CN1972314B - Method for simulating serial interface on Ethernet interface and components applying the method - Google Patents

Abstract

A method of emulating a serial interface on an ethernet interface, comprising the steps of: (1) the sending end firstly converts the control information on the serial bus into an Ethernet message and then sends the Ethernet message by utilizing an Ethernet interface of the sending end; (2) the receiving end firstly utilizes the Ethernet interface of the local end to receive the Ethernet message, and then converts the received Ethernet message into serial port format data so as to obtain control information. The invention can simulate the serial interface by utilizing the existing Ethernet interface without adding new hardware, thereby reducing the cost. The invention also discloses a first component and a second component applying the method.

Description

Method for simulating serial interface on Ethernet interface and components applying the method

technical field

The invention relates to the network field, in particular to a method for simulating a serial interface on an Ethernet interface and a first component and a second component applying the method.

Background technique

With the rapid development and gradual refinement of network services, traditional network devices are no longer handy in handling these services. For example, devices are required to be able to forward data and access voice, and devices are required to perform load sharing and content security filtering. At this time, it is difficult for an independent technology manufacturer to provide all the services required by users at the same time. For this reason, users generally need to purchase equipment from multiple manufacturers and connect the equipment together. In this way, not only interoperability problems often occur, and the cooperation between devices is not easy to negotiate, but also brings a burden on the management and maintenance of devices.

Taking a switching device (the switching device includes a switch and a router) as an example, at present, according to the position and function in the network, the switching device is usually divided into a low-end switching device and a core switching device. The main function of middle and low-end switching equipment is to collect and perform business management, and the main function of core switching equipment is to fast forward, so that data packets can pass through the IP backbone network as quickly as possible. The middle and low-end switching devices are generally located at the edge of the network, and the implementation scheme is a general single-processor (CPU) centralized switching device. Since the centralized switching equipment has a good price and cost advantage, it is widely used. Centralized switching equipment can rely on a single processor with simple internal functions to achieve switching functions. However, in the face of increasingly rich service feature requirements, such as IPSec (IP Security protocol), IPS (Intrusion Protect System), voice and wireless etc., centralized switching equipment can no longer meet the needs of these services.

To this end, consider whether it is possible to integrate the business components that complete various business functions into the basic components to form an integrated device (see Figure 1), thereby reducing the occurrence of interoperability problems and reducing maintenance and management costs, thereby providing users with better services. High service quality. Still taking switching equipment as an example, service components such as intelligent interface boards with built-in processors (CPUs) can be integrated into centralized switching equipment, allowing the software or hardware of service components to be provided by various manufacturers. In this way, on the switching equipment It can complete various business functions, so that the equipment can meet various business needs.

However, if the business components can be integrated into the basic components to form an integrated device, there must be at least a data channel and a control channel between the business components and the basic components. Correspondingly, both the service component and the basic component need to be provided with a data interface for data communication and a control interface for control information communication. Now, the data interface can be realized through the Ethernet interface provided on the business components and basic components, but currently many business components and basic components do not provide control interfaces, such as serial interfaces. The serial interface is simulated on the business component and the basic component, so as to enable the communication of control information between the two components, and then make it possible for the business component to be integrated into the basic component, so as to provide users with high-quality services. A problem that needs to be solved.

Still taking the centralized switching device as an example, the hardware structure of the centralized switching device generally only provides an Ethernet interface connected to the plugboard, and the centralized switching device and the intelligent interface board can be connected to transmit data through the Ethernet interface. The existing centralized switching equipment cannot provide a control interface, such as a serial interface, through which the host CPU of the switching equipment communicates with the independent CPU of the intelligent interface board. In order to solve this serial interface problem, the corresponding serial interface can be added to the existing centralized switching equipment, but this change requires the addition of additional hardware, causing an increase in the area of the single board and hardware cost, especially in the existing The centralized switching equipment cannot integrate the intelligent interface board. If the corresponding serial port chip needs to be added in order to integrate the intelligent interface board, the cost will be greatly increased.

Contents of the invention

An object of the present invention is to provide a method and an integrated device for simulating a serial interface on an Ethernet interface, so as to solve the problem that the serial interface is not provided on the basic component and the service component in the prior art and needs to be provided on the basic component and the service component The addition of new hardware greatly increases the cost of technical issues.

