KR100507130B1 - Apparatus for bridging between Simple Network Management Protocol agent and Universal Plug and Paly Control Point, and Method for the same - Google Patents

Abstract

The present invention relates to an SNMP agent and a bridge device of a UPnP CP and a method thereof, which can monitor or control SNMP agents through a UPnP control device in a home without using an SNMP manager, and an action used in UPnP. By combining the tag and event tag, UPnP CP can call up and monitor the management object pre-stored in the SNMP agent, and set the parameter and request action to change the specific SNMP agent. Set or change the managed object parameters to control the SNMP agent.

Description

Bridge device between SNP agent and GPNP control device and its method {Apparatus for bridging between Simple Network Management Protocol agent and Universal Plug and Paly Control Point, and Method for the same}

The present invention combines an action tag and an event tag used in UPnP (Universal Plug and Play, hereinafter abbreviated as " UPnP ") to store a management object pre-stored in an SNMP agent. To abbreviate "UPnP CP" for monitoring, and to control or control the SNMP agent by setting or changing the managed object parameter of a specific SNMP agent through parameter setting and query action. An SNMP agent and a UPnP CP bridge device and a method thereof.

In general, the Simple Network Management Protocol (SNMP) is an Internet Engineering Task Force (IETF) that is responsible for the development of Internet protocols to exchange management information elements (hereinafter referred to as "MIBs") between managers and network equipment. As a network management protocol developed by), it is a protocol that enables network equipment to be managed from outside.

FIG. 1 is a diagram illustrating a system to which SNMP is applied in which basic commands such as Get, Get next, set, trap, and the like are used to enable such external management. 100 and the SNMP agent 110, the SNMP manager 100 in this system is configured for each system, slot and board of the radio interface unit (RIU: Radio Interface Unit) from the SNMP agent (110) In addition to the status information, management information such as performance and fault information is managed through the basic commands such as Get, Get next, set, and trap.

On the other hand, with the recent development of information technology, various devices such as mobile phones, digital TVs, PDAs, and game consoles are connected to one network, and home network technology is in the spotlight as the network environment spreads into the home.

The home network technology described above refers to an environment in which devices in a home are connected to a single network to enable them to share each other's digital data and enable broadband communication. It means wireless network equipment itself, and broadly encompasses not only the equipment but also middleware and services for integration / control / operation between home network devices.

Among these home networks, in particular, the home network to which UPnP is applied as middleware is a home network controlled device in the home, for example, the UPnP refrigerator 200, the UPnP washing machine 201, and the home network controller, for example, as shown in FIG. 2. Digital TV (DTV) 210 is connected by a single topology, and these home network devices are sometimes connected to an Internet service provider (ISP) through a home gateway to connect various Internet services. To be provided.

Referring to the home network operation process of the UPnP configured as described above, that is, the operation process between the home network controller and the home network controlled device as follows.

First, a home network controlled device and a home network controller in a home are assigned a home IP (Internet Protocol) address from a Dynamic Host Configuration Protocol (DHCP) server.

Then, UUID (Unique Universal Identifier) data and device information, such as product name, model name or serial number, are transferred to the home network control device by using the home IP address assigned by the home network controlled devices. When multicasting, the home network controller discovers and recognizes the home network controlled devices connected to it through the multicasted information, and then provides each home network controlled device with a service, that is, a specific function that it can provide. Information indicating, for example, event information or control information indicating the current state of the devices themselves are requested.

In response to this request, each home network controlled device transmits information about a service it can provide to the home network control device, and the home network controller uses the information about the transmitted service to control the operation of the home network devices. Control.

When the current state of each home network controlled device according to the control of the home network controlling device, that is, an event occurs, the corresponding home network controlled device transmits the changed state information to the home network controlling device so that the control device Respond according to their event status.

Finally, the home network control device displays the function description information or event information of each home network controlled device to the user through the corresponding UI (User Interface) device. This display operation is provided as an optional function in the home network. .

Through the above-described series of operations, the user using the controller in the home network can be provided with a service for observing a change in the status of various home network controlled devices and controlling each home network device accordingly. In such a UPnP home network, a corresponding control device can control only a specific UPnP device that supports UPnP applications, and there is no technology for monitoring or controlling an SNMP agent that is not supported by UPnP.

Therefore, in order to monitor and control SNMP that does not support UPnP using UPnP, which is used as a home network middleware, an interworking device called a bridge is required.

Accordingly, the present invention has been developed in accordance with the above-described needs, bridge device and method of the SNMP agent and UPnP CP to monitor or control the SNMP agents through the UPnP control device in the home, without using a separate SNMP manager It is about.

