KR20180038970A - Operation method of communication node for selective wakeup in vehicle network - Google Patents

Abstract

A method for operating a communication node for time synchronization in a vehicle network is disclosed. According to the present invention, the method for operating a communication node is a method for operating a first communication node among a plurality of communication nodes included in a vehicle network based on Ethernet. The method comprises the steps of: measuring a first link delay to perform time synchronization with a second communication node included in the plurality of communication nodes; calculating a difference between the first link delay and an average value of a plurality of link delays measured before the first link delay; comparing the calculated difference with a preset first threshold value to control a measurement cycle of a link delay on the second communication node; and controlling the measurement cycle of the link delay on the second communication node based on a comparison result.

Description

[0001] OPERATION METHOD OF COMMUNICATION NODE FOR SELECTIVE WAKEUP IN VEHICLE NETWORK [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of operating a communication node for selective wake-up in a vehicle network, and more particularly, to a method and apparatus for selectively activating a wake-up message for a plurality of communication nodes included in an Ethernet- To an operation method of a communication node.

BACKGROUND ART [0002] With the rapid progress of electronicization of vehicle parts, the types and number of electronic devices mounted on vehicles have been greatly increased. Electronic devices can be largely used in a power train control system, a body control system, a chassis control system, a vehicle network, a multimedia system, and the like. The powertrain control system may mean an engine control system, an automatic shift control system, and the like. The body control system may refer to a body electrical equipment control system, a convenience device control system, a lamp control system, and the like. The chassis control system may refer to a steering control system, a brake control system, a suspension control system, and the like. The vehicle network may refer to a controller area network (CAN), a FlexRay-based network, or a MOST (media oriented system transport) based network. The multimedia system may refer to a navigation system, a telematics system, an infotainment system, or the like.

The electronic devices constituting each of these systems and systems are connected through a vehicle network, and a vehicle network is required to support the functions of each of the electronic devices. CAN can support transmission rates of up to 1Mbps, support automatic retransmission of collided frames, and support CRC (cyclic redundancy check) based error detection. FlexRay-based networks can support transmission speeds of up to 10 Mbps, support simultaneous transmission of data over two channels, and synchronous data transmission. The MOST-based network is a communication network for high-quality multimedia and can support transmission rates of up to 150Mbps.

On the other hand, vehicle telematics systems, infotainment systems, and enhanced safety systems require high transmission speeds and system scalability, and CAN and FlexRay-based networks do not fully support them. MOST-based networks can support higher transmission speeds than CAN- and FlexRay-based networks, but MOST-based networks are costly for all vehicle networks. Due to these problems, an Ethernet based network can be considered as a vehicle network. An Ethernet-based network can support bidirectional communication through a pair of windings and can support transmission rates up to 10 Gbps.

Specifically, an Ethernet-based vehicle network may include a plurality of communication nodes (e. G., Electronic devices and switches, etc.) that perform Ethernet based communication. A first communication node that performs a function of a switch among a plurality of communication nodes included in the vehicle network transmits a wake-up message to all communication nodes connected to the first communication node in a wake-up state do. At this time, all the communication nodes connected to the first communication node can receive the wakeup message from the first communication node even when the wakeup state is not required. Accordingly, all of the communication nodes connected to the first communication node that performs the function of the switch can be unnecessarily woken up, and the power is wasted.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an operation method of a communication node for selectively transmitting a wake-up message among a plurality of communication nodes in an Ethernet-based vehicle network.

According to another aspect of the present invention, there is provided a method of operating a communication node for selective wake-up in a vehicle network, the method comprising: receiving, by a first communication node among a plurality of communication nodes included in an Ethernet- CLAIMS What is claimed is: 1. A method comprising: receiving a first message requesting an update of software for a second one of the plurality of communication nodes; setting a port for wake-up of the second communication node based on a path of the first communication node and a second message instructing wake-up of the second communication node through the set port And providing an update of the software to the second communication node based on the path corresponding to the set port.

Here, the first message may be received from an on-board diagnostic (OBD) device capable of diagnosing a plurality of communication nodes included in the vehicle network.

Here, the step of setting the port for wake-up may include a step of setting a port for wake-up based on an address table including information on a plurality of communication nodes connected through the plurality of ports included in the first communication node, You can set the port for wakeup.

Here, the address table may include a number of a plurality of ports included in the first communication node, a medium access control (MAC) address of a plurality of communication nodes connected through the plurality of ports, a virtual LAN identifier (VLAN ID) And a value indicating whether to wake up the plurality of communication nodes connected through the plurality of ports.

Wherein setting the port for wake-up comprises: checking the path between the first communication node and the second communication node based on the MAC address of the second communication node in the address table; Identifying a first port corresponding to a MAC address of the second communication node among a plurality of ports included in the node and setting the identified first port as a port for waking up the second communication node Step < / RTI >

Here, the step of setting to the port for wakeup may set a value indicating whether to wake up the first port so that the second communication node indicates that the wake-up is the target of wake-up.

Wherein providing the update of the software comprises obtaining software for updating the software of the second communication node in the memory of the first communication node and generating a third message including the acquired software And transmitting to the second communication node via the established port.

Herein, when the fourth communication node receives the fourth message indicating that the software of the second communication node has been updated through the set port, the operation method of the first communication node transmits the set port to the port for waking up the second communication node As shown in FIG.

