Abstract: According to the embodiments of the present disclosure, a core network control plane device sends quality of service (QoS) information to a radio access network device, wherein the QoS information includes an indication information that indicates that a parameter of uplink QoS of the traffic is obtained based on a parameter of downlink QoS of the traffic, the radio access network device establishes a correspondence between a flow and a radio bearer based on the QoS information for a terminal; and the radio access network device receives data of the traffic that is sent from the terminal by using the radio bearer.

Abstract: This application provides a data transmission method. In the method, a first access network device and a second access network device establish a data radio bearer (DRB)-based tunnel and a session-based tunnel. The second access network device sends a Packet Data Convergence Protocol (PDCP) layer data packet to the first access network device via the DRB-based tunnel; and the second access network device sends a Service Data Adaptation Protocol (SDAP) layer data packet to the first access network device via the session-based tunnel.

Abstract: This application provides example communication methods and example communications apparatuses, to implement bearer mapping for user data transmission. One example method is applied to a wireless backhaul system having a first network and a second network of different RATs. The example method includes obtaining, by a first management network element in the wireless backhaul system, information about a first radio bearer of a terminal in the first network, where the information about the first radio bearer is used to indicate the first radio bearer. The first management network element can then determine a mapping relationship between the first radio bearer and a second radio bearer based on the information about the first radio bearer, where the second radio bearer is a radio bearer of the first device in the second network.

Abstract: A data processing method and apparatus are disclosed, and the method includes: determining a radio bearer, RB, to which a first flow is mapped changing from a first RB to a second RB; and sending end indication information. Data packet disorder can be avoided by said method and apparatus.

Abstract: A method includes the following. A first communications device obtains an ith data packet, divides the ith data packet into N data blocks, performs fountain-code encoding on the N data blocks to generate K fountain-code codewords, generates K protocol data units (PDUs) based on the K fountain-code codewords, and sends the K PDUs to a second communications device; and after the first communications device receives first acknowledgement information sent by the second communications device, the first communications device stops, based on the first acknowledgement information, sending a to-be-sent PDU in the K PDUs to the second communications device.

Abstract: This application provides a data transmission method. In the method, a first access network device and a second access network device establish a data radio bearer (DRB)-based tunnel and a session-based tunnel. The second access network device sends a Packet Data Convergence Protocol (PDCP) layer data packet to the first access network device via the DRB-based tunnel; and the second access network device sends a Service Data Adaptation Protocol (SDAP) layer data packet to the first access network device via the session-based tunnel.

Abstract: A method includes: obtaining, by a terminal, to-be-transmitted uplink service data of a preset granularity; obtaining, by the terminal, a QoS requirement parameter corresponding to the to-be-transmitted uplink service data of the preset granularity; and transmitting, by the terminal, the to-be-transmitted uplink service data of the preset granularity based on the QoS requirement parameter corresponding to the to-be-transmitted uplink service data of the preset granularity. Different data processing is implemented for to-be-transmitted uplink service data of preset granularities corresponding to different QoS requirement parameters, so that QoS requirements of uplink service data of different preset granularities are satisfied.

Abstract: Embodiments of this application provide a base station to which a communication processing method using a relay is applied. A control plane protocol layer includes an RRC layer and a PDCP layer that are respectively peering to those of a terminal; and the control plane protocol layer further includes an adaptation layer, an RLC layer, a MAC layer, and a PHY layer that are respectively peering to those of the relay. Via the base station including the control plane protocol layer, information about the RRC layer and the PDCP layer of the terminal does not need to be parsed in the relay, thereby reducing complexity of implementing the relay.

Abstract: This application provides a data transmission method. In the method, a first access network device and a second access network device establish a data radio bearer (DRB)-based tunnel and a session-based tunnel. The second access network device sends a Packet Data Convergence Protocol (PDCP) layer data packet to the first access network device via the DRB-based tunnel; and the second access network device sends a Service Data Adaptation Protocol (SDAP) layer data packet to the first access network device via the session-based tunnel.

Abstract: This application provides a communication method. In one example implementation, a method includes: receiving, by a radio access network device, an uplink data packet from a terminal device; obtaining, by the radio access network device, identity information of the uplink data packet; and adding, by the radio access network device, the uplink data packet to a transport network subnet based on a correspondence between the identity information of the uplink data packet and the transport network subnet.

