Abstract: Embodiments of the present application relate to methods and apparatuses for a mobility robustness optimisation (MRO) mechanism. According to an embodiment of the present application, a UE includes a processor and a wireless transceiver coupled to the processor; and the processor is configured: to store information including distance information associated with a distance between the UE and a reference location, wherein the information is at least one of radio link failure (RLF) related information, handover failure related information, or handover success related information; and to transmit the information via the wireless transceiver to a network node.

Abstract: Example mapping methods and apparatus are described. One example method includes determining a message type of an uplink signaling message by an integrated access and backhaul node. The integrated access and backhaul node maps the uplink signaling message to a corresponding backhaul radio link control (BH RLC) based on an uplink mapping relationship from an integrated access and backhaul donor centralized unit and the message type. The uplink signaling message is sent to a parent node of the integrated access and backhaul node.

Abstract: The present disclosure discloses example downlink buffer status feedback methods and apparatuses. One example method includes determining first information by a first node, where the first information indicates a downlink buffer status of a first bearer between the first node and a parent node of the first node. The first information is sent by the first node to a second node, where the first node is a relay node in a wireless relay communications system, and the second node is a parent node of the first node.

Abstract: Embodiments of the present disclosure relate to wireless communication in an IAB network. According to some embodiments of the disclosure, a method performed by an IAB node may include: receiving flow control feedback; and performing bearer remapping based on the received flow control feedback.

Abstract: This application provides a method of determining an association between logical channel groups, including: The first backhaul node receives a first buffer status report from a first device, where the first buffer status report is used to determine uplink buffer statuses of one or more first logical channel groups of a MAC entity corresponding to the first backhaul node and the first device. The first backhaul node determines, based on the first logical channel group(s) and a first mapping relationship, one or more second logical channel groups associated with the first logical channel group(s), where a second device is a parent node of the first backhaul node, and the first mapping relationship includes a mapping relationship between the first logical channel group(s) and the second logical channel group(s) of a MAC entity corresponding to the first backhaul node and the second device.

Abstract: Embodiments of the present disclosure relate to wireless communication in an IAB network. According to some embodiments of the disclosure, a method performed by an IAB node may include: receiving, at a backhaul adaptation protocol (BAP) layer of the IAB node, a backhaul (BH) radio failure link (RLF) indication from a parent node of the IAB node, wherein the BH RLF indication indicates an RLF detection on a radio link between the parent node of the IAB node and a parent node of the parent node of the IAB node or the BH RLF recovery success on the same radio link.

Abstract: This application provides a data transmission method and an apparatus. The method includes that an integrated access and backhaul (IAB) donor distributed unit receives downlink data and service attribute information of downlink data that are sent by an IAB donor centralized unit. The IAB donor distributed unit maps the downlink data to a corresponding backhaul radio link control channel (BH RLC) channel based on the service attribute information of the downlink data or based on the service attribute information of the downlink data and access IAB node address information of the downlink data, and sends the downlink data to a next-hop IAB node.

Abstract: The present disclosure provides communications methods and apparatuses. One method includes: receiving, by a first communication node, first indication information from a second integrated access and backhaul (IAB) node, wherein the first indication information indicates that a radio link failure (RLF) occurs on a backhaul (BH) link on a first communication path between the first communication node and a second communication node, wherein the first communication node is a terminal device or a first IAB node, and wherein the second IAB node is on the first communication path, and reporting, by the first communication node, second indication information through a second communication path between the first communication node and the second communication node, wherein the second indication information indicates that the RLF occurs on the BH link on the first communication path.

Abstract: Embodiments of the present disclose a wireless communication in an IAB network. The method performed by an IAB node may include: transmitting, to a first IAB donor, a first resource configuration for a mobile terminal (MT) of the IAB node, wherein a distributed unit (DU) of the IAB node is connected to the first IAB donor and the MT of the IAB node is connected to or is for handing over to the second IAB donor: and receiving, from the first IAB donor, a second resource configuration for the DU of the IAB node, wherein the second resource configuration is determined based on the first resource configuration.

Abstract: The present disclosure relates to a methods and apparatuses for reporting event related information. One embodiment of the present disclosure provides a method performed by a user equipment (UE), which includes: detecting a first event associated with a source secondary cell group (SCG) or a target SCG; detecting a second event associated with a master cell group (MCG); and storing event related information associated with the first event and the second event for transmission to the network.

Abstract: Embodiments of the present disclosure relate to methods and apparatuses for relay replacement. According to some embodiments of the disclosure, a method may include: receiving assistant information associated with a first network node, which functions as a relay node between the BS and a user equipment (UE); and in response to initiating a replacement procedure to replace the first network node based on the received assistant information, deactivating the first network node and activating a second network node as the relay node.