According to another aspect of the present invention, there is provided a method of operating a communication node for selective wake-up in a vehicle network, the method comprising: receiving, by a first communication node among a plurality of communication nodes included in an Ethernet- A method of operating, comprising: receiving a first message requesting a diagnostic of a second one of the plurality of communication nodes; determining, based on a path between the first communication node and the second communication node, Setting a port for wake-up of the second communication node, transmitting a second message indicating a wake-up of the second communication node via the set port, And performing diagnosis for the second communication node based on the path corresponding to the set port.

Here, the first message may be received from an on-board diagnostic (OBD) device capable of diagnosing a plurality of communication nodes included in the vehicle network.

Here, the step of setting the port for wake-up may include a step of setting a port for wake-up based on an address table including information on a plurality of communication nodes connected through the plurality of ports included in the first communication node, You can set the port for wakeup.

Here, the address table may include a number of a plurality of ports included in the first communication node, a medium access control (MAC) address of a plurality of communication nodes connected through the plurality of ports, a virtual LAN identifier (VLAN ID) And a value indicating whether to wake up the plurality of communication nodes connected through the plurality of ports.

Wherein setting the port for wake-up comprises: checking the path between the first communication node and the second communication node based on the MAC address of the second communication node in the address table; Identifying a first port corresponding to a MAC address of the second communication node among a plurality of ports included in the node and setting the identified first port as a port for waking up the second communication node Step < / RTI >

Here, the step of setting to the port for wakeup may set a value indicating whether to wake up the first port so that the second communication node indicates that the wake-up is the target of wake-up.

Wherein the step of performing the diagnosis on the second communication node comprises the steps of transmitting a third message instructing to perform the diagnosis operation indicated by the first message to the second communication node through the set port, Receiving a fourth message from the second communication node, the fourth message including information about a result of performing the diagnostic operation, and performing a diagnosis for the second communication node based on a result of performing the diagnostic operation have.

Here, when the fifth communication node receives the fifth message indicating that the diagnosis for the second communication node is completed through the set port, the method further comprises: To the port for the < / RTI >

According to another aspect of the present invention, there is provided a communication node performing a method of operating a communication node for selective wake-up in a vehicle network, the communication node including a plurality of communication nodes included in an Ethernet- The first communication node comprising a processor and a memory in which at least one instruction executed via the processor is stored, wherein the at least one instruction is an on-board diagnostic (OBD) ) Receives a first message from the device requesting an update of software for a second one of the plurality of communication nodes, and transmits, via each of the plurality of ports included in the first communication node, Setting a port for wakeup based on an address table including information on a plurality of connected communication nodes, Transmitting a second message indicating a wake-up of the second communication node through a predetermined port, and updating the software for the second communication node based on the path corresponding to the set port And to release the set port on the port for waking up the second communication node when receiving a fourth message indicating that the software of the second communication node has been updated via the set port.

Here, the address table may include a number of a plurality of ports included in the first communication node, a medium access control (MAC) address of a plurality of communication nodes connected through the plurality of ports, a virtual LAN identifier (VLAN ID) And a value indicating whether to wake up the plurality of communication nodes connected through the plurality of ports.

The at least one command may identify a path between the first communication node and the second communication node based on the MAC address of the second communication node in the address table in the step of setting the port for wakeup Identifying a first port corresponding to a MAC address of the second communication node among a plurality of ports included in the first communication node, and identifying the first port as an object of wake-up And to set a value indicating whether the wake-up of the first port is to be wake-up.

Wherein the at least one command obtains software for updating the software of the second communication node in a memory of the first communication node in the process of providing an update of the software, And to transmit an included third message to the second communication node via the established port.

According to the present invention, it is possible to update the software for a plurality of communication nodes included in a vehicle network, or to selectively transmit a wakeup message to a communication node that requires updating or diagnosis of software, . In addition, the method of operating a communication node according to the present invention has an effect of preventing power consumption of a communication node from being wasted by efficiently managing states of a plurality of communication nodes included in a vehicle network.

1 is a block diagram illustrating an embodiment of a topology of a vehicle network.
2 is a block diagram showing an embodiment of a structure of a communication node constituting a vehicle network.
3 is a conceptual diagram illustrating a vehicle network according to an embodiment of the present invention.
4 is a flowchart illustrating a method of operating a communication node for selective wakeup in a vehicle network according to an embodiment of the present invention.
5 is a flowchart illustrating a method of setting a port for wake-up in a vehicle network according to an embodiment of the present invention.
6 is a flow diagram illustrating a method for providing software updates in a vehicle network in accordance with one embodiment of the present invention.
7 is a flowchart illustrating a method of operating a communication node for selective wakeup in a vehicle network according to another embodiment of the present invention.
8 is a flowchart illustrating a method of setting a port for wake-up in a vehicle network according to another embodiment of the present invention.
9 is a flow chart illustrating a method of performing diagnostics in a vehicle network according to another embodiment of the present invention.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the relevant art and are to be interpreted in an ideal or overly formal sense unless explicitly defined in the present application Do not.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In order to facilitate the understanding of the present invention, the same reference numerals are used for the same constituent elements in the drawings and redundant explanations for the same constituent elements are omitted.

1 is a block diagram illustrating one embodiment of a network topology of a vehicle network.

