[ns] Simulating Hidden Nodes with LANs

[Iain Marcuson]

> excuse me, but what is ur concept of a group and which MAC
> protocol u intend
> to use. I guess there is no concept of a group in 802.11,
> if u work on it?

My concept of a group is essentially a city, and the MAC protocol is intended to be non-persistent CSMA.  

With the groups as cities, any node in the city can hear any transmissions from any other node in the city.  At the edges of the city, the nodes there can reach the neighboring city.   

NYC                          Syracuse                        Rochester                         Buffalo                  E------>
a  b  c                        d       e      f                  g           h         j                 k       m        n

In the above diagram, if "b" were to transmit, nodes "a" and "c" could hear him.  In addition, node d would hear him.  If node c were to transmit, nodes "a" through "f" would hear him.  However, due to the longer distance, node "b" and node "h" could both be talking and not interfere with each other.

I mention 802.11 only because the list archives pointed out that it could be used to perform CSMA.