Page 291 - ITU-T Focus Group IMT-2020 Deliverables

ITU-T Focus Group IMT-2020 Deliverables 4

Localized torrential rainfall can lead to the disconnection of mmWave links, because mmWaves are
attenuated by water. A routing control method that is based on the prediction of rain attenuation avoids
potential drops in the communication capacity of mmWave access networks caused by rainfall. When the
area of rain is advancing towards the mmWave access network, the routing control method predicts the
mmWave links that will be affected by the rainfall, and then selects alternative mmWave links to replace
them. A proportion of the network traffic is then passed to the selected links proactively to reduce the drops
of and ensure the capacity of the access network.

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