摘要:
This application provides a data transmission method. A first access network device establishes a first DRB (data radio bearer) and a second DRB; the first access network device receives forwarded data packets from a second access network device; the first access network device maps, to the first DRB, a data packet in the forwarded data packets that includes no flow identifier, where the first DRB is corresponding to a DRB of the second access network device; and the first access network device maps, to the second DRB based on a second mapping relationship, a data packet in the forwarded data packets that includes a flow identifier, where the second mapping relationship is a mapping relationship between a flow and a DRB in the first access network device. Therefore, the following problem is avoided: In a handover or dual connectivity or another scenario, a data packet is lost or is repeatedly transmitted because each access network device independently configures a mapping relationship between a flow and a DRB. This improves terminal service continuity and improves communication quality.
摘要:
This application provides a communication method, a base station, and a terminal device. The communication method includes: obtaining, by a central unit (CU), a quality of service (QoS) parameter of a QoS data flow; mapping, by the CU, the QoS data flow to a bearer based on the QoS parameter of the QoS data flow; determining, by the CU, a QoS parameter of the bearer based on the QoS parameter of the QoS data flow; and sending, by the CU, the QoS parameter of the bearer to a distributed unit (DU). According to this application, the DU can schedule the bearer based on the QoS parameter of the bearer.
摘要:
Embodiments of this application provide a duplication (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.
摘要:
This application provides a data security processing method and an apparatus. The method includes: setting up a first PDU session, deriving, by a first base station, a first user plane key based on a received base key, and performing, by the first base station, security processing on user plane data in the first PDU session by using the first user plane key and a security algorithm; and setting up a second PDU session, deriving, by the first base station, a second user plane key based on the base key, and performing, by the first base station, security processing on user plane data in the second PDU session by using the second user plane key and the security algorithm, where the user plane key includes a user plane encryption key and/or a user plane integrity protection key. Different PDU sessions use different user plane keys, thereby improving data transmission security.
摘要:
Embodiments of this application provide a message identification method and apparatus. The method includes: receiving, by user equipment UE, a paging message sent by an access network device; determining, by the UE, a core network entity to which the paging message belongs in a plurality of core network entities serving the UE; and establishing, by the UE, a data connection to the core network entity to which the paging message belongs. According to the message identification method and apparatus provided in the embodiments of this application, the UE can connect to different core network entities.
摘要:
The present invention relates to the field of wireless communications technologies, and specifically, to a data transmission method and an apparatus. According to the data transmission method provided in embodiments of the present invention, a first security parameter indication is introduced into uplink data on a first bearer, and a base station can determine, based on the first security parameter indication in the uplink data, whether first security processing of the uplink data is performed by using a first security parameter or a second security parameter, so as to select a corresponding security parameter to perform second security processing, thereby resolving a problem that decrypted data at a confusion stage is incorrect, and enabling the uplink data to be uninterruptedly transmitted; and a second security parameter indication is introduced into downlink data, and UE can determine, based on the second security parameter indication in the downlink data, whether the first security processing of the data is performed by using the first security parameter or the second security parameter, so as to select a corresponding security parameter to perform the second security processing, thereby resolving a problem that decrypted data at a confusion stage is incorrect, and enabling the downlink data to be uninterruptedly transmitted.
摘要:
The present invention relates to the field of communications technologies, and specifically, to a mobility management method, an apparatus, and a system. Embodiments of the present invention provide the mobility management method, the apparatus, and the system. When a primary cell of user equipment is changed, a change of the primary cell is performed through modification but not through conventional handover, so that data transmission is uninterrupted when the primary cell is changed, thereby effectively improving service experience of a delay-sensitive service.
摘要:
A method and an apparatus for processing a fault in a multi-operator core network are disclosed. The method is applied to a first base station, where multiple operators share a network within coverage of the first base station, and the method includes: acquiring an identifier of a faulty operator, where the faulty operator is an operator whose network is faulty within coverage of the first base station; and notifying UE served by the first base station of the identifier of the faulty operator by using a specified message, so that the UE served by the first base station no longer accesses the network of the faulty operator within coverage of the first base station. In a scenario in which multiple operators share a network within coverage of a base station, when a network of one operator is faulty or networks of some operators are faulty (for example, an S1 link is faulty), in the present invention, UE served by the base station may be notified of an identifier of the faulty operator by using a specified message (such as a SIB message), so that the UE correctly determines which operators have a network fault, thereby avoiding an abnormal phenomenon such as a phenomenon that the UE still attempts to access the network of the faulty operator.
摘要:
The present invention provides a wireless network function configuration method, a wireless network node, and a core network device, so as to reduce a requirement on a bandwidth of a transport network while effectively reducing interference between cells and increasing a system capacity, thereby facilitating deployment and use of a C-RAN system. The method includes: determining, by a first wireless network node, a function configuration policy that is used by the first wireless network node and a second wireless network node to perform wireless network function configuration, where the function configuration policy includes a first part of wireless network functions that are of wireless network functions and implemented by the first wireless network node, and a second part of wireless network functions that are of the wireless network functions and implemented by the second wireless network node; and sending, by the first wireless network node and to the second wireless network node, function configuration information corresponding to the first part of wireless network functions that are in the function configuration policy and implemented by the second wireless network node, so that the second wireless network node completes function configuration of the second wireless network node according to the function configuration information.