Hereinafter, the present invention will be described with reference to the accompanying drawings.

First, FIG. 3 is a view illustrating an embodiment of a system to which a bridge device of the present invention is applied. As shown in FIG. 3, the bridge device of the present invention is connected to a plurality of SNMP agents and UPnP CPs to form a single topology. In this case, in particular, the problem that the bridge device of the present invention is recognized as one UPnP device under the control of the UPnP CP should be solved first.

To this end, the "UPnP Application" should be basically mounted on the TCP / IP layer included in the real-time OS (RTOS) operating system in the bridge device of the present invention. .

As shown in FIG. 4, the "UPnP application" is composed of a Dynamic Host Configuration Protocol (DHCP) processing module, a device search processing module, a service recognition processing module, and an event processing module.

The DHCP processing module is a module for managing its own IP address (symmetrical with "local IP") assigned from a DHCP server. UPnP is also based on TCP / IP, and each device has its own local IP. Through this module, the bridge device of the present invention is recognized as one UPnP device having a specific local IP.

When the UPnP devices are connected to the home network, the device search module is a module that allows the UPnP device to advertise its presence to the UPnP CP so that the UPnP CP can recognize the specific UPnP device. The bridge device can inform the UPnP CP of its existence, and the UPnP CP can recognize the UPnP CP as one UPnP device capable of controlling the bridge device through this information.

In addition, the service recognition processing module is a module for recognizing various service functions provided by the device through a description file provided by the device recognized by the device search module, and the description file largely contains detailed information of each device model. The device description file is generally classified into a service description file and a service description file indicating a service function of the device. Through such a module, the UPnP CP can recognize the service of the bridge device according to the present invention.

 Lastly, the event processing module is a module for informing the current state of each UPnP device, and the presentation processing module is a module for presenting various service functions provided by the UPnP device to the user. Provided as an option in the specification.

As described above, in order for the bridge device of the present invention to operate as one UPnP device, the above-described UPnP application must be basically loaded on its basic TCP / IP layer, and the present invention is established on the premise that the UPnP application is mounted. .

Hereinafter, a first embodiment of the bridge device according to the present invention, which is applied to the above-described system based on such a premise, will be described with reference to FIG. 5.

<First Embodiment>

The first embodiment relates to a device for monitoring the SNMP agent and the management object stored in the bridge device UPnP CP.

First, as shown in FIG. 5, the first embodiment of the bridge apparatus according to the present invention includes a data input / output module 500 for inputting / outputting network stream data in a predetermined data transmission unit with a UPnP CP and an SNMP agent. An agent detection module 510 for detecting a specific SNMP agent identifier predefined and transmitted in a management object request stream transmitted from the UPnP CP through the data input / output module 500, and the agent detection module 510. A MIB management module 520 for searching for and outputting a corresponding management object of the SNMP agent corresponding to the identifier detected by the pre-stored MIB tree, and a MIB storage module for storing the MIB tree in which the management object is recorded for each SNMP agent; 530 and a protocol for converting a corresponding management object of a specific SNMP agent output from the MIB management module 520 into a predefined attribute tag format. A conversion module 540 and the converted attribute tag in a specific tag of SCPD (Service Control Protocol Definition) matched with the management object to output to the UPnP CP through the data input / output module 500. SCPD message generation module 550.

In the first embodiment of the present invention, the data input / output module 500 first interfaces the network stream data with each UPnP CP and SNMP agent in a predetermined data transmission unit. That is, when transmitting data with the UPnP CP, parsing and packaging is performed using a data transmission unit defined by UPnP, which is middleware, and when transmitting data with the SNMP agent, parsing with a data transmission unit (PDU) defined by SNMP. And package it.

The address of the bridge device according to the present invention used at the time of the interface is to use a specific local IP (LIP) which is a private address set in a DHCP processing module (not shown).

Next, when the data input / output module 500 parses the management object request stream transmitted from the UPnP CP in a predetermined data transmission unit, the agent detection module 510 parses the data input / output module 500. The result is read and the SNMP agent identifier recorded in a specific field of the stream header is detected.

Preferably, the SNMP agent identifier uses one specific address matched for each SNMP agent, and the SNMP agent identifier is previously recorded in the header of the management object request stream by the UPnP CP and transmitted. How the identifier is recorded in any field of the header can be modified according to the definition.

On the other hand, when the agent detection module 510 detects an identifier of the SNMP agent, the MIB management module 520 stores the corresponding management object of the SNMP agent corresponding to the detected identifier in the MIB storage module 530. Navigate in

The MIB tree records and links each management object, which is a subordinate node of each SNMP agent, using an SNMP agent as a top node, and has a kind of DOM (Document Object Model) tree structure.

