Abstract: Certain aspects are directed to a configuration sub-system for telecommunication systems. The configuration sub-system can include a test signal generator, a power measurement device, at least one additional power measurement device, and a controller. The test signal generator can be integrated into components of a telecommunication system. The test signal generator can provide a test signal to a signal path of the telecommunication system. The power measurement device and the additional power measurement device can respectively be integrated into different components of the telecommunication system. The power measurement device and the additional power measurement device can respectively measure the power of the test signal at different measurement points in the signal path. The controller can normalize signals transmitted via the telecommunication system by adjusting a path gain for the signal path based on measurements from the power measurement device and the additional power measurement device.

Abstract: An array of antenna elements are located in relation with a plurality of pre-characterized reference detectors. At baseband frequencies, a transmit radiation pattern of the array of antenna elements is sensed with the plurality of pre-characterized reference detectors, at a plurality of phase and gain settings, to detect mismatch among two or more elements of the array of antenna elements. Phase and gain settings for the array of antenna elements are updated to correct the mismatch.

Abstract: Methods and systems for facilitating placement of a small cell in a network are provided. A small cell may be positioned such that it is communicatively coupled to a macro cell to provide a relay backhaul to a wireless network. The small cell may be configured to provide feedback of some form when the small cell is moved from a suitable location, to facilitate desired placement and use of the small cell. The feedback may be in the form of a change in functionality of the one or more feedback components.

Abstract: A system that incorporates aspects of the subject disclosure may perform operations including, for example, receiving, via an antenna, a signal generated by a communication device, detecting passive intermodulation interference in the signal, the interference generated by one or more transmitters unassociated with the communication device, and the interference determined from signal characteristics associated with a signaling protocol used by the one or more transmitters. Other embodiments are disclosed.

Abstract: A user apparatus communicating with a first base station and a second base station in a communication system which supports carrier aggregation is provided. The user apparatus includes a measurement unit configured to measure a timing gap between a reception timing of a first radio signal received from the first base station and a reception timing of a second radio signal received from the second base station; and a transmission unit configured to transmit the information indicating the timing gap measured by the measurement unit to the first base station or the second base station.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer-storage media, for processing communications signals using a machine-learning network are disclosed. In some implementations, pilot and data information are generated for a data signal. The data signal is generated using a modulator for orthogonal frequency-division multiplexing (OFDM) systems. The data signal is transmitted through a communications channel to obtain modified pilot and data information. The modified pilot and data information are processed using a machine-learning network. A prediction corresponding to the data signal transmitted through the communications channel is obtained from the machine-learning network. The prediction is compared to a set of ground truths and updates, based on a corresponding error term, are applied to the machine-learning network.

Abstract: An information system generates data, generates an audio token, associates the audio token with the data, and transmits the audio token along with the data to the account management system. The information system configures a broadcasting computing device to broadcast the audio token at a location. User computing devices at the location via an audio communication channel receive the broadcast token and retransmit the audio token to the account management system via a network. The account management system receives the audio token from a particular user computing device along with a request for data associated with the audio token, extracts the data associated with the audio token data, and transmits the data associated with the audio token to the particular user computing device.

Abstract: A communication device in a communication network includes at least one processor. The at least one processor is configured to at least one processor configured to search a spectrum of the communication network using a Long Term Evolution Primary Synchronization/Secondary Synchronization Signals (LTE PSS/SSS), estimate the LTE interference using cell specific reference signals for Down Link (DL) when the LTE PSS/SSS signal is detected, and utilize LTE cell specific reference signals (CRS) and feed the equalized signal to a Data Over Cable Service Interface Specification (DOCSIS) Physical Layer (PHY) engine.

Abstract: Methods are disclosed which can be performed by a network node for sending to a wireless device a first synchronization signal and an associated information message, for synchronization of the wireless device with the network node. The network node and the wireless device operate in a wireless communications network. The network node sends the first synchronization signal in N OFDM symbols within a subframe, at least once in a time and frequency position in every one of the N OFDM symbols. N is equal or larger than 2. For each sending of the first synchronization signal, the network node sends an associated information message at a pre-defined time and frequency position in an OFDM symbol. The pre-defined time and frequency position is relative to the time and frequency position of the first synchronization signal. The associated information message is associated with the first synchronization signal.

