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1. (WO2017056154) COMMUNICATION DEVICE AND COMMUNICATION SYSTEM

Pub. No.:    WO/2017/056154    International Application No.:    PCT/JP2015/077322
Publication Date: Fri Apr 07 01:59:59 CEST 2017 International Filing Date: Tue Sep 29 01:59:59 CEST 2015
IPC: H04L 9/32
H04W 4/04
H04W 12/10
Applicants: MITSUBISHI ELECTRIC CORPORATION
三菱電機株式会社
Inventors: NISHIKATA, Yosuke
西潟 陽輔
Title: COMMUNICATION DEVICE AND COMMUNICATION SYSTEM
Abstract:
A reception counter storage unit (19) splits reception counter values into an upper byte and lower bytes, and stores said reception counter values. The reception counter storage unit (19) stores a value shared by a plurality of transmission sources as the upper byte, and stores values corresponding to each of the plurality of transmission sources as the lower bytes. A message determination unit (16) determines whether a message (20) is to be accepted by comparing a frame counter value included in the message (20), with the reception counter value generated from the value of the upper byte stored by the reception counter storage unit (19), and the value of the lower byte which corresponds to the transmission source of the message (20), and which is stored by the reception counter storage unit (19).