METHOD AND FILTER SYSTEM FOR STORING INFORMATION ABOUT MESSAGES COMING IN VIA A SERIAL DATA BUS OF A COMMUNICATION NETWORK IN A USER OF THE NETWORK

• US 20110113107A1
• Filed: 03/06/2009
• Published: 05/12/2011
• Est. Priority Date: 03/10/2008
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Bailer, Franz, Horst, Christian, Hartwich, Florian
• Granted Patent: US 8,954,516 B2
• Time in Patent Office: Days
• US Class Current: 709/206
• CPC Class Codes: H04L 12/40032 Details regarding a bus interface enhancer
• CPC Class Codes: H04L 12/4625 Single bridge functionality, e.g. connection of two networks over a single bridge
• CPC Class Codes: H04L 2012/40215 Controller Area Network CAN
• CPC Class Codes: H04L 63/0227 Filtering policies mail message filtering H04L51/212

Abstract

A method and a filter system for storing information about messages coming in via a serial data bus of a communication network in a communication module of a user connected to the data bus, which are filtered using a filter system. In order to be able to implement a particularly simple and efficient storage of information about incoming messages even in the event of a great number of filter criteria, the invention provides for the filter system to include a list, which as list elements has one or multiple filter elements, which contain storage control information, and for a check to be performed on the basis of the storage control information as to whether information about an incoming message is to be stored, and information about an incoming message is stored if the check has determined that the information is to be stored.

Claims

1-11. -11. (canceled)

12. A method for storing information of messages coming in via a serial data bus of a communication network in a communication module of a user connected to the data bus, the method comprising:

filtering the messages using a filter system, the messages each having an identifier for identification and the properties of the filter system being defined by identifiers of messages stored in at least one list of the filter system, wherein the list has as list elements at least one filter element, which contains storage control information;

performing a check based on the storage control information as to whether information about an incoming message is to be stored; and

storing information about an incoming message if the check reveals that the information is to be stored.

13. The method of claim 12, wherein each filter element contains an identifier pair and the information about the incoming message is stored only if the identifiers of the incoming messages lie within the range defined by the identifier pair.

14. The method of claim 12, wherein information is stored about whether and at which storage location the message was stored and about whether the message was not stored due to a lack of storage space.

15. The method of claim 12, wherein, as information about the storage location, information is stored regarding in which buffer, and in particular in which location within the respective buffer, the message was stored.

16. The method of claim 12, wherein, if the information is stored, the application is notified by way of an interrupt request.

17. The method of claim 12, wherein a separate memory area is provided within the communication module for storing the information.

18. The method of claim 12, wherein the application has random access to individual data of the information stored within the memory element via a suitable interface.

19. The method of claim 17, wherein, following the storage of the information in the separate memory area, an interrupt request to the application is generated.

20. The method of claim 12, wherein an interrupt request to the application is generated as a function of the filling level of the buffers.

21. The method of claim 12, wherein multiple pairs of identifiers are stored in the at least one list of the filter system, which in each case define one range delimited by a first identifier and a second identifier and the identifier of an incoming message is compared at least to selected identifier pairs and a query is made as to whether the identifier of the incoming message is greater than or greater than or equal to the selected first identifier and smaller than or smaller than or equal to the selected second identifier, and the incoming message is forwarded or rejected as a function of the result of this check.

22. A filter system for storing information of messages coming in via a serial data bus of a communication network in a communication module of a user connected to the data bus, comprising:

a filtering arrangement to filter the messages, the messages each having an identifier for identification and the properties of the filtering arrangement being defined by identifiers of messages stored in at least one list of the filtering arrangement, wherein the list has as list elements at least one filter element, which contains storage control information;

a checking arrangement to perform a check based on the storage control information as to whether information about an incoming message is to be stored; and

a storing arrangement to store information about an incoming message if the check reveals that the information is to be stored.

23. The method of claim 22, wherein each filter element contains an identifier pair and the information about the incoming message is stored only if the identifiers of the incoming messages lie within the range defined by the identifier pair.

24. The method of claim 22, wherein information is stored about whether and at which storage location the message was stored and about whether the message was not stored due to a lack of storage space.

25. The method of claim 22, wherein, as information about the storage location, information is stored regarding in which buffer, and in particular in which location within the respective buffer, the message was stored.

26. The method of claim 22, wherein, if the information is stored, the application is notified by way of an interrupt request.

27. The method of claim 22, wherein a separate memory area is provided within the communication module for storing the information.

28. The method of claim 22, wherein the application has random access to individual data of the information stored within the memory element via a suitable interface.

29. The method of claim 27, wherein, following the storage of the information in the separate memory area, an interrupt request to the application is generated.

30. The method of claim 22, wherein an interrupt request to the application is generated as a function of the filling level of the buffers.

31. The method of claim 22, wherein multiple pairs of identifiers are stored in the at least one list of the filtering arrangement, which in each case define one range delimited by a first identifier and a second identifier and the identifier of an incoming message is compared at least to selected identifier pairs and a query is made as to whether the identifier of the incoming message is greater than or greater than or equal to the selected first identifier and smaller than or smaller than or equal to the selected second identifier, and the incoming message is forwarded or rejected as a function of the result of this check.