KR100569146B1 - An optical communication multiplex diagnosis system - Google Patents

Abstract

By monitoring the communication status at each node during the communication between systems using the optical communication network, it is possible to respond quickly to problems due to communication failure,

In a vehicle communication network system for physically connecting a communication path between a transmitting side load and a receiving side load through a multiplex consisting of a plurality of nodes,

A self-diagnostic unit which connects a plurality of nodes for determining a communication path of a signal transmitted through a switching operation within the transmission side load and the multiplex, and constantly monitors the communication status of each node for determining a receiving side. It further comprises.

Optical communication, multiplex, network, node, communication failure

Description

Optical communication multiplex diagnostic device {AN OPTICAL COMMUNICATION MULTIPLEX DIAGNOSIS SYSTEM}

1 is a block diagram of an optical communication multiplex diagnostic apparatus according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating the occurrence of communication failure at a specific node and detecting the same in the optical communication multiplex diagnostic apparatus according to an exemplary embodiment of the present invention.

3 is a block diagram of a general optical communication multiplex.

The present invention relates to an optical communication network system, and more particularly, to an optical communication multiplex diagnosis for monitoring a communication state at each node during communication between systems using an optical communication network so as to quickly respond to a problem due to communication failure. Relates to a device.

Automobiles are equipped with electronic systems such as various driving aids and convenience devices, and communication network systems are applied to smoothly operate and control the electronic systems.

In addition, the communication network system is required to apply a communication network system using optical communication in order to improve the efficiency of transmitting and receiving various control signals and to implement a more reliable communication network system.

According to the application of such a communication network system, it is possible to provide a multi-functionality for a vehicle electric system and to control the electric system more efficiently. If a fault occurs in the system, such as failure, it is difficult to diagnose and improve the problem.

In addition, the communication network system is connected to the entire system has a disadvantage that the communication failure of some systems may lead to the inoperability of the entire vehicle system.

As shown in the accompanying FIG. 3 to build an optical communication network system in a vehicle, each electric field system (hereinafter referred to as a “load”) is connected to the multiplex (A) and implemented to transmit a signal. Is done as follows:

In the figure, if load A (1) and load B (2) are referred to as the transmitting side, and load C (5) and load D (6) are referred to as the receiving side, they are transmitted from load A (1) and load B (2). The signal is transmitted to the load C (5) and the load D (6), each of which is the signal to which the switched signal is transmitted through the optical communication line in the multiplex (A).

At this time, the transmission of the signal in the multiplex A, that is, the determination of the receiving side is performed by a switching operation according to the signals applied to the power supply terminals C1 and the control terminals C2, C3, and C4 by control means (not shown). At 1 (A1) and at node 2 (A2).

At this time, the communication network is defective due to the improper switching of the input signal according to the signal applied through the control terminals C2, C3, and C4 or the transmission of the input signal due to the abnormality of the optical communication line in the multiplex (A). If this occurs, diagnosis is required.

In addition, with the increase in the electrical system in the vehicle, the structure of such a multiplex becomes more complicated, and the number thereof increases, so that a necessity of verifying at which position in the vehicle is not normally performed is required.

However, in a conventional system, when such a communication failure occurs, it is difficult to identify it, and in the case of a defect in the multiplex, it is impossible to find and correct it.

In addition, unlike the conventional electrical system, verifying the loss of the input signal, etc. on the communication network is more difficult than the communication system by the electric signal in the optical communication system.

As described above, the absence of the self-diagnosis function in the communication system has a problem of reducing the reliability of the vehicle communication system and consequently acting as a factor that degrades the overall system quality of the vehicle.

The present invention has been invented to solve the above problems, the purpose of which is to monitor and verify the communication status of the network at all times on the automotive optical communication network, and if the transmission failure occurs in any node, the effective location We propose a self-diagnostic algorithm and an optical communication network system supporting the same.

In the present invention for realizing the above object in the vehicle communication network system for physically connecting the communication path between the transmitting side load and the receiving side load through a multiplex consisting of a plurality of nodes,

A self-diagnostic unit which connects a plurality of nodes for determining a communication path of a signal transmitted through a switching operation within the transmission side load and the multiplex, and constantly monitors the communication status of each node for determining a receiving side. It provides an optical communication multiplex diagnostic device further comprising.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a configuration of an optical communication network system according to an embodiment of the present invention. As shown in FIG. 1, the load side A 11 of the node 1 (21) to node 5 (which is switched inside the multiplex 20) is illustrated. 25 is physically connected to the load B (31) to the load G (36) configured on the receiving side.

