Abstract: Embodiments of the present disclosure provide an information configuration method and apparatus, and a communication device. The method includes: transmitting, by a Master Node (MN), a first request message to a Secondary Node (SN), wherein the first request message is used to request for configuring a conditional Primary Secondary Cell (PSCell) change; receiving, by the MN, a first response message transmitted by the SN, wherein the first response message is used for indicating that the SN accepts the first request message; and transmitting, by the MN to a terminal device, at least one of a PSCell change condition configuration, a target PSCell configuration, and a radio resource configuration on an MN side.

Abstract: Various embodiments disclosed herein provide for a caller identification (ID) method and system that can provide caller ID information to display on devices other than the wireless equipment device that is receiving the phone call. This can include televisions and other streaming devices associated with the user receiving the phone call. The mobile wireless network associated with the user's wireless user equipment can determine whether the user has an additional device on which caller ID is to be displayed, and then identify a media server associated with the additional device. Once identified, the mobile wireless network can provide the media server with the caller ID information so that it can be displayed on the television or other streaming device.

Abstract: A method of a base station in a wireless communication system is provided. The method includes: configuring a conditional handover (CHO) condition for a User Equipment (UE); and transmitting a message including the configured CHO condition to the UE, wherein the CHO condition comprises a measurement object and a report configuration field.

Abstract: Apparatuses, methods, and systems are disclosed for transmissions based on a type of collision. One method (400) includes determining (402) that a first transmission resource corresponding to a first user equipment preempts a second transmission resource corresponding to a second user equipment as a result of a collision between the first transmission re-source and the second transmission resource in a shared resource pool. The method (400) includes transmitting (404), from the second user equipment, a request for resource reselection and activation in response to a type of collision being a periodic collision or a series collision; or transmitting, from the second user equipment, the request for resource reselection in response to the type of collision being a one-time collision.

Abstract: The present disclosure relates to handling a master cell group (MCG) failure in wireless communications. According to an embodiment of the present disclosure, a method performed by a wireless device in a wireless communication system comprises: receiving, from a source primary cell (PCell), a conditional mobility command including a mobility condition for a target PCell; starting a timer for a master cell group (MCG) failure recovery and transmitting MCG failure information related to the MCG failure recovery to a primary secondary cell (PSCell), based on detecting a radio link failure (RLF) on the source PCell; and based on that the mobility condition for the target PCell is satisfied while the timer is running: transmitting, to the PSCell, a new PCell indication informing a mobility from the source PCell to the target PCell; and performing a random access to the target PCell for the mobility.

Abstract: Apparatus, methods, and computer program products for L1 or L2 mobility are provided. An example method may include receiving a carrier aggregation (CA) configuration associated with a L1 or L2 mobility configuration from a network node, the L1 or L2 mobility configuration including primary cell (PCell) configurations for multiple cells. The example method may further include receiving at least one activation or deactivation of one of the PCell configurations from the network node.

Abstract: Inter-alia, a method is disclosed comprising: obtaining measurement configuration information indicative of a measurement configuration for a measurement on at least one target secondary cell of a mobile communication network, executing a handover to a target cell, and, before and/or during executing the handover, starting a measurement on at least one target secondary cell based, at least in part, on the measurement configuration information. Further, a method is disclosed comprising: receiving, from a target node, target secondary cell information indicative of at least one target secondary cell, upon reception of the target secondary cell information, transmitting a measurement configuration information indicative of a measurement configuration for a measurement on at least one target secondary cell based, at least in part, on the target secondary cell information. It is further disclosed an according apparatus, a computer program and a system.

Abstract: Embodiments include methods for a first radio network node (RNN) in a wireless network to configure quality of experience (QoE) measurements by user equipment (UEs). Such methods include receiving, from a measurement function in the wireless network, a QoE measurement configuration (QMC associated with one or more service types; and configuring one or more UEs with the QMC. Such methods also include sending to a second RNN in the wireless network, a first request for handover of a particular one of the UEs from a first cell served by the first RNN via a first radio access technology (RAT) to a second cell served by the second RNN via a second RAT. The first request includes the QMC. Other embodiments include complementary methods performed by a second RNN or by a UE, as well as first RNNs, second RNNs, and UEs configured to perform such methods.

