Abstract: A chemical vapor deposition apparatus can include a reaction chamber having a reaction space therein; a wafer boat disposed in the reaction space, the wafer boat arranged and structured to support a plurality of wafers; and a gas supplying part disposed in the reaction chamber to supply two or more reaction gases to the plurality of wafers. The gas supplying part can include a plurality of gas pipes disposed in the reaction chamber to supply the two or more reaction gases from outside to the reaction space; and a plurality of supplying pipes disposed around the wafer boat, wherein each of the supplying pipes is connected to two or more corresponding gas pipes, and wherein each supplying pipe is configured to supply the two or more reaction gases supplied by the two or more corresponding gas pipes to a corresponding one of the wafers.

Abstract: The present disclosure relates to a pre-5th-generation (5G) or 5G communication system to be provided for supporting higher data rates beyond 4th-generation (4G) communication system such as a long term evolution (LTE). A method for providing a device-to-device (D2D) communication-based service for an isolated user equipment (IUE) by a relay user equipment (RUE) in a mobile communication system is provided. The method includes establishing a D2D link with an IUE; and supporting establishment of a relay cellular link for the IUE based on the established D2D link, wherein the RUE is within a service coverage of an enhanced node B (eNB).

Abstract: The present disclosure relates to a pre-5th-generation (5G) or 5G communication system to be provided for supporting higher data rates beyond 4th-generation (4G) communication system such as a long term evolution (LTE). The present invention relates to a method for selecting, by a device, a peer discovery resource (PDR) in a device-to-device (D2D) communication system, the method comprising the steps of: determining a PDR selection range which can be selected by the device; and selecting a PDR in the determined PDR selection range.

Abstract: In order to generate multiple-access signals, each transmitter transmits information by using all or a part of channel resources. The signal of each transmitter is mapped to an OFDM time-frequency resource space as a trellis modulation path. A mobile communication system maps trellis modulation paths of a plurality of transmitters to the same resource space. In order to effectively detect and distinguish signals of a plurality of transmitters transmitted through the same channel resource space, a receiver uses a message passing method between symbols and a path connection method. The receiver uses a state space expansion method, a backward pre-decoding method, and a successive interference cancellation method to more efficiently reconstruct a discovery signal.

Abstract: An apparatus is configured to perform a method for performing distributed scheduling by a reception device configuring a target link corresponding to one of a plurality of links in a network in which the plurality of links for device to device communication exist. The method includes adding up resource allocation demand amounts included in resource information broadcasted by a counterpart device configuring the target link and one or more adjacent transmission devices by a preset Resource Unit (RU), and adjusting self resource information in consideration of resource position information included in the broadcasted resource information and the added resource allocation demand amount and transmitting the adjusted self resource information to the counterpart transmission device.

Abstract: A device and a method for performing Device to Device (D2D) communication in a wireless communication system are provided. The method includes transmitting information on a self-frequency band selected from all frequency bands for the D2D communication, to the second mobile station, receiving information on a counterpart-frequency band selected for the D2D communication, from the second mobile station, determining transmission and reception frequency bands to be used for the D2D communication, based on the information on the self-frequency band and the information on the counterpart-frequency band, transmitting data to the second mobile station in the determined transmission frequency band, and receiving data from the second mobile station in the determined reception frequency band.

Abstract: The present disclosure relates to a pre-5G or 5G communication system to be provided for supporting higher data rates beyond a 4G communication system, such as Long Term Evolution (LTE). Disclosed are a method and an apparatus for performing interleaving by using an identical interleaving bit generation method in multiple interleavers included in a communication system. The present disclosure provides a method for interleaving an input bit sequence by an interleaver of a multiple access communication system. The method includes setting a common parameter used by multiple interleavers; setting a unique parameter for the interleaver in view of a correlation between bit sequences which are input to the multiple interleavers; and interleaving the input bit sequence by using prime-power depending on the common parameter and the unique parameter.

Abstract: A communication method of a user equipment (UE) in a wireless communication system is provided. The method includes determining overlap in a time domain between data reception by the UE in a subframe and data transmission by the UE in an immediate subsequent subframe, and dropping, when the overlap is determined, one of the data reception in the subframe and the data transmission in the immediate subsequent subframe.

Abstract: The present invention is to provide a method and device for controlling transmission power by taking comprehensive consideration not only of the effect received onto itself in each device-to-device (D2D) link of a D2D communication network but also of the effect exerted onto the neighboring links.

