Abstract:
A control channel transmission/reception method and an apparatus for transmitting/receiving control channels using a resource allocation scheme applicable regardless of reference signal transmission or whether the reference signal is transmitted in distributed transmission mode or localized transmission mode are provided. The control channel transmission method includes mapping a Demodulation Reference Signal (DMRS) to Resource Elements (REs) of a Resource Block (RB) for transmitting a control channel, mapping the control channel to the REs numbered with numbers of predetermined number of Resource Element Groups (REGs) in a frequency-first ascending order cyclically, with the exception of the REs to which the DMRS is mapped, and transmitting the DMRS and the control channel.
Abstract:
A method for allowing terminals to exchange discovery or synchronization signals to determine their presences among each other within a service area of a base station is provided. The method includes collecting multicast identifiers of another terminal for use in multicast communication, receiving a multicast control channel for Device-to-Device (D2D) multicast communication, performing Cyclic Redundancy Check (CRC) on the received multicast control channel using the collected multicast identifiers, and receiving, when the CRC is successful, the D2D multicast according to the multicast control channel. The D2D communication method and apparatus is advantageous in that the D2D terminal is capable of transmitting the discovery or synchronization signal to discover the neighbor terminals without disturbing downlink or uplink communication between the base station and the terminal, wherein the base station configures the resource for D2D communication so as to support D2D communication without an inter-device interference.
Abstract:
A method for transmitting control information by a base station in a wireless communication system is provided. The method includes determining a precoder to be applied to a resource and a Demodulation Reference Signal (DMRS) port, the resource being used to transmit the control information, and the DMRS port corresponding to the resource and being used to transmit a DMRS, precoding the resource and the DMRS port by using the determined precoder, and transmitting the control information and the DMRS to a user equipment.
Abstract:
A method and an apparatus for transmitting/receiving channel state information for use in multi-antenna system are provided. A signal communication method of a base station having a plurality of antennas in a wireless communication system includes determining antenna ports of first and second directions based on directions of the plurality of antennas, allocating channel measurement resources for the respective antenna ports to a terminal, transmitting a feedback configuration to the terminal according to the channel measurement resources, and receiving feedback information from the terminal based on the channel measurement resource and the feedback configuration. The signal transmission/reception method and apparatus are advantageous in transmitting/receiving channel state information efficiently in the system using a plurality of antennas.
Abstract:
A method for transmitting control information by a base station in a wireless communication system is provided. The method includes determining a precoder to be applied to a resource and a Demodulation Reference Signal (DMRS) port, the resource being used to transmit the control information, and the DMRS port corresponding to the resource and being used to transmit a DMRS, precoding the resource and the DMRS port by using the determined precoder, and transmitting the control information and the DMRS to a user equipment.
Abstract:
A control channel transmission/reception method and apparatus are provided. The control channel transmission method of a base station includes acquiring a criterion for sorting control channels, sorting the controls channels into at least two control channel sets based on the criterion, configuring the control channels by allocating at least one antenna port to each control channel set, and transmitting the control channels as configured.
Abstract:
A system access method of a narrowband terminal is provided for supporting both wideband and narrowband terminals in a cellular radio communication system. The method includes broadcasting a Shared CHannel (SCH) for a terminal to acquire system synchronization; transmitting a Low-end Master Information Block (L-MIB) including control information on an L-subframe configuration for supporting a second type terminal and a sub-band configuration of the L-subframe; transmitting a Low-end System Information Block (L-SIB) including information on downlink reception and uplink transmission of the second type terminal; and performing a random access procedure, when an attach request is received from one of the first type terminals and the second type terminals.
Abstract:
The present disclosure relates to a 5G or 6G communication system for supporting higher data transmission rates than 4G systems such as LTE. More specifically, disclosed are a method and device pertaining to generating and detecting a random access preamble signal for random access in ultra-high frequency band wireless communication. A terminal according to an embodiment disclosed herein comprises a transmission and reception unit and a control unit, wherein the control unit is configured to: generate a preamble signal; transmit the preamble signal to a base station; and receive a random access response including timing advance (TA) information from the base station in response to the transmission of the preamble signal, wherein the preamble signal may include a first signal portion related to a first sequence, and a second signal portion related to a guard time and a second sequence.
Abstract:
The present disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. An encoding method using a polar code in a wireless communication system, according to an embodiment of the present disclosure, may comprise: generating first cyclic redundancy check (CRC) bits for a plurality of information bits to be transmitted, by the number of second bits that is less than the number of first bits determined so as to add a CRC code with respect to the plurality of information bits; for vulnerable bits from among the plurality of information bits to be transmitted, generating second CRC bits as many as bits corresponding to a difference between the number of first bits and the number of second bits; generating first encoded bits in which the information bits, the first CRC bits, and the second CRC bits are concatenated; and polar-encoding the first encoded bits.
Abstract:
The disclosure relates to a 5G communication system or a 6G communication system for supporting higher data rates beyond a 4G communication system such as long term evolution (LTE). Disclosed is a method performed by a terminal, which includes generating application process state (APS) information indicating whether data generated by at least one application of the terminal is data generated in a background process or data generated in a foreground process; and transmitting a control signal including the APS information to a base station.