Energy-saving Ethernet equipment for network cable insertion detection and control method thereof

Abstract

The invention relates to the technical field of wired broadband communication networks, and discloses an energy-saving Ethernet device for network cable insertion detection, which is high in reliability and low in power consumption and comprises a network device controller (110), an RJ45 network port (140) and a network cable insertion detection circuit (150), the network cable insertion detection circuit (150) is used for detecting an electric signal formed when a network cable is inserted into or not inserted into the RJ45 network port (140), and the network device controller (110) is connected with the network device controller (110). And the network equipment controller (110) can judge the state of a network cable plugged into the current RJ45 network port (140) according to the electric signal.

Description

Technical Field

[0001] The present invention relates to the technical field of wired broadband communication networks, and more specifically to an energy-saving Ethernet device for detecting network cable insertion and a control method thereof. Background Art

[0002] In modern network equipment, energy management and Ethernet communication technology are two important technical fields. Network equipment usually needs to communicate data with the outside world through a network interface. Ethernet is a widely used network communication protocol that is efficient, stable and reliable. In terms of energy management, with the increasing demand for energy conservation and emission reduction, how to reduce the energy consumption of network equipment has become an important issue; The existing network cable insertion detection solution mainly uses network software protocols, such as ping commands, to test whether the network cable is inserted after the network port chip is powered on and running normally and the network cable is inserted; if the ping packet can be pinged through, it means that the network cable is inserted. The existing network port energy-saving solution mainly depends on the chip design and process level of the network port itself. The more advanced the chip design and the higher the process level, the lower the power consumption of the network port module.

[0003] However, the prior art requires that the device PHY chip is already working properly before detection can be performed. If the network cable has not been inserted, the network port of the device is not doing any business, but is consuming power consumption of the PHY chip and related circuits. In addition, if the PHY chip is working abnormally, even if a network cable is inserted, the network connectivity cannot be tested through the network software protocol, such as the ping command, which can easily lead to misjudgment. Summary of the invention

[0004] The technical problem to be solved by the present invention is that, for the network port of the above-mentioned device in the prior art, no business is performed, but the power consumption of the PHY chip and related circuits is always consumed; in addition, if the PHY chip works abnormally, even if a network cable is inserted, the network connectivity cannot be pinged through through the network software protocol, such as the ping command, which easily causes the defect of misjudgment. An energy-saving Ethernet device with high reliability and low power consumption and a control method thereof are provided.

[0005] The technical solution adopted by the present invention to solve the technical problem is: construct an energy-saving Ethernet device for detecting network cable insertion, which has: Network equipment controller; An RJ45 network port, which is used to connect different devices via a network cable, one end of which is connected to one end of the network device controller to establish a signal transmission link with the network device controller; A network cable insertion detection circuit, one end of which is connected to a signal end of the network device controller, wherein: The network cable insertion detection circuit is used to detect the electrical signal generated when the RJ45 network port is inserted or not inserted with a network cable, and the network device controller can determine the current state of the RJ45 network port being plugged into the network cable based on the electrical signal.

[0006] In some embodiments, when a network cable is inserted into the RJ45 network port, the network cable insertion detection circuit outputs a first signal according to the current state. When the RJ45 network port is not plugged into a network cable, the network cable insertion detection circuit outputs a second signal according to the current state. The network device controller determines the current state of the RJ45 network port being connected to the network cable according to the first signal or the second signal.

[0007] In some implementations, the RJ45 network port is configured as at least a network device network port and a user terminal network port.

[0008] In some implementations, a network transformer circuit is further included, one end of which is connected to the signal end of the network device controller. The other end of the network transformer circuit is coupled to one end of the RJ45 network port. The RJ45 network port establishes a signal interaction link with the network device controller through the network transformer circuit.

[0009] In some embodiments, the network transformer circuit includes at least a network transformer, One end of the network transformer is connected to the signal end of the RJ45 network port. The other end taps of the network transformer are respectively connected to the signal ends of the network device controller.

[0010] In some embodiments, a PHY network chip and related circuits are also included. One end of the PHY network chip and related circuits is connected to one end of the network transformer circuit, The other end of the PHY network chip and related circuits is connected to the signal end of the network device controller. The RJ45 network port establishes a signal interaction link with the network device controller through the network transformer circuit, the PHY network chip and related circuits.

[0011] In some embodiments, the PHY network chip and related circuits include at least a PHY chip, which is used to perform analog / digital or digital / analog conversion on the received signal and transmit it through a network cable. The PHY chip is connected to one end of the network transformer circuit, The other end of the PHY chip is connected to the signal end of the network device controller.

