Re: [Tinyos-help] MultihopOscilloscope Problem on Motelab Testbed

2010-03-22 Thread Tao Liu
On Mon, Mar 22, 2010 at 12:06 AM, Omprakash Gnawali gnaw...@cs.stanford.edu wrote: On Sat, Mar 20, 2010 at 5:46 PM, Tao Liu liu3...@gmail.com wrote: Hi, I am trying to run apps/MultihopOscilloscope on Harvard's Motelab testbed, but no radio message is delivered to the root node. The only

[Tinyos-help] MultihopOscilloscope Problem on Motelab Testbed

2010-03-20 Thread Tao Liu
Hi, I am trying to run apps/MultihopOscilloscope on Harvard's Motelab testbed, but no radio message is delivered to the root node. The only change I made is to set the root node manually in MultihopOscilloscopeC.nc:   event void SerialControl.startDone(error_t error) {     if (error != SUCCESS)

[Tinyos-help] MultihopLQI - adjustLQI problem

2009-09-04 Thread Tao Liu
Hi all, I am studying the source code of MultihopLQI, a multihop routing protocol in TinyOS 2.1.0 (tos/lib/net/lqi). In its routing engine (LqiRoutingEngineP.nc), the LQI value of beacon messages are adjusted using the following function:   uint16_t adjustLQI(uint8_t val) {     uint16_t result

Re: [Tinyos-help] Implementation of CompareBit interface

2008-08-11 Thread Tao Liu
PROTECTED] wrote: On Mon, Aug 11, 2008 at 5:10 PM, Tao Liu [EMAIL PROTECTED] wrote: Hi all, I am studying the 4bitle link estimator in the TinyOS 2. In the tos/lib/net/4bitle/LinkEstimatorP.nc (line 647), the 4bit estimator signals the CompareBit.shouldInsert() event when it received a beacon

[Tinyos-help] Routing Protocols in TinyOS 2

2008-02-28 Thread Tao Liu
Dear all, I am a beginner in TinyOS, and I am trying to understand the routing algorithms used in TinyOS 2. According to the TEP 123, TinyOS 2.0 uses CTP as the routing protocol for multihop communications, which uses ETX as the route metric to estimate the quality of a link. However, my