neighbors that are within the transmission range of a wifi node

[amine zouaoui]

Hi;

I want to get a wifi node neighbors that are within its transmission range and not all the nodes that have a netDevice on the same channel object.

method : "Node::GetDevice (i)->GetChannel ()->GetNDevices();" return the number of neighbors of a device (node) and it counts all the devices which share the same channel. so method : "Node::GetDevice (i)->GetChannel ()->GetDevice(j);" (return the j neighbor device of a device (node)) can return a neighbor device which shares the same channel and which is not within the transmission range of our netDevice (node). 

Is there other methods that return just neighbors and number of neighbors that are within the transmission range of a node?

thank you. 

[oark saha]

have you found the solution..please do post ...

[Deep Singh]

Yeah I'm also looking for it. Please help us here...

[PATEL RAJANKUMAR]

hi

could u send the complete code, please.

i need to use or discover the neighbor node.

thanks

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[amine zouaoui]

Hi;

I didn't find the solution yet, but I use a temporary solution -where neighboring relations is obtained from the topology-  until find another solution.

I'm working on a grid topology (X*Y) where nodes are at fixed position. and consider that :
-"DeltaX" and "DeltaY" = 175,
-"GridWidth" = X

-and "LayoutType" is "RowFirst"

so, neigbhors of node N are obtained as follow:
let :
m = N / X
and r = (N - (m * X)). or r= N%X

if ( r != 0 ) => node (N - 1) is a neighbor of node N

if ( r != ( X - 1 ) ) =>  node (N + 1) is a neighbor of node N

if ( m != ( Y - 1 ) => node (N + X) is a neighbor of node N

if ( m != 0 ) => node (N - X) is a neighbor of node N

for example : in a topology of 10*6, neighbors of node 33 are nodes : 32, 34, 43 and 23

and in a topology of 5*4, neighbors of node 14 are nodes : 13, 24 and 9.

I hope that helps.   

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[Prathap Uppara]

Hi,
Any update on finding the neighbor node?
Pls share if there is a API to find the same.
Thanks

[Konstantinos]

Hi,

The simplest way to do that is to broadcast HELLO messages and keep track of those you hear.

This is already implemented in OLSR and AODV protocols and it is not hard to do it yourself.