[Tinyos-help] Exact Data Rate and Time to transmit on Tmotes

2009-12-03 Thread Somnath Mitra
Hello , I need the exact data rate number that is achievable on a tmote (I do not mean CC2420 data rate - which is 250 kbps). I mean the data rate that is achievable taking into account the MAC layer. I would also like to know the time to transmit [probably a formula] a packet of n bytes, from

Re: [Tinyos-help] Exact Data Rate and Time to transmit on Tmotes

2009-12-03 Thread Paul Johnson
Somnath, There aren't really straightforward answers to your questions because they both are non-deterministic to a degree. For the first question: What data rate are you talking about? The raw number of bits(including headers/footers?) that can be successfully delivered over the air

Re: [Tinyos-help] Exact Data Rate and Time to transmit on Tmotes

2009-12-03 Thread Faisal Aslam
Hi, I have produced some results using Sentilla-JCreate and they are valid for Tmote if it behave similar (I guess so). The round trip time (RTT) of Tmote for one byte long packet is around 17ms. That is if only one mote is sending and medium is totally free. The motes are placed only one

Re: [Tinyos-help] Exact Data Rate and Time to transmit on Tmotes

2009-12-03 Thread Somnath Mitra
Paul , Thanks for the reply. Let me try to explain my scenario according to your questions: Data Rate : Not the raw physical layer data rate which is 250 kbps for CC2420. A number that accounts for the MAC layer including the headers and footers, and also the headers and footers of AMSenderC.