1, a communication node constituting a vehicle network may refer to a gateway, a switch (or a bridge), an end node, or the like. The gateway 100 may be connected to at least one switch 110, 110-1, 110-2, 120, or 130, and may connect different networks. For example, the gateway 100 may include a switch that supports a controller area network (CAN) (or FlexRay, media oriented system transport (MOST), local interconnect network (LIN) (Ethernet) protocol can be connected between the switches. Each of the switches 110, 110-1, 110-2, 120 and 130 may be connected to at least one end node 111, 112, 113, 121, 122, 123, 131, 132, Each of the switches 110, 110-1, 110-2, 120 and 130 may interconnect the end nodes 111, 112, 113, 121, 122, 123, 131, 132 and 133, It is possible to control the nodes 111, 112, 113, 121, 122, 123, 131, 132,

The end nodes 111, 112, 113, 121, 122, 123, 131, 132 and 133 may mean an electronic control unit (ECU) for controlling various devices included in the vehicle. For example, the end nodes 111, 112, 113, 121, 122, 123, 131, 132, 133 may be infotainment devices (e.g., a display device, a navigation device, (An around view monitoring device), and the like.

The communication nodes (i.e., gateways, switches, end nodes, etc.) that constitute the vehicle network may be a star topology, a bus topology, a ring topology, a tree topology, Topology, and so on. Further, each of the communication nodes constituting the vehicle network may support the CAN protocol, the FlexRay protocol, the MOST protocol, the LIN protocol, the Ethernet protocol, and the like. Embodiments according to the present invention can be applied to the network topology described above, and the network topology to which the embodiments according to the present invention are applied is not limited to this, and can be variously configured.

2 is a block diagram showing an embodiment of a structure of a communication node constituting a vehicle network.

Referring to FIG. 2, a communication node 200 constituting a vehicle network may include a PHY layer unit 210 and a controller unit 220. In addition, the communication node 200 may further include a regulator (not shown) for supplying power. At this time, the controller unit 220 may be implemented including a medium access control (MAC) layer. PHY layer unit 210 may receive signals from other communication nodes or may transmit signals to other communication nodes. The controller unit 220 may control the PHY layer unit 210 and may perform various functions (e.g., infotainment function, etc.). The PHY layer unit 210 and the controller unit 220 may be implemented as one SoC (System on Chip) or a separate chip.

The PHY layer unit 210 and the controller unit 220 may be connected through a media independent interface (MII) 230. The MII 230 may refer to an interface defined in IEEE 802.3, and may be configured as a data interface and a management interface between the PHY layer unit 210 and the controller unit 220. One of the interfaces of RMII (reduced MII), GMII (gigabit MII), RGMII (reduced GMII), SGMII (serial GMII) and XGMII (10 GMII) may be used instead of MII 230. The data interface may include a transmission channel and a reception channel, and each of the channels may have independent clock, data, and control signals. The management interface may be configured as a two-signal interface, one for the clock and the other for the data.

The PHY layer unit 210 may include a PHY layer interface unit 211, a PHY layer processor 212 and a PHY layer memory 213 and the like. The configuration of the PHY layer unit 210 is not limited thereto, and the PHY layer unit 210 may be configured in various ways. The PHY layer interface unit 211 may transmit signals received from the controller unit 220 to the PHY layer processor 212 and may transmit signals received from the PHY layer processor 212 to the controller unit 220. [ PHY layer processor 212 may control the operation of PHY layer interface unit 211 and PHY layer memory 213, respectively. The PHY layer processor 212 may perform modulation of the signal to be transmitted or demodulation of the received signal. The PHY layer processor 212 may control the PHY layer memory 213 to input or output a signal. The PHY layer memory 213 can store the received signal and output the stored signal upon request of the PHY layer processor 212. [

The controller unit 220 may perform monitoring and control for the PHY layer unit 210 via the MII 230. The controller unit 220 may include a controller interface unit 221, a controller processor 222, a main memory 223, an auxiliary memory 224, and the like. The configuration of the controller unit 220 is not limited thereto, and the controller unit 220 can be configured in various ways. The controller interface unit 221 can receive signals from the PHY layer unit 210 (i.e., the PHY layer interface unit 211) or an upper layer (not shown) and send the received signals to the controller processor 222 And may transmit signals received from the controller processor 222 to the PHY layer unit 210 or higher layer. The controller processor 222 may further include independent memory control logic or integrated memory control logic for controlling the controller interface unit 221, the main memory 223 and the auxiliary memory 224. The memory control logic may be included in the main memory 223 and the auxiliary memory 224, or may be included in the controller processor 222 and implemented.

Each of the main memory 223 and the auxiliary memory 224 may store the signal processed by the controller processor 222 and output the stored signal at the request of the controller processor 222. [ The main memory 223 may mean a volatile memory (e.g., random access memory (RAM), etc.) that temporarily stores data necessary for the operation of the controller processor 222. [ The auxiliary memory 224 includes an operating system code (e.g., a kernel and a device driver) and an application program code for performing functions of the controller processor 220 May be stored in the nonvolatile memory. A flash memory having a high processing speed can be used as a nonvolatile memory or a hard disk drive (HDD), a compact disc-read only memory (CD-ROM), etc. for storing a large amount of data Can be used. Controller processor 222 may typically be comprised of logic circuitry including at least one processing core. As the controller processor 222, an ARM (Advanced RISC Machines Ltd.) series core, an atom series core, or the like may be used.

Hereinafter, a method performed in a communication node belonging to a vehicle network and a corresponding counterpart communication node will be described. Hereinafter, even when a method (e.g., transmission or reception of a signal) to be performed at the first communication node is described, the corresponding second communication node can perform a method corresponding to the method performed at the first communication node For example, receiving or transmitting a signal). That is, when the operation of the first communication node is described, the corresponding second communication node can perform an operation corresponding to the operation of the first communication node. Conversely, when the operation of the second communication node is described, the corresponding first communication node can perform the operation corresponding to the operation of the switch.

