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 _______________________________________________ Tinyos-help mailing list [email protected] https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
