Figure 2.1: The structure of a WirelessHART network
WirelessHART is a TDMA based wireless technology that supports mesh networking. It uses the
2.4GHz ISM radio band, with a bit rate of 250 kbps per channel over totally 15 channels, see (HART
Communication Foundation, 2007). For error control it uses ARQ. The physical layer is inherited from
the IEEE 802.15.4 standard, and consequently, it uses Offset Quadrature Phase-Shift Keying (OQPSK)
modulation. The Physical Layer Protocol Data Unit (PPDU), as specified in (IEEE, 2006), is illustrated in
Figure 2.2
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