3 is a conceptual diagram illustrating a vehicle network according to an embodiment of the present invention.

3, a vehicle network according to an embodiment of the present invention includes a diagnostic (e.g., an on-board diagnostic (OBD) device 300), a gateway 310, an end node 1 321, 2 322, end node 3 323, and end node 4 324. The gateway 310 included in the vehicle network may perform the same or similar functions as the gateway shown in FIG. 1 and the end nodes 321, 322, 323, and 324 may be the same or similar to the end node shown in FIG. 1 A similar function can be performed. The gateway 310 and the end nodes 321, 322, 323, and 324 included in the vehicle network may be configured to be the same as or similar to the communication node shown in Fig.

The gateway 310 may be connected to the diagnostic device 300 via port P1 and may be connected to the end node 1 321 through the port P2 and may be connected to the end node 2 322 via the port P3 Can be connected. The end node 1 321 may be connected to the gateway 310 through a port P13. End node 2 322 may be connected to gateway 310 via port P21 and may be connected to end node 3 323 via port P22 and end node 4 324 via port P23, ). End node 4 324 may be connected to end node 2 322 via port P41.

A method of operating a communication node for selective wake-up in accordance with an embodiment of the present invention in a vehicle network as described above can be performed. In particular, a method of operating a communication node for selective wakeup in a vehicle network according to an embodiment of the present invention and other embodiments may be described with reference to FIGS. 4 to 9 below.

4 is a flowchart illustrating a method of operating a communication node for selective wakeup in a vehicle network according to an embodiment of the present invention.

Referring to FIG. 4, a method for operating a communication node for selective wakeup in a vehicle network according to an exemplary embodiment of the present invention may be performed at a first one of a plurality of communication nodes included in a vehicle network. The first communication node may perform the same or similar functions as the gateway shown in Fig. 1 and may be configured the same or similar to the communication node shown in Fig. Referring to FIG. 3, a description related to the connection structure and the port between the plurality of communication nodes described with reference to FIG. 4 may refer to a description related to the connection structure and ports between the diagnostic device, the gateway and the plurality of end nodes.

First, the first communication node may receive a first message requesting an update of software for a second one of the plurality of communication nodes (S410). Here, the first message requesting the update of the software for the second communication node may be received from the OBD device capable of diagnosing a plurality of communication nodes included in the vehicle network. That is, the OBD device may be connected to the first communication node through the first one of the plurality of ports included in the first communication node. For example, the first communication node may be the gateway shown in Fig. 3, and the second communication node may be the end node 3 shown in Fig. Further, the OBD apparatus may be a diagnostic unit connected to the gateway shown in Fig.

Then, the first communication node may set a port for waking up the second communication node based on a path between the first communication node and the second communication node (S420). Specifically, the first communication node establishes a port for wakeup based on an address table including information on a plurality of communication nodes connected through the plurality of ports included in the first communication node . For example, the address table may include a number of a plurality of ports included in the first communication node, a medium access control (MAC) address of a plurality of communication nodes connected through each of the plurality of ports, a virtual LAN identifier (VLAN ID) And a value indicating whether to wake up the plurality of communication nodes connected through the respective ports of the communication network. Specifically, a method of setting a port for wake-up at the first communication node can be described below with reference to Fig.

5 is a flowchart illustrating a method of setting a port for wake-up in a vehicle network according to an embodiment of the present invention.

Referring to FIG. 5, the first communication node can identify the path between the first communication node and the second communication node based on the MAC address of the second communication node in the address table (S421). For example, Can be represented as shown in Table 1 below.

Table 1 may represent the address table of the first communication node. Specifically, Table 1 includes a value indicating a MAC address, a VLAN, and whether or not to wake up a plurality of communication nodes connected through the plurality of ports P1, P2, and P3 included in the first communication node can do. At this time, it can be assumed that the MAC address of the first communication node is 00-10-20-30-40-00. For example, the MAC address of the communication node connected through the port P1 of the first communication node may be 00-10-20-30-30-00, and the MAC address of the communication node connected through the port P2 may be 00-10-20-30-20-00, and the MAC address of the communication node connected through the port P3 is 00-10-20-30-40-01, 00-10-20-30-40- 02 and 00-10-20-30-40-03.

The first communication node can confirm the port number corresponding to the MAC address of the second communication node in the address table as shown in Table 1. [ When the MAC address of the second communication node is 00-10-20-30-40-02, the first communication node transmits the MAC address of the second communication node 00-10-20-30-40-02 in the address table You can see the corresponding port number. Specifically, the first communication node can confirm that the port number corresponding to the MAC address of the second communication node is P3. Accordingly, the first communication node can determine that the second communication node is connected to the third communication node connected through the port P3 among the plurality of ports included in the first communication node. That is, the first communication node can confirm that the path between the first communication node and the second communication node is "the first communication node - the third communication node - the second communication node ".

For example, the third communication node may be the end node 2 shown in FIG. That is, the third communication node may be the end node 2 connected through the port P3 of the plurality of ports included in the gateway of FIG. Accordingly, the second communication node may be the end node 3 connected through the port P22 of the end node 2 of Fig. Therefore, the "first communication node - third communication node - second communication node" identified in step S421 may mean "gateway - end node 2 - end node 3" which is a path that can be identified in FIG.

