Techniques discussed herein can facilitate inactive state transmissions for a Base Station (BS) via a 4-step or 2-step inactive state RACH process. One example aspect is a BS comprising: communication circuitry; and one or more processors communicatively coupled to the communication circuitry and configured to: receive, via the communication circuitry, a message 1 (Msg1) or a message A (MsgA) preamble based on a Random Access Channel (RACH) configuration for a Radio Resource Control (RRC) inactive data transmission; receive, via the communication circuitry, a message 3 (Msg3) or a MsgA Physical Uplink Shared Channel (PUSCH) comprising uplink (UL) data via configured resources; and transmit, via the communication circuitry, a message 4 (Msg4) or a message B (MsgB) in response to the Msg3 or the MsgA PUSCH.

A method of operating a digital radio transmitter device in accordance with a predetermined communication protocol defining a transmission timing tolerance. The method comprises: transmitting a plurality of first periodic transmissions in accordance with said predetermined communication protocol having a first period and an inherent timing uncertainty less than said transmission timing tolerance; performing a plurality of second periodic actions with a second period wherein said first and second periods are equal to each other or an integer multiple of each other; and adjusting a timing of one or more of the first periodic transmissions by an amount greater than said inherent timing uncertainty but less than or equal to a difference between said inherent timing uncertainty and said transmission timing tolerance so as to change said first period temporarily by an amount less than or equal to said transmission timing tolerance, thereby changing an offset between said first transmissions and said second actions.

Certain aspects of the present disclosure provide techniques for communicating segment-based pre-compensated uplink signals in a non-terrestrial network. A method that may be performed the UE includes transmitting capability information indicating whether the UE needs time gaps between transmission segments associated with uplink signals to be transmitted by the UE in a non-terrestrial network (NTN), obtaining, based at least in part on the capability information, configuration information configuring the time gaps between the transmission segments associated with the uplink signals to be transmitted by the UE, and transmitting the uplink signals in one or more transmission segments based on the configuration information.

Apparatuses, methods, and systems for dynamically estimating a propagation time between a first node and a second node of a wireless network are disclosed. One method includes receiving, by the second node, from the first node a packet containing a first timestamp representing the transmit time of the packet, receiving, by the second node, from a local time source, a second timestamp corresponding with a time of reception of the first timestamp received from the first node, calculating a time difference between the first timestamp and the second timestamp, storing the time difference between the first timestamp and the second timestamp, calculating a predictive model for predicting the propagation time based the time difference between the first timestamp and the second timestamp, and estimating the propagation time between the first node and the second node at a time by querying the predictive model with the time.

According to some embodiments, a method performed by a wireless device capable of operating in a time sensitive network (TSN) comprises obtaining a time synchronization capability of the wireless device and transmitting an indication of the time synchronization capability to a network node. In particular embodiments, the time synchronization capability comprises one or more of a downlink receive tracking accuracy supported by the wireless device, a receive to transmit relative timing accuracy supported by the wireless device, an internal timing accuracy supported by the wireless device, and a propagation delay (PD) compensation method selection capability supported by the wireless device.

Disclosed are techniques for handling of radio frequency (RF) front-end group delays for roundtrip time (RTT) estimation. In an aspect, a network node transmits first and second RTT measurement (RTTM) signals to a user equipment (UE) and receives first and second RTT response (RTTR) signals from the UE. The network node measures the transmission times of the RTTM signals and the reception times of the RTTR signals, and the UE measures the transmission times the RTTM signals and the transmission times of the RTTR signals. The group delays of the transmit/receive chains of the network node and the UE are determined for one set of transmit/receive chains based on the first RTTM signal and first RTTR signal. The group delays of the transmit/receive chain used for the second RTTM signal and the second RTTR signal are determined relative to the group delay of the one set of transmit/receive chains.

In one aspect, a method includes performing, by a wireless station, a fine timing measurement (FTM) procedure that includes exchanging one or more FTM messages between the wireless station and an access point to obtain a first round-trip time (RTT) between the wireless station and the access point. The method also includes performing, by the wireless station, a non-FTM procedure to obtain a second RTT between the wireless station and the access point. The wireless station then calculates a turn-around calibration factor (TCF) estimate of the access point based on a difference between the second RTT and the first RTT. Data representative of the TCF estimate of the access point may then be sent to a server.

In a wireless communication method, a terminal device obtains a first uplink (UL) alignment timer, where the first UL alignment timer corresponds to a first timing advance group (TAG), the first TAG corresponds to a first serving cell group, the first serving cell group comprises at least one serving cell, and the first UL alignment timer is used for UL synchronization maintenance for the at least one serving cell in the first serving cell group.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a base station, a compensation indicator that is based at least in part on Doppler information associated with a group of UEs in a single frequency network (SFN). The UE may communicate based at least in part on the compensation indicator. Numerous other aspects are described.

This disclosure provides systems, methods, and apparatus for reducing or avoiding interference between communications of one base station-user equipment pair and communications of another base station-user equipment pair. A first user equipment can monitor a timing offset between the communications and send the timing offset to a first base station that services the first user equipment. The first base station time advances a window of time during which it receives uplink signals from the first user equipment. The base station also sends a time advance value and instructions to the first user equipment to advance a window of time during which the first user equipment transmits uplink signals to the first base station. The timing advance value is based on the timing offset value determined by the first user equipment. Thus, a gap period between uplink and downlink windows is increased, thereby reducing interference.