Thanks, Dr Phlip. On 4/8/08, Philip Levis <[EMAIL PROTECTED]> wrote: > > > On Apr 8, 2008, at 4:30 PM, renjie huang wrote: > > > Hi > > Can someone share with me experience of what routing metric is better > > when data rate is high? > > > > Currently I am using MultihopLQI. When the data rate is low, it works > > well and topology is more stable. But when data rate is high, topology > > changes very often. It may be due to interfence from concurrent > > transmission. > > > > Using SNR as link indicator may also has the same problem. Can someone > > give me any advice on this? I don't know whether TinyOS2 introduces some new > > link metric. > > > > Rodrigo, Om, Kyle and I (members of net2) published a paper on the topic > last year: > > Rodrigo Fonseca, Omprakash Gnawali, Kyle Jamieson, and Philip Levis > "Four-Bit Wireless Link Estimation." In Proceedings of the Sixth Workshop > on Hot Topics in Networks (HotNets VI), 2007. > > The short answer: using information from the physical, link, and network > layers is superior than staying at a single layer. The paper describes how > CTP's link estimator works, although the parameters (alpha value) have > changed since its publication. > > Phil >
-- Renjie Huang Sensorweb Research Laboratory http://sensorweb.vancouver.wsu.edu/ Washington State University
_______________________________________________ Tinyos-help mailing list Tinyos-help@millennium.berkeley.edu https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
