A method for multipoint data flow control, performed in a controller entity of a wireless communication system, comprises receiving of a data flow from a source flow queue. The data flow is split into split data flows, one for each of at least two wireless transmission points. Measures of timing skews for transmissions or quantities from which such timing skews can be deduced are received from each of the at least two transmission points. The data flow splitting is controlled in dependence of the timing skews. The split data flows are transmitted to the at least two wireless transmission points. A method for assisting in multipoint data flow control, network nodes configured for multipoint data flow control and assisting in multipoint data flow control, and computer programs therefore are also disclosed.