FR2917555A3 - Multiplexed network system for motor vehicle, has master station and slave stations connected together by network, where each salve station has wake up units for waking up slave stations if frame concerns number of slave stations - Google Patents

Multiplexed network system for motor vehicle, has master station and slave stations connected together by network, where each salve station has wake up units for waking up slave stations if frame concerns number of slave stations Download PDF

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Publication number
FR2917555A3
FR2917555A3 FR0755716A FR0755716A FR2917555A3 FR 2917555 A3 FR2917555 A3 FR 2917555A3 FR 0755716 A FR0755716 A FR 0755716A FR 0755716 A FR0755716 A FR 0755716A FR 2917555 A3 FR2917555 A3 FR 2917555A3
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France
Prior art keywords
slave stations
station
wake
slave
frame
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FR0755716A
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French (fr)
Inventor
Jean-Michel Rocher
Chartier Murielle Ortis
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Renault SAS
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Renault SAS
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Priority to FR0755716A priority Critical patent/FR2917555A3/en
Publication of FR2917555A3 publication Critical patent/FR2917555A3/en
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Classifications

    • 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
    • H04L12/403—Bus networks with centralised control, e.g. polling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/12—Arrangements for remote connection or disconnection of substations or of equipment thereof
    • 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
    • H04L12/40006—Architecture of a communication node
    • H04L12/40039—Details regarding the setting of the power status of a node according to activity on the bus
    • 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
    • H04L2012/40208—Bus networks characterized by the use of a particular bus standard
    • H04L2012/40215—Controller Area Network CAN
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/50—Reducing energy consumption in communication networks in wire-line communication networks, e.g. low power modes or reduced link rate

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)

Abstract

The system (10) has a master station (20) and slave stations (12, 14) connected together by a multiplexed information communication network (21) e.g. controller area network (CAN) bus, where each of the slave stations presents wakeup and sleep states. The master station emits a wakeup frame on the network to wake up the slave stations, where the frame has information relative to the slave stations to be waken up. Each of the salve stations has wake up units (22, 24) e.g. microcontrollers, for waking up the slave stations if the frame concerns an identification number of the slave station.

Description

-1- SYSTEME MULTIPLEXE DE VEHICULE AUTOMOBILE-1- MULTIPLEX SYSTEM OF A MOTOR VEHICLE

La présente invention a trait au domaine aux systèmes à réseaux multiplexés de véhicule automobile dans lequel des fonctionnalités sont mises en oeuvre par intermittence. Plus particulièrement, la présente invention concerne un système multiplexé de véhicule automobile comportant au moins une station maître et des stations esclaves, raccordées entre elles par un réseau multiplexé de communication d'informations, chacune des stations esclaves présentant au moins un état réveillé et un état endormi et la station maître étant apte à émettre une trame de réveil des stations esclaves sur le réseau de communication. Dans un véhicule automobile, les fonctionnalités sont usuellement mises en oeuvre par une pluralité de stations raccordées entre elles par un réseau multiplexé de communication d'informations, tel qu'un bus CAN (pour Controller Area Network ) par exemple.  The present invention relates to the field of multiplexed network systems of a motor vehicle in which functionalities are implemented intermittently. More particularly, the present invention relates to a multiplexed motor vehicle system comprising at least one master station and slave stations, interconnected by a multiplexed information communication network, each of the slave stations having at least one woken state and one state asleep and the master station being able to emit a wake-up frame of the slave stations on the communication network. In a motor vehicle, the functionalities are usually implemented by a plurality of stations connected together by a multiplexed information communication network, such as a CAN (for Controller Area Network) for example.

Certaines de ces fonctionnalités, comme une commande de climatisation, une régulation de vitesse ou autres, sont activées par intermittence, à la demande du conducteur du véhicule. Afin de réduire la consommation d'énergie, les stations mettant en oeuvre ces fonctions intermittentes sont endormies lorsqu'il n'y a pas lieu de les utiliser.  Some of these features, such as climate control, cruise control, etc., are activated intermittently at the request of the driver of the vehicle. In order to reduce energy consumption, the stations employing these intermittent functions are asleep when there is no need to use them.

