Abstract
ZigBee Network Layer, the main purpose of the agreement is to provide reliable and secure transmission. There are three kinds of networks topology in ZigBee Network Layer: Star topology, Tree topology, Mesh topology. This study was used in the experiment of the packet size and speed are not great, postponed plans did not change significantly. However, the same packet would be delayed with the lost, only a very small number, but if increasing the amount of packets with the transmission speed, delay will increase with the loss of. When over load, will be a substantial loss. From the experiments, the tree to delay longer than the star topology and mesh topology a long time, star topology is also informed that easy to synchronize the delay time is to do the least. Although the delay of the mesh topology is better than the tree topology, but the mesh topology to play its characteristics, his performance is better than the star and tree topology.
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