REAL TIME DISTRIBUTED SYSTEM

摘要

PROBLEM TO BE SOLVED: To improve the real time property of message transmission by providing the system with a network driver priority management part and a scheduling part for executing the processing of a network driver in accordance with the priority of network driver processing. SOLUTION: A massage ID transmits 300 messages. When the message ID starts a message transmission processing task for transmitting 100 messages thereafter during the start of a message transmission processing task in a CAN driver 2000, a schedular 2025 starts the task at priority '1' while referring to a task priority management table 2051 and temporarily allows the starting task to stand by at priority '3'. Thereby the message ID can store the 100 messages in a transmitting/receiving mail box 2023 prior to the 300 messages and request a CAN controller 2003 to transmit the stored message to a network 2005.