About Wireless Networks


For a number of years now a growing utilization of wireless sensor in industrial applications has taken place. Wireless data transmission between sites is nothing new in industrial applications. Being able to transmit data directly from low powered sensors using wireless mesh network technology
combined with central monitoring systems supported by the Internet is a relatively new approach.

In its simplest form a ZigSense wireless network enables data transfer between two wireless nodes.
Data from multiple sensors wired to one node will be transferred over the air to the opposite wireless node. This is also known as Point To Point data transfer. When the number of sensing nodes increases and their physical location is distributed throughout a wide area a different approach must be considered, this is known as wireless mesh networks.

ZigSense wireless sensing technology utilizes ZigBee (2.4GHz) or Digimesh (900MHz) mesh network technologies as its core communications layer. A wireless sensing node monitors and distributes its own data to a known destination. A wireless node may redistribute data generated by other wireless nodes to a predefined destination. Data between wireless nodes may follow a data hopping path from one remote node to another till it arrives at a designated destination.

ZigBee is one implementation of wireless mesh networks. ZigBee’s main advantages: Low cost, low data rate and low power consumption achieving advanced communications using smaller batteries. ZigBee mesh network adds high reliability to wireless communications enabling it to potentially be used in numerous industrial control systems

ZigSense wireless networks main features & benefits:
  • Eliminate the need for cables, cable trays, cable trenches
  • Substantial savings in installation time & costs
  • Wireless sensors can easily be moved from one location to another
  • An entire system can be tested off-site
  • ZigBee protocol supports communications by different vendors
  • Wireless nodes may use redundant communications paths
  • Automatic retries and acknowledgements are built-in
  • Remote wireless nodes save battery through long sleep cycles
  • High intrinsic interference tolerance
  • Multiple communications channels
  • Authentication and AES 128-bit encryption is inherent
  • Multiple mesh networks can co-exist


In a ZigBee mesh network there are three main building blocks:

ZigBee coordinator –The coordinator initiates network formation. One is required for each network.

ZigBee Router – A router extends the wireless network range and is also used to increases the overall number of remote nodes supported by the network.

ZigBee End Point – An end point contains actual sensors and I/Os. An end point is a low power device that is allowed to sleep. It will transfer its data to the network coordinator directly or indirectly via routers.



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