Classifications

• • 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
  • H04L2012/40234—Local Interconnect Network LIN
• • 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

Definitions

• the invention relates to LIN type multiplex communication networks ("Local Interconnect Network”), which are in particular used in certain vehicles (possibly motor vehicles), and more specifically the control of the awakening of the slave organs of such LIN networks.
• Local Interconnect Network LIN type multiplex communication networks
• LIN type multiplex communication network is understood here to mean a communication network comprising a bus to which a management unit, called the master organ (or node), and functional organs, called slave members (or nodes), are connected.
• the master organ is particularly responsible for managing the sleep and wake up slave organs of its LIN network.
• slave organs of a LIN network have been placed in a waking state (at the request of the master organ), they wake up automatically when they detect activity on their bus. This activity comes either from a slave organ, which requires the awakening of the other organs of its LIN network, or from the master.
• the dominant state is the electrical level of the network corresponding to a logical "0".
• the recessive state is the electrical level of the network corresponding to a logical "1”.
• the logic level "0" is called the dominant level because it has priority when several slave organs want to impose different levels.
• any voluntary or involuntary phenomenon (parasites) leading to a recessive-dominant transition followed by a dominant state for a duration greater than a threshold is considered by an organ as an activity that should lead to its awakening.
• the master device when the master device detects an activity on the bus of its LIN network, it must determine if a slave organ of the latter is indeed at the origin of this activity.
• the LIN standard does not define the procedure to follow. If no slave organ is causing a wake up request
• the awakening is therefore unjustified, and in case of unjustified awakenings successive battery (in the case of implantation in a vehicle (possibly automotive)) can be discharged.
• the purpose of the invention is therefore to improve the situation, and in particular to manage the wake-up confirmation phases independently of the application and at the same level as the management of the network life phases.
• a method dedicated to controlling the wake-up of slave organs of a LIN type multiplexed communication network managed by a master device consisting, when the master device detects an activity in the network during a phase standby: i) to send to at least some of the slave devices (and preferably to all those that can be the cause of a wake up request and thus the detected activity) dedicated interrogation messages, which they must respectively respond with a response message having a status field whose value is representative of a local or non-local origin of the detected activity, and then ii) analyzing the value of the state field of each response messages received by the master organ to determine if at least one slave organ is causing the detected activity, and if so, whether the latter is justified in relation to the field strength value t, and iii) to allow the awakening of slave organs only if the activity detected is justified.
• each response message includes a state field whose value may for example be representative of a local or non-local origin of a detected activity and, in the case of a local origin, of the type of the the event that triggered this detected activity locally.
• the master organ in the absence of justification for a detected activity, can, for example, order the slave organs to get back into a waking state.
• step i) it is possible (when certain conditions relating to the slave members are met) to send dedicated interrogation messages by means of event frames.
• the invention also proposes a device intended to be part of a
• a master organ of a LIN type multiplex communication network to control the waking of slave organs of this LIN network, and arranged, when the master organ has detected an activity in the network during a standby phase: - to order the master organ to transmit to at least some of the slave organs (and preferably to all those that can be the cause of a wake up request and therefore the detected activity) messages dedicated response, to which they must respectively respond by means of a response message comprising a state field whose value is representative of a local or non-local origin of the detected activity, and then
• This device can also be arranged, when the response messages comprise a state field whose value is representative of a local or non-local origin of a detected activity and, in the case of a local origin, the type of the event that triggered this detected activity locally, to determine the justification of a detected activity based on the type of the event that triggered it locally.
• This device can also be arranged, in the absence of justification of a detected activity, to ask the master organ to order the slave organs to return to a waking state.
• the invention also proposes a master member intended to form part of a LIN type multiplex network and equipped with a control device of the type of the one presented above.
• FIG. 1 schematically illustrates a LIN type multiplex network, comprising five slave devices and a master device equipped with a control device according to the invention
• FIG. 2 schematically illustrates an example of message sequencing that makes it possible to achieve a wake up call
• the invention aims to provide a method and an associated device for controlling the awakening of the slave organs of a LIN type multiplex communication network.
• the network (type multiplex communication) LIN (R) is embedded in a motor vehicle, such as a car. But, the invention is not limited to this application. It concerns LIN networks regardless of their application.
• a management unit or node
• a LIN network according to the invention is not limited to this number (5) of slave members OEi. It must indeed include at least one slave organ.
• the master organ OM and the slave organs OEi can be of any type.
• it may be elements, equipment or components of the air-conditioning system or the system for controlling the translations of the windows or else door locking system.
• the master device OM can for example have a main device (or PLC) DP which is responsible for managing the different phases of life (PV watches and alarm clocks PR) of the slave members OEi of its network LIN R.
• this main device DP can be an integral part of the OM master member. But, in a variant, it could only be coupled to the master member OM. Therefore, a main device DP can be realized in the form of software modules (or computer), or electronic circuits, or a combination of electronic circuits and software modules.
• the invention proposes associating with the master unit OM a control device D which is more specifically responsible for controlling the awakening of the slave organs OEi.