Abstract: A method for operating a transmitting device to communicate with a receiving device is described herein. The method includes the step of the transmitting device selecting a root index value from a set of root index values. The method further includes the step of the transmitting device generating a frequency domain Constant Amplitude Zero Auto-Correlation sequence based on the selected root index value. The method further includes the step of the transmitting device modulating the Constant Amplitude Zero Auto-Correlation sequence by a pseudo-noise sequence. The method further includes the step of the transmitting device generating an Orthogonal Frequency Division Multiplexing symbol, wherein the frequency domain Constant Amplitude Zero Auto-Correlation sequence modulated by the pseudo-noise sequence defines subcarrier values for the Orthogonal Frequency Division Multiplexing symbol.

Abstract: Aspects of the subject disclosure may include, for example, a process that encodes a number of digital signals representing image data captured by a video camera, the image data being provided by the video camera in accordance with a 4K ultra-high definition (4K-UHD) standard. The number of digital signals are provided to a multiplexing unit that outputs a multiplexed signal including a number of optical wavelengths, the multiplexed signal being transmitted on a single fiber-optic cable unidirectionally from the multiplexing unit to a presentation device. The multiplexed signal is transmitted on the single cable unidirectionally from the proximal end to the distal end. Other embodiments are disclosed.

Abstract: Systems and methods are provided for reducing interference when optical signals are added. One embodiment includes a method for adding an optical channel for communicating data and having a bandwidth within an optical spectrum for transmission along an optical link of an optical network. The method includes creating a lower frequency holding zone having a lower frequency bandwidth adjacent to the bandwidth of the added optical channel and including at least one lower frequency sub-slice having a power spectral density that varies throughout the lower frequency sub-slice. Also, the method includes creating a higher frequency holding zone having a higher frequency bandwidth adjacent to the bandwidth of the added optical channel and including at least one higher frequency sub-slice having a power spectral density that varies throughout the higher frequency sub-slice. The lower frequency holding zone and the higher frequency holding zone are dynamically configured with respect to fiber and channel requirements.

Abstract: An overlapped multiplexing-based modulation and demodulation method and device are disclosed. In the modulation method, a precoding structure is used, and a transmit end first performs parity check product code-based coding on an input information sequence, generates a factor graph for a coding result and according to a coding rule, then performs overlapped multiplexing-based modulation and coding, and transmits a coded signal by using an antenna. In the demodulation method, a signal is transmitted by using a channel, and after receiving the signal by using an antenna, a receive end first performs digital signal processing, including processes such as synchronization and equalization, then performs overlapped multiplexing-based demodulation and decoding, and finally performs factor graph-based belief propagation decoding on a decoding result, to finally obtain a decoded sequence.

Abstract: The disclosure includes an apparatus comprising a diagnostic unit configured to communicate with a rules engine to determine whether a transmission detected in a vehicle is classified as driver wireless device usage based on passenger data indicating whether a passenger is present in the vehicle. The disclosure also includes a system comprising a shielding unit configured to transmit a noise signal to interrupt a transmission detected in a vehicle, and a diagnostic unit configured to communicate with a rules engine to determine whether the detected transmission is classified as driver wireless device usage based on the passenger data indicating whether a passenger is present in the vehicle, and activate a recording if the transmission is classified as driver wireless device usage.

Abstract: A data transmission boosting system includes a boosting server and a client boosting device, wherein the boosting server and the client boosting device are connected to the internet respectively. The client boosting device further includes a data receiving module, a classifying module, and a transmitting module. The data receiving module receives data packets from at least one terminal device. The classify module classifies the data packets as data packets to be boosted, non-boosting data packets, or unknown data packets. The transmitting module transmits the data packets classified as the data packets to be boosted to the boosting server through the internet, and transmits the data packets classified as the non-boosting data packets to the internet.

Abstract: In an embodiment, an apparatus includes: a modulator to modulate a first packet according to rate control information; a physical circuit to transmit the modulated first packet according to power control information; and a dynamic adaptation circuit, for the first packet, to provide the rate control information and the power control information of a first modulation and power pair stored in a first energy map.

Abstract: Provided are a method and an apparatus for competition-based transmitting of uplink data in a wireless communication system to which a non-orthogonal multiple access scheme is applied. Particularly, a terminal receives, from a base station, information relating to a predefined modulation pattern for non-orthogonal multiple access. The information relating to the predefined modulation pattern includes a modulation pattern index. The modulation pattern index indicates designation of a terminal-specific modulation order for each resource element in a resource used overlappingly by multiple terminals. The terminal transmits data to the base station using the modulation order designated to each of the resource elements on the basis of the information relating to the predetermined modulation pattern.

