Redundant circuit for network transmission system and network transmission system

Abstract

The utility model discloses a redundant circuit used for a network transmission system, the network transmission system comprises a terminal, a network connector and a switch, the terminal is electrically connected with the switch through the network connector, the network connector comprises a first port and a second port, the first port is electrically connected with the switch, and the second port is electrically connected with the terminal. Under the condition that the switch is normally electrified, the first port and the second port are disconnected; the redundant circuit comprises a switch element which is used for controlling the connection or disconnection state between the first port and the second port and controlling the first port and the second port to be connected when the switch is powered off; and the switching element driving circuit is used for receiving a first driving signal representing the current power-on state of the switch and controlling the state of the switching element based on the first driving signal. Based on the redundant circuit, it can be ensured that data can be forwarded out under the condition that the switch is powered off, and data loss is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to network data transmission field especially, a kind of redundancy circuit and network transmission system for network transmission system. BACKGROUND

[0002] In the data transmission process of Ethernet, terminal often needs to be connected with upper connection equipment through network connector, to realize the sending and receiving of data. Specifically, taking sending data as an example, in the case of normal power-on of switch, the terminal is connected with one port of network connector, and the data in the terminal is transmitted to network transformer through another port of network connector, and is forwarded to the chip of switch by coupling of network transformer, and the chip of switch is transmitted to target address finally by internal forwarding storage, at this time, the data transmission in each port in network connector does not interfere with each other.

[0003] However, switch is only responsible for the storage and forwarding of data, and both storage and forwarding must be in the case of power-on. Once switch is powered off, the whole data chain forwarded by switch will be invalid. If the current data chain contains critical data information, it will cause great loss. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of redundancy circuit and network transmission system for network transmission system, which can still forward data link completely in the abnormal condition of switch.

[0005] To achieve the above object, the utility model discloses a kind of redundancy circuit for network transmission system, wherein the network transmission system includes terminal, network connector and switch, the terminal is electrically connected with the switch by the network connector, the switch is used to store and forward the data sent by the terminal, the network connector includes first port and second port, the first port is electrically connected with the switch, the second port is electrically connected with the terminal, in the case of normal power-on of the switch, the first port and the second port are disconnected;The redundancy circuit includes:

[0006] Switching element, for controlling the communication / disconnection state between the first port and the second port, and controlling the first port and the second port to communicate when the switch is powered off;

[0007] Switching element drive circuit, for receiving first drive signal indicating the current power-on state of the switch, and controlling the state of the switching element based on the first drive signal.

[0008] Optionally, the switch element comprises a relay, a common terminal of the relay is electrically connected with the first port, a normally closed terminal of the relay is electrically connected with the second port, and a normally open terminal of the relay is electrically connected with the first port.

[0009] Further, the first port comprises a first differential signal line, the second port comprises a second differential signal line corresponding to the first differential signal line, the common terminal of the relay comprises a first common terminal and a second common terminal, the normally closed terminal of the relay comprises a first normally closed terminal and a second normally closed terminal, and the normally open terminal of the relay comprises a first normally open terminal and a second normally open terminal.

[0010] One end of a positive signal line of the first differential signal line and one end of a negative signal line thereof are electrically connected with the first common terminal and the second common terminal respectively, the other end of the positive signal line of the first differential signal line and the other end of the negative signal line thereof are electrically connected with the first normally open terminal and the second normally open terminal respectively, and a positive signal line of the second differential signal line and a negative signal line thereof are electrically connected with the first normally closed terminal and the second normally closed terminal respectively.

[0011] Optionally, the switch element driving circuit comprises a voltage source, a first transistor and a first resistor, one end of the coil of the relay is electrically connected with the voltage source, one controllable conduction terminal of the first transistor is electrically connected with the other end of the coil of the relay, the other controllable conduction terminal of the first transistor is grounded, the control terminal of the first transistor is used for receiving the first driving signal, one end of the first resistor is electrically connected with the control terminal of the first transistor, and the other end of the first resistor is electrically connected with the controllable conduction terminal of the first transistor grounded.

[0012] Further, a signal node is further arranged between the voltage source and the coil of the relay, and the switch element driving circuit further comprises a first diode, one end of the first diode is electrically connected with the signal node, and the other end of the first diode is electrically connected between the coil of the relay and the first transistor.

[0013] Further, the redundancy circuit further comprises a second resistor, and the second resistor is arranged between the voltage source and the signal node.

[0014] Optionally, the redundancy circuit further comprises a third resistor, and the third resistor is electrically connected with the control terminal of the first transistor and grounded through the first resistor.