In order to achieve the above object, the present invention discloses a method for simulating a serial interface on an Ethernet interface, including the following steps: (1) the sending end first converts the control information on the serial bus into an Ethernet message, and then uses The Ethernet interface of the local end sends; (2) the receiving end first uses the Ethernet interface of the local end to receive the Ethernet message, and then converts the received Ethernet message into serial port format data to obtain control information.

The step (2) also includes: firstly, the receiving end judges whether the received Ethernet message carries serial data, and if so, performs the step of converting it into serial port format data.

In the step (1), the serial data is converted into an Ethernet message: the serial data of one or more serial port formats is filled into the data area of an Ethernet message; in the step (2), the Ethernet message is converted For serial data: restore one or more serial port format data from the data area of the Ethernet message.

When carrying multiple serial data in the serial port format in the Ethernet message, use some fields of the Ethernet message header or some data in the data area to carry the length N of the serial data or carry the length N of the serial port format The number of serial data. An identifier used to indicate that the packet carries serial data is inserted into the Ethernet packet header of the Ethernet packet.

Whether the receiving end judges whether the received Ethernet message carries serial data is specifically: the receiving end reads the data of the Ethernet message header, and if the Ethernet message header includes the identification of carrying serial data, the Ethernet Messages carry serial data.

The receiving end processes the received Ethernet packets by polling or interrupting.

A method for controlling information communication between a switching device and an intelligent interface board, comprising: (1) respectively setting an adaptation layer for converting between serial port format data and Ethernet messages on the switching device and the intelligent interface board; (2) Use the adaptation layer between the switching device and the intelligent interface board to complete the control information communication: the sending end first uses the local adaptation layer to convert the control information on the serial bus into Ethernet packets, and then uses the local Ethernet The receiving end first uses the local Ethernet interface to receive the Ethernet message, and then uses the local adaptation layer to convert the received Ethernet message into serial port format data to obtain control information.

The receiving end first judges whether the received Ethernet message carries serial data, and if so, proceeds to the step of converting it into serial port format data.

In the step (1), the serial data is converted into an Ethernet message: the serial data of one or more serial port formats is filled into the data area of an Ethernet message; in the step (2), the Ethernet message is converted For serial data: restore one or more serial port format data from the data area of the Ethernet message.

When carrying multiple serial data in the serial port format in the Ethernet message, use some fields of the Ethernet message header or some data in the data area to carry the length N of the serial data or carry the length N of the serial port format The number of serial data.

A first component that uses an analog serial interface on an Ethernet interface, the first component is a basic component, and the basic component includes an Ethernet interface, and it is characterized in that the basic component is provided with an adaptation layer , used for conversion between serial port format data and Ethernet message: converting serial data into Ethernet message: filling one or more serial data in serial port format into the data area of an Ethernet message, and Converting the Ethernet message into serial data is: restoring one or more serial port format data from the data area of the Ethernet message. The basic component also includes an Ethernet interface, which is a multiplexed Ethernet interface that transmits both data information and control information.

A second component that uses an analog serial interface on an Ethernet interface, wherein the second component is a service component, and the service component includes an Ethernet interface, and is characterized in that the service component is set An adaptation layer, used for conversion between serial port format data and Ethernet message: converting serial data into Ethernet message: filling one or more serial port format serial data into an Ethernet message In the data area, convert the Ethernet message into serial data: restore one or more serial port format data from the data area of the Ethernet message. The service component also includes an Ethernet interface, which is a multiplexed Ethernet interface that transmits both data information and control information.

The basic component is a centralized switching device, and the service component is an intelligent interface card.

Compared with the prior art, the present invention can simulate the serial interface through the Ethernet interface on the business component and the basic component through software, that is, the serial port format data on the serial bus and the Ethernet message can be set by software. Interchange, so that the communication of control information between the two components does not need to add new hardware to the basic components and business components in order to establish control communication, thereby reducing costs, especially the existing basic components can be used to build The new integrated equipment greatly reduces the cost and expenditure, and at the same time, the new integrated equipment can provide users with higher quality services, while reducing the cost of equipment management and maintenance.

Moreover, the present invention can also simulate serial interfaces on the centralized switching device and the intelligent interface board through the Ethernet interface, so that the centralized switching device and the intelligent interface board can be connected to transmit control information through the Ethernet interface, and then In addition to the traditional switching function, the integrated device composed of the centralized switching device and the intelligent interface board can also complete other functions, such as filtering and flow control.