Abstract: 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.

Abstract: A communication method includes a first IAB node receives a first message from a CU of an IAB donor, where the first message indicates the first IAB node to be handed over from a first parent node to a second parent node, and the first message includes a first IP address of the first IAB node. The first IAB node determines first transport network layer association information between the first IAB node and the CU of the IAB donor based on the first IP address. The first IAB node updates control plane context information of an F1 interface by using the first transport network layer association information, where the F1 interface is an interface between the first IAB node and CU of the IAB donor. An IAB node communicates with a CU of an IAB donor by using a first IP address as soon as possible after handover is completed.

Abstract: A method includes a first access network device that sends first indication information to a second access network device. The first indication information indicates information about a current active BWP and/or transmission rate information of a terminal device on the first access network device. The second access network device determines information about a first-time active BWP and/or BWP configuration information of the terminal device on the second access network device based on the first indication information. The method may be used to enable the second access network device to determine the appropriate information about the first-time active BWP and/or the appropriate BWP configuration information of the terminal device on the second access network device. In this way, service interruption caused by switching of an active BWP is reduced, and/or service interruption caused by changing of a BWP configuration is reduced.

Abstract: Methods, systems, and devices for wireless communication are described. Techniques to use capability information for user equipment in wide band systems such as millimeter wave systems. The capability information can include information indicative of support for limited non-contiguous intra-band carrier aggregation. The capability information can include information indicative of support for sharing time and frequency tracking information between cells.

Abstract: A method of routing communication among nodes and systems of an interplanetary network on an ad-hoc basis is described herein. For example, the communication routing described herein may not be pre-determined or static, but rather determined dynamically on a periodic basis, as transmission conditions change, as nodes are added or removed from the interplanetary network, periodically, and/or the like. The interplanetary network may include one or more nodes that have static and/or dynamic states. A node can include any extraterrestrial object or communication relay. The interplanetary network may also include one or more ground stations, which can include communication equipment (e.g., antennas, radar, transmission towers, etc.) located on Earth. To enable the ad-hoc communication routing, a ground station system and/or another processing device can continuously or periodically obtain orbital parameters from one or more nodes in the interplanetary network and generate updated contact plans.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first integrated access and backhaul (IAB) donor central unit (CU) may transmit, to a second IAB donor CU, a resource configuration of a first cell served by an IAB node to initiate a migration of the IAB node from a first parent node to a second parent node serving a second cell associated with the second IAB donor CU. The first IAB donor CU may receive, from the second IAB donor CU, an indication that communications performed by the IAB node associated with the first cell will not conflict with communications with the second parent node serving the second cell. The first IAB donor CU may migrate the IAB node to the second parent node based at least in part on the indication. Numerous other aspects are described.

Abstract: A master node (MN) that determines a manner of a protocol data unit (PDU) session to be served, wherein the manner of the PDU session includes a split PDU session between the MN and a secondary node (SN) or a whole PDU session served by the MN, generates a request message to be transmitted to the SN to setup PDU session resources on the SN based on the manner of the PDU session is to be served and indicates, to the SN, the manner of the PDU session to be served. A SN that receives, from a MN, a request message to setup PDU session resources, determines a manner of the PDU session to be served, and sets up the PDU session resources on the SN, based on at least the manner of the PDU session to be served.

Abstract: The present disclosure relates to a pre-5th-generation (5G) or 5G communication system to be provided for supporting higher data rates beyond 4th-generation (4G) communication system such as long term evolution (LTE). The present disclosure provides a method performed by a user equipment in a wireless communication system, and the user equipment. The method comprises: transmitting information indicating a high speed capability of the UE to a network-side entity; and receiving configuration information corresponding to the high speed capability of the UE from the network-side entity.

