Patent ID: 7903675

Claim:
A method for setting up a Point-to-Point Protocol (PPP) link for transmitting a packet between a Terminal Equipment (TE) and a first Interworking Function (IWF), which connects the TE and a packet network to each other, the method comprising the steps of: determining first option information to be used for a PPP link on a Um interface between a Mobile Terminal (MT) and a second IWF, through negotiation according to a Link Control Protocol (LCP) between the MT and the second IWF, when the TE transmits/receives a packet to/from the second IWF on account of a handover of the MT; checking if second option information used for a PPP link on an Rm interface between the MT and the TE is identical to the first option information; resetting the second option information through LCP negotiation between the MT and the TE in such a manner as to make the second option information be identical to the first option information, when it is determined that the first and second option information are not identical to each other as a result of the checking; and transmitting, by the MT, frames transmitted/received through PPP links between the TE and the second IWF without performing unframing and framing processes, when it is determined that the first and second option information are identical to each other as a result of the checking or when the second option information is reset to be identical to the first option information.