In addition, nodes 1 (21) to 5 (25) which determine a receiving side with respect to a signal transmitted through a switching operation inside the transmitting load A (11) and the multiplex (20) are always in a communication state. It is connected to the self-diagnosis unit 10 for monitoring.

Therefore, the self-diagnosis unit 10 constantly monitors the transmission status of the signal input to the nodes 1 (21) to 5 (25) to monitor whether there is a transmission failure.

In the self-diagnosis unit 10, as shown in Table 1 below, in order to efficiently check the signal transmission status between all nodes in the multiplex and the load, signals transmitted from the load A of the transmission side are respectively transmitted through each node of the multiplex. The table for the paths to be delivered to the load of is set so that it is possible to self-diagnose in real time whether the signal transmitted from the transmitting side load A is normally transmitted to each of the loads B to G loaded on the receiving side.

START ID END ID 1 END ID 2 One Load A Node 1 NULL 2 Node 1 Node 2 Node 5 3 Node 2 Node 3 Node 4 4 Node 3 Load B Load C 5 Node 4 Load D Load E 6 Node 5 Load F Load G

That is, when a signal is transmitted from the load side A 11, the signal is transmitted to the node 1 21 in the multiplex 20, and the node 2 22 and the node 5 25 by the switching operation of the node 1 21. ), And a transmission path to node 3 (23) and node 4 (24) is determined by the switching operation of node 2 (22).

In addition, the node 5 (25) receiving the signal from the node 1 (21) transmits the signal transmitted from the load side A 11 to the load F 35 and the load G 36 through a switching operation.

Then, the node 3 (23) receiving the transmission signal of the load A (11) from the node 2 (22) receives the signal transmitted from the load side A (11) load B (31) and load C through a switching operation. Transfer to 32.

In addition, the node 4 (24) receiving the transmission signal of the load A (11) from the node 2 (22) transmits the signal transmitted from the transmitting load 11 through the load D (33) and load E ( 34).

Therefore, the self-diagnosis unit 10 transmits a signal from the transmitting side load A 11 to the receiving side load B 31 to the load G 36 in the adjacent node at each node inside the multiplex 20. It monitors the connection status of the network and stores the ID of the adjacent node when the connection is confirmed normally.

However, as shown in FIG. 2, when communication failure occurs at node 4 (24) inside the multiplex 20, the transmission side load A (to the receiving side load D 33 and load E 34) The signal transmitted in 11) is not transmitted.

At this time, since the self-diagnosis unit 10 cannot transmit to the adjacent node or the load due to the communication failure of the node 4 24, the node 4 24 communicates with the node 4 24 by storing the ID of the adjacent node as Fail. By diagnosing that an error has occurred, it is possible to easily verify the point where the communication error occurred and its cause.

As described above, the present invention diagnoses a communication line state inside a multiplex device constituting an optical communication network in a vehicle in real time, and in case of a communication failure, diagnoses a communication failure state and a communication failure part in real time. Even if the communication network becomes complicated due to the increase, the safety and efficiency of the communication connection state can be achieved, and the connection state between all units using the optical communication can be diagnosed in real time.

Claims (2)

In a vehicle communication network system for physically connecting a communication path between a transmitting side load and a receiving side load through a multiplex consisting of a plurality of nodes, A self-diagnostic unit which connects a plurality of nodes for determining a communication path of a signal transmitted through a switching operation within the transmission side load and the multiplex, and constantly monitors the communication status of each node for determining a receiving side. Optical communication multiplex diagnostic device further comprising. The method of claim 1, In the self-diagnosis unit, a table for a communication path through which a signal transmitted from a transmitting side load is transmitted to a receiving side load is set, and the ID of an adjacent node as a destination is tableed up during the signal transmission process, and communication is performed at an arbitrary node. The optical communication multiplex diagnosis apparatus, characterized in that the self-diagnosis of the communication failure of the corresponding node in real time by setting the ID of the node or the load of the destination to "error" when the failure is detected.

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