RE: [Tinyos-help] shorter (cc2420/telosb) radio range in t2 compared tot1?

2007-10-30 Thread David Moss
Here's one possible explanation: the CSMA backoff changed between T1 and T2. In T1, the CSMA backoff wasn't very fair, allowing one transmitter to possibly hog the channel. The CSMA congestion and initial backoffs were flipped in T2, making the initial backoff longer and the congestion backoff

Re: [Tinyos-devel] RE: [Tinyos-help] shorter (cc2420/telosb) radio range in t2 compared tot1?

2007-10-30 Thread Omprakash Gnawali
I think he is talking about a shorter range and not lower throughput. He says whenever he sends a broadcast packet, fewer nodes receive that broadcast pkt in T2 than in T1. - om_p Here's one possible explanation: the CSMA backoff changed between T1 and T2. In T1, the CSMA backoff wasn't

Re: [Tinyos-devel] RE: [Tinyos-help] shorter (cc2420/telosb) radio range in t2 compared tot1?

2007-10-30 Thread Jeongyeup Paek
Yes... though the scenario is reversed. When all nodes are sending broadcasts, and one basestation is receiving, that base station is receiving packets from *less number of nodes*. thanks - jpaek Omprakash Gnawali wrote: I think he is talking about a shorter range and not lower throughput.

Re: [Tinyos-devel] RE: [Tinyos-help] shorter (cc2420/telosb) radio range in t2 compared tot1?

2007-10-30 Thread Omprakash Gnawali
About the scenario: If a packet is received by many nodes, a node will have received packets from many nodes. - om_p Yes... though the scenario is reversed. When all nodes are sending broadcasts, and one basestation is receiving, that base station is receiving packets from *less number of