Data packet processing method and apparatus

A data packet processing method, comprising:

• receiving, by a policy and charging enforcement function (PCEF), a fourth message that is sent by a policy and charging rules function (PCRF), wherein the fourth message comprises a first identifier and policy information corresponding to the first identifier;
• sending, by the PCEF, a fifth message to a storage apparatus for requesting the storage apparatus for data flow characteristic information corresponding to the first identifier, wherein the fifth message comprises the first identifier, and the storage apparatus is configured to store a correspondence between an identifier and data flow characteristic information;
• and
• receiving, by the PCEF, a sixth message that is sent by the storage apparatus, wherein the sixth message comprises the data flow characteristic information corresponding to the first identifier.

A storage apparatus, comprising:

• a processor, and
• a non-transitory computer-readable storage medium storing a program to be executed by the processor, the program including instructions for:
• receiving information indicating a correspondence between an identifier and data flow characteristic information that is sent by a 3rd party application server (AS),
• receiving a fifth message that is sent by a policy and charging enforcement function (PCEF), wherein the fifth message comprises a first identifier, and the fifth message is used to request the storage apparatus for data flow characteristic information corresponding to the first identifier,
• determining, according to the first identifier and the correspondence, the data flow characteristic information corresponding to the first identifier, and
• sending a sixth message to the PCEF, wherein the sixth message comprises the data flow characteristic information corresponding to the first identifier.

A policy and charging enforcement function (PCEF), comprising

• a processor, and
• a non-transitory computer-readable storage medium storing a program to be executed by the processor, the program including instructions for:
• receiving a fourth message that is sent by a policy and charging rules function (PCRF), wherein the fourth message comprises a first identifier and policy information corresponding to the first identifier;
• sending a fifth message to a storage apparatus for requesting the storage apparatus for data flow characteristic information corresponding to the first identifier, wherein the fifth message comprises the first identifier, and the storage apparatus is configured to store a correspondence between an identifier and data flow characteristic information;
• and
• receiving a sixth message that is sent by the storage apparatus, wherein the sixth message comprises the data flow characteristic information corresponding to the first identifier.

A service capability exposure function (SCEF), comprising:

• a processor, and
• a non-transitory computer-readable storage medium storing a program to be executed by the processor, the program including instructions for:
• receiving a second message that is sent by a 3rd party application server (AS), wherein the second message comprises a first identifier and policy information corresponding to the first identifier, and
• sending a third message to a policy and charging rules function (PCRF), wherein the third message comprises the first identifier and the policy information.