Abstract: Methods, nodes, computer programs and communication networks are disclosed. The disclosure provides a method performed by a network node for controlling traffic in a communications network, the communications network comprising a wireless access node adapted to serve a plurality of wireless devices. The method comprises obtaining network operation data for at least one of the plurality of wireless devices, the network operation data comprising location of the respective wireless device and performance data correlated with the location, the network operation data being indicative of a plurality of attributes corresponding to the operation of the respective wireless device in the communications network. The method also comprises grouping the at least one wireless device of the plurality of wireless devices by partitioning the network operation data into one or more service clusters wherein each service cluster defines a geographical area based on the obtained location.

Abstract: A method for performing communication in a wireless communication system in includes establishing, by a network entity, a context of a user equipment (UE) in a network, receiving a message for registration request from the UE in a registered state, identifying that the UE is genuine by executing an authentication procedure with the UE, and in case that the UE is genuine, performing a deletion of the established context of the UE and a process of the registration request.

Abstract: Provided are an electronic device and a method for wireless communication, and a computer-readable storage medium. The electronic device comprises: a processing circuit, configured to: send, by means of radio resource control signaling, configuration information of a universal transmission configuration indication state to a user equipment, wherein the universal transmission configuration indication state comprises a transmission configuration indication state of a downlink beam of a serving cell of the user equipment and a transmission configuration indication state of a downlink beam of a non-serving cell other than the serving cell; and determine activation information of a downlink beam of a target cell, wherein the user equipment is to be switched to the target cell.

Abstract: A communication terminal apparatus includes processing circuitry configured to collect communication of an application and control the communication of the application based on a first control condition, analyze the communication collected to determine whether the application is a communication control target, and generate the first control condition based on a normal communication range of the application that is the communication control target, and transmit at least a part of first shared information including identification information about the application and the first control condition to a second communication terminal apparatus that is different from the communication terminal apparatus.

Abstract: A communication control apparatus that controls a terrestrial network including a terrestrial base station installed on the ground and capable of communicating with a communication device by means of time-continuous TN data, and, a non-terrestrial network including a flying base station and capable of communicating with a communication device by means of time-continuous NTN data, includes: a signal strength reduction unit that reduces signal strength of at least part of at least one of the TN data and the NTN data at least in an overlapping area of the terrestrial communication cell and the flying communication cell; a communication delay acquisition unit that acquires communication delay between the flying base station and the flying communication cell; and a synchronization unit that synchronizes the TN data and the NTN data based on the communication delay acquired by the communication delay acquisition unit.

Abstract: Embodiments of the present disclosure relate to communication. According to embodiments of the present disclosure, if an expiration of a data inactivity timer occurs during a handover, a terminal device maintains in a RRC connected state. The terminal device releases a link with the source network device. Further, the terminal device is able to ignore the expiration of the data inactivity timer during the handover. In this way, the impact of data inactivity of the source network device is properly handled.

Abstract: A method for seamless WiFi roaming of a multi-radio station when transitioning from an initial access point to a target access point, wherein the method comprises activating a second communication link between the multi-radio station and the target access point while a first communication link between the multi-radio station and the initial access point is still active, and after said activating, deactivating the first communication link between the multi-radio station and the initial access point.

Abstract: A method and device for selecting a beam used in communication in an environment in which massive-MIMO beamforming is performed, to include a base station including: a communication unit configured to form multiple beams and perform communication with a terminal apparatus; and a control unit configured to transmit, to the terminal apparatus, first identification information of a group that is used in communication with the terminal apparatus among the first identification information allocated to groups each of which includes multiple beams to be formed.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit an indication of a classification of a link established between the UE and a network node. The classification may indicate whether the link is associated with a reciprocity. The reciprocity may include a beam correspondence and channel reciprocity. The classification of the link may be a binary classification. The classification of the link may be based at least in part on a metric associated with the link. The link may be associated with the reciprocity depending on one or more link characteristics associated with the link. Numerous other aspects are described.

