Subject: Re: [manet] Doubt in RTS/CTS (fwd)

From: Kan Cai <[email-masked]>
Date: Thu, 12 Feb 2004 16:08:31 -0800 (PST)

On Thu, 12 Feb 2004, Geethapriya Thamilarasu wrote:

> Hi,
> Thanx for the reply,
> But i always thought RTS/CTS are broadcast packets by themselves. Isn't
> that right ?
>
> you send the RTS to all nodes, that is how unintended nodes defer their
> transmission, right?? or am i wrong in my basic understanding of the
> concepts?

Yes, any node in ad hoc network overhearing RTS/CTS will backoff. But for
broadcast message, only basic CSMA/CA is used, that is just random
backoff.

--ken

>
>
> On Thu, 12 Feb 2004, Kan Cai wrote:
>
> >
> > No, RTS/CTS exchange happens when the packet is a unicast pkt. Since RREQ
> > is a broadcast packet, there is no need.
> >
> > Also, there is option in specification that allows you to stop using
> > RTS/CTS for small unicast packet.
> >
> > Hope this helps.
> > --ken
> >
> > On Thu, 12 Feb 2004, Geethapriya Thamilarasu wrote:
> >
> > > Hi all,
> > >
> > > I have a doubt with RTS/CTS transmission at the link layer.
> > > Suppose I have a DSR routing protocol that is sending a RREQ packet in the
> > > network, does the RTS/CTS transmission occur before the RREQ is sent ?
> > > Or is RTS/CTS sent only for data packets.
> > >
> > > Please clarify!
> > >
> > > Geethapriya
> > >
> > >
> > > _______________________________________________
> > > manet mailing list
> > > [email-masked]
> > > https://www1.ietf.org/mailman/listinfo/manet
> > >
> >
> >
>

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