Provided are an information indication method and apparatus, a device and a storage medium. The information indication method includes: dividing beam identifier (ID) information into first beam ID information and second beam ID information according to a preset rule, where the first beam ID information and the second beam ID information are used for instructing a second node to obtain the beam ID information based on the preset rule; carrying the first beam ID information on a first resource and transmitting the first beam ID information to the second node; and carrying the second beam ID information on a second resource and transmitting the second beam ID information to the second node.

Appropriate timing control is realized in accordance with propagation delay between a terminal and a base station. This terminal includes: a control unit that controls a transmission timing on the basis of first information relating to control of transmission timing of signals in a transmission increment of the signals, and second information relating to control of transmission timing in a finer increment than in the transmission increment; and a wireless transmission unit that performs signal transmission on the basis of control of the transmission timing by the control unit.

This application provides a communication method and apparatus. The method includes: A terminal device receives first indication information, where the first indication information includes a common timing advance of at least one candidate cell, and the first indication information is used to inform the terminal device that the at least one candidate cell is in a handover allowed state; and the terminal device sends a random access preamble to a target candidate cell based on a first timing advance, where the target candidate cell is one of the at least one candidate cell, and the first timing advance is a common timing advance of the target candidate cell. According to the method provided in this application, the UE can send the preamble more accurately in a handover scenario.

This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for managing beam configurations and parameters for non-terrestrial networks. In some implementations, a UE may detect a synchronization signal block (SSB) transmitted by a satellite via a first beam. Aspects of the present disclosure recognize that each beam may be identified by a unique SSB index based at least in part on a time or frequency on which the SSB is received. Thus, the SSB may be identified based on a frequency-domain SSB index or a time-domain SSB index. The UE may further determine one or more wireless communication parameters associated with the first beam. The UE may generate a mapping between the SSB and the wireless communication parameters associated with the first beam, and thereafter communicate with the satellite using the mapping.

Disclosed are a transmission delay indication method and device. In the embodiments of the present disclosure, a network device determines a common transmission delay of at least one cell, and sends the common transmission delay to a terminal in the at least one cell. The common transmission delay is used for the terminal in the at least one cell to determine a transmission timing sequence with a network side.

The present disclosure relates to communication methods and apparatus, which are particularly applied to a non-terrestrial network. In one example method, a terminal device determines a first duration, and determines a timing advance amount based on the first duration, where the timing advance amount is used for communication between the terminal device and a network device.

A high-altitude platform (HAP) node provides communication service during an emergency. The HAP node uses a first network to provide communication services for handling calls initiated by at least one user equipment (UE). The HAP node detects that an emergency disruption has occurred that prevents the use of the first network. In response to detecting the occurrence of the emergency disruption, a mobile terminal (MT) in the HAP node searches for a second network able to accept emergency calls. The HAP node determines whether the second network will handle all calls initiated by the at least one UE or only emergency calls generated by the at least one UE. The HAP node handles the calls based on the determining and through the use of the second network.

A method performed by a user equipment (UE) for maintaining uplink (UL) synchronization in a non-terrestrial network (NTN) is provided. The method includes receiving, from a base station (BS), a system information block (SIB) indicating a duration of a timer for the UL synchronization in the NTN; determining whether an epoch time is provided in the SIB; starting or restarting the timer with the duration at a time determined according to whether the epoch time is provided in the SIB; and determining that the UE has lost the UL synchronization upon an expiration of the timer.

The embodiments of the present application relate to a cell measurement method, a terminal device, and a network device, and can ensure the effective execution of cell measurement. The cell measurement method comprises: a terminal device acquires a target start time of a synchronisation block measurement timing configuration SMTC for a cell list and/or a target start time of the measurement interval; and, on the basis of the target start time of the SMTC and/or the target start time of the measurement interval, the terminal device measures at least one cell in the cell list.

This application provides a signal transmission method and an apparatus. A network device broadcasts a navigation reference signal and a communication signal. A terminal device may determine its position information based on the navigation reference signal. A communication sequence in the communication signal and a navigation sequence in the navigation reference signal are coupled by using a same even-number-stage m-sequence, so that the terminal device is supported in completing an integrated communication and navigation function based on the broadcast signal.