---------- Forwarded message ---------- From: El Hadi Cherkaoui <elhadi.cherka...@gmail.com> Date: Wed, 21 Dec 2011 13:03:18 +0100 Subject: [ns] strenge behivor in NS2.29 + NIST mobility model To: ns-users@isi.edu
Dear ns users, I am working on the NIST mobility model for heterogeneous network. In my tcl script I have set one wifi AP , 1 wimax BS and enable UMTS communications for the whole coverage area. The AP and BS are set in the seme position (1000,1000) I set the position of my terminal (containing 3 interfaces:wifi+umts+wimax) on (800,1000) and moves straight toward (2500,1000) My Wifi AP coverage is 50 meters ie from (950 to 1050)m and my Wimax coverage is 1km (0 to 2000)m I expect that with a defined Handover algorithm receive packets: >From 800 to 950: wimax >From 950 to 1050: wifi >From 1050 to 2000: wimax >From 2000 to 2500: umts but I figure it out that from 1000 to 1050 wifi packets are dropped by the AP and not flow is received in this region .... why ? second scenario, I start the movement of mobil from x=1001 to 2500 and it receives perfectly wifi packet in the zone [1000-1050]. So my question is : why when only the terminal crosses the center of the AP it doesn't receive any wifi packets ? thanx in adv for your reply !! H.
