KR20110109255A

KR20110109255A - Method for synchronizing service description information among control points

Info

Publication number: KR20110109255A
Application number: KR1020100028899A
Authority: KR
Inventors: 손상기
Original assignee: 주식회사 히타치엘지 데이터 스토리지 코리아
Priority date: 2010-03-31
Filing date: 2010-03-31
Publication date: 2011-10-06

Abstract

In the method of synchronizing service details between control points according to the present invention, for example, in a UPnP-based home network system, when a new control point is connected to a home network, the previous control point is already connected to the home network. Through the interface with, efficiently receive and manage the service details of each device, and if the service details are received from a plurality of control points, and selects the service details received from the oldest control point and In addition, in the new control point, when the idle state, by updating and storing the stored service detailed information through the interface with each device, the communication load of the home network is inefficiently increased, or the performance of the home network system is unnecessary. To be degraded It is possible to prevent the kite.

Description

Method for synchronizing service description information among control points}

The present invention relates to a method for synchronizing service details between control points applied to, for example, a Universal Plug and Play (UPnP) based home network system.

In general, the communication between a plurality of home appliances used in the home is called a home network in a broad sense, and as is widely known, Universal Plug and Play (UPnP) technology is applied to the home network. It is called a home network system based on UPnP.

On the other hand, the home network, as a way to enable devices of different models and manufacturers to communicate with each other with compatibility, for example, a well-known digital living network alliance (DLNA) network is used.

In addition, a control point (CP) such as a personal computer (PC) is connected and connected to the home network, and various types of devices such as a digital television (D-TV) or a CD-player (CD-Player) are connected. Devices are connected.

In addition, the control point CP provides a user interface, and the user controls operation of any desired devices through the user interface provided by the control point CP.

Meanwhile, in the control point CP, as is well known in the home network technology, a unique IP address for each device connected to the home network using a Dynamic Host Configuration Protocol (DHCP). Will be assigned.

In addition, the control point (CP), using the Simple Service Discovery Protocol (SSDP), to discover the respective devices, and to explain the service (Service) information supported by each device (Description) The device is received from each device using a device description document (DDD) and a service description document (SDD), and then stored and managed in a nonvolatile storage.

In the control point CP, the service detailed information is searched and referred to, and the service supported by each device is called and controlled. Then, event information transmitted from an arbitrary device is received. The state transition of the device, for example, determines a power on / off state of the device.

For example, as shown in FIG. 1, the first to third devices 10, 12, 14 and the first and second control points 11, 13 are connected to a home network. In the state, when the third control point 15, which is a new control point, is connected to the home network, the third control point 15 performs a series of multi-casting discovery messages. Through the search operation, the first to third devices are discovered.

In addition, the third control point 15 requests, receives, stores, and manages detailed information describing service information supported by the first to third devices 10, 12, and 14, respectively. For example, as illustrated in FIG. 2, the third control point 15 includes a device description document (DDD) provided to a root device of the first device 10 and an embedded ( It requests and receives and stores and manages a service description document (SDD) provided by an embedded device.

However, service detailed information for each of the devices is stored and managed in the first and second control points 11 and 13 that are already connected to the home network. That is, although the service control information for each device is stored and managed in the previous control points 11 and 13 already connected to the home network, the new control point 15 discovers each device. Since a series of operations for requesting and receiving detailed service information are performed, the communication load of the home network is inefficiently increased, and the performance of the home network system is unnecessarily degraded.

According to the present invention, for example, in a UPnP-based home network system, when a new control point is connected to a home network, a service of each device is provided through an interface with a previous control point already connected to the home network. The present invention provides a method for synchronizing service detail information between control points to efficiently receive and store detailed information.

In the method for synchronizing service details between control points according to the present invention, in a UPnP-based home network system in which a control point and devices are connected and connected through a home network, when a new control point is connected and connected to the home network, the new control point In step 1, the method further comprises: finding a previous control point already connected to the home network; And requesting and receiving service detailed information of each device stored and managed in the found previous control point, and storing and managing in the new control point.

The service detailed information may be description information for explaining service information supported by each device.

In the second step, when the service detailed information is received from a plurality of control points, the service detailed information received from any one of the oldest control points is selected and stored and managed in the new control point. ,

In addition, the second step, by checking the time that each of the control points transmitted the service detailed information or the time when the service is performed, and selects the service detailed information received from any one of the oldest control point ,

The method may further include invoking a service supported by an arbitrary device by referring to the stored managed service detailed information at the new control point.

In addition, when the idle state is set at the new control point, the service detailed information of the corresponding device is requested and received through an interface with a device connected and connected through the home network, and the stored service detailed information is updated and stored. Characterized in that it further comprises the step of.

1 illustrates an embodiment of a typical UPnP based home network system,
2 illustrates an embodiment of an interface operation between a general control point and a device,
3 illustrates an embodiment of a UPnP-based home network system to which the present invention is applied.
Figure 4 shows the configuration of an embodiment for a control point to which the present invention is applied,
5 is a flowchart illustrating an embodiment of a method for synchronizing service details between control points according to the present invention;
6 illustrates an embodiment of device information and service information applied to the present invention.