[0012] In some embodiments, a PHY network chip power supply control circuit is also included. One end of the PHY network chip power supply control circuit is connected to the power supply end of the PHY network chip and related circuits, The other end of the PHY network chip power supply control circuit is connected to the signal end of the network device controller.

[0013] In some implementations, the PHY network chip power supply control circuit includes at least a first transistor and a first MOS transistor. The base of the first transistor is connected to the enable terminal of the network device controller through a third resistor. The collector of the first transistor is connected to the 3.3V power supply terminal through the second resistor. The collector of the first triode is also connected to the gate of the first MOS tube. The source of the first MOS tube is connected to the 3.3V power supply terminal. The drain of the first MOS tube is connected to the power supply terminal of the PHY network chip and related circuits. The emitter of the first transistor is connected to the common end.

[0014] In a second aspect, a control method for an energy-saving Ethernet device for network cable insertion detection is applied to any of the energy-saving Ethernet devices for network cable insertion detection described above, comprising the following steps: S101, network equipment is powered on; S102, turning off the power supply of the PHY network chip and related circuits; S103, detecting whether the RJ45 network port is connected to a network cable, and generating an electrical signal according to the current state; S104, if the network cable is connected, powering on the PHY network chip and related circuits; S105, determining whether the network is connected, and determining whether the RJ45 network port is plugged into a network cable according to the electrical signal, If not, shut down the power supply of the PHY network chip and related circuits. If connected, confirm that the RJ45 network port has been connected to the network cable.

[0015] In the energy-saving Ethernet device for detecting the insertion of a network cable of the present invention, a network device controller, an RJ45 network port and a network cable insertion detection circuit are included, wherein the network cable insertion detection circuit is used to detect the electrical signal formed when the RJ45 network port is inserted or not inserted with a network cable, and the network device controller can judge the current state of the RJ45 network port plugging the network cable according to the electrical signal. Compared with the prior art, the insertion detection of the network cable is realized by a hardware circuit, which can avoid the misjudgment of simply detecting whether the network cable is inserted by the ping command protocol. After judging that the network cable is inserted, the connectivity of the network is further determined by the ping command protocol. Only after the network connection is determined to be reliable, the power supply of the PHY related circuit is continued to be maintained to carry out the network communication business. Otherwise, even if the network cable is inserted, the device will still turn off the power supply of the PHY related circuit to achieve the purpose of energy saving; on the other hand, the power supply of the PHY chip and related circuits is turned off by default when the device is powered on, and the power supply is turned on only after the network cable is detected to be inserted, so that the network device can enter the low power consumption mode by default when it is powered on, and at the same time, when the network link is connected and network business transmission is required, the normal working mode is restored, and the device is effectively energy-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which: Figure 1 It is a framework diagram of an embodiment of an energy-saving Ethernet device for detecting network cable insertion provided by the present invention; Figure 2 It is a circuit diagram related to the PHY interface of a network device (such as a router) in an embodiment of an energy-saving Ethernet device for detecting network cable insertion provided by the present invention; Figure 3 It is a circuit diagram related to the PHY interface of a user terminal (such as a computer PC) of an embodiment of an energy-saving Ethernet device for network cable insertion detection provided by the present invention; Figure 4 It is a circuit diagram related to the PHY interface of a user terminal of another embodiment of the energy-saving Ethernet device for network cable insertion detection provided by the present invention; Figure 5 It is a PHY network chip power supply control circuit diagram of an embodiment of an energy-saving Ethernet device for network cable insertion detection provided by the present invention; Figure 6 The present invention provides a control flow chart of an energy-saving Ethernet device for detecting network cable insertion according to an embodiment of the present invention. DETAILED DESCRIPTION

[0017] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described in detail with reference to the accompanying drawings.

