One of the loudest argument against ZigBee has been
the lack of industrial-grade robustness. First of all, there is
no frequency diversity since the entire network shares the
same static channel, making it highly susceptible to both
unintended and intended jamming. This also means that
the severe frequency selective fading due to the metal-rich
propagation environments in plants potentially can stop all
ZigBee communication. Moreover, the static channel will
also increase interference for other systems like wirelessLAN,
and increase delay as the network size grows and
collisions forces retransmissions. Secondly, there is no
path diversity meaning that in case of a link is broken, a
new path from source to destination must be set up. This
increases both delay and overhead, and route-discovery
will eventually consume all bandwidth available in environments
with unstable routes. Furthermore, the lack of
robustness also means that ZigBee is less suited for control
applications
One of the loudest argument against ZigBee has beenthe lack of industrial-grade robustness. First of all, there isno frequency diversity since the entire network shares thesame static channel, making it highly susceptible to bothunintended and intended jamming. This also means thatthe severe frequency selective fading due to the metal-richpropagation environments in plants potentially can stop allZigBee communication. Moreover, the static channel willalso increase interference for other systems like wirelessLAN,and increase delay as the network size grows andcollisions forces retransmissions. Secondly, there is nopath diversity meaning that in case of a link is broken, anew path from source to destination must be set up. Thisincreases both delay and overhead, and route-discoverywill eventually consume all bandwidth available in environmentswith unstable routes. Furthermore, the lack ofrobustness also means that ZigBee is less suited for controlapplications
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