want to implement functionality that requires dynamically
> calculating RTT times for a TCP flow passing through edge router for Differentiated Services.
> I cannot make use of the TCP Agent's RTT data, since the node in question can be an
> intermediate node in a data path, without a TCP Agent associated with it.  I
> want to calculate the RTT between that node and the destination, ignoring
> any previous nodes in the data path.
>
> So, I'm not sure how to solve the problem of calculating a TCP flow's RTT
> between a given node and the flow's destination.  If anyone has any
> suggestions, the help would be appreciated greatly.
>
> Thanks,
> Xu zuhua
>
>
>
>

References:
- [ns] How to calculate the RTT in edge router?
  - From: =?gb2312?B?0OzX5ruq?= <zhxu@cmsce.zju.edu.cn>

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