[ns] Re: Packet headers

[Laercio Júnior]

I have founded a voice application implementation in the Internet. Each 
voice packet is simulated as a packet CBR, that alternates its sending in 
two states: On - there is voice transmission, and Off - there is no 
transmission, according the On/Off Markov Model. So, I intend to compress 
the headers of these packets. For this, first of all, I want to know what 
headers compose them and its lengths. About the packet size, I still don't 
know. The trace shows 24 bytes for 6.3kbps and frame length of 0.30, but I 
think that is very small. I would need know header length. I know that 
payload length varies according transmission rate and frame length in the 
implementation. For example, if you have a transmission rate of 6.3kbps and 
a frame length of 0.030, the payload length was in bytes: 
Payload_length --> (framelength*transmission_rate *1000) / 8 

[]'s

Laércio


On 4/18/05, Yazeed A. Al-Sbou(ACES) <Yazeed.A.Al-Sbou at student.shu.ac.uk> 
wrote:
> 
> Hi...
> I am very sorry bec i do not have an answer to your question, but I want 
> to
> ask you how did you model the voice application in NS-2, I mean what 
> packet
> size and generation rate you used in your simulation... 
> 
> Thanks alot...
> YOURS...
> Yazeed..
> 
>