Abstract:
The present invention relates to a method for performing a D2D discovery and a terminal using the same. Particularly, the present invention relates to a method for performing a D2D discovery, which compares a congestion level of another discovery slot selected randomly or according to a preset pattern with a threshold or a congestion level of a current discovery slot and determines a discovery slot to transmit a discovery message and a transmission period of the discovery message according to a result of the comparison, and a terminal using the same. The present invention relates to a method for performing a D2D discovery using discovery resources including a plurality of discovery slots, and a terminal performing the same, the method comprising the steps of: broadcasting a discovery message by using a first discovery slot; comparing a congestion level of a selected second discovery slot with a predetermined congestion level value; determining a discovery slot to broadcast the discovery message on the basis of a result of the comparison; and broadcasting the discovery message by using the determined discovery slot.
Abstract:
A terminal synchronization method and apparatus for use in a wireless communication system are provided. A synchronization method includes configuring, at the terminal, a synchronization signal reference time depending on whether a synchronization signal is received in an initial observation period as long as at least two frames, monitoring to receive the synchronization signal in an alternation period of a transmission period and a reception period, the alternation period following the initial observation period, updating the reference time depending on whether the synchronization signal is received in the reception period, transmitting the synchronization signal at the updated reference time in the transmission period, and updating the reference time depending on whether the synchronization signal is received in a dedicated observation period following the alternation period. The synchronization apparatus and method are advantageous in that synchronization is obtained without assistance of a base station, an Access Point (AP), etc.
Abstract:
An electronic device is provided. The electronic device includes a first electromagnet mounted to a side surface of the electronic device and configured to generate a magnetic force, a data channel terminal configured to transmit and receive a signal for detecting whether another electronic device is attached, and a processor configured to determine at least one of a polarity and a strength of the magnetic force of the first electromagnet for an attachment or detachment between the electronic device and the other electronic device, control the first electromagnet according to at least one of the determined polarity and strength, and detect an attachment or detachment state between the electronic device and the other electronic device.
Abstract:
A method of performing pairing by a transmission terminal in device to device communication is provided. The method includes classifying a plurality of link identifications for identifying a data transmission and reception channel a seed of at least one link identification; selecting an available candidate link identification seed among the seed of the at least one link identification, transmitting a pairing request message including seed information associated with the selected available candidate link identification seed, and receiving a pairing response message corresponding to the pairing request message. When allocating a connection ID in a device to device communication environment, even if a small number of devices exist, an overhead for searching for the connection ID is not great. Further, when many devices exist within a specific range, a probability of devices having the same connection ID is reduced. Accordingly, the device to device communication can be easily performed.
Abstract:
A 5th generation (5G) or pre-5G communication system for supporting a higher data transfer rate than a 4th generation (4G) communication system such as long term evolution (LTE) is provided. An electronic device may include a processor and a communication interface operatively coupled to the processor for transmitting and receiving a message. The processor can transmit a first message to a first electronic device using a proximity communication for communication with a second electronic device, and the first message can include information enabling the first electronic device to communicate with the second electronic device on behalf of the electronic device.
Abstract:
The present invention relates to a device-to-device (D2D) communication method and an apparatus therefor. A device-to-device communication method according to an embodiment of the present invention may comprise the steps of: transmitting, to a base station, a device-to-device communication registration request message including identification information and interest information of a device-to-device communication service; receiving, from the base station, a device-to-device communication registration response message including device-to-device communication resource information which has been allocated according to the identification information of the device-to-device communication service; and transmitting a device-to-device communication signal using the allocated device-to-device communication resource. According to an embodiment of the present invention, it is possible to ensure a QoS differentiated according to the service of an application which is used by various users, perform a device-to-device communication process which is independent of a data communication, and conduct interference management under simultaneous connection with a cellular user.
Abstract:
A Lawful Interception (LI) method performed between a network and a terminal operating in Device-to-Device (D2D) communication mode to intercept D2D communication content are provided. The lawful interception method includes a D2D communication terminal according to the present disclosure includes activating a lawful interception function, storing information exchanged with a peer terminal through D2D communication, and transmitting a lawful interception report including the stored information.
Abstract:
A method and apparatus for exchanging information between devices for use in the pairing process for Device To Device (D2D) communication is provided. A signal transmission/reception method of a device in a mobile communication system includes determining a resource for the device to transmit a pairing signal, transmitting a discovery signal including information on the determined resource, pairing with a neighbor device that received the discovery signal through the resource indicated by the resource information, and communicating data signals with the paired neighbor device. The information exchange method and apparatus for D2D communication is capable of preventing a plurality of devices from attempting pairing on the same frequency simultaneously, thereby improving pairing efficiency and reducing power consumption of the device.
Abstract:
A network-assisted discovery method and apparatus for facilitating Device to Device (D2D) communication in the wireless communication system is provided. The network-assisted discovery method of a terminal in a wireless communication system, the method comprising, broadcasting a discovery signal information in a discovery signal transmission duration of the terminal, receiving assisted discovery information from a base station, determining whether the assisted discovery information comprises the discovery information of the terminal and determining whether to transmit a discovery transmission request message to the base station based on the result of the determination. The network-assisted discovery method and apparatus of the present disclosure is capable of mitigating the problems caused by resource collision and reducing power consumption of the device in the D2D wireless communication system.
Abstract:
A link scheduling apparatus and method based on inter-link interference information sharing technique for use in a Device to Device (D2D) communication system is provided. A link scheduling method of a transmission node in a wireless communication system supporting direct communication between the transmission and recipient nodes includes receiving interference information of at least one recipient node from at least one recipient node, the interference occurring from at least one transmission node to at least one reception node, scheduling links based on the interference information; and transmitting data according to the scheduled links.