Hi, First, in general, CBR is used for UDP traffic, not with TCP. You should be able to tell the specific reason why you use CBR over TCP.
And the question you asked is also dependent upon a bottleneck link speed and a bottleneck queue size. If the dely-bandwidth product is larger than the CBR interval, it is likely that TCP will wait for the CBR interval in oder to send a packet. Soo-Hyun On 4/11/06, 김병길 <[EMAIL PROTECTED]> wrote: > > Hi all, > > > > I perform simulation of TCP using NS-2 simulator. > > I already read all mails about CBR over TCP. > > But, I really not understand about TCP mechanism when CBR is used. > > > > 1. use following TCP parameters : > > 1) CBR packetsize : 500 > > 2) TCP packetsize : default > > > > When I start CBR traffic of 500kbps, I can measure throughput of TCP. > > The result is 2.2Mbps! Is it possible? > > > > I know that TCP ignore packetsize upper layer and TCP has own estimation of > stable link and suitable time to send the packet. > > But, my problem is that TCP does not wait the whole size from CBR > > It seems that TCP sends own packetsize with CBR interval. > > > > So, my question is why this is happened? and what is the possible problem? > > Or, is it my mistake? > > > > Thanks in advance. > > > >
