Circular optical communication system

Abstract

Abstract PURPOSE:To attain optical communication with high transmission efficiency, small transmission delay and high quality by providing an idle slot in response to a transmission capacity from a slave station on an optical transmission line in advance and sending a signal from the slave station to the idle slot. CONSTITUTION:Optical receivers 11, 12 of slave stations 7, 8 receive an optical signal 2 respectively, extract a clock and have the clock with the same frequency as that of a master station 3. In the case of sending an optical signal (a) from a 1st slave station 7, it is communicated in advance with the master station 3 and the master station 3 makes an idle slot 15 in matching with the quantity of information sent from the slave station 7 to a prescribed location of the transmission signal 2. Then the slave station 7 measures the timing from a frame header 113b and sends the optical signal (a) so as to be accommodated in the idle slot 15 and gives it on the optical fiber transmission line 1 via an optical tap 6. Thus, the communication with high transmission efficiency, small propagation delay and excellent quality is implemented.

Inventors

• 👤 Shigeru Oshima
• 👤 茂 大島
• 👤 Takeshi Koseki
• 👤 健 小関
• 👤 Harumi Fujima
• 👤 晴美 藤間
• 👤 Taro Shibagaki
• 👤 太郎 柴垣

Bibliographic Details