Next, when the MIB management module 520 searches for the corresponding management object of the SNMP agent in the MIB tree stored in the MIB storage module 530, the search result, that is, the management object of the specific SNMP agent is converted into the protocol conversion module 540. ) Then, the protocol conversion module 540 converts the corresponding management object of the specific SNMP agent output from the MIB management module 520 into a predefined attribute tag format.

The conversion to the attribute tag format means a protocol conversion, because the UPnP CP transmits data in a tag format using a character notation format rather than binary notation format, and the attribute tag format is defined in the present invention. The form can be varied.

Next, the SCPD message generation module 550 records the attribute tag converted by the protocol conversion module 540 in the SCPD specific tag matched with the management object, and transmits the corresponding UPnP CP through the data input / output module 500. To be printed.

The SCPD specific tag is a tag format defined by UPnP, and the SCPD message generation module 550 assigns an attribute tag converted by the protocol conversion module 540 to an SCPD specific tag that is defined in the UPnP and matches the corresponding management object. Record it.

The recorded property tag is transmitted to the UPnP CP, and the UPnP CP can monitor the managed objects of the SNMP agents using the transmitted property tag information.

6 is a diagram illustrating the protocol conversion module of FIG. 5 as an example. First, for the operation of the protocol conversion module shown in FIG. 6, an object discrimination module (not shown) is provided in the MIB management module 520. Preferably, the object determination module determines whether the management object searched from the MIB tree is a single object or a table object and outputs discrimination data corresponding to the result.

Accordingly, the protocol conversion module converts a single object or a table object into a predefined attribute tag format according to the discrimination data output from an object not shown module, and a table object conversion. Module 542.

That is, in the protocol conversion module configured as described above, when the determination data output from the object determination module is data representing a single object, the single object conversion module 541 sets the single object as an attribute tag of a predefined single object. The table object conversion module 542 converts the table object into an attribute tag format of a predefined table object when the determination data output from the object determination module is data representing a table object.

FIG. 7A is a diagram conceptually illustrating a MIB tree stored in the MIB storage module.

As shown in the figure, each SNMP agent is a top node, and a single list and a table list are linked in parallel to the next lower node, and the last lower node has at least one single object and one table object in the single list and the table list, respectively. It is a linked DOM tree structure.

7B is a diagram illustrating an example of the MIB tree in more detail.

Here, "# 1" and "# 2" indicate the corresponding identifier of the SNMP agent, for example, the address of the SNMP agent, "sys", "interfaces" indicate a single list and a table list, respectively, " "sys Description", "sys Object" ... etc. linked to the corresponding node of sys "represent a single object in the present invention, and" if Number "," if Table "linked to the corresponding node of" interface " Represents a table object in the present invention.

8A is a diagram for describing a protocol conversion operation of a single object performed by the protocol conversion module. As shown in FIG. 8A, a single object name representing a single object is "<name> {single object name}". As described above, it is converted to a specific attribute tag format defined in the present invention, the notation format is "<data type>", the access information is "<default value>", and the annotation describing a single object is "<allowed value". range> ", and the like, in the present invention, in order to deliver a single object stored in the MIB tree to the UPnP CP, the single object and its related information are respectively converted into attribute tag formats defined in the present invention. Transmission to the UPnP CP, and thus the UPnP CP can recognize the information about a single object of the SNMP agent through the transmitted information.

FIG. 8B is a diagram for explaining a protocol conversion operation of a table object in the protocol conversion module. As shown in FIG. 8B, table objects of a specific table list are respectively represented by "{Table. 1} {Table. 2} ... {Table.n} "converts all the table objects linked to a specific table list into one set, and converts them into one set. The notation format is" <data type> ". ) Is represented by "<default value>", and an annotation describing a single object is represented by "<allowed value range>". The attribute tag format is merely an example and can be variously modified.

As described above, in the present invention, in order for the UPnP CP to recognize a single object or table object stored in the MIB tree, the related information is converted into the attribute tag format defined in the present invention and transmitted to the UPnP CP.

Next, a second embodiment of the bridge device according to the present invention will be described with reference to FIG.

Second Embodiment

The second embodiment relates to a bridge device that allows a UPnP CP to set or change a parameter of a specific management object of an SNMP agent.