Dans les systèmes de l'état de la technique, comme par exemple celui décrit dans le document EP 1 460 552 Al, ces stations sont placées sous la supervision d'une station maître qui gère leur état réveillé ou endormi en fonction des besoins du moment en émettant sur le réseau des trames de réveil et d'endormissement. Toutefois, dans de tels systèmes, lorsqu'une fonctionnalité nécessite d'être mise en oeuvre, la station maître réveille l'ensemble des stations, y compris celles dont les fonctionnalités ne nécessitent pas d'être activée à cet instant. Il s'en suit alors une surconsommation d'énergie inutile.  In systems of the state of the art, such as for example that described in document EP 1 460 552 A1, these stations are placed under the supervision of a master station which manages their woken or asleep state according to the needs of the moment. by transmitting waking and sleeping frames on the network. However, in such systems, when a feature needs to be implemented, the master station wakes up all the stations, including those whose features do not need to be activated at this time. It follows then an overconsumption of unnecessary energy.

Le but de la présente invention est de résoudre le problème susmentionné en 30 proposant un système à réseau multiplexé qui réduit de manière sensible la surconsommation d'énergie liée au réveil inutile de stations.  The object of the present invention is to solve the above-mentioned problem by providing a multiplexed network system which significantly reduces the over-consumption of energy related to unnecessary waking of stations.

A cet effet, l'invention a pour objet un système à réseau multiplexé de véhicule automobile comportant au moins une station maître et des stations esclaves, raccordées entre 35 elles par un réseau multiplexé de communication d'informations, chacune des stations -2- esclaves présentant au moins un état réveillé et un état endormi et la station maître étant apte à émettre une trame de réveil des stations esclaves sur le réseau de communication, caractérisé en ce que la trame de réveil comporte des informations relatives aux stations esclaves devant être réveillées, et en ce que chacune des stations esclaves comporte des moyens de réveil de celle-ci lorsque la trame comporte des informations la concernant.  For this purpose, the subject of the invention is a multiplexed motor vehicle network system comprising at least one master station and slave stations connected together by a multiplexed information communication network, each of the slave stations. having at least one awakened state and a sleeping state and the master station being able to transmit a wake-up frame of the slave stations on the communication network, characterized in that the wake-up frame comprises information relating to the slave stations to be awakened, and in that each of the slave stations comprises means for waking it when the frame includes information relating to it.

Ainsi, ce système permet un réveil sélectif des stations esclaves. Seules les stations nécessitant réellement d'être réveillées le sont.  Thus, this system allows a selective wakeup of the slave stations. Only stations that really need to be awake are.

Selon d'autres caractéristiques, ce système comporte une ou plusieurs des caractéristiques suivantes : - les moyens de réveil présentent au moins un état endormi et un état réveillé et sont aptes à basculer de leur état endormi à leur état réveillé sur réception de la trame de réveil ; - les moyens de réveil sont aptes à basculer de leur état réveillé à leur état endormi lorsque la trame de réveil ne concerne pas la station esclave; -la station esclave comporte en outre des moyens d'endormissement aptes à endormir celle-ci lorsqu'une tâche qui lui a été attribuée est terminée ; et - il comporte une unique station maître en charge du réveil des stations esclaves.  According to other features, this system comprises one or more of the following characteristics: the waking up means have at least one sleeping state and one woken state and are able to switch from their dormant state to their woken state upon reception of the weave frame. awakening; the means of alarm are able to switch from their woken state to their dormant state when the wakeup frame does not concern the slave station; the slave station furthermore comprises sleep means capable of lulling the latter when a task assigned to it is over; and - it has a single master station responsible for waking the slave stations.

L'invention sera mieux comprise à la lecture de la description qui va suivre, donnée uniquement à titre d'exemple, et faite en relation avec les dessins annexés dans lesquels : - la figure 1 est une vue schématique d'un système selon l'invention ; et - la figure 2 est un organigramme d'un procédé de réveil et d'endormissement de stations esclaves entrant dans la constitution de la figure 1.  The invention will be better understood on reading the following description, given solely by way of example, and with reference to the accompanying drawings, in which: FIG. 1 is a diagrammatic view of a system according to FIG. invention; and FIG. 2 is a flowchart of a method for waking up and falling asleep of slave stations forming part of the constitution of FIG. 1.

