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[Feel free to add any comments, suggestion, or questions regarding this data set]

From:  Libo Song
Subject: Re: [CRAWDAD-USERS] Question about the timestamps in the trace.
Date: January 14, 2008 9:30:14 PM EST
To:   CRAWDAD-USERS@LISTSERV.DARTMOUTH.EDU
Reply-To:   CRAWDAD-USERS@LISTSERV.DARTMOUTH.EDU

Hi Hari.S.

The timestamp has already taken the 30 minutes into account.
So, the example was the node associated with the AP, but immediately
disconnected from it.

Does the above also answer your 2nd question?

Libo

>HARI SUBRAMONI wrote:
>Hi,
>
>In the readme file it's mentioned that an "OFF" event is generated 30 minutes after the node went off the network. So is this 30 minute delay taken into account when creating the trace file for the node?
>
>For example, if we have the following trace...
>
>1085750203  AcadBldg29AP1
>1085750203  OFF
>
>Does it mean that the node went off the network 30 minutes before the time '1085750203'?
>
>Is there any way to figure out the first / last contact times a node had with an access point from the traces?
>
>Thx,
>Hari.S.

From : 	David Kotz <dfk@CS.DARTMOUTH.EDU>
Reply-To : 	CRAWDAD users <CRAWDAD-USERS@LISTSERV.DARTMOUTH.EDU>
Sent : 	Thursday, February 8, 2007 12:32 PM
To : 	CRAWDAD-USERS@LISTSERV.DARTMOUTH.EDU
Subject : 	Re: [CRAWDAD-USERS] Syslog trace and tool added

>We have added a new syslog trace (collected from 2005 to 2006) to
>dartmouth/campus data set. We also added a syslog_parser tool to the
>CRAWDAD archive as follows:
>
>- dartmouth/campus (v. 2007-02-08) (Updated) A new syslog trace (collected from
2005-09-01 to 2006-10-04) has been added.
>- tools/process/syslog/syslog_parser (v. 2006-11-01) A tool for parsing Cisco
and Aruba 802.11 syslog traces


Thanks Jihwang.  Folks, this is a pretty big release - Dartmouth made a major
expansion of its network in 2004 (replacing 550 Cisco APs with 1300 Aruba APs)
so this trace should have a much finer granularity if you're into looking at
roaming patterns.  And, there are a lot more MAC addresses.  And, I think, it's
a pretty 'clean' data set, for a whole year and the whole campus.

Have fun!

dave

Date: Tue, 2 Oct 2007 09:14:23 +0100 From: Tristan Henderson <tristan@CS.ST-ANDREWS.AC.UK> Reply-To: CRAWDAD users <CRAWDAD-USERS@LISTSERV.DARTMOUTH.EDU> To: <CRAWDAD-USERS@LISTSERV.DARTMOUTH.EDU> Subject: Re: [CRAWDAD-USERS] How to Pick out the VoIP users from dataset?

At 10:42 on 02 Oct 2007, Yu X.G - Email said: > I have downloaded the dataset from the link "dartmouth/campus/movement/01_04 (v. 2005-03-08)".Now i want to pick VoIP users(PDA Users) out from the dataset. Could you give me something guides about how to do it?

See: http://crawdad.cs.dartmouth.edu/download/dartmouth/campus/tcpdump/fall03/README.voip http://crawdad.cs.dartmouth.edu/download/dartmouth/campus/tcpdump/fall03/MAC_OS_list

Or at least I think those are the right URLs, I can't actually access the crawdad webserver at the moment!

Cheers, Tristan