KR101496758B1 - The method and system for sharing contents among DLNA devices mutually spaced at a long distance - Google Patents

The method and system for sharing contents among DLNA devices mutually spaced at a long distance Download PDF

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Publication number
KR101496758B1
KR101496758B1 KR20140044686A KR20140044686A KR101496758B1 KR 101496758 B1 KR101496758 B1 KR 101496758B1 KR 20140044686 A KR20140044686 A KR 20140044686A KR 20140044686 A KR20140044686 A KR 20140044686A KR 101496758 B1 KR101496758 B1 KR 101496758B1
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South Korea
Prior art keywords
dlna
network
message
dlna device
server
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KR20140044686A
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Korean (ko)
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우종현
최정헌
정용만
오승욱
배현섭
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슈어소프트테크주식회사
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Priority to KR20140044686A priority Critical patent/KR101496758B1/en
Priority to PCT/KR2015/001012 priority patent/WO2015160077A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/64—Hybrid switching systems
    • H04L12/6418—Hybrid transport

Abstract

A method for sharing content among DLNA devices mutually separated in a long distance according to an embodiment may: multicast, by a first DLNA device, a message for searching for a device for performing a DLNA function; pack the multicast message with a TCP/IP packet; transmit the packed message to another network connected to the first DLNA device through a virtual private network; receive the packed message from the other network; change the sender IP of the packed message to the IP of the first DLNA device; multicast a message including the changed IP to the DLNA devices in a network; and then share, by the first DLNA device, content with a DLNA device receiving the multicast message.

Description

[0001] The present invention relates to a method and system for content sharing between remote DLNA devices,

Embodiments relate to a method and system for content sharing between DLNA devices located remotely.

DLNA is an abbreviation of Digital Living Network Alliance. It is a group that defines protocols for sharing and reproducing various media contents (music / photo / video) regardless of manufacturer and product type through DLNA certified network. In addition, the function of sharing and reproducing various media contents regardless of the manufacturer and product type is called a DLNA function through a network, and a device equipped with a DLNA function is also referred to as a DLNA device.

Devices equipped with DLNA function can share and play various multimedia contents with each other. However, devices equipped with the DLNA function can share and reproduce contents within a limited area. For example, devices equipped with the DLNA function can share and reproduce contents only among devices existing in a region capable of performing wireless communication through one wireless network device. As such, only devices located within a restricted area can share and play content, so that the range of content sharing and playback is limited to within the physical distance range that can perform wireless communication through the network device. Therefore, there is a demand for a method of expanding the use area of the content without being limited by the physical distance between the DLNA devices.

Embodiments may provide a method and system for content sharing between DLNA devices located remotely that can share and reproduce content without being limited by physical distance.

Also, it is possible to provide a content sharing method and system between DLNA devices located at a remote location that can share and reproduce contents at a high speed even among DLNA devices located at a remote location.

A method of sharing content between DLNA devices located at a remote location according to an embodiment includes: multicasting a message for searching for a device for performing DLNA function in a first DLNA device; Packing the multicasted message into a TCP / IP packet; Transmitting the wrapped message to another network connected to the first DLNA device and a virtual private network; Receiving the packaged message from the other network; Changing a sender IP of the packaged message to an IP of the first DLNA device; Multicasting a message including the changed IP to DLNA devices in the network; And the first DLNA device may include the step of sharing content with a DLNA device receiving the multicasted message.

The step of packing the multicasted message into the TCP / IP packet may be performed by a server that is located within a predetermined area and performs wireless communication with the first DLNA device.

The step of packing the multicasted message into TCP / IP packets may be performed by a first network device connected to the first DLNA device and supporting wireless communication of the first DLNA device.

In addition, in the sharing of the content, the DLNA device that receives the multicast message and the first DLNA device may share the content through the virtual private network.

A content sharing system between remote DLNA devices according to an embodiment includes a first DLNA device for broadcasting a message for searching for a device performing DLNA function; A first network device connected to the first DLNA device and receiving the message; A second network device connected to the first network device via a virtual private network and receiving the message through the virtual private network; And a second DLNA device connected to the first DLNA device in a communication area of the second network device. When the first DLNA device broadcasts a message for searching for a device performing the DLNA function, 1 network device packs the message into a TCP / IP packet and sends it to the second network device, and the second network device changes the sender IP portion of the received message to the IP of the first DLNA device To the second DLNA device, and the first DLNA device and the second DLNA device may share content through the virtual private network.

Also, a content sharing system between DLNA devices located remotely according to another embodiment includes a first DLNA device; A first network device networked with the first DLