Re: [ns] Random time to send a packet
Thanks for the response Christos!!
I tried the while solution with no success. Is there any way to wait, for
instance, 100ms, before the command send(pktret,0) is executed ? I guess
it's a simple issue, but until now I was not able to solve.
Does anyone can suggest something to do ?
Thanks all!!
2012/10/3 Christos Spatiotis spati...@ceid.upatras.gr
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
Hello , Rafael
If you try to put send(pktret,0) in a while which run for a random
time. I guess i do not know.
Please let me know if you make it.
On 10/03/2012 05:37 PM, Rafael P B Mota wrote:
Hello,
I am trying to use a random delay (in receiver) before the packet
is sent back to the sender agent. For example:
1) the receiver agent receive the sender packet 2) the receiver
sets up a response packet 3) Wait for a random time (in ms) 4)
sends the packet.
I don't know how to do the step 3.
I am pasting the code bellow: Somebody can help me ?
void MyAgent::recv(Packet* pkt, Handler*) { hdr_ip* hdrip =
hdr_ip::access(pkt); hdr_rfidPacket* hdr =
hdr_rfidPacket::access(pkt); if (hdr-tipo_==1) { Packet* pktret =
allocpkt(); hdr_rfidPacket* hdrTag =
hdr_rfidPacket::access(pktret); hdr_ip* hdrIp =
hdr_ip::access(pktret); hdrTag-tagEPC_ = tagEPC_; hdrTag-id_ =
hdr-id_; hdrTag-tipo_ = 0; hdrIp-daddr() = IP_BROADCAST;
hdrIp-dport() = hdrip-sport(); *//HOWTO WAIT A RANDOM TIME (in
miliseconds) before send back the packet ??* send(pktret,0); } else
{ Packet::free(pkt); } Packet::free(pkt); return; }
- --
===
Undergraduate student Spatiotis Christos
Department of Computer Engineering Informatics (CEID)
University of Patras, Greece
e-mail: spati...@ceid.upatras.gr
website: http://spatiotis.wordpress.com
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--
Rafael Perazzo B Mota
r pera...@ime.usp.brafaelpera...@gmail.com
Web-page: https://sites.google.com/site/rafaelperazzo/
Doutorando em Ciência da Computação
Universidade de São Paulo (USP)
Campus da Capital
Instituto de Matemática e estatística (IME)
--
Re: [ns] Random time to send a packet
Hello Natalya,
I tryed the solution:
srand(time(NULL));
int tempo = rand() % 400 + 100;
Scheduler sch = Scheduler::instance();
sch.schedule(target_,pktret,tempo);
//send(pktret,0);
But the packet is not sent.
If I uncomment the line send(pktret,0) I get an error like this: Scheduler:
Event UID not valid!
What should I do ?
2012/10/3 Natalya Rozhnova rojnovanatha...@yandex.ru
Hi,
There are two ways to do it. Try this way for example:
Scheduler sch = Scheduler::instance();
sch.schedule(target_, [packet you want to send], [delay in ms]);
The second way I don't remember exactly but it consists in using the
function reschedule. You can read about these functions in detail in ns2
manual.
Hope it helps you,
--
Cordialement,
Natalya Rozhnova
03.10.2012, 21:44, Rafael P B Mota rafaelpera...@gmail.com:
Hello,
I am trying to use a random delay (in receiver) before the packet is sent
back to the sender agent. For example:
1) the receiver agent receive the sender packet
2) the receiver sets up a response packet
3) Wait for a random time (in ms)
4) sends the packet.
I don't know how to do the step 3.
I am pasting the code bellow: Somebody can help me ?
void MyAgent::recv(Packet* pkt, Handler*)
{
hdr_ip* hdrip = hdr_ip::access(pkt);
hdr_rfidPacket* hdr = hdr_rfidPacket::access(pkt);
if (hdr-tipo_==1) {
Packet* pktret = allocpkt();
hdr_rfidPacket* hdrTag = hdr_rfidPacket::access(pktret);
hdr_ip* hdrIp = hdr_ip::access(pktret);
hdrTag-tagEPC_ = tagEPC_;
hdrTag-id_ = hdr-id_;
hdrTag-tipo_ = 0;
hdrIp-daddr() = IP_BROADCAST;
hdrIp-dport() = hdrip-sport();
*//HOWTO WAIT A RANDOM TIME (in miliseconds) before send back the
packet ??*
send(pktret,0);
}
else {
Packet::free(pkt);
}
Packet::free(pkt);
return;
}
--
Rafael Perazzo B Mota
r pera...@ime.usp.brafaelpera...@gmail.com
Web-page: https://sites.google.com/site/rafaelperazzo/
Doutorando em Ciência da Computação
Universidade de São Paulo (USP)
Campus da Capital
Instituto de Matemática e estatística (IME)
--
--
Rafael Perazzo B Mota
r pera...@ime.usp.brafaelpera...@gmail.com
Web-page: https://sites.google.com/site/rafaelperazzo/
Doutorando em Ciência da Computação
Universidade de São Paulo (USP)
Campus da Capital
Instituto de Matemática e estatística (IME)
--
Re: [ns] Random time to send a packet
Hello Natalya,
I found a problem in my random number generator. The number generated was
to high.
