Abstract: The present invention relates to a femtocell search method for a handover from a macrocell to a femtocell. The present invention relates to a method for a terminal that accesses a macrocell to search a femtocell in an environment where a plurality of femtocells are overlapped in one macrocell. The terminal searches a femtocell by using a dummy preamble in order to minimize the size of neighbor cell lists broadcasted from the macrocell to the terminal. Therefore, according to the present invention, an MAC overhead can be minimized by eliminating neighbor femtocell lists in a mobile neighbor advertisement (MOB_NBR_ADV) message broadcasted from the macrocell, and the terminal can search a femtocell with a minimum scanning load by checking only a femtocell dummy preamble in a dedicated symbol of the macrocell.

Abstract: Disclosed is a method for a first terminal to perform direct communication between terminals, the method including performing direct communication with at least one second terminal by using resources allocated for direct communication between terminals, the resources including a synchronization channel used for frequency synchronization and time synchronization between terminals, and the synchronization channel including a synchronization channel preamble used for at least one of preamble detection, time offset estimation, frequency offset estimation, and channel estimation.

Abstract: When MBS information is updated, a base station transmits a first message to a terminal. The first message includes a service flow update indicator for indicating a scheme for describing a current MBS identifier (ID) and flow ID to be updated, information on the current MBS ID and flow ID described by the scheme indicated by the service flow update indicator, and new MBS information. The terminal transmits a second message to the base station in response to the first message.

Abstract: A method for communication of a base station includes: receiving first data from a first terminal; transmitting the first data to a second terminal by local forwarding without passing through an access service network (ASN); receiving second data from the second terminal; and transmitting the second data to the first terminal without passing through the ASN.

Abstract: The present invention relates to a communication method of a base station, which includes the base station including an indication of whether the base station is a terminal acting as a base station or a base station acting as a relay station in an SCD message or DCD message, and transmitting the SCD message or the DCD message to a terminal.

Abstract: Method receiving Multicast Broadcast Service (MBS) in a wireless communication system is provided. The method comprises receiving a Dynamic Service Addition (DSA) message through a primary carrier, from a Base Station (BS); switching from the primary carrier to a secondary carrier based on the DSA message; receiving an MBS Configuration message through the secondary carrier, from the BS; and receiving MBS data through the secondary carrier based on the MBS Configuration message, from the BS.

Abstract: A method of relaying in a base station (BS) includes: setting, when a backhaul link of a first BS is damaged, a relay link using a second BS, which is an adjacent BS of the first BS as a serving BS; and releasing the relay link after the backhaul link is recovered.

Abstract: In a method of managing a multicast service, a mobile station receives a message including multicast service flow update information from a base station that belongs to a multicast group zone including a base station set having at least one base station. The mobile station updates a parameter associated with a multicast service flow of the multicast service based on the multicast service flow update information. The multicast service flow update information includes a new multicast group zone ID, current multicast service identification information, and new multicast service identification information mapped to the current multicast service identification information.

Abstract: A first terminal for performing direct communication between terminals includes: a radio frequency (RF) unit; and a processor, the processor being adapted to perform direct communication with at least one second terminal by using resources allocated for direct communication between terminals, wherein the resources are divided into a first slot region and a second slot region, the first slot region including a synchronization channel containing synchronization information for direct communication between terminals, a dedicated channel for transmitting direct communication data between terminals, and a supplementary channel one-to-one mapped with the dedicated channel, and the second slot region including the dedicated channel and the supplementary channel.

Abstract: In a method of transmitting broadcasting information, the broadcasting information is classified into fixed broadcasting information for transmitting to a fixed position of a super-frame and variable broadcasting information to be variably transmitted in the form of a broadcasting message. The fixed broadcasting information may be classified into primary broadcasting information having a short cycle and secondary broadcasting information having a long cycle.

Abstract: A signaling method of a first terminal for direct communication between terminals includes transmitting a link establishment request message for establishing a direct communication link including flow information to a second terminal, receiving a link establishment response message for establishing a direct communication link including flow information from the second terminal, and establishing a direct communication link between the first terminal and the second terminal.

Abstract: A method of configuring a cell of a terminal includes: transmitting, by the terminal, when the terminal searches for an idle band, a downlink frame; performing a network entry procedure with other terminals at 1 hop from the terminal; and optimizing, by the terminal, transmission power.

Abstract: The present invention relates to a resource allocation and data receiving method. A resource allocation message for allocating a resource for an uplink dedicated channel is transmitted to a relay station, a receipt check message on the resource allocation message is received from the relay station, and successful resource allocation is checked.

Abstract: A method of relaying in a base station that enable a first base station to operate as a relay station in order to communicate with a second base station that is connected to backhaul, the method includes: forming, by the first base station, a relay link with the second base station; and starting, by the first base station, a relay mode.

Abstract: A method for performing direct communication, by a first terminal, between terminals, includes transmitting a control message for a direct communication resource allocation to at least one second terminal through a first region included in a direct communication resource, transmitting synchronization information to at least one second terminal through a second region included in the direct communication resource, and transmitting a data packet to at least one second terminal through a third region included in the direct communication resource.

Abstract: A method of establishing a multicast connection is provided. A mobile station transmits a registration request message for a discovery of a multicast service to the base station, and receives a registration response message from the base station in response to the registration request message. The mobile station exchanges a DSA request message and a DSA response message to the DSA request message with the base station, for a multicast connection on the multicast service. The mobile station receives a downlink control channel including allocation information of multicast resource from the base station.

Abstract: A method of supporting a security for a multicast communication is provided in a mobile station. The mobile station shares an MAK with a base station, derives a prekey based on a first parameter including the MAK, and derives a multicast security key including an MTEK based on a second parameter including the prekey, and decrypts a multicast traffic using the multicast security key.

Abstract: A method of allocating a multicast resource to a multicast group for a multicast communication in a base station is provided. The base station persistently allocates the multicast resource to the multicast group, generates a MAP IE including allocation information of the multicast resource, an allocation period indicating a period in which the multicast resource is allocated and a lifetime in which allocation of the multicast resource is maintained, and transmitting the MAP IE to the multicast group.

Abstract: When an event associated with a mobile station occurs, a relay station requests a base station to allocate a dedicated control channel required for transmitting control information on the mobile station to the base station. Next, when the control information on the mobile station is generated, the relay station transmits the control information to the base station through the dedicated control channel. Accordingly, since the base station allocates the dedicated control channel to the relay station in advance before the control information is generated in the relay station, the relay station can transmit the control information to the base station with a minimum of time delay.

Abstract: A method of setting a cycle of a low-duty mode in a femto base station is provided. The cycle of the low-duty mode has a pattern in which an available interval and an unavailable interval repeatedly appear, and the available interval is set to include a paging listening interval of a paging cycle. A method of setting a cycle of a low-duty mode in a femto base station having a service area overlapping with that of a macrocell is provided. An unavailable interval is set by taking the overlapping degree of the service area of the femto base station with the macrocell into consideration. A method of setting a cycle of a low-duty mode in a plurality of femto base stations operated in the low-duty mode is provided. The same cycle can be set for a plurality of base stations.