how to calculate handoff latency in mipv6 environment
 

i have installed ns 2.33 and added the patch mobiwan for supprting mobile ipv6. i ran some tcl scripts , and below is the trace file generated. can somebody help me to calculate the handoff latency, and if someone has awk or perl script to do so, please send me .
tcl file https://docs.google.com/leaf?id=0BxX...ODUzNDkw&hl=en
out.tr https://docs.google.com/leaf?id=0BxX...OTFlYzhl&hl=en