  We report the results of 3 observations of GRS 1915+105 during which the
source is found to show the X-ray dips/spike sequences (cycles). These
observations were performed simultaneously with \integral, RXTE, the Ryle and
Nancay radio telescopes. They show the so-called $\nu$, $\lambda$ and $\beta$
classes of variability during which a high level of correlated X-ray and radio
variability is observed. We study the connection between the accretion
processes seen in the X-ray behaviour, and the ejections seen in radio. By
observing ejection during class $\lambda$, we generalise the fact that the
discrete ejections in GRS 1915+105 occur after the cycles seen at X-ray
energies, and identify the most likely trigger of the ejection through a
spectral approach to our INTEGRAL data. We show that each ejection is very
probably the result of the ejection of a Comptonising medium responsible for
the hard X-ray emission seen above 15 keV with INTEGRAL. We study the rapid
variability of the source, and observe the presence of Low Frequency Quasi
Periodic Oscillations during the X-ray dips. The ubiquity of the former
behaviour, and the following ejection may suggest a link between the QPO and
the mechanism responsible for the ejection.
