Classifications

• • G—PHYSICS
  • G06—COMPUTING; CALCULATING OR COUNTING
  • G06F—ELECTRIC DIGITAL DATA PROCESSING
  • G06F15/00—Digital computers in general; Data processing equipment in general
  • G06F15/16—Combinations of two or more digital computers each having at least an arithmetic unit, a program unit and a register, e.g. for a simultaneous processing of several programs
  • G06F15/163—Interprocessor communication
  • G06F15/17—Interprocessor communication using an input/output type connection, e.g. channel, I/O port
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
  • H04L12/00—Data switching networks
  • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
  • H04L12/40—Bus networks
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
  • H04L12/00—Data switching networks
  • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
  • H04L12/46—Interconnection of networks
  • H04L12/4604—LAN interconnection over a backbone network, e.g. Internet, Frame Relay
  • H04L12/462—LAN interconnection over a bridge based backbone
  • H04L12/4625—Single bridge functionality, e.g. connection of two networks over a single bridge
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
  • H04L12/00—Data switching networks
  • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
  • H04L12/40—Bus networks
  • H04L2012/40267—Bus for use in transportation systems
  • H04L2012/40273—Bus for use in transportation systems the transportation system being a vehicle

Definitions

• the invention relates to a method for data exchange between a plurality of subscribers who belong to different data bus systems.
• a data bus system adapted to this application is used for engine and chassis components, and a different data bus system that is particularly suitable for audio and telecommunications purposes.
• the data exchange between the different data bus systems takes place via gateways.
• the invention has for its object to provide a method for data exchange between the participants of different data bus systems, which despite a large number of participants, which also vary depending on the vehicle, has a high level of performance.
• the method according to the invention is modular and inexpensive. It enables basic components to be used in all vehicles across several model series from one manufacturer. The higher-quality vehicles can be equipped as required with additional components without being more expensive than comparable series systems.
• This data bus can be, for example, a data bus as described in DE 19636441 A and DE 19636442 A.
• This data bus is characterized by a data rate of more than 5 Mbit / s and is suitable, for example, for passive safety systems that include airbags, belt tensioners, etc., as well as the associated sensors and actuators and their control units.
• control units are located at various points in the vehicle, e.g. in the area of the center tunnel and the B-pillars, also in the door or on the steering column. All of these control units are connected to the data bus, which is under very little load in normal situations, i.e. outside of a crash or violent misuse phase. The same applies to the utilization of the processors in the control units.
• these control units are also used for other functions. These functions belong to other functionalities, for example the body electronics on the one hand and relate for example to the light control, the wiper control, the central locking and the window regulator control and on the other hand the data bus system for engine and chassis components.
• the gateway functionality is divided between the two already existing control devices of the faster data bus, with the possibility of providing any computing power that may be required with the computer that is already present in the control device.
• each of the two data bus systems into smaller sub-data bus systems, which each transfer their data to this data bus via one of the control devices connected to the faster data bus, or take it over from it.
• the scope of the body electronics can be divided into the light control and the wiper control on the one hand and the central locking and the window regulator control on the other. These are each part of a sub-data bus system, which has a sufficient response time due to the small number of participants (e.g. a control unit and connected consumers in light control) and is also functional at a low data rate, i.e. provides the connected participants with the required data quickly and securely. There is also the possibility of directly connecting control units that are part of the body electronics or engine management with higher communication requirements to the faster data bus.
• the block diagram shown in the figure contains, among other things, a control unit module SGM and control units designated S1 to S4. Together, these components are connected by a faster data bus "Sl-Bus" for a passive safety system with a data rate of 5Mbit / s, for example.
• Control units marked with "K” are connected to the control units SGM and S1 to S3, each of which is a separate one Sub-data bus system assigned to body electronics, K-bus cluster 1, K-bus cluster 2, K-bus cluster 3 and K-bus cluster 4.
• a data bus system C-bus assigned to the engine management system is connected to the control unit S4 with subscribers C.
• the Components SGM and S1 to S4 thus contain the functions of the passive safety system, the basic functions of the body electronics and functions of the engine management.
• some control units K are separate for further explanations with K1 or K2, within the C-bus a control unit with C1 characterized.
• control units SGM and S1 to S3 adapt the data of the participants of their connected sub-data bus systems in their format to the data format of the faster data bus.
• the control unit S4 does this for the data of the C-bus participants.
• the control units SGM and S1 to S4 also convert the data of the faster data bus from this format to the data format of the connected sub-data bus system or C-bus system.
• the data of all sub-data bus system participants and the participants of the C-bus system and the faster data bus Sl-Bus are provided with a unique identifier.
• the identifiers of the participants in the connected sub-data bus system or the C bus system are stored in the respective control unit.
• the particular advantage of the data bus structure according to the invention is that the number of telegrams per sub-data bus is significantly less than in the case of a data bus with only one line and the waiting time until a possible bus access is small due to the small number of subscribers.
• the participants of different data bus systems can communicate with one another without the need for a separate gateway computer.
• the K and C bus addresses in the overall system are unique.
• the corresponding C or K bus telegrams are converted according to a fixed rule to bus telegrams of the faster data bus with corresponding unique IDs.
• codable "mini gateway tables” then only implement the telegrams that are also required in the respective (sub) data bus system. When "moving" a control unit from one K sub-data bus system to another, only these gateway tables then have to be recoded. The overall system behavior thus remains absolutely unchanged.
• K1 sends the telegram TK1 on K-bus cluster 1, triggered z. B. by pressing a button.
• SGM receives TK1 and packs the telegram TK1 into the data field of an S1 bus telegram.
• All Sl-Bus participants receive TK1 in Sl-Bus format and look in their respective gateway tables to see whether TK1 should be translated to the associated K-Bus cluster.
• S1 unpacks TK1 from the Sl-Bus format and transmits TK1 to the K-Bus cluster 2.
• K2 receives TK1.
• Telegram length than that of the data of the SI bus e.g. B. 32 bytes of user data compared to 12 bytes of user data is a segmented, i.e. repeated transmission of defined telegram parts required.
• TK1 needs to be deleted from the gateway table of S1 and entered in the gateway table of S4.

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• Engineering & Computer Science (AREA)
• Computer Networks & Wireless Communication (AREA)
• Signal Processing (AREA)
• Computer Hardware Design (AREA)
• Theoretical Computer Science (AREA)
• Software Systems (AREA)
• Physics & Mathematics (AREA)
• General Engineering & Computer Science (AREA)
• General Physics & Mathematics (AREA)
• Small-Scale Networks (AREA)

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• 2000
  • 2000-05-26 DE DE10026246A patent/DE10026246A1/de not_active Ceased
• 2001
  • 2001-05-12 EP EP01940465A patent/EP1285349A2/de not_active Withdrawn
  • 2001-05-12 JP JP2002500212A patent/JP2003535533A/ja active Pending
  • 2001-05-12 US US10/296,343 patent/US7197592B2/en not_active Expired - Lifetime
  • 2001-05-12 WO PCT/EP2001/005435 patent/WO2001093065A2/de active Application Filing
  • 2001-05-12 KR KR1020027015855A patent/KR100746413B1/ko active IP Right Grant

Non-Patent Citations (1)

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