First, as shown in FIG. 9, the second embodiment of the bridge apparatus according to the present invention includes a data input / output module 900 for interfacing network stream data with a UPnP CP and an SNMP agent in a predetermined data transmission unit. In the parameter setting request stream for a specific management object transmitted from the UPnP CP through the data input / output module 900, an agent detection for detecting an identifier of a specific SNMP agent and a corresponding management object, which are predefined and transmitted, respectively The module 910 and the managed object detection module 920 and the corresponding parameter setting request data of the specific managed object detected by the managed object detection module 920 are generated according to a predefined parameter setting command to input / output the data. A parameter for transmitting to the corresponding SNMP agent corresponding to the identifier detected by the agent detection module 910 through the module 900. Data setting / request module 930 and parameter setting response data transmitted from the SNMP agent are inputted through the data input / output module 900 and put in a notification message defined by SCPD. SCPD message generation module 940 to be transmitted to the corresponding UPnP CP through.

In this way, in the second embodiment of the present invention, the data input / output module 900 first interfaces the network stream data with the UPnP CP and the SNMP agent in predetermined data transmission units. That is, when transmitting data with the UPnP CP, parsing and packetizing the data transmission unit defined by UPnP which is middleware, and when transmitting data with the SNMP agent, parsing and packetizing the data transmission unit (PDU) prescribed by SNMP. do.

When the data input / output module 900 parses the management object request stream transmitted from the UPnP CP in a predetermined data transmission unit, the agent detection module 910 reads the parsed result and reads the stream header. Detects the SNMP agent identifier recorded in a specific field.

Preferably, the SNMP agent identifier uses one specific address matched for each SNMP agent. The SNMP agent identifier is previously recorded by the UPnP CP in a header of a management object request stream and transmitted. How to write a to any field of the header can be modified according to the definition.

In addition, the management object detection module 920 reads a parameter setting request stream for a specific management object parsed through the data input / output module 900 and records a management object recorded in a corresponding field of a preset header. Detect.

Next, when the managed object detection module 920 detects a managed object, the parameter setting request module 930 may check the parameter setting request data of the specific managed object detected by the managed object detection module 920 according to the present invention. Create according to the predefined parameter setting command.

Thereafter, the generated parameter setting request data is transmitted to the corresponding SNMP agent corresponding to the identifier detected by the agent detection module 910 through the data input / output module 900.

Next, when the SNMP agent sets a parameter of the management object according to the request data, and transmits response data corresponding to the result to the data input / output module 900, the SCPD message generation module 940 The parameter setting response data transmitted to the data input / output module 900 is included in a notification message defined by SCPD and transmitted to the corresponding UPnP CP through the data input / output module 900 to manage the managed object. Exit the setting for.

Meanwhile, FIG. 10 is a diagram illustrating the parameter setting request module 930 of FIG. 9 as an example. First, for the operation of the parameter setting request applied to FIG. 10, an object discrimination module is transmitted to the managed object detection module 920. (Not shown), and the object discrimination module determines whether the managed object searched from the MIB tree is a single object or a table object and outputs discrimination data corresponding to the result.

Accordingly, the parameter setting request module 930 transmits corresponding parameter setting request data of a single object or table object of a single object to a predefined parameter setting command according to the determination data output from the object determination module (not shown). A single object parameter setting request module 931 and a table object parameter setting request are generated according to the request and are transmitted to the corresponding SNMP agent corresponding to the identifier detected by the agent detection module 910 through the data input / output module 900. Module 932.

Next, a third embodiment of the bridge device according to the present invention will be described with reference to FIG.

Third Embodiment

The third embodiment relates to a bridge device that allows the UPnP CP to obtain parameters of a specific management object of the SNMP agent.

First, as shown in FIG. 11, a third embodiment of a bridge device according to the present invention includes a data input / output module 1100 for interfacing network stream data in a predetermined data transmission unit with a UPnP CP and an SNMP agent. And an agent detection module for detecting a specific SNMP agent identifier and a specific management object, which are predefined and transmitted, in a parameter acquisition request stream for a specific management object transmitted from the UPnP CP through the data input / output module 1100. 1110 and the managed object detection module 1120, and the parameter acquisition request data of the specific managed object detected by the managed object detection module 1120 according to a predefined parameter acquisition command to generate the data input / output module ( A parameter for transmitting to the corresponding SNMP agent corresponding to the identifier detected by the agent detection module 1110 through 1100. A data acquisition request module 1130, a protocol conversion module 1140 for converting a parameter of a specific object transmitted from the SNMP agent through the data input / output module 1100 into a predefined attribute tag format, and the conversion SCPD message generation module 1150 for recording the attribute tag to a specific tag of SCPD matched with the management object to output to the UPnP CP through the data input / output module 1100.

In this way, in the third embodiment of the present invention, the data input / output module 1100 first interfaces network stream data with each UPnP CP and SNMP agent in predetermined data transmission units. That is, when transmitting data with the UPnP CP, parsing and packetizing the data transmission unit defined by UPnP which is middleware, and when transmitting data with the SNMP agent, parsing and packetizing the data transmission unit (PDU) prescribed by SNMP. do.

