METHOD OF DEVICE-TO-DEVICE COMMUNICATION AND METHOD OF CONTROLLING DEVICE-TO-DEVICE COMMUNICATION
First Claim
1. A Device-to-Device (D2D) communication method in which a first terminal within a first cell of a first base station directly communicates with a second terminal without relay of the first base station, the D2D communication method comprising:
- receiving a synchronization signal and a synchronization channel that are broadcasted through a downlink by the first base station;
acquiring synchronization for D2D communication using the synchronization signal and the synchronization channel;
transmitting first information for D2D communication to the first base station through a first data channel for cellular communication in order to request allocation of a first resource for D2D communication, when the first terminal is connected to the first base station;
receiving D2D control information comprising information about the first resource that is allocated to the first terminal from the first base station; and
broadcasting a second data channel for D2D communication using the D2D control information.
1 Assignment
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Accused Products
Abstract
A first terminal within a first cell of a first base station receives a synchronization signal and a synchronization channel that are broadcasted through a downlink by the first base station. The first terminal acquires synchronization for D2D communication using the synchronization signal and the synchronization channel. When the first terminal is connected to the first base station, in order to request allocation of a first resource for D2D communication, the first terminal transmits first information for D2D communication to the first base station through a first data channel for cellular communication. The first terminal receives D2D control information including information about the first resource that is allocated to the first terminal from the first base station. The first terminal broadcasts a second data channel for D2D communication using the D2D control information.
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Citations
20 Claims
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1. A Device-to-Device (D2D) communication method in which a first terminal within a first cell of a first base station directly communicates with a second terminal without relay of the first base station, the D2D communication method comprising:
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receiving a synchronization signal and a synchronization channel that are broadcasted through a downlink by the first base station; acquiring synchronization for D2D communication using the synchronization signal and the synchronization channel; transmitting first information for D2D communication to the first base station through a first data channel for cellular communication in order to request allocation of a first resource for D2D communication, when the first terminal is connected to the first base station; receiving D2D control information comprising information about the first resource that is allocated to the first terminal from the first base station; and broadcasting a second data channel for D2D communication using the D2D control information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method in which a first terminal controls Device-to-Device (D2D) communication between terminals, the method comprising:
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broadcasting a first synchronization signal and a first synchronization channel through an uplink, when the first terminal operates as a centralized control device that manages synchronization and a resource for D2D communication; receiving a first message that requests allocation of a first resource for D2D communication from a second terminal; and allocating the first resource to the second terminal, wherein the first synchronization channel comprises information about a first identifier of the first terminal and a type of the first synchronization signal. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A device-to-device (D2D) communication method in which a first terminal directly communicates with a second terminal without relay of a first base station, the D2D communication method comprising:
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receiving a first synchronization signal and a first synchronization channel from a third terminal operating as a centralized control device that manages synchronization and a resource for D2D communication, when the first terminal is located out of coverage of a first cell of the first base station; transmitting a Buffer Status Report (BSR) message to the third terminal through a request channel for requesting resource allocation, when receiving the first synchronization signal and the first synchronization channel; receiving information about a first resource that is allocated to the first terminal from the third terminal through a response channel; and broadcasting a first indicator channel comprising information on whether the first terminal transmits first data using the first resource. - View Dependent Claims (18, 19, 20)
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Specification