In addition, the centralized switching device of the present invention and the intelligent interface board can be used for the docking of control information and data information through their respective Ethernet interfaces, which not only saves costs, but also enables centralized switching More intelligent interface boards are plugged into the device.

Description of drawings

Fig. 1 is a schematic frame diagram of an integrated device;

Fig. 2 is a schematic diagram of the hardware structure of an integrated device;

Fig. 3 is a schematic diagram of the position of the adaptation layer configuration on the basic component/service component of the present invention;

Fig. 4 is the schematic diagram of the first kind of realization scheme that converts between serial port format data and Ethernet message;

Fig. 5 is the schematic diagram of the second kind of realization scheme that converts between serial port format data and Ethernet message;

Fig. 6 is the flowchart of the method for simulating serial interface on Ethernet interface of the present invention;

FIG. 7 is a flowchart of a method for communicating control information between a switching device and an intelligent interface board according to the present invention.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings.

The core of the present invention is to complete the exchange between the serial port format data on the serial bus and the Ethernet message on the existing basic components and business components, thereby realizing the purpose of simulating the serial port with the network port, and then Realize the serial port communication function of basic components and business components, thereby saving hardware costs.

Please refer to FIG. 2 , which is a schematic diagram of a hardware structure of an integrated device. The integrated device includes a basic component and at least one business component.

A basic part, comprising an Ethernet interface on the said basic part, said basic part is provided with an adaptation layer, is used for converting between the serial port format data and the Ethernet message: the serial data is converted into the Ethernet message as : Fill one or more serial data in the serial port format into the data area of an Ethernet message, convert the Ethernet message into serial data: restore one or more data areas from the Ethernet message Serial port format data.

A service part, including an Ethernet interface on the service part, an adaptation layer is set on the service part, used for converting between serial port format data and Ethernet messages: converting serial data into Ethernet messages To: fill the serial data of one or more serial port formats into the data area of an Ethernet message, and convert the Ethernet message into serial data: to restore one or more serial data from the data area of the Ethernet message A serial port format data.

The first processor of the base unit and the second processor of the service unit communicate information via the Ethernet interface. An adaptation layer is respectively arranged on the basic component and the service component of the present invention, and is used for converting between the serial port format data and the Ethernet message.

Please refer to FIG. 3 , which is a schematic diagram of the configuration position of the adaptation layer on the basic component/service component of the present invention. Both the existing first processor and the second processor are usually provided with a serial interface, that is, to send data in a serial port format to the outside through the serial bus. The Ethernet interface generally refers to an Ethernet control chip provided with an Ethernet driver. The adaptation layer is provided between the serial interface and the Ethernet interface, and is used for converting the data in the format of the serial interface and the Ethernet message. Moreover, the adaptation layer of the present invention is usually realized by software.

Please refer to FIG. 4 , the serial port format data transmitted on the existing serial bus is 1-bit start bit + 8-bit serial data + 1-bit parity bit (optional) + 1-bit stop bit. In the serial bus, 1-bit start bit and 1-bit stop bit are processed by hardware, so 8-bit serial data is processed in the adaptation layer. The data format of the Ethernet packet is the Ethernet packet header + data bits + padding data + parity bits.

Convert serial data to Ethernet message: fill one or more serial port format serial data into the data area of an Ethernet message; convert Ethernet message to serial data as: from Ethernet message Restore one or more serial port format data in the data area of the file.

When the serial data in multiple serial port formats is carried in the Ethernet message, several fields of the Ethernet message header or some data bits in the data area can be used to carry the length N of the serial data or carry the serial port The number of serial data in the format. For example, when filling the serial data of 3 serial port formats into the data area of an Ethernet message, "3" can be added to a certain field of the Ethernet agreed upon by both parties or several data bits in the data area. It is also possible to set 3*8=24, and add its length 24 to a certain field or several data bits of the data area of the Ethernet agreed upon by both parties. 8 is the number of serial data in a serial port format.

In addition, an identifier used to indicate that the packet carries serial data is inserted into the Ethernet packet header of the Ethernet packet.

The conversion of Ethernet message and data in serial port format present invention just gives two kinds of embodiments. In the first embodiment, the data bits of the Ethernet message are 8 bits, and in the second embodiment, the data bits of the Ethernet message are greater than or equal to 16 bits and are multiples of 8 bits.

