KR20090004239A - Method and apparatus for registering network information - Google Patents

Abstract

A method for registering network information and an apparatus therefor are provided to link a network information registering device with a network information transmitting device quickly and conveniently by using the discovery protocol, although network information of the network information transmitting device is changed. An apparatus for registering network information starts the UDP/IP packet listening to transceive messages from a specific network port. The network information registering device checks network information of the network information transmitting device, and then generates a discovery request message for requesting the network information of the network information transmitting device when the network information is changed. And then, the network information registering device broadcasts the discovery request message to the network information transmitting device.

Description

Method and device for registering network information {Method and Apparatus for Registering Network Information}

The present invention relates to a method and apparatus for registering network information such as an Internet Protocol address, a connection port, and the like. More particularly, the present invention relates to a network in which a network information registration apparatus changes network information by using a discovery protocol. The present invention relates to a network information registration method and an apparatus capable of interlocking a network information registration device and a network information transmission device more quickly and conveniently by finding and registering an information transmission device.

Devices interworking on a network have network information such as a unique IP address and a connection port for each device. Each of the devices is interworked based on this network information. Therefore, network information of devices interworking on the network (hereinafter referred to as network information transmission device) should be registered with a device that operates it (hereinafter referred to as network information registration device).

However, in the system based on Dynamic Host Configuration Protocol (DHCP), the network information of each network information transmitting device and network information registering device changes every time the DHCP server assigns a new IP address. The device will be disconnected. Therefore, in order for the network information registering apparatus to continuously operate the network information transmitting apparatus, the network information of the network information transmitting apparatus having the changed IP address must be re-registered.

Conventionally, when network information of a network information transmitting device is changed, the administrator has to check directly and register the changed network information in the network information registration device. Therefore, as the number of network information transmitting devices increases, the number of devices for which an administrator must manually re-register network information has a problem of increasing.

In addition, when the administrator inputs the network information of the network information transmitting apparatus one by one, there is a problem that a malfunction may occur by incorrectly inputting the network information.

The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is that the network information registration device automatically uses the discovery protocol even if the network information of the network information transmission device is changed. It is to provide a network information registration method and apparatus for finding and registering network information.

For this purpose, the network information registration method according to the present invention is a network information registration method of a network information registration device that executes operation of at least one network information transmission device connected on a network, the method comprising: a) network information of the network information transmission device; Checking and if the network information of the at least one network information transmitting device is changed, transmitting a discovery request message for requesting the changed network information of the network information transmitting device to the network information transmitting device; b) receiving a discovery response message including the changed network information from the network information transmitting device; And c) extracting the changed network information from the received response message and maintaining the connection of the network information transmitting apparatus whose network information has been changed using the extracted network information.

The network information registration device according to the present invention is a network information registration device that executes at least one network information transmission device connected on a network, and includes at least one code for requesting changed network information of the at least one network information transmission device. A request message generator for generating a discovery request message comprising a; A request message transmitter for transmitting the discovery request message to the at least one network transmitter in a broadcast manner; A response message receiver configured to receive a discovery response message including changed network information corresponding to the network information request code; And a network information registration unit which registers the changed network information and maintains the connection of the network information transmitting apparatus whose network information has been changed.

According to the present invention, the network information registration method and apparatus may use the discovery protocol even when network information such as an IP (Internet Protocol) address, a connection port, etc. of the network information transmitting apparatus is changed due to the operation of the Dynamic Host Configuration Protocol (DHCP). The network information registering device and the network information transmitting device can be interlocked more quickly and conveniently.

In addition, according to the present invention, the network information registration method and apparatus automatically registers the network information transmitting apparatus with the network information registering apparatus using the discovery protocol, thereby preventing a malfunction of the system that may occur in the process of the administrator inputting the network information. There is an effect that can be prevented.

In addition, according to the present invention, the network information registration method and apparatus has an effect of performing the role of NMS (Network Management System) to check the existence of the network host using the discovery protocol.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments. For reference, in the following description, detailed descriptions of well-known functions and configurations that may unnecessarily obscure the subject matter of the present invention are omitted.

