A method of header compression processing, comprising: configuring a header compression function between a first device and a second device through a control plane procedure; enabling the header compression function between the first device and the second device through the control plane procedure; in response to enabling the header compression function: sending, by a first device, an Ethernet frame on which Ethernet header compression is not performed to a second device, wherein the Ethernet frame on which the Ethernet header compression is not performed comprises complete Ethernet header information; sending, by the first device, an Ethernet frame on which the Ethernet header compression is performed to the second device, wherein the Ethernet frame on which the Ethernet header compression is performed comprises compressed Ethernet header information; wherein the Ethernet frame is an Ethernet packet data unit, PDU; and wherein the complete Ethernet header information comprises the following: context identifier information for identifying a context to which the complete Ethernet header information is applicable; a first indication information for indicating that the Ethernet header information in the Ethernet frame is complete; and wherein the compressed Ethernet header information comprises the following: context identifier information for identifying a context to which the compressed Ethernet header information is applicable; a second indication information for indicating that the Ethernet header information in the Ethernet frame is compressed; wherein both the context identifier information for identifying a context to which the complete Ethernet header information is applicable and the context identifier information for identifying a context to which the compressed Ethernet header information is applicable comprise at least one of a session identifier, a data flow identifier, and a bearer identifier, and the context is a session, a data flow or bearer. configuring a header compression function between a first device and a second device through a control plane procedure; enabling the header compression function between the first device and the second device through the control plane procedure; in response to enabling the header compression function: sending, by a first device, an Ethernet frame on which Ethernet header compression is not performed to a second device, wherein the Ethernet frame on which the Ethernet header compression is not performed comprises complete Ethernet header information; sending, by the first device, an Ethernet frame on which the Ethernet header compression is performed to the second device, wherein the Ethernet frame on which the Ethernet header compression is performed comprises compressed Ethernet header information; wherein the Ethernet frame is an Ethernet packet data unit, PDU; and wherein the complete Ethernet header information comprises the following: context identifier information for identifying a context to which the complete Ethernet header information is applicable; a first indication information for indicating that the Ethernet header information in the Ethernet frame is complete; and wherein the compressed Ethernet header information comprises the following: context identifier information for identifying a context to which the compressed Ethernet header information is applicable; a second indication information for indicating that the Ethernet header information in the Ethernet frame is compressed; wherein both the context identifier information for identifying a context to which the complete Ethernet header information is applicable and the context identifier information for identifying a context to which the compressed Ethernet header information is applicable comprise at least one of a session identifier, a data flow identifier, and a bearer identifier, and the context is a session, a data flow or bearer. sending, by a first device, an Ethernet frame on which Ethernet header compression is not performed to a second device, wherein the Ethernet frame on which the Ethernet header compression is not performed comprises complete Ethernet header information; sending, by the first device, an Ethernet frame on which the Ethernet header compression is performed to the second device, wherein the Ethernet frame on which the Ethernet header compression is performed comprises compressed Ethernet header information; wherein the Ethernet frame is an Ethernet packet data unit, PDU; and wherein the complete Ethernet header information comprises the following: context identifier information for identifying a context to which the complete Ethernet header information is applicable; a first indication information for indicating that the Ethernet header information in the Ethernet frame is complete; and wherein the compressed Ethernet header information comprises the following: context identifier information for identifying a context to which the compressed Ethernet header information is applicable; a second indication information for indicating that the Ethernet header information in the Ethernet frame is compressed; wherein both the context identifier information for identifying a context to which the complete Ethernet header information is applicable and the context identifier information for identifying a context to which the compressed Ethernet header information is applicable comprise at least one of a session identifier, a data flow identifier, and a bearer identifier, and the context is a session, a data flow or bearer.