Data sending method and apparatus, and device
This disclosure provides a data sending method and apparatus, and a device, and pertains to the field of communications technologies. An example method includes: receiving an uplink data packet sent by UE; if a signaling message is carried in the uplink data packet, separating the signaling message from the uplink data packet, where the signaling message is used to request to establish a PDU session or request to activate an established PDU session; forwarding the signaling message to a control plane device; and before an available PDU session exists, forwarding, based on a data forwarding message carried in the uplink data packet sent by the UE, data in the uplink data packet sent by the UE.
1. A data sending method, wherein the method is applied to a base station device and comprises:
receiving an uplink data packet sent by user equipment (UE), wherein the uplink data packet includes a signaling message that requests to establish a packet data unit (PDU) session or to activate an established PDU session, a data forwarding message, and data that is separate from the signaling message and the data forwarding message;
forwarding the signaling message to a control plane device for establishing the PDU session or activating the established PDU session in response to the signaling message;
determining whether the data forwarding message comprises path information of the uplink data packet;
in response to determining that the data forwarding message comprises the path information, determining a target user plane network element (UPF) based on a quality of service (QoS) class identifier comprised in the path information;
in response to determining that the data forwarding message does not comprise the path information, selecting a target routing table based on network slice selection assistance information (NSSAI) comprised in the data forwarding message to determine the target UPF;
determining a shared link between the base station device and the target UPF;
and
without waiting for the PDU session to be established or the established PDU session to be activated, forwarding, based on the data forwarding message carried in the uplink data packet sent by the UE, the data in the uplink data packet sent by the UE.
2. The method according to claim 1 , wherein the determining the shared link between the base station device and the target UPF comprises:
determining whether the data forwarding message comprises path information of the uplink data packet;
in response to determining that the data forwarding message does not comprise the path information, searching the target routing table based on an Internet protocol (IP) address that is of a communications peer end and that is carried in the uplink data packet, to obtain the target UPF; and determining the shared link between the base station device and the target UPF based on a QoS class identifier comprised in the data forwarding message.
3. The method according to claim 1 , wherein the forwarding the data in the uplink data packet to the target UPF over the shared link comprises:
determining whether a transmission rate of the uplink data packet is less than a specified maximum bit rate (MBR) value; and
in response to determining that the transmission rate of the uplink data packet is less than the specified MBR value, forwarding the data in the uplink data packet to the target UPF over the shared link.
4. The method according to claim 1 , wherein the forwarding the signaling message to a control plane device comprises:
selecting a target access control and mobility management function (AMF) entity based on the NSSAI comprised in the data forwarding message; and
forwarding the signaling message to the target AMF entity.
5. The method according to claim 1 , wherein the method further comprises:
selecting a target AMF entity based on the NSSAI comprised in the data forwarding message; and
forwarding address information of the target UPF to the target AMF entity.