Patent ID: 9071290
Filing Date: 2015-06-30
Classification: H04B

Abstract:
1. A method for Coordinated MultiPoint (COMP) operation for a supporting radio base station cooperating with a serving radio base station in a cellular communication network, said method comprising: said supporting radio base station extracting, in a selected subset of an available frequency band, a limited set of In-phase and Quadrature-phase (IQ) samples for use as complementary IQ samples, based on received radio signals including a radio signal originating from an uplink transmission of at least one user equipment (UE) served by said serving radio base station; and said supporting radio base station transmitting said complementary IQ samples extracted in the selected subset of the available frequency band to said serving radio base station to schedule a user equipment, having problems with the uplink, on the selected subset of the frequency band and decode user data of said uplink transmission based on said complementary IQ samples together with own IQ samples provided by said serving radio base station, wherein the selected subset is less than an entirety of the available frequency band available for use by the serving radio base station, wherein the step of transmitting the complementary IQ samples comprises said supporting radio base station transmitting, via a network interface to a transport network, said complementary IQ samples to a multicast group that includes said serving radio base station, and wherein said complementary IQ samples extracted at said supporting radio base station in said subset of the available frequency band and/or from a subset of the available antennas are associated with the said multicast group.