[0018] like Figure 1As shown, in the first embodiment of the energy-saving Ethernet device for network cable insertion detection of the present invention, the energy-saving Ethernet device for network cable insertion detection 100 at least includes a network device controller 110, a PHY network chip and related circuits 120, a network transformer circuit 130, an RJ45 network port 140, a network cable insertion detection circuit 150 and a PHY network chip power supply control circuit 160; The network device controller 110 is the core of the device and has the functions of computing, data processing and signal transmission. It is used for business processing and control of network devices. The PHY network chip and related circuits 120 connect at least one data link layer device (MAC) to a physical medium, such as an optical fiber or a copper cable, for sending and receiving Ethernet data frames and for implementing the physical layer communication function of the PHY; The network transformer 130 is generally composed of magnetic components such as common mode inductors, which are used to achieve electrical isolation and interference suppression of the network port; RJ45 network port 140 is used for data transmission, especially in local area network and broadband Internet access. RJ45 interface is a standard 8-bit modular connector, commonly used to connect twisted pair cables to achieve data communication between devices, and can connect different devices through network cables; The network cable insertion detection circuit 150 is used to detect whether the network cable is inserted or not; The PHY network chip power supply control circuit 160 is used to control the on and off of the PHY chip power supply; Specifically, the network device controller 110 is used to receive electrical signals; Furthermore, the RJ45 network port 140 is used to connect different devices via network cables. One end of the RJ45 network port 140 is connected to one end of the network device controller 110, so that it can establish a signal transmission link with the network device controller 110 to achieve data signal transmission; One end of the network cable insertion detection circuit 150 is connected to a signal end of the network device controller 110, wherein: The network cable insertion detection circuit 150 is used to detect the electrical signal generated when the RJ45 network port 140 is inserted or not inserted with a network cable, and feeds back the acquired electrical signal to the network device controller 110. The network device controller 110 can determine the current state of the RJ45 network port 140 being plugged into the network cable based on the electrical signal.

[0019] Specifically, when a network cable is inserted into the RJ45 network port 140, the network cable insertion detection circuit 150 outputs a first signal (corresponding to a low level) according to the current state. When the RJ45 network port 140 is not plugged into a network cable, the network cable insertion detection circuit 150 outputs a second signal (corresponding to a high level) according to the current state. The network device controller 110 determines the current state of the RJ45 network port 140 being plugged into the network cable according to the first signal or the second signal fed back by the network cable insertion detection circuit 150 .

[0020] like Figure 2 or Figure 3 As shown in the figure, when there is no network cable inserted into the RJ45 network port 140 of the network device (such as a router), Figure 2 The LAN1-TRX1-P network in the LAN is in a suspended state and is not connected to the LAN1-TRX1-N network; The PHY-DET network is connected to the network device controller 110. At this time, the PHY-DET network is pulled up to the 3.3V VCC-3V3 power supply network through the first resistor R101, and the network device controller 110 determines that the received electrical signal is a logic high level; When a network cable is inserted into the RJ45 network port 140 of a network device (such as a router), for example, the RJ45 network port 140 of a user terminal (computer PC) is connected to the RJ45 network port 140 of a router through a network cable, then LAN1-TRX1-P and LAN2-TRX1-P as well as LAN1-TRX1-N and LAN2-TRX1-N are connected together through the network cable. As can be seen from the above detection principle description, the network cable insertion detection circuit 150 can be designed on the four pairs of differential lines (LAN1-TRX2 -P and LAN2-TRX2-P and LAN1-TRX2-N and LAN2-TRX2-N, LAN1-TRX3-P and LAN2-TRX3-P and LAN1-TRX3-N and LAN2-TRX3-N, LAN1-TRX4-P and LAN2-TRX4-P and LAN1-TRX4-N and LAN2-TRX4-N), the above scheme is designed for the pair of LAN1-TRX1-N and LAN1-TRX2-P.

[0021] In some implementations, the RJ45 network port 140 is configured as at least a network device network port and a user terminal network port.

[0022] For example, in Figure 2 In the network transformer circuit 130, the network transformer circuit 130 is an application design in the network device of the present application; exist Figure 3 The network transformer circuit in the user terminal (such as a computer PC) is the same as the network transformer circuit 130 of the present application. In practical applications, the user terminal can also use Figure 4 The traditional transformer is used to design the network transformer circuit.

[0023] In some embodiments, Figure 1-Figure 3 As shown, in order to ensure the electrical isolation and interference suppression of the network port, a network transformer circuit 130 can be set in the device. One end of the network transformer circuit 130 is connected to the signal end of the network device controller 110. The other end of the network transformer circuit 130 is coupled to one end of the RJ45 network port 140. The RJ45 network port 140 establishes a signal interaction link with the network device controller 110 through the network transformer circuit 130 .

