[ns] default values of mac 802_11 thresholds
Hi Can anybody tell me what are the default vales of various threshold like RTSthresh, CS thresh etc in ns-2? Also what is size of hello packets in AODV? Kindly correct me if i dont put the value of RxThresh and CSThresh then default range for transmission is 250m and Carrier sense range is 550m. Neeraj Gupta
[ns] maintaining the throughput between two nodes
Hi I have simulated a scenarion where in the data rate is 2Mbps. Ihave udp packet as 1024 bytes and 2048 bytes respectively for two scenarios and have kept the cbr packet as 1024 bytes. On running the script for two scenarion and analyzing the trace file i found that packet length denoted by Il in both cases ia around 1024 bytes. Is it beacues of cbr packet size. Also if i want to keep the throughput between two nodes as 500Kbps, 1000Kbps, 1500Kbps and finally as 2000Kbps what parameters should i look for? Neeraj Gupta
[ns] cbr flow synchronization
Hi I have not been able to understand what does we mean by synchronization of cbr flow and why does it happen. Any Comments. Neeraj Gupta
[ns] find the idle time of node
Hi In mac802.11 one of the state the system can enter is idle state. We have a three variable rx_state_ , tx_state and nav_. Can anybody tell how can we calculate the the idle time before the station enters either in transmit or receive mode. Neeraj Neeraj Gupta
[ns] Invitation to connect on LinkedIn
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[ns] plotting xgraph with various shapes
Hi I am using ns-allin-one 2.30 i need to plot the multiple graph (using xgraph)with different shapes. kindly help Neeraj
[ns] tx range and adding neighbors
Hi all can anyone provide me the input for adding the neighbors falling in transmission range of the node. i have been searching for long but no relipes. Neeraj Gupta Assistant Professor HOD, CSE IT Department Hindu College of Engineering Sonepat
[ns] how to trace user defined variable
Hi all i have defined one function calculate_availabe_bandwidth in mac802_11.cc file the resultant is stored in vaiable (abe). This function is not called anywhere in mac802_11.cc. I want to call the function after every 5 seconds and trace the value of abe. can you tell how can i perform the said operation. i tried to bind both the function and variable but i am in fix how to call the function so that i can trace the value of abe. Neeraj Gupta Assistant Professor HOD, CSE IT Department Hindu College of Engineering Sonepat
[ns] finding the value of the backoff
Hi all I need to find the backoff value of the node in order to calculate the available bandwidth. The question at any instant how can i get the value of the backoff timer Neeraj Gupta Assistant Professor HOD, CSE IT Department Hindu College of Engineering Sonepat
[ns] export the values
Hi all I am trying to simulate a scenario where by i have already known the one hop neighbor of the node. Noe i finding it difficult to get the values of nav in the node.cc (source node) corresponding to neighbor list. Also i need to make sure that packet source node has send has been acknowledged or nor . Kindly help i am stuck kindly help. Neeraj Gupta Assistant Professor HOD, CSE IT Department Hindu College of Engineering Sonepat
[ns] record the nav
hi all how is it possible for an neighboring node of a source to know that the rts/cts and data/ack packet sent by source is successful. also where can i record the nav along with the sucees or failure of transmiited packet. basically i need to record the above facts to calculate the available bandwidth. if the session is success then recoed the nav or otherwise change the nav value by tdata+difs time. kindly help as it is urgent for my thesis work. thanxs Neeraj Gupta Assistant Professor HOD, CSE IT Department Hindu College of Engineering Sonepat
[ns] read the lo g file in mac802_11
hi all in mac802_11 layer we maintain the mac_log where are this log file and how can i access these files. Neeraj Gupta Assistant Professor HOD, CSE IT Department Hindu College of Engineering Sonepat
[ns] how to add neighbors
