Abstract:
A method and an apparatus for performing synchronization by a first device in a Device-to-Device (D2D) network are provided. The method includes detecting a synchronization signal from at least one second device during one period, determining a phase adjustment value depending on a number of synchronization signals, which have been detected from the at least one second device during the one period, adjusting a phase value of a first device using the phase adjustment value, and transmitting a synchronization signal if the phase value of the first device reaches a predetermined specific value.
Abstract:
Different resources are selected based on QoS, emergency class, location, and SA count. A method for avoiding resource collision by a first User Equipment (UE) in a mobile communication system is provided. The method includes listening to Scheduling Assign (SA) information of a second UE; and selecting different resources between UEs based on the SA information.
Abstract:
The present invention provides a method for providing a service to a device having an interest in a specific service in a device-to-device (D2D) condition. The method includes: searching for a device which enters into an area managed by a device which provides the specific service; and identifying an interest of the searched device in the specific service and inviting the searched device to participate in the specific service. In the method, by selectively connecting a session based on a service interest, an efficient management in view of an entire network capacity is possible and an advantage of reducing a time for session connection is achieved.
Abstract:
A method for supporting an application by Device to Device (D2D) communication in a wireless network includes acquiring range control information from an application upon selection of the application installed in the source device, controlling transmission power of a discovery signal for discovering a target device to conduct D2D communication, based on range control information defined for the selected application, and transmitting the discovery signal with the controlled transmission power. An apparatus includes a controller configured to acquire range control information from an application upon selection of the application installed in the source device, and control transmission power of a discovery signal for discovering a target device to conduct D2D communication, for the selected application based on range control information defined for the selected application, and a transmitter configured to transmit the discovery signal with the controlled transmission power.
Abstract:
An apparatus and a method for providing a call taxi service based on D2D communication are provided. When a user terminal executes a call taxi service, a call taxi service request is transferred to a terminal from at least one taxi located in a neighboring area of the user terminal, and then the user terminal directly selects one taxi or one taxi is selected through a competition between taxis. As a result, a process of providing the call to the selected taxi. Accordingly, the user has an advantage of using a quick call taxi service without going through a separate call center.
Abstract:
A method and apparatus for performing initial entry for Device-to-Device (D2D) communication in a wireless communication system include transmitting an initial entry request including a service request for D2D communication to a Mobility Management Entity (MME) by a terminal, and if the service request for D2D communication is accepted, receiving information indicating that the initial entry request is accepted, including D2D communication information from the MME by the terminal.
Abstract:
A power supply apparatus for wirelessly supplying power to one or more terminals includes a signal transceiver configured to receive a charging state message indicating a charging state from the one or more terminals, a display unit configured to display the charging state of each of the one or more terminals based on the charging state message, an interface unit configured to receive a charging control signal for controlling a charging operation of each of the one or more terminals, a controller configured to control the signal transceiver to transmit a power reception control signal for controlling whether the one or more terminals receive power by analyzing the charging control signal for the one or more terminals and a power supplier configured to wirelessly supply power to the one or more terminals under a control of the controller.
Abstract:
A method performed by a device for performing synchronization between devices for a Device-to-Device (D2D) communication is provided. The method includes setting, according to a process of the device, the device to a group of devices for performing a dynamic switching; outputting a synchronization signal corresponding to the set group as a signal for setting synchronization in a physical layer; controlling, upon receiving another synchronization signal from another device, the outputting of the synchronization signal by applying a time offset according to a relation between the set group that includes the device and the group that includes the another device; and setting, if the synchronization signal and the another synchronization signal are converged, synchronization of the device based on a time point where the synchronization signal is output.
Abstract:
Disclosed is a 5th generation (5G) or pre-5G communication system for supporting a data transmission rate higher than that of a 4th generation (4G) communication system such as long-term evolution (LTE). According to various embodiments of the present disclosure, a terminal operation method in a wireless communication system comprises the steps of: identifying a primary anchor carrier among a plurality of anchor carriers used by a base station; and receiving an information signal (IS) from the base station through the identified primary anchor carrier, wherein the primary anchor carrier can be continuously maintained in order to receive the IS from the base station.
Abstract:
A power supply apparatus for wirelessly supplying power to one or more terminals includes a signal transceiver configured to receive a charging state message indicating a charging state from the one or more terminals, a display unit configured to display the charging state of each of the one or more terminals based on the charging state message, an interface unit configured to receive a charging control signal for controlling a charging operation of each of the one or more terminals, a controller configured to control the signal transceiver to transmit a power reception control signal for controlling whether the one or more terminals receive power by analyzing the charging control signal for the one or more terminals and a power supplier configured to wirelessly supply power to the one or more terminals under a control of the controller.