1 is a block diagram of a network information registration system according to the present invention. Referring to FIG. 1, the network information registration system 100 according to the present invention includes a network information registration device 110 and a plurality of network information transmission devices 120.

The network information registering apparatus 110 includes a request message generating unit 112, a request message transmitting unit 114, a response message receiving unit 116, and a network information registering unit 118, and each network information transmitting apparatus 120. Includes a request message receiver 122, a response message generator 124, a network information storage 126, and a response message transmitter 128, respectively.

First, the network information registration apparatus 110 will be described. The request message generating unit 112 of the network information registration device 110 checks the network information of each network information transmitting device 120 and finds that the network information of the at least one network information transmitting device 120 has been changed. Based on the discovery protocol, a discovery request message for requesting network information of the network information transmitting device 120 is generated. In this case, the discovery request message generated based on the discovery protocol and the discovery protocol will be described in more detail with reference to FIGS. 2 and 3.

The request message transmitter 114 transmits the discovery request message generated by the request message generator 112 to the network information transmitter 120. Here, the request message transmitter 114 may broadcast the message through UDP / IP (User Datagram Protocol / Internet Protocol).

For example, a device that operates in real time such as a DVR (Digital Video Recorder) requires high-speed data transmission, and therefore uses UDP / IP, which has a higher transmission speed than Transmission Control Protocol / Internet Protocol (TCP / IP). It is desirable to. In the case of a device operating by DHCP, when the network information (IP address, connection port, etc.) is changed by the operation of DHCP, the discovery request message is broadcast because it is not linked with the network information registration device. Do.

Hereinafter, referring to the network information transmitting device 120, the request message receiver 122 receives a discovery request message transmitted by the request message transmitter 114. The response message generator 124 stores the IP address of the network information registration device 110 included in the discovery request message received by the request message receiver 122 in the network information storage unit 126. The network information storage device 126 extracts network information of the network information transmitting apparatus 120 to generate a discovery response message. The discovery response message generated at this time will be described in more detail with reference to FIG. 4 to be described later.

The network information storage unit 126 may be a network such as system information of the network information transmitting device 120, network property information of the network information transmitting device 120, and server information managing network connection of the network information transmitting device 120. Information and network information of the device 110 is stored.

The response message transmitter 128 transmits the discovery response message based on the IP address of the network information registration device 110 stored in the network information storage unit 126. In this case, the response message transmitter 128 may transmit the discovery response message by unicasting.

Thereafter, the response message receiving unit 116 of the network information registering device 110 receives the discovery response message transmitted by the network information transmitting device 120. The network information registration unit 118 registers the changed network information of the network information transmitting device included in the discovery response message. In this case, the network information registration unit 118 determines whether the received message is a response message to the discovery request message transmitted by the network information register 118, and registers only network information of the response message related to the discovery request message transmitted by the network information register 118.

Due to this process, the network information registration device 110 may register the network information of the changed network information transmission device 120 and interwork with the corresponding network information transmission device 120.

Hereinafter, the discovery protocol will be described in more detail with reference to FIG. 2. Numerals or letters in parentheses in the drawings indicate the length of the corresponding field.

The discovery protocol includes an OP (OPeration) code field, a spare field, a time information field, a source IP address field, a message matching field and a network information field.

The OP code field is a field in which a method of processing a received message is designated. For example, a message having '1' stored in a 1 byte OP code field may be processed as a discovery request message, and a message having '2' stored in the OP code field may be processed as a discovery response message.

The reserved field is a reserved field for use when extending the discovery protocol, and may be formed, for example, in 1 byte.

The time information field is a field for storing information on a time when the network information registration device 110 generates or transmits a discovery request message, and may be formed of, for example, 2 bytes.

The source IP address field is a field in which an IP address of the network information registration device 110 or the network information transmission device 120 is stored. For example, the source IP address field may have a length of 4 bytes.

For example, when the network information registration device 110 transmits a discovery request message by storing its IP address in the source IP address field, the network information storage unit 126 of the network information transmission device 120 may transmit the discovery request message. The IP address of the network information registration device stored in the source IP address field of the storage device, the response message generator 124 generates a discovery response message by storing the IP address of the network information transmitting device 120 in the source IP address field It may be transmitted to the network information registration device 110. Accordingly, since the network information registration device 110 may also receive network information of the network information transmission device 120 on another network, the network information registration device 110 may also perform a role of NMS (Network Management System) for checking the existence of a network host.

