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.br>afaelpera...@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.br>afaelpera...@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.br>afaelpera...@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.br>afaelpera...@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)
------------------------------------------------------------------------------------------------------------------
