On Jun 17, 2009, at 3:20 PM, Philip Loden wrote: > Hi, > > I'm doing experiments related to a voice-over-WSN application. In > "T2: A Second Generation OS for Embedded Sensor Networks" it states > that the MicaZ is capable of sending at a rate of nearly 400 pps. > I've been able to achieve only about 100 pps on the TelosB under > TinyOS-2.1.0. I'm basically using AMSenderC and calling send from > within sendDone. Any thoughts or suggestions?
400pps comes from when you turn of MAC backoff. The average packet latency with the standard MAC backoff is ~7-8ms, and can be higher if there is 802.11 interference or other issues, so 10ms (100pps) is not unreasonable. The point of that measurement was to say that that the OS structure and optimizations meant the code could handle packets at that rate: whether doing so is a good idea from a MAC standpoint is a wholly different question. Hope this helps, Phil _______________________________________________ Tinyos-help mailing list [email protected] https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
