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EURASIP Journal on Wireless Communications and Networking
Fig. 5 | EURASIP Journal on Wireless Communications and Networking

Fig. 5

From: Cluster tree topology construction method based on PSO algorithm to prolong the lifetime of ZigBee wireless sensor networks

Fig. 5

Particle population initialization. We use the adjacency matrix to generate particles. As shown in Fig. 5, nodes that can communicate with each other are first connected by dashed lines to create an adjacency matrix. Here, 1 indicates a connection state, and 0 indicates a non-connection state. Next, the lower left half of the adjacency matrix is taken out and rewritten as one line as shown in Fig. 5. Finally, particles can be generated by randomly extracting a number from each part

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