The present disclosure relates to data transmission methods. One example method is applied to a first communications device or a chip in the first communications device. The method includes obtaining first data, and sending, to a second communications device, a first message including the first data and a type identifier, where the type identifier is used to indicate a type of the first data, and the type of the first data includes at least one of user plane data, a status report, a control plane message, and a radio resource control RRC message of a terminal.

This application provides a communication method, an access network device, and a terminal device. The communication method includes obtaining, by a first access network device, information about a correspondence between a session of a terminal device and a network slice; and sending, by the first access network device, the information to a second access network device.

This application provides a communication method, an access network device, and a terminal device. The communication method includes obtaining, by a first access network device, information about a correspondence between a session of a terminal device and a network slice; and sending, by the first access network device, the information to a second access network device.

An apparatus may receive, from a second device over a first communications link, a first bitmap indicating a first set of packets received by the second device from a third device; determine a second bitmap indicating a second set of packets received by the first device from the third device, each of the first set of packets and the second set of packets comprising at least a fragment of a PDU; transmit, to the second device, information indicating a third set of packets based on the first bitmap and based on the second bitmap, the third set of packets being unsuccessfully received by the first device from the third device; and receive a fourth set of packets from the second device based on transmission of the information indicating the third set of packets, the fourth set of packets including information from the third set of packets.

An apparatus may receive, from a second device over a first communications link, a first bitmap indicating a first set of packets received by the second device from a third device; determine a second bitmap indicating a second set of packets received by the first device from the third device, each of the first set of packets and the second set of packets comprising at least a fragment of a PDU; transmit, to the second device, information indicating a third set of packets based on the first bitmap and based on the second bitmap, the third set of packets being unsuccessfully received by the first device from the third device; and receive a fourth set of packets from the second device based on transmission of the information indicating the third set of packets, the fourth set of packets including information from the third set of packets.

A communication device communicates a radio frame including a preamble and a data field of a physical layer (PHY). The preamble includes an L-STF (Legacy Short Training Field), an L-LTF (Legacy Long Training Field), an L-SIG (Legacy Signal Field), an EHT-SIG-A (Extremely High Throughput Signal A Field), an EHT-STF, and an EHT-LTF, and the EHT-SIG-A includes a field indicating a standard that the radio frame complies with.

A device may receive packet data identifying packets exchanged between client devices via a network of network devices. The device may classify the packet data based on timestamps and protocols associated with the packets and to generate classified packet data. The device may group the classified packet data into packet data sets corresponding to packet flows between pairs of the client devices. The device may select a packet data set, from the packet data sets, based on one or more filtering criteria. The device may process the packet data set to determine whether the packet data set is associated with one or more problem packets. The device may perform one or more actions based on determining whether the packet data set is associated with one or more problem packets.

A device may receive packet data identifying packets exchanged between client devices via a network of network devices. The device may classify the packet data based on timestamps and protocols associated with the packets and to generate classified packet data. The device may group the classified packet data into packet data sets corresponding to packet flows between pairs of the client devices. The device may select a packet data set, from the packet data sets, based on one or more filtering criteria. The device may process the packet data set to determine whether the packet data set is associated with one or more problem packets. The device may perform one or more actions based on determining whether the packet data set is associated with one or more problem packets.

A PDCP status report can be transmitted with reduced radio resources by transmitting the reception success or failure of a series of PDCP service data units (SDUs) in the form of a bitmap when configuring the PDCP status report. A PDCP control packet data unit (PDU) is generated to communicate a status report to a transmitting node for one or more PDCP SDUs transmitted from the transmitting node. The PDCP control PDU includes a data/control (D/C) bit field to indicate the PDCP control PDU is a control PDU, a control PDU type field to indicate a type of corresponding control information, a sequence number field to indicate a first missing PDCP SDU, and a bitmap field for a variable length bitmap. A bit in the variable length bitmap indicates whether a corresponding one of the one or more PDCP SDUs has been successfully been received.

Embodiments herein disclose a method for handling PDCP operation by an EN-DC capable UE in a wireless communication system. The method includes receiving, by an EN-DC capable UE, LTE PDCP PDUs from the LTE RLC entity by a receiver LTE PDCP entity upon re-establishing LTE RLC entity based on the indication that indicates a PDCP version change from a LTE PDCP to a NR PDCP. Further, the method includes processing the LTE PDCP PDUs at the receiver LTE PDCP entity using a LTE format. Further, the method includes reestablishing the receiver LTE PDCP entity and a transmitter LTE PDCP entity of the UE.