Accordingly, embodiments disclosed herein provide a method for managing inter network switching by a User Equipment (UE) in a wireless communication system. The method includes determining that the UE is in data communication with a first network, determining that a signaling packet data network (PDN) is established for transmitting a Link Switch Message (LSM) for the inter network switching during the data communication with the first network, ignoring to perform a search for a second network until the signaling PDN is established for the first network and establishing the signaling PDN for the first network. Further it provides the method for detecting the condition of retransmission of LSM and provides method to avoid data loss and signaling overhead during inter-network switching.

A method for moving between communications systems and an apparatus, where the method includes: receiving, by a user equipment (UE), a first message, where the first message is used to set up or modify a first evolved packet system (EPS) bearer for the UE in the first communications system, and the first message includes first quality of service (QoS) flow information that is of the second communications system and corresponds to the first EPS bearer; storing, by the UE, the first QoS flow information; moving, by the UE, from the first communications system to the second communications system; and determining, by the UE based on a first condition, QoS flow information used by the UE in the second communications system, where the first condition includes the first QoS flow information.

This disclosure provides systems, methods and apparatuses for a user equipment (UE) performing Listen Before Talk (LBT) procedures during a handover, such as during a dual active protocol stack (DAPS) handover or a conditional handover. During the handover, the UE may have a source connection with a source cell. If the source cell is unlicensed, the UE may perform LBT for a channel of the source cell. The UE may establish a target connection with a target cell before releasing the source connection with the source cell. If the target cell is unlicensed, the UE may perform LBT for a channel of the target cell.

Aspects of the present disclosure implement techniques of a new 3D waveform coding scheme that leverages the spatial properties of 5G NR systems. Specifically, in 5G systems, each UE location may be characterized by three parameters: propagation delay (t.sub.p), angle of elevation (θ), and angle of azimuth (φ). Global coding matrix may be generated by linear combination of these three attributes and a unique lattice code may be generated for each UE at different locations from the base station. Thus, considering the coding gain increases with increasing the distance between the codes, aspects of the present disclosure take advantage of geometrical properties of lattice. Particularly, within the 3D waveform coding, if lattice distance between co-beamed UEs is determined to be greater than threshold radius, a conjugate lattice code for the UEs may be applied in accordance with aspects of the present disclosure.

A user entity (UE) such as a smartphone is configured to connect to both WiFi and a Long Term Evolution (LTE) cellular network for voice and data services. For voice, the UE supports both Voice over LTE (VoLTE) and Voice over WiFi (VoWiFi). When the UE is connected to VoWiFi and roaming from a first WiFi access point to a second WiFi access point, the UE and Mobility Management Entity in the cellular network carry out a preparatory handover to VoLTE to prevent service loss in the event of an unsuccessful VoWiFi connection from the second WiFi access point.

Embodiments of the present application relate to a wireless communication method, a terminal device and a network device. The method is applied in a handover process without random access and includes: sending, by a terminal device, first information to a network side, the first information including index information corresponding to a first downlink beam of a target base station, and the first downlink beam being used for downlink communication between the target base station and the terminal device.

A communication device, user terminal, communication system, notification method, and program for handover connections is provided. The communication device may specify a type of handover used to request a communication handover executed by a user terminal, and may notify a user terminal of information related to a specified interface handover type.

[Object] To enable the wireless communication that is being performed already to be continued in the secondary system. [Solution] Provided is a communication control device including: a recognizing unit configured to recognize a handover of a wireless communication device, the handover enabling the wireless communication device to communicate wirelessly through a frequency channel for a primary system in a secondary system that secondarily utilizes the frequency channel; and a control unit configured to control the handover of the wireless communication device.

Embodiments herein relate to a method performed by a radio network node of a communication network. The communication network comprises a first set of functionalities belonging to a first network slice of a first core network node, and a second set of functionalities belonging to a second network slice of a second core network node or the first core network node. The radio network node obtains paging identities comprising first and second paging identities of a wireless device; receives a paging indication for the wireless device from the second network slice; initiates a matching process for matching the second paging identity in the paging indication to the paging identities for locating context of the wireless device; and pages, upon a match of the matching process, the wireless device, for communication with the second network slice, using the context.

A base station switching method for a source base station includes: receiving a measurement report sent by the unmanned aerial vehicle, wherein the measurement report comprises information used for indicating a target base station to which the unmanned aerial vehicle requests to switch; when determined to switch to the target base station according to the measurement report, sending a switch request carrying first information to the target base station, wherein the first information is used to indicate that a terminal requesting the switch is an unmanned aerial vehicle; when receiving a handover request acknowledge returned by the target base station, performing a switching operation from the source base station to the target base station. As such, the source base station achieves a base station switch for an unmanned aerial vehicle, ensures continuity of service for the unmanned aerial vehicle, and broadens the application range of the unmanned aerial vehicle.