An operation method of a first terminal, for synchronized operations according to time-sensitive networking, may comprise: receiving information on a reference time from a base station; obtaining an offset of the first terminal with respect to the reference time or information for deriving the offset, and deriving the offset from the information for deriving the offset; determining a timing at which uplink transmission is performed by reflecting the offset to the reference time; and performing the uplink transmission at the determined timing.

Disclosed are techniques for handling of radio frequency front-end group delays (GDs) for round trip time (RTT) estimation. In an aspect, a network entity determines information indicating a network total GD and a user equipment (UE) determines information indicating a UE total GD. The network entity transmits one or more RTT measurement (RTTM) signals to the UE, each including a RTTM waveform. The UE determines one or more one or more RTT response (RTTR) payloads for one or more RTTR signals, each including a RTTR waveform. The UE transmits the RTTR signal(s) to the network entity. For each RTTR signal, a transmission time of the RTTR waveform and/or the RTTR payload is/are determined based on the UE total GD. The network entity determines a RTT between the UE and the network entity based on the RTTM signal(s), the RTTR signal(s), and the information indicating the network total GD.

Embodiments include methods for a network node in a RAN to support timestamping of time-sensitive network (TSN) messages received by a UE. Such methods include sending one of the following information to the UE for use in timestamping of TSN messages: a second indication of one of multiple available downlink propogation delay (DL PD) compensation methods that is selected by the network node the UE; or a DL PD compensation value, determined by the network node based on one of the available DL PD compensation methods selected by the UE on a different one of the available DL PD compensation methods selected by the network node for the UE. Such methods also include sending, to the UE proximately after sending the information, an indication of a system clock time, associated with the RAN, to be compensated by the UE based on the information.

The transmission and reception group delay in a front end structure of a mobile device may be determined using closed loop calibration. The closed loop may be a near field radiated closed loop between pairs of antennas in an antenna array of the mobile device. The delay based on time of transmission and time of reception may be measured for a plurality of pairs of antennas, from which the transmit and receive group delay within a single path may be determined. The propagation delay of the signal between antennas may be included in the group delay calibration for increased accuracy. In another implementation, a conducted closed loop, e.g., in the transceiver or in a radio frequency switching network may be used to calibrate the group delay. Pre-characterization of the delay caused by components between the closed loop and antennas may be included in the group delay calibration for increased accuracy.

The present disclosure provides a method for transmitting and receiving a synchronization signal block in a 5G system, and a device for transmitting and receiving a synchronization signal block in a 5G system. The method for transmitting includes: determining a position of a synchronization subframe, the synchronization subframe being configured to transmit the synchronization signal block, and the synchronization signal block comprising at least a signal for measurement; and transmitting the synchronization signal block according to the position of the synchronization subframe within a minimum period for the uplink/downlink configuration in a LTE system. Embodiments in the present disclosure are configured to transmit the synchronization signal block with a smaller interference between different systems.

Ranging operations may be performed between an initiator device and a responder device using data frames as opposed to fine timing measurement (FTM) frames or Null Data Packet (NDP) frames. An initiator device may request the responder device to perform a ranging operation. The responder device may transmit a data frame to the initiator device and may receive an acknowledgement (ACK) frame from the responder device. The responder device may transmit a second data frame to the initiator device that includes ranging measurement information for the previous message exchange, including a time of departure of the data frame and a time of arrival of the ACK frame. Because data frames are encrypted, the ranging measurement information is provided in a secure manner. Moreover, by including the ranging measurement information in data frames, throughput for the ranging procedure is improved.

In an aspect, a UE obtains a plurality of positioning reference signal (PRS) configurations. The UE receives, from a BS, an L1 or L2 message that indicates one of the plurality of PRS configurations, which in turn triggers an aperiodic or semi-periodic PRS procedure in accordance with the indicated PRS configuration.

In an aspect, a BS transmits PRS on a first frequency-domain resource during a measurement period. A UE measures the PRS, and transmits a RS-P (e.g., SRS-P) on a second frequency-domain resource that does not overlap with the first frequency-domain resource in frequency.

The disclosure provides a method of channel scheduling for narrowband Internet of Things (NB-IoT) in a non-terrestrial network (NTN) and a user equipment using the same. The method includes: transmitting an uplink signal ending in a first subframe; determining a monitoring window starting from a second subframe according to the first subframe and a time offset; and monitoring a downlink signal corresponding to the uplink signal according to the monitoring window.

The disclosure provides a service transmission method and device. The method includes: a base station acquires a service transmission pattern provided by a sender, the service transmission pattern at least including one of the following information: starting time of a service transmission, ending time of the service transmission, a service transmission period or interval, a service transmission time length in each transmission period, a data packet size or Guaranteed Bit Rate (GBR) in each transmission period and a service transmission delay requirement; the base station pre-configures a transport resource according to the service transmission pattern; the base station acquires user data provided by the sender, the user data containing a taking-effective time point of a service at a destination end; and the base station transmits the user data to the destination end through the transport resource before the taking-effective time point. In the disclosure, a corresponding transport resource is pre-configured for a terminal according to a service transmission pattern, so that a service transmission delay between each node may be controlled, and it may be ensured that a service reaches a destination end before taking-effective at the destination end.