[0015] The utility model discloses still disclose a network transmission system, it is characterized by, including terminal, network connector, network transformer, switch and a plurality of as above for network transmission system's redundancy circuit, the network connector includes first port and second port, the first port passes through network transformer with switch electric connection, the second port with terminal electric connection.

[0016] Optionally, the network connector is an RJ-45 interface.

[0017] Compared with the prior art, the network transmission system redundancy circuit disclosed in the technical scheme of the utility model comprises a switching element and a switching element driving circuit, the switching element driving circuit detects and receives a first driving signal indicating the current power-on state of the switch, when the switch is normally powered on, the first port and the second port of the network connector are disconnected, and data is forwarded from the network connector to the switch, when the switch is powered off, the first port and the second port of the network connector are connected, thereby forming a data channel, and data link is transmitted through the channel, ensuring normal forwarding of data. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the structural schematic diagram of network connector of the utility model embodiment.

[0019] Figure 2 It is the circuit schematic diagram of the first pair of differential signal line of network connector in the utility model embodiment connecting redundancy circuit.

[0020] Figure 3 It is the circuit schematic diagram of the second pair of differential signal line of network connector in the utility model embodiment connecting redundancy circuit.

[0021] Figure 4 It is the circuit schematic diagram of the third pair of differential signal line of network connector in the utility model embodiment connecting redundancy circuit.

[0022] Figure 5 It is the circuit schematic diagram of the fourth pair of differential signal line of network connector in the utility model embodiment connecting redundancy circuit.

[0023] Figure 6 It is the structural schematic diagram of network transmission system of the utility model embodiment. DETAILED DESCRIPTION

[0024] To explain the technical content, structural features, realized purposes and effects of the utility model in detail, the following is explained in detail in combination with the embodiment and the drawings.

[0025] Referring to Figure 1 and Figure 6 The embodiment discloses a network transmission system which can be used for transmitting network data. The network transmission system comprises a terminal, a network connector, a network transformer, a switch and a redundancy circuit.

[0026] The terminal, or user equipment, refers to an input and output device connected with a computer system. In a computer network, the terminal device is connected with the switch through the network connector and the network transformer in turn, thereby accessing the network and realizing data exchange and communication.

[0027] The network connector is used for realizing physical connection and data transmission between network devices. The terminal is electrically connected with the network transformer through the network connector. In the embodiment, the network connector comprises a first port RJ1 and a second port RJ2. The first port RJ1 is electrically connected with the switch through the network transformer, and the second port RJ2 is electrically connected with the terminal. When the switch is normally powered on, the first port RJ1 and the second port RJ2 are disconnected, and the transmission of data signals does not interfere with each other, and each processes its own signal.

[0028] The network transformer is used for improving the transmission quality of data signals, reducing data loss and electromagnetic interference, etc.

[0029] The switch realizes fast forwarding and switching of data based on MAC address recognition.

[0030] The terminal is electrically connected with the network transformer through the network connector. The network transformer couples and performs other operations on the data signals, and then forwards the data signals to the chip of the switch. The chip of the switch transmits the data signals out from other ports through internal storage and forwarding, so as to reach the terminal device pointed by the target address. The terminal, the network connector, the network transformer and the switch are the conventional configurations in the process of Ethernet data transmission, and therefore the specific composition and working principle thereof will not be described herein.

[0031] Referring to Figures 1 to 5 The redundancy circuit for the network transmission system in the embodiment comprises a switching element K and a switching element driving circuit KDC.

[0032] The switching element K is used for controlling the connection or disconnection state between the first port RJ1 and the second port RJ2, and controlling the connection between the first port RJ1 and the second port RJ2 when the switch is powered off.

[0033] The switching element driving circuit KDC is used for receiving a first driving signal S1 representing the current power-on state of the switch, and controlling the state of the switching element K based on the first driving signal S1.

[0034] Specifically, the switch element K includes a relay, a common terminal KP of the relay is electrically connected with the first port RJ1, a normally closed terminal KC of the relay is electrically connected with the second port RJ2, and a normally open terminal KO of the relay is electrically connected with the first port RJ1. When the switch is normally powered, the relay is attracted to the normally open terminal KO due to the current passing through, at this time, the first port RJ1 and the second port RJ2 are not connected, and independently receive and transmit data; when the switch is powered off, the common terminal KP is attracted to the normally closed terminal KC due to the loss of magnetic force, at this time, the first port RJ1 and the second port RJ2 are connected to form a physical data path, and the remaining data part of the data link that should be transmitted through the switch is transmitted from the data path.