Abstract: Provided is an information processing apparatus acquiring a recipient user who is a delivery destination, determining whether or not to use already issued authentication information for receiving a package based on the recipient user and authentication information stored in a storage unit, the storage unit storing the already issued authentication information in association with a user who is an issuing destination, issuing new authentication information as the authentication information used for receiving the package and storing the issued authentication information in association with the recipient user in the storage unit when it is determined that the already issued authentication information is not used for receiving the package, and acquiring the authentication information stored in the storage unit as the authentication information used for receiving the package when it is determined that the already issued authentication information is used for receiving the package.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a base station may provide, to a distributed unit (DU) of the base station, an indication of one or more candidate physical entity (PHY) profiles. The base station may receive, from the DU, an indication of a selected PHY profile, of the one or more candidate PHY profiles, to use for communication with a device, such as a user equipment. Numerous other aspects are described.

Abstract: A method of performing a handover of a mobile network device from a first gateway device to a second gateway device includes determining the second gateway device from a plurality of gateway devices based on a movement information associated the mobile network device, wherein the movement information is indicative of a potential movement of the autonomous vehicle. The method further includes reserving one or more radio resources at the second gateway device in relation to the mobile network device and releasing one or more radio resources at the first gateway device in relation to the mobile network device. The movement information associated with the mobile network device is estimated based on at least one of process data associated with the mobile network device and the network information associated with the mobile network device.

Abstract: The present disclosure is directed to systems and techniques for providing signaling optimization for Modify Access Bearer Request (MABR) messaging in a network. In one example, the systems and techniques can include negotiating, using a Mobility Management Engine (MME), a MABR support for the MME to include subscriber information in one or more MABR messages transmitted by the MME. The MME can determine an updated subscriber information, wherein the updated subscriber information is determined based on a User Equipment (UE) location change. Based at least in part on the negotiated MABR support, and in response to the MME determining the updated subscriber information, the MME can transmit a single MABR to a Serving Gateway (SGW), wherein the single MABR message includes the updated subscriber information.

Abstract: Methods, systems, and devices for wireless communications are described. A first device may release an uplink resource associated with a semi-persistent uplink transmission during a portion of a transmission time interval based at least in part on a condition. For example, the first device may determine that a buffer associated with the first device satisfies a buffer threshold (e.g., a threshold amount of temporarily stored uplink data) during a first temporal period. The buffer may temporarily store uplink data associated with the semi-persistent uplink transmission. The first device may, as a result, transmit, to a second device, a feedback message including an indication that the first device skips the semi-persistent uplink transmission based on releasing the uplink resource.

Abstract: An electronic apparatus includes a processing circuit configured to: determine a topological position of an IAB node in an IAB network at a subsequent moment, the topological position including a parent node and a donor node of the IAB node; sending a handover request to a donor node of the IAB node of the subsequent moment, so as to request that a handover of the IAB node to the parent node and the donor node of the subsequent moment is performed at the subsequent moment; and sending a handover notification to a donor node of the IAB node of a current moment, the notification comprising the topological position of the IAB node of the subsequent moment, such that the IAB node is connected, on a control plane, to both the donor node of the current moment and the donor node of the subsequent moment.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a network node, information identifying a set of conditional configurations for a set of possible target cells associated with a first communication procedure, wherein the set of conditional configurations are associated with a master cell group or a secondary cell group. The UE may communicate with the network node or another network node in accordance with a conditional configuration, of the set of conditional configurations, associated with a second communication procedure. Numerous other aspects are described.

Abstract: A wireless device, for operation within a wireless network, the wireless device comprising: a RF transmitter, a RF receiver, and processing circuitry, where the RF transmitter sends a radar-detected message or a channel-switch announcement message to other wireless devices in the wireless networks. The other wireless devices receive the radar-detected message and abandon radar-detected channels designated in the radar-detected message. The other wireless devices also receive the channel-switch announcement message and switch to radar-free channels designated in the channel-switching message.

Abstract: Aspects of the disclosure relate to control of discovery signal transmissions for D2D communication. A first UE may transmit a discovery signal initiation message to at least a second UE to control transmission of a discovery signal from the second UE to a third UE. The second UE may identify a discovery signal monitoring duration of the second UE during which the second UE monitors for transmitted discovery signals transmitted from other UEs to the third UE. At expiration of the discovery signal monitoring duration, the second UE may transmit a discovery signal to the third UE when the number of transmitted discovery signals transmitted from the other UEs during the discovery signal monitoring duration is less than a discovery signal transmission number threshold.