In the first embodiment (see also FIG. 4), the adaptation layer at the sending end converts the serial data into an Ethernet message specifically: filling an 8-bit serial data in a serial port format into an Ethernet message The data area of the Ethernet message, and fill the identifier of the serial data carried by this message into the Ethernet message header of the Ethernet message. The adaptation layer at the receiving end converts the Ethernet message into serial data: obtains an 8-bit serial data from the data area of the Ethernet message to form a serial port format data.

In the second embodiment (please refer to Figure 5), the adaptation layer at the sending end converts the serial data into an Ethernet message as follows: filling serial data in a plurality of serial port formats into the data area of an Ethernet message , and use the first 8 bits of data in the data area to carry the length of the serial data, and fill the identifier of the serial data carried by this message into the Ethernet message header of the Ethernet message. The adaptation layer at the receiving end converts the Ethernet message into serial data as follows: take the first 8-bit data from the data area of the Ethernet message to obtain the serial data length N carried, and then convert the subsequent N bits in the data area Each 8-bit data of the length composes a serial port format data. In the second embodiment, an Ethernet packet can carry multiple 8-bit data, and the first 8 bits can be used to indicate the length of the carried data. This solution can improve transmission efficiency (1500≥N≥1).

Of course, it is not limited to the above two embodiments. For example, when the adaptation layer at the sending end converts the serial data into an Ethernet message file, it fills the data area with multiple serial port format serial data, and transmits the serial data in the Ethernet file. The preset position in the message is filled with the length N of the serial data carried by the Ethernet message. The preset position can be filled in the first 8-bit data in the data area as described in the second scheme, or it can be other positions in the data area, such as the last 8-bit data. Of course, it is not necessarily 8 bits, the bytes occupied by filling the serial data length N can be determined according to the range of N. In addition, it should be noted that, in addition to filling the serial data length N in the data area, it may also be filled in other areas of the Ethernet message, such as filled data area (filled Data).

In addition, the identifier of the serial data carried by the packet is filled outside the Ethernet packet header of the Ethernet packet, and the identifier can also be filled in other areas of the Ethernet packet, such as filled data area (filledData).

The Ethernet packet header includes DMAC field, SMAC field and Proto field. The DMAC field occupies 6-Bytes and is used to indicate the destination MAC address for receiving the Ethernet message. In the present invention, it refers to the MAC address of the Ethernet interface of the basic component/service component that receives the Ethernet message. The SMAC field has a size of 6-Bytes and is used to indicate the source MAC address of the sending Ethernet message. The present invention refers to the MAC address of the Ethernet interface of the basic component/service component sending the Ethernet message. The private protocol number Proto field occupies 2-Bytes.

The basic component and the service component can send data information through other interfaces (such as another Ethernet interface), or multiplex the Ethernet interface to send both data information and control information. When there are other interfaces for sending data information, the present invention can use the source MAC address of the Ethernet message to identify that the Ethernet message is bearer control information. Certainly, the Proto field of the Ethernet packet header may also be used to identify that the Ethernet packet is bearer control information.

When the Ethernet interface is a multiplexed interface, an identifier may be used to indicate whether the Ethernet packet carries control information or carries data information. In the present invention, the Proto field of the Ethernet message header can be used to identify whether the Ethernet message bears control information or bears data information. For example, if the Proto field is "0", it indicates that the Ethernet packet is bearer control information, and if the Proto field is "1", it indicates that the Ethernet packet is bearer data information.

Please refer to FIG. 6 , which is a flow chart of the method for simulating a serial interface on an Ethernet interface according to the present invention. It is used to connect control information between the first processor of the basic component and the second processor of the service component, including the following steps:

S110: The sending end first converts the control information on the serial bus into an Ethernet message, and then uses the Ethernet interface of the local end to send it;

S120: The receiving end first uses the Ethernet interface of the local end to receive the Ethernet message, and then converts the received Ethernet message into serial port format data to obtain control information.

Each step is described in detail below.

1. Step S110

When the sending end needs to send serial data, it first fills the control information on the serial bus, and the adaptation layer of the local end converts the control information on the serial bus into an Ethernet message.

Convert serial data to Ethernet message: fill one or more serial port format serial data into the data area of an Ethernet message; convert Ethernet message to serial data as: from Ethernet message Restore one or more serial port format data in the data area of the file.

