Patent ID: 8488483

Claim:
A method in a radio base station of assisting one or more neighbour radio base stations in UL signal reception, the method comprising the steps of: serving a first group of UE with communication over a frequency carrier; controlling timing of signal transmission from the first group of UE to be aligned at arrival at the radio base station, by sending a time alignment value to any UE in the first group whose signal is misaligned at arrival; Fourier processing time domain signal samples of the frequency carrier, with timing of the Fourier processing adjusted to the timing of arrival of signals from the first group of UE, and thereby producing Fourier processed samples relating to the first group of UE; receiving a request from one of said neighbour base stations to provide Fourier processed signal information, relating to a second group of one or more UE that is/are served by the requesting neighbour base station wherein the signal/s from the second group of UE arrive/s at the radio base station non-aligned with the signal/s of the first group of UE; Fourier processing time domain signal samples of the frequency carrier with timing adjusted to the arrival of signal/s from the second group UE, thereby producing Fourier processed signal information relating to the second group UE; and sending the Fourier processed signal information that relates to the second group UE to the requesting neighbour radio base station.