Abstract: The present disclosure provides a method and a User Equipment (UE) supporting transmission power adjustment. The UE first receives a first signaling, and then transmits a first wireless signal. A first modulation symbol sequence is used to generate the first wireless signal; the first modulation symbol sequence employs a target waveform; a first bit block is used to generate the first modulation symbol sequence; the first signaling is used to determine the target waveform out of X waveforms; a transmitting power of the first wireless signal is a first power; at least one of an upper bound of the first power and the first power is related to the target waveform. The method can adjust the UE transmitting power according to the waveform of the uplink transmission, thus reducing the power loss of the UE or improving the coverage performance of the uplink transmission.

Abstract: A wireless device receives an uplink grant indicating radio resources in consecutive time intervals. A respective packet is stored for each time interval of the consecutive time intervals. in response to determining that the wireless device cannot access a channel for a transmission in a first time interval of the consecutive time intervals: the respective packet stored for the first time interval is not transmitted; and a listen-before-talk procedure indicating that the channel is clear in a second time interval subsequent to the first time interval is performed. The respective packet stored for each time interval of the time intervals is transmitted via time intervals starting from the second time interval to a last time interval of the consecutive time intervals.

Abstract: A device and method for receiving communications with dynamic data correction, the method including receiving at a receiving device a data packet from a sending device, the data packet including a header, and a data payload including one or more message blocks and corresponding redundancy blocks; recognizing, via pre-configuration of the receiving device, that there are redundancy blocks to receive along with the one or more message blocks and reading in the message blocks and corresponding redundancy blocks; determining that at least one of the message blocks is defective (e.g., corrupt, missing, etc.); processing one or more of the redundancy blocks to correct the defective message blocks; and optionally sending a response message to the sending device. The method may further include identifying which message blocks are defective and sending a request for, and receiving, redundancy blocks corresponding to the identified defective message blocks.

Abstract: A method and a system are provided for channel detection like radio frequency channel detection in modern telecommunication standards like 5G-NR (new radio). The method and the system provide a fast and sensitive channel detection by evaluating a radio frequency signal received. The respective method and system may be applied to different telecommunication standards, for example new telecommunication standards like 5G-NR (new radio) and LTE.

Abstract: There is provided a method of generating a space-time block code (STBC) for encoding a digital data sequence comprising a set of independent symbols to be transmitted through a transmission channel in a communication system, the space-time block code being represented by a set of linear dispersion matrices in a linear dispersion representation, each linear dispersion matrix comprising components having complex values, the method comprising, generating at least some of the linear dispersion matrices depending on component-wise conditions related to a set of selected pairs of the linear dispersion matrices, each pair comprising a first linear dispersion matrix and a second linear dispersion matrix, said component-wise conditions comprising a component-wise condition between the components of the first linear dispersion matrix and the components of the second linear dispersion matrix.

Abstract: An optical line terminal or an optical network unit first obtains link communication quality of both a first physical link and a second physical link between the optical line terminal and the optical network unit, performs FEC encoding on the first physical link by using a first FEC code, and performs FEC encoding on the second physical link by using a second FEC code. The link communication quality of the first physical link is higher than that of the second physical link, and encoding performance of the second FEC code is higher than that of the first FEC code. Based on the foregoing technical solutions, a FEC encoding type may be selected flexibly based on communication quality of different physical links. FEC encoding having relatively low FEC encoding performance is used for a link in a good state, to reduce overheads, bandwidth, and energy consumption.

Abstract: A low density parity check code transmission method and device, for use in improving the anti-burst-error capability of a low density parity check code. The method provided by the present application comprises: an interleaver changes the sequence of bit streams of a low density parity check code according to a preset rule, and outputs to a modulator the low density parity check code the sequence of bit streams of which is changed; the modulator modulates the low density parity check code the sequence of bit streams of which is changed and then sends the modulated low density parity check code to a receive end by using a channel.

Abstract: A receiver is provided. The receiver includes: a first decoder configured to decode a superposition-coded signal by using a parity check matrix to generate Low Density Parity Check (LDPC) information word bits and first parity bits corresponding to a first layer signal; an encoder configured to encode the LDPC information word bits and the first parity bits to generate second parity bits, or encode the LDPC information word bits to generate the first parity bits and the second parity bits, by using the parity check matrix; and a second decoder configured to decode a signal which is generated by removing the first layer signal, corresponding to the LDPC information word bits, the first parity bits, and the second parity bits, from the superposition-coded signal, to reconstruct bits transmitted through the second layer signal.

