Abstract: A second access network node sends endpoint information of a second transmission path on the second access network node side to the first access network node. The second transmission path is a transmission path that is between the second access network node and a third access network node. The third access network node sends endpoint information of the second transmission path on the third access network node side to the first access network node. The first access network node sends the endpoint information of the second transmission path on the third access network node side to the second access network node, and sends the endpoint information of the second transmission path on the second access network node side to the third access network node.

Abstract: The present disclosure relates to communication methods. In one example method, a first network node sends, to a second network node on each of at least one user plane tunnel, a message for feeding back a downlink transmission status, where each message includes an indication used to indicate radio link outage or radio link resume between the first network node and a terminal device, and the at least one user plane tunnel is all user plane tunnels that are established at a communications interface between the first network node and the second network node and that are associated with the terminal device.

Abstract: The present disclosure relates to information transmission methods and network devices. One example method includes a second network node sends a first paging message to a first network node, where the first paging message comprises first configuration information corresponding to a terminal device, and the first configuration information comprises identification information of the terminal device and a paging cycle of the terminal device. The first network node determines paging occasion based on the first configuration information and configuration information of a cell served by the first network node. The first network node sends a third paging message based on the first paging message and the first paging configuration parameter, where the third paging message is used for paging the terminal device.

Abstract: Example data security processing methods and apparatus are described. One example method includes setting up a first PDU session. A first base station derives a first user plane key based on a received base key and performs security processing on user plane data in the first PDU session by using the first user plane key and a security algorithm. A second PDU session is set up. The first base station derives a second user plane key based on the base key and performs security processing on user plane data in the second PDU session by using the second user plane key and the security algorithm. The user plane key includes a user plane encryption key and/or a user plane integrity protection key.

Abstract: The present disclosure relates to connection establishment methods and apparatus. In one example method, a central unit (CU) function entity receives a first connection establishment request of a master device, where the first connection establishment request includes at least first identification information of a terminal, identification information of a first data radio bearer (DRB), identification information of a target cell, and interface information of the master device. The CU function entity sends a second connection establishment request to a distributed unit (DU) function entity to request the DU function entity to establish a connection to the master device, where the second connection establishment request includes at least second identification information of the terminal, the identification information of the first DRB, and the interface information of the master device.

Abstract: This application discloses an information transmission method in a communication system. According to the method, a master base station sends a request message to a secondary base station for requesting to transfer one or more flows from the master base station to the secondary base station for transmission to a terminal device. The request message carries one or both of identification information of each flow, and information of a data radio bearer (DRB) associated with each flow. The master base station receives a response message from the secondary base station, indicating whether each of the one or more flows is admitted or rejected by the secondary base station. Based on the identification information of the flows, DRBs are mapped to the flows. QoS management of information transmission is more refined, and requirements of 5G communication systems for QoS management of information transmission in a dual connectivity scenario can be met.

Abstract: Embodiments of this application provide a duplication mode communication processing method in a central unit-distributed unit (CU-DU) architecture. In a possible implementation, in a process of establishing a user plane tunnel between a CU and a DU by exchanging information about uplink tunnel endpoints and information about downlink tunnel endpoints, the DU provides an identity of a primary path to the CU, thereby implementing a duplication mode of a data radio bearer.

Abstract: This application provides a transmission method for retrieving old context of a terminal device, the method includes: a first network node sends a first message to a first system, where the first message is received from a terminal device and includes CRNTI allocated previously by the first network node for the terminal device; the first system sends a second message to the first network node, the second message comprises identification information of the terminal device which is in association with old context information of the terminal device that is stored at the first network node, and is used by the first network node to retrieve the old context information of the terminal device.

Abstract: Embodiments provide a network access method and a device. In accordance with the method, a preamble sequence may be received by a second network device from a terminal device on a time-frequency resource occupied by the preamble sequence. A transmit beam may be determined for sending an access response message to the terminal device. The access response message can be sent to the terminal device using the transmit beam. The second access device can send the access response message to the terminal device through beamforming, so that a coverage area of the second access device can be enlarged, directivity of data sent to the terminal device can be improved, and a probability that the terminal device receives the access response message is improved. Therefore, a rate that the terminal device succeeds in accessing the second access device is improved.

Abstract: Embodiments of this application provide a message sending method and apparatus. The method includes: receiving, by a distributed node DU, a Radio Resource Control RRC message and indication information that are sent by a central node CU, and sending, by the DU, the RRC message based on the indication information.