When the serial data in multiple serial port formats is carried in the Ethernet message, several fields of the Ethernet message header or some data bits in the data area can be used to carry the length N of the serial data or carry the serial port The number of serial data in the format. For example, when filling the serial data of 3 serial port formats into the data area of an Ethernet message, "3" can be added to a certain field of the Ethernet agreed upon by both parties or several data bits in the data area. It is also possible to set 3*8=24, and add its length 24 to a certain field or several data bits of the data area of the Ethernet agreed upon by both parties. 8 is the number of serial data in a serial port format.

In addition, an identifier used to indicate that the packet carries serial data is inserted into the Ethernet packet header of the Ethernet packet.

The serial data conversion can be for the Ethernet message: fill the 8-bit serial data in a serial port format into the data area of an Ethernet message, and fill the identifier of the serial data carried by this message into the Ethernet message Ethernet header of the file.

Serial data conversion can also be an Ethernet message: fill the serial data of multiple serial port formats into the data area of an Ethernet message, and use the first 8 bits of data in the data area to carry the serial data Length, fill the identifier of the serial data carried by this message into the Ethernet message header of the Ethernet message.

When there are other interfaces for sending data information, the present invention can identify that the Ethernet message is bearer control information through the source MAC address of the Ethernet message. When the Ethernet interface is a multiplexing interface, it can be identified by a To indicate whether the Ethernet packet carries control information or carries data information. In the present invention, the Proto field of the Ethernet message header can be used to identify whether the Ethernet message bears control information or bears data information.

2. Step S120

After the Ethernet interface of the receiving end receives the data, it first judges whether the Ethernet message carries serial data information, if so, sends the data to the adaptation layer, otherwise the Ethernet message can be sent to The text is directly handed over to the existing upper layer (such as the protocol stack) for processing.

Whether the receiving end judges whether the received Ethernet message carries serial data is specifically: the receiving end reads the data of the Ethernet message header, and if the Ethernet message header includes the identification of carrying serial data, the Ethernet Messages carry serial data. Of course, if the sending end and the receiving end can set an identifier on other fields in the Ethernet message except the Ethernet message header, it is used to identify the serial data carried.

The adaptation layer at the receiving end converts the Ethernet telegram into serial data. Converting an Ethernet message to serial data can also be: Converting an Ethernet message to serial data is: taking the first 8 bits of data from the data area of the Ethernet message to obtain the length of the serial data carried N, and then the data of the subsequent N length in the data area is composed of 8 bits into a serial port format data. The adaptation layer at the receiving end converts the Ethernet message into serial data in a manner corresponding to the adaptation layer at the sending end.

The receiving end processes the received Ethernet packets by polling or interrupting. If polling mode is adopted, then the adaptation layer of the receiving end fills the obtained serial port format data in a cache, as, puts the obtained serial port format data into the unprocessed serial port data queue, and the upper layer (the upper layer mainly refers to the processing string Row data application program) regularly checks the cache, that is, checks the serial port data queue to process the serial port format data. If the interrupt mode is used, the adaptation layer at the receiving end sends an interrupt request to the upper layer every time it processes an Ethernet message, and sends the obtained serial port format data to the upper layer for processing.

Through the above steps, the serial interface can be simulated by using the existing Ethernet interface, so that it is possible to connect control information between the basic component and the service component. Most importantly, the present invention does not need to add additional hardware. It can be realized on the existing basic components, which greatly reduces the cost.

The present invention will be described below by taking the smart interface card plugged into the centralized switching device as an example.

Please refer to FIG. 7 , which is a flowchart of a method for communicating control information between a switching device and an intelligent interface board according to the present invention. It includes the following steps:

S210: Setting adaptation layers for converting between serial port format data and Ethernet packets on the switching device and the intelligent interface board respectively.

S220: Use the adaptation layer to complete control information communication between the switching device and the intelligent interface board:

The sending end first converts the control information on the serial bus into an Ethernet message by using the adaptation layer of the local end, and then sends it by using the Ethernet interface of the local end (S310);

The receiving end first uses the Ethernet interface of the local end to receive the Ethernet message, and then uses the adaptation layer of the local end to convert the received Ethernet message into serial port format data to obtain control information (S320).

The receiving end first judges whether the received Ethernet message carries serial data, and if so, proceeds to the step of converting it into serial port format data.

