A communication unit for implementing an operation for CIoT in 5GS and a communication unit for mapping a connection associated with the function for CIoT to an appropriate connection in a handover between the 5GS and EPS are provided. Even in the 5GS supporting a network slice, a communication unit for allowing the operation for CIoT to be used is provided. Furthermore, a communication unit for mapping a PDN connection associated with the operation for CIoT and established in the EPS to an appropriate PDU session in a handover of user equipment from the EPS to the 5GS is provided. Furthermore, a communication unit for mapping a PDU session established in the 5GS to an appropriate PDN connection in the handover of the user equipment from the 5GS to the EPS is provided.

A handover method and apparatus, where the method includes: determining, by a first control plane function network element, at least one bearer that needs to be established when a protocol data unit (PDU) session of a terminal in a first network is to be switched to a packet data network (PDN) connection in a second network; and obtaining, by the first control plane function network element, tunnel information of the PDN connection, where the tunnel information of the PDN connection includes user plane tunnel information corresponding to each of the at least one bearer.

Embodiments of the present disclosure disclose a mobility management method, apparatus, and system, and pertain to the field of wireless communications technologies. The method includes: determining, by a first mobility management entity based on information about a PDN connection established by user equipment in a 4G network, a network slice corresponding to the PDN connection, and then determining, with reference to a subscribed network slice of the user equipment, a network slice allowed for the user equipment.

A radio controller entity is in communication with a centralized control plane entity of a disaggregated base station, or with a monolithic base station, the disaggregated base station or monolithic base station serving wireless user equipment in a wireless network. The radio controller entity obtains from the centralized control plane entity or from the monolithic base station, a context associated with one or more user equipment served by the disaggregated base station or the monolithic base station. The radio controller entity determines a policy to be set. The policy defines a set of one or more rules, each rule including a condition and an action. The rule may include that the base station should query the radio controller for an instruction as to which action(s) to apply. The radio controller entity provides the policy to the centralized control plane entity or to the monolithic base station.

Aspects of the disclosure relate to mechanisms for interworking between legacy and next generation radio access technologies (RATs) in a communication network. In some examples, a connectivity request originated by a user equipment towards a next generation core network may be processed by the next generation core network. The next generation core network may then provide the user equipment an indication of whether the next generation core network supports an inter-RAT handover between the next generation RAT and a legacy RAT.

An approach is described for a user equipment (UE) to provide vehicle-to-everything (V2X) communication. The UE includes processor circuitry that generates a registration request message in a protocol for a cellular network, a V2X policy provisioning request and an indication of PC5 radio access technology (RAT) capability for V2X. The UE also includes a transmitter that transmits the registration request message, the V2X policy provisioning request and the indication of PC5 radio access technology (RAT) capability for V2X to an Access and Mobility Management Function (AMF) in the cellular network.

A user equipment (UE) is described that includes a PDCCH receiver configured to receive a PDCCH with a DCI format, the PDCCH scheduling a first physical uplink shared channel (PUSCH) in subframe n and a second PUSCH in subframe n+1, the DCI format including an information field for indicating that a starting position of the first PUSCH is later than an initial boundary of an initial symbol of the subframe n. The UE also includes a channel sensor configured to perform a first channel access before the first PUSCH. The UE further includes a PUSCH transmitter configured to transmit the first PUSCH and the second PUSCH, in a case when the first channel access is successful. The channel sensor is further configured to, in a case when the first channel access is not successful, perform a second channel access before the second PUSCH.

A method and apparatus for performing a membership verification or an access control in a wireless communication system is provided. A mobility management entity (MME) performs the membership verification or the access control of a user equipment (UE), and transmits verified UE membership information to a target HeNB.

Where a user equipment (UE) device transfers communication from a first radio access network (RAN) device to a second RAN device, the first RAN device receives a traffic offload indicator indicating that resources being used for data traffic for the UE device through the first RAN device are released because the data traffic communication has been transferred to the second RAN device. The first RAN device provides assistance parameters to the UE device that are determined at least partially based on the information that the data traffic communication has been transferred to the second RAN device. The UE device uses the assistance parameters in determining when to transfer data traffic RAN between the first RAN device and the second RAN device.

Wireless communications systems and methods related to communications in a wireless network during handover and/or dual connectivity operations are provided. A user equipment (UE) transmits, to a first base station (BS), a first communication signal based on a first time-division multiplexed (TDM) configuration. The UE transmits, to a second BS different from the first BS, a second communication signal, the second communication signal being multiplexed with the first communication signal based on the first TDM configuration. The UE transmits, to the first BS, a third communication signal based on a second TDM configuration different from the first TDM configuration. The first TDM configuration and the second TDM configuration are associated with a handover from the first BS to the second BS. The UE transmits, to the second BS, a fourth communication signal, the fourth communication signal being multiplexed with the third communication signal based on the second TDM configuration.