Hey Arik, So can i conclude that this min delay cannot be avoided?? > Hi Deeksha, > > I have investigated the same issue, and tried to reduce the CSMA > thresholds; > but couldn't achieve less then about 18 mSec (average). > Of course it depends on the packet's size. > > Arik > > > On Tue, Apr 6, 2010 at 15:56, Deeksha Rao Sahib > <[email protected]>wrote: > >> >> Hi, >> >> If the delays are due to backoffs then disabling the CCA should give me >> lesser delay rite?? >> >> But its still the same.. >> >> Printing local times at CC2420 Transmit and Receive programs what i >> found >> out is that at the sender there is a min delay of 9ms between call >> AMSend.send command and the SendDone event. >> >> Also at the receiver side there is a delay of 13ms by the time receive >> event is triggered in the application when compared with the timestamp.. >> >> Can these delays be trusted or is there any mistake in this analysis?? >> >> > >> >> On Wed, Mar 31, 2010 at 1:40 AM, Deeksha Rao Sahib >> >> <[email protected]> wrote: >> >>> >> >>> Hi all, >> >>> >> >>> I am using FTSP in my code for time sync and I've been trying to >> >>> measure >> >>> the hop delay for different links in the network. From the initial >> >>> tests >> >>> using global time and the timestamps i figure out that the per hop >> >>> delay >> >>> is about 20 ms. >> >>> >> >>> My applications requires that this delay be minimized. How can this >> be >> >>> done?? >> >>> Any inputs would help... >> >> >> >> Some of that delay is due to MAC backoffs etc. before the packets are >> >> sent. You can reduce them but that can invite suboptimal MAC >> >> performance. >> >> >> >> - om_p >> >> >> >> -- >> >> This message has been scanned for viruses and >> >> dangerous content by MailScanner, and is >> >> believed to be clean. >> >> >> > >> > >> > --Deeksha >> > >> >> >> --Deeksha >> >> -- >> This message has been scanned for viruses and >> dangerous content by MailScanner, and is >> believed to be clean. >> >> _______________________________________________ >> Tinyos-help mailing list >> [email protected] >> https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help >> > > > > -- > Best Regards, > Arik Sapojnik > > -- > This message has been scanned for viruses and > dangerous content by MailScanner, and is > believed to be clean. > >
--Deeksha -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. _______________________________________________ Tinyos-help mailing list [email protected] https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
