I'm working with 802.11e using cooperative MAC and cross layer optimization
between PHY, MAC and TCP. Firstly I implement 802.11e with coop MAC but I
found that the packet delay is high don't know why please inform me what
the problem is and also find below the part of Coop MAC added in my TCL
file
$ns at 0.0 "$node_(0) setdest 100.0 100.0 20.0"
$ns at 0.0 "$node_(1) setdest 200.0 200.0 20.0"
#$ns at 0.0 "$node_(2) setdest 300.0 200.0 20.0"
#$ns at 0.0 "$node_(3) setdest 400.0 300.0 20.0"
#$ns at 0.0 "$node_(4) setdest 500.0 400.0 20.0"
#$ns at 0.0 "$node_(5) setdest 100.0 280.0 20.0"
#$ns at 0.0 "$node_(6) setdest 550.0 200.0 20.0"
#$ns at 0.0 "$node_(7) setdest 600.0 300.0 20.0"
#$ns at 1.5 "$node_(5) setdest 100.0 400.0 5.0"
##$ns at 1.0 "$node_(3) setdest 400.0 400.0 5.0"
#$ns at 2.5 "$node_(5) setdest 500.0 300.0 5.0"
#$ns at 3.5 "$node_(5) setdest 500.0 100.0 5.0"
##$ns at 4.0 "$node_(3) setdest 600.0 400.0 5.0"
##$ns at 3.5 "$node_(5) setdest 300.0 100.0 5.0"
#$ns at 7.0 "$node_(6) setdest 550.0 550.0 5.0"
#$ns at 8.0 "$node_(6) setdest 100.0 400.0 5.0"
#$ns at 0.4 "$node_(0) label \"source\""
#$ns at 0.4 "$node_(5) label \"destination\""
##$ns at 0.4 "$node_(3) label \"destination\""
$ns at 1.9 "$node_(1) label \"helper\""
##$ns at 2.4 "$node_(3) label \" \""
$ns at 3.3 "$node_(1) label \" \""
#$ns at 3.4 "$node_(2) label \"helper\""
#$ns at 4.8 "$node_(5) label \"\""
#$ns at 4.5 "$node_(3) label \"destination\""
#$ns at 6.2 "$node_(6) label \"destination\""
#$ns at 6.8 "$node_(2) label \"\""
#$ns at 7.0 "$node_(3) label \"helper\""
#$ns at 7.9 "$node_(3) label \"\""
#$ns at 8.0 "$node_(4) label \"helper\""
#$ns at 9.0 "$node_(4) label \"\""
#$ns at 9.1 "$node_(1) label \"helper\""
In addition I need your advice for the cross layer is this code is correct
for the cross layer between TCP and MAC
if (strcmp(argv[1], "access-mac") == 0) {
mac_pt_ = (Mac802_11*)TclObject::lookup(argv[2]);
if (mac_pt_ == 0)
return TCL_ERROR;
return TCL_OK;
waiting for ur urgent reply
Best Regards
--
Eng.Radwa Osman
Teacher Assistant
Basic & Applied Science Department
Arab Academy for science and Technology and maritime transport
PO box 1029 Abo Kir, Alexandria, Egypt