Then, the first communication node can identify the first port corresponding to the MAC address of the second communication node among the plurality of ports included in the first communication node (S422). That is, as described in step S421, the first communication node transmits the port P3 of the port number P3 corresponding to the MAC address of the second communication node 00-10-20-30-40-02 to the first port Can be confirmed.

Thereafter, the first communication node may set the identified first port as a port for waking up the second communication node (S423). Specifically, the first communication node may set a value indicating whether to wake up the first port to indicate that the second communication node is the subject of wake-up. For example, a value indicating whether to wake up included in the address table of the first communication node can be set as shown in Table 2 below.

Table 2 may represent an address table in which a port for wake-up wake-up for the second communication node is set. Specifically, as shown in Table 2, it can be seen that a value indicating whether or not the port P3 of the port number P3 is subject to wake-up is set from 0 to 1. That is, when the value indicating whether or not the port P3 is subject to wakeup is 0, the port P3 may mean that the port P3 is not the subject of wakeup. On the other hand, when the value indicating whether the port P3 is subject to wakeup is 1, the port P3 may mean that it corresponds to the object of wake-up.

At this time, the first communication node may generate a message including an indicator indicating the setting of the port for waking up the second communication node. The first communication node may then send a message to the third communication node connected to the first communication node via port P3 indicating the setting of the port for waking up the second communication node. That is, the first communication node may send a message indicating the setting of the port for waking up the second communication node to at least one communication node included in the path between the first communication node and the second communication node.

Accordingly, the third communication node can receive a message from the first communication node indicating the setting of the port for waking up the second communication node. Thereafter, the third communication node can confirm the indicator indicating the setting of the port for waking up the second communication node included in the message, and can set the port for waking up the second communication node. The specific method of setting the port for waking up the second communication node at the third communication node may be the same as the method for setting the port for waking up the second communication node at the first communication node.

Specifically, the third communication node can identify the port corresponding to the MAC address of the second communication node in the address table included in the third communication node, and set the checked port as the port for waking up the second communication node . That is, the third communication node sets a port for waking up the second communication node by setting a value indicating whether or not to wake up the port corresponding to the MAC address of the second communication node in the address table of the third communication node Can be set. For example, the address table of the third communication node can be represented as shown in Table 3 below.

Table 3 shows the address table of the third communication node. The third communication node can have the address table as shown in Table 3 and confirm the port number corresponding to the MAC address of the second communication node in the address table. That is, the second communication node can identify the port P22 of the port number P22 corresponding to the MAC address of the second communication node 00-10-02-30-40-02 in the address table, P22) as a port for waking up the second communication node. Accordingly, the address table of the third communication node in which the port for wake-up of the second communication node is set can be expressed as shown in Table 4 below.

Table 4 shows the address table of the third communication node in which the port for waking up the second communication node is set. That is, the third communication node can set a value indicating from 0 to 1 indicating whether or not the port (P22) of the port number P22 is subject to wakeup in the address table. A port for waking up the second communication node in the vehicle network according to an embodiment of the present invention can be established through the method as described above.

Referring again to FIG. 4, the first communication node may transmit a second message indicating a wake-up of the second communication node through the established port (S430). Specifically, the first communication node may generate a second message including an indicator that instructs the second communication node to wake up. Here, the second message may further include a MAC address for the second communication node. Then, the first communication node can transmit the second message through the port P3, which is the port set in step S423.

Thereby, the third communication node connected through the port P3 of the first communication node can receive the second message from the first communication node indicating the wake-up of the second communication node. At this time, the third communication node can receive a second message indicating a wake-up of the second communication node through the port P21. Thereafter, the third communication node can confirm the indicator indicating the wake-up of the second communication node in the message, and can generate the message including the indicator indicating the wake-up of the second communication node. Thereafter, the third communication node may transmit a message instructing the wake-up of the second communication node through the port P22.

Thus, the second communication node may receive a message from the third communication node instructing the second communication node to wake up. At this time, since the second communication node is connected to the third communication node through the port 31, it can receive the message indicating the wake-up of the second communication node. Thereafter, the second communication node can confirm the indicator indicating the wake-up of the second communication node in the message indicating the wake-up of the second communication node, and can transition the state of the second communication node to wake-up.

The first communication node may then provide an update of the software for the second communication node based on the path corresponding to the port set for wake-up of the second communication node (S440). Specifically, a method of providing software updates to the second communication node at the first communication node may be described below with reference to FIG.

6 is a flow diagram illustrating a method for providing software updates in a vehicle network in accordance with one embodiment of the present invention.

Referring to FIG. 6, the first communication node may acquire software for updating the software of the second communication node in the memory of the first communication node (S441). For example, the first communication node can identify an identifier of software that is requested to be updated in the first message received from the OBD device, and retrieve software corresponding to the identified identifier from the memory of the first communication node . The first communication node may then obtain the retrieved software of the first communication node from the memory of the first communication node.

Here, acquiring the software for updating the software of the second communication node in the memory of the first communication node may mean that the software for updating the software of the second communication node is pre-stored in the memory of the first communication node have. On the other hand, if the software for updating the software of the second communication node is not pre-stored in the memory of the first communication node, the first communication node may request software for updating the software of the second communication node from the diagnostic device.

