KR20130093811A - Real-time ethernet network and vehicle - Google Patents

Abstract

A vehicular real-time Ethernet network includes a plurality of local networks, each having a switch and at least two electronic control units (ECUs); And a smart ethernet switch for relaying global packets from the local network, wherein the smart ethernet switch comprises a frame buffer for storing global packets from the plurality of local networks, after all of the global packets have been transmitted. A cycle boundary packet indicating that one communication period is completed is transmitted to all of the plurality of local networks.

Description

Real-time ethernet network and vehicle

The present invention relates to communications in a vehicle, and more particularly, to a real-time Ethernet network for a vehicle and a vehicle.

In the 2000s, many advanced electronic equipment began to be included in vehicles. These electronic devices are included for the convenience and safety of the user. However, the electronic control system (X-by-Wire), which is essential for driving, such as electric power steering (EPS) and electronic brake system (EBS), is provided. It is also used for. By implementing X-by-Wire, various mechanical connections can be replaced by lightweight wires, greatly reducing the overall vehicle weight. In addition, since various vehicle controls are performed electronically, the vehicle control can be changed quickly according to a pre-implemented algorithm instead of relying only on user's operation, thereby greatly improving efficiency and stability.

Due to these various advantages, much research and development on the X-by-Wire system for vehicles has been made. In particular, the most important element in the X-by-Wire system is an efficient network structure that can integrate all electronic devices. Until now, vehicle networks have been actively developed in the industry, and as a result, vehicle network standards such as Local Interconnect Network (LIN), Controller Area Network (CAN), and FlexRay have been defined and commercialized. However, each vehicle network has its own disadvantages, and in common, does not provide enough speed to integrate all the networks in the vehicle into one. As a result, a large amount of communication wiring is complicatedly arranged in the vehicle, which degrades performance and safety. In addition, the existing network is not used in any fields other than the vehicle or industrial machinery, there is a disadvantage that the equipment related to the technology is provided exclusively by a small number. As a result, the technologies and equipment associated with these networks are expensive and difficult to apply.

One object of the present invention for solving the above problems is to provide a real-time Ethernet network for a vehicle that can apply Ethernet communication in real time.

One object of the present invention is to provide a vehicle in which a real-time Ethernet network is supported.

One object of the present invention is to provide a method of operating a smart Ethernet switch of a vehicle supported by a real-time Ethernet network.

An object of the present invention to provide an Ethernet communication method of a vehicle supported by a real-time Ethernet network.

In order to achieve the above object of the present invention, a vehicle real-time Ethernet network according to an embodiment of the present invention comprises: a plurality of local networks each having a switch and at least two electronic control units (ECUs); And a smart ethernet switch for relaying global packets from the local network, wherein the smart ethernet switch comprises a frame buffer for storing global packets from the plurality of local networks, after all of the global packets have been transmitted. A cycle boundary packet indicating that one communication period is completed is transmitted to all of the plurality of local networks.

In an embodiment, the vehicular real-time Ethernet network may include one of the at least two electronic controllers transmitting a local packet to the corresponding switch, and another of the at least two electronic controllers transmits a global packet to the corresponding switch. At least one external communication phase in which the corresponding switch transmits the global packet to the smart ethernet switch, and at least one external signal in which the smart ethernet switch transmits the global packet to another local network. It can operate in the one communication period consisting of a communication phase.

In an embodiment, the at least one external communication phase can be repeated up to the number -1 of the plurality of local networks within the one communication period.

In an embodiment, each of the at least two electronic controllers included in the one local network may transmit different packets in a subsequent communication period that is continuous with the one communication period.

The smart Ethernet switch may transmit the cycle boundary packet to the plurality of local networks at the end of the at least one external communication phase.

In example embodiments, each of the at least two electronic controllers included in each of the plurality of local networks may include a counter for counting the cycle boundary packet.

A vehicle supporting a real-time Ethernet network according to an embodiment of the present invention for achieving the above object of the present invention includes a main body; A plurality of local networks distributed and distributed over the body, each having a switch and at least two electronic control units (ECUs); And a smart ethernet switch for relaying global packets from the local network, wherein the smart ethernet switch comprises a frame buffer for storing global packets from the plurality of local networks, after all of the global packets have been transmitted. A cycle boundary packet is sent to all of the plurality of local networks informing that one cycle is complete.