[0024] Furthermore, if Figure 2 As shown, the network transformer circuit 130 at least includes a network transformer (corresponding to LC1-LC4), like Figure 3 As shown, the network transformer circuit 130 may further include a network transformer (corresponding to LC5-LC8), like Figure 4 As shown, the network transformer circuit 130 may further include a network transformer (corresponding to J1), like Figure 2 As shown, one end of the network transformer (corresponding to LC1-LC4) is connected to the signal end of the RJ45 network port 140 (router or user terminal), and the other end of the network transformer (corresponding to LC1-LC4) is connected to the signal end of the network device controller 110; or like Figure 3 As shown, one end of the network transformer (corresponding to LC5-LC8) is connected to the signal end of the RJ45 network port 140 (router or user terminal), and the other end of the network transformer (corresponding to LC5-LC8) is connected to the signal end of the network device controller 110, or like Figure 4 As shown, one end of the network transformer (corresponding to J1) is connected to the signal end of the RJ45 network port 140 (router or user terminal), and the other end of the network transformer (corresponding to J1) is connected to the signal end of the network device controller 110.

[0025] Specifically, in Figure 3 In the example, LAN2-TRX1-P is connected to pin 3 of the network transformer LC5, and LAN2-TRX1-N is connected to pin 4 of the network transformer LC5; For the network transformer LC5, its pin 3 is connected to pin 1 through an internal inductor, and pin 4 is connected to pin 2 through an internal inductor. Generally, the pin 1 and pin 2 of the network transformer LC5 are connected together as the center tap, so that pin 3 and pin 4 of LC5 are connected, and then LAN2-TRX1-P and LAN2-TRX1-N are connected together, that is, in Figure 2 LAN1-TRX1-P and LAN1-TRX1-N are connected together; Similarly, in Figure 2 In the embodiment, the No. 3 pin and the No. 1 pin of the network transformer LC1 are connected, and the No. 4 pin and the No. 2 pin are connected. Since the LAN1-TRX1-N is grounded through the No. 4 pin and the No. 2 pin of LC1, the LAN1-TRX1-P is also grounded, and then the PHY-DET network is connected to the LAN1-TRX1-P through the No. 1 and No. 3 pins of LC1 and is also grounded. At this time, the network device controller 110 in the network device (such as a router) can detect a logic low level through the PHY-DET. like Figure 4 As shown, LAN3-TRX1-P is connected to the 13th pin of the network transformer J1, LAN3-TRX1-N is connected to the 14th pin of the network transformer J1, and the 13th and 14th pins of the network transformer J1 are connected together through an internal inductor. Figure 2 In the present application, the RJ45 of the network device (such as a router) is connected to the network cable by inserting the network cable Figure 4 After the user terminal devices in are connected together, Figure 2 The LAN1-TRX1-N and LAN1-TRX1-P in the network are also connected together, so that after the network cable is inserted, the network device controller detects a logic high level through the PHY-DET network; In summary, when the network device controller in the network device (such as a router) detects a logic high level through PHY-DET, there is no network cable plugged into the RJ45 network port 140; When a logic low level is detected, a network cable is inserted into the RJ45 network port 140 .

[0026] In some embodiments, Figure 2-Figure 4 As shown, in order to improve the reliability of signal encoding and decoding / data modulation and demodulation / channel transmission, a PHY network chip and related circuits 120 can be set in the device, which has the functions of conversion between digital signals and analog signals, link management, channel transmission, and error detection and correction; Specifically, one end of the PHY network chip and related circuit 120 is connected to one end of the network transformer circuit 130. The other end of the PHY network chip and related circuit 120 is connected to the signal end of the network device controller 110. The RJ45 network port 140 establishes a signal interaction link with the network device controller 110 through the network transformer circuit 130 and the PHY network chip and related circuits 120 .

[0027] In some embodiments, Figure 2-Figure 4 As shown, in order to improve the reliability of signal encoding and decoding / data modulation and demodulation / channel transmission, a PHY chip can be set in the PHY network chip and related circuit 120, which is used to perform analog / digital or digital / analog conversion on the received signal and transmit it through the network cable. The PHY chip is connected to one end of the network transformer circuit 130. The other end of the PHY chip is connected to the signal end of the network device controller 110 , thereby establishing a signal interaction link between the RJ45 network port 140 , the network transformer circuit 130 , the PHY network chip and related circuits 120 and the network device controller 110 .

[0028] In some embodiments, Figure 1 and Figure 5 As shown, in order to improve the performance of the device, a PHY network chip power supply control circuit 160 can be set in the device, which is used to control the on and off of the PHY chip power supply; Specifically, one end of the PHY network chip power supply control circuit 160 is connected to the power supply end of the PHY network chip and related circuit 120. The other end of the PHY network chip power supply control circuit 160 is connected to the signal end of the network device controller 110 .