Thereafter, the first communication node may transmit a third message including the acquired software to the second communication node through the set port (S442). Specifically, the first communication node may generate a third message including software for updating the software of the second communication node. The first communication node may then transmit the third message over the port set for wake-up of the second communication node.

That is, the first communication node may transmit the third message to the third communication node via port P3. Accordingly, the third communication node can receive the third message from the first communication node via the port P21. Thereafter, the third communication node may transmit a third message to the second communication node via port P22. Thus, the second communication node can receive a third message from the third communication node via port P31. In this way, the first communication node can provide software updates to the second communication node based on the path corresponding to the port set for wake-up of the second communication node.

On the other hand, the second communication node may obtain software for updating the software of the second communication node in the third message received from the third communication node. The second communication node may then update the software of the second communication node based on the acquired software. Thereafter, the second communication node may generate a fourth message indicating that the software of the second communication node has been updated. The second communication node may then send a fourth message to the third communication node via port 31. [ Thus, the third communication node can receive a fourth message from the second communication node via port P22. The third communication node may then transmit the fourth message to the first communication node via port P21.

Thus, the first communication node can receive the fourth message from the third communication node via port P3. As such, when the first communication node receives the fourth message indicating that the software of the second communication node has been updated via the port set for wake-up of the second communication node, the first communication node performs the wakeup of the second communication node It can be released from the port set for it. Specifically, the first communication node can set a value indicating whether the wake-up of the port corresponding to the MAC address of the second communication node is subject to wake-up in the address table of the first communication node, as shown in Table 5 below.

That is, the first communication node can set a value from 1 to 0 indicating whether the port P3 of the port number P3 corresponding to the MAC address of the second communication node is subject to wake-up. At this time, the first communication node may generate a message instructing the third communication node to release the port set for wake-up of the second communication node, and may transmit the generated message to the third communication node. Accordingly, the third communication node can release the port set for wake-up of the second communication node from the first communication node. The specific method of releasing the port set for wake-up of the second communication node at the third communication node may be the same as the method of releasing the port set for waking up the second communication node at the first communication node.

On the other hand, in the vehicle network according to the embodiment of the present invention, when the time for performing the update of the software for the second communication node is preset, the first communication node updates the software for the second communication node Can be performed. That is, in the vehicle network according to an embodiment of the present invention, the first communication node may reserve time for updating the software for the second communication node.

For example, in the vehicle network, the first communication node can confirm whether or not the time for performing the update of the software for the second communication node is set. The first communication node may then operate the timer included in the first communication node if the time for performing software update for the second communication node is predetermined. Thereafter, the first communication node may monitor through the timer that is operated, whether a predetermined time has elapsed to perform an update of the software for the second communication node.

Thereafter, the first communication node updates software previously stored in the memory of the first communication node to update the software for the second communication node, if a preset time has elapsed to perform software update for the second communication node Can be obtained. The first communication node may then provide an update of the software for the second communication node based on the acquired software. Specifically, the method of providing software updates to the second communication node at the first communication node may be the same as that described with reference to Figures 3-6.

7 is a flowchart illustrating a method of operating a communication node for selective wakeup in a vehicle network according to another embodiment of the present invention.

Referring to FIG. 7, a method for operating a communication node for selective wakeup in a vehicle network according to another embodiment of the present invention may be performed at a first one of a plurality of communication nodes included in a vehicle network. The first communication node may perform the same or similar functions as the gateway shown in Fig. 1 and may be configured the same or similar to the communication node shown in Fig. Referring to FIG. 3, a description related to the connection structure and the port between the plurality of communication nodes described with reference to FIG. 7 may refer to a description related to the connection structure and ports between the diagnostic device, the gateway and the plurality of end nodes.

First, the first communication node may receive a first message requesting a diagnostic for a second one of the plurality of communication nodes (S710). Here, the first message requesting the diagnosis of the second communication node may be received from the OBD device capable of diagnosing a plurality of communication nodes included in the vehicle network. That is, the OBD device may be connected to the first communication node through the first one of the plurality of ports included in the first communication node. For example, the first communication node may be the gateway shown in Fig. 3, and the second communication node may be the end node 3 shown in Fig. Further, the OBD apparatus may be a diagnostic unit connected to the gateway shown in Fig.

Thereafter, the first communication node may establish a port for waking up the second communication node based on a path between the first communication node and the second communication node (S720). Specifically, the first communication node can set a port for wakeup based on an address table including information on a plurality of communication nodes connected through each of a plurality of ports included in the first communication node. For example, the address table may include a number of ports included in the first communication node, a MAC address of a plurality of communication nodes connected through each of the plurality of ports, a VLAN ID, and a plurality of communications And may include a value indicating whether to wake up the nodes. Specifically, a method of setting a port for wake-up at the first communication node can be described below with reference to Fig.

8 is a flowchart illustrating a method of setting a port for wake-up in a vehicle network according to another embodiment of the present invention.

Referring to FIG. 8, the first communication node can confirm the path between the first communication node and the second communication node based on the MAC address of the second communication node in the address table (S721). In the first communication node, The specific method of confirming the path between the node and the second communication node may be the same as the method of confirming the path between the first communication node and the second communication node described in step S421 of FIG.

Thereafter, the first communication node can identify the first port corresponding to the MAC address of the second communication node among the plurality of ports included in the first communication node (S722). That is, as described in step S421 of FIG. 4, the first communication node transmits the port P3 of the port number P3 corresponding to the MAC address of the second communication node 00-10-20-30-40-02 1 port.

