Patent ID: 8005115

Claim:
A method of transferring a data block to a receiving side by a transmitting side in a wireless communication system, the method comprising: generating, by a first lower layer having a header compression function, at least one of a control packet and a data packet including at least part of an upper layer data block transferred from an upper layer; generating, by the first lower layer, a first lower layer data block including each of the generated at least one packet to transfer the first lower layer data block to a second lower layer lower than the first lower layer, and wherein the control packet includes control information not associated with the upper layer data block, and the method comprises: transferring first indication information from the first lower layer to the second lower layer, the first indication information indicating whether the first lower layer data block includes the control packet or the data packet; transferring first type indication information from the first lower layer to the second lower layer if the first indication information indicates that the first lower layer data block includes the control packet, the first type indication information indicating a type of control packet included in the first lower layer data block; generating, by the second lower layer, a second lower layer data block based on at least one of the first indication information and the first type indication information, the second lower layer data block including at least part of the first lower layer data block transferred from the first lower layer; transmitting, to the receiving side, second indication information indicating whether the first lower layer data block of which at least part is included in the second lower layer data block includes the control packet or the data packet; and transmitting, to the receiving side, second type indication information if the second indication information indicates that the first lower layer data block of which at least part is included in the second lower layer data block includes the control packet, the second type indication information indicating a type of the control packet included in the second lower layer data block.