KR100548265B1 - Device controlling system and method for network based to privately internet protocol - Google Patents

Abstract

The present invention relates to a system and method for controlling a device in a private IP based network. In particular, when building a UPnP based home network in an apartment, UPnP devices can be remotely implemented by implementing a private IP segment using UPnP IGD for each apartment. The purpose is to enable discovery and control. The present invention for this purpose stores the apartment information for the devices (213, 214) in the home network and provides the apartment information when the user is connected and authenticated on the web, and the apartment complex server 230 When the remote user 240 connects using the device's URL checked from the device, the UPnP IGD 211 connects to the corresponding device in the home network and the device 213 and 214 in the home network. Extract the information, request the public address assignment to the UPnP IGD 211, modify the address information in the specification information with the responded address information, and access the apartment complex server 230 to authenticate the device 213 and 214. UPnP IGD CP (212) for storing specification information in the apartment complex server 230 and then disconnecting from the apartment complex server 230 The name of a feature.

Description

DEVICE CONTROLLING SYSTEM AND METHOD FOR NETWORK BASED TO PRIVATELY INTERNET PROTOCOL}

1 is a hierarchical configuration diagram of a network in which private IP segments are constructed for each call according to an embodiment of the present invention.

Figure 2 is a block diagram of a device control system in a network using a private IP segment in an embodiment of the present invention.

Figure 3 is a signal flow diagram illustrating a specification networking procedure of the UPnP IGD CP in an embodiment of the present invention.

4 and 5 are flowcharts illustrating an operation of transmitting a specification document in an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

211: UPnP IGD 212: UPnP IGD CP

213,214: UPnP device 220: router

230: apartment complex server

The present invention relates to network system implementation, and more particularly, to a device control system and method in a private IP based network.

The communication between two or more devices in a home is called a home network.

The proliferation of home networking has transformed the existing PC-oriented network environment from home to the environment where various sub-network technologies are used, and the necessity of a technology that can network these home appliances in an independent and unified manner using IP protocol. UPnP ^™ technology has been proposed.

UPnP ^TM Device Architecture 1.0 is based on distributed and open networking architectures, enabling each appliance in a home network to be peerless to peer-to-peer networking instead of centrally managed.

According to UPnP ^™ (hereinafter abbreviated as UPnP) Device Architecture 1.0, the discovery of UPnP devices takes place in a distributed and open networking fashion using IP multicast within range within the home network.

On the other hand, in the case of a large apartment complex, a network is constructed based on the apartment building or the whole apartment as a basic unit.

Therefore, if UPnP technology is applied to a network built in a large apartment complex, devices installed in each arc may be found and controlled.

 However, conventionally, even when UPnP technology is applied, when a network is composed of the same IP segment in a large apartment complex or an entire apartment complex, UPnP devices using IP multicast cannot be found for each call.

That is, in the related art, IP multicast domains can be distinguished by software by configuring VLANs (Visual LAN: Virtual LAN) for each call, but each VLAN must support VLANs as many as the number of calls within a network device. Even if it is, there is a limitation on the VLAN configuration and use due to the degradation of the overall network equipment due to the VLAN configuration and maintenance.

In addition, the conventional IP multicast service cannot be guaranteed to be normally performed in the Internet range, and as a result, the control of the UPnP device using information obtained through the discovery of the UPnP device is not possible through the Internet.

In order to solve this problem, when building a UPnP-based home network in an apartment, a new apartment network configuration method for discovering and controlling UPnP devices for each apartment is required.

Therefore, in order to improve the conventional problem, when the UPnP-based home network is constructed in the apartment, the invention can be realized so that UPnP devices can be found and controlled remotely by implementing a private IP segment using UPnP IGD for each apartment. An object is to provide a device control system and method in a private IP-based network.                         

That is, according to the present invention, the apartment complex server and the UPnP IGD CP in the home network for each house are interlocked to perform the general security function of the apartment complex, so that the user can discover and control the UPnP device in the home through the Internet. The purpose is to.

