Patent ID: 9198187
Filing Date: 2015-11-24
Classification: H04J,H04L,H04W

Abstract:
1. A method to minimize inter-cell interference in an Orthogonal Frequency Division Multiple Access (OFDMA) network, wherein a user device detects interferences of a single dominant interferer of a neighbour base station, said user device provided with at least two antennas and said user device connected to a main base station, said main base station introducing a pattern of transmission gaps for certain Resource Elements in the Resource Element mapping function by switching off the transmission characterised in that said certain Resource Elements in the Resource Element mapping function are introduced for the PDSCH complex symbols, the method comprising performing the following steps: employing, said neighbour base station and said main base station, transmission modes TM1 or TM7 for at least said certain Resource Elements; coordinating base stations that constitute said OFDMA network in order to allow the transmission in said certain Resource Elements only to said neighbour base station and to said main base station; receiving in said user equipment the signals by said at least two antennas in said certain resource elements corresponding to the following expression: where r i is said single dominant interferer; n h calculating in said user equipment the signal received to at least partially cancel said single dominant interferer according to the following expression: where r′ is the signal received by said user equipment to at least partially cancel said single dominant interferer; s is the signal sent from said main base station to said user equipment; n′ is a noise term combination of the noise signals received by said at least two antennas of said user equipment; h h