Transmission method and network device
摘要
說明書
For example, after the target CU performs admission control, if access to the terminal device is allowed, the target CU sends the handover preparation message to the target DU, to request the target DU to perform configuration for the terminal device. The message includes one of the following information or a combination of a plurality of pieces of the following information: identification information of the terminal device at an F1 interface (identification information of the terminal device on an F1AP CU side and identification information of the terminal device on an F1AP DU side, or independent identification information for the terminal device at the interface), context identification information of the terminal device (correlated with context information of the terminal device that is stored at the DU, for example, the context identification information of the terminal device may be a context ID of the terminal device or an ID in another format), an SRB list and/or a DRB list of the terminal device, F1 interface setup information (for example, a tunnel address on a CU side and a GTP-U TEID) corresponding to a DRB, and a cell ID (for example, a PCI or an ECGI).
S440. The fourth network node sends a cell radio network temporary identifier and/or a dedicated random access resource to the fifth network node based on the handover preparation message.
For example, after receiving the message, the DU allocates a C-RNTI2 and/or a dedicated RACH resource for the terminal device, and sends the C-RNTI2 and/or the dedicated RACH resource to the CU via the F1 interface. For example, information related to the RACH resource specifically includes beam identification information beam ID and a physical resource indication.