Hereinafter, a preferred embodiment of a method for synchronizing service detail information between control points according to the present invention will be described in detail with reference to the accompanying drawings.

First, the method for synchronizing service details between control points according to the present invention is applied to a UPnP-based home network system, and includes a new control point in a home network to which at least one control point and devices are connected and connected. Is connected, the new control point requests and receives service details for each device through an interface with a previous control point already connected to the home network. Storage management.

For example, as shown in FIG. 3, on the home network, the first to third devices 10, 12, 14, and the first and second control points 11, 13. In this connected state, the third control point 15, which is a new control point New CP, can be connected to the home network.

The first to third control points 11, 13, and 15 may be, for example, a network module, a controller, a memory, and a user, as illustrated in FIG. 4. Interface Generator (UI Generator) is included.

Meanwhile, the controller 151 of the new third control point 15 connected to the home network controls the network module 150 to multicast a predetermined discovery message through the home network. Afterwards, a series of search operations for discovering the first and second control points 11 and 13 are performed.

And, through the interface with the first and second control points (11, 13), request and receive service description information (Service Description) information of each device that is stored and managed in the first and second control point, A series of operations for storing and managing the nonvolatile memory 152 such as a flash memory or an epyrom is performed, which will be described in detail below.

FIG. 5 is a flowchart illustrating an embodiment of a method for synchronizing service details between control points according to the present invention. As described above, the first to third devices 10.12.14 and the first to third devices in the home network are described. And when the third control point 15, which is a new control point, is connected to the home network while the second control points 11 and 13 are connected and connected, the third control point 15 determines that the third control point 15 is predetermined. By multicasting the discovery message of, the control point search operation for discovering the first and second control points 11 and 13 is performed (S11).

In the third control point 15, when the first and second control points 11 and 13 are found through the search operation (S12), each of the first and second control points is stored and managed. The service detailed information about the devices is requested (S13).

In the third control point 15, when receiving detailed service information from a plurality of control points (S14), the oldest control point is selected (S15), for example, the first control point. Receiving service detailed information about each device from the control point 11 and the second control point 13, respectively, the boot time at which the first control point 11 is booted, and the second control point 13 ) Compares the boot time, and selects the control point that was booted a long time ago.

Alternatively, the control point that has been serviced long time ago is selected by comparing the time when the service is performed by the first control point 11 with the time when the service is performed by the second control point 13.

Then, the service detailed information received from the selected control point is stored and managed (S16), and after the service control for any one device is requested through the user interface (User Interface) with the user (S17), The third controller 15 retrieves and refers to the storage-managed service detailed information and calls and controls the service of the corresponding device (S18).

Meanwhile, for example, as shown in FIG. 6, device information and service information may be linked and stored in the service detailed information. In the device information, 'CD-Player' Information about a device type such as Device Type and a service type such as 'Switch Power' is recorded.

In addition, the service information records various variable names such as 'Play Mode' and information about allowed values such as 'PLAY, PAUSE, STOP', and the like. Since information is a standard already used in UPnP-based home network systems, a detailed description thereof will be omitted.

On the other hand, in the third control point 15, for example, if no event occurs from each device for a predetermined time set in advance, or if the idle state (Idle) without a user's request ( In operation S20, an interface operation with each of the devices 10, 12, and 14 connected and connected through the home network may be performed.

After requesting and receiving service detailed information of the corresponding device through the interface with the devices, the service detailed information previously stored and managed is updated with the latest information (S21), and then the user requests The operation is performed (S22).

As a result, even when a new control point is connected to the home network, it is possible to efficiently receive and store service detailed information of each device that has been stored and managed in the previous control point, thereby increasing the communication load of the home network inefficiently. In addition, the performance of the home network system is unnecessarily deteriorated.

Or more, preferred embodiments of the present invention described above, for the purpose of illustration, those skilled in the art, within the technical spirit and the technical scope of the present invention disclosed in the appended claims below, to further improve various other embodiments Changes, substitutions or additions will be possible.

10: first device 11: first control point
12: second device 13: second control point
14: third device 15: third control point
110,130,150: network module 111,131,151: controller
112,132,152: Memory 113,133,153: UI Generator

Claims

In a UPnP-based home network system where control points and devices are connected and connected through a home network,
If a new control point is connected to the home network, step 1 of finding a previous control point that is already connected to the home network at the new control point; And
And requesting and receiving service detailed information of respective devices stored and managed in the found previous control point, and storing and managing the service detailed information in the new control point.

The method of claim 1,
And the service detailed information is description information for explaining service information supported by each device.

The method of claim 1,
In the second step, when the service detailed information is received from a plurality of control points, the service detailed information received from any one of the oldest control points is selected and stored and managed in the new control point. How to synchronize service details between control points.

The method of claim 2,
In step 2, the control points of the respective control points that have transmitted the service detailed information are checked for the booting time or the time at which the service is performed, and the service detailed information received from any one control point is selected. How to synchronize service details between points.

The method of claim 1,
And invoking a service supported by an arbitrary device by referring to the stored managed service details in the new control point.

The method of claim 1,
Requesting and receiving service detailed information of the corresponding device through an interface with a device connected through the home network when the idle state is in the new control point, and updating and storing the stored service detailed information Service detail information synchronization method between the control point, characterized in that further comprises.