If you want to measure latency over seven hops, don't send a broadcast message, send a message addressed to a specific node i.e. always send to (TOS_NODE_ID + 1), then program each node with successive ids and measure the time it takes between sending on the first node in the chain and being received at the end.
Kevin On 9/10/07, Diego Maldonado <[EMAIL PROTECTED]> wrote: > > Hello, professors of berkeley > > Im Diego Maldonado student of Electronic Enginneer from Colombia, > Universidad Industrial de Santander ( UIS). > > Currently i'm developing my bachelor thesis in wireless sensor networks > subject by working with telos B and tmote Sky devices. > > I have a doubt regarding to SimpleCmd Application when it is set up with > Bcast option. > > i'm trying to set a latency testbed where there is a mote conected to my > laptop sending led_on and led_off commands to 7 receivers telos b y tmote > sky. six of them are programmed with bcast option and the last one with > simplecmd (end device), so in theory, i have 7 hops before reach the final > one. > > My question is this: If six of them are programmed to make bcast ..how can i > know about the order of forwarding packets? I mean, as they are all under > the same cordinator coverage range , how can I kwow if a command sended from > the cordinator is being received for 2 or more bcast motes at the same > time, which would be a problem because I want the data to hop from the first > Bcast receiver to the second and then to 3rd one and so on, until reaching > the final one...so i can register the latenciy caused by going through > several hops. > > I hop you can understand my non-perfect english and I appreciate if you can > give me a hand with this ....I only have a week to deadline. > > thank you very much friends from Berkeley > > Diego Armando Maldonado. > > > -- > Open WebMail Project (http://openwebmail.org) > > > _______________________________________________ > Tinyos-help mailing list > Tinyos-help@Millennium.Berkeley.EDU > https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help > -- ~Kevin _______________________________________________ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