Thereafter, the first communication node may set the identified first port as a port for waking up the second communication node (S723). Specifically, the first communication node may set a value indicating whether to wake up the first port to indicate that the second communication node is the subject of wake-up. The specific method of setting the port for waking up the second communication node at the first communication node may be the same as the method for setting the port for waking up the second communication node described in step S423 of Fig.

Referring again to FIG. 7, the first communication node may transmit a second message indicating a wake-up of the second communication node through the established port (S730). Specifically, the first communication node may generate a second message including an indicator that instructs the second communication node to wake up. Here, the second message may further include a MAC address for the second communication node. Then, the first communication node can transmit the second message through the port P3, which is the port set in step S723. The concrete method of transmitting the second message instructing the wake-up of the second communication node at the first communication node includes a method of transmitting the second message instructing the wake-up of the second communication node described in step S430 of Fig. 4 Can be the same.

Thereafter, the first communication node may perform a diagnosis for the second communication node based on the path corresponding to the port set for waking up the second communication node (S740). Specifically, a method of performing diagnosis for the second communication node at the first communication node can be described with reference to FIG. 6 below.

9 is a flow chart illustrating a method of performing diagnostics in a vehicle network according to another embodiment of the present invention.

Referring to FIG. 9, the first communication node may transmit a third message to the second communication node through a port, which directs the execution of the diagnostic operation indicated by the first message (S741). Specifically, the first communication node can confirm the diagnostic operation indicated by the first message received from the OBD device. Then, the first communication node can generate a third message including an indicator for instructing a diagnostic operation. The first communication node may then transmit the third message to the third communication node via the port (P3) of the first communication node connected to the third communication node.

Accordingly, the third communication node can receive the third message from the first communication node through the port P21 connected to the first communication node, which directs the diagnostic operation. The third communication node may then send a third message to the second communication node via port P22 connected to the second communication node.

Accordingly, the second communication node can receive the third message through the port P31 connected to the third communication node. Thereafter, the second communication node can confirm the indicator indicating the diagnostic operation in the third message, and can perform the diagnostic operation corresponding to the identified indicator. Thereafter, the second communication node may generate a fourth message including information on the result of performing the diagnostic operation, and may transmit the generated fourth message to the third communication node through the port P31. Accordingly, the third communication node can receive the fourth message including information on the result of performing the diagnostic operation from the second communication node via the port P22. The third communication node may then transmit a fourth message to the first communication node via port P21.

Accordingly, the first communication node can receive the fourth message including the information on the result of performing the diagnostic operation from the second communication node (S742). That is, the first communication node may receive the fourth message from the third communication node through the port P21 connected to the third communication node. For example, the information on the result of the diagnostic operation may indicate whether or not the diagnostic operation is performed and whether a response message is transmitted to the message indicating the diagnostic operation.

Thereafter, the first communication node may perform a diagnosis for the second communication node based on the result of performing the diagnostic operation (S743). The diagnosis for the second communication node performed at the first communication node may indicate a failure of the second communication node. For example, if the information on the result of the diagnostic operation included in the fourth message includes information that the diagnostic operation has not been performed, or that the response message to the message for instructing the diagnostic operation is not received Information, the first communication node may determine that the second communication node is in a failed state. On the other hand, if information on the result of the diagnostic operation included in the fourth message includes information indicating that the diagnostic operation has been normally performed, or includes information indicating that a response message to the message indicating the diagnostic operation has been received, The first communication node may determine that the second communication node is in a normal state. In this way, the first communication node in the vehicle network can perform a diagnostic operation for the second communication node.

On the other hand, if the second communication node has normally performed the diagnostic operation, the second communication node can generate the fifth message indicating that the diagnosis is completed. The second communication node may then send a fifth message to the third communication node via port P31 connected to the third communication node. Accordingly, the third communication node can receive the fifth message from the second communication node via the port P22 connected to the second communication node. The third communication node may then send a fifth message to the first communication node via port P21 connected to the first communication node.

Accordingly, the first communication node can receive the fifth message from the third communication node through the port P3 connected to the third communication node, which indicates that the execution of the diagnosis is completed. In this manner, when the first communication node receives the fifth message indicating that the diagnosis for the second communication node is completed through the port set for wake-up of the second communication node, It can be released from the port set for wakeup. Specifically, the method of releasing the port set at the first communication node to the port set for wake-up of the second communication node is the same as the method of releasing the set port described with reference to Fig. 4 from the port set for wake- May be the same as the method of FIG.

In this way, a method for operating a communication node for selective wake-up in a vehicle network according to an embodiment of the present invention includes a communication node connected through a port requiring wake-up among a plurality of ports included in the communication node And can be selectively woken up.

The methods according to the present invention can be implemented in the form of program instructions that can be executed through various computer means and recorded on a computer readable medium. The computer readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions recorded on the computer readable medium may be those specially designed and constructed for the present invention or may be available to those skilled in the computer software.

Examples of computer readable media include hardware devices that are specially configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those generated by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate with at least one software module to perform the operations of the present invention, and vice versa.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims. It will be possible.

