A method and an apparatus for transmitting/receiving signals in a wireless communication system, according to one embodiment of the present invention, perform a 2- or 4-step random access process in a shared spectrum. In a method for interpreting an FDRA field for PUSCH transmissions corresponding to an RAR in a 4-step random access process or a fallback RAR in a 2-step random access process, the FDRA field is truncated to its X LSB, or the FDRA field is padded with Y MSB, on the basis of whether interlace allocation for a PUSCH for access to a shared spectrum channel is provided, and the FDRA field is interpreted as the FDRA field of downlink control information (DCI) format 0_0.

In a communications system which complies with LTE including a base station which transmits data by using an OFDM (Orthogonal Frequency Division Multiplexing) method as a downlink access method, and a mobile terminal, in a case in which an uplink scheduling request signal is transmitted by using an S-RACH when an Ack/Nack signal is being transmitted by using an Ack/Nack exclusive channel, the transmission of the Ack/Nack signal is stopped while the uplink scheduling request signal is transmitted.

An access point (AP) generates a multi-user request to send (MU-RTS) frame for protecting a channel bandwidth during a communication exchange, and transmits the MU-RTS frame in multiple duplicate first packets in respective communication subchannels that span the channel bandwidth. Each first packet has a first packet format that conforms to a legacy protocol. The AP receives multiple clear-to-send (CTS) frames from multiple client stations via respective communication subchannels that span the channel bandwidth. The AP generates a trigger frame configured to prompt the multiple client stations to transmit respective data to the AP. After transmitting the multiple first packets, the AP transmits the trigger frame in one or more second packets that span the channel bandwidth and that conform to a second packet format defined by a non-legacy protocol. The AP receives, from the multiple client stations, data frames that are responsive to the trigger frame.

A method performed by a first wireless access point for coordinating a multi-access point transmission in a wireless network of multiple access points includes receiving an indication of a transmit opportunity for the first wireless access point, transmitting at least one indication frame to the multiple access points comprising information related to the transmit opportunity, receiving at least one request frame from one or more access points of the multiple access points indicating participation with the transmit opportunity, and transmitting a trigger frame to the one or more access points that indicated participation with the transmit opportunity, wherein the trigger frame comprises information indicating respective power levels for the participating access points. The shared transmit opportunity may then be used to transmit downlink data to associated stations of the first wireless access point and the other participating access points during the transmit opportunity.

A wireless communication method performed by a first apparatus includes acquiring a transmit opportunity (TXOP) to transmit or receive a first physical layer protocol data unit (PPDU), identifying a second apparatus for sharing the TXOP, permitting at least one of transmission and reception of a second PPDU to the second apparatus in the shared TXOP, and transmitting the first PPDU to at least one third apparatus in the shared TXOP or receiving the first PPDU from the at least one third apparatus.

The present disclosure relates to a communication technique for converging IoT technology with a 5G communication system for supporting a higher data transmission rate beyond a 4G system, and a system therefor. The present disclosure may be applied to an intelligent service (for example, a smart home, a smart building, a smart city, a smart car or connected car, health care, digital education, retail business, a security and safety-related service, etc.) on the basis of 5G communication technology and IoT-related technology. The present disclosure discloses a method and device for transmitting uplink data.

Provided is a communication device that performs multi-link operation by synchronous transmission.

A communication device includes a communication unit that performs communication by a first link and a second link, and a control unit that controls a communication operation by the communication unit, in which the control unit sets an occupancy period of the second link on a basis of transmission suppression information of the first link. When a remaining time of a transmission suppression period of the first link is longer than a first threshold, the control unit performs control to set an occupancy period of the second link until the transmission suppression period of the first link ends and transmit a data frame by the second link.

Methods and systems are provided for processing received messages from the V2X network. The method may allow the vehicle to identify high priority messages and send them to the upper layers for further processing without any feedback mechanism from the upper layers. The method may ensure that the system processes all high priority messages even during high load and high congestion scenarios by intelligently selecting the messages that should be dropped at lower layers so, that the load at the processor is not increased thus controlling the system behavior in high load conditions. This avoids dropping of high priority messages due to the system not being able to handle the rate at which the messages are being received.

A wireless device may support a plurality of channel state information (CSI) processes. The wireless device may send an indication of a number of supported CSI processes to a first base station. The first base station may send to the wireless device a handover command, instructing the wireless device to handover to a second base station. The handover command may comprise configuration parameters for CSI processes associated with the second base station. The configuration parameters may be based on the number of CSI processes supported by the wireless device.

An access point apparatus transmit, to another access point apparatus, a trigger frame for triggering communication complying with an IEEE802.11 standard series between the other access point apparatus and a station apparatus, which includes information indicative of a frequency channel to be used for the communication.