[Tinyos-help] [Tossim] Duplicate messages

[Pratibha S]

Correction: In the receive message, it is not "Source Node" but Destination
Node.

On Thu, Aug 28, 2008 at 1:08 PM, Pratibha S <psundars at gmail.com> wrote:

> Hi,
>
> I use a 200 node topology(topology is connected with zero link loss rates)
> on Tossim. I want to calculate the quality of the network in terms of path
> stretch and success rate. For that each node will send messages to all other
> nodes periodically for one cycle. I capture the sent and received packet
> details onto a file. So, I send 39,800 messages totally.
>
> I find that the packet loss in between the nodes are high (approx. 50%)
> even though the link loss rates are zero. Does this mean that, tossim
> simulates packet loss due to collisions and interference? Even if it does,
> would the loss rate be this high?
> I see a a lot of duplicate receive messages though the sends are unique.
> Can anyone tell me why?
>
> *Sent messages
> 1.Message_Type 2.Source_Node 3.Destination_Node 4.Data
> ........
> SEND [35] [150] (186,60)
> SEND [35] [66] (102,953)
> SEND [35] [181] (17,114)
> SEND [35] [185] (21,766)
> SEND [35] [33] (69,253)
> SEND [35] [152] (188,310)
> SEND [35] [29] (65,685)
> SEND [35] [56] (92,940)
> SEND [35] [96] (132,31)
> SEND [35] [151] (187,1070)
> SEND [35] [90] (126,961)
> SEND [35] [133] (169,224)
> SEND [35] [70] (106,9)
> SEND [35] [72] (108,656)
> SEND [35] [168] (4,666)
> SEND [35] [54] (90,296)
> SEND [35] [154] (190,588)
> SEND [35] [97] (133,1227)
> SEND [35] [157] (193,892)
> SEND [35] [41] (77,243)
> ......
> *
> *Receive messages*
> *1.Message_Type 2.Source_Node 3.Data 4.hop_count*
> .........
> *RECEIVE 123 (1201,126)  86
> RECEIVE 123 (1201,126)  86
> RECEIVE 35 (993,216)  108
> RECEIVE 93 (1278,50)  88
> RECEIVE 93 (1278,50)  88
> RECEIVE 35 (993,216)  108
> RECEIVE 93 (1278,50)  88
> RECEIVE 35 (993,216)  108
> RECEIVE 35 (993,216)  108
> RECEIVE 35 (993,216)  108
> RECEIVE 74 (889,128)  106
> RECEIVE 35 (993,216)  108
> RECEIVE 74 (889,128)  106
> RECEIVE 74 (889,128)  106
> RECEIVE 35 (993,216)  108
> RECEIVE 74 (889,128)  106
> RECEIVE 74 (889,128)  106
> RECEIVE 35 (993,216)  108
> RECEIVE 35 (993,216)  108
> RECEIVE 74 (889,128)  106
> RECEIVE 35 (993,216)  108
> RECEIVE 74 (889,128)  106
> RECEIVE 20 (76,647)  31
> RECEIVE 74 (889,128)  106
> .....................
> ....................(150+ messages)
> RECEIVE 10 (1204,950)  103
> RECEIVE 10 (1204,950)  103
> RECEIVE 35 (993,216)  112
> .........
>
> *Thanks,
> Pratibha
> *
> *
>
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