Converting the serial data into an Ethernet message is as follows: filling an 8-bit serial data in a serial port format into the data area of an Ethernet message, and filling the identifier of the serial data carried by this message into the Ethernet message The Ethernet message header of the text; converting the Ethernet message into serial data is: obtaining an 8-bit serial data from the data area of the Ethernet message to form a serial port format data.

Convert serial data to Ethernet message: fill multiple serial port format serial data into the data area of an Ethernet message, and use the first 8 bits of data in the data area to carry the length of the serial data , fill the identifier of the serial data carried by this message into the Ethernet message header of the Ethernet message; convert the Ethernet message into serial data: take the first one from the data area of the Ethernet message 8-bit data to obtain the carried serial data length N, and then form a serial port format data with each 8-bit subsequent N-length data in the data area.

The basic component and the service component can send data information through other interfaces (such as another Ethernet interface), or multiplex the Ethernet interface to send both data information and control information. When there are other interfaces for sending data information, the present invention can use the source MAC address of the Ethernet message to identify that the Ethernet message is bearer control information. Certainly, the Proto field of the Ethernet packet header may also be used to identify that the Ethernet packet is bearer control information. When the Ethernet interface is a multiplexed interface, an identifier may be used to indicate whether the Ethernet packet carries control information or carries data information. In the present invention, the Proto field of the Ethernet message header can be used to identify whether the Ethernet message bears control information or bears data information. For example, if the Proto field is "0", it indicates that the Ethernet packet is bearer control information, and if the Proto field is "1", it indicates that the Ethernet packet is bearer data information.

Through the above steps, the switching device can realize not only the switching and routing functions, but also other functions. For example, if the intelligent interface board is intelligent with filtering function, then the switching device of the present invention also has the filtering function.

The above disclosures are only a few specific embodiments of the present invention, but the present invention is not limited thereto, and any changes conceivable by those skilled in the art should fall within the protection scope of the present invention.

Claims (5)

1. carry out the control information method for communicating between switching equipment and the intelligent interface board, it is characterized in that, comprising: the Ethernet interface by separately between described switching equipment and the intelligent interface board is used for docking of control information and data message;

(1) in the adaptation layer that is provided for respectively on switching equipment and the intelligent interface board changing between serial ports formatted data and the Ethernet message;

(2) utilize adaptation layer to finish control information communication between switching equipment and the intelligent interface board:

Transmitting terminal utilizes the adaptation layer of local terminal that the control information on the universal serial bus is converted to the Ethernet message earlier, utilizes the Ethernet interface of local terminal to send again;

Receiving terminal utilizes the Ethernet interface of local terminal to receive the Ethernet message earlier, judge whether the Ethernet message that receives carries serial data, if utilize the adaptation layer of local terminal that the Ethernet message that receives is converted to the serial ports formatted data again, to obtain control information.

2. the method for claim 1 is characterized in that,

In the step (1) serial data being converted to the Ethernet message is: the data field that the serial data of one or more serial ports forms is filled into an Ethernet message;

In the step (2) the Ethernet message being converted to serial data is: restore one or more serial ports formatted data from the data field of Ethernet message.

3. method as claimed in claim 2, it is characterized in that, when the serial data of a plurality of serial ports forms of carrying in the Ethernet message, utilize the plurality of data of some fields of Ethernet heading or data field to carry the length N of described serial data or carry the number of the serial data of described serial ports form.

4. first parts of using analogue Ethernet interface analogue series, it is characterized in that, described first parts are basic components, comprise an Ethernet interface on the described basic components, it is characterized in that, described basic components are provided with an adaptation layer, be used for changing between serial ports formatted data and the Ethernet message: serial data is converted to the Ethernet message is: the serial data of one or more serial ports forms is filled into the data field of an Ethernet message, the Ethernet message is converted to serial data is: restore one or more serial ports formatted data from the data field of Ethernet message;

Described Ethernet interface is the not only multiplexing Ethernet interface of data information but also communicating control information.

5. second parts of using analogue Ethernet interface analogue series, it is characterized in that, described second parts are business components, comprise an Ethernet interface on the described business components, it is characterized in that, one adaptation layer is set on the described business components, be used for changing between serial ports formatted data and the Ethernet message: serial data is converted to the Ethernet message is: the serial data of one or more serial ports forms is filled into the data field of an Ethernet message, the Ethernet message is converted to serial data is: restore one or more serial ports formatted data from the data field of Ethernet message;

Described Ethernet interface is the not only multiplexing Ethernet interface of data information but also communicating control information.

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