Hi all i am simulating in which i want to add neighbors for a particular mobile node. since i am not using the energy model the function of adaptive fidelity in mac 802_11.cc will not work. how can i use the add neighbor function defined in node.cc here. also kind let me know how can i include th energy model in the script. i gone through ns-2 documentation. but i not sure which energy model i need to include since it's default value is none. kind treat this mail as urgent as my future work depends on the above problem. Neeraj Gupta Assistant Professor HOD, CSE IT Department Hindu College of Engineering Sonepat
[ns] mobile nodes
hi all i just made certain changes in mac802_11.cc file to find out the neighbors of nodes. right now whenever i run the script it is showing me all the current nodes and their neighboring nodes a simulation time passes on. i like to find it out for particular node how can i do it. also b default the netif_ - nodes()- energymodel() is returning 0. and the netif_-node()- adaptivefidelity() is giving segemntation fault. what can be possible reasons. i need your help ugently. Neeraj Gupta Assistant Professor HOD, CSE IT Department Hindu College of Engineering Sonepat
[ns] qos in manets using bandwidth as parameter
hi all i am doing research work in qos in manets using bandwidth as parameter. do i have have to work in link layer or network layer. does i need to be protocol specific. actually i have gone through certain papers ut i totla confussed kindly help me. Neeraj Gupta Assistant Professor HOD, CSE IT Department Hindu College of Engineering Sonepat
[ns] explanation of the line
hi all any anybody explain what the following is doing netif_-node()-energy_model()-add_neighbor(src); the above line is in 802_11.cc file. where it is storing the neighbors.where is energy_model() function in the ns-2.30 Neeraj Gupta Assistant Professor HOD, CSE IT Department Hindu College of Engineering Sonepat
[ns] neighbor list
Hi all i have written a small function to find out all the neighbors of a node. The problem where should i place this function and from where this function is to be called. Initially i placed in mac802_11.cc and called it from recvCTS function but on running the script the i got segmentation fault. the function is compiled successfully. Neeraj Gupta Assistant Professor HOD, CSE IT Department Hindu College of Engineering Sonepat
[ns] using the variables
hi there is a variable nsaddr_t index in the aodv.h i suppose this soters the index of the node during its creation time. how can i use the variable in mac802_11.cc Neeraj Gupta Assistant Professor HOD, CSE IT Department Hindu College of Engineering Sonepat
[ns] index of the node
t is continuation to mu earler mail regarding the finding out the list of neighbors in wireless scenario. there is afunction in the god.h ISneighbor(int i, int j) to find out the same. My probl;em is how can we find the index number (i) of the current node in question in c++ code.what file i need to include in order to find the same Neeraj Gupta Assistant Professor HOD, CSE IT Department Hindu College of Engineering Sonepat
[ns] error in the code
hi all i have modified the aodv.cc to print the routing table. during make i recevied the following errors aodv/aodv.cc:445: error: stray \302 in program aodv/aodv.cc:445: error: stray \240 in program aodv/aodv.cc:446: error: stray \302 in program aodv/aodv.cc:446: error: stray \240 in program make: *** [aodv/aodv.o] Error 1 can you tell me what does the above error statement means Neeraj Gupta Assistant Professor HOD, CSE IT Department Hindu College of Engineering Sonepat
[ns] error in the code
hi all
i am using the aodv protocol in my scenario. i made certain updation to print
the routing table as foolows
Add following code to aodv.h after void rt_down(aodv_rt_entry *rt);
void rt_print(nsaddr_t node_id);
Add following code to aodv.cc after void AODV:: rt_down (aodv_rt_entry *rt)
{ ... }
void AODV::rt_print(nsaddr_t node_id) {
FILE *out_file;
char nowfile[50] = rtable.txt;
out_file = fopen(nowfile, a);
aodv_rt_entry *rt;
fprintf(out_file, =);
for (rt=rtable.head(); rt; rt = rt-rt_lin.le_next) {
fprintf(out_file, NODE: %i\t %.4lf\t%i\t%i\t%i\t%i\t%.4lf\t%d\n,
node_id, CURRENT_TIME, rt-rt_dst, rt-rt_nexthop, rt-rt_hops,
rt-rt_seqno, rt-rt_expire, rt-rt_flags);
}
fclose(out_file);
}
The function (rt_print) can be used anywhere in AODV. For example, I am using
the function when original source node receives route reply message (RREP).
void AODV:: recvReply(Packet *p) {
...
if (ih-daddr() == index) {
rt_print(index) ;
...