Abstract: There are provided a method and an interface system for Bidirectional Synchronous Serial (BISS) protocol data decoding. The method includes: an MA drive module receiving an enable signal en and transmitting an MA clock signal to an SL receiving module, and then the SL receiving module detecting a trigger signal of SL; when a start bit of the SL is detected by the SL receiving module, the SL receiving module reading SL data; after the SL data is read, the SL receiving module transmitting a done signal to the MA drive module to stop operation of the MA drive module and transmitting a did signal to a CRC check module; and after the did signal is received by the CRC check module, the CRC check module performing CRC check on the SL data and outputting a correct position value after the check is completed.

Abstract: When receiving a first data frame sent by a transmitting apparatus, a receiving apparatus may return error indication information including an identifier of at least one erroneous codeword group to the transmitting apparatus if it is found that an error occurs in an initial codeword of the first data frame. The transmitting apparatus may obtain the erroneous codeword group and encode the erroneous codeword group, and retransmit a part of a sub check codeword obtained through encoding to the receiving apparatus. The receiving apparatus may obtain a third check matrix based on a first check matrix, a second check matrix, and a location of the at least one erroneous codeword group in the initial codeword, and re-decode the retransmitted partial sub check codeword and content of the first data frame together based on the third check matrix, so as to obtain a correct initial codeword.

Abstract: A processing method under data duplication and related devices are provided, which are applied to a communication system. The communication system comprises a first communication device, and the first communication device comprises a PDCP entity. The method comprises: when data duplication is enabled, the PDCP entity of the first communication device duplicates target data, and the target data do not comprise data of which transmission have been completed and/or data that are being transmitted; and the PDCP entity of the first communication device delivers the duplicated target data to the RLC entity.

Abstract: Multicast error detection and recovery may be provided. A join request for a multicast stream may be sent from a first network node to a second network node. The join request may be sent over a first link of a plurality of links between the first network node and the second network node. A redirect message indicating that the second network node cannot accommodate the join request may be received by the first network node from the second network node. In response to receiving the redirect message, the join request for the multicast stream may not be sent on a second link of the plurality of links by the first network node to the second network node. And in response to receiving the redirect message, an alternate upstream network node may be determined by the first network node to send the join request for the multicast stream to.

Abstract: Through the identification of different packet-types, packets can be handled based on an assigned packet handling identifier. This identifier can, for example, enable forwarding of latency-sensitive packets without delay and allow error-sensitive packets to be stored for possible retransmission. In another embodiment, and optionally in conjunction with retransmission protocols including a packet handling identifier, a memory used for retransmission of packets can be shared with other transceiver functionality such as, coding, decoding, interleaving, deinterleaving, error correction, and the like.

Abstract: The present specification discloses a method for executing a hybrid automatic request (HARQ) in a wireless communication system, the method, which is executed by a terminal, comprising the steps of: receiving an initial HARQ packet corresponding to a specific HARQ process ID (PID) from a first base station via a first wireless link; receiving a retransmission HARQ packet corresponding to the HARQ PID from a second base station via a second wireless link; combining the initial HARQ packet and the retransmission HARQ packet; decoding the combined HARQ packet; and, on the basis of the result of the decoding, determining whether to transmit HARQ feedback via the first wireless link.

Abstract: Methods and devices utilizing sidelink transmission between user equipment (UEs) for HARQ retransmission are provided. The sidelink HARQ retransmissions include data from the initial transmission or an outer coded version thereof. HARQ feedback from the targeted receiver of the initial transmission may identify code block groups and/or individual code blocks the target receiver did not successfully decode. A UE that has not successfully decoded an entire transport block, may still cooperate in HARQ retransmission for the targeted receiver of the transport block by retransmitting at least a subset of the code block groups that it was able to successfully decode for the transport block.

Abstract: Facilitating configurable hybrid automatic repeat request (HARQ) feedback types for new radio sidelink communication can be performed for a 5G wireless network. Based on whether reception of data was successful or not, a reception node can send acknowledgement (ACK) data or negative acknowledgement (NACK) data to a base station using an uplink control signal. Therefore, the feedback data can be used to manage subsequent resource allocation decisions within the 5G wireless network.

