Abase station apparatus acquires, for a cell formed by the base station apparatus, a list of area identifiers belonging to a tracking area the same as that of the cell and information of an area identifier of a neighbor cell adjacent to the cell, determines whether or not the area identifier of the neighbor cell is included in the list, and notifies a terminal apparatus of information in which information of the neighbor cell and a result of the determining are associated together.

An information transmission method includes obtaining assistance information related to a multicast broadcast service; and determining a priority of a cell reselection frequency based on the assistance information.

A wireless device transmits a message comprising semi persistent scheduling (SPS) assistance information. The SPS assistance information comprises: a logical channel identity associated with an SPS traffic; and a message size associated with the SPS traffic. In response to the SPS assistance information, an activation command indicating an activation of an SPS grant is received. One or more parameters in the SPS grant are based on the SPS assistance information.

A base station receives a first sequence of capability parameters from a wireless device. Each of the first sequence of capability parameters indicate whether a vehicle-to-everything (V2X) transmission is supported in a corresponding frequency band combination of a second sequence of frequency band combinations of the wireless device. The corresponding frequency band combination comprises one or more frequency band identifiers each indicating a specific frequency band. V2X configuration parameters of a cell operating in one of the frequency band combinations on which the wireless device supports the V2X transmission is transmitted.

Embodiments of the present disclosure provide a method, device and computer readable storage medium implemented at a relay device. According to embodiments of the present disclosure, the relay device determines whether a terminal device served by a network slice has to be handed over. In a case of determining that the terminal device has to be handed over, the relay device sends a request for local information to at least one candidate relay device, and the local information includes at least one of information associated with a backhaul link from a candidate relay device to a network device and slice configuration information of the candidate relay device. Based on the received local information, the relay device determines a candidate relay device for handover of the terminal device. According to embodiments of the present disclosure, the relay device determines the candidate relay device to which the terminal device has to be handed over, based at least on the information associated with a backhaul link and the information associated with a network slice, so as to satisfy network slice configuration requirement and ensure backhaul quality of the terminal device.

A disclosure of the present specification provides a method for performing, by a first RAN node, communication related to a network slice. The method may comprise the steps of: receiving, from an AMF, a PDU session resource establishment request message including information regarding a second PDU session; on the basis of the first RAN node not supporting a second network slice, determining to move UE to a second RAN node that supports the second network slice; and on the basis of being determined to move the UE to the second node, transmitting a PDU session resource establishment response message to the AMF.

The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. The present invention relates to conditional cell addition, and a method for adding and changing a primary secondary cell (PSCell) is disclosed. A method performed by a first base station in a wireless communication system according to an embodiment of the present invention comprises the steps of: transmitting a first message for conditional PSCell addition to a second base station, wherein the first message includes a measurement result of a terminal for at least one cell, and the second base station operates the at least one cell; receiving a second message from the second base station as a response to the first message, wherein the second message includes at least one of frequency information related to a candidate target PSCell selected from among the at least one cell or a cell identifier of the candidate target PSCell, as well as configuration information about the candidate target PSCell; determining an execution condition for the conditional PSCell addition related to the candidate target PSCell on the basis of at least one of the frequency information or the cell identifier; and transmitting, to the terminal, a third message including the configuration information about the candidate target PSCell, the execution condition, and information indicating the cell identifier.

Methods, apparatus and systems for cell selection or reselection based on ephemeris and/or configuration information are disclosed. In one embodiment, a method performed by a wireless communication device operating in a non-terrestrial network (NTN), the method including: obtaining configuration information associated with a plurality of candidate cells of the NTN, each of the plurality of candidate cells associated with a respective one of a plurality of candidate satellites; and based on the configuration information, adjusting a ranking of the plurality of candidate cells for cell selection or reselection.

Embodiments of the present disclosure provide a method, device and computer readable storage medium implemented at a relay device. According to embodiments of the present disclosure, the relay device determines whether a terminal device served by a network slice has to be handed over. In a case of determining that the terminal device has to be handed over, the relay device sends a request for local information to at least one candidate relay device, and the local information includes at least one of information associated with a backhaul link from a candidate relay device to a network device and slice configuration information of the candidate relay device. Based on the received local information, the relay device determines a candidate relay device for handover of the terminal device. According to embodiments of the present disclosure, the relay device determines the candidate relay device to which the terminal device has to be handed over, based at least on the information associated with a backhaul link and the information associated with a network slice, so as to satisfy network slice configuration requirement and ensure backhaul quality of the terminal device.

An apparatus for transmitting and receiving signals, the apparatus being applicable to a process of migrating an IAB-node under control of a first donor central unit (donor-CU) from a first distribution unit (DU) to a second DU, and being arranged in the first donor-CU, wherein the apparatus includes a memory, and a processor coupled to the memory and configured to transmit one or more first path migration configurations for an integrated access and backhaul node (IAB-node), and transmit one or more second path migration configurations for a child node, wherein the first path migration configurations correspond to a parent node to which a first candidate cell of the IAB-node belongs, and the second path migration configurations correspond to a parent node to which the second candidate cell of the IAB-node belongs.