The message matching field is a field for storing a means for matching whether the received message is a response message to the request message, and may be formed of, for example, 4 bytes. As the means, the random message selected by the network information registration device 110 may be stored in the message matching field.

For example, the request message generator 112 of the network information registration device 110 may generate a discovery request message by storing a random number having a predetermined length in the message matching field. Thereafter, when the request message transmitter 114 transmits the message, the request message generator 124 of the network information transmitter 120 is stored in the message matching field of the discovery request message transmitted from the request message receiver 122. Copies a random number to generate a discovery response message. When the response message reception unit 126 of the network information registration device 110 receives the response message generated as described above, the network information registration unit 128 stores the random number stored in the message matching field of the discovery request message and the message of the discovery response message. The random number stored in the matching field may be checked to register network information included in the discovery response message only in the same case.

The network information field includes a network code corresponding to the network information of the network information transmitting device 120, and is a field in which network information corresponding to the network code is stored and may be formed in a variable length. . Hereinafter, an embodiment of the network code will be described in more detail with reference to Table 1.

Network code Length Description 0x01 2 System model 0x02 2 System version 0x03 2 System ID 0x04 Var System name 0x11 4 Network IP Address 0x12 4 Network Gateway Address 0x13 4 Network subnet mask 0x14 4 Network IP Mask 0x15 4 Server Address 0x16 2 Connection Port Number 0x17 One Network Boot Type (Static, DHCP, xDSL) 0x18 6 MAC address 0x19 Var xDSL ID 0x1A Var xDSL PASSWORD 0x1B Var Mail server host name

TABLE 1

Referring to Table 1, a plurality of network codes are stored in a network information field. Each network code has a meaning corresponding to the network information, and has a different code length according to the meaning.

The network information includes system information of a network information transmitter, network attribute information of the network information transmitter, and server information for managing a network connection of the network information transmitter.

The system information includes at least one of a system model, a system version, a system ID, and a system name. In addition, the network attribute information includes a network IP address, and includes a network gateway address, a network subnet mask, a network IP mask, and a connected port number. connection port number). In addition, the server information indicates a server address.

In addition, as network information, the network interworking method (for example, Static, DHCP, x Digital Subscriber Line (hereinafter referred to as xDSL), etc.), MAC (Media Access Control) address, xDSL ID, xDSL password, the name of the mail server host At least one.

The network information field may include a 2-byte code indicating the start of the network information field. Here, the code indicating the start of the network information field is a code in which 1 byte of '0xAA' code and 1 byte of network code are stored (for example, '0x0F' if the number of network codes is 15 and '0x38' if 56). It may include.

The network information field may include a 2-byte code indicating the end of the network information field. Here, the code indicating the end of the network information field may include a '0xFF' code of 1 byte and a code '0x00' reserved for extending the network information field of 1 byte.

3 is an exemplary diagram illustrating a discovery request message according to the present invention. Referring to the figure, a code '1' for storing the message as a discovery request message is stored in the OP code field. Hereinafter, detailed descriptions of the reserved field, the time information field, the source IP address field, and the message matching field will be omitted since they may obscure the subject matter of the present invention.

The network information field includes a '0xAA' code (a) indicating the start of the network information field and a '0x0F' code (b) indicating the number of network codes (0x01 to 0x1B). In addition, a '0xFF' code (c) indicating the end of the network information field and a '0x00' code (d) reserved for expansion of the network information field are included, and padding '0x00' is included in the configuration of the discovery request message. 'Code (e) is included. Here, the added code (e) is not necessary when the length of the network information field corresponds to a multiple of four.

The network codes 0x01 to 0x1B selected by the user are stored to request network information of the device that has received the discovery request message (see Table 1).

