Patent ID: 8681712

Claim:
A re-establishment method for an Acknowledged Mode Radio Link Control entity, the method comprising: performing Acknowledged Mode Radio Link Control (AM RLC) entity re-establishment by a Radio Resource Control (RRC) entity; and if only a receiving side of the AM RLC entity is re-established, deleting all control protocol data units (PDUs) except for some control protocol data units (PDUs) related to a transmitting side of the AM RLC entity, wherein the PDUs related to the transmitting side of the AM RLC entity are a move receiving window upper-field (MRW SUFI) and a poll super-field (POLL SUFI); and if only the transmitting side of the AM RLC entity is re-established, deleting all control protocol data units (PDUs) except for some control protocol data units (PDUs) related to the receiving side of the AM RLC entity, wherein the PDUs related to the receiving side of the AM RLC entity are an acknowledgement status report, a window SUFI, and a move receiving window acknowledgment super-field (MRW ACK SUFI).