Abstract:
The present disclosure relates to a 5G or pre-5G communication system for supporting a higher data transmission rate beyond a 4G communication system such as LTE. The present disclosure provides a method for supporting a device performing narrow band Internet of things (IoT) communication by a base station in a cellular system, the method comprising the operations of: transmitting a synchronization sequence for synchronization between the base station and the device performing the narrow IoT communication; transmitting system information including a two-bit mode indication field which indicates an operation mode for performing the narrow IoT communication, the operation corresponding to one of a plurality of operation modes; and transmitting a control channel and a data channel on the basis of parameters for the narrow band IoT communication, the parameter being included in the system information, wherein the operation modes include at least one of a standalone mode, a guard-band mode, an in-band mode in which the cellular system and the narrow band IoT communication use a common cell ID, or an in-band mode in which the cellular system and the narrow band IoT communication use different cell IDs.
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 5G or pre-5G communication system for supporting a higher data transmission rate than a 4G communication system such as LTE. The method for device to device communication according to the present disclosure comprises: a step of receiving, by a terminal, search data from search resources for relay search within a specified search-receiving resource pool, and decoding the same; a step of measuring, by the terminal, link qualities of the search resources which deliver demodulation reference signals, from the search resources corresponding to successfully decoded search data; and a step of filtering a link quality corresponding to an identifier of a specific relay among the measured link qualities.
Abstract:
The present disclosure relates to a 5G or pre-5G communication system for supporting a higher data transmission rate beyond a 4G communication system such as LTE. The present disclosure provides a method for supporting a device performing narrow band Internet of things (IoT) communication by a base station in a cellular system, the method comprising the operations of: transmitting a synchronization sequence for synchronization between the base station and the device performing the narrow IoT communication; transmitting system information including a two-bit mode indication field which indicates an operation mode for performing the narrow IoT communication, the operation corresponding to one of a plurality of operation modes; and transmitting a control channel and a data channel on the basis of parameters for the narrow band IoT communication, the parameter being included in the system information, wherein the operation modes include at least one of a standalone mode, a guard-band mode, an in-band mode in which the cellular system and the narrow band IoT communication use a common cell ID, or an in-band mode in which the cellular system and the narrow band IoT communication use different cell IDs.
Abstract:
The present disclosure relates to a communication scheme and system which fuse a 5G communication system for supporting a higher data transfer rate than a 4G system with IoT technology, and a system thereof. The present disclosure may be applied to smart services such as smart homes, smart buildings, smart cities, smart cars or connected cars, healthcare, digital education, retail businesses, security and safety services, etc., based on 5G communication technologies and IoT related technologies. The communication method with a device according to the present invention comprises the steps of: transmitting information on frequency hopping settings to the device; and receiving, from the device, an uplink signal which hops frequencies according to the frequency hopping settings, wherein the frequency hopping settings are configured in a way that the uplink signal hops frequencies according to hopping patterns which hop according to frequency hopping steps, and to additional mirroring hopping patterns which are respectively inserted between the hopping patterns.
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 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 method for allocating resources for Device-to-Device (D2D) communication in a transmitting terminal is provided. The method includes receiving broadcast resource allocation information for the D2D communication from a Base Station (BS), and measuring a channel quality of a downlink signal received from the BS and, if the measured channel quality is smaller than a predetermined threshold, conducting the D2D communication using the resource allocation information.
Abstract:
The present disclosure provides a method for performing a cellular communication in a device-to-device communication system, the method comprising the operations of: receiving scheduling to transmit an uplink signal through a specific resource of a discovery channel from a base station; generating uplink scheduling information notifying scheduling of the uplink signal; and transmitting the uplink scheduling information through at least one discovery resource of the discovery channel.
Abstract:
A method and an apparatus for synchronization for Device-to-Device (D2D) communication in unlicensed frequency bands are provided. The method includes determining whether a signal is detected during a preset time period within a synchronization period, after transmitting a synchronization signal during the synchronization period for the D2D communication, when it is determined that the D2D communication is to be performed, and starting the time period for the D2D communication and performing the D2D communication during the time period for the D2D communication, when it is determined that the signal is not detected.