Abstract: This disclosure provides communications methods and apparatuses. One method comprises: receiving, by a first entity of an adaptation layer in a network node, a data packet sent by an entity of a lower protocol layer of the adaptation layer, wherein the data packet comprising an adaptation layer header and an adaptation layer payload; and processing the data packet in response to determining whether the network node is a destination node that the data packet is routed to at the adaptation layer.

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: 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: This application discloses communications methods, systems, and apparatuses. One system comprises: a relay node of a radio access network and a parent node of the relay node; wherein the relay node is configured to: generate a message that comprises an identifier of a radio access network device and downlink status information corresponding to the identifier of the radio access network device, wherein the radio access network device is communicably coupled to the relay node and is directly accessed by a terminal device; and send the message to the parent node.

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: A first terminal obtains a first transmission resource that is sent by an access network device and that is used by the first terminal to send data on a sidelink, where the sidelink is a wireless communication link between the first terminal and a second terminal, and the first transmission resource is a resource of an unlicensed spectrum. The first terminal performs a channel access procedure on the unlicensed spectrum. The first terminal sends first information to the access network device when the first terminal determines that a failure occurs in the channel access procedure performed on the unlicensed spectrum, where the first information is used to request to allocate a second transmission resource to the sidelink of the unlicensed spectrum.

Abstract: The embodiments of this application provide a data transmission method, including: receiving, by a first radio access network device, traffic model information of a first terminal device that is sent by the first terminal device; sending, by the first radio access network device, the traffic model information of the first terminal device to a second radio access network device; receiving, by the first radio access network device, first resource configuration information sent by the second radio access network device; and sending, by the first radio access network device, a configuration message to the first terminal device.

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: This application provides an example sidelink transmission resource configuration method. Each piece of sidelink data corresponds to one transmission requirement. After obtaining a first data, a terminal device determines a transmission feature of the first resource, and determines, depending on whether reliability of the first resource meets a reliability requirement of the first data, whether to send the first data by using the first resource.

Abstract: This application provides wireless communications configuration methods and apparatuses. One method includes: receiving a routing configuration of a transmission path for a layer of the network device, wherein the routing configuration comprises an identifier of a first wireless backhaul node, the network device is a distributed unit (DU) of the donor node or a second wireless backhaul node connected to the DU, the CU and at least one wireless backhaul node is on the transmission path, and wherein the layer of the network device is capable of mapping, on a backhaul link based on identification information related to quality of service (QoS) requirement comprised in a data packet, the data packet to a radio link control (RLC) channel on a backhaul link for sending the data packet to a next-hop node of the network device on the transmission path; and performing the routing configuration on the layer.

Abstract: A data transmission method, comprising: a terminal device at a transmit end sends information about a transmission reliability requirement of to-be-transmitted data to a radio access network device through a wireless communications interface; and the terminal device at the transmit end obtains a transmission resource that is configured by the radio access network device and that is required for sending the to-be-transmitted data on the wireless direct communications interface, and sends the data to the terminal device at the receive end by using the transmission resource.

Abstract: A feedback method, an apparatus, and a system, which relate to the field of communications technologies. The method includes: a terminal device receiving configuration information sent by a network device, where the configuration information is used to indicate K time sequence relationships, the K time sequence relationships are respectively used for HARQ feedback on K downlink frequency domain resources, and K is a positive integer greater than or equal to 2; and the terminal device sending HARQ feedback information to the network device, where a quantity of downlink control channel monitoring occasions corresponding to the HARQ feedback information is determined based on the K time sequence relationships. According to the foregoing solution, the network device and the terminal device have a unified understanding on the HARQ feedback information. In this way, system robustness is improved.

Abstract: Example relay transmission methods and apparatus are described. One example method includes receiving first information by a first relay node, where the first information includes information about a second resource of a second relay node. The first relay node sends second information to a terminal, where the second information includes the information about the second resource. The second information further includes information about a first resource of the first relay node.

Abstract: A time domain resource indication method includes sending, by a first node, first time domain resource configuration information to at least one second node. The first time domain resource configuration information is used by the at least one second node to determine second time domain resource configuration information sent by the at least one second node to at least one third node. The first time domain resource configuration information indicates first time domain resources of a link between the first node and the at least one second node. The second time domain resource configuration information indicates second time domain resources of a link between the at least one second node and the at least one third node.