Sorry for the confusion . Got it working now. CTP is enabled with LPL in tinyos 2.1.1 . I was working back and forth with 2.1.0 and 2.1.1 and got confused . Thanks.
On Wed, Feb 16, 2011 at 8:51 PM, Nicole Chiesi <nicole.chi...@gmail.com>wrote: > Thank you for the answers. > I have a question regarding the use of LPL in the CTP > I have made changes in order to make the lpl work in the following way > in "Boot.booted():" > call LowPowerListening.setLocalSleepInterval(250); > > While sending message : > call LowPowerListening.setRxSleepInterval(&packet, 250); > and have used the proper wiring. > > As I read through the mailing list you had mentioned that one needs to hack > into the ctp to send according to LPL for each packet. > However I found out ctp with lpl in the cvs > . > http://hinrg.cs.jhu.edu/git/?p=razvanm/tinyos-2.x.git;a=commit;h=9609b6b90101acae0da46deb835714f9a28d94c1 > but seems like some files are missing e.g the Globals.h. Where can I find > the working version of LPL use in the CTP ? > > regards, > > Nicole > > > On Mon, Feb 14, 2011 at 2:59 AM, Omprakash Gnawali < > gnaw...@cs.stanford.edu> wrote: > >> On Sun, Feb 13, 2011 at 9:15 AM, Nicole Chiesi <nicole.chi...@gmail.com> >> wrote: >> > I am facing a situation where , I use the TestNetwork Application in >> testbed >> > of about 45 telosb motes. I was trying to check the saturation point of >> ctp. >> > I increased the packet rate to some 1 packet per second for about 15 >> nodes >> > and one packet every 8s for >> > the rest 20 motes. I still have a very good delivery ratio of about 98 >> > percentage. >> > How much of data rate is ctp supposed to handle? >> >> CTP is not designed to work with high data rates. It does not limit >> the number of packets injected into the network. So, you should try to >> operate it under channel saturation. What rate will cause channel >> saturation? That will depend on the radio, MAC, network topology, ... >> >> > When I went down to 3packets /sec for the 15 nodes and one packet /8s >> for >> > the rest of the nodes , then was only significant drop in the delivery >> ratio >> > to about 74 percent. >> > I think the results I got are not accurate? i do not know if I did >> something >> > wrong here? >> >> You are sourcing 45+ packets/s. Many of these packets might be >> multi-hop which means the region around the sink is receiving and >> sensing many more packets. You might be way past channel saturation. >> If the channel is not saturated, it is reasonable to expect a decent >> performance. >> >> - om_p >> > >
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