Referring to FIG. 1, the request message generator 114 of the network information registration device 110 stores a '1' in an OP code field and a current time in a time information field. The IP address is stored in the source IP address field, and a random number having a length of 4 bytes is selected and stored in the message matching field. The network code corresponding to the changed network information (system information, network attribute information, etc.) may be stored in the network information field to generate a discovery request message for requesting network information of the network information transmitting device 120.

The network information transmitting device 120 receiving the discovery request message generated through the above process generates a discovery response message based on the discovery request message.

Hereinafter, an example of a discovery response message according to the present invention will be described in more detail with reference to FIG. 4. Referring to the figure, a code '2' to store the message as a discovery response message is stored in the OP code field.

The network information field includes a '0xAA' code (a) indicating the start of the network information field and a '0x38' code (b) indicating the number of network codes (0x01 to 0x8D) included in the network information field. A '0xFF' code (c) indicating the end of the field and a '0x00' code (d) reserved for expansion of the network information field are included. In the network information field, the network information of the network information transmitter 120 corresponding to each network code ①, ②, ③, ...,, and the lengths of the network information ⓐ, ⓑ, ⓒ,... , Ⓚ).

In FIG. 4, the model of the network information transmitting apparatus 120 corresponding to the code '0x01' ① is '0x80', and the code length ⓐ is 2 bytes. The version of the network information transmitter corresponding to the code '0x02' is '1.1', and the code length ⓑ is 2 bytes. On the other hand, the ID of the network information transmitting apparatus corresponding to the code '0x03' ③ cannot respond, and the allocated code length ⓒ is 2 bytes. The name of the network information transmitting apparatus corresponding to the code '0x04' is 'DVR' and the code length ⓓ is 3 bytes. The IP address of the network information transmitter corresponding to the code '0x11' is '192.168.11.25', and the code length ⓔ is 4 bytes. The gateway address of the network information transmitter corresponding to the code '0x12' (⑥) is '192.168.11.1', and the code length (ⓕ) is 4 bytes. Indicates. The subnet mask of the network information transmitting apparatus corresponding to the code '0x13' (⑦) is '255.255.255.255', and the code length (ⓖ) is 4 bytes. The IP mask corresponding to '0x14' code (8) is '255.255.255.0', and the code length (ⓗ) is 4 bytes. The connection port of the network information transmitting apparatus corresponding to the code '0x16' is '0x0A96 2710', and the code length ⓘ is 2 bytes. The network interworking method (Static, DHCP, xDSL, etc.) of the network information transmitting apparatus corresponding to the code '0x17' corresponds to the second scheme preset in the network information registering apparatus 110, and the length of the code Indicates that it is 1 byte. The MAC address of the network information transmitter corresponding to the code '0x18' is '00 -03-4E-80-01-8D ', and the length of the code is 6 bytes. Accordingly, the network information registration device 110 receiving the discovery response message including the network information field may register with the network information to interwork with the network information transmission device 120.

As an example, referring to FIG. 1, the network information storage unit 126 of the network information transmitter 120 that receives the discovery request message through the request message receiver 122 may include a source IP address field included in the discovery request message. The network information registering apparatus 110 stores the random number selected by the network information registering apparatus 110 stored in the IP address and message matching field of the network information registering apparatus 110 stored in FIG.

The response message generator 124 stores '2' in the OP code field and copies the message matching field of the discovery request message. Subsequently, the network information storage unit stores only the IP address of the network information transmitter 120 in the source IP field, and the network information corresponding to the network code stored in the network information field of the discovery request message in the network information field. Extracted at 126 to add to generate a discovery response message.

Therefore, the network information registration device 110 receiving the discovery request message may determine whether the received message is a response message to the discovery request message transmitted by the network information registration device based on the message matching field, and according to the determined result By registering the network information of the network information transmission device 120 stored in the field, the network information registration device 110 and the network information transmission device 120 is interlocked.

5 is a diagram illustrating an example in which a network information registration system according to the present invention is implemented on a network, and FIG. 6 is a diagram illustrating an example in which the network information registration system according to the present invention interworks with devices of another network. .

First, referring to FIG. 5, the network information registration system 500 includes a plurality of network information transmission devices 510, 520, and 530, a storage device 540, a network information registration device 550, and a gateway 580.