In order to achieve the above object, the present invention maintains device specification information in a home network in a HomeNetBind table, and provides a distributed server for providing the corresponding specification information when the user is authenticated by accessing the web, and accessing the distributed server. After authentication, the UPnP IGD CP is updated to transmit the device specification information in the home network to update the homenet bind table and determine to maintain / disconnect the connection with the distributed server, and the IGD CP at the request of the UPnP IGD CP. When connected to the distributed server, the connection maintenance and disconnection between the IGD CP and the distributed server by the determination of the IGD CP and connected from the remote terminal using the device URL of the device specification information confirmed from the distributed server Configured with a home gateway (IGD) that connects to the device in the network It characterized.

In addition, the present invention provides a method for controlling UPnP devices in each home network in a network using a private IP segment to achieve the above object, the method comprising: a first step of discovering devices in a home network and extracting specification information; A second step of converting the address information (private address, port number) in the specification information into address information (public address, port number) received from the home gateway when the specification information has a private address, and the distributed server of the network. A third step of transmitting the specification information to the distributed server when the authentication is successful by connecting; and a fourth method of directly connecting to the corresponding device in the home network and remotely controlling the device through the URL of the device included in the specification information stored in the distributed server. Characterized in that configured to perform the steps.

On the other hand, when the public address change event is confirmed from the home gateway, the present invention changes the address information in the current specification information to a new public address, connects to a distributed server, and then transmits the changed specification information. Characterized in that configured to perform, including the step.

That is, the present invention constructs a network for constructing a private IP segment for each call by using UPnP IGD (Internet Gateway Device) for each call in a complex such as an apartment, and so on. It is to allow the apartment complex server existing to perform general security functions of the user to interlock, so that the user can discover and control UPnP devices in each home through the Internet.

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

1 is a hierarchical configuration diagram of a network in which private IP segments are constructed for each call according to an embodiment of the present invention. As shown in FIG. 1, a switch is connected to a router 110 for connection to an external heterogeneous network. The equipment 120 is connected to the switch equipment 120 and the complex server 130 for the management of security functions in the apartment complex, etc., a plurality of UPnP Internet Gateway Device (IGD) to the switch equipment 120 141 to 144 are connected to each of the UPnP IGDs 141 to 144 so that each home private IP segment 151 to 154 is connected.

That is, in the embodiment of the present invention, separate private IP segments 151 to 154 are configured by using UPnP IGDs 141 to 144 for each call in order to discover and control UPnP devices for each apartment.

In this case, considering only the UPnP IGD 141 and the home private IP segment 151, the UPnP IGD 141 is connected to the upper switch device 120 to give a public address for the upper connection from a DHCP server in the apartment complex. The sub-connection is performed using the private IP segment 151 for the home network configuration.

Therefore, in the embodiment of the present invention, within the home network constructed for each apartment in a range that complies with the UPnP Device Architecture (DA) version 1.0 specification so that a user can discover and control the UPnP device for each apartment in the apartment through the Internet. It is assumed that the UPnP IGD CP and the apartment complex server will be described.

2 is a block diagram of a device control system in a network using a private IP segment according to an embodiment of the present invention, which stores specification information about devices 213 and 214 in a home network, and is accessed by a user on the web. When the apartment complex server 230 provides the corresponding specification information and the remote user 240 accesses using the URL of the device checked from the apartment complex server 230, the remote terminal 240 connects to the corresponding device in the home network. Discover the UPnP IGD 211 and the devices 213 and 214 in the home network, extract the specification information of the corresponding device 213 and 214, and request the public address assignment to the UPnP IGD 211 and use the specified address information as the reply address information. The address information of the device 213 and 214 is broken when it is authenticated by accessing the apartment complex server 230. After only on server 230 is configured by including a UPnP IGD CP (212) for releasing the connection to the apartment only server 230.

The UPnP IGD CP 212 is a function of the IGD CP that receives a response to the UPnP IGD 211 to the UPnP IGD 211 found in the home network, and responds to the original function, and the public address information assigned from the UPnP IGD 211 By modifying the device specification information to reflect the configuration is configured to provide a discovery extension that transmits to the apartment complex server 230, it is possible to link with the apartment complex server 230 so that users can discover and control UPnP devices over the Internet To help.

That is, the discovery extension cannot guarantee that the discovery of UPnP devices using IP multicast is normally performed in the Internet range, so that the UPnP IGD CP 212 existing in each home network constructed by each call and the apartment existing on the Internet It is only to perform the device discovery interworking function between the server 230.