Claims (20)

A method of operating a first one of a plurality of communication nodes included in an Ethernet based vehicle network,
Receiving a first message requesting an update of software for a second one of the plurality of communication nodes;
Setting a port for wake-up of the second communication node based on a path between the first communication node and the second communication node;
Transmitting a second message indicating a wake-up of the second communication node via the established port; And
And providing an update of the software to the second communication node based on the path corresponding to the set port. The method according to claim 1,
Wherein the first message comprises:
Wherein the first communication node is received from an on-board diagnostic (OBD) device capable of diagnosing a plurality of communication nodes included in the vehicle network. The method according to claim 1,
Wherein the setting of the port for wake-
Wherein the first communication node sets a port for wakeup based on an address table including information on a plurality of communication nodes connected through each of a plurality of ports included in the first communication node 1 method of operating a communication node. The method of claim 3,
The address table includes:
A number of ports included in the first communication node, a medium access control (MAC) address of a plurality of communication nodes connected through the plurality of ports, a VLAN ID (virtual LAN identifier) And a value indicating whether to wake up the plurality of communication nodes connected through the first communication node. The method of claim 3,
Wherein the setting of the port for wake-
Confirming a path between the first communication node and the second communication node based on the MAC address of the second communication node in the address table;
Identifying a first port corresponding to a MAC address of the second communication node among a plurality of ports included in the first communication node; And
And setting the identified first port as a port for wake-up of the second communication node. The method of claim 5,
Wherein the setting of the port for wake-
Wherein the second communication node sets a value indicating whether to wake up the first port so that the second communication node indicates that the second communication node is an object of wake-up. The method according to claim 1,
The step of providing an update of the software,
Obtaining software for updating software of the second communication node in a memory of the first communication node; And
And transmitting a third message including the obtained software to the second communication node via the established port. The method according to claim 1,
The method of claim 1,
Further comprising the step of releasing the set port from the port for waking up the second communication node when receiving a fourth message indicating that the software of the second communication node has been updated via the set port, The method comprising the steps of: A method of operating a first one of a plurality of communication nodes included in an Ethernet based vehicle network,
Receiving a first message requesting a diagnostic for a second one of the plurality of communication nodes;
Setting a port for wake-up of the second communication node based on a path between the first communication node and the second communication node;
Transmitting a second message indicating a wake-up of the second communication node via the established port; And
And performing a diagnosis for the second communication node based on the path corresponding to the set port. The method of claim 9,
Wherein the first message comprises:
Wherein the first communication node is received from an on-board diagnostic (OBD) device capable of diagnosing a plurality of communication nodes included in the vehicle network. The method of claim 9,
Wherein the setting of the port for wake-
Wherein the first communication node sets the port for wakeup based on an address table including information on a plurality of communication nodes connected through each of the plurality of ports included in the first communication node 1 method of operating a communication node. The method of claim 11,
The address table includes:
A number of ports included in the first communication node, a medium access control (MAC) address of a plurality of communication nodes connected through the plurality of ports, a VLAN ID (virtual LAN identifier) And a value indicating whether to wake up the plurality of communication nodes connected through the first communication node. The method of claim 11,
Wherein the setting of the port for wake-
Confirming a path between the first communication node and the second communication node based on the MAC address of the second communication node in the address table;
Identifying a first port corresponding to a MAC address of the second communication node among a plurality of ports included in the first communication node; And
And setting the identified first port as a port for wake-up of the second communication node. 14. The method of claim 13,
Wherein the setting of the port for wake-
Wherein the second communication node sets a value indicating whether to wake up the first port so that the second communication node indicates that the second communication node is an object of wake-up. The method of claim 9,
Wherein performing the diagnostics for the second communication node comprises:
Transmitting a third message indicating execution of a diagnostic operation indicated by the first message to the second communication node through the set port;
Receiving a fourth message from the second communication node, the fourth message including information about a result of performing the diagnostic operation; And
And performing a diagnosis on the second communication node based on a result of performing the diagnosis operation. The method of claim 9,
The method of claim 1,
Further comprising the step of releasing the set port from the port for waking up the second communication node when receiving a fifth message indicating that the diagnosis for the second communication node is completed through the set port Lt; RTI ID = 0.0 > 1, < / RTI > A first one of a plurality of communication nodes included in an Ethernet-based vehicle network,
A processor; And
Wherein at least one instruction executed through the processor includes a memory,
Wherein the at least one instruction comprises:
Receiving a first message from an on-board diagnostic (OBD) device included in the vehicle network requesting an update of software to a second one of the plurality of communication nodes;
Setting a port for wakeup based on an address table including information on a plurality of communication nodes connected through each of a plurality of ports included in the first communication node;
Sending a second message indicating wake-up of the second communication node via the established port;
Providing an update of the software to the second communication node based on the path corresponding to the established port; And
And to release the set port on the port for wake-up of the second communication node when receiving a fourth message indicating that the software of the second communication node has been updated via the set port. 18. The method of claim 17,
The address table includes:
A number of ports included in the first communication node, a medium access control (MAC) address of a plurality of communication nodes connected through the plurality of ports, a VLAN ID (virtual LAN identifier) And a value indicating whether to wake up the plurality of communication nodes connected through the first communication node. 19. The method of claim 18,
Wherein the at least one instruction comprises:
Confirming a path between the first communication node and the second communication node based on the MAC address of the second communication node in the address table in the step of setting the port for wake-up;
Identify a first port corresponding to a MAC address of the second communication node among a plurality of ports included in the first communication node; And
And to set a value indicative of whether to wake up the first port to indicate that the second communication node is the subject of wake-up. 18. The method of claim 17,
Wherein the at least one instruction comprises:
Obtaining software for updating the software of the second communication node in a memory of the first communication node in the process of providing an update of the software; And
And to transmit a third message including the obtained software to the second communication node via the established port.

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