KR20070042001A - Method for obtaining WPNP device / service status information, and JPNP control device therefor, and JPNP device / service status information providing method and JPNP controlled device for same - Google Patents

Abstract

Disclosed are a method for easily and quickly obtaining UPnP device / service state information, a UPnP control device for this, and a method for providing UPnP device / service state information for this purpose and a UPnP controlled device for the same. The UPnP control apparatus according to the present invention includes a search message transmitting unit, a response message receiving unit, a response message analyzing unit, a state information obtaining unit, a state information request receiving unit, and a state information providing unit. In the discovery phase of the UPnP controlled device, the control information acquisition step, the control operation request and the necessary information acquisition step, the subscription request step, the event information reception step, etc. may be omitted by including the device / service status information in the discovery search response message. It is possible to obtain UPnP device / service status information easily and quickly.

Description

Method for acquiring UPnP device / service state information and controller therefor, and method of providing UPnP device / service state information and controlled device therefor}

1 is a configuration diagram of a UPnP home network.

2 is a diagram illustrating a message delivery process in a UPnP discovery step.

3 is a diagram illustrating a message delivery process in a UPnP description step.

4 is a diagram illustrating a message transfer process in a UPnP control step.

5 is a diagram illustrating a message delivery process in an UPnP eventing step.

6 illustrates an embodiment of a UPnP discovery search response message according to the present invention.

7 is a diagram illustrating an embodiment of a UPnP discovery alive message according to the present invention.

8 illustrates an embodiment of a UPnP discovery search message according to the present invention.

FIG. 9 is a diagram illustrating an embodiment of a discovery search response message for the UPnP discovery search message of FIG. 8.

10 is a diagram illustrating an embodiment of a UPnP discovery search response message according to the present invention.

11 illustrates a general UPnP discovery alive message.

12 illustrates a UPnP discovery alive message according to the present invention.

13 is a diagram illustrating an embodiment of device / service state information according to the present invention.

14 is a block diagram showing the configuration of an embodiment of a UPnP control device according to the present invention.

15 is a block diagram showing the configuration of an embodiment of a UPnP controlled device according to the present invention.

16A and 16B are flowcharts illustrating each step of an embodiment of a method for obtaining UPnP device / service state information according to the present invention.

The present invention relates to a configuration of a UPnP system, and more particularly, to a method for obtaining UPnP device / service state information in a UPnP control device and a method for providing UPnP device / service state information in a UPnP controlled device.

UPnP (Universal Plug and Play) is one of the standards that enables devices such as PCs, peripherals, intelligent appliances, and wireless devices to be automatically recognized using the Internet and Web protocols when connected to the network. With UPnP, when a user adds a device to the network, the device completes its own configuration, receives a TCP / IP address, and uses a discovery protocol based on the Internet http to inform other devices of its existence. Will be used.

For this purpose, a UPnP control device is required, which is called a control point (CP). The UPnP CP needs the device state information of a used device to be controlled, that is, a controlled device (CD) and the state information of a service to be provided. However, in the UPnP network, a plurality of control devices CP and controlled devices CD are generally present. Therefore, there is a need for a means for the UPnP CP to easily and quickly obtain status information of UPnP CDs on a home network.

An object of the present invention is to provide a method for quickly and easily obtaining UPnP device / service state information in a UPnP control device and a UPnP control device for the same.

Another object of the present invention is to provide a method for providing UPnP device / service state information in a UPnP controlled device for obtaining UPnP device / service state information in the UPnP control device and a UPnP controlled device for the same. will be.

Another object of the present invention is to provide a computer-readable recording medium having recorded thereon a program for executing the UPnP device / service status information on a computer.

According to an aspect of the present invention, there is provided a method of obtaining UPnP device / service state information in a UPnP control device, the method comprising: transmitting a discovery search message to at least one UPnP controlled device; Receiving a discovery search response message from one of the UPnP controlled devices; Parsing the HTTP body portion in the discovery search response message to determine whether it contains device / service state information; If the discovery search response message includes device / service status information, obtaining device / service status information in the discovery search response message; If the discovery search response message does not include device / service status information, request to send the device / service status information to the UPnP controlled device that has transmitted the discovery search response message, and the device from the UPnP controlled device. Receiving service status information; And providing the device / service status information to a user.