Abstract: Apparatuses, methods, and systems are disclosed for retransmission indication. One apparatus includes a receiver that receives a first reference signal transmitted on a first set of resource elements from a device. The first reference signal is associated with a first data. The apparatus also includes the receiver receiving a second reference signal transmitted on a second set of resource elements from the device. The second reference signal is associated with a second data, and the first data and the second data may be different redundant versions of data.

Abstract: A method of performing an operation for a first user equipment (UE) in a wireless communication system includes determining a slot for transmitting a physical uplink control channel (PUCCH) based on a value related to the number of slots from a physical sidelink feedback channel (PSFCH) to the PUCCH by the first UE, and transmitting, to a base station (BS), feedback information based on the PSFCH through the PUCCH in the slot by the first UE. The value related to the number of slots is applied based on a last of slots for the PUCCH, overlapped with a slot for the PSFCH on a time axis.

Abstract: Provided herein are a method for performing wireless communication by a first apparatus and an apparatus for supporting the same. The method may include the steps of receiving a service from a second apparatus, through a data link including multiple data paths, and determining whether or not to transmit a sidelink hybrid automatic repeat request (SL HARQ) feedback being related to the service to the second apparatus. Herein, based on Quality of Service (QoS) requirements of a service being transmitted through the multiple data paths, the data link may include the multiple data paths.

Abstract: The present invention discloses a transmission method and apparatus for feedback information of uplink transmission. The method comprises: a terminal transmitting a physical uplink shared channel (PUSCH) in a special sub-frame m, where m is an integer; the terminal detecting, subsequent to the special frame m, in a sub-frame comprising downlink transmission resources or in a sub-frame m+k, a downlink control channel using an uplink/downlink control information (DCI) format, where k is a positive integer; and the terminal determining, according to the downlink control channel, whether to again transmit the PUSCH transmitted in the special sub-frame m. accordingly, the present invention provides a transmission solution that transmits PUSCH feedback information in a special sub frame, ensuring that the PUSCH transmitted in the special sub frame can normally obtain ACK/NACK feedback information.

Abstract: A vehicle includes a plurality of controllers configured to control operation of at least one load and share information with each other; a communication module configured to perform communication between the at least one load and the plurality of controllers; and a plurality of connectors provided between the plurality of controllers, the at least one load, and the communication module, configured to connect the plurality of controllers, the at least one load, and the communication module. One of the plurality of controllers may transmit a preset number of times of communication signals to the other controller and the communication module when the information is not received for a predetermined time, store the number of times of reception of response signals as error information, and transmit the stored error information to the outside when receiving an error information transmission command from the outside.

Abstract: Methods, apparatuses, and computer-readable mediums for wireless communication by a user equipment (UE) includes transmitting a packet on a first resource, determining one or more repetition resources on which to send one or more redundancy versions of the packet, wherein the one or more repetition resources are at a time subsequent to the first resource, transmitting repetition resource information identifying the one or more repetition resources to one or more neighboring UEs, and transmitting the one or more redundancy versions of the packet on respective ones of the one or more repetition resources.

Abstract: Method and device for indicating sub-band configuration, and method and device for accessing sub-band are provided. The method for indicating sub-band configuration includes: configuring a broadcast channel in a basic sub-band which is configured with a synchronization signal; and indicating sub-band configuration of at least one non-basic sub-band directly or indirectly through a master information block carried by the broadcast channel, wherein the sub-band configuration of the non-basic sub-band is used for user equipment accessing the non-basic sub-band. UE may access different sub-bands efficiently with relatively high flexibility and relatively few signaling overhead.

Abstract: The present invention is designed so that communication can be carries out adequately even when the number of component carriers that can be configured in a user terminal is expanded from that in existing systems. According to one aspect of the present invention, a user terminal communicates by using a plurality of component carriers (CCs), and has a data buffering section that stores uplink data, a generating section that generates a BSR MAC CE (Medium Access Control Control Element), in which a given index corresponding to a buffer size is included, based on BSR (Buffer Status Report) tables, in which amounts of uplink data that is stored (buffer sizes) and indices are associated, and a transmission section that transmits the BSR MAC CE, and one of the BSR tables is a first BSR table for use when more than five CCs are configured in the user terminal.