Abstract: The present disclosure relates to a device-to-device (D2D) communication for direct communication between nodes in a wireless communication system, wherein an operation method of a terminal includes the steps of: generating sequences, which belong to an orthogonal sequence set, according to a sequence pattern corresponding to a priority of a link; and transmitting the sequences, as signals for measurement of a reception electric power of a counterpart terminal, through sub-blocks within a channel, wherein one sequence is transmitted through each of the sub-blocks.

Abstract: The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). A base station and method thereof are provided for hybrid automatic retransmit request (HARQ) feedback in a wireless communication system. A method includes generating transmission beam information for transmitting hybrid automatic retransmit request (HARQ) feedback information for an uplink data packet received from a terminal; scheduling a HARQ feedback channel in a downlink subframe, based on the transmission beam information; and transmitting the HARQ feedback information, based on the HARQ feedback channel.

Abstract: A synchronization method and an apparatus for Device-to-Device (D2D) communication in a User Equipment (UE) are provided. The method includes comparing a reception power of a signal received from an evolved Node B (eNB) with a first reference power, if the reception power is less than the first reference power, generating and transmitting a synchronization signal for D2D communication by operating as a synchronization reference UE, comparing the reception power of a signal received from the eNB with a second reference power, and if the reception power is greater than or equal to the first reference power and less than the second reference power, relaying a synchronization signal received from the eNB by operating as a synchronization relaying UE.

Abstract: The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). A method for performing device-to-device (D2D) communication by an in-coverage user equipment (UE) in a cellular communication system is provided. The method includes receiving a scheduling grant through a downlink control channel from a base station (evolved Node B (eNB)) and transmitting a scheduling assignment (SA) message in an SA region of a D2D communication frame and data in a data region of the D2D communication frame, based on the scheduling grant, wherein the scheduling grant indicates a resource pattern for transmission (RPT) corresponding to a set of resource units or a subset of a resource unit in a time domain and a frequency domain that is used for transmission of the data.

Abstract: A method for performing synchronization by a device in a device to device (D2D) communication system is provided. The method includes transmitting a first synchronization signal, and transmitting offset information indicating a time difference between a synchronization reference time of the first synchronization signal and a transmission time of the first synchronization signal.

Abstract: The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system rt to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). An apparatus and method for acquiring synchronization information through the transmission and reception of signals between devices for device to device (D2D) communication is provided. A method for a user equipment (UE) in a wireless communication system includes detecting a synchronization signal of another UE in a predetermined measurement gap. The method also includes transmitting a detected result of the synchronization signal to an evolved Node B (eNB). A start time point of the measurement gap in a first measurement gap period and a star(time point of the measurement gap in a second measurement gap period are different from each other.

Abstract: Provided is a distributed scheduling method and apparatus for resource allocation for Device-to-Device (D2D) communication. The method includes sending, by a Mobile Station (MS) including data to transmit, a first resource reservation message through at least one first slot among a plurality of slots constituting a resource reservation unit in a resource reservation channel; and when a second resource reservation message sent by another MS is not sensed in a slot with a higher priority than the first slot in the resource reservation unit, transmitting the data through a transmission resource unit corresponding to the resource reservation unit in a data transmission channel. The resource reservation channel corresponds to the transmission resource unit, and the plurality of slots has mutually cyclic priorities.

Abstract: A method for aligning discovery channel intervals of a serving cell and a neighbor cell in a cellular communication system is provided.

Abstract: Disclosed is a method for supporting synchronization of a user equipment (UE) for D2D communication. The method includes: first scanning for checking a synchronization signal transmitted from a nearby UE; establishing the UE as a synchronization-transmitting UE, based on a result of the first scanning; transmitting a synchronization channel including timer value information indicating scanning time at which a scanning starts; and second scanning based on the timer value information.

Abstract: Disclosed is a method for controlling interference for D2D communication. The method includes: identifying whether a position of a first user device belongs to a first area that satisfies a predetermined criterion; and if the position of the first user device is identified to belong to the first area, determining some resources constituting dedicated resources of the first area, among available resources of a signal for discovering a counterpart user device of D2D communication by the first user device, as resources of the signal.

Abstract: The present invention relates to a transmitting method for minimizing the delay time for data transmission via a wired backbone network using a shared relay station (SRS), wherein the steps of transmitting data and control information using the shared relay station comprises: a) sharing a relay station between at least two base stations (BS) and b) transmitting data via at least two base stations, terminals connected to the respective base stations, and a relay station. According to the present invention, the delay time for data transmission is minimized in comparison with conventional cellular networks, as data which was transmitted to a controller of a core network via a wired backbone network in the conventional cellular networks is transmitted to base stations or terminals via a wireless link by means of a shared relay station.