A system, method and apparatus for mobile communications including sidelink transmissions is provided. A user equipment (UE) maintains a first interface between the first UE and a radio access network (RAN) infrastructure node, a second interface between the first UE and a second UE and a third interface between the first UE and a satellite node or an airborne node. The UE switches between interfaces according to a current connectivity state and based on signal attributes associated with individual interfaces.

According to some embodiments, a method performed by a network node comprises: mapping a first cell identifier associated with the network node to a second cell identifier associated with a first geographical coverage location of a beam transmitted by the non-geostationary satellite; broadcasting the first cell identifier to one or more wireless devices in the first geographical coverage location; and transmitting the second cell identifier to a core network node as part of location information for one of the one or more wireless devices in the first geographical coverage location.

Satellite communication systems and methods are disclosed herein. In an embodiment, a satellite communication system includes a user terminal and a gateway. The user terminal includes a terminal antenna and a terminal controller. The terminal antenna enables the user terminal to communicate via each of a first satellite and a second satellite. The gateway includes a gateway antenna and a gateway controller. The gateway antenna enables the gateway to communicate with the user terminal via each of the first satellite and the second satellite. At least one of the terminal controller and the gateway controller is configured to adjust a queue management policy during a handover operation from the first satellite to the second satellite.

Embodiments of the present disclosure provide a communication method and an apparatus. The method includes: performing, by a relay device, handover from a first cell to a second cell and establishing a connection with the second cell, where the relay device maintains a connected state with the first cell before the connection with the second cell is established successfully; sending, by the relay device, indication information to a terminal device, where the indication information is used to indicate that the relay device establishes the connection with the second cell.

A method performed by a wireless device for cell reselection includes identifying a non-terrestrial network (NTN) providing coverage for the wireless device. The wireless device receives a parameter from a network node. The parameter includes an indication to search for a terrestrial network (TN) though the NTN provides coverage for the wireless device. Based on the parameter, the wireless device searches for the TN and prioritizes the TN over the NTN when selecting the TN for cell reselection.

An electronic device, a wireless communication method, and a computer-readable storage medium. The electronic device comprises a processing circuit, configured to: determine parameters of a sleep mode of a user device according to information related to uplink data of the user device, parameters of the sleep mode comprising the duration of a sleep window, the duration of a data transmission window, and the start time of a first data transmission window; and send the parameters of the sleep mode to the user device, to enable the user device to alternate, according to the parameters of the sleep mode and in the time domain, between the data transmission window and the sleep window.

The embodiments of the present disclosure provide a wireless communication method, a terminal device, and a network device. The network device can learn a difference between propagation delays from a serving satellite and a neighbor satellite to a terminal, thereby optimizing neighbor cell measurement configuration. The wireless communication method includes: transmitting, by a terminal device, first information including at least one of: signal propagation distance information from a serving satellite and a neighbor satellite of the serving satellite to the terminal device; signal propagation delay information from the serving satellite and the neighbor satellite of the serving satellite to the terminal device; or signal quality of the serving satellite and/or at least one neighbor satellite of the serving satellite as measured by the terminal device.

Various solutions for satellite access network (SAN) or non-terrestrial network (NTN) measurement within overlapping gaps with respect to user equipment and network apparatus in mobile communications are described. An apparatus may receive configurations of a first measurement gap and a second measurement gap. The apparatus may determine whether the first measurement gap and the second measurement gap are non-fully overlapping or fully overlapping. The apparatus may perform measurements within the first measurement gap and the second measurement gap according to a priority in an event that the first measurement gap and the second measurement gap are non-fully overlapping. The apparatus may perform measurements within an extended measurement period in an event that the first measurement gap and the second measurement gap are fully overlapping.

A mobility management method includes: obtain a terminal a first position of a terminal from a geo-synchronous orbit (GEO) positioning satellite; the terminal searches for a first communication calendar according to the first position, and determines a network connection mode of the terminal; when it is determined that the network connection mode is an NGSO satellite connection, the terminal accesses a network by means of a first NGSO satellite and sends, by means of the first NGSO satellite, a first request message carrying the first position to the network.

A cell selection method and apparatus. The method includes receiving, by a terminal, a handover command, where the handover command includes indication information indicating a polarization direction of a target cell to be accessed by the terminal, performing, by the terminal, cell handover based on the handover command.