When the data input / output module 1100 parses the management object request stream transmitted from the UPnP CP in a predetermined data transmission unit, the agent detection module 1110 reads the parsed result and inputs the result into a corresponding field. Detect the recorded specific SNMP agent identifier.

Preferably, the SNMP agent identifier uses one specific address matched for each SNMP agent. The SNMP agent identifier is previously recorded by the UPnP CP in a header of a management object request stream and transmitted. How to write a to any field of the header can be modified according to the definition.

In addition, the management object detection module 1120 reads a parameter setting request stream for a specific management object parsed through the data input / output module 1100 and detects a management object recorded in a corresponding field of a preset header. do.

On the other hand, when the managed object detection module 1120 detects a managed object, the parameter acquisition request module 1130 may acquire the corresponding parameter acquisition request data of the specific managed object detected by the managed object detection module 1120 according to the present invention. Generate according to the predefined parameter acquisition command.

Thereafter, the generated parameter acquisition request data is transmitted to the corresponding SNMP agent corresponding to the identifier detected by the agent detection module 1110 through the data input / output module 1100.

Next, when the SNMP agent reads the parameter of the management object according to the request data and transmits response data including the read parameter to the data input / output module 1100, the protocol conversion module 1140 may input the data. A parameter of a specific object transmitted from the SNMP agent through the output / output module 1100 into a predefined attribute tag format, and the SCPD message generation module 1150 converts the converted attribute tag to the management object. Write to a specific tag of the SCPD to output to the UPnP CP through the data input / output module 1100.

The conversion to the attribute tag format indicates a protocol conversion, because the UPnP CP transmits data in a tag format using a character notation format rather than binary notation format, and the attribute tag format is defined in the present invention. Can be variously modified.

In addition, the specific tag of the SCPD is a tag format defined in UPnP, and the SCPD message generating module records the converted attribute tag in a tag defined in the UPnP and matched with the management object.

FIG. 12 is a diagram illustrating the parameter acquisition request module 1130 of FIG. 11 as an example. First, in order to operate the parameter acquisition request shown in FIG. 12, an object is determined by the managed object detection module 1120. A module (not shown) is included, and the object discrimination module determines whether the managed object searched from the MIB tree is a single object or a table object and outputs discrimination data corresponding to the result.

Accordingly, according to the parameter acquisition request module 1130, the parameter setting request data of the corresponding parameter of the single object or the corresponding parameter of the table object according to the discrimination data output from the object determination module, respectively, to the predefined parameter setting command. The single object parameter acquisition request module 1131 and the table object parameter acquisition request to generate the data to be transmitted according to the SNMP agent corresponding to the identifier detected by the agent detection module 1110 through the data input / output module 1100. Module 1132.

In this way, the parameter acquisition request module 1130 may distinguish a single object from a table object and perform an acquisition request for a parameter of the corresponding object.

FIG. 13 illustrates the protocol conversion module 1140 of FIG. 11 as an example. As shown in FIG. 13, the protocol conversion module 1140 indicates whether a specific object transmitted from the SNMP agent is a single object or a table object. The object discrimination module 1141 for determining whether or not to output the discrimination data corresponding to the result, and the parameters of the single object or the table object according to the discrimination data output from the object discrimination module 1141. It consists of a single object conversion module 1142 and a table object conversion module 1143 for converting each of the attribute tag format to the SCPD message generation module 1150.

FIG. 14 is a diagram for explaining parameter setting and acquisition operations. As shown in FIG. 14, the setting of a single object parameter is "<name> Get {Single object parameter}" to acquire a single object parameter. Is converted to a specific attribute tag format defined in the present invention, such as "<name> Set {Single object parameter}", the notation format is "<data type>", and the access information is "<related state variable> {Single object parameter} ", and the states are represented as" <directed> out "and" <directed> in ", respectively. As described above, in the present invention, to transmit a single object parameter stored in the MIB tree to the UPnP CP. Each single object parameter is converted into the attribute tag format defined in the present invention, respectively, and transmitted to the UPnP CP. Accordingly, the UPnP CP recognizes the information on the single object parameter of the SNMP agent through the transmitted information. It is possible.

Although the above has been described only with a single object parameter, table object parameters are also possible in the same way.

Next, a first embodiment of a bridging method according to the present invention will be described with reference to FIG. 15.

First, the first embodiment of the bridging method according to the present invention detects a specific SNMP agent identifier previously defined and transmitted from the management object request stream transmitted by receiving the management object request stream of the UPnP CP (S100).

