ZigBee
Brief Overview
ZigBee is a PAN technology on the IEEE 802.15.4 standard. Unlike Bluetooth or wireless device, ZigBee devices have the ability to form a mesh network between nodes.
A mesh network is a local area network (LAN) that employs one of two connection arrangements, full mesh topology or partial mesh topology. A full mesh topology is shown in the picture. [A mesh network is reliable and offers redundancy. If one node is not available, all others can still communicate directly or through intermediate nodes.]
Recent news on ZigBee
When multiple ZigBee wireless personal area networks (WPANs) are in close proximity to each other, contentions and collisions in transmissions will lead to increased packet delays. However, there is no existing study on how delay performance would be affected in a crowded real-life environment where each person walking down a busy street would be wearing a ZigBee WPAN.
Experiment carried out in real a real world environment
To be pragmatic, we derived a mobility pattern from the analysis of a real-life video trace. Then, we estimated the delay performance from the video trace by combining data collected from ZigBee experiments. The results show that the 300 ms packet delay requirement will not be met for only 11% of the time. When failure occurs, it will last for an average duration of 1.4 s.
Recent news on ZigBee
When multiple ZigBee wireless personal area networks (WPANs) are in close proximity to each other, contentions and collisions in transmissions will lead to increased packet delays. However, there is no existing study on how delay performance would be affected in a crowded real-life environment where each person walking down a busy street would be wearing a ZigBee WPAN.
Experiment carried out in real a real world environment
To be pragmatic, we derived a mobility pattern from the analysis of a real-life video trace. Then, we estimated the delay performance from the video trace by combining data collected from ZigBee experiments. The results show that the 300 ms packet delay requirement will not be met for only 11% of the time. When failure occurs, it will last for an average duration of 1.4 s.