[0029] Furthermore, if Figure 5 As shown, the PHY network chip power supply control circuit 160 at least includes a first transistor VT102 and a first MOS transistor VT101, wherein the first transistor VT102 is an NPN transistor, which has a switch function. The first MOS tube VT101 is selected as a P-channel MOS tube, which has a switch function; Specifically, the base of the first transistor VT102 is connected to the enable terminal (corresponding to PHY-PWR-EN) of the network device controller 110 through the third resistor R103. The collector of the first transistor VT102 is connected to the 3.3V power supply terminal through the second resistor R102. The collector of the first transistor VT102 is also connected to the gate of the first MOS tube VT101. The source of the first MOS tube VT101 is connected to the 3.3V power supply terminal. The drain of the first MOS tube VT101 is connected to the power supply terminal of the PHY network chip and related circuit 120. The emitter of the first transistor VT102 is connected to the common terminal.

[0030] Specifically, PHY-3V3 supplies power to the PHY network chip and related circuits 120, and VCC-3V3 is the input power provided by the network device; The PHY-PWR-EN network is connected to the network device controller 110 in the network device, which outputs high and low logic levels; When the default output of PHY-PWR-EN of the network device controller 110 is low, the first transistor VT102 is not conducting, the gate of the first MOS tube VT101 is high, the S and D poles of the first MOS tube VT101 are not conducting, that is, VCC-3V3 and PHY-3V3 are not connected, so that the power supply of the PHY network chip and the related circuit 120 is turned off; When the network device controller 110 detects that the network cable is plugged in, PHY-PWR-EN outputs a high level, the first transistor VT102 is turned on, the gate of the first MOS tube VT101 is at a low level, and the S and D poles of the first MOS tube VT101 are turned on, that is, VCC-3V3 and PHY-3V3 are connected, thereby turning on the power supply of the PHY network chip and related circuits 120.

[0031] Second, as Figure 6 As shown, a control method for an energy-saving Ethernet device with network cable insertion detection is applied to any of the above energy-saving Ethernet devices with network cable insertion detection 100, comprising the following steps: S101, network equipment is powered on; S102, turning off the power supply of the PHY network chip and the related circuit 120; S103, detecting whether the RJ45 network port 140 is connected to a network cable, and generating an electrical signal according to the current state; S104, if the network cable is connected, power supply to the PHY network chip and related circuits 120 is turned on; S105, judging whether the network is connected, and judging whether the RJ45 network port 140 is plugged into the network cable according to the electrical signal, that is, judging whether it is connected through Ping packet detection, If not, a fault alarm is output, and the power supply of the PHY network chip and related circuits 120 is turned off. If connected, the PHY network chip and related circuit 120 are powered on for a preset time (eg, 1 minute), and it is confirmed that the RJ45 network port 140 is connected to the network cable.

[0032] This technical solution has the following technical effects: 1) When the device is powered on, the power supply of the PHY chip and related circuits is turned off by default. The power supply is turned on only after the network cable is detected to be plugged in. In this way, the network device can enter the low-power mode by default when it is powered on, and resume the normal working mode only when the network link is connected and network service transmission is required, thus realizing effective energy saving of the device. At the same time, compared with the energy-saving solution of improving the chip design and process level of the network port itself, this application only needs to add simple low-cost electronic materials based on the general circuit design of the PHY network port, which also has obvious advantages in cost; 2) Implementing network cable insertion detection through hardware circuits can avoid misjudgment of simply detecting whether the network cable is inserted through the ping command protocol. After determining that the network cable is inserted, the ping command protocol is further used to determine the connectivity of the network. Only after the network connection is confirmed to be reliable, the PHY-related circuits will continue to be powered and network communication services will be carried out; otherwise, even if a network cable is inserted, the device will still shut down the power supply of the PHY-related circuits to achieve the purpose of energy saving, and at the same time report fault alarm information to notify the user that the network communication link of the device is abnormal and needs to be checked and repaired in time; 3) By detecting the network cable insertion status to control the power consumption of the device, the power consumption of the device can be effectively reduced when the network is not in use, the battery life of the device can be extended, and the energy utilization efficiency of the device can be improved. In addition, this technical solution can also provide feedback on abnormal network connection status through fault alarm indication, thereby improving the user experience; 4) Network cable insertion detection is achieved through level detection and processor logic control. The hardware implementation is relatively simple and suitable for various network devices. This low-power design can not only reduce the energy consumption of the equipment, but also reduce the heat dissipation requirements of the equipment, further reduce energy consumption, and meet the needs of energy conservation and emission reduction.

