[e2e] TFRC vs UDP

[Syed Faisal Hasan]

Hi Dado,


>Syed Faisal Hasan wrote:
>>
>>To whom it may concern,
>>
>>TFRC was designed for use by the Continuous Media (CM) applications. But 
>>why will a CM application which is performing well using UDP, use TFRC if 
>>there is performance gap (more latency, less number of packets transmitted 
>>in the same time, high rate fluctuations in the beginning) betwen UDP and 
>>TFRC ? May be thats the reason we haven't seen any applicatons using TFRC. 
>>On the other hand there is no (I haven't found) research which analyzes 
>>the performance difference between UDP and TFRC. It is clear that TFRC 
>>will not perform exactly like UDP ( due to TFRC's friendliness with TCP), 
>>but how much can we expect from TFRC?
>
>
>Hi Syed,
>
>the motivation is that although your application would work fine and you (a 
>single person in a society) would have a good welfare using UDP, it is your 
>fellow citizens that would potentially suffer from your actions. The 
>network resource should be distributed fairly - whatever it means. If we 
>all started to disregard other users, the network might stop working 
>properly - equivalent to anarchy in a society. Mechanisms are needed to 
>guarantee fair distribution of the resource. TFRC attempts to provide 
>mechanisms to distribute the bandwidth resource in the same way TCP does.
>
>I think performance issues depend more on competing TCP flows and the 
>network than on the TFRC control algorithm.

I understand what you are talking about. But I want to know the performance 
difference of
UDP and TFRC in the same scenario. Is there any published research on this?

Faisal

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