The UPnP control device for achieving the technical problem, Search message transmission unit for transmitting a discovery search message to one or more UPnP controlled devices; A response message receiver for receiving a discovery search response message from one of the UPnP controlled devices; A response message interpreter for interpreting the HTTP body portion in the discovery search response message to determine whether the device / service state information is included; A status information acquisition unit for acquiring device / service status information in the discovery search response message when the discovery search response message includes device / service status information; If the discovery search response message does not include device / service status information, request to send the device / service status information to the UPnP controlled device that has transmitted the discovery search response message, and the device from the UPnP controlled device. A status information request receiver for receiving service status information; And a status information providing unit for providing the device / service status information to a user.

According to another aspect of the present invention, there is provided a method of providing UPnP device / service state information in a UPnP controlled device, the method including: receiving a discovery search message from a UPnP controlled device; And transmitting a discovery search response message including device / service status information to the UPnP control device.

According to another aspect of the present invention, there is provided a UPnP controlled device including: a search message receiver configured to receive a discovery search message from a UPnP controlled device; And a response message transmitter for transmitting a discovery search response message including device / service status information to the UPnP control device.

Hereinafter, a method for obtaining UPnP device / service state information, a UPnP control device for providing the same, a method for providing UPnP device / service state information, and a UPnP controlled device for the same will be described in detail with reference to the accompanying drawings.

1 is a configuration diagram of a UPnP home network.

The devices constituting the UPnP home network can be broadly divided into a control device and a controlled device according to their role. A device under control, that is, a controlled device, is called a CD (controlled device). In FIG. 1, 100, 110, 120, and 130 correspond to this. UPnP CD provides various UPnP service functions according to the role of the device. The control device is a device or client that controls on the UPnP network. This is called a control point (CP). In FIG. 1, 140, 150, and the like correspond to this.

The UPnP-based home network refers to an environment in which a home UPnP CD and a UPnP CP exist on a mutually accessible network and can be controlled through a message protocol of a predetermined format.

The operation of the device in the UPnP home network can be divided into six stages according to the functional stages. In the addressing step of accessing the home network and setting its own unique address, the UPnP CD notifies the UPnP CP existing in the home network, or the UPnP CP desired by the UPnP CP. A discovery step of searching for a description step; a description step of allowing the UPnP CP to obtain device and service information of the UPnP CD; and a UPnP CP request and response message for UPnP CD control. A control step for sending and receiving, an eventing step for allowing the UPnP CP to know the progress information of the UPnP CD, and a presentation step for providing additional information or functions through HTML.

2 is a diagram illustrating a message delivery process in a UPnP discovery step. Referring to FIG. 2, the discovery step can be divided into two types, one in which a new UPnP CD enters a home network, and the other in which a UPnP CP enters a home network.

When a UPnP CD enters the network, the UPnP CD sends a multicast message on the network to inform UPnP CPs on the home network that it is on the network, which is called advertisement.

On the other hand, when the UPnP CP enters the home network while the UPnP CD is present on the home network, the UPnP CP sends a multicast message that finds the device or service that it wants to control. The UPnP CD that meets the corresponding message conditions sends a response to the UPnP CP as a unicast message. As described above, there is a simple service discovery protocol (SSDP) as a protocol for providing a multicast discovery mechanism used in UPnP.

3 is a diagram illustrating a message delivery process in a UPnP description step. The technical stage refers to a stage in which UPnP CP obtains corresponding information by analyzing a service template XML file provided by UPnP CD for a specific function of UPnP service necessary for controlling UPnP CD. First, find out the service description location information of the UPnP service that supports by reading the device description that describes the UPnP CD, and then access each service technology based on this to obtain the function related information of the UPnP service. Come.

4 is a diagram illustrating a message transfer process in a UPnP control step. The control phase indicates a process in which the UPnP CP makes a specific control request based on the function related information of the UPnP service acquired through the description phase, and the UPnP CD performs a work according to the control request and returns a corresponding result. In this case, information on the action message type and format of the corresponding service is defined in a service specification of each UPnP working committee.

