SYSTEM FOR DETECTING COLLISION OF OPTICAL NETWORK OF BUS STRUCTURE,申请号JP19830058885-传众专利搜索

SYSTEM FOR DETECTING COLLISION OF OPTICAL NETWORK OF BUS STRUCTURE

申请公布号：JPS59183554(A)

申请号：JP19830058885

申请日期：1983.04.04

申请公布日期：1984.10.18

申请人：

NIPPON DENKI KK

发明人：MOCHIZUKI MOTOMU;ABE AKIO

分类号：H04N11/00;H04B10/272;H04L12/44;H04L12/46;H04N11/24

主分类号：H04N11/00

摘要：PURPOSE:To attain the effective utilization of a network by detecting the collision of optical signals on a transmission line within a go-and-back transmission time to a star coupler after a signal is transmitted from a communication device to the transmission line. CONSTITUTION:A transmission data transmitted from a main control section 100 of the communication device 10a to a transmission section 200 is synthesized with a collision detecting signal generated from a collision detecting signal generating circuit 203 at a CMI coding circuit 204 before the transmission data is transmitted from an electrooptic converting circuit 205 to a transmission optical fiber cable 30. Further, a collision detecting signal is transmitted while being added prior to the transmission data. The signal transmitted to the cable 30 is received by other communication devices 10b-10f via the star coupler 20, folded at the same time by the star coupler 20 and received also to an photoelectric converting circuit 305 of a receiving section 300 of the communication device 10a via a receiving optical fiber cable 40. The transmission data inputted to the converting circuit 305 and the collision detection signal are separated by a CMI decoding circuit 304.