A wireless communication method, performed by a User Equipment (UE) for an uplink (UL) Physical Random Access Channel (PRACH) transmission, includes receiving a Downlink Control Information (DCI) from a network (NW); and performing the UL PRACH transmission to the NW in response of receiving the DCI, wherein the DCI indicates a Physical Downlink Control Channel (PDCCH) order, and the PDCCH order is associated with a scheduling offset from the NW for the UE performing the UL PRACH transmission.

Aspects of the disclosure are directed to a random access method that can include determining first information that indicates a random access configuration of a satellite cell. The random access method can further include sending the first information.

The present invention improves transmission efficiency in wireless communication. In the present invention, a terminal comprises a reception circuit for receiving control information for adjusting an uplink transmission frequency, and a control circuit for controlling the transmission frequency on the basis of the control information.

Provided are a method for determining a time-domain resource of uplink transmission, and a terminal device, a network device and a computer-readable storage medium, which are used to avoid an increase in the more signaling overheads and can achieve accurate control over a slot offset of uplink transmission. Also provided is a terminal device determining, according to whether the terminal device has a timing advance (TA) pre-compensation capability, a target slot offset used for uplink scheduling.

A method and an apparatus for performing a random access procedure in a wireless communication system are disclosed. A method of performing a random access procedure according to an embodiment of the present disclosure may include receiving, from a base station, configuration information for providing information needed for the terminal to access the wireless communication system via a non-terrestrial network (NTN) including a satellite, wherein the configuration information includes first information for adjusting an orbit of the satellite and second information on common timing advance (TA); and determining a terminal-specific TA value for the terminal based on a location of the terminal and the configuration information; and transmitting, to the base station, a first message for the random access procedure at a timing determined based on the terminal-specific TA value and a common TA value derived from the second information.

Various solutions for satellite access network (SAN) or non-terrestrial network (NTN) measurement and data scheduling with respect to user equipment and network apparatus in mobile communications are described. An apparatus may determine whether to perform a measurement outside a measurement gap for a neighboring cell. The apparatus may apply a scheduling restriction within a time period in an event that the measurement is determined. The apparatus may transmit uplink symbols or receiving downlink symbols outside the time period with the scheduling restriction.

Apparatuses, methods, and systems for connecting a wireless device across multiple wireless networks are disclosed. One system includes a state machine and a router. The state machine operates to maintain a network availability of each of a plurality of wireless networks for a wireless device, wherein each of the plurality of wireless networks include network characteristics. The router operates to select a one of the plurality of wireless networks based on the network availability and the network characteristics as maintained by the state machine, process data packets according to the selected available wireless network based on the network characteristics of the selected available wireless network, and route the processed data packets to the wireless device through the selected one of the plurality of wireless networks.

Examples pertaining to handling of multiple tracking area identifiers (TAIs) in satellite access in mobile communications are described. A user equipment (UE) initiates a procedure with a satellite-accessing cell of a network. The UE constructs a TAI or a plurality of TAIs, as a list of TAIs, of the cell depending on whether the broadcasts one or more than one tracking area codes (TACs) per public land mobile network (PLMN). The UE receives either a reject message or an accept message from the network responsive to initiating the procedure.

A disclosure of this specification provides a method for radio communication, performed by a user equipment (UE). The method is comprising: transmitting a random access preamble to an NTN (Non-Terrestrial Network) cell; receiving a random access response from the NTN cell; searching for a TN (Terrestrial Network) cell with a period T, wherein the T is determined based on i) distance between location of the UE and reference location of the TN, ii) signal power from the TN cell and iii) service time of the NTN cell.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine a scaling factor for a UE measurement period based at least in part on the UE being associated with a non-terrestrial network (NTN). The UE may perform a measurement during a scaled UE measurement period based at least in part on the scaling factor and the UE measurement period. Numerous other aspects are described.