Data transmission through the protocol data unit session based on data routing policy

An apparatus comprising:

• at least one processor;
• and at least one memory, coupled to the at least one processor, and storing programming instructions that, when executed by the at least one processor, cause the apparatus to:
• send first information to a second node, wherein the first information is used to request to establish a first protocol data unit (PDU) session;
• receive second information sent by the second node, wherein the second information indicates an identifier of the first PDU session and a first quality of service (QoS) configuration policy corresponding to the first PDU session, wherein the first QoS configuration policy comprises at least one of a mapping relationship between a service flow identifier (QFI) and a differentiated service code point (DSCP) of data, a mapping relationship between the DSCP and a quality of service identifier (XQI), or a mapping relationship between an XQI and a QoS parameter;
• and
• receive third information sent by the second node, wherein the third information indicates a data routing policy corresponding to the first PDU session, and the data routing policy comprises session information of the first PDU session.