Abstract: A method of performing communication of a terminal includes the terminal transmitting state information thereof to a base station, and the terminal receiving a mode change request from the base station when the terminal is selected by the base station.

Abstract: A signaling method for a terminal that performs direct communication between terminals terminal is disclosed. A transmitting terminal transmits a link establishment request message for establishing a link to a receiving terminal, and the receiving terminal transmits a link establishment response message responding to this message to the transmitting terminal. The link establishment request message includes a field indicating a flow to use if the receiving terminal acquires a token.

Abstract: A permutated channel structure based on a block structure in talk-around direct communication is provided. A dedicated subchannel interferes with only one adjacent dedicated subchannel, even with a large synchronization error, by permutating the dedicated subchannels by cyclic shifts, whereby diversity gain can be maintained and interference between adjacent channels can be minimized.

Abstract: Upon receiving a multicast packet from a base station, a forwarding terminal connected to the base station establishes a multicast connection with at least one direct communication terminal having a direct communication group identifier mapped to a multicast IP address of the multicast packet, and transmits the multicast packet to the at least one direct communication terminal, thereby providing multicast services to a direct communication terminal not connected to the base station.

Abstract: A method of managing a resource is provided by a base station. The base station allocates a resource to a terminal, and generates a downlink control channel including information of the allocated resource and a transmission time of a next downlink control channel. Further, the base station transmits the downlink control channel to the terminal.

Abstract: Disclosed is an authentication method of a wireless mesh network capable of reducing overload and communication delay during authentication procedure by performing authentication between nodes without accessing an authentication server. The authentication method of a wireless mesh network according to an exemplary embodiment of the present disclosure includes: selecting, by a new node, a first neighbor node among one or more adjacent nodes; transmitting, by the new node, an authentication request message including a public key of the new node; authenticating, by the first neighbor node, the public key of the new node; transmitting, by the first neighbor node, an authentication response message including a public key of the first neighbor node to the new node; and authenticating, by the new node, the public key of the first neighbor node; transmitting, by the new node, an authentication identification message to the first neighbor node.

Abstract: A mobile relay station (RS) and a handover method thereof are provided. When it is determined that a mobile RS performs handover from a superordinate base station (BS) to a target BS, information indicating admission of handover is received from the superordinate BS. The mobile RS transmits a service unavailability section to a subordinate terminal, whereby the subordinate terminal is prevented from performing handover to a different BS or a different RS.

Abstract: A multimode apparatus and a communication method thereof are disclosed. If the multimode apparatus is chosen to serve as a relay station due to a base station having a backhaul link problem, it sets up a first relay link with a first base station. Upon receiving a request for releasing the first relay link from the first base station even though the backhaul link is not restored, the multimode apparatus sets up a second relay link with a second base station, or configures and operates a standalone network or an independent network.

Abstract: Provided is the broadcast service controlling apparatus and method. The broadcast service controlling method may perform grouping, into a broadcast group, broadcast services having the same transmission feature, may control scheduling information associated with the broadcast services included in the broadcast group and thus, may dynamically perform scheduling with respect to broadcast services.

Abstract: The present invention relates to a method of providing a multicast broadcast service. A message for providing an MBS (Multicast Broadcast Service) between network constituent elements is defined by applying a message defined in a wireless channel, and functions and parameters to be performed by the network constituent elements are defined. Therefore, the MBS can be provided in a wideband wireless access network that is a field of a mobile communication system and includes a wire channel.

Abstract: A direct communication method between terminals is provided. When a terminal receives a plurality of synchronization information parts, the terminal selects synchronization information to acquire a reference time among the plurality of synchronization information parts according to a priority. Here, the priority is an order of first synchronization information that is received from a base station, second synchronization information that is received from a global positioning system (GPS), and third synchronization information that is received from a terminal in which a hop count from the base station or the GPS is small.

Abstract: A method of managing a multicast service is provided to a mobile station. The mobile station receives from a base station a message including information on a multicast indication cycle including a multicast available interval and a multicast unavailable interval. The mobile station receives a multicast indicator in the multicast available interval of the multicast indication cycle, and receives a multicast traffic at a transmission time indicated by the multicast indicator.

Abstract: A method for communication of a terminal and a method for communication of a base station are disclosed. Communication between a first base station with a problem in a backbone and a second base station located beyond the coverage of the degraded base station and neighboring the first base station is relayed by a terminal. Accordingly, the first base station is able to continuously provide service to subordinate stations.

Abstract: A method for performing direct communication between terminals includes: a transmitting terminal's encrypting data using a direct communication transport encryption key (DTEK) for direct communication; and transmitting the encrypted data to a receiving terminal, wherein the DTEK is managed in an SA (security association) defined within the transmitting terminal or the receiving terminal.

Abstract: A method of performing communication of a terminal includes the terminal transmitting state information thereof to a base station, and the terminal receiving a mode change request from the base station when the terminal is selected by the base station.

Abstract: A method in which a first terminal supports direct communication using infracommunication includes setting at least one direct communication link with at least one second terminal, setting at least one traffic connection with a base station, and forwarding data that is transmitted through the at least one direct communication link from the at least one second terminal to the at least one traffic connection or forwarding data that is transmitted through the at least one traffic connection from the base station to the at least one direct communication link.

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: 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: 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 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.