In order that a user terminal properly identifies a connection cell in a radio communication system (LTE-U) for operating LTE in an unlicensed band, a user terminal for communicating with a radio base station in an unlicensed band is provided with a detection section that detects a synchronization signal transmitted from a radio base station using a dummy cell ID used in common among a plurality of radio base stations, an estimation section that performs channel estimation using a reference signal, and a reception processing section that performs reception processing of system information transmitted from a radio base station using a channel estimation result.

User terminal, wireless base station, and wireless communication method

A terminal device for communicating with a base station device, the terminal device comprising: a reception unit which receives, via higher layer signaling, first information relating to the setting of enhanced Interference Management and Traffic Adaptation (eIMTA), and second information relating to Channel State Information (CSI) subframe sets; and a transmission unit which, if, in the second information, a first CSI subframe set and a second CSI subframe set have been set, considers the relative priority of the subframe sets and drops the CSI report using a Physical Uplink Control Channel (PUCCH).

Terminal device, base station device, and method

A plurality of cells are grouped into a primary cell group and a secondary cell group. The wireless device receives a timing advance command comprising a time adjustment value and an index of the secondary cell group. The wireless device applies the time adjustment value to uplink transmission timing of the secondary cell group. The wireless device triggers an action when the difference between primary cell group timing and secondary cell group timing is greater than a value.

Cell Timing in a Wireless Device and Base Station

Technology for periodic channel state information (CSI) reporting in a coordinated multipoint (CoMP) scenario is disclosed. One method can include a user equipment (UE) generating a plurality of CSI reports for transmission in a subframe for a plurality of CSI processes. Each CSI report can correspond to a CSI process with a CSIProcessIndex. The UE can drop CSI reports corresponding to CSI processes except a CSI process with a lowest CSIProcessIndex. The UE can transmit at least one CSI report for the CSI process to an evolved Node B (eNB).

Periodic channel state information reporting for coordinated multipoint (comp) systems

A terminal device configured to communicate with a base station device using one cell. The terminal device is configured to: set transmission power for transmission of a physical uplink shared channel on a subframe belonging to a first subframe set, based on a first parameter relating to power control adjustment; set transmission power for the physical uplink shared channel on a subframe belonging to a second subframe set, based on a second parameter relating to the power control adjustment; and calculate a value of the first parameter by accumulating a correction value indicated by a transmit power control command corresponding to the first subframe set, in a case that accumulation is enabled; calculate a value of the second parameter by accumulating the correction value indicated by the transmit power control command corresponding to the second subframe set, in a case that accumulation is enabled. Thus, the base station device and the terminal device can efficiently perform the transmit power control.

Terminal device, method, and integrated circuit

A wireless device transmits a first packet in subframe n of a first cell of a first cell group and transmits a second packet in subframe n+1 of a second cell of a second cell group overlapping in time with the transmission of the first packet. The wireless device reduces a subframe transmission power of at least one of the first packet and the second packet if a power parameter is more than an allowable transmission power. A calculation for the power parameter considers transmission power of the first packet and the second packet according to a pre-configured rule.

Wireless Device Transmission Power

A wireless device transmits a first signal in a first cell group and transmits a second signal in a second cell group. The wireless device adjusts a signal transmission power of one of the first signal and the second signal if a power value exceeds an allowable transmission power and if an overlapping in time exceeds a first duration.

Esmael Hejazi Dinan

Papers

Wireless Device Transmission Power

Signal transmission power adjustment in a wireless device