Sur la figure 1, il est illustré sous la référence générale 10 un système à réseau multiplexé de véhicule automobile. Ce système 10 comporte des stations 12-20 raccordées par un réseau multiplexé 21 de communication d'informations, comme un bus CAN par exemple. Certaines de ces stations 12, 14 mettent en oeuvre de manière intermittente des fonctionnalités du véhicule. Par exemple, la station 12 met en oeuvre une régulation de la température de l'habitacle du véhicule lorsque le conducteur met en marche une climatisation et la station 14 met en oeuvre une régulation de la vitesse du véhicule activable depuis le tableau de bord du véhicule. -3-Les stations 12, 14 présentent un premier état réveillé dans lequel elles sont aptes à mettre en oeuvre leurs fonctionnalités et à échanger à cet effet des données sur le réseau 21, ainsi qu'un état endormi dans lequel elles sont inactives et n'échangent aucune information sur le réseau.  In Figure 1, there is illustrated generally a multiplex network system of a motor vehicle. This system 10 comprises 12-20 stations connected by a multiplexed network 21 of information communication, such as a CAN bus for example. Some of these stations 12, 14 intermittently implement vehicle functions. For example, the station 12 implements a regulation of the temperature of the passenger compartment of the vehicle when the driver starts an air conditioning and the station 14 implements a regulation of the speed of the vehicle activatable from the dashboard of the vehicle . The stations 12, 14 have a first woken state in which they are able to implement their functionalities and exchange for this purpose data on the network 21, as well as a sleeping state in which they are inactive and n exchange no information about the network.

D'autres stations 16, 18 mettent quant à elles des fonctionnalités de manière continue, comme la commande de l'injection de carburant dans les cylindres du moteur par exemple. Une des stations 12-20, par exemple la station 20, dite maître , commande de manière centralisée le réveil des stations 14 et 16 en émettant sur le réseau des trames de réveil. Par la suite, les stations 12 et 14 seront désignées par l'expression esclave du fait qu'elles sont sous le contrôle de la station maître 20. Selon l'invention, la station maître 20, qui reçoit du réseau 21 ou par d'autres moyens diverses informations sur des fonctionnalités du véhicule à activer comme cela est connu en soit, émet des trames qui comprennent des informations relatives aux stations esclaves 12, 14 qui doivent être réveillées. Par exemple, chaque station esclave est associée à un numéro d'identification de celle-ci gardé en mémoire dans la station maître 20. La station maître émet alors des trames de réveil comportant les numéros d'identification des stations esclaves devant être réveillées. Par ailleurs, chaque station esclave 12, 14 comporte des moyens 22, 24 de réveil, par exemple formés par les couches basses d'une unité de calcul de la station esclave 12, 14. Les couches basses d'une station sont formées des couches 1 à 6 du modèle ISO, comme cela est bien connu. En particulier, les couches basses comprennent une couche physique (la couche 1 du modèle ISO) qui détecte la présence de communication sur le réseau 21, une couche réseau (la couche 3 du modèle ISO) qui filtre des adresses transitant sur le réseau 21 pour ne garder que celle qui correspondent à la station et une couche de session (la couche 5 du modèle ISO) qui identifie la nécessité d'un réveil de la station. Les moyens de réveil 22, 24 présentent eux mêmes un état endormi et un état réveillé. Ces moyens 22, 24 scrutent en permanence le réseau 22 pour détecter la présence d'une trame de réveil transitant sur celui-ci et commandent le réveil de la station esclave 12, 14 en fonction de la nature de la trame de réveil, comme cela sera expliqué plus en détail par la suite. De manière avantageuse, les moyens 22, 24 sont choisis pour être peu gourmands en énergie. Par exemple, ces moyens 22, 24 sont réalisés sous la forme d'un microcontrôleur étant tout juste dimensionné pour effectuer le réveil de la station esclave décrit ci-après. -4- Enfin, chaque station esclave 12, 14 comprend des moyens 24, 26 d'endormissement qui commandent l'endormissement de celle-ci lorsqu'elle n'a plus de tâche à effectuer. La figure 2 illustre le procédé de réveil et d'endormissement d'une station esclave 12, 14.  Other stations 16, 18 put features in a continuous manner, such as the control of fuel injection in the engine cylinders for example. One of the stations 12-20, for example the station 20, said master, centrally controls the waking of the stations 14 and 16 by transmitting on the network wake-up frames. Subsequently, the stations 12 and 14 will be designated by the slave expression because they are under the control of the master station 20. According to the invention, the master station 20, which receives from the network 21 or by Other means various information on the functionalities of the vehicle to be activated as is known in itself, transmits frames which include information relating to the slave stations 12, 14 which must be woken up. For example, each slave station is associated with an identification number thereof stored in the master station 20. The master station then emits wake-up frames including the identification numbers of the slave stations to be woken up. Moreover, each slave station 12, 14 comprises means 22, 24 of alarm, for example formed by the lower layers of a calculation unit of the slave station 12, 14. The low layers of a station are formed layers 1 to 6 of the ISO model, as is well known. In particular, the lower layers comprise a physical layer (the layer 1 of the ISO model) which detects the presence of communication on the network 21, a network layer (the layer 3 of the ISO model) which filters addresses passing through the network 21 to keep only the one that corresponds to the station and a session layer (layer 5 of the ISO model) that identifies the need for a wake up station. The waking means 22, 24 themselves present a sleeping state and an awakened state. These means 22, 24 continuously scan the network 22 to detect the presence of a wake-up frame transiting on it and control the awakening of the slave station 12, 14 according to the nature of the wake frame, as this will be explained in more detail later. Advantageously, the means 22, 24 are chosen to be low in energy consumption. For example, these means 22, 24 are made in the form of a microcontroller being just sized to wake the slave station described below. Finally, each slave station 12, 14 includes sleep means 24, 26 which control the sleep of the latter when it has more task to perform. FIG. 2 illustrates the method of waking up and falling asleep of a slave station 12, 14.