In the network information registration system 500 according to the present invention, 254 devices may be interworked through a 'c' class network. Accordingly, the network information registration device 550 cooperates with 251 network information transmission devices by registering network information of each of the network information transmission devices 510, 520, 530, the storage device 570, and the gateway 580. Can be.

Here, the network information registration device 550 may transmit a discovery request message to the first, second, and nth network information transmitting devices 510, 520, and 530 by broadcasting. Each of the network information transmitting apparatuses 510, 520, and 530 generates a discovery response message in response to the received discovery request message, and then transmits the discovery response message to the network information registration apparatus 550 by unicasting. Can be sent to.

On the other hand, when there is a need to interwork with a larger number of network information transmission apparatuses, the gateway 580 acts as a relay server, so that the network information registration apparatus 550 is a device on another network. You can also work with.

As an example, in FIG. 6, the network information registration device 620 interacts with the second gateway 644 through the first gateway 642 serving as a relay server, thereby providing first-first, first-second, and first-th ones. In addition to the 1-n network information transmitting apparatuses 611, 612, and 613, the present invention also works with the 2-1, 2-2, and 2-m network information transmitting apparatuses 614, 615, 616. (n and m are natural numbers).

As such, the network information registration device 620 may be extended with the network information registration system by interworking with devices on other networks through the gateways 642 and 644. In addition, the discovery protocol may serve as a NMS (Network Management System) to check the existence of the network host.

In addition, each of the network information transmitting apparatuses 611 to 616 may be configured to perform a function of the network information registering apparatus 620 by mounting an application.

7 is a signal flow diagram illustrating a network information registration process according to the present invention, and FIG. 8 is a flow chart illustrating an information retrieval method illustrating the network information registration method according to the present invention.

First, the network information registering apparatus 700 and the network information transmitting apparatuses 710 and 720 start UDP / IP packet listening to transmit and receive a message from a specific network port. Thereafter, the network information registering apparatus 700 checks network information of the network information transmitting apparatuses 710 and 720, and when the network information is changed, a discovery request for requesting network information of the network information transmitting apparatuses 710 and 720. The discovery is started by generating a message (S800). The discovery request message is broadcast to the first network information transmitting device 710 and the second network information transmitting device 720 (S810). Response message generators of the network information transmitting apparatuses 710 and 720 that receive the discovery request message select a method of processing the received message based on the OP code field, and copy the message matching field of the discovery request message. Subsequently, the first and second discovery response messages are generated by extracting each changed network information according to the network code included in the network information field of the discovery request message (S820). Thereafter, the response message transmitters of the network information transmitters 710 and 720 transmit the discovery response message to the network information registration apparatus 700, and the time required for the network information transmitters 710 and 720 is transmitted. The performance may vary.

After the network information registration device 700 transmits a discovery request message, a predetermined time (for example, a maximum time required when no abnormality occurs in the network information transmitting devices 710 and 720) passes. The discovery is completed by registering network information included in the received first and second discovery response messages (S830). In this case, it is preferable to ignore the discovery response message received before the discovery request message is transmitted and after the discovery is completed.

Finally, the network information registration method according to the present invention can be implemented as a computer program. Codes and code segments constituting a program based on the algorithm disclosed in the network information registration method can be easily inferred by a computer programmer in the art. Such a network information registration program is stored in a computer-readable recording medium, and may be read and executed by a computer.

In addition, the above-described functions of the different devices or units may be selectively integrated with one or more modules to configure the network information registration apparatus according to the present invention.

Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art to which the present invention pertains can implement the present invention in other specific forms without changing the technical spirit or essential features, The examples are to be understood in all respects as illustrative and not restrictive.

In addition, the scope of the present invention is specified by the appended claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts are within the scope of the present invention. It should be interpreted as being included.

1 is a block diagram of a network information registration system according to the present invention.

2 is a diagram illustrating a discovery protocol according to the present invention.

3 is an exemplary diagram illustrating a discovery request message according to the present invention.

4 is an exemplary view illustrating a discovery response message according to the present invention.

5 is a diagram illustrating an example of a network information registration system implemented on a network.

6 is a diagram illustrating an example in which the network information registration system according to the present invention interworks with devices of another network.

