We present data on the monitoring of the Galactic X-ray transient GRS
1915 + 105 at 15 GHz with the Ryle Telescope. We have found quasi-peri
odic oscillations with periods in the range 20-40 min, which are tenta
tively associated with the soft-X-ray variations on the same time-scal
e. The overall behaviour of the radio emission is shown to vary in a s
trong association with the X-ray emission as recorded by the RXTE all-
sky monitor.