APPARATUS AND METHOD FOR ERROR CORRECTION ENCRYPTION IN A MOBILE COMMUNICATION SYSTEM CAPABLE OF CORRECTING ERRORS WHICH ARE GENERATED DURING ENCRYPTION AND DECRYPTION

摘要

PURPOSE: An apparatus and method for error correction encryption in a mobile communication system are provided to transfer a packet having no errors by compensating for errors between a base station and a terminal.;CONSTITUTION: A partial HFN(hyper frame number) is compared with a lower 8-bit HFN(905). The difference of the partial HFN and the lower 8-bit HFN is compared with 128(910). The HFN of a receiving device is determined to be greater than the HFN of a transmission device by comparing the HFN with 256(920). The lower 8-bit of the HFN is set to be equal to the partial HFN when the HFN of the receiving device is determined to be greater than the HFN of the transmission device(930). The receiving device sets up the lower 8-bit of the HFN to be equal to the partial HFN. The receiving device subtracts 256 from the HFN(925).;COPYRIGHT KIPO 2013;[Reference numerals] (905) Partial HFNlower 8-bit HFN?; (910) Partial HFN-lower 8-bit HFN128 ?; (915) lower 8-bit HFN- partial 8-bit HFN128 ?; (920) HFN=0x00000100?; (925) HFN=(HFN&11111100) (partial HFN) HFN=HFN-0x00000100; (930) HFN=(HFN&11111100) (patial HFN); (940) HFN=(HFN&11111100) (patial HFN) HFN=HFN+0x00000100; (AA) Start; (BB,DD, EE,HH) No; (CC,FF,GG,II) Yes; (JJ) End