The apartment complex server 230 is configured to include a general management function of the apartment complex and a discovery function for storing the detailed information transmitted from the IGD CP 212 to provide to the remote user 240.

In the drawing, reference numeral 220 denotes a router for connecting the apartment network to the Internet.

In the drawings, reference numeral 240 denotes a user as a user who can access a home network using a portable terminal such as a desktop PC, a laptop PC, a PDA, a mobile communication terminal, and the like. Let's do it.

When described in detail with reference to Figure 4 the operation process and effect in the embodiment of the present invention configured as described above.

In the embodiment of the present invention, the networking process between the UPnP IGD CP 212 and the apartment complex server 230 is shown in Figure 3, the description (Description), home network connection (HomeNetworkBind), remote control (RemoteControl) It is operated in steps, which will be described in detail for each step as follows.

As a first step, the description step is a step in which the UPnP IGD CP 212 in the home network constructed for each call informs the apartment complex server 230 of device specification information.

If the address information in the device specification document is a private address instead of public address information, the UPnP IGD CP 212 is assigned a public address from the UPnP IGD 211 using the AddPortMapping action, and assigns the private address information in the specification document. Converts the received public address and port value.

Thereafter, the UPnP IGD CP 212 establishes a connection to the apartment complex server 230 and performs an authentication step, and transmits the converted device specification information to the apartment complex server 230 and releases the connection.

At this time, when the UPnP IGD CP 212 goes through the connection setting and authentication step for the transmission of the device specification information, the user in the HomeNetworkBind step by transmitting authentication information that is set in advance in the HomeNetBind table in the apartment complex server 230 After accessing the apartment complex server 230, the device information of the home network to which the user belongs can be identified.

If the public address assigned to the external connection of the UPnP IGD 211 is changed, the UPnP IGD CP 212 obtains the changed public address from the UPnP IGD 211 to convert address information of the specification document and the apartment complex server. Transmit to 230 again. In this process, when the public address assigned to the external connection is changed, the UPnP IGD 211 notifies the UPnP IGD CP 212 using the UPnP event.

When the UPnP device finishes service in the network, the UPnP IGD CP 212 transmits device release information to the apartment complex server 230 by using a discovery extension function, thereby maintaining the corresponding apartment complex server 230. Allows device specification information to be released.

In addition, the UPnP IGD CP 212 releases the public address item assigned to the UPnP IGD 211 using the DeletePortMapping action.

In the second step, the home network connection step is to classify the specification information of the device corresponding to the home network to which the user belongs among the device specification information provided by the UPnP IGD CP 212 in the home network by using the user authentication information as a search key in the HomeNetBind table. To discover.

RemoteControl (Step 3) is a step in which a user directly controls a UPnP device in a home network by using a presentation URL in device specification information.

Meanwhile, in the embodiment of the present invention, a detailed networking process between the UPnP IGD CP 212 and the apartment complex server 230 will be described with reference to FIG. 4.

First, the UPnP IGD CP 212 is present in the home network and during the discovery phase of the UPnP device architecture 1.0, the UPnP device in the home network advertises its presence or directly searches for the UPnP device. Discover the UPnP device through the extraction, and extract the description information of the found device (213) (214).

Thereafter, the UPnP IGD CP 212 requests the public address assignment to the UPnP IGD 211 to the UPnP devices 213 and 214 found in the home network, responds to the public address, and receives the public address information allocated from the UPnP IGD 211. Revise the device specification information to reflect this.

That is, the UPnP IGD CP 212 performs UPnP IGD 211 by executing the discovery extension function when the URL-based address information in the specification information of the UPnP devices 213 and 214 found in the home network is identified as private address information due to the use of NAT. Acquire public address information from the NAT module of < RTI ID = 0.0 >) < / RTI > and replace the address information in the specification information with the public address information, and convert the private address and port information in the specification information into the public address and port value assigned from the UPnP IGD 211. .

Thereafter, the UPnP IGD CP 212 establishes a connection to the apartment complex server 230 and authenticates based on the authentication information, and then specifies the specification information of the UPnP device 213 and 214 found in the home network. 230, and disconnects the apartment complex server 230.