In order to achieve the above object of the present invention, a method of operating a smart Ethernet switch of a vehicle supported by a real-time Ethernet network according to an embodiment of the present invention includes a switch and at least two electronic control units (ECUs), respectively. Receiving a global packet received from a plurality of local networks having a network in a frame buffer of a smart Ethernet switch; Determining whether the number of global packets to be transmitted to a plurality of local networks among the received global packets is zero; When the number of global packets to be transmitted is zero, transmitting, by the smart Ethernet switch, a cycle boundary packet indicating that one communication period is completed to the plurality of local networks; And if the number of global packets to be transmitted is not zero, transmitting the global packets to corresponding local networks.

In an embodiment, said one communication period is such that one of said at least two electronic controls sends a local packet to said corresponding switch, and another one of said at least two electronic controls controls a global packet on said corresponding switch. At least one external communication phase in which the corresponding packet transmits the global packet to the smart ethernet switch and the smart ethernet switch transmits the global packet to an electronic controller included in another local network. It may consist of a communication phase.

In an embodiment, the at least one external communication phase can be repeated up to the number -1 of the plurality of local networks within the one communication period.

In an embodiment, each of the at least two electronic controllers included in the one local network may transmit different packets in a subsequent communication period that is continuous with the one communication period.

Ethernet communication method of a vehicle supported by a real-time Ethernet network according to an embodiment of the present invention for achieving the above object of the present invention comprises a switch and at least two electronic control unit (ECU) Determining, by each switch, a type of packet transmitted from the at least two electronic controllers in each of a plurality of local networks; Transmitting a local packet to a smart Ethernet switch connecting the plurality of local networks within each local network according to the type of the packet determined by each switch; Determining whether the transmission of the global packet is completed in the smart Ethernet switch; And when the transmission of the global packet is completed, transmitting a cycle boundary packet to the plurality of local networks indicating that one communication period is completed.

In an embodiment, the Ethernet communication method of a vehicle supported by a real-time Ethernet network may further include counting the cycle boundary packet in each of the at least two electronic controllers included in each of the plurality of local networks. .

Therefore, according to embodiments of the present invention, by introducing a smart Ethernet switch, all the electronic controllers in the vehicle can be managed at high speed in real time through the Ethernet, and the use of Ethernet can solve the complex and heavy wiring problem of the vehicle.

1 is a table showing the characteristics of three conventional vehicle networks.
2 is a block diagram illustrating a vehicle real-time Ethernet network according to an embodiment of the present invention.
3 shows a communication cycle of the vehicular real-time Ethernet network of FIG.
4 is a block diagram illustrating an electronic controller according to an exemplary embodiment of the present invention.
5 is a block diagram illustrating a smart Ethernet switch according to an embodiment of the present invention.
6 to 8 illustrate the operation of a vehicular real-time Ethernet network according to an embodiment of the present invention.
9 is a flowchart illustrating a method of operating a smart Ethernet switch of a vehicle supported by a real-time Ethernet network according to an embodiment of the present invention.
10 is a flowchart illustrating an Ethernet communication method of a vehicle supported by a real-time Ethernet network according to an embodiment of the present invention.
11 is a block diagram illustrating a vehicle supported by a real-time Ethernet network according to an embodiment of the present invention.

For the embodiments of the invention disclosed herein, specific structural and functional descriptions are set forth for the purpose of describing an embodiment of the invention only, and it is to be understood that the embodiments of the invention may be practiced in various forms, The present invention should not be construed as limited to the embodiments described in Figs.

As the inventive concept allows for various changes and numerous modifications, particular embodiments will be illustrated in the drawings and described in detail in the text. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover 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 may be used for the purpose of distinguishing one component from another component. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may be present in between. Should be. 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. Other expressions that describe the relationship between components, such as "between" and "between" or "neighboring to" and "directly adjacent to" should be interpreted as well.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present application, the terms "comprise", "having", and the like are intended to specify the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, , Steps, operations, components, parts, or combinations thereof, as a matter of principle.

Unless otherwise defined, 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 construed as meaning consistent with meaning in the context of the relevant art and are not to be construed as ideal or overly formal in meaning unless expressly defined in the present application .

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

Prior to describing the present invention, the characteristics of three existing vehicular networks will be described.

1 is a table showing the characteristics of three conventional vehicle networks.

