Abstract: A method in a first node (610, 615) is disclosed. The method comprises determining (704) a time resource over which the first node transmits a signal to a second node (610, 615). The method comprises signaling (708), to at least one of the second node or a third node (610, 615), information about one or more transient time parameters associated with the time resource, wherein the one or more transient time parameters are used by the first node for transmitting the signal to the second node during the time resource. The method comprises adapting (712) a transmitter configuration of the first node for transmitting the signal to the second node based on one of the one or more transient time parameters.

Abstract: The invention discloses a beamforming method for polarized antenna array consisting of a plurality of antenna elements, applied to single layer beamforming or dual layer beamforming, which includes the steps: determining (201) first beamforming weights for phase compensation among the antenna elements within each polarization direction; determining (202) second beamforming weights for phase compensation between equivalent channels of two polarization directions; and calculating (203) hybrid beamforming weights as product of the first beamforming weights and the second beamforming weights. A beamforming apparatus for polarized antenna array is also provided in the invention as well as a radio communication device and a system thereof With the invention, the single-layer and dual-layer beamforming weights are determined for the cross-polarized antenna array without requiring full channel knowledge or the aid of PMI. Computation complexity is lowered and full power amplifier utilization can be achieved.

Abstract: A method for selecting carrier aggregation (CA) configurations includes determining whether a first wireless device is operating or expected to operate using a single carrier configuration on a cell associated with a first frequency band. If the first wireless device is not operating or expected to operate using a single carrier configuration on a cell associated with a first frequency band, a first CA configuration is selected for a second wireless device. If the first wireless device is operating or expected to operate using a single carrier configuration on a cell associated with a first frequency band, a second CA configuration that is more restrictive than the first CA configuration is selected for the second wireless device. An identifier of the selected one of the first CA configuration or the second configuration is transmitted to the second wireless device.