Lors d'une étape 30, dans laquelle la station esclave 12, 14 est totalement endormie, ses moyens 22, 24 de réveil compris, les moyens 22, 24 de réveil scrutent l'occurrence d'une trame de réveil sur le réseau 21. A l'apparition d'une telle trame, les moyens 22, 24 de réveil basculent, en 32, dans leur état réveillé puis mettent en oeuvre, en 34, un test pour savoir si la trame de réveil concerne la station esclave, c'est-à-dire dans l'exemple précité, si la trame de réveil comprend le numéro d'identification de celle-ci. Si tel n'est pas le cas, les moyens 22, 24 de réveil rebasculent, en 36, dans leur état endormi et l'étape 36 boucle sur l'étape de scrutation 30. Si le résultat du test mis en oeuvre en 34 est positif, les moyens 22, 24 réveillent, en 38, totalement la station esclave 12, 14 qui devient alors capable de mettre en oeuvre sa fonctionnalité. En fonction, le cas échéant, d'informations émises sur le réseau 21 qui lui sont destinées, la station esclave 12, 14 met alors en oeuvre, en 40, différentes tâches, comme cela est connu en soi.  During a step 30, in which the slave station 12, 14 is completely asleep, its means 22, 24 for waking up, the means 22, 24 for waking watch the occurrence of a wake-up frame on the network 21. At the appearance of such a frame, the means 22, 24 of alarm switch to 32, in their waking state and then implement, at 34, a test to know if the wake frame is about the slave station, c ' that is to say in the above example, if the wake frame includes the identification number thereof. If this is not the case, the awakening means 22, 24 rebasculate at 36 in their asleep state and the step 36 loops on the scanning step 30. If the result of the test implemented at 34 is positive, the means 22, 24 wake up, at 38, completely the slave station 12, 14 which then becomes able to implement its functionality. In function, if any, of information transmitted on the network 21 which are intended for it, the slave station 12, 14 then implements, at 40, different tasks, as is known per se.

Une fois les tâches de la station esclave 12, 14 terminées, les moyens 26, 28 d'endormissement endorment, en 42, totalement celle-ci, y compris eux-mêmes et les moyens 22, 24 de réveil. Une fois la station esclave 12, 14 endormie, l'étape 42 boucle alors sur l'étape de scrutation 30. Ainsi, le système selon l'invention présente les avantages suivants : - le réveil des stations esclaves est sélectif. Seules les stations devant effectivement réaliser une tâche sont réveillées. Une économie d'énergie substantielle est donc réalisée ; - le réveil des stations esclaves est assuré par des moyens spécifiques peu gourmands en consommation. Ainsi, l'analyse des trames de réveil transitant sur le réseau ne consomme que très peu d'énergie. L'économie d'énergie est donc encore accrue par rapport à l'état de la technique ; - l'endormissement d'une station esclave est assuré par elle-même au travers de moyens d'endormissement dédiés. Celle-ci n'a donc pas à attendre une trame d'endormissement sur le réseau et bascule dans son état endormi plus rapidement. L'économie d'énergie est donc encore accrue par rapport à l'état de la technique. -5-  Once the tasks of the slave station 12, 14 are completed, the sleep means 26, 28 endorse, at 42, completely this, including themselves and the means 22, 24 of alarm. Once the slave station 12, 14 asleep, the step 42 then loop on the scanning step 30. Thus, the system according to the invention has the following advantages: - the alarm slave stations is selective. Only stations that actually have to perform a task are woken up. Substantial energy saving is therefore achieved; - The slave stations are woken up by specific means that are not very greedy for consumption. Thus, the analysis of wake-up frames transiting on the network consumes very little energy. Energy saving is thus further increased compared to the state of the art; - The sleep of a slave station is provided by itself through dedicated means of sleep. This one does not have to wait for a frame of sleep on the network and to rock in its dormant state more quickly. Energy saving is therefore even greater compared to the state of the art. -5-