That is, the management object request stream transmitted from the UPnP CP is parsed in a predetermined data transmission unit, the parsing result is read, and a specific SNMP agent identifier recorded in the corresponding field is detected (S101).

When transmitting data with the UPnP CP, parsing and packetizing is performed in the data transmission unit defined by the middleware UPnP, and when transmitting data with the SNMP agent, the data is parsed and packetized by the data transmission unit (PDU) specified by the SNMP.

Preferably, the SNMP agent identifier uses one specific address matched for each SNMP agent. The SNMP agent identifier is previously recorded by the UPnP CP in a header of a management object request stream and transmitted. How to write a to any field of the header can be modified according to the definition.

Next, the corresponding management object of the SNMP agent corresponding to the detected identifier is searched in a pre-stored MIB tree (S102), that is, when the identifier of the corresponding SNMP agent is detected from the management object request stream, the corresponding management object corresponds to the detected identifier. The managed object of the SNMP agent is searched in the MIB tree.

The MIB tree records and matches a management object which is a subordinate node of each SNMP agent by using an SNMP agent as a top node, and has a kind of DOM tree structure.

Next, the corresponding management object of the searched specific SNMP agent is converted into a predefined attribute tag format, that is, if the corresponding management object of the SNMP agent is searched in the MIB tree, the search result, that is, the management object of the specific SNMP agent. Is converted into a predefined attribute tag format (S104, S105).

For example, when the management object is composed of a single object and a table object, determining whether the management object searched in the MIB tree is a single object or a table object between the steps and the step (S103). And converts a single object or table object into a predefined attribute tag format according to the determination result of the step (S104 and S105).

On the other hand, the conversion to the attribute tag format indicates a protocol conversion, because the UPnP CP transmits data in a tag format using a character notation format rather than binary notation format, the attribute tag format is defined in the present invention, The form can be variously modified.

Finally, the converted attribute tag is recorded in a specific tag of SCPD corresponding to the managed object (S105) and outputted to the UPnP CP (S106) to terminate the first embodiment of the present invention. Is a tag format defined in UPnP, and the SCPD message generation module records the converted attribute tag in a tag defined in the UPnP and matched with the management object.

Next, a second embodiment of the present invention will be described with reference to FIG.

As shown in FIG. 16, the second embodiment of the present invention first receives a parameter setting request stream of UPnP CP (S200) and transmits a specific SNMP agent identifier previously defined and transmitted from the transmitted parameter setting request stream. Each management object is detected (S201).

When transmitting data with the UPnP CP, parsing and packetizing is performed in the data transmission unit defined by the middleware UPnP, and when transmitting data with the SNMP agent, the data is parsed and packetized by the data transmission unit (PDU) specified by the SNMP.

When the data input / output module parses the management object request stream transmitted from the UPnP CP in a predetermined data transmission unit, the parsed result is read and a specific SNMP agent identifier recorded in the corresponding field is detected.

Preferably, the SNMP agent identifier uses one specific address matched for each SNMP agent. The SNMP agent identifier is previously recorded by the UPnP CP in a header of a management object request stream and transmitted. How to write a to any field of the header can be modified according to the definition.

Next, the parameter setting data of the detected specific management object is generated according to a predefined parameter setting command (S205). That is, when the management object is detected, the corresponding parameter setting request data of the detected specific management object is generated. Is generated according to the parameter setting command predefined in the present invention.

For example, when the managed object is composed of a single object and a table object, between the step and the step (S202) (S203) for determining whether the detected managed object is a single object or a table object. And generating the parameter setting data of the detected single object or the parameter setting data of the table object according to a predefined parameter setting command according to the determination result of the step (S204).

Next, the generated parameter setting request data is transmitted to the corresponding SNMP agent corresponding to the identifier detected by the agent detection module.

Then, the result of the parameter setting response transmitted from the specific SNMP agent is recorded in the notification message defined by SCPD, and finally, the notification message in which the parameter setting response result is recorded is transmitted to the UPnP CP (S206).

That is, when the SNMP agent sets a parameter of the management object according to the request data, and transmits response data corresponding to the result to the data input / output module, the SCPD message generation module is the data input / output module. The parameter setting response data transmitted to the UE is recorded in a notify message defined by SCPD, and then recorded, and finally, a notification message in which the parameter setting response result is recorded is transmitted to the UPnP CP.

Next, a third embodiment of the present invention will be described with reference to FIG.

As shown in FIG. 17, the third embodiment of the present invention first receives a parameter acquisition request stream of a UPnP CP (S300) and transmits a specific SNMP agent identifier previously defined and transmitted from the transmitted parameter acquisition request stream. Each management object is detected (S301).