Accordingly, the apartment complex server 230 classifies and manages the device specification information transmitted from the UPnP IGD CP 212 based on the HomeNetBind table information using the user authentication information as a search key.

That is, the apartment complex server 230 separately holds the device specification information for each home network based on the HomeNetBind table information using the user authentication information (eg, username) as a search key, and the UPnP IGD CP 212 or the remote user 240. In the authentication process of), user name and password input are required to perform home network identification, device specification information search and legitimate user verification.

Subsequently, the remote user 240 accesses the apartment complex server 230 through the router 220 using the notebook PC, authenticates the user, checks the presentation URL in the specification information, and checks the corresponding presentation URL in the home network. Connect to a device and control that device.

However, when the service provider does not use the network for a certain period of time when the service provider is serving the home network, an address allocated to the user is released to alleviate the address shortage problem.

In the embodiment of the present invention, when the public address used in the UPnP IGD 211 is released due to the elapse of a certain idle period, when a new public address is allocated, the UPnP IGD CP 212 converts the address information of the specification document and the apartment complex server. Transmit to 230 again.

That is, if the UPnP device in the home network uses a private address and the address is released and then changed to a new address, the UPnP IGD CP 212 needs to convert address information in the specification document again, which will be described with reference to the operation flowchart of FIG. 5. Is as follows.

First, when the public address is released, the UPnP IGD 211 serving the home network notifies the UPnP IGD CP 212 of the newly authorized public address value using the UPnP event.

At this time, the UPnP IGD CP 212 receives the changed public address value as an event and converts the address information value in the UPnP device specification document into the changed public address value.

Thereafter, the UPnP IGD CP 212 establishes a connection to the apartment complex server 230 and transmits a device specification document through an authentication step, and then releases the connection with the apartment complex server 230.

In addition, in the case where the device specification information in the home network is changed as in the process of transmitting a changed device specification document when a new public address is allocated after the connection with the apartment complex server 230 is released as described above, the UPnP IGD CP 212 ) Transmits the changed device specification information to the apartment complex server 230.

As described in detail above, the present invention has an effect of discovering and controlling UPnP devices for each apartment by building a private IP segment based on UPnP IGD for each apartment.

That is, the present invention provides convenience to the user by allowing the user to discover and control the UPnP device in his home network built by the door of the apartment complex from a remote location.

In addition, the present invention by interlocking the UPnP IGD CP in the home network and the server existing for performing the general security function of the apartment complex, the user can find and control the UPnP device in the home via the Internet, so that the user access through the Internet The service can be distributed to improve the processing power of the central management server.

Claims (5)

Distributed server means for storing specification information of devices in the home network in a HomeNetBind table and providing the corresponding specification information when the user is authenticated by accessing the web; A home gateway means for connecting to a corresponding device in a corresponding home network when a remote user accesses using a URL of the device identified by the distributed server means; After discovering a device in a home network, extracting specification information of the device, requesting an assignment of a public address to the home gateway means, modifying address information in the specification information with the corresponding address information, and accessing the distributed server means. And UPnP control point means for forwarding and storing specification information of the device to the distributed server means. The method of claim 1 wherein the UPnP control point means An IGD CP function for requesting a public address assignment to a home gateway means for a UPnP device found in a home network; Private IP characterized in that it is configured to enable interworking with the distributed server means by including a discovery extension function for modifying the device specification information reflecting the public address information allocated from the home gateway means and then transmitting to the distributed server means Device control system in the base network. A device control method in each UPnP home network in a network using a private IP segment, A first step of discovering devices in a home network and extracting specification information; A second step of converting private address information (private address, port number) in the specification information by receiving public address information (public address, port value) when it is confirmed that the specification information has a private address; A device in a private IP based network configured to perform a third step of transmitting and storing the specification information to the distributed server means in a means of UPnP IGD control if authentication is successful by connecting to distributed server means in a network. Control method. The method of claim 3, further comprising the step of directly connecting and remotely controlling the corresponding device in each home network through the presentation URL of the device included in the specification information stored in the distributed server means. Device control method in IP based network. The method of claim 3, further comprising: changing the address information in the current specification information to a new public address when the public address change event is received, connecting to a distributed server means, and then transmitting the changed detailed information. Device control method in a private IP based network, characterized in that configured to.

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