The LIN mediates communication between multiple ECUs by distributing tokens to slave ECUs, which represent the right of the electronic control unit (ECU), which acts as the network master, to occupy the network and begin transmitting. This method has the advantage that the control is simple and all ECUs have the opportunity to transmit data fairly, but the arbitration process is inefficient and there is no distinction between devices that need to transmit data frequently and devices that do not. There are disadvantages.

CAN takes all ECUs connected to one network bus and accesses the network channel as soon as each device wants without any special device for arbitration. When accessing a channel, each ECU transmits a predetermined priority number first. A collision occurs when two or more ECUs access a channel at the same time. At this time, since the high priority number (1) is overwritten by the low priority number (0), the low priority ECU can detect collision and yield the channel (CSMA / BA). This method is more efficient than LIN in that it is simple and considers priority among ECUs, but in the worst case, low priority ECUs have a starvation phenomenon that does not give them the opportunity to occupy the channel forever. .

Finally, FlexRay divides each repeated communication cycle into a static slot and a dynamic slot. In the static slot, as in LIN, ECUs occupy channels according to a predetermined schedule. In dynamic slots, on the other hand, as in CAN, ECUs transmit data competitively according to priority. By defining these various elements, FlexRay is designed to take advantage of both LIN and CAN described above. However, the FlexRay standard defines distributed time synchronization to ensure that all ECUs on the network occupy a channel for a fixed amount of time. This is a very complex process that is difficult to implement. In addition, FlexRay is rarely applied to actual vehicles because the protocol itself is complicated and related equipment is not widely used.

2 is a block diagram illustrating a vehicle real-time Ethernet network according to an embodiment of the present invention.

The proposed vehicle network is based on Ethernet, the most widely used network in the world. When developing a vehicle network using Ethernet, the communication speed can be much faster than the existing vehicle network, and research and development are conducted at a low cost and time by using commercially developed commercial equipment (Ethernet communication chip, cable, hub, etc.). There is an advantage to proceed with development. However, when communicating at 100 Mbps or more, there is a problem in that a simple topology of connecting various ECU devices such as CAN to one bus line cannot be realized. This is because, when communicating at high speed, signal interference is greater than at low speed as in CAN. To solve this problem, Ethernet switch equipment must be connected between ECUs, and latency caused by switch equipment is another problem.

Referring to FIG. 2, a vehicular real-time Ethernet network 10 according to an embodiment of the present invention may include a plurality of local networks 210, 220, 230, and 240 and a smart Ethernet switch 100. .

The local network 210 may include a switch (or switch 211) and at least two electronic control units (ECUs) 212, 213, 214. The local network 220 may include a switch 221 and at least two electronic controls 222, 223 and 224. The local network 230 may include a switch 231 and at least two electronic controls 232 and 233. 234. The local network 240 may include a switch 241 and at least two electronic controls 242, 243 and 244. The electronic controls 212, 213 and 214 The switch 211 may communicate with each other, and the switch 211 and the smart Ethernet switch 100 may communicate with electronic controls included in other local networks 220, 230, and 240. Fields 222, 223, and 224 can communicate with each other through a switch 221, and are included in other local networks 210, 230, and 240 through the switch 221 and the smart Ethernet switch 100. Electronic controls 232, 233, and 234 communicate with each other via a switch 231. The electronic controllers 242, 243, and 244 may communicate with electronic controllers included in other local networks 210, 220, and 240 through the switch 231 and the smart Ethernet switch 100. The switch 241 may communicate with each other, and the switch 241 and the smart Ethernet switch 100 may communicate with electronic controls included in other local networks 210, 220, and 230. In the real-time Ethernet network 10, each of the plurality of local networks 210, 220, 230, and 240 communicates with each other through local packets, and communicates with the outside of each of the plurality of local networks 210, 220, 230, and 240. Can communicate via global packets.

The smart Ethernet switch 100 may relay global packets from the plurality of local networks 210, 220, 230, and 240, and global packets from the plurality of local networks 210, 220, 230, and 240 may be relayed. After all are transmitted, a cycle boundary packet CB indicating that one communication period is completed may be transmitted to all of the plurality of local networks 210, 220, 230, and 240.

3 shows a communication cycle of the vehicular real-time Ethernet network of FIG.