When transmitting data with the UPnP CP, parsing and packetizing is performed in the data transmission unit defined by the middleware UPnP, and when transmitting data with the SNMP agent, the data is parsed and packetized by the data transmission unit (PDU) specified by the SNMP.

The management object request stream transmitted from the UPnP CP is parsed by a predetermined data transmission unit, the parsing result is read, and a specific SNMP agent identifier recorded in the corresponding field is detected.

In addition, the SNMP agent identifier is preferably to use one specific address matched for each SNMP agent, the SNMP agent identifier is a pre-recorded and transmitted in the header of the management object request stream by the UPnP CP, How the identifier is recorded in any field of the header can be modified according to the definition.

Next, parameter acquisition data of the detected specific management object is generated according to a predefined parameter acquisition instruction (S304) (S305).

That is, when the management object recorded in the corresponding field of the preset header is detected by reading the parameter setting request stream for the parsed specific management object, the parameter acquisition request data of the detected specific management object is previously defined in the present invention. Generate according to the parameter acquisition command.

For example, when the managed object is composed of a single object and a table object, between steps S302 and S303 further determine whether the detected managed object is a single object or a table object. In accordance with the determination result of the step, the parameter acquisition data of the detected single object or the parameter acquisition data of the table object is generated according to a predefined parameter acquisition instruction (S304) (S305).

Next, the generated parameter acquisition request data is transmitted to the corresponding SNMP agent corresponding to the detected identifier.

Subsequently, when transmitted from the specific SNMP agent according to the third step (S307), the corresponding parameter of the transmitted specific management object is converted into a predefined attribute tag format.

That is, when the SNMP agent reads parameters of the management object preset according to the request data (S308), and transmits response data including the read parameters to the data input / output module, the protocol conversion module may input the data input / output. The parameter of the specific object transmitted from the SNMP agent through the output module is converted into a predefined attribute tag format (S310) (S311).

At this time, the method further includes determining whether the specific object transmitted from the SNMP agent is a single object or a table object (S308) (S309), and according to the determination result of the step, the parameter or table of the single object. It is desirable to convert each parameter of an object to a predefined attribute tag format.

Finally, the converted attribute tag is recorded in the corresponding tag of SCPD matching the management object (S312) and transmitted to the UPnP CP (S313) to end the present invention. The conversion to the attribute tag format is protocol conversion. This is because the UPnP CP transmits data in a tag format using a character notation format rather than a binary notation format. The attribute tag format is defined in the present invention, and the format can be variously modified.

The specific tag of the SCPD is a tag format defined in UPnP, and the SCPD message generating module records the converted attribute tag in a tag defined in the UPnP and matched with the management object.

As described in detail above, the UPnP CP bridge device and method of the SNMP agent and UPnP CP of the present invention combine the action tag and the event tag used in UPnP to monitor and manage the management object pre-stored in the SNMP agent. In addition, it can control the SNMP agent by setting or changing the management object parameter of a specific SNMP agent through Query action.

Although the invention has been described in detail only with respect to the specific examples described, it will be apparent to those skilled in the art that various modifications and variations are possible within the spirit of the invention, and such modifications and variations belong to the appended claims.

1 is a diagram illustrating a system to which a general SNMP is applied,

2 is a diagram illustrating a home network system to which a general UPnP is applied.

3 is a view showing a system to which the bridge device of the present invention is applied,

4 is a diagram illustrating a UPnP application mounted in the bridge device of the present invention.

5 is a view showing a first embodiment of the bridge device according to the present invention;

6 is a diagram illustrating the protocol conversion module of FIG. 5 as an example;

FIG. 7A is a diagram for conceptually describing a MIB tree stored in the MIB storage module of FIG. 5;

FIG. 7B is a diagram illustrating an example of the MIB tree of FIG. 7A in more detail.

FIG. 8A is a diagram for describing a protocol conversion operation of a single object performed by the protocol conversion module of FIG. 5.

FIG. 8B is a diagram for describing a protocol conversion operation of a table object performed by the protocol conversion module of FIG. 5.

9 is a view showing a second embodiment of the bridge device according to the present invention;

FIG. 10 is a diagram illustrating the parameter setting request module of FIG. 9 as an example.

11 is a view showing a third embodiment of the bridge device according to the present invention;

FIG. 12 is a diagram illustrating the parameter acquisition request module of FIG. 11 as an example.

FIG. 13 is a diagram illustrating the protocol conversion module of FIG. 11 as an example.

FIG. 14 is a diagram for describing a conversion operation performed in the protocol conversion module of FIG. 11.