5 is a diagram illustrating a message delivery process in an UPnP eventing step. The eventing step is to obtain information when the UPnP CP wants to know a change in the internal state of the UPnP CD. In order for the UPnP CP to receive the event message, which is the status information of the UPnP CD, the UPnP CD must subscribe to each service for each service and the UPnP CD must accept it. Once the UPnP CP receives a subscription request, the UPnP CD notifies the registered UPnP CPs according to the internal condition of each service. Herein, the internal condition and the notification message type are defined in a service specification of each UPnP working committee.

According to this method, the UPnP CP first discovers the UPnP CD and then acquires device / service status information through various actions and eventing mechanisms. When a new UPnP CP is added, this process must be repeated for all UPnP CDs on the network, which causes a lot of time and inconvenience in unnecessary operation to provide an appropriate control environment for the user.

In the present invention, it is possible to easily and quickly obtain UPnP device / service status information by discovering a controlled device and at the same time obtaining device / service status information in a discovery step.

6 illustrates an embodiment of a UPnP discovery search response message according to the present invention. Referring to FIG. 6, the UPnP discovery search response message uses an HTTP format. The UPnP discovery search response message according to the present invention includes the device / service status information 600 in the HTTP body.

7 is a diagram illustrating an embodiment of a UPnP discovery alive message according to the present invention. Referring to FIG. 7, the UPnP discovery alive message according to the present invention includes device / service state information 610 in the HTTP body.

8 illustrates an embodiment of a UPnP discovery search message according to the present invention. Referring to FIG. 8, the UPnP CP searches the ST (item target item) 620 by inserting device information or service information of a specific UPnP CD to be searched.

FIG. 9 is a diagram illustrating an embodiment of a discovery search response message for the UPnP discovery search message of FIG. 8. The location of the service description is determined by reading the device description according to the information in the LOCATION item, and the control and eventing steps are performed according to the information in the device description and the service description. The corresponding information of UPnP CD is obtained through.

10 is a diagram illustrating an embodiment of a UPnP discovery search response message according to the present invention. Referring to FIG. 10, the UPnP discovery search response message according to the present invention has a message format including device / service state information 640.

FIG. 11 is a diagram illustrating a general UPnP discovery alive message, and FIG. 12 is a diagram illustrating a UPnP discovery alive message according to the present invention. 11 and 12, it can be seen that the discovery alive message according to the present invention includes the device / service status information 650.

13 is a diagram illustrating an embodiment of device / service state information according to the present invention. Referring to FIG. 13, device / service state information of a UPnP media renderer device is represented in an XML format.

In the case of a media renderer device, it consists of three services. To know the device status information, service description information for each service must be read, and the status information of the corresponding media renderer device can be obtained based on the information obtained through control and eventing mechanisms. You must come.

If such information is provided to the UPnP CP in the discovery step in the form shown in FIG. 13, reading the device description and reading the service description location information, the service description acquiring control information supported by reading the description, requesting an appropriate control action to obtain necessary information, requesting a subscription of an eventing step, and eventing Receiving eventing information and acquiring necessary information may be omitted. Therefore, UPnP device / service status information can be obtained easily and quickly.

14 is a block diagram showing the configuration of an embodiment of a UPnP control device according to the present invention, Figures 16a and 16b is a flow chart showing each step of an embodiment of a method for obtaining UPnP device / service status information according to the present invention. . Referring to FIG. 14, the UPnP control apparatus 700 according to the present invention includes a search message transmitter 710, a response message receiver 720, a response message interpreter 730, a state information acquirer 740, and state information. And a request receiving unit 750 and a state information providing unit 760.

The search message transmitter 710 transmits a discovery search message to one or more UPnP controlled devices (S100).

The response message receiving unit 720 receives a discovery search response message from one of the UPnP controlled devices (S110).

The response message interpreter 730 interprets the HTTP body part in the discovery search response message to determine whether the device / service state information is included (S120).

When the discovery search response message includes device / service status information, the state information obtaining unit 740 obtains and aggregates device / service status information in the discovery search response message (S130).

When the discovery search response message does not include the device / service status information, the status information request receiving unit 750 requests to send the device / service status information to the UPnP controlled device that has transmitted the discovery search response message. The device / service state information is received from the UPnP controlled device (S200 to S260).

The case where the discovery search response message does not include the device / service state information is for a case where the UPnP controlled device does not use the device / service state information providing method according to the present invention. This will be described in detail as follows.