}
after ame i got following error rt-rt_lin.le_next not a valid field. can
anybody help me to solve the problem. i am using the ns-2.30
Neeraj Gupta
Assistant Professor
HOD, CSE IT Department
Hindu College of Engineering
Sonepat
[ns] address to mobile nodes
Hello all how can i assign the address like 90.X.X.X to the mobile nodes. Neeraj Gupta Assistant Professor HOD, CSE IT Department Hindu College of Engineering Sonepat
[ns] certain questions
i am just trying to simulate your paper Available Bandwidth in IEEE802.11b Network Based on Non-Intrusive Measurements there are certain question i need to ask. 1.It is written To the nodes which have send the several packets during a single period, the NAV fields is the sum of the the NAV values to all successful packets sent by this node the question is whether the current node in question is transmitting the packets to the one particular node or it is sending the packets of itself to destination and other packets (as router) to all other nodes also? 2.the duration field in question is of the RTS packet or of the data packet 3. the flag value who's value can be true or false, why we have taken the value of NAV as Tdata if the transmission is unsuccessful. 4. how have you find the neighboring nodes in ns-2 and what routing protocol are you taking to find whether the transmission is successful or not. It will niece of you if you can kindly sent me the code or explanation to above question at the earliest. Since i am taking your paper as a base for my research and need to sent in the progress report to mu guide. Neeraj Gupta India Neeraj Gupta Assistant Professor HOD, CSE IT Department Hindu College of Engineering Sonepat
[ns] where to create routing buffer
hi all i just went through the one of papers for calculating the available bandwidth . the question i encountered in the paper is where is routing buffer located for maintaining the table. is it in the node.cc ot it is the routing protocol we are using in the simulation e.g. AODV . Also how can i calculate the neighbors of the node and know which of them is transmitting or not. Neeraj Gupta Assistant Professor HOD, CSE IT Department Hindu College of Engineering Sonepat
[ns] carrier sense
hi all it's true the node uses the carrier sense before sending the data. as per my understanding the NAV for the nodes in the carrier sense rage is updated. Nodes uses this nav to determine the time after which the it is permited to send the data. my promblem is to use the entries in nav for my work.how can i access the nav table. Neeraj Gupta Assistant Professor HOD, CSE IT Department Hindu College of Engineering Sonepat
[ns] IPaddress in node
Hello I am simulating adhoc wireless scenario i just want to know how can we give the IP addresses to the nodes and then during the simulation if one node is transmitting the how can other nodes can store in the IP address and nav value in its internal table. Neeraj Gupta Assistant Professor HOD, CSE IT Department Hindu College of Engineering Sonepat
[ns] accessing vaiable of c++
hi all how can i access the variable in c++ in tcl script. Also if change the code in c++ to print the value of variable where that value will be printed. Neeraj Gupta Assistant Professor HOD, CSE IT Department Hindu College of Engineering Sonepat
[ns] access NAv
hi all how can i access the NAV of the nodes in 802.11 and the calculate the idle time (or busy time). Neeraj Gupta Assistant Professor HOD, CSE IT Department Hindu College of Engineering Sonepat
[ns] ip layer and NAV
where can i modify the code of ip layer to claculate the bandwidth and acess the NAV. Neeraj Neeraj Gupta Assistant Professor HOD, CSE IT Department Hindu College of Engineering Sonepat
[ns] how to access NAV of nodes
hi all how can we access the NAv of the nodes in the end-to-end path. Also can we access the Duration/ID field in MAC frame header. any help will be of great use Neeraj Gupta Assistant Professor HOD, CSE IT Department Hindu College of Engineering Sonepat
[ns] only cbrgen.tcl
hi all i appreciate your help for the setdest. my next problem is if if only give the cbrgen.tcl generated file and not the file generated by setdest. the simulation is running . what it is giving to me and what are the coordinates of the nodes. and suppose i want to generate the scenario file by setdest with speed as zero or i mean iw ant tio generate the static topology of 50 nodes will it work or should i go my different method. Neeraj Gupta Assistant Professor HOD, CSE IT Department Hindu College of Engineering Sonepat
[ns] setdest not working
hi all i am trying to genetrate the senario file using setdest but it is giving the error that asset(speed !=0) not meet. can you tell me the problem Neeraj Gupta Assistant Professor HOD, CSE IT Department Hindu College of Engineering Sonepat
[ns] parameters in 802.11b
hi all how can i get different values like sifs, cwnd and others in ns-2 through otcl code . what are the available tools for inding available bandiwth in ns-2 foe wireless scenario. Neeraj Gupta Assistant Professor HOD, CSE IT Department Hindu College of Engineering Sonepat
[ns] packet dispersion method
hello i came along a method which talks about the packet dispersion method whic is basically double packet probe method for measuring the bandwidth or available capacity of network. my problem is there any code available which i can include in ns-2 for experimentation method. another thing how many methods are available for estimating the available method. Neeraj Gupta Assistant Professor HOD, CSE IT Department Hindu College of Engineering Sonepat
[ns] available bandwidth
hi all is there any relationship between the throughput and bandwidth. also when we are communication using ad hoc network are we using analog or digital techniques. in most of the research paper are we using the DSSS or some other techniques. what are the available methods for claculating the available bandwidth. do any body have the code for detemining the available bandwidth. any help will be appreciated Neeraj
[ns] calculate the threshold values.
