[ns] Tcl script problems

[Mucktar Pakpahan]

hi,

Could you please help me to make the tcl script for this scenario?

O--------       -------BS ------------MN
        |       |               
O-------O------ R------O  ------------BS -------------MN
        |       |         |------------O
O-------        ----------R------------O
                          |------------O
                          ------------BS -------------MN

O       --> Wired conencted nodes 
BS      --> Base Station
R       --> Router
MN      --> Mobile Nodes

regards

Mucktar