WirelessHART

https://en.wikipedia.org/wiki/WirelessHART

Key Capabilities:

• Reliability even in the presence of interference, thanks to technology like mesh networking, channel hopping, and time-synchronized messaging. WirelessHART coexistence with other wireless networks is assured.

• Security and privacy for network communications through encryption, verification, authentication, key management, and other open industry-standard best practices.

• Effective power management through Smart Data Publishing and other techniques that make batteries, solar and other low-power options practical for wireless devices

The underlying principle for the HART protocol implementation is the ” Time Synchronized Mesh Protocol (TSMP) “. Comprising the TSMP are five key components for time-synchronized communication:

frequency hopping automatic node joining network formation fully redundant mesh routing secure message transfer

The HART protocol for communications in wireless sensor networks is just one of the many available, including ZigBee, Ethernet and proprietary implementations. http://sourcetech411.com/2013/05/hart-protocol-for-communications-in-wireless-sensor-networks/