Abstract: When a user equipment (UE) encounters a radio link failure condition, the UE may transmit a radio link failure report to a network. The report may include information defining the radio link monitoring (RLM) resources of a current RLM configuration. The information may take the form of a resource bitmap or a list of resource identifiers/indices. The network may use the information (and radio resource management measurements) to determine whether the radio link failure occurred due to misconfiguration of RLM resources for the UE. In cases where the network does not provide RLM configuration, the UE may omit the bitmap (or list), or populate the bitmap with all zeros, or populate the bitmap (or list) according to a currently active Transmission Configuration Indication (TCI) state, which is indicated by downlink control information (DCI).

Abstract: This disclosure provides systems, methods and apparatuses, including computer programs encoded on computer storage media, for uplink switching for enhanced mobility. In some aspects, this disclosure provides techniques for potentially reducing or eliminating service interruptions experienced during a handover from a source cell to a target cell. Additionally, this disclosure provides techniques for potentially simplifying or improving uplink communications while a UE is connected to both the source cell and the target cell during the handover. This disclosure further provides techniques for potentially reducing UE power consumption or improving uplink resource utilization during a handover from a source cell to a target cell while a UE is connected to both the source cell and the target cell during the handover.

Abstract: Disclosed are a service switching method, a terminal and a network device. The method comprises: when a terminal receives data of a first service, if the terminal determines that a present condition is satisfied, then the terminal switches to receiving data of a second service. The preset condition comprises: the condition of the terminal stopping the first service, and/or the condition of receiving the data of the second service.

Abstract: The present disclosure provides solutions to registration and discovery of NFs in the vertical 5G networks, at the operator network, as well as handling tasks such as authentication of connecting end terminals at the operator network level. In one aspect, a method includes receiving, at network controller of an operator network and from an end terminal, a request for access to a network function (NF) of a vertical network, the request including a type of the NF in the vertical network; authenticating, at the network controller, the end terminal; upon authenticating the end terminal, identifying, at the network controller, the NF requested by the end terminal based at least on the type of the NF included in the request; and facilitating, by the network controller, access to the NF in the vertical network by the end terminal.

Abstract: Examples described herein relate to techniques for session continuity when a User Equipment (UE) is moving to a destination core of a destination communication system in an interworking network architecture. Example techniques may include registering by a destination subscription manager in a Network Repository Function (NRF) a subscription profile and indicating support for a session continuity for the User Equipment (UE). Discovering the subscription profile by a source subscription manager by utilizing the NRF. Receiving the session information by the destination subscription manager from the source subscription manager based on the discovery of the subscription profile. Enabling continuity of the session by the destination subscription based on the received session information.

Abstract: An intent state management method, network element, and system are described. A first network element obtains a first network parameter value corresponding to an intent; and determines, based on the first network parameter value corresponding to the intent, that a condition for achieving the intent is not satisfied. In accordance with the determination, the first network element suspends execution of the intent, sends a first notification message to a second network element, where the first notification message notifies the intent to enter a sleep state; and sets the sleep state to an active state when the condition for achieving the intent is satisfied or the intent is modified. Network resources of the first network element can be saved. When the condition for achieving the intent is satisfied or the intent is modified, the intent enters the active state, so that a state of the intent can be adjusted in time.

Abstract: A method for performing seamless relocation of a mobile terminal in a wireless network includes selecting a first serving gateway (SGW) among a plurality of SGWs and a first packet data network gateway (PGW) among a plurality of PGWs, wherein the first SGW connects to the first PGW to setup the first S5 session, establishing a first communication channel between the terminal and the first PGW and assigning an internet protocol (IP) address to the terminal, selecting a second SGW among the plurality of SGWs when the terminal is about to move out of an area being served by the first SGW, connecting the second SGW to the second PGW to setup a new S5 session when a second PGW among the plurality of PGWs is closer to the second SGW than the first PGW or connecting the second SGW to the first PGW to modify the first S5 session when no PGW is closer to the second SGW than the first PGW, establishing a second communication channel between the terminal and the second SGW using the IP address allocated to the terminal,

