Dynamic cell mode indication and reporting channel state information for dormant cells in a dual connectivity carrier aggregation environment. UEs may be configured for carrier aggregation of cells associated with non-collocated eNBs, which may include a master eNB (MeNB) and one or more secondary eNBs (SeNB), each supporting multiple carrier frequencies. Indicators of cell mode for secondary cells of the MeNB or SeNB are periodically sent using a broadcast mechanism and may configure active or dormant sub-periods within the indicated periods. The indicators may be transmitted by a primary cell for the MeNB or special secondary cell for the SeNB. Alternatively, the indicators may be transmitted by the secondary cell. When CSI measurements occur for a dormant cell, the UE may report CSI for the dormant periods, suppress CSI reporting for the dormant periods, or report some types of CSI and not others for the dormant periods.

Cell on-off procedure for dual connectivity

Methodsof operating a first base station in a radio access network including a plurality of base stationsmay be provided. For example, acell configuration change indicatormay be transmittedfrom the first base station to a second base station responsive to receivinga Radio Link Failure(RLF)Report at the first base station from a wireless terminal or responsive to receivinga Radio Link Failure Indication message from a third base station.

Methods of operating radio access network base stations and related network nodes

The present invention enables communication using an Scell in a suitable manner during an inter-site CA, even when the wireless base station transmitting an "activate command" is different from the wireless base station managing the Scell. A wireless base station (eNB#1) according to the present invention is provided with a transmitting unit (12) that is configured so as to report, to a wireless base station (eNB#10), the activation of a cell (#B) after transmitting an "activate command", which is a command to activate the cell (#B), to a mobile station (UE).

Radio base station and mobile station

A method and apparatus for transmitting an indication in a wireless communication system is provided. A user equipment (UE) receives an indication, which indicates whether a cell served by an eNodeB (eNB) is a normal cell or a split cell, from the eNB, and transmits the received indication to a serving eNB of the UE.

Method and apparatus for transmitting indication in wireless communication system

A method for component carrier configuration is provided. The method includes: generating, by a Base Station (BS), secondary cell (SCell) configuration information and transmitting it to a User Equipment (UE); transmitting, by the BS, an SCell activation request for the UE to a micro BS and receiving from the micro BS an SCell activation response to the SCell activation request; and transmitting, by the BS, SCell activation information to the UE if the received SCell activation response indicates that the SCell activation request is accepted by the micro BS. The SCell configuration information contains group numbers and indices of SCells associated with the BS and the micro BS, respectively, and indicates a secondary primary cell (S-PCell) associated with the micro BS. The present invention also provides a BS and a UE. With the method for component carrier configuration and the corresponding BS and UE according to the present invention, the channel state information of the UE can be fed back on an uplink working carrier of the micro cell base station.

Method for component carrier configuration, base station and user equipment

A method includes sending a message from a first cell to a second cell comprising an instruction the second cell should enter a non-energy savings mode. The sending is responsive to a detection of one or more RF coverage problems for user equipment in a coverage area of the first cell. The second cell can provide RF coverage for part of a coverage area of the first cell. Another method includes receiving a message at a cell that is in an energy savings mode. The message includes instruction(s) the cell should activate itself and the cell is to deactivate its ability to automatically enter the energy savings mode. The second cell transitions to an active mode and deactivates its ability to automatically enter the energy savings mode. In another method, a cell makes a determination a discontinuous carrier activation mode is to be entered and enters the mode.

Base station power savings and control thereof

Mode control in wireless communications

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Base station power savings and control thereof

Mode control in wireless communications