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[Q]about loss module in SRM



Hello, ns-users
 
Can anybody tell me about the detail of loss module in SRM??
 
set loss_module [new SRMErrorModel]  ;# create error module
$loss_module drop-packet 2 10 1    ;# pkt_type, drop_cycle, drop_offset
$loss_module drop-target [$ns set nullAgent_] ;# set target for dropped packets
$ns at 2.5 "$ns lossmodel $loss_module $n(1) $n(4)"
The example above shows the loss module in SRM....
Could you tell me about drop_cycle??
What does it exactly mean??
Does it represent time?? second? ms?
 
Thanks in advance