Communication node and network system

[0019]Hereinafter, embodiments of the present invention will now be described in connection with the accompanying drawings. In the embodiments set forth below, the components identical with or similar to each other are given the same reference numerals for the sake of omitting redundant explanation.

Configurations of the Present Embodiment

[0020]FIG. 1A is a block diagram schematically showing a configuration of a network system according to the present embodiment. FIG. 1B is a block diagram showing one communication node with which the network is system is configured.

[0021]A network system 1 of the present embodiment constitutes an in-car network built in a vehicle such as a passenger car. As shown FIG. 1A, a plurality of communication nodes 10a to 10d are connected to a communication bus 5 which acts as a communication line. In the network system 1, the communication nodes 10a to 10d are configured to transmit / receive data to / from each other.

[0022]The communication nodes 10a to 10d