Referring to FIG. 3, the vehicle real-time Ethernet network 20 of FIG. 2 is a switch in which one of at least two electronic controllers included in each of the plurality of local networks 210, 220, 230, and 240 corresponds to a global packet. (For example, 211), another electronic control unit transmits a local packet to the switch 211, and a corresponding switch 211 transmits the global packet to the smart Ethernet switch 100. (I) and the smart Ethernet switch 100 may operate in one communication cycle composed of at least one external communication phase E for transmitting the global packet to a destination electronic controller through a switch of a destination local network. Here, at least one external communication phase E included in one communication period may be repeated as many as -1 of the plurality of local networks 210, 220, 230, and 240. In FIG. 2, since the number of local networks 210, 220, 230, and 240 is four, at least one external communication phase E may be repeated by a maximum of three. Also, at the end of at least one external communication phase E, the smart Ethernet switch 100 may transmit a cycle boundary packet CB to each of the plurality of local networks 210, 220, 230, and 240.

4 is a block diagram illustrating an electronic controller according to an exemplary embodiment of the present invention.

5 is a block diagram illustrating a smart Ethernet switch according to an embodiment of the present invention.

4 and 5, the electronic controller 212 includes a counter 2121 therein and counts a cycle boundary packet CB transmitted from the smart Ethernet switch 100 so that the current communication cycle is a few cycles. I can understand it. In addition, the smart Ethernet switch 100 may include a frame buffer 110 to store global packets GP1, GP2, and GP3 from some of the plurality of local networks 210, 220, 230, and 240. have.

6 to 8 illustrate the operation of a vehicular real-time Ethernet network according to an embodiment of the present invention.

First, referring to FIG. 6, in the internal communication phase I of the current communication cycle, the electronic controller 212 of the local network 210 transmits a local packet (denoted by L) to the switch 211, and the electronic controller 213. ) Sends a global packet (denoted G) to switch 211. In addition, the electronic controller 224 of the local network 220 transmits a local packet (denoted by L) to the switch 221, and the electronic controller 223 transmits a global packet (denoted by G) to the switch 211. . In addition, the electronic control unit 232 of the curl network 230 transmits a local packet (denoted by L) to the switch 231, and the electronic control unit 233 transmits a global packet (denoted by G) to the switch 231. . In addition, the electronic control unit 242 of the local network 240 transmits a local packet (denoted by L) to the switch 241, and the electronic control unit 243 transmits a global packet (denoted by G) to the switch 241. . The electronic controllers included in each of the local networks 210, 220, 230, and 240 in the next communication cycle following the current communication cycle may transmit a packet different from the packet transmitted in the current communication cycle to each switch.

Referring to FIG. 7, in the internal communication phase I, the electronic controller 214 of the local network 210 receives a local packet from the switch 211, and the switch 211 transmits a global packet to the Ethernet smart switch 100. In step 251. The Ethernet smart switch 100 may temporarily store the transmitted global packet in the frame buffer 110. The electronic control unit 222 of the local network 220 receives the local packet from the switch 221, and the switch 221 transmits 252 the global packet to the Ethernet smart switch 100. The Ethernet smart switch 100 may temporarily store the transmitted global packet in the frame buffer 110. The electronic control unit 233 of the local network 230 receives the local packet from the switch 231, and the switch 231 transmits 253 the global packet to the Ethernet smart switch 100. The Ethernet smart switch 100 may temporarily store the transmitted global packet in the frame buffer 110. The electronic control unit 244 of the local network 240 receives the local packet from the switch 241, and the switch 241 transmits 254 the global packet to the Ethernet smart switch 100. The Ethernet smart switch 100 may temporarily store the transmitted global packet in the frame buffer 110.

Referring to FIG. 8, in the external communication phase E subsequent to the internal communication phase I, global packets from the electronic control unit 233 of the local network 230 are transferred from the Ethernet smart switch 100 to the local network 210. Is transmitted to the electronic control unit 212 via the switch 211, and the global packet from the electronic control unit 243 of the local network 240 receives the switch 221 of the local network 220 from the Ethernet smart switch 100. It is transmitted to the electronic control unit 223 via.

6 to 8, when global packets from each of the local networks 210, 220, and 230 are destined for the electronic control unit included in the local network 240, the global packets are transmitted to the frame buffer 110 as shown in FIG. 5. Packets may be stored and sequentially provided to the switch 241 of the local network 240, in which case the external communication phase E may be repeated three times after the internal communication phase I as shown in FIG. Can be. Also, when the global packets stored in the frame buffer 110 are sequentially provided to the switch 241 of the local network 240, the Ethernet smart switch 100 transmits the cycle boundary packet CB to the local networks as shown in FIG. 3. It can be provided to all of the (210, 220, 230, 240) to inform that one communication cycle is completed.