First, the state information request receiver 750 reads device description information in a discovery search response message (S200). Next, service description information in the device description information is read (S210), and control operation information in the service description information is read (S220).

Based on the device description information, the service description information, and the control operation information, a control action is requested to the UPnP CD and a response thereof is received (S230).

Next, the status information request receiver 750 determines whether event information is necessary for obtaining status information of the corresponding device / service (S240).

If the event information is required, the subscriber requests the subscription of the event information to the UPnP CD (S250), and receives the event message from the UPnP CD (S260).

The state information providing unit 760 provides the device / service state information thus obtained to the user (S140).

15 is a block diagram showing the configuration of an embodiment of a UPnP controlled device according to the present invention. Referring to FIG. 15, the UPnP controlled device 800 according to the present invention includes a search message receiver 810 and a response message transmitter 820.

The search message receiving unit 810 receives a discovery search message from the UPnP control device. This corresponds to step S100 of FIG. 16A.

The response message transmitter 820 transmits a discovery search response message including device / service status information to the UPnP control device as shown in FIG. 10.

The present invention can be embodied as code that can be read by a computer (including all devices having an information processing function) in a computer-readable recording medium. The computer-readable recording medium includes all kinds of recording devices that store data that can be read by a computer system. Examples of computer-readable recording devices include ROM, RAM, CD-ROM, magnetic tape, floppy disks, optical data storage devices, and the like.

Although the foregoing description has been focused on the novel features of the invention as applied to various embodiments, those skilled in the art will appreciate that the apparatus and method described above without departing from the scope of the invention. It will be understood that various deletions, substitutions, and changes in form and detail of the invention are possible. Accordingly, the scope of the invention is defined by the appended claims rather than in the foregoing description. All modifications within the scope of equivalents of the claims are to be embraced within the scope of the present invention.

According to the present invention, a method for obtaining UPnP device / service state information, a UPnP control device for the same, and a method for providing UPnP device / service state information and a UPnP controlled device for the same, the discovery search response message in the discovery step of the UPnP controlled device By including the device / service status information in the delivery, the control information acquisition step, the control operation request and the necessary information acquisition step, the subscription request step, the event information receiving step, etc. can be omitted, making UPnP device / service status information easy There is an effect that can be obtained quickly.

Claims (5)

Transmitting a discovery search message to at least one Universal Plug and Play (UPnP) controlled device; Receiving a discovery search response message from one of the UPnP controlled devices; Parsing the HTTP body portion in the discovery search response message to determine whether it contains device / service state information; If the discovery search response message includes device / service status information, obtaining device / service status information in the discovery search response message; If the discovery search response message does not include device / service status information, request to send the device / service status information to the UPnP controlled device that has transmitted the discovery search response message, and the device from the UPnP controlled device. Receiving service status information; And And providing the device / service status information to a user. UPnP device / service status information obtaining method of a UPnP control device. A search message transmitter for transmitting a discovery search message to one or more UPnP controlled devices; A response message receiver for receiving a discovery search response message from one of the UPnP controlled devices; A response message interpreter for interpreting the HTTP body portion in the discovery search response message to determine whether the device / service state information is included; A status information acquisition unit for acquiring device / service status information in the discovery search response message when the discovery search response message includes device / service status information; If the discovery search response message does not include device / service status information, request to send the device / service status information to the UPnP controlled device that has transmitted the discovery search response message, and the device from the UPnP controlled device. A status information request receiver for receiving service status information; And And a status information providing unit for providing the device / service status information to a user. Receiving a discovery search message from a UPnP control device; And And transmitting a discovery search response message including device / service state information to the UPnP control device. A search message receiver for receiving a discovery search message from a UPnP control device; And And a response message transmitter for transmitting a discovery search response message including device / service status information to the UPnP controller. Transmitting a discovery search message to at least one UPnP controlled device; Receiving a discovery search response message from one of the UPnP controlled devices; Parsing the HTTP body portion in the discovery search response message to determine whether it contains device / service state information; If the discovery search response message includes device / service status information, obtaining device / service status information in the discovery search response message; If the discovery search response message does not include device / service status information, request to send the device / service status information to the UPnP controlled device that has transmitted the discovery search response message, and the device from the UPnP controlled device. Receiving service status information; And A computer-readable recording medium having recorded thereon a program for causing a computer to execute the step of providing the device / service status information to a user.

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