Abstract: A cloud server receives information to be authenticated sent by a wireless access point device. The information to be authenticated contains verification information generated by a terminal to be authenticated. The terminal is a wireless terminal provided by the wireless access point device for accessing a wireless local area network. The cloud server determines that it locally stores a verification key that matches the terminal. The cloud server obtains the locally stored verification key and performs verification on the verification information according to the verification key. When the verification on the verification information succeeds, the cloud server the verification key to the wireless access point device so that the wireless access point device associatively stores the verification key with a terminal identifier of the terminal and completes authentication on the terminal according to the verification key.

Abstract: In a communication method, a first access network device sends first information to a second access network device, where the first information is used to indicate that the first access network device has notified a core network device that a quality of service requirement of at least one quality of service flow cannot be met; the second access network device may send second information to the core network device, where the second information is used to notify the core network device that a quality of service requirement of a first quality of service flow in the at least one quality of service flow can be met, and the first quality of service flow is a quality of service flow that has been handed over from the first access network device to the second access network device.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine whether an uplink communication that is scheduled to be transmitted by a plurality of physical uplink repetitions in multiple slots on a plurality of beams is subject to a maximum permissible exposure (MPE) condition. The UE may determine a transmission adjustment for the plurality of physical uplink repetitions on the plurality of beams, based at least in part on a determination that the uplink communication is subject to the MPE condition, and transmit the uplink communication based at least in part on the transmission adjustment.

Abstract: A communication device determines a communication quality with a base station, requests a neighboring base station for a transition judgment information to transmit information to become a judgment criterion of the communication quality to be included in a Beacon signal at a stage before the communication quality degrades to an extent that the base station is immediately switched, and selects a base station with which a communication connection should be established on the basis of the transition judgment information included in the Beacon signal transmitted in response to the transition judgment request. The communication device is applicable to a communication system in the wireless LAN.

Abstract: The present disclosure relates to handling a timer related to a radio link failure (RLF) in wireless communications. According to an embodiment of the present disclosure, a method performed by a wireless device in a wireless communication system comprises: receiving a conditional mobility command comprising a mobility execution condition for a target cell; detecting that an entering condition of the mobility execution condition is satisfied while a timer is running, wherein a radio link failure (RLF) is detected upon an expiry of the timer; stopping the timer based on detecting that the entering condition of the mobility execution condition is satisfied; and performing a mobility to the target cell based on that the entering condition is satisfied for at least a time to trigger (TTT) related to the mobility execution condition.

Abstract: The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). The embodiments of the present invention provide methods and devices for network access. The method includes receiving a first request message forwarded by a distributed unit in a base station and indication information of the distributed unit with respect to the first request message, the first request message requesting to connect a user equipment to a network; determining a processing to be performed on the first request message based on the indication Information; and transmitting an indication of the determined processing to the distributed unit.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine, during a packet data convergence protocol (PDCP) reordering timer period, whether one or more packet transfer criteria are satisfied. The UE may transfer, during the PDCP reordering timer period, one or more packets from a reordering window based at least in part on a determination that the one or more packet transfer criteria are satisfied. Numerous other aspects are provided.

Abstract: Systems, methods, and instrumentalities are disclosed for network slice selection and/or reselection. A WTRU may receive updated assistance information for network slice selection and/or reselection. The WTRU may apply local policies to determine when to use the updated assistance information to access a network slice. The WTRU may determine whether to contact an existing network slice function or a new network slice function 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.

Abstract: An integrated access and backhaul (IAB) node switching method, including: receiving, by a third IAB node, a node switching command from a source donor node, where the node switching command is used to indicate a parent node of the third IAB node to switch to a second node, the source donor node is a control node of the third IAB node, the first node is a source parent node of the third IAB node, the first node is a donor node or another IAB node, and the second node is a donor node or another IAB node; and switching, by the third IAB node, to the second node, and sending, by the third IAB node, first indication information to a child node of the third IAB node, where the first indication information indicates the child node to interrupt transmission with the third IAB node.