Clustering in NS2

How to Make clustering in NS2?

      Following are the steps to add clustering technique in your TCL file.

Step 1:
            Configure the node object to have address type as Hierarchical.   

# set up for hierarchical routing

$ns_ node-config -addressType hierarchical

Step 2:           No. of domains in the networking topology is 2

AddrParams set domain_num_ 2  ;    # number of domains

Step 3:

No. of clusters in each of these domains is defined as "2 1" which indicates the first domain (wired) to have 2 clusters and the second (wireless) to have 1 cluster.

lappend cluster_num 2 1 ;     # number of clusters in each domain

Step 4:

 The No. of nodes in each of these clusters which is "1 1 4"; i.e one node in each of the first 2 clusters (in wired domain) and 4 nodes in the cluster in the wireless domain

AddrParams set cluster_num_ $cluster_num

lappend eilastlevel 1 1 4 ;       # number of nodes in each cluster 

AddrParams set nodes_num_ $eilastlevel ;    # of each domain

Step 5: 

     Creation of topography which is nothing but networking area size defined in X && Y co-ordinates (Ex: Grid 1500 x 700)

# Create topography object

set topo   [new Topography]

# define topology

$topo load_flatgrid $opt(x) $opt(y)

$ns_ node-config -adhocRouting $opt(adhocRouting) \
                 -llType $opt(ll) \
                 -macType $opt(mac) \
         -topoInstance $topo \

Step 6: 
Consider creating nodes for wired Domain
#create nodes
set temp {0.0.0    0.1.0}        ;# hierarchical addresses for domain 1 (Consider it as Wired)
for {set i 0} {$i < $num_wired_nodes} {incr i} {
    set W($i) [$ns_ node [lindex $temp $i]] 
}

Step 7:
Consider creating nodes for Wireless domain
set temp {1.0.0   1.0.1   1.0.2   1.0.3}   ;# hier address to be used for wireless
#configure for mobile nodes
$ns_ node-config -wiredRouting OFF

  for {set j 0} {$j < $opt(nn)} {incr j} {
    set node_($j) [ $ns_ node [lindex $temp \
   [expr $j+1]] ]
    $node_($j) base-station [AddrParams addr2id \
   [$BS(0) node-addr]]
}

Step 8 :
              Please add the above relevant code in your TCL file. Take your Tcl code of any protocol used . Add the clustering code in ur tcl and see the result in NAM animator. the nodes will be in cluster based.