15 is a view showing a first embodiment of a bridging method according to the present invention;

16 is a view showing a second embodiment of the bridging method according to the present invention;

17A and 17B show a third embodiment of a bridging method according to the present invention.

Explanation of symbols on the main parts of the drawings

500: data input / output module 510: agent detection module

520 MIB management module 530 MIB storage module

540: protocol conversion module 550: SCPD message generation module

Claims (6)

A data input / output module for inputting / outputting network stream data in a predetermined data transmission unit with a UPnP universal plug and play control point (CP) and a simple network management protocol (SNMP) agent; An agent detection module for detecting a specific SNMP agent identifier predefined and transmitted in a management object request stream transmitted from the UPnP CP through the data input / output module; A MIB storage module for storing a management information base (MIB) tree in which a corresponding management object is recorded for each SNMP agent; A MIB management module for searching for and outputting a corresponding management object of the SNMP agent corresponding to the identifier detected by the agent detection module in the MIB tree stored in the MIB storage module; A protocol conversion module for converting a corresponding management object of a specific SNMP agent output from the MIB management module into a predefined attribute tag format; SCPD message generation module for recording the attribute tag converted by the protocol conversion module to a specific tag of the SCPD (Service Control Protocol Definition) matched with the management object to output to the UPnP CP through the data input / output module , SNMP agent and UPnP CP bridge device. A data input / output module for inputting / outputting network stream data in a predetermined data transmission unit with a UPnP CP and an SNMP agent; Agent detection module and management object detection for detecting a specific SNMP agent identifier and a management object, which are predefined and transmitted, in a parameter setting request stream for a specific management object transmitted from the UPnP CP through the data input / output module. module; The corresponding SNMP agent corresponding to the identifier detected by the agent detection module through the data input / output module is generated by generating corresponding parameter setting request data of a specific management object detected by the management object detection module. A parameter setting request module to transmit to a network; SCPD message generation module for receiving the parameter setting response data transmitted from the SNMP agent through the data input / output module and put in a notification message prescribed by SCPD to transmit to the UPnP CP through the data input / output module , SNMP agent and UPnP CP bridge device. A data input / output module for interfacing network stream data with a UPnP CP and an SNMP agent on a predetermined data transmission unit; Agent detection module and management object detection respectively detecting a predefined SNMP agent identifier and a specific management object, which are predefined and transmitted, in the parameter acquisition request stream for the specific management object transmitted from the UPnP CP through the data input / output module. module; Generate the parameter acquisition request data of the specific management object detected by the management object detection module according to a predefined parameter acquisition command and use the data input / output module as a corresponding SNMP agent corresponding to the identifier detected by the agent detection module. A parameter acquisition request module for transmitting; A protocol conversion module for converting a parameter of a specific object transmitted from the SNMP agent through the data input / output module into a predefined attribute tag format; An SNMP agent and a UPnP CP comprising an SCPD message generation module for recording the attribute tag converted by the protocol conversion module into a specific tag of SCPD matched with the management object and outputting it to the UPnP CP through the data input / output module. Bridge device. Detecting a specific SNMP agent identifier predefined and transmitted from the management object request stream transmitted from the UPnP CP; Searching for a corresponding management object of the SNMP agent corresponding to the detected identifier in a pre-stored MIB tree; Converting the corresponding management object of the searched specific SNMP agent into a predefined attribute tag format; And a fourth step of recording the converted attribute tag in a specific tag of SCPD corresponding to the management object and outputting the same to the UPnP CP. A first step of respectively detecting a specific SNMP agent identifier and a corresponding management object previously defined and transmitted from the parameter setting request stream transmitted from the UPnP CP; Generating a parameter setting data of the detected specific management object according to a predefined parameter setting command; A third step of transmitting the generated parameter setting data to a specific SNMP agent corresponding to the identifier detected in the first step; A fourth step of recording a parameter setting response result transmitted from the specific SNMP agent in a notification message defined by SCPD; And a fifth step of transmitting a notification message in which the parameter setting response result is recorded to the UPnP CP. A first step of respectively detecting a specific SNMP agent identifier and a corresponding management object previously defined and transmitted from the parameter acquisition request stream transmitted from the UPnP CP; Generating a parameter acquisition data of the detected specific management object according to a predefined parameter acquisition instruction; A third step of transmitting the generated parameter acquisition data to a specific SNMP agent corresponding to the identifier detected in the first step; A fourth step of converting a corresponding parameter of a specific management object transmitted from the specific SNMP agent into a predefined attribute tag format according to the third step; And a fifth step of recording the converted attribute tag in a corresponding tag of SCPD matching the management object and transmitting the same to the UPnP CP.