Patent ID: 7468987
Filing Date: 2008-12-23
Classification: H04J

Abstract:
1. A method for detecting a frame format of a signal, the signal including a plurality of frames, the method comprising: receiving a first frame included in the plurality of frames; determining when a parity associated with the first frame and a first bit associated with the first frame indicate that a first counter is to be incremented; incrementing the first counter when it is determined that the first counter is to be incremented; determining when the signal is of a first format, wherein the determining includes comparing the first counter to a first threshold; determining when the signal is of a first format, the first format is one of an unknown format, a C-Bit format, and an M23 format, wherein the determining includes comparing the first counter to a first threshold; determining when the signal is of a second format when it is determined that the signal is not of the first format, the second format not of a same format as the first format but being one of the unknown format, the C-Bit format, and the M23 format, wherein determining when the signal is of the second format includes comparing the first counter to a second threshold; and identifying the signal as being of a third format when it is determined that the signal is not of the second format, the third format not of a same format as the first format and the second format but being one of the unknown format, the C-Bit format, and the M23 format.