Hi! Which UMTS implementation are you using?
As far as I know, the way to _model_ movement in EURANE is to generate channel traces which models a radio channel when a user moves. As far as ns-2 is concerned the user does not move at all, but because the radio channel changes as if the user was moving it will still affect performance. However, because the user is "stationary", it will never come into range of the wifi-access point and thus never perform a handover, I guess. The reason for using such a trace to model the radio channel is speed. You could introduce online calculations of the radio environment and easily implement movement, but it is complex to design and implement and extends the simulation time. Chose your poison. Best regards, Mats Folke Carlos Rodrigues wrote: > Without movement, yes. > > UMTS traces do not have the same format as the other ns traces. For > example the packet with UID 10, which has a size of 500 bytes, is sent > by a wired node but is received on the UMTS network. The UMTS network > divides the packets is small subpackets of size 40 bytes (53, 54, …). > > > + 9.8 3 4 cbr 500 ------- 0 1.0.0.0 0.0.2.0 4 10 > … > > r 9.854019 0 1 AM_Data 40 -------- 0 1.0.0.0 0.0.2.0 0 10 53 > > r 9.854019 0 1 AM_Data 40 -------- 0 1.0.0.0 0.0.2.0 0 10 54 > > r 9.854021 0 1 AM_Data 40 -------- 0 1.0.0.0 0.0.2.0 0 10 55 > > r 9.854027 0 1 AM_Data 40 -------- 0 1.0.0.0 0.0.2.0 0 10 56 > > > Now our doubt is if we can introduce some movement in mobile node > (UMTS interface), and this interface will/can receive traffic... > > Carlos Rodrigues > > > ----- Original Message ----- > From: Kiran K Chauhan > To: Carlos Rodrigues > Sent: Wednesday, March 25, 2009 3:25 PM > Subject: Re: [ns] UMTS-WIFI Handover using NIST module > > > > Hi, > > Are you able to transfer data packets without movement ? > > > Kiran > > > On Wed, Mar 25, 2009 at 3:19 AM, Carlos Rodrigues <c...@iol.pt> wrote: > > > Hi, > I´m working in a project about interoperability between technologies > (WIFI,WIMAX,UMTS) and deploying some scripts to test this scenarios in > NS (Network Simulator). I'm using ns2.29 with the patch of seamless > and secure mobility for testing an example script that is provided in > this patch, but I can't introduce some movement in mobile node (UMTS > interface), and this interface never receive traffic. > > All help or support will be very helpful. > > Best Regards, > Carlos Rodrigues > > > ________________________________________________________________________________ > Precisa de crédito até €15.000? Crédito Pessoal Capital Mais. > Pode pedir uma proposta on-line em > http://www.iol.pt/correio/rodape.php?dst=0901052 -- Mats Folke, M.Sc., Lic.Eng. Research Engineer Ericsson AB Office: +46 10 7171385 Ericsson Research Fax: +46 920 99621 P.O. Box 920 Mobile: +46 76 1271385 SE-971 28 Luleå Sweden