7 is a signal flow diagram illustrating a network information registration process according to the present invention.

8 is a flowchart illustrating an information retrieval method showing a network information registration method according to the present invention.

Explanation of symbols on the main parts of the drawings

100: network information registration system 110: network information registration device

112: request message generator 114: request message transmitter

116: response message receiver 118: network information register

120: network information transmitter 122: request message receiver

124: response message generator 126: network information storage unit

128: response message transmitter

Claims (16)

A network information registration method of a network information registration device that executes at least one network information transmission device connected on a network, the method comprising: a) when the network information of the at least one network information transmitter is changed by checking network information of the network information transmitter, a discovery request message requesting the changed network information of the network information transmitter is sent to the network information transmitter; Transmitting; b) receiving a discovery response message including the changed network information from the network information transmitting device; And c) extracting the changed network information from the received response message, and maintaining the connection of the network information transmitting apparatus whose network information has been changed by using the extracted network information. The method of claim 1, wherein step a) And transmitting a discovery request message to the network information transmitting device before receiving the change of the network information from the network information transmitting device. The method of claim 1, wherein the discovery request message is An OP (OPeration) code field in which a manner of processing the discovery request message is specified; A source IP address field including an IP address of the network information registering device; A message matching field storing a random number for determining whether the discovery response message is a response message to the discovery request message; And Network information registration method characterized in that it comprises a network information field stored in the requested network code. The method of claim 1, wherein the discovery response message An OP code field in which a manner of processing the discovery response message is specified; A source IP address field including an IP address of the network information transmitting device; A message matching field storing a random number for determining whether the discovery response message is a response message to the discovery request message; And And a network information field in which the changed network information is stored. The method of claim 1 or 3, wherein the request message is At least one of a code for requesting network properties of the network information transmitting apparatus, a code for requesting system information of the network information transmitting apparatus, and a code for requesting server information for managing a network connection of the network information transmitting apparatus. The network information registration method further comprises. 6. The code of claim 5, wherein the code for requesting the network property is Among the network IP address code, network gateway address code, network subnet mask code, network IP mask code, and connection port number code Network information registration method characterized in that it comprises at least one code. The system of claim 5, wherein the code for requesting system information is And at least one of a system model code, a system version code, a system ID code, and a system name code. The method of claim 5, wherein the request message And a code for requesting at least one of a network interworking method (xDSL), a MAC (Media Access Control) address, an xDSL ID, an xDSL password, and a name of a mail server host. The method of claim 4, wherein the network information field is And a code indicating a start of the network information field and a code indicating an end of the network information field. The method of claim 1, wherein step b) Receiving the discovery request message and extracting changed network information based on the request message; Generating a discovery response message including the changed network information and transmitting the discovery response message to the network information registration device; And And receiving a discovery response message including the changed network information. A network information registration device for executing an operation of at least one network information transmitter connected on a network, A request message generator configured to generate a discovery request message including at least one code for requesting changed network information of the at least one network information transmitter; A request message transmitter for transmitting the discovery request message to the at least one network transmitter in a broadcast manner; A response message receiver configured to receive a discovery response message including changed network information corresponding to the network information request code; And And a network information registration unit which registers the changed network information and maintains the connection of the network information transmitting apparatus whose network information has been changed. The method of claim 11, wherein the code is At least one of a code for requesting network properties of the network information transmitting apparatus, a code for requesting system information of the network information transmitting apparatus, and a code for requesting server information for managing a network connection of the network information transmitting apparatus. Network information registration device further comprises a code. The method of claim 12, wherein the code for requesting a network property is Among the network IP address code, network gateway address code, network subnet mask code, network IP mask code, and connection port number code Network information registration device comprising at least one code. 13. The system of claim 12, wherein the code for requesting system information is And at least one of a system model code, a system version code, a system ID code, and a system name code. 12. The method of claim 11 wherein the request message is And a code for requesting information of at least one of a network interworking method (xDSL), a MAC (Media Access Control) address, an xDSL ID, an xDSL password, and a name of a mail server host. 12. The method of claim 11, wherein the response message And a code indicating a start of the network information and a code indicating an end of the network information.

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