A terminal is disclosed that includes a receiver that performs, using a first time interval or a second time interval, a receiving process for downlink control information indicating a transmission direction per given time interval and a processor that determines the transmission direction based on the downlink control information. In other aspects, a radio communication method is also disclosed.

Embodiments of the present invention provide a nonlinear precoding bit loading method, a transmit end, a receive end, and a system. The method includes: determining, power control factors of multiple preset quantities of bits; obtaining, a first correspondence between the multiple preset quantities of bits and signal to noise ratios without power control; determining, a second correspondence between the multiple preset quantities of bits and signal to noise ratios with power control according to the power control factors and the first correspondence; and after actually measuring a signal to noise ratio with power control on a subcarrier, determining, according to the second correspondence, a preset quantity of bits corresponding to the actually measured signal to noise ratio with power control, using the determined preset quantity of bits as an actual bit loading quantity of the subcarrier, and notifying a transmit end of the actual bit loading quantity.

A method for calibrating a communication channel coupling first and second components includes transmitting a data signal from the first component to the second component on the communication channel, and sensing a characteristic, such as phase, of the data signal on the second component. Information about the sensed characteristic is fed back to the first component using an auxiliary channel. An adjustable parameter, such as phase, for the transmitter is adjusted on the first component in response to the information. Also, a characteristic of a data signal received from the transmitter on the second component is sensed and used to adjust an adjustable parameter for the receiver on the first component.

A wireless communications system that uses adaptive arrays is disclosed in which the capacity is optimized. A method for optimizing the capacity of a wireless communications system that uses adaptive arrays is also disclosed. The wireless communication system may be a point to multi-point (P2MP) and/or a multi-point to multi-point (MP2MP) STAP system.

A method of simultaneous bidirectional transmissions, the method comprising determining, by a network element, first transmission time slots for downlink and uplink transmissions for a first plurality of user equipment (UEs); assigning a DL transmission to a first shared time slot of the first transmission time slots for a first UE in the first plurality of UEs; and assigning an UL transmission to the first shared time slot for a second UE in the first plurality of UEs, wherein the first and second UEs form a virtual UE to communicate in virtual full duplex in at least the first shared time slot.

The invention relates to a method for dynamically indicating a TDD re-configuration to the mobile station by encoding the dynamic TDD re-configuration indication into the DCI or CRC calculated for the DCI. In one embodiment, the TDD configuration indication is implicitly encoded as an RNTI into the CRC, when scrambling the CRC for the DCI with a TDD-RNTI. In another embodiment, the TDD configuration indication is part of the DCI payload, while the CRC for the DCI is scrambled with a cell identifier, identifying the target cell for which the dynamic TDD re-configuration is to be applied. In still another embodiment, the TDD configuration indication is part of the DCI payload, where the DCI payload further includes an invalid parameter indicating to the mobile station that the DCI carries the TDD configuration indication.

A cellular communication system comprises a first base station serving at least a first user equipment. The base station comprises functionality for transmitting a base station duplex capability message to user equipments using a transmission format which is common to a plurality of duplex modes. A first user equipment comprises a transceiver which receives the base station duplex capability message. A RACH characteristics processor determines at least one transmit characteristic for an access message in response to the base station duplex capability message and a RACH transmit controller controls the transmission of an access message to the first base station in response to the at least one transmit characteristic.

Coordination information for controlling base-station-to-base-station interference is transmitted from one radio network node (900) (e.g., an LTE eNodeB) to another, using certain parts of the TDD subframe. One example method, as might be implemented in a radio network node (900) such as an LTE eNodeB, includes the generating (1010) of a TDD coordination signal and the transmitting (1020) of the TDD coordination signal to one or more other radio network nodes. In some embodiments, the coordination signal is transmitted in a guard period of a special subframe at the target node. In others, the coordination signal is transmitted in another interval during which the receiving node is not transmitting, such as in uplink subframe for the receiving node, an uplink portion of a special subframe at the receiving node, or in a downlink subframe or downlink portion of a special subframe during which the receiving node is not transmitting.

There is provided a method performed by a wireless node for determining when to use full duplex in the wireless node for communicating in a wireless communication network. The method comprises the step of estimating an influence on neighbouring wireless nodes of using full duplex in the wireless node. The method further comprises the step of deciding whether to use full duplex in the wireless node or not, based on the estimated influence.

A configuration to allow a wireless device having one or more TRPs to configure the one or more TRPs based on configurations of other wireless devices. The apparatus detects a second wireless device in a vicinity of a first wireless device. The apparatus determines a duplex configuration of the second wireless device. The apparatus enables a duplex configuration of the first wireless device to correspond with the duplex configuration of the second wireless device. The apparatus communicates with the second wireless device based on the duplex configuration.