I tried to use your solution (Random::uniform(0,1)) but the compiler was
unable to find the function and class Random. What library should I include
to use Random::uniform ?
Another question: If I use sch:schedule(target_,packet,time) there's no
need to use the function send(packet) ?
Thank you very much for your help!!!
Rafael
2012/10/3 Natalya Rozhnova rojnovanatha...@yandex.ru
Hey, In addition I guess the delay has to be in seconds and not in
milliseconds.
03.10.2012, 22:51, Natalya Rozhnova rojnovanatha...@yandex.ru:
It's strange... I use exactly the same idea. (I guess you are working on
information-centric networking :-) ). Here is a piece of my code I'm using
in my server agent:
rtt_alea = Random::uniform(0,1);
Scheduler sch = Scheduler::instance();
sch.schedule(target_, Chunk, rtt_alea);
You don't need the function send using this realization.
or me everything works well... Try to print your delay value, may be it is
not computed correctly and probably it's very large.
Print your tempo value into the consol to be sure this is not a trouble.
03.10.2012, 22:38, Rafael P B Mota rafaelpera...@gmail.com:
Hello Natalya,
I tryed the solution:
srand(time(NULL));
int tempo = rand() % 400 + 100;
Scheduler sch = Scheduler::instance();
sch.schedule(target_,pktret,tempo);
//send(pktret,0);
But the packet is not sent.
If I uncomment the line send(pktret,0) I get an error like this: Scheduler:
Event UID not valid!
What should I do ?
2012/10/3 Natalya Rozhnova rojnovanatha...@yandex.ru
Hi,
There are two ways to do it. Try this way for example:
Scheduler sch = Scheduler::instance();
sch.schedule(target_, [packet you want to send], [delay in ms]);
The second way I don't remember exactly but it consists in using the
function reschedule. You can read about these functions in detail in ns2
manual.
Hope it helps you,
--
Cordialement,
Natalya Rozhnova
03.10.2012, 21:44, Rafael P B Mota rafaelpera...@gmail.com:
Hello,
I am trying to use a random delay (in receiver) before the packet is sent
back to the sender agent. For example:
1) the receiver agent receive the sender packet
2) the receiver sets up a response packet
3) Wait for a random time (in ms)
4) sends the packet.
I don't know how to do the step 3.
I am pasting the code bellow: Somebody can help me ?
void MyAgent::recv(Packet* pkt, Handler*)
{
hdr_ip* hdrip = hdr_ip::access(pkt);
hdr_rfidPacket* hdr = hdr_rfidPacket::access(pkt);
if (hdr-tipo_==1) {
Packet* pktret = allocpkt();
hdr_rfidPacket* hdrTag = hdr_rfidPacket::access(pktret);
hdr_ip* hdrIp = hdr_ip::access(pktret);
hdrTag-tagEPC_ = tagEPC_;
hdrTag-id_ = hdr-id_;
hdrTag-tipo_ = 0;
hdrIp-daddr() = IP_BROADCAST;
hdrIp-dport() = hdrip-sport();
*//HOWTO WAIT A RANDOM TIME (in miliseconds) before send back the
packet ??*
send(pktret,0);
}
else {
Packet::free(pkt);
}
Packet::free(pkt);
return;
}
--
Rafael Perazzo B Mota
r pera...@ime.usp.brafaelpera...@gmail.com
Web-page: https://sites.google.com/site/rafaelperazzo/
Doutorando em Ciência da Computação
Universidade de São Paulo (USP)
Campus da Capital
Instituto de Matemática e estatística (IME)
--
--
Rafael Perazzo B Mota
r pera...@ime.usp.brafaelpera...@gmail.com
Web-page: https://sites.google.com/site/rafaelperazzo/
Doutorando em Ciência da Computação
Universidade de São Paulo (USP)
Campus da Capital
Instituto de Matemática e estatística (IME)
--
--
Rafael Perazzo B Mota
r pera...@ime.usp.brafaelpera...@gmail.com
Web-page: https://sites.google.com/site/rafaelperazzo/
Doutorando em Ciência da Computação
Universidade de São Paulo (USP)
Campus da Capital
Instituto de Matemática e estatística (IME)
--
Re: [ns] Random time to send a packet
Hello Natalya
Thank you very much for your help. Now my agent is working properly. It
delays x random seconds.