[0035] Further, referring to Figures 1 to 5 As shown, the first port RJ1 includes a first differential signal line, and the second port RJ2 includes a second differential signal line corresponding to the first differential signal line. The common terminal KP of the relay includes a first common terminal KP1 and a second common terminal KP2, the normally closed terminal KC of the relay includes a first normally closed terminal KC1 and a second normally closed terminal KC2, and the normally open terminal KO of the relay includes a first normally open terminal KO1 and a second normally open terminal KO2. When the switch is normally powered, the relay is powered to generate a magnetic attraction force, and the first common terminal KO1 and the second common terminal KO2 are respectively connected to the first normally open terminal KO1 and the second normally open terminal KO2; when the switch is powered off, the magnetic force of the relay disappears, and the first common terminal KO1 and the second common terminal KO2 are respectively connected to the first normally closed terminal KC1 and the second normally closed terminal KC2.

[0036] One end of the positive signal line and one end of the negative signal line of the first differential signal line are respectively electrically connected to the first common terminal KP1 and the second common terminal KP2, the other end of the positive signal line and the other end of the negative signal line of the first differential signal line are respectively electrically connected to the first normally open terminal KO1 and the second normally open terminal KO2, and the positive signal line and the negative signal line of the second differential signal line are respectively electrically connected to the first normally closed terminal KC1 and the second normally closed terminal KC2.

[0037] Among them, the number of differential signal lines for transmitting signals in the first differential signal line and the second differential signal line is related to the rate of network transmission (i.e. whether it is a hundred megabit, gigabit network), which needs to be set according to the actual use. When applied to a hundred megabit network, 2 pairs of differential signal lines in the network connector need to be connected to transmit data signals, and when applied to a gigabit network, 4 pairs of differential signal lines in the network connector need to be connected to transmit data signals. Referring to Figures 1 to 5As shown in the figure, in the embodiment, the network connector is an RJ-45 interface, the first port RJ1 and the second port RJ2 each include four pairs of differential signal lines (i.e. MDID±0A, MDID±0B, MDID±0C, MDID±0D and MDID±1A, MDID±1B, MDID±1C and MDID±1D), each pair of differential signal lines realizes the connection between the first port RJ1 and the second port RJ2 by connecting a set of the redundancy circuit of the embodiment. Each pair of differential signal lines is connected to the common end KP, the normally closed end KC and the normally open end KO of the corresponding relay in each redundancy circuit according to the positive and negative.

[0038] Referring again to Figures 2 to 5 As shown in the figure, the switch element driving circuit KDC includes a voltage source V, a first transistor T and a first resistor R1, one end of the coil of the relay is electrically connected to the voltage source V, one controllable conduction end of the first transistor T is electrically connected to the other end of the coil of the relay, the other controllable conduction end of the first transistor T is grounded, the control end of the first transistor T is used for receiving the first driving signal S1, one end of the first resistor R1 is electrically connected to the control end of the first transistor T, the other end of the first resistor R1 is electrically connected to the controllable conduction end of the first transistor T grounded, the first resistor R1 is used as a pull-down resistor for keeping the first transistor T in an off state when the switch is powered off. In the embodiment, the voltage source V is a direct current voltage source, and the voltage is preferably 3.3V, and the resistance value of the first resistor R1 is preferably 100KΩ.

[0039] In the embodiment, the first driving signal S1 represents the power-on state of the current switch, which is used for controlling the conduction state of the first transistor T and further controlling the working state of the relay. When the switch is normally powered on, the first driving signal S1 is high, the first transistor T is in a conduction state, and the current passes through the coil of the relay to generate a magnetic field, which attracts the common end KP of the relay to be connected to the normally open end KO of the relay, and the data is forwarded from the first port RJ1 to the network transformer; when the switch is powered off or in other abnormal states, the first driving signal S1 is low, the first transistor T is in an off state, and there is no current in the coil of the relay, the common end KP of the relay rebounds to be connected to the normally closed end KC of the relay, and the first port RJ1 and the second port RJ2 are connected to form a data path to transmit data.

[0040] In another aspect, in the embodiment, a signal node ND is further arranged between the voltage source V and the coil of the relay, and the switch element driving circuit KDC further comprises a first diode D1, one end of the first diode D1 is electrically connected to the signal node ND, and the other end of the first diode D1 is electrically connected between the coil of the relay and the first transistor T. In the embodiment, the first diode D1 is used as a freewheeling diode to avoid reverse electromotive force generated when the coil of the relay is powered off, thereby damaging other elements in the circuit.

