Bottom layer judgement method of data effectiveness and its device

Application Number: 00124368
Application Date: 2000.09.07
Publication Number: 1342011
Publication Date: 2002.03.27
Priority Information:
International: H04L29/10
Applicant(s) Name: Huawei Technology Co. Ltd.
Inventor(s) Name: Yao Jun
Patent Agency Code: 11127
Patent Agent: song zhiqiang
Abstract The invention discloses a method and device for judging the validity of data in a PDH interface through bottom layer. The decoding function of interfacing chip in physical layer of shielded receiving end is used to judge the validity of data received, based on different changing rule of BPV signal in receiving end, with effective data and free data being transferred. The invention can detect the changing of code stream in real time. Combining the output signal of three states with the interrupt mechanism makes the receiving end work well under all sorts of input cases and switching in three states in time.