Abstract: Embodiments of the present application relate to the communications field, and provide example random access methods, apparatus, and systems, so that a terminal can access a beam in time. An example solution includes receiving, by a terminal, a plurality of signals sent by a first access device on a plurality of beams. A beam of a strongest signal in the plurality of beams is determined and a preamble signal for the beam of the strongest signal is generated. The preamble signal of the beam of the strongest signal is sent to the first access device, so that the first access device identifies, based on the received preamble signal, the beam selected by the terminal to access.

Abstract: Embodiments of this application provide a protocol layer distribution indication method and apparatus. The method includes: determining, by a CU, a protocol layer distribution manner between the CU and a DU; generating, by the CU, first protocol layer distribution information based on the protocol layer distribution manner; and sending, by the CU, the first protocol layer distribution information to the DU. The CU determines the protocol layer distribution manner between the CU and the DU, further generates the first protocol layer distribution information based on the protocol layer distribution manner, and sends the first protocol layer distribution information to the DU, so that the protocol layer distribution manner can be dynamically determined, and dynamically notified to the DU. The DU may also change a protocol layer distribution in a timely manner based on the received first protocol layer distribution information.

Abstract: The present invention relates to the field of mobile communications technologies, and in particular, to a resource allocation method, a service transmission method, and an apparatus, so as to resolve a technical problem of how to coordinately transmit, in a WLAN, a WLAN service and a to-be-offloaded service of a cellular network node. In embodiments of the present invention, resources separately allocated to an AP and the cellular network node are specified, and the AP and the cellular network node are separately notified of an allocation result. In this way, both the AP and the cellular network node transmit data on only the respective allocated WLAN resources, so as to avoid that the WLAN service and the to-be-offloaded service of the cellular network node contend for a channel.

Abstract: Techniques are provided for server-to-server interaction for content item selection. A system receives a request for one or more content items from a client device. In response to receiving the request, the system generates multiple content requests. Each content request is sent to a different content provider of multiple content providers. At least one of the content requests is transmitted over a network to a content provider that is remote relative to the system. The system receives multiple responses, each of which is from a different content provider of the multiple content providers. Each response identifies a different content item. The system makes a determination that at least one content item is associated with a particular web domain. The system selects, based on the determination, a particular content item of the plurality of content items and causes the particular content item to be transmitted to the client device.

Abstract: A data transmission method includes: sending, by the cellular access device, non-cellular access device addition request information to the non-cellular access device; receiving, by the cellular access device, non-cellular access device addition response information sent by the non-cellular access device; and receiving, by the cellular access device, the uplink data sent by the UE by using the resource of the non-cellular network.

Abstract: A method includes: receiving, by a first access device, a random access message sent by user equipment; and sending, by the first access device, first system information to the user equipment based on the random access message, where the first system information includes cell reselection information related to the first access device. According to the present invention, cell reselection information can be transferred in a random access procedure.

Abstract: A method includes: acquiring, by a second base station, time-frequency position information corresponding to cell key information of a first base station, where the time-frequency position information is used for determining a time-frequency position that is corresponding to the cell key information of the first base station and that is on a shared time-frequency resource, and the cell key information includes at least one of a cell-specific reference signal (CRS), a channel state indication-reference signal (CSI-RS), a physical broadcast channel (PBCH), and a synchronization signal. The method also includes performing, by the second base station, interference coordination on the first base station.

Abstract: An uplink service data transmission method and apparatus. The method includes: receiving, by a wireless local area network WLAN access point AP, first indication information sent by a cellular network access device, where the first indication information is used to instruct the WLAN AP that user equipment UE served by the cellular network access device has uplink service data on which service offloading needs to be performed to the WLAN AP; and sending, by the WLAN AP, second indication information to the UE according to the first indication information, where the second indication information is used to instruct the UE to send the uplink service data to the WLAN AP.

Abstract: The present application discloses a data transmission method, including: configuring, by a first network element, a Packet Data Convergence Protocol (PDCP) reordering time for a terminal; sending, by the first network element, the PDCP reordering time of the terminal to a second network element; sending, by the first network element, a PDCP data packet of the terminal to the second network element, where the PDCP reordering time of the terminal is used to determine a transmission priority of the PDCP data packet of the terminal on the second network element. According to embodiments of the present application, a data packet loss can be reduced.

Abstract: The present disclosure discloses a data transmission method, device, and system, and belongs to the field of communications technologies. The method includes: receiving a data packet sent by user equipment, where the data packet carries indication information used to instruct a base station to establish a specified data connection to the user equipment; generating a first key of the user equipment based on the indication information and a public key of the base station; and performing data transmission with the user equipment based on the first key of the user equipment. According to the data transmission method, the transmitted data can be encrypted and decrypted when there is no radio resource control connection between the base station and the user equipment, thereby improving data transmission security while ensuring data transmission efficiency.