9 is a flowchart illustrating a method of operating a smart Ethernet switch of a vehicle supported by a real-time Ethernet network according to an embodiment of the present invention.

Hereinafter, a method of operating a smart Ethernet switch of a vehicle supported by a real-time Ethernet network according to an embodiment of the present invention will be described with reference to FIGS. 2 to 9.

When one communication cycle is started, the smart Ethernet switch 100 receives global packets from the plurality of local networks 210, 220, 230, and 240 during the internal communication phase of one communication cycle and enters the frame buffer 110. Save (S210). Here, each of the plurality of local networks 210, 220, 230, and 240 includes one switch 211, 212, 213, and 214 and three electronic controllers 212 to 214, 222 to 224, 232 to 234, and 242 to 244). The smart Ethernet switch 100 determines the number of global packets to be transmitted to the plurality of local networks among the global packets stored in the frame buffer 110 (S220). Here, each of the plurality of local networks 210, 220, 230, and 240 must send a global packet to the smart Ethernet switch 100 in a mandatory manner during the internal communication phase. Some packets may be included. If the number of global packets to be transmitted to the plurality of local networks is not zero (NO in S220), the corresponding global packet is transmitted to the corresponding local network during the external communication phase (S230). If the number of global packets to be transmitted to the plurality of local networks is 0 (YES in S220), a cycle boundary packet CB is transmitted to all the local networks 210, 220, 230, and 240 to indicate that one communication period is completed. Transmit (S240).

10 is a flowchart illustrating an Ethernet communication method of a vehicle supported by a real-time Ethernet network according to an embodiment of the present invention.

Hereinafter, an Ethernet communication method of a vehicle supported by a real-time Ethernet network according to an embodiment of the present invention will be described with reference to FIGS. 2 to 8 and 10.

First, a plurality of local networks 210 and 220 each consisting of one switch 211, 212, 213, and 214 and three electronic controllers 212 to 214, 222 to 224, 232 to 234, and 242 to 244. Types of packets transmitted from the at least two electronic controllers 212 to 214, 222 to 224, 232 to 234, and 242 to 244 by the switches 211, 212, 213, and 214, respectively. Determine (S310). According to the determined packet type, each of the switches 211, 212, 213, and 214 transmits a local packet to an electronic control unit within a corresponding local network, and a global packet is transmitted to the local networks 210, 220, 230 according to the determined packet type. , 240 is transmitted to the smart Ethernet switch 100 connected to each other (S320). The smart Ethernet switch 100 determines whether the transmission of the global packet is completed (S330). If the transmission of the global packets is not completed (NO in S330), the process returns to step 320. When the transmission of the global packets is completed (YES in S330), the smart Ethernet switch 100 transmits a cycle boundary packet (CB) indicating that one communication cycle is completed to all the local networks 210, 220, 230, and 240. do. The electronic controllers 212-214, 222-224, 232-234, 242-244 included in each of the local networks 210, 220, 230, and 240 count the transmitted cycle boundary packet CB (S350). ) You can find out the current communication cycle.

11 is a block diagram illustrating a vehicle supported by a real-time Ethernet network according to an embodiment of the present invention.

Referring to FIG. 11, a vehicle supporting a real-time Ethernet network according to an embodiment of the present invention is distributed and distributed in the main body 20 and the main body 20, each of which includes a switch and at least two electronic control units; A plurality of local networks 420, 430, 440, 450 with ECUs and a smart Ethernet switch 410 that relays global packets from the local networks 420, 430, 440, 450. have. Herein, the smart Ethernet switch 410 includes a frame buffer (see FIG. 5) for storing global packets from the plurality of local networks 420, 430, 440, and 450, and after the global packets are all transmitted, The cycle boundary packet CB may be transmitted to all local networks 420, 430, 440, and 450 indicating that one communication period is completed.

Herein, each of the local networks 420, 430, 440, and 450 includes a group of locally adjacent electronic controllers among a plurality of electronic controllers distributed and distributed in the main body 20, and the grouped electronic controllers and the smart Ethernet. The concept includes a switch connecting the switch 410.

As described above, in the embodiments of the present invention, a smart Ethernet switch may be introduced to manage all electronic controllers in a vehicle at high speed in real time through Ethernet, and the use of Ethernet may solve a complicated and heavy wiring problem of the vehicle.

Embodiments of the present invention can be applied to various vehicles including many electronic controls.

