Dear ns users, I am carrying out a layer 2 performance analyses of CBR and FTP traffics in mobile WiMAX for my masters Thesis using the NIST WiMAX module with NS-2.31 on Linux Fedora Core 5. I want to measure the throughput, delay, jitter and packet loss when a mobile node moves within a base station and from one base station to another (handover) by configuring different speeds, modulations, Frequency bandwidths and cyclic prefixes.
I have some results which I have analysed with trace graph but I am having problem with the handover aspect. I noticed in NAM, the trace file and from Trace Graph that the mobile node communicated with only base station 1 throughout the simulation. I did not see packets being received by base station 2. The manual says the lgd factor should be above 1 to trigger scanning but it is already set at 1.8. I increased the scanning trigger time by setting it to 2 but still could not achieve handover. I tried to manually create another channel and attach the mobile node to base station 2 with the "$ns at <time>" command, but when the mobile node sent ARP requests to base station 2, it kept being dropped. What am I doing wrong? Best Regards William ------------------------------------------------------------ This mail sent through IMP: http://webmail.brad.ac.uk To report misuse from this email address forward the message and full headers to [EMAIL PROTECTED] ------------------------------------------------------------
