Patent ID: 8811161

Claim:
A method of creating a service flow for ROHC (Robust Header Compression) comprising: upon receiving a subscriber profile to which ROHC is applied at a control station, obtaining a first ROHC parameter at the control station from a ROHC entity of the control station; transmitting a first message for reservation of a ROHC negotiation including the first ROHC parameter for requesting the creation of service flow at the control station to a base station; upon receiving the first message from the control station at the base station, determining whether or not the service flow creation request is accepted by verifying radio resources; performing a DSA (Dynamic Service Addition) procedure with a mobile station corresponding to the service flow through the use of a second message including the first ROHC parameter at the base station, wherein the DSA procedure is performed when it is determined that the service flow creation request is accepted; determining whether or not the ROHC negotiation is completed by the DSA procedure at the control station; and performing a DSC (Dynamic Service Change) procedure with the mobile station for completion of the ROHC negotiation at the base station, wherein the DSC procedure is performed when it is determined that the ROHC negotiation is not completed by the DSA procedure, wherein the control station is separate from the base station and the mobile station, and wherein the first ROHC parameter includes a ROHC context ID, the mapping relationship between the service flow and the ROHC context ID is 1:N, where N is a positive integer greater than one, and the mapping relationship between the ROHC context ID and an IP flow of ROHC packets received and transmitted by the service flow is 1:1.