hi all after going through the ns-1 documentation it is very clear that we can calculate the RXThresh_ value. but how can be can calculate the CShresh_ and CPThresh_ values.also the threshold model have certain default values this means the values of all three threshold will change.how can we calculate the same. Neeraj
[ns] code for bandwidth estimation
hi all i am woking on the qos in ad hoc wireless sytem. my problem is if i want to know thw avvailable bandwidth in the system the where should i code ie in link layer or in the mac layer. can anyone send me the code for estimating the bandwidth in ad hoc wireless sytem. Neeraj Gupta Assistant Professor HOD, CSE IT Department Hindu College of Engineering Sonepat
[ns] estination of bandwidth
hi all i doing a project on QoS in ad hoc networks. as my first target is to estimate the bandwidth in the network and required by tha application. can any one tell me is there any function or the way to estimate tha bandwith in the network. how can i run it in ns-2.30 its urgent as i need to submit the progress report. thanks Neeraj Gupta
[ns] bandwidth estimation
hi all how do we calculate the bandwidth requirement of the application . also where in mac layer is bandwidth calculated , self and one hop neighbors. how can we manipulate the algorithm in ns . Neeraj Neeraj
[ns] communication range
hi all i read it ns_mannual that threshold.cc can be used to calculate the receving threshold in the network interface. my question is how to compile the program using gcc or make. neeraj
[ns] make failed
hi all i using ns-allinone-2.30. i trying to run a example from the tutorial NS by Examples where variables in c++ are binded to otcl. i written the code . the tutorial ask to add the object file (ex-linkage.o in my case) at the end of the object file list inMake file located in ns-2.30 directory. i add it under OBJ_CC . am i adding the object at he right place?? if , yes then i tried make clean command (even if you tired running make command) i getting the following error Makefile:311: *** commands commence before first target. stop. the i tried ./configure path but in this case the object.o is wiped out of the Makefile. iam using Fedora 7 as OS. kindly help Neeraj
[ns] make failed
hi all this in response to my earlier mail when i tried to use the make command after adding ex-linkage.o file in Makefile under ns-2.30 directory i recieve the following error make:311: *** commands commence before first target. stop. any help is appreciated neeraj
[ns] binding the variable in ns2
hi all
i am a nascent user of ns2. itried one example from tutorial NS by example
the code is written below
// Jae Chung 7-13-99
// Example of a aimple and dull Agent that
// illustrates the use of OTcl linkages
//code is ex-linkage.cc
#include stdio.h
#include string.h
#include agent.h
class MyAgent : public Agent {
public:
MyAgent();
protected:
int command(int argc, const char*const* argv);
private:
intmy_var1;
double my_var2;
void MyPrivFunc(void);
};
static class MyAgentClass : public TclClass {
public:
MyAgentClass() : TclClass(Agent/MyAgentOtcl) {}
TclObject* create(int, const char*const*) {
return(new MyAgent());
}
} class_my_agent;
MyAgent::MyAgent() : Agent(PT_UDP) {
bind(my_var1_otcl, my_var1);
bind(my_var2_otcl, my_var2);
}
int MyAgent::command(int argc, const char*const* argv) {
if(argc == 2) {
if(strcmp(argv[1], call-my-priv-func) == 0) {
MyPrivFunc();
return(TCL_OK);
}
}
return(Agent::command(argc, argv));
}
void MyAgent::MyPrivFunc(void) {
Tcl tcl = Tcl::instance();
tcl.eval(puts \Message From MyPrivFunc\);
tcl.evalf(puts \ my_var1 = %d\, my_var1);
tcl.evalf(puts \ my_var2 = %f\, my_var2);
}
the tutorial says to put the ex-linkage.o in the make file and then run the
make command. on the first hand the make command is running.
then i do the following steps
./configure, make clean, make
after that i run the tcl script which is given below
# Jae Chung 7-13-99
# Create MyAgent (This will give two warning messages that
# no default vaules exist for my_var1_otcl and my_var2_otcl)
set myagent [new Agent/MyAgentOtcl]
# Set configurable parameters of MyAgent
$myagent set my_var1_otcl 2
$myagent set my_var2_otcl 3.14
# Give a command to MyAgent
$myagent call-my-priv-func
but the i receive the following error
invalid command name Agent/MyAgentOtcl
while executing
Agent/MyAgentOtcl create _o3
invoked from within
catch $className create $o $args msg
invoked from within
if [catch $className create $o $args msg] {
if [string match __FAILED_SHADOW_OBJECT_ $msg] {
delete $o
return
}
global errorInfo
error class $...
(procedure new line 3)
invoked from within
new Agent/MyAgentOtcl
invoked from within
set myagent [new Agent/MyAgentOtcl]
(file ex-linkage.tcl line 5)
also on opening the make file i find that ex-linkage.o is missing from the
makefile.
since i have a project i my hand kindly help me
thanx in advance
Neeraj
Hindu college of engineering, sonepat
Neeraj
[ns] help configure
hi all
i was installing tk8.4.14.i had already installed tcl8.4.14.
while installing i used the following commands
./configure --disable-load --with-tcl=../../tcl8.4.14/unix
make
while i run the make at the end i recevie following error:
{standard input}: Assembler messages:
{standard input}:426: Warning: size of width is already 8; not changing to 4
make: *** [tk3d.o] Error 1
kindly tell me the mistake i am commiting
thanks in advance
Neeraj
