Disclosed are a method and apparatus for determining a PDU session identity in a wireless communication system. A method for determining, by a session management function (SMF) node, a packet data network (PDU) session identity during handover of user equipment (UE) in a wireless communication system, may include receiving a request message for requesting the establishment of a PDU session for the UE from an access and mobility management function (AMF) node, wherein a handover for the UE from a first wireless communication system to a second wireless communication system has been determined, determining a PDU session identity for the PDU session established for the UE when the request message is received, and sending a response message including the determined PDU session identity to the AMF node in response to the request message.

A WTRU (102) may receive updated assistance information for network slice selection and/or reselection (410). The WTRU may apply local policies to determine when to use the updated assistance information to access a network slice (440). The WTRU may determine whether to contact an existing network slice function (470) or a new network slice function (460) to establish a connection to a network slice. Based on the determination, the WTRU may transmit different information to the network. The network slice selection and/or reselection may be initiated by a WTRU or by a network.

The present invention discloses an inter-RAT cell reselection method, a terminal, and a network side device. The method is: sending, by a terminal, a first request message to a first base station, where the first request message carries first cause indication information, the first cause indication information indicates that the terminal needs to perform a cell reselection process from a second base station to the first base station, the first base station is located in a first radio access technology (RAT) system, the second base station is located in a second RAT system, the terminal is in a first connected mode when connecting to the second base station, and the first RAT system does not support the first connected mode; and receiving, by the terminal, an acknowledgement returned by the first base station for the first request message, and switching the first connected mode into a second connected mode based on the acknowledgement, where the first RAT system supports the second connected mode.

A base station in a first wireless network provides first wireless connectivity to user equipment operated by a subscriber. The first wireless network supports first wireless communications such as non-voice communications. A network management resource receives configuration information assigned to the subscriber operating the user equipment. The configuration information indicates that the subscriber is assigned use of a second wireless network that provides support of second wireless communications (such as voice communications). In response to detecting a trigger event (such as a voice call) indicating a need to switch to use of the second wireless network, the network management resource initiates termination of the first wireless connectivity and establishment of second wireless connectivity between the user equipment and a base station in the second wireless network.

An access network can allocate a bearer for a network service associated with a quality-of-service (QoS) value (QV) and a retention-priority value (RPV), and determine a bearer ID for the service based on the QV, the RPV, and a supplemental priority value (SPV) different from the QV and from the RPV. Upon handover of a terminal, session(s) carried by a bearer allocated by the terminal can be terminated. That bearer can be selected using IDs of the bearers and a comparison function that, given two bearer IDs, determines which respective bearer should be terminated before the other. Upon handover of a terminal to an access network supporting fewer bearers per terminal than the terminal has allocated, a network node can select a bearer based on respective QVs and RPVs of a set of allocated bearers. The network node can deallocate the selected bearer.

A technique is disclosed to minimize service interruption at a wireless user equipment device during a handover by maintaining dual active connections during the handover. Upon initiating the handover, an initial/first connection with a first access node is maintained while establishing a second connection with a second access node. The user equipment device can receive data over the first connection and second connection during the handover. The first connection may be terminated (by the user equipment device or by timing out due to inactivity) after the handover is completed. Other aspects, embodiments, and features are also claimed and described.

A measurement method for wireless communication networks, a base station and a terminal are provided. The method includes transmitting measurement configuration information to a terminal, wherein the measurement configuration information includes measurement object configuration information carrying a differentiation indication usable to differentiate a measurement object type; receiving a measurement result transmitted by the terminal after the terminal measures a determined measurement object which is determined according to the differentiation indication by the terminal, the measurement object type includes a Licensed-Assisted Access (LAA) cell configured with LAA frequency bins, a Long Term Evolution (LTE) cell configured with LTE frequency bins, or a MulteFire cell configured with MulteFire frequency bins; and the differentiation indication is an Absolute Radio Frequency Channel Number.

A data processing method when the handover or change appears between systems includes: a Mobility Management network element sends a data forwarding tunnel identifier of a target side processing network element to a user plane anchor network element, obtains a data forwarding tunnel identifier of the user plane anchor network element, and sends the data forwarding tunnel identifier of the user plane anchor network element to a source data forwarding network element.

Methods and devices for operating a wireless communication device that can communicate with at least two different wireless networks using a single radio frequency modem are described. The communication device attaches to a first wireless network through the radio frequency (RF) modem, and then detaches from the first wireless network at a predetermined time before a start time of a selected event on a second wireless network. The device attaches to the second wireless network using the same RF modem before the start time of the selected event and collects at least a portion of event data associated with the selected event. After collecting at least a portion of event data, the device detaches from the second wireless network and re-attaches to the first wireless network.

A system includes a wireless interface of a cellular tower and a processor of the tower. The processor is programmed to receive a message, including vehicle speed, from a vehicle connected to the tower over first and second network protocols, and responsive to determining that the vehicle speed exceeds a predefined threshold for the first network protocol, renegotiate connection of the vehicle to the tower to use a second network protocol but not the first network protocol.