Communication system capable of efficiently transmitting data from terminals to server

摘要

A communication system including a server and a plurality of terminals for communication applying Ethernet technology in a point-to-multipoint optical communication system. The server repeatedly assigning transmission periods to said terminals in a regular order, each of said terminals being permitted as a current terminal to transmit data stored in a buffer thereof to said server during an assigned transmission period assigned thereto by said server as a current transmission period. In each of said terminals a transmission controller is provided for transmitting a release request notification to said server in a case where the terminal finishes data transmission before the end of the assigned transmission period assigned to the terminal, and a transmission period assigning portion provided in said server for assigning a next transmission period following the current transmission period to a next terminal different from the current terminal, in response to the release request notification. <IMAGE>