Embodiments of this application provide a communication method and apparatus. The method includes: A source secondary node SN receives an address of a core network device from a source master node MN. The source SN establishes, based on the address of the core network device, a channel for data forwarding between the source SN and the core network device, where the channel for data forwarding is used for transmission of data of a terminal device.

A method, performed by a terminal, in a wireless communication system is provided. The method includes receiving, from a source base station, a radio resource control (RRC) reconfiguration message for a handover, the RRC reconfiguration message configuring a first data radio bearer (DRB) as a dual active protocol stack (DAPS) bearer and a second DRB as a non-DAPS bearer, for the first DRB, in case that an uplink data switching is requested from an upper layer, indicating, by a packet data convergence protocol (PDCP) entity for the DRB, a PDCP data volume excluding a PDCP Control protocol data unit (PDU) associated with the source base station, to a medium access control (MAC) entity for a target base station, and for the second DRB, in case that an indication of PDCP re-establishment is set, performing a PDCP re-establishment for the second DRB.

Aspects of the present disclosure propose solutions to a problem of mobility interruption during handover between base stations by providing a UE with mechanisms to report the UE capability for simultaneous connectivity based handover, or so-called Dual Active Protocol Stack Handover (DAPS-HO). A UE reports the DAPS-HO capability of the UE to the network and then the base station initiates physical layer procedures to carry out DAPS-HO in accordance with the DAPS-HO capability reported by the UE. Aspects of the present disclosure also provide examples of signaling that may be used by the UE for reporting DAPS-HO capability to the network and the physical layer procedures that the UE may follow in accordance with the configuration that the network provides to the UE, which should be in accordance with the UE's capability.

Aspects of the present disclosure relate to wireless communications, and more particularly, to performing a handover on a per-data radio bearer (DRB) basis. In some examples, the disclosure is directed to indicating, to a source network entity, a make-before-break (MBB) handover capability of the UE, the MBB handover capability supporting MBB handovers for one or more DRBs identified by the source network entity. In some examples, the disclosure describes receiving, from the source network entity, configuration information for a handover from the source network entity to a target network entity, the configuration information identifying the one or more DRBs supported for the MBB handover.

The disclosure relates to: a communication technique for merging an IoT technology with a 5G communication system for supporting a higher data transmission rate than a 4G system; and a system therefor. The disclosure can be applied to intelligent services (for example, smart homes, smart buildings, smart cities, smart cars or connected cars, healthcare, digital education, retail businesses, security- and safety-related services, and the like) on the basis of a 5G communication technology and an IoT-related technology. The disclosure discloses a method and apparatus for handover of a wireless backhaul node.

Disclosed are a method for switching between access network devices, a terminal device, and a network device. The method includes the terminal device initiating a random access to a target access network device while maintaining a connection with a source access network device. The method also includes the terminal device releasing the connection with the source access network device, after successfully accessing to the target access network device and in response to channel quality of the source access network device meeting a preset condition.

For continuous data transmission during a handover procedure, Make-Before-Break handover may be introduced, which maintains source evolved NodeB (eNB) connection after reception of radio resource control (RRC) message for handover. In order to reduce ambiguity of Make-Before-Break handover, the present invention provides receiving a handover command from a network, after receiving the handover command from the network, keeping exchanging data with a source cell, stopping exchanging data with the source cell when a condition is met, and after stopping exchanging data with the source cell, starting exchanging data with a target cell.

AP's associated with a communication network and any wireless devices desiring contact, operated according to a protocol in which each wireless device selects AP's with which to communicate. A system coordinator causes the AP's to operate so as to guide each wireless device to an AP selected by the system coordinator. This has the effect that, notwithstanding that the protocol involves having the wireless device make the selection of AP, functionally, the AP's make the selection for it. In a 1st technique, multiple AP's share an identifier, with the system coordinator directing one particular AP to respond to the wireless device, thus appearing to wireless devices as a personal cell. In a 2nd technique, AP's each maintain identifiers substantially unique to each wireless device, with the system coordinator directing only one particular AP to maintain any particular wireless device's identifier, thus appearing to wireless devices as a personal AP.

A UE receives a handover command from a source eNB, and transmits a handover indication message to the source eNB while maintaining a connection to the source eNB. After transmitting the handover indication message, the UE disconnects the connection to the source eNB. Further, the UE accesses to a target eNB. A handover command includes information indicating timing advance if a handover without a random access procedure is configured.

A method and system for an enhanced uplink (EU) operation in a wireless communication system during soft handover. The system comprises a wireless transmit/receive unit (WTRU), at least two Node-Bs, and a radio network controller (RNC). One Node-B may be designated as a primary Node-B, and the primary Node-B may control EU operation during soft handover including uplink scheduling and hybrid automatic repeat request (H-ARQ). Soft buffer corruption is avoided during soft handover by controlling H-ARQ by the primary Node-B. Alternatively, an RNC may control EU operation during soft handover including H-ARQ. In this case, an RNC generates final acknowledge/non-acknowledge (ACK/NACK) decision based on the error check results of the Node-Bs.