In M2M communication, data transmission is performed 4 msec after control information for dynamic scheduling is received from a base station apparatus, and the data transmission that needs immediacy has more overhead. In a case where a transmission apparatus performs data transmission to a reception apparatus, there are a first transmission mode in which a data signal based on a transmission parameter included in the received control information is transmitted, and a second transmission mode in which the control signal information is not received, and the data signal is transmitted without the reception apparatus being notified of a transmission timing of the data signal. In a case where transmission of an SR is possible and in a case where data communication is possible with the first transmission mode and the second transmission mode, the transmission apparatus configures different transmission powers in accordance with the transmission modes.

A narrow-bandwidth terminal device performs radio communication at a bandwidth narrower than a system bandwidth. The narrow-bandwidth terminal device in an idle state camps on a cell, and performs discontinuous reception of a signal transmitted from the cell. The terminal device also determines a reception condition of the signal, for example, whether the signal can be received. When it is determined that the signal cannot be received, the narrow-bandwidth terminal device moves out of a coverage area of the cell while continuing to perform the discontinuous reception. When it is determined that a discontinuous reception timer has been completed, the narrow-bandwidth terminal device continues to perform the discontinuous reception.

Provided are an eNodeB (eNB) and a user equipment (UE) in a wireless communication system supporting a machine type communication (MTC). The present invention comprises: receiving a first message including a UE-specific configuration on the basis of a common configuration for a plurality of UEs; and receiving a second message according to the UE-specific configuration, wherein the common configuration may include at least one of the number of times of repetition of the first message and a rate matching pattern of the first message.

The present invention is designed so that broadcast information is transmitted and received adequately even when the bandwidth to use is limited to partial reduced bandwidths in a system bandwidth and the broadcast information is transmitted and received in repetitions over multiple subframes. A user terminal, in which the bandwidth to use is limited to a partial reduced bandwidth in a system bandwidth, has a receiving section that receives first system information and second system information, and a control section that acquires transmission information, which includes the repetition factor for the second system information, from the first system information, and the receiving section receives the second system information based on the transmission information.

A method and apparatus for performing a device-to-device (D2D) operation in a wireless communication system is provided. In one embodiment, a user equipment (UE) receives a configuration of a reference timing for a cell of first carrier, based on a timing of a primary cell (PCell) of a second carrier, and performs D2D operation with another UE on the cell of the first carrier according to the reference timing. In another embodiment, a UE allocates a D2D transmission power based on an uplink (UL) transmission power for dual connectivity, and performs D2D operation with another UE according to the D2D transmission power.

Provided are methods for repeatedly transceiving a common control message for a machine-type communication (MTC) terminal in a wireless access system supporting MTC, and apparatuses supporting the methods. A method for receiving a common control message for an MTC terminal in a wireless access system supporting MTC according to one embodiment of the present invention may comprise the steps of: receiving a channel status information reference signal (CSI-RS); and receiving a common control message from a subframe in which the CSI-RS is received. Here, the common control message can be configured so as to be repeatedly transmitted from a previously configured number of subframes comprising the subframe.

A communication timing control method for a communication service system provided with wireless communication devices, a wireless network, and an upper server groups the wireless communication devices using device information including characteristics of a service provided to the wireless communication devices entering the communication service system via the wireless network, characteristics of communication data handled in an execution application for receiving the provided service, and transfer characteristics of the wireless communication devices receiving the provided service. Next, a group-specific communication timing is determined for the grouped wireless communication devices. Next, communication is performed on the basis of the determined communication timing.

A method and apparatus for transmitting a control signal or data for a low cost user equipment (UE) in a wireless communication system is provided. A base station transmits information on frequency hopping for the low cost UE, and transmits the control signal or data to the low cost UE according to the information on frequency hopping.

An eNodeB (eNB), user equipment (UE) and method of providing a flexible Radio Access Technology (FRAT) are generally described. The information (resource allocation, partition information and numerology) of at least one of a plurality of RATs used by the eNB is provided to a UE. Each RAT has a flexible subcarrier spacing and symbol duration, which are integer multiples of a base subcarrier spacing and symbol duration, and is associated with at least one of different temporal and frequency resources. The symbol and/or frame structure of each RAT are independent. A Transmission Time Interval (TTI) boundary between the RATs is common, and the RATs comprise a common reference TTI duration. The information of the RATs is provided either via a different RAT than the RAT used by the UE for communication or via a dedicated carrier in the RAT used by the UE for communication.

Embodiments of the present disclosure provide a device to device (D2D) communication method and apparatus, to resolve at least a problem of a low success rate of discovery between user equipments in the prior art. The method includes: determining, by a first user equipment (UE), first signaling to be sent, where the first signaling includes one or a combination of the following information: a transmission probability, a quantity of retransmission times, a transmission period, a type of a cyclic prefix (CP), a transmit power, a current quantity of hops, a quantity of antenna ports, a transmission mode, a bandwidth of a D2D link, a D2D link frame number, time division duplexing (TDD) uplink and downlink configuration information, or information indicating whether the first UE is within a network; and sending, by the first UE, the first signaling to second UE using the D2D link.