Methods and apparatuses for optimization of RACH procedure in non-terrestrial network are disclosed. A method comprises transmitting a preamble on a RACH resource from an uplink time slot, which is a first time advance before corresponding downlink time slot; and monitoring a control signal from a first time offset after the end of the transmission of the preamble.

This patent document describes, among other things, techniques, and apparatuses for providing non-terrestrial network connectivity to improve wireless network efficiency and performance. In one aspect, a method of wireless communication is disclosed. The method includes transmitting, from a network node to a user device, a block of system information that includes system information that is time varying due to at least one of movement of the network node or movement of the user device.

A user equipment (UE) accesses a public land mobile network (PLMN) and obtains an address of a server and authorization data. The UE sends the server a request for coverage data based on the address and including the authorization data. After verifying the authorization data, the server sends the coverage data to the UE, which enables the UE to determine whether access to the PLMN is possible at one or more locations of the UE, at one or more future times, and using one more radio access technologies (RATs), including non-terrestrial network (NTN) RAT(s) and/or terrestrial network (TN) RAT(s). The authorization data may include a temporary identifier for the UE that may be ciphered and may enable verification of the authorization data. The request for coverage data may indicate signal levels needed by the UE to access the NTN and TN RATs and the locations and the future times.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a non-terrestrial network (NTN) entity, a message that is associated with an uplink grant. The UE may select, based at least in part on the message, either a cell-specific offset or an updated offset that is indicated after initial access, as a timing offset that accounts for a propagation delay between a base station of the NTN and the UE. The UE may transmit, to the NTN entity, an uplink communication using the timing offset. Numerous other aspects are described.

A method of communicating with multiple satellites includes allocating, based on one or more conditions corresponding to a plurality of spatial channels associated with multiple satellites, each subset of a plurality of subsets of antenna resources of a phased array antenna to a respective different satellite included in the multiple satellites. The method also includes commanding one or more transceivers to establish simultaneous communicative connections to the different satellites via the allocated subsets of antenna resources, and re-allocating, based on a detected change to at least one of the one or more conditions, at least one antenna resource to a respective another different satellite. The method also includes commanding the one or more transceivers to maintain the simultaneous communicative connections to the different satellites using the re-allocated at least one antenna resource.

In accordance with an example embodiment of the present invention, a method comprising: receiving from a network node, by a user equipment of a plurality of user equipment associated with more than one communication beam of a communication network, information comprising locations in time of the user equipment during paging occasions with at least one cell of the communication network associated over more than one communication beam, wherein the information identifies any provided order of the more than one communication beam covering the locations in time of the user equipment during the paging occasions; and based on the information, identifying by the user equipment at least one communication beam and timing of at least one paging occasion, of the paging occasions, for the user equipment.

The present disclosure relates to timing advance indication methods, communication apparatuses, and storage medium. In one example method, a first device determines a quantity of extended bits and a location of the extended bit of a timing advance (TA) instruction based on a subcarrier spacing of a second device. The first device sends the TA instruction to the second device, where the TA instruction includes the extended bit, and a quantity of bits of the TA instruction is greater than 12.

The disclosure provides satellite communication methods and related devices. One example method includes generating a random access preamble sequence which includes a cyclic prefix, a sequence part, and a guard interval. The sequence part includes a subsequence A and a subsequence B, or the sequence part includes a subsequence C, and the subsequence C is a time domain superimposed sequence of a subsequence A and a subsequence B. The subsequence A includes at least one preamble symbol, the subsequence B includes at least one preamble symbol, and the subsequence A and the subsequence B are respectively generated by using ZC sequences of different root indexes, a quantity of subsequences A is m, a quantity of subsequences B is m or m−1, and m is a positive integer. The method further includes outputting the random access preamble sequence.

The present disclosure provides a cell measurement method and apparatus, and a device and a storage medium. The method includes: receiving a first measurement configuration, the first measurement configuration including a frequency point to be measured, first configuration information of a first measurement window corresponding to said frequency point, and a whitelist neighbors list, as well as a first starting time offset corresponding to neighbor cells in the whitelist neighbors list; determining a synchronizing signal block (SSB) receiving window corresponding to the neighbor cells in the whitelist neighbors list according to the first configuration information of the first measurement window corresponding to said frequency point and the first starting time offset corresponding to the neighbor cells in the whitelist neighbors list; and measuring each neighbor cell in the whitelist neighbors list based on the SSB receiving window corresponding to the neighbor cells in the whitelist neighbors list.

Example communication methods and apparatus are described. One example method includes receiving first information from a first device, where the first information indicates N moments and location information of the first device at the N moments. The first device obtains second information, where the second information indicates a correspondence between the N moments and M area identifiers, or the second information indicates a correspondence between N locations and M area identifiers. According to the foregoing technical solution, the first device sends the location information of the first device at the N moments, so that the M area identifiers corresponding to the first device at the N moments or the M area identifiers corresponding to N pieces of location information can be obtained.