[0033] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the present invention and the claims, which all fall within the protection of the present invention.

Claims

1. An energy-saving Ethernet device for detecting network cable insertion, characterized in that: have: Network equipment controller; An RJ45 network port, which is used to connect different devices via a network cable, one end of which is connected to one end of the network device controller to establish a signal transmission link with the network device controller; A network cable insertion detection circuit, one end of which is connected to a signal end of the network device controller, wherein: The network cable insertion detection circuit is used to detect the electrical signal generated when the RJ45 network port is inserted or not inserted with a network cable, and the network device controller can determine the current state of the RJ45 network port being plugged into the network cable based on the electrical signal.

2. The energy-saving Ethernet device for detecting network cable insertion according to claim 1, characterized in that: When a network cable is inserted into the RJ45 network port, the network cable insertion detection circuit outputs a first signal according to the current state. When the RJ45 network port is not plugged into a network cable, the network cable insertion detection circuit outputs a second signal according to the current state. The network device controller determines the current state of the RJ45 network port being connected to the network cable according to the first signal or the second signal.

3. The energy-saving Ethernet device for detecting network cable insertion according to claim 1 or 2, characterized in that: The RJ45 network port is at least configured as a network device network port and a user terminal network port.

4. The energy-saving Ethernet device for detecting network cable insertion according to claim 1 or 2, characterized in that: It also includes a network transformer circuit, one end of which is connected to the signal end of the network device controller. The other end of the network transformer circuit is coupled to one end of the RJ45 network port. The RJ45 network port establishes a signal interaction link with the network device controller through the network transformer circuit.

5. The energy-saving Ethernet device for detecting network cable insertion according to claim 4, characterized in that: The network transformer circuit at least comprises a network transformer, One end of the network transformer is connected to the signal end of the RJ45 network port. The other end taps of the network transformer are respectively connected to the signal ends of the network device controller.

6. The energy-saving Ethernet device for detecting network cable insertion according to claim 5, characterized in that: It also includes PHY network chips and related circuits. One end of the PHY network chip and related circuits is connected to one end of the network transformer circuit, The other end of the PHY network chip and related circuits is connected to the signal end of the network device controller. The RJ45 network port establishes a signal interaction link with the network device controller through the network transformer circuit, the PHY network chip and related circuits.

7. The energy-saving Ethernet device for detecting network cable insertion according to claim 6, characterized in that: The PHY network chip and related circuits at least include a PHY chip, which is used to perform analog / digital or digital / analog conversion on the received signal and transmit it through a network cable. The PHY chip is connected to one end of the network transformer circuit, The other end of the PHY chip is connected to the signal end of the network device controller.

8. The energy-saving Ethernet device for detecting network cable insertion according to claim 7, characterized in that: It also includes the PHY network chip power supply control circuit. One end of the PHY network chip power supply control circuit is connected to the power supply end of the PHY network chip and related circuits, The other end of the PHY network chip power supply control circuit is connected to the signal end of the network device controller.

9. The energy-saving Ethernet device for detecting network cable insertion according to claim 8, characterized in that: The PHY network chip power supply control circuit at least includes a first transistor and a first MOS transistor. The base of the first transistor is connected to the enable terminal of the network device controller through a third resistor. The collector of the first transistor is connected to the 3.3V power supply terminal through the second resistor. The collector of the first triode is also connected to the gate of the first MOS tube. The source of the first MOS tube is connected to the 3.3V power supply terminal. The drain of the first MOS tube is connected to the power supply terminal of the PHY network chip and related circuits. The emitter of the first transistor is connected to the common end.

10. A control method for an energy-saving Ethernet device with network cable insertion detection, characterized in that: The energy-saving Ethernet device used for detecting the insertion of a network cable according to any one of claims 1 to 9 comprises the following steps: S101, network equipment is powered on; S102, turning off the power supply of the PHY network chip and related circuits; S103, detecting whether the RJ45 network port is connected to a network cable, and generating an electrical signal according to the current state; S104, if the network cable is connected, powering on the PHY network chip and related circuits; S105, determining whether the network is connected, and determining whether the RJ45 network port is plugged into a network cable according to the electrical signal, If not, shut down the power supply of the PHY network chip and related circuits. If connected, confirm that the RJ45 network port has been connected to the network cable.

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