• this control device D can be an integral part of the main device DP (it then constitutes a sub-part (or a sub-controller)). But, in a variant, it could only be coupled to this main device DP. Furthermore, in the absence of a main device DP, it could be an integral part of the master member OM or be coupled to the latter. Therefore, a control device D can be realized in the form of software modules (or computer), or electronic circuits, or a combination of electronic circuits and software modules.
• the control device D is responsible for implementing a control method according to the invention, whenever its OM master member detects an activity on the bus B during a standby phase PV. It is recalled that an activity may be due to the transmission by a slave member OEi, on the bus B, an MV network wake-up message, or to a parasite. But in either case, this activity is interpreted by the other slave organs OEi '(i' ⁇ i) as well as by the master organ OM as a wake-up command, and thus the latter go into phase PR alarm clock. Therefore, when the OM master member detects an activity on the bus B, it is warned of the awakening of the slave organs OEi.
• control method according to the invention comprises three main stages which will be described below with reference to the example of sequencing of messages illustrated in Figure 2.
• a first main step (i) of the method is triggered when the OM master member detects an activity on the bus B at a time t1 of a standby phase PV.
• the master unit OM detects at time t1 the presence of a wake up message MV which it interprets as an activity which must be immediately checked.
• beginning t2 of the transmission of the dedicated interrogation messages MDi corresponds substantially to the beginning of the wakeup phase PR of the slave organs OEi.
• each slave member OEi must immediately respond to the dedicated interrogation message MDi which concerns it by means of a response message MRi which includes a state field CE whose value is representative of a local origin or non-local activity detected.
• the state field CE can for example take two binary values, one (for example equal to 0) being intended to signal that no activity was triggered by an event occurring in the slave organ OEi considered (non-local origin), the other (for example equal to 1) being intended to signal that an activity was triggered by an event occurring in the slave organ OEi considered (local origin).
• the value of the state field CE of a response message MRi may also be representative of the type of the event that triggered an activity locally.
• the value of the state field CE is defined by at least two bits, so as to offer at least three different possibilities (a first to signal a non-local origin, a second to indicate a local origin corresponding to a first one). type of event and at least one third to indicate a local origin corresponding to a second type of event).
• the type of the event can be associated with the position of a bit in the status field of a response message MRi (it is recalled that a byte can encode up to eight types of messages). different event).
• This analysis which is carried out by the control device D, is intended to determine whether at least one slave organ OEi is at the origin of the activity that was detected during the first main step (i), and in the if this detected activity is justified with respect to the value of the associated EC state field. It is in effect to determine applicatively if a slave organ OEi, at the origin of a detected activity, was allowed or not to trigger this activity. It will be understood that the knowledge of the type of the event (or reason) which is at the origin of the triggering of an activity is particularly useful information for the control device D, since it can make it easier for its application to determine if the activity is justified or unjustified.
• a third main step (iii) of the method consists in allowing the master organ OM to confirm the awakening of the slave organs OEi only if the activity, detected during the first main step (i), was considered justified in the second main step (ii). It will be understood that it is the control device D that provides this authorization to the master device OM.
• the state field CE of the response message MR1 of the first slave member OE1 has not been entered because the latter had not had time to initialize (or to go into the wake up phase PR) at the moment when he received the dedicated interrogation message MD1 which was intended for him.
• the other slave organs OEi (and in particular the second OE2 and Nth OEN) have had the time to initialize and respond to their respective dedicated interrogation messages MDi.
• the state field CE of the response message MR2 of the second slave organ OE2 has the value a which signifies that it is at the origin of the activity detected, and the state field CE of the response message.
• MNR of the Nth slave member OEN has the value b which means that it is not at the origin of the detected activity. Note that the organ that is the initiator of a wake up request is necessarily initialized and ready to respond from the first dedicated interrogation message MDi.
• the control device D when analyzing the values of the status field CE of the response messages MRi the control device D estimates that the activity of the second slave member OE2 was justified. Therefore, he authorizes his master organ OM to confirm the awakening of the slave organs OEi.
• a "normal" operating phase PF of the slave organs OEi can then begin at a time t3 (which also marks the end of the wake up phase PR of the slave members OEi). In fact, this normal operating phase PF starts when the master unit OM first transmits on the bus B, to the slave members OEi, a functional programming table TF which defines the operations that they are going to perform respectively.
• control device D estimates that an activity was unjustified, then it asks the master organ OM to order the slave organs OEi to return to a waking state.
• the master unit OM conventionally transmits on the bus B (and moment t3), a sleep message to the slave organs OEi, so that they go back to PV standby phase.
• the normal operating phase PF mentioned above is then replaced by a standby phase PV.
• the invention is not limited to the embodiments of control method, control device and master member described above, only by way of example, but it encompasses all variants that may be considered by the man of art within the scope of the claims below.

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• Engineering & Computer Science (AREA)
• Computer Networks & Wireless Communication (AREA)
• Signal Processing (AREA)
• Small-Scale Networks (AREA)
• Data Exchanges In Wide-Area Networks (AREA)
• Mobile Radio Communication Systems (AREA)
• Measuring And Recording Apparatus For Diagnosis (AREA)
• Alarm Systems (AREA)

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• 2009
  • 2009-03-12 FR FR0951534A patent/FR2943154B1/fr not_active Expired - Fee Related
• 2010
  • 2010-03-05 WO PCT/FR2010/050374 patent/WO2010103220A1/fr active Application Filing
  • 2010-03-05 CN CN201080011017.7A patent/CN102349060B/zh not_active Expired - Fee Related
  • 2010-03-05 BR BRPI1005955-5A patent/BRPI1005955A2/pt not_active IP Right Cessation
  • 2010-03-05 RU RU2011141266/08A patent/RU2519025C2/ru not_active IP Right Cessation
  • 2010-03-05 EP EP10714924A patent/EP2406721A1/fr not_active Withdrawn
  • 2010-03-11 AR ARP100100766A patent/AR076114A1/es not_active Application Discontinuation

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