Rafael
2012/10/3 Natalya Rozhnova rojnovanatha...@yandex.ru
Hi Rafael,
In order to use the Random class of ns2 you should include random.h in
your code. I guess there are some differents distributions of random
numbers, not only uniform.
Normally sch.schedule (blabla) is the same function as send. So, the
difference between send and schedule is just that the first one sends a
packet p with no delay while the second one adds a little delay before
sending a packet p.
If you look a realization of the function send you'll find something
like target_-recv(p).
What's about schedule: this is a timer that executes the same
target_-recv(p) but in some seconds (the third parameter: a delay).
Natalya
03.10.2012, 23:46, Rafael P B Mota rafaelpera...@gmail.com:
Hello Natalya,
I found a problem in my random number generator. The number generated was
to high.
I tried to use your solution (Random::uniform(0,1)) but the compiler was
unable to find the function and class Random. What library should I include
to use Random::uniform ?
Another question: If I use sch:schedule(target_,packet,time) there's no
need to use the function send(packet) ?
Thank you very much for your help!!!
Rafael
2012/10/3 Natalya Rozhnova rojnovanatha...@yandex.ru
Hey, In addition I guess the delay has to be in seconds and not in
milliseconds.
03.10.2012, 22:51, Natalya Rozhnova rojnovanatha...@yandex.ru:
It's strange... I use exactly the same idea. (I guess you are working on
information-centric networking :-) ). Here is a piece of my code I'm using
in my server agent:
rtt_alea = Random::uniform(0,1);
Scheduler sch = Scheduler::instance();
sch.schedule(target_, Chunk, rtt_alea);
You don't need the function send using this realization.
or me everything works well... Try to print your delay value, may be it is
not computed correctly and probably it's very large.
Print your tempo value into the consol to be sure this is not a trouble.
03.10.2012, 22:38, Rafael P B Mota rafaelpera...@gmail.com:
Hello Natalya,
I tryed the solution:
srand(time(NULL));
int tempo = rand() % 400 + 100;
Scheduler sch = Scheduler::instance();
sch.schedule(target_,pktret,tempo);
//send(pktret,0);
But the packet is not sent.
If I uncomment the line send(pktret,0) I get an error like this:
Scheduler:
Event UID not valid!
What should I do ?
2012/10/3 Natalya Rozhnova rojnovanatha...@yandex.ru
Hi,
There are two ways to do it. Try this way for example:
Scheduler sch = Scheduler::instance();
sch.schedule(target_, [packet you want to send], [delay in ms]);
The second way I don't remember exactly but it consists in using the
function reschedule. You can read about these functions in detail in ns2
manual.
Hope it helps you,
--
Cordialement,
Natalya Rozhnova
03.10.2012, 21:44, Rafael P B Mota rafaelpera...@gmail.com:
Hello,
I am trying to use a random delay (in receiver) before the packet is sent
back to the sender agent. For example:
1) the receiver agent receive the sender packet
2) the receiver sets up a response packet
3) Wait for a random time (in ms)
4) sends the packet.
I don't know how to do the step 3.
I am pasting the code bellow: Somebody can help me ?
void MyAgent::recv(Packet* pkt, Handler*)
{
hdr_ip* hdrip = hdr_ip::access(pkt);
hdr_rfidPacket* hdr = hdr_rfidPacket::access(pkt);
if (hdr-tipo_==1) {
Packet* pktret = allocpkt();
hdr_rfidPacket* hdrTag = hdr_rfidPacket::access(pktret);
hdr_ip* hdrIp = hdr_ip::access(pktret);
hdrTag-tagEPC_ = tagEPC_;
hdrTag-id_ = hdr-id_;
hdrTag-tipo_ = 0;
hdrIp-daddr() = IP_BROADCAST;
hdrIp-dport() = hdrip-sport();
*//HOWTO WAIT A RANDOM TIME (in miliseconds) before send back the
packet ??*
send(pktret,0);
}
else {
Packet::free(pkt);
}
Packet::free(pkt);
return;
}
--
Rafael Perazzo B Mota
r pera...@ime.usp.brafaelpera...@gmail.com
Web-page: https://sites.google.com/site/rafaelperazzo/
Doutorando em Ciência da Computação
Universidade de São Paulo (USP)
Campus da Capital
Instituto de Matemática e estatística (IME)
--
--
Rafael Perazzo B Mota
r pera...@ime.usp.brafaelpera...@gmail.com
Web-page: https://sites.google.com/site/rafaelperazzo/
Doutorando em Ciência da Computação
Universidade
