[EMAIL PROTECTED] wrote:
Hello,
Did you get the answer to your reply? I'm asking because I am also experiencing the same problem with the throughput.
Please help me if you have a solution.
Also please tell me the version you are using. Mine is ns 2.28.
Thanks a lot,
Kamil
Sandeep-9 wrote:
Hi
In the below code whatever Mac/802_11 parameters I set are not taking
effect. For instance eventhough I set _dataRate 11mbps, throughput is
coming around 400kbps, which is the default rate for udp. If I change
_dataRate, basicRate_ or PLCPDataRate_ , there is absolutely no effect.
Please if anyone can help, because I require them in my work.
Thanks in advance,
regards,
Sandeep.
1 set val(chan) Channel/WirelessChannel ;# channel type
2 set val(prop) Propagation/TwoRayGround ;#
radio-propagation model
3 set val(netif) Phy/WirelessPhy ;# network
interface type
4 set val(mac) Mac/802_11 ;# MAC type
5 set val(ifq) Queue/DropTail/PriQueue ;# interface queue
type
6 set val(ll) LL ;# link layer type
7 set val(ant) Antenna/OmniAntenna ;# antenna model
8 set val(ifqlen) 50 ;# max packet in ifq
9 set val(nn) 2 ;# number of
mobilenodes
10 set val(rp) DSDV ;# routing protocol
11 set val(x) 800
12 set val(y) 800
13
14 Phy/WirelessPhy set bandwidth_ 11Mb
15
16 Mac/802_11 set SlotTime_ 0.000020 ;# 20us
17 Mac/802_11 set SIFS_ 0.000010 ;# 10us
18 Mac/802_11 set PreambleLength_ 144 ;# 144 bit
19 Mac/802_11 set PLCPHeaderLength_ 48 ;# 48 bits
20 Mac/802_11 set PLCPDataRate_ 1.0 ;# 1Mbps
21 Mac/802_11 set dataRate_ 11.0 ;# 11Mbps
22 Mac/802_11 set basicRate_ 1.0 ;# 1Mbps
23
24 set ns [new Simulator]
25 set tr [open trace.tr w]
26 $ns trace-all $tr
27 set na [open trace.nam w]
28 $ns namtrace-all-wireless $na $val(x) $val(y)
29 set chan1 [new $val(chan)]
30 set topo [new Topography]
31 $topo load_flatgrid 500 500
32 create-god 2
33
34 proc finish {} {
35 global ns tr na
36 $ns flush-trace
37 $ns nam-end-wireless [$ns now]
38 close $tr
39 close $na
40 exec nam trace.nam &
41 exit 0;
42 }
43
44 $ns node-config -adhocRouting $val(rp)\
45 -llType $val(ll) \
46 -macType $val(mac) \
47 -antType $val(ant) \
48 -propType $val(prop) \
49 -phyType $val(netif) \
50 -channel $chan1 \
51 -topoInstance $topo \
52 -agentTrace ON \
53 -routerTrace ON \
54 -macTrace ON \
55 -movementTrace OFF\
56 -ifqType $val(ifq) \
57 -ifqLen $val(ifqlen)
58
59 for {set i 0} {$i < 2} {incr i} {
60 set node_($i) [$ns node]
61 $node_($i) random-motion 0
62 }
63
64 $node_(0) set X_ 0
65 $node_(0) set Y_ 0
66 $node_(0) set Z_ 0
67 $node_(1) set X_ 10
68 $node_(1) set Y_ 0
69 $node_(1) set Z_ 0
70
71 $node_(0) color green
72 $node_(1) color green
73
74 set udp [new Agent/UDP]
75 set des [new Agent/Null]
76 $ns attach-agent $node_(0) $udp
77 $ns attach-agent $node_(1) $des
78 $ns connect $udp $des
79
80 set udapp [new Application/Traffic/CBR]
81 $udapp attach-agent $udp
82 $udapp set fid_ 1
83 $udapp set packetSize_ 400
84
85 $ns at 1.0 "$udapp start"
86 $ns at 30.0 "$udapp stop"
87 $ns at 30.0 "$ns halt"
88 ns at 30.0 "finish
89 $ns run"
Quoted from:
http://www.nabble.com/why-does-the-code-below-doesn%27t-work-as-expected-tf2188094.html#a6053421
Hi Kamil,
My problem is solved, there was an error in through calculation,
instead of calculating recieve events at destination node, I was
calculating recieve at RTR agent in source node itself. Hence I was
calculating sending rate not throughput, there was no actual
transmission because I didn't set phy parameters in script. I sending
those parameters. As I have already simulated it, u ask me if u have any
other doubt. The parameters below are for 11g.
Antenna/OmniAntenna set Gt_ 1
Antenna/OmniAntenna set Gr_ 1
Phy/WirelessPhy set L_ 1.0
Phy/WirelessPhy set freq_ 2.472e9
Phy/WirelessPhy set Pt_ 0.031622777
Phy/WirelessPhy set CPThresh_ 10.0
Phy/WirelessPhy set CSThresh_ 5.011872e-12
Phy/WirelessPhy set RxThresh_ 5.82587e-09 ;#Receive power
threshold calculated under TwoRay ground model
Phy/WirelessPhy set Rb_ 2*1e6
Mac/802_11 set RTSThreshold_ 3000 ;#To suppress RTS/CTS Packets
increase the rts threshold