While the present invention has been described with reference to the preferred embodiments thereof, it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined in the appended claims. It will be understood.

Claims (14)

A plurality of local networks, each having a switch and at least two electronic control units (ECUs); And
A smart Ethernet switch for relaying global packets from the local network,
The smart Ethernet switch includes a frame buffer for storing global packets from the plurality of local networks, and includes a cycle boundary packet indicating that one communication period is completed after all of the global packets have been transmitted. Automotive real-time Ethernet network for all. The method of claim 1,
In the vehicular real-time Ethernet network, one of the at least two electronic controls transmits a local packet to the corresponding switch, the other of the at least two electronic controls transmits a global packet to the corresponding switch, One internal communication phase for a corresponding switch to transmit the global packet to the smart Ethernet switch, and at least one external communication phase for the smart ethernet switch to transmit the global packet to an electronic controller included in another local network. Vehicle real-time Ethernet network, characterized in that operating in one communication period. The method of claim 2,
And said at least one external communication phase is repeated up to the number -1 of said plurality of local networks within said one communication period. The method of claim 2,
The at least two electronic controllers included in the one local network each transmit a different packet in a next communication period consecutive with the one communication period. The method of claim 2,
And the smart Ethernet switch transmits the cycle boundary packet to the plurality of local networks at the end of the at least one external communication phase. The method of claim 5,
And each of the at least two electronic controllers included in each of the plurality of local networks comprises a counter for counting the cycle boundary packets. A vehicle with a real-time Ethernet network
main body;
A plurality of local networks distributed and distributed over the body, each having a switch and at least two electronic control units (ECUs); And
A smart Ethernet switch for relaying global packets from the local network,
The smart Ethernet switch includes a frame buffer for storing global packets from the plurality of local networks, and includes a cycle boundary packet indicating that one cycle is completed after all of the global packets have been transmitted. A vehicle with a real-time Ethernet network that transmits to As a method of operating a smart Ethernet switch of a vehicle that supports a real-time Ethernet network,
Receiving a global packet received from a plurality of local networks each having a switch and at least two electronic control units (ECUs) in a frame buffer of a smart Ethernet switch;
Determining whether the number of global packets to be transmitted to a plurality of local networks among the received global packets is zero;
When the number of global packets to be transmitted is zero, transmitting, by the smart Ethernet switch, a cycle boundary packet indicating that one communication period is completed to the plurality of local networks; And
And transmitting the global packet to corresponding local networks if the number of global packets to be transmitted is not zero. 9. The method of claim 8,
The one communication period wherein one of the at least two electronic controls sends a local packet to the corresponding switch, the other of the at least two electronic controls sends a global packet to the corresponding switch, A corresponding packet includes one internal communication phase for transmitting the global packet to the smart ethernet switch and at least one external communication phase for transmitting the global packet to an electronic control unit included in another local network; Method for operating a smart Ethernet switch of a vehicle that is supported by a real-time Ethernet network. 9. The method of claim 8,
And the at least one external communication phase is repeated by a maximum number of the plurality of local networks -1 within the one communication period. 9. The method of claim 8,
The at least two electronic controllers included in the one local network each transmit different packets in the next communication period consecutive with the one communication period, and the smart Ethernet switch of the vehicle supported by the real-time Ethernet network. Method of operation. Ethernet communication method of a vehicle that supports a real-time Ethernet network,
Determining, by each switch, the type of packet transmitted from the at least two electronic controls in each of a plurality of local networks each having a switch and at least two electronic control units (ECUs);
Transmitting a local packet to a smart Ethernet switch connecting the plurality of local networks within each local network according to the type of the packet determined by each switch;
Determining whether the transmission of the global packet is completed in the smart Ethernet switch; And
And transmitting, to the plurality of local networks, a cycle boundary packet indicating that one communication period is completed when the transmission of the global packet is completed. The method of claim 12,
And counting the cycle boundary packet at each of the at least two electronic controls included in each of the plurality of local networks. The method of claim 12,
The one communication period wherein one of the at least two electronic controls sends a local packet to the corresponding switch, the other of the at least two electronic controls sends a global packet to the corresponding switch, A corresponding packet includes one internal communication phase for transmitting the global packet to the smart ethernet switch and at least one external communication phase for transmitting the global packet to an electronic control unit included in another local network; Method for operating a smart Ethernet switch of a vehicle that is supported by a real-time Ethernet network.

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