Abstract: Embodiments of the present disclosure relate to wireless communication in an IAB network. According to some embodiments of the disclosure, a method may include: ciphering an uplink (UL) packet with a cipher configuration associated with a destination of the UL packet, wherein the UE is connected to a first integrated access and backhaul (IAB) donor and a second IAB donor via an IAB node, and the destination of the UL packet is either the first IAB donor or the second IAB donor; providing the ciphered UL packet with the destination of the UL packet; and transmitting the ciphered UL packet to the destination of the UL packet via the IAB node. By employing the solutions in the present disclosure, a UE can determine that the DL packet is from which IAB donor and thus can process the DL packet accordingly. Moreover, an IAB node can determine that the UL packet is to which IAB donor and can route the UL packet to the corresponding IAB donor.

Abstract: A first terminal device has first data to be transmitted on a sidelink and has second data to be transmitted on an uplink. The first terminal device performs medium access control MAC protocol data unit PDU assembly on the first data or does not perform MAC PDU assembly on the first data based on a result of comparison between a transmission priority of the first data and a transmission priority of the second data.

Abstract: Embodiments of the present disclosure relate to methods and apparatuses for coverage extension and wireless communication. According to some embodiments of the disclosure, a method may include: receiving from a base station (BS) a message comprising an indication that a drone-based relay or vehicle-based relay is supported by the BS, wherein the mobile terminal is allowed to serve as a relay node between the BS and a user equipment (UE); and in response to receiving the indication indicating that a drone-based relay or vehicle-based relay is supported by the BS, performing a random access procedure with the BS. In addition, the mobile terminal may report the assistant information, e.g., the remaining power information, to the BS.

Abstract: A wireless backhaul method, including: a wireless backhaul device generates a first F1AP message, maps the first F1AP message to a signaling-plane bearer of an LTE Uu interface, and sends the first F1AP message to a primary base station of the wireless backhaul device via the signaling-plane bearer of the LTE Uu interface. The primary base station obtains the first F1AP message via the signaling-plane bearer of the LTE Uu interface, encapsulates the first F1AP message into a first X2AP message, and sends the first X2AP message to a secondary base station of the wireless backhaul device. The secondary base station receives the first X2AP message and obtains the first F1AP message based on the first X2AP message.

Abstract: This application provides a communication method. In the method, a first node receives a first radio resource control (RRC) reconfiguration message from a first donor node through a second node. After the first node receives the first RRC reconfiguration message from the second node, the first node receives first indication information from the second node. When the first node determines, based on the first indication information, that the first RRC reconfiguration message becomes effective, the first node establishes an RRC connection to a second donor node based on the first RRC reconfiguration message. In the method, the first node and the second node are nodes in a group that performs group handover, the group handover is a cross-donor node group handover, the second node is a head node or the second node is connected to a head node, and the second node is a parent node of the first node.

Abstract: In a method, an IAB donor obtains configuration information of a backhaul radio link control channel BH RLC CH, where the configuration information of the BH RLC CH is configuration information of a BH RLC CH between a first integrated access and backhaul IAB node and a source parent node of the first IAB node. Then, the IAB donor sends the configuration information of the BH RLC CH to a target parent node of the first IAB node.

Abstract: A communication method and a related apparatus for data transmission in vehicle-to-everything (V2X) communication, the apparatus including at least one processor and a non-transitory computer-readable memory storing a program to be executed by the at least one processor, the program including instructions for obtaining a first parameter value of an uplink, obtaining a second parameter value of a sidelink, and transmitting, according to a comparison between the first parameter value and the second parameter value, at least one of an uplink media access control protocol data unit or a sidelink media access control protocol data unit, where the uplink is a wireless communications link from the apparatus to a network device, and where the sidelink is a wireless direct transmission link between the apparatus and another terminal device.

Abstract: A first node sends, after determining that all data packets from a migrating IAB node are received, first indication information to a source IAB donor CU. The first node is an upstream IAB node of a source parent node of the migrating IAB node or is a source IAB donor DU, the source IAB donor CU is an IAB donor CU connected to the migrating IAB node before migration, and the source IAB donor DU is an IAB donor DU connected to the migrating IAB node before the migration. The first node receives second indication information from the source IAB donor CU. The first node updates or releases, based on the second indication information, backhaul configuration information that corresponds to the migrating IAB node and that is on a backhaul link between the first node and a child node of the first node.

Abstract: An integrated access and backhaul (IAB) node configuration method includes receiving, by a target IAB donor, first information from a source IAB donor. The method also includes sending, by the target IAB donor, first configuration information to the source IAB donor. The first configuration information is for handing over an IAB node from the source IAB donor to the target IAB donor. The IAB node includes a mobile terminal (MT) function and a distributed unit (DU) function. The first configuration information is based on the first information. The first configuration information indicates a transmission direction of a time domain resource configured by the target IAB donor for the MT function. The first information indicates one or more different types of information.