NETWORK DEVICE AND DATA SENDING AND RECEIVING SYSTEM

Title:

NETWORK DEVICE AND DATA SENDING AND RECEIVING SYSTEM

Document Type and Number:

WIPO Patent Application WO/2014/115455

Kind Code:

A1

Abstract:

In order to detect and prevent attacks in which the network is infested with unauthorized data to cause malfunction, the present invention aims, on the basis of network cycle information, to detect errors and to prevent unauthorized data forwarding in a network system such as a vehicle-mounted network. This network device is provided with a communication unit which receives data, a time management unit which manages the reception time at which data is received, and a control unit which processes data. If, for received data used as a reference, first data is received having the same identifier and a reception interval shorter than a prescribed cycle, the control unit waits to receive data having the same identifier as the first data from the reception time of the received data used as a reference up until the prescribed cycle has elapsed, and if during this interval second data is received having the same identifier as the first data, the control unit determines that an error has occurred and performs cycle anomaly detection processing (see fig. 1).

Inventors:

OTSUKA SATOSHI (JP)
ISHIGOOKA TASUKU (JP)
NARISAWA FUMIO (JP)
SASAZAWA KAZUYOSHI (JP)

Application Number:

PCT/JP2013/084209

Publication Date:

July 31, 2014

Filing Date:

December 20, 2013

Export Citation:

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Assignee:

HITACHI AUTOMOTIVE SYSTEMS LTD (JP)

International Classes:

H04L12/28; H04L12/46

Foreign References:

JP2007312193A	2007-11-29
JP2009253557A	2009-10-29
JP2008227591A	2008-09-25
JP2008236408A	2008-10-02
JP2007528621A	2007-10-11
JP2004193903A	2004-07-08

Other References: