time slotted channel hopping (TSCH)
Time Slotted Channel Hopping (TSCH) is a time-synchronous channel hopping method that is part of the IEEE 802.15.4e standard. With TSCH hopping, all 16 channels of802.15.4 are randomly assigned, which also means that the different channels are confronted with different interface levels to which the hopping signal must be adapted.
The hopping scheme does not use all available transmission channels, but avoids those affected by interference in the ISM band.
TSCH originates from the Time Synchronized Mesh Protocol( TSMP). Here, the time domain is divided into an infinite number of discrete time slots that are shared between all network nodes. Each Wireless Sensor Networks(WSN) network node receives a synchronized record of the elapsed time slots, which is used to calculate the operating channel.
The time-synchronized channel hopping method improves the robustness of the transmission against interference and fading. It is used in Wireless Sensor Networks (WSN) operating according to 802.15.4e, also in Bluetooth, WirelessHART, JupiterMesh and Dust Networks.