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The model that fast radio bursts are caused by plunges of asteroids ontoneutron stars can explain both repetitive and non-repetitive bursts. If aneutron star passes through an asteroid belt around another star, there wouldbe a series of bursts caused by series of asteroid impacts. Moreover, theneutron star would cross the same belt repetitively if it is in a binary withthe star hosting the asteroid belt, leading to a repeated series of bursts. Iexplore the properties of neutron star binaries which could lead to the onlyknown repetitive fast radio burst so far (FRB121102). In this model, the nexttwo epochs of bursts are expected around 27-February-2017 and 18-December-2017.  On the other hand, if the asteroid belt is located around the neutron staritself, then a chance fall of an asteroid from that belt onto the neutron starwould lead to a non-repetitive burst. Even a neutron star grazing an asteroidbelt can lead to a non-repetitive burst caused by just one asteroid plungeduring the grazing. This is possible even when the neutron star is in a binarywith the asteroid hosting star, if the belt and the neutron star orbit arenon-coplanar.

A Unified Model for Repeating and Non-repeating Fast Radio Bursts