SHORT in WSN implementation matlab code

there are 100 nodes.first pairing between neighbor nodes.one is sender other is receiver.after that again we got 50 receiver nodes and other 50 nodes discarded.pairing those 50 nodes using same algo.and get 25 nodes. this process goes on until 1 node remaining.how can i implement this.plz help

[Walter Roberson]

Do all of the nodes have paths to each other? Can it be pre-determined which node will transmit to which, or does it need to be determined at run time?

How is the spectrum to be managed so that you can have 50 simultaneous transmissions?