I am working with ns2 with eurena (HSDPA) and Evalvid (MPEG4 transmission). I have set up all the tools and modified the ns2 source code, such as steps this link : http://mailman.isi.edu/pipermail/ns-users/2008-February/062290.html. then I have followed this step : http://mailman.isi.edu/pipermail/ns-users/2005-May/049765.html, I have been doing successfully for the simulation, output as trace-all (out.tr), and sd of the configuration : $ UDP0 set_filename sd but the output for rd in sink is not available. $UDP0 set_filename rd. I see the output of the data packet trace-all. Data packet is transmitted to the UE is not a video, but UM. Output for this example .tr (trace-all) : + 0.120127 1 2 UM 40 -------- 0 7.0 2.0 0 9 249 r 0.120128 0 1 UM 40 -------- 1 8.0 3.0 0 16 0 + 0.120128 1 3 UM 40 -------- 1 8.0 3.0 0 16 0 r 0.120128 0 1 UM 40 -------- 1 8.0 3.0 0 16 1 note : node 0 is BS node 1 is RNC node 2 is sink1 or ue1 node 3 is sink2 or ue2 please give me a solution to this problem ! I have to complete the my thesis within 1 month ahead !