Method and apparatus for cross-subframe interference coordination
AssigneeNEC (China) Co., Ltd.
InventorsDalin Zhu, Ming Lei
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Abstract
Embodiments of the disclosure provide a method and apparatus for cross-subframe interference coordination in a dynamic TDD system. The method comprises steps of: obtaining UL-DL configurations employed by a plurality of cells in the dynamic TDD system; and determining, based on the UL-DL configurations, a beamforming vector of at least one interfering cell which has cross-subframe interference on at least one interfered cell, so as to reduce the cross-subframe interference.
Claims18
A method for cross-subframe interference coordination in a dynamic Time Division Duplex (TDD) system, comprising:
- obtaining uplink (UL)-downlink (DL) configurations employed by a plurality of cells in the dynamic TDD system;
- and
- determining a beamforming vector of at least one interfering cell of the plurality of cells which has cross-subframe interference on at least one interfered cell of the plurality of cells, based on the UL-DL configurations and uplink capacity of the at least one interfered cell, so as to reduce the cross-subframe interference,
- wherein determining a beamforming vector of the at least one interfering cell which has cross-subframe interference on the at least one interfered cell comprises:
- determining the at least one interfering cell and the at least one interfered cell from the plurality of cells based on the UL-DL configurations;
- dividing UEs in the at least one interfering cell and the at least one interfered cell into one or more UE groups, wherein a UE group at least includes a UE in the at least one interfering cell and a UE in the at least one interfered cell;
- calculating one or more beamforming vectors associated with the one or more UE groups;
- and
- selecting, from the one or more beamforming vectors, a beamforming vector maximizing the uplink capacity of the at least one interfered cell.
An apparatus for cross-subframe interference coordination in a dynamic Time Division Duplex (TDD) system, comprising:
- a processor;
- and
- a memory storing instructions executable by the processor,
- wherein the processor is configured to obtain uplink (UL)-downlink (DL) configurations employed by a plurality of cells in the dynamic TDD system and
- to determine a beamforming vector of at least one interfering cell of the plurality of cells which has cross-subframe interference on at least one interfered cell of the plurality of cells, based on the UL-DL, configurations and uplink capacity of the at least one interfered cell, so as to reduce the cross-subframe interference,
- wherein the processor is further configured to determine the at least one interfering cell and the at least one interfered cell from the plurality of cells based on the UL-DL configurations,
- to divide UEs in the at least one interfering cell and the at least one interfered cell into one or more UE groups, a UE group at least including a UE in the at least one interfering cell and a UE in the at least one interfered cell,
- to calculate one or more beamforming vectors associated with the one or more UE groups and
- to select, from the one or more beamforming vectors, a beamforming vector maximizing the uplink capacity of the at least one interfered cell.
Dependencies are inferred from the claim text.