Abstract: This application provides a reflective QoS flow characteristic-based communications method and apparatus. In the method, an access-network network element sends first information to a core-network network element, where the first information is used to indicate whether a data packet has a reflective QoS flow characteristic; and the access-network network element determines, based on the first information, whether there is a need to send a QoS flow identifier to a terminal. In this way, signaling overheads are reduced.

Abstract: This application provides a transmission method and a data transmission apparatus. The method includes: sending, by a source access network device, data packets of a QoS flow and a first end marker packet to a first core network user plane device over a first data tunnel, wherein the first end marker packet indicates an end of sending data packets of the QoS flow to the first core network user plane device, and the first data tunnel is corresponding to a first PDU session; sending, by the first core network user plane device, the data packets received from the source access network device and a second end marker packet to a second core network user plane device over a second data tunnel; and sending, by the second core network user plane device, the data packets received from the first core network user plane device to a target access network device.

Abstract: A communication method includes: receiving, by a terminal device, sub-network information of a RAN sent by a network side device, where the sub-network information is used to indicate at least one RAN sub-network included in the RAN; accessing, by the terminal device, a target RAN sub-network among the at least one RAN sub-network based on a service requirement of the terminal device; and communicating, by the terminal device, with the network side device by using the target RAN sub-network.

Abstract: Embodiments of the present application relate to the field of data transmission, and provide a data transmission method, a communications device, a terminal, and a base station. In at least one embodiment, different configuration parameters are configured for data packets having different importance, so that an important data packet is ensured at a high priority. In at least one embodiment, a communications device is configured to determine an attribute of a data packet to be transmitted, where the attribute of the data packet is used to indicate importance of the data packet. The communications device is configured to transmit the data packet by using a configuration parameter corresponding to the attribute of the data packet.

Abstract: Embodiments of this application provide a QoS flow processing method and device, and a communications system. A first access network device sends a message used for a service transfer request to a second access network device, and the message used for the service transfer request includes configuration information of a QoS flow in the first access network device, so that the second access network device can configure a mapping relationship from the QoS flow to a DRB of the second access network device for UE based on the configuration information, and accept the QoS flow of the UE. Therefore, in a service transfer process, a reliable QoS service can be provided for a user, and continuity of a user service can be ensured.

Abstract: A method for a handover of a mobile station performed by a source base station and a target base station. The target base station receives a handover request message, from the source base station, in which includes QoS information of the mobile device, radio bearer identifier information of the source base station, and a first mapping relationship between a flow and a radio bearer of the source base station, the target base station acknowledges with a handover acknowledgement message. Therefore resource preparation at the target base station during a handover procedure is improved.

Abstract: Embodiments of the present application provide an inter-system information exchange method. In this method, service continuity of user equipment during service transferring is ensured by exchanging information about one service bearer that is corresponding to one service bearer group in a wireless communications system of a communications technology and that is in a wireless communications system of another communications technology, or exchanging information about one service bearer group that is corresponding to one service bearer in a wireless communications system of a communications technology and that is in a wireless communications system of another communications technology.

Abstract: Embodiments of this application disclose a data transmission method, where the method includes: receiving, by user equipment, first information from a radio access device, where the first information indicates different transmission classes corresponding to a plurality of logical channels; determining, by the user equipment based on the first information, a transmission format of uplink data on at least one logical channel corresponding to at least one transmission class in the different transmission classes, and determining a transmission resource in the transmission format; and sending, by the user equipment, the uplink data by using the transmission format and the transmission resource in the transmission format. In this application, different transmission resources are allocated to uplink data on logical channels LCHs of different transmission classes, so that different requirements of different uplink data can be met.

Abstract: Example information transmission methods are described, One example method includes that a first base station receives resource status information from a second base station. The resource status information includes a service classification identifier and a resource status corresponding to the service classification identifier. The service classification identifier is a service type identifier or slice identification information.

Abstract: A communications method and apparatus are disclosed. The method includes: generating, by a terminal, first capability indication information, where the first capability indication information indicates that the terminal has a capability of processing out-of-order downlink data packets, or the first capability indication information indicates that the terminal has a capability of determining, based on a priority of a received downlink data packet, a priority of an uplink data packet corresponding to the downlink data packet, or the first capability indication information indicates that the terminal has a capability of processing out-of-order downlink data packets and a capability of determining, based on a priority of a received downlink data packet, a priority of an uplink data packet corresponding to the downlink data packet; and sending, by a first network device, the first capability indication information to the terminal.