Methods, systems, and devices for wireless communication are described. A wireless device may perform a listen before talk (LBT) procedure on a channel bandwidth using an energy detection (ED) threshold. The ED threshold being associated with a transmission bandwidth that is narrower than the channel bandwidth. The wireless device may also, responsive to a successful LBT procedure, transmit on the transmission bandwidth according to a frequency hopping pattern during a first channel occupancy time (COT). The frequency hopping pattern comprises a first resource allocation and a second resource allocation different from the first resource allocation.

A wireless device receives one or more configuration parameters indicating a mapping pattern that indicates a cyclical mapping of spatial domain transmission filters to physical uplink shared channel (PUSCH) repetitions. The wireless device receives a downlink control information (DCI) scheduling repetitions of a PUSCH transmission, where the DCI comprises a frequency hopping field set to one and indicates a frequency offset. Based on the frequency hopping field being set to one and the mapping pattern indicating the cyclical mapping, the wireless device sequentially transmits, starting from a first resource block, a first repetition of the PUSCH transmission using a first spatial domain transmission filter and a second repetition using a second spatial domain transmission filter; and sequentially transmits, starting from a second resource block, a third repetition using the first spatial domain transmission filter and a fourth repetition using the second spatial domain transmission filter.

A wireless device receives one or more configuration parameters indicating a mapping pattern that indicates a cyclical mapping of spatial domain transmission filters to physical uplink shared channel (PUSCH) repetitions. The wireless device receives a downlink control information (DCI) scheduling repetitions of a PUSCH transmission, where the DCI comprises a frequency hopping field set to one and indicates a frequency offset. Based on the frequency hopping field being set to one and the mapping pattern indicating the cyclical mapping, the wireless device sequentially transmits, starting from a first resource block, a first repetition of the PUSCH transmission using a first spatial domain transmission filter and a second repetition using a second spatial domain transmission filter; and sequentially transmits, starting from a second resource block, a third repetition using the first spatial domain transmission filter and a fourth repetition using the second spatial domain transmission filter.

A disclosure of the present specification provides a method for selecting, by a user equipment (UE) located outside a coverage of a base station, a neighboring UE with which the UE will perform device-to-device (D2D) communication. According to the method, it is possible to quickly find out whether a neighboring UE is located within the coverage of a base station and is capable of operating as a relay, through a DMRS and a detection signal received from the neighboring UE.

A short range radio communication device and a method of controlling a short range radio communication device may include a processing circuit configured to: determine a time offset between an initial starting point of operation of a transceiver in accordance with a first frequency hopping sequence and a shifted starting point of operation of the transceiver in accordance with the first frequency hopping sequence so that a first segment of a frequency range is exclusive of a second segment of the frequency range; and control at least one of a controller and a clock circuit to operate the transceiver in accordance with the first frequency hopping sequence at the shifted starting point.

A short range radio communication device and a method of controlling a short range radio communication device may include a processing circuit configured to: determine a time offset between an initial starting point of operation of a transceiver in accordance with a first frequency hopping sequence and a shifted starting point of operation of the transceiver in accordance with the first frequency hopping sequence so that a first segment of a frequency range is exclusive of a second segment of the frequency range; and control at least one of a controller and a clock circuit to operate the transceiver in accordance with the first frequency hopping sequence at the shifted starting point.

A communication method and apparatus where the method includes: a network device that receives a random access request from a terminal device; and the network device sends a random access response to the terminal device, where the random access response includes scheduling information of a message 3 that includes first information that a request that the terminal device repeatedly transmit the message 3 by using same transmit power and a same precoding matrix. In response to repeatedly transmitting the message 3, the terminal device with the same transmit power and the same precoding matrix, so that stability of transmission of the message 3 is improved, and a transmission success rate of the message 3 is improved, thereby improving an access success rate of a random access procedure of the terminal device.

Provided are a repetitive transmission method for ultra-low latency and highly-reliable communication in a wireless communication system, and an apparatus therefor. A method for transmitting data by a terminal according to an embodiment of the present invention comprises the steps of: receiving information on the repetition number of transmission for a physical uplink shared channel (PUSCH) from a base station; receiving, from the base station, information on frequency hopping applied to the the PUSCH repetition configuring the the PUSCH repetition; determining a frequency resource for the PUSCH repetition based on the information on the frequency hopping; and performing the the PUSCH repetition.

A radio transmitting device configured to transmit a spread-spectrum radio signal wherein a carrier frequency changes in a predetermined set of radio channels according to a hopping sequence, the radio signal being organized in packets having each a header transmitted at a first channel in the hopping sequence comprising a detection sequence, and payload data encoding a message transmitted at following channels in the hopping sequence.

A radio transmitting device configured to transmit a spread-spectrum radio signal wherein a carrier frequency changes in a predetermined set of radio channels according to a hopping sequence, the radio signal being organized in packets having each a header transmitted at a first channel in the hopping sequence comprising a detection sequence, and payload data encoding a message transmitted at following channels in the hopping sequence.