[0041] In another aspect, in the embodiment, a second resistor R2 and a third resistor R3 are further included, the second resistor R2 is arranged between the voltage source V and the signal node ND, and the third resistor R3 is electrically connected to the control end of the first transistor T and grounded through the first resistor R1. The second resistor R2 and the third resistor R3 are used as current limiting resistors. In the embodiment, the preferred values of the second resistor R2 and the third resistor R3 are 100R and 1000R respectively.

[0042] To sum up, the utility model discloses a kind of redundancy circuit and network transmission system for network transmission system, the redundancy circuit is used to normally realize the forwarding and transmission of data in the case where switch is powered off or abnormal in network transmission system, can effectively prevent network interruption and data loss situation caused by switch failure, so as to ensure the continuity and integrity of data transmission, further reduce the service interruption risk caused by network failure, provide more solid network support for various application scenarios.Simultaneously, the design of the redundancy circuit of the embodiment also fully considers cost, realizes performance by simple and efficient design scheme, brings economic solution to user.

[0043] It is apparent to those skilled in the art that the utility model is not limited to the details of the above exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the utility model. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the utility model is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the essential elements of the claims are intended to be included in the utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0044] The above disclosed is only the preferred embodiment of the utility model, and of course cannot limit the scope of protection of the utility model, so equivalent changes made in the scope of patent application of the utility model still belong to the scope covered by the utility model.

Claims

1. A redundancy circuit for a network transmission system, characterized in that, The network transmission system comprises a terminal, a network connector and a switch, the terminal is electrically connected with the switch through the network connector, the switch is used for storing and forwarding data sent by the terminal, the network connector comprises a first port and a second port, the first port is electrically connected with the switch, the second port is electrically connected with the terminal, and the first port and the second port are disconnected in the case that the switch is normally powered on; the redundancy circuit comprises: a switch element for controlling the communication or disconnection state between the first port and the second port, and controlling the communication of the first port and the second port when the switch is powered off; a switch element driving circuit for receiving a first driving signal representing the current power-on state of the switch, and controlling the state of the switch element based on the first driving signal.

2. The redundancy circuit for a network transmission system of claim 1, wherein, The switch element comprises a relay, a common terminal of the relay is electrically connected with the first port, a normally closed terminal of the relay is electrically connected with the second port, and a normally open terminal of the relay is electrically connected with the first port.

3. The redundancy circuit for a network transmission system of claim 2, wherein, The first port comprises a first differential signal line, the second port comprises a second differential signal line corresponding to the first differential signal line, the common terminal of the relay comprises a first common terminal and a second common terminal, the normally closed terminal of the relay comprises a first normally closed terminal and a second normally closed terminal, and the normally open terminal of the relay comprises a first normally open terminal and a second normally open terminal; one end of the positive signal line of the first differential signal line and one end of the negative signal line thereof are electrically connected with the first common terminal and the second common terminal respectively, the other end of the positive signal line of the first differential signal line and the other end of the negative signal line thereof are electrically connected with the first normally open terminal and the second normally open terminal respectively, and the positive signal line and the negative signal line of the second differential signal line are electrically connected with the first normally closed terminal and the second normally closed terminal respectively.

4. The redundancy circuit for a network transmission system of claim 2, wherein, The switch element driving circuit comprises a voltage source, a first transistor and a first resistor, one end of the coil of the relay is electrically connected with the voltage source, one controllable conduction terminal of the first transistor is electrically connected with the other end of the coil of the relay, the other controllable conduction terminal of the first transistor is grounded, the control terminal of the first transistor is used for receiving the first driving signal, one end of the first resistor is electrically connected with the control terminal of the first transistor, and the other end of the first resistor is electrically connected with the controllable conduction terminal of the first transistor grounded.

5. The redundancy circuit for a network transmission system of claim 4, wherein, A signal node is further arranged between the voltage source and the coil of the relay, and the switch element driving circuit further comprises a first diode, one end of the first diode is electrically connected with the signal node, and the other end of the first diode is electrically connected between the coil of the relay and the first transistor.

6. The redundancy circuit for a network transmission system of claim 5, wherein, A second resistor is further arranged between the voltage source and the signal node.

7. The redundancy circuit for a network transmission system of claim 4, wherein, A third resistor is further electrically connected with the control terminal of the first transistor and grounded through the first resistor.

8. A network transmission system, characterized by, A network transmission system comprising a terminal, a network connector, a network transformer, a switch and a number of redundancy circuits for a network transmission system according to any one of claims 1 to 7, said network connector comprising a first port and a second port, said first port being electrically connected to said switch via said network transformer, said second port being electrically connected to said terminal.

9. The network transmission system of claim 8, wherein, Said network connector is an RJ-45 interface.

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