公开(公告)号：JP2001144740A

公开(公告)日：2001-05-25

申请号：JP2000293220

申请日：2000-09-27

Applicant: LUCENT TECHNOLOGIES INC

Inventor： BAGHERI MEHRAN ,  MITCHELL JAIME T ,  WITINSKI RICHARD C

IPC: H04L1/00 ,  H04J3/06 ,  H04L7/08

Abstract: PROBLEM TO BE SOLVED: To improve frame matching in a data transmission system. SOLUTION: The receiver of the data transmission system checks bit positions related to a received data stream and decides the number of bits respectively coinciding with a prescribed bit pattern at the bit positions. The number for a certain bit position is compared with a 1st threshold and a 2nd threshold. When the number is equal to or greater than the 1st threshold, the bit position is specified as a position related to an erroneous framing pattern. When the number is equal to or greater than the 2nd threshold, the bit position is specified as a potential framing bit position, namely, a possible framing bit position. When a certain bit position is specified as a potential framing bit position and there is no other bit position specified as a bit position related to the erroneous framing pattern, a frame matching state is declared.