Bien qu'il ait été décrit une unique station maître gérant les phases de réveil des stations esclaves, en variante il existe plusieurs stations maîtres capables de gérer ces phases.  Although it has been described a single master station managing the wake-up phases of the slave stations, alternatively there are several master stations capable of managing these phases.

Claims (5)

REVENDICATIONS 1. Système à réseau multiplexé (10) de véhicule automobile comportant au moins une station maître (20) et des stations esclaves (12, 14), raccordées entre elles par un réseau multiplexé de communication d'informations (21), chacune des stations esclaves (12, 14) présentant au moins un état réveillé et un état endormi et la ou chaque station maître (20) étant apte à émettre une trame de réveil des stations esclaves (12, 14) sur le réseau de communication (21), caractérisé en ce que la trame de réveil comporte des informations relatives aux stations esclaves (12, 14) devant être réveillées, et en ce que chacune des stations esclaves (12, 14) comporte des moyens (22, 24) de réveil de celle-ci lorsque la trame comporte des informations la concernant.  Motor vehicle multiplex network system (10) comprising at least one master station (20) and slave stations (12, 14) interconnected by a multiplexed information communication network (21), each of the stations slaves (12, 14) having at least one awakened state and a sleeping state and the or each master station (20) being adapted to transmit a wake-up frame of the slave stations (12, 14) on the communication network (21), characterized in that the wake-up frame comprises information relating to the slave stations (12, 14) to be woken up, and in that each of the slave stations (12, 14) comprises means (22, 24) for awakening said ci when the frame includes information about it. 2. Système selon la revendication 1, caractérisé en ce que les moyens (22, 24) de réveil présentent au moins un état endormi et un état réveillé et sont aptes à basculer de leur état endormi à leur état réveillé sur réception de la trame de réveil.  2. System according to claim 1, characterized in that the means (22, 24) for waking up have at least one sleeping state and a woken state and are able to switch from their dormant state to their awakened state on receipt of the frame of awakening. 3. Système selon la revendication 2, caractérisé en ce que les moyens (22, 24) de réveil sont aptes à basculer de leur état réveillé à leur état endormi lorsque la trame de réveil ne concerne pas la station esclave (12, 14).  3. System according to claim 2, characterized in that the means (22, 24) for waking are able to switch from their woken state to their dormant state when the wake frame does not affect the slave station (12, 14). 4. Système selon l'une quelconque des revendications précédentes, caractérisé en ce que la station esclave (12, 14) comporte en outre des moyens (24, 26) d'endormissement aptes à endormir celle-ci lorsqu'une tâche qui lui a été attribuée est terminée.  4. System according to any one of the preceding claims, characterized in that the slave station (12, 14) further comprises means (24, 26) for falling asleep to sleep when a task that has him been awarded is completed. 5. Système selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comporte une unique station maître en charge du réveil des stations esclaves.  5. System according to any one of the preceding claims, characterized in that it comprises a single master station responsible for waking slave stations.
FR0755716A 2007-06-13 2007-06-13 Multiplexed network system for motor vehicle, has master station and slave stations connected together by network, where each salve station has wake up units for waking up slave stations if frame concerns number of slave stations Withdrawn FR2917555A3 (en)

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WO2011032977A1 (en) * 2009-09-16 2011-03-24 Robert Bosch Gmbh Method and device for waking up consumers in a bus system and corresponding consumers
WO2011032926A1 (en) * 2009-09-17 2011-03-24 Robert Bosch Gmbh Method for operating a number of control devices
WO2011157595A1 (en) * 2010-06-16 2011-12-22 Bayerische Motoren Werke Aktiengesellschaft Method and controller for processing data in a network of a vehicle
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