It is something that should be experimented with. The problem with using RSSI is you get trees with a large number of hops and extra messages being sent and overheard. Just because the output power is low does not mean that the link quality is bad--this is why we chose to use the link quality indicator. According to Chipcon, the LQI value should be combined with the packet error rate (which Chipcon calls "correlation value") to give a reliable value for the overall node link quality. If you're interested, I'd encourage you to try it out--it is essentially combining MintRoute with MultiHopLQI and getting the correlation values correct.
-Joe -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Hardy Griech Sent: Wednesday, August 25, 2004 1:43 AM To: [EMAIL PROTECTED] Subject: [Tinyos-users] MultiHopLQI - is LQI the complete criterium? Hi, in our telos installation we have observed the following behaviour: high RF output power: lqi around 108, strength (RSSI) 20 low RF output power: lqi around 105, strength (RSSI) -30 This all on receiver side of course. Low RF was close to losing signal. So my question: should LQI really the right (and only one) criterium for route selection in MultiHopLQI or shouldn't there be some calculations with lqi and strength to get the parent node? Hardy _______________________________________________ Tinyos-users mailing list [EMAIL PROTECTED] http://mail.Millennium.Berkeley.EDU/mailman/listinfo/tinyos-users _______________________________________________ Tinyos-users mailing list [EMAIL PROTECTED] http://mail.Millennium.Berkeley.EDU/mailman/listinfo/tinyos-users