Abstract: The present invention relates to a pilot tone generating method and apparatus of an orthogonal frequency division multiple access system and method, and a channel estimation method and apparatus using the same. The channel estimation apparatus includes a pilot tone extracting unit for extracting a pilot tone, which is inserted within a frame with data tone, masked with an orthogonal code; a pilot tone unmasking unit for unmasking of the pilot tone extracted from the pilot tone extracting unit by using an orthogonal code information; and a channel estimation operating unit for estimating a channel by calculating an average of the pilot tones which is unmasked in the unmasking unit.

Abstract: In a wireless communication system, user equipments (UEs) may be partitioned into different groups, e.g. based on spatial separation. UEs may use multiple access (MA) signatures that have low or no correlation to each other if the UEs are in the same group. The MA signatures used by one group of UEs may be more correlated with the MA signatures used by another group of UEs. If the UEs are partitioned into the different groups based on spatial separation, then the spatial separation between the different groups may assist in increasing the reliability of detection if two UEs in different groups use correlated MA signatures.

Abstract: The described technology is generally directed towards adapting the demodulation reference signal sent in a wireless resource data block based on channel estimation performance. In general, if the demodulation reference signal received was not successfully able to be used to demodulate the resource data block, the demodulation reference signal density can be increased up to a maximum density, which costs resource elements but improves the channel estimation accuracy. If the demodulation reference signal received was able to be used to demodulate the resource data block, the demodulation reference signal density can be decreased down to minimum density, which saves resource elements for data. The network device can use HARQ ACK/NACK data (e.g., a current count or counted over a time period) to determine channel estimation performance, and/or the user equipment can recommend a demodulation reference signal density change.

Abstract: Systems and methods are described for a mesh network of Access Points (APs) and Customer Premises Equipment (CPE) to provide broadband access to premises such as houses or enterprises. Systems and method are described to enable self-configurable CPEs in the sense that the CPEs autonomously find and establish communications with the AP/CPEs from which they receive the strongest signal. Systems and methods are described to enable a self-healing network in the sense that the CPEs autonomously detect low received signal strength or lost connection, and find and establish communications with the AP/CPE from which they receive the strongest signal.

Abstract: Disclosed are a method, a network device, and a terminal device for transmitting a reference signal. The method includes: determining, by the network device of the first cell, a first resource element corresponding to the first cell, and at least one second resource element corresponding to at least one second cell; determining, by the network device, a resource element with the largest time domain resource and a resource element with the largest frequency domain resource among the first resource element and the at least one second resource element; determining, by the network device, a reference signal resource according to the resource element with the largest time domain resource and the resource element with the largest frequency domain resource; and transmitting, by the network device, a reference signal to a terminal device on the reference signal resource.

Abstract: Aspects of the present disclosure provide techniques for design of synchronization signals for narrowband operation, which can be used for stand-alone/in-band/guard-band deployment. An example method is provided for operations which may be performed by a base station (BS). The example method generally includes generating a primary synchronization signal (PSS) utilizing a first code sequence and a cover code applied to the first code sequence over a first number of symbols within one or more subframes, generating a secondary synchronization signal (SSS) based on a second code sequence over a second number of symbols within one or more subframes, and transmitting the PSS and the SSS in the first and second subframes to a first type of a user equipment (UE) that communicates on one or more narrowband regions of wider system bandwidth.

Abstract: Aspects of the disclosure relate to mechanisms for encoding and transmitting an encoded channel indication that indicates a starting sub-channel and a number of sub-channels for a transmission over a vehicle-to-everything (V2X) carrier. The encoded channel indicator may be transmitted within at least one symbol of a listen-before-talk (LBT) section of a slot.

Abstract: A data communication method and a related apparatus are provided, and the data communication method includes: constructing, by an access device, a beacon frame, where the beacon frame includes a newly added field, and the newly added field represents multiple data guard interval lengths supported by the access device; and broadcasting, by the access device, the beacon frame, so that a terminal selects an available guard interval length matching a data guard interval length supported by the terminal from the beacon frame, and performs data communication with the access device by using the available guard interval length. By using the present invention, data communication between the access device and the terminal can be implemented when the access device supports multiple data guard interval lengths.

Abstract: The present invention relates to a Vehicle-to-X (V2X) operation method performed by a V2X terminal in a wireless communication system. Provided is the method comprising: receiving, from a base station, unicast data and multicast data, and transmitting, to the base station, an acknowledgment (ACK)/negative acknowledgement (NACK) for the unicast data and ACK/NACK for the multicast data, wherein the unicast data is data for the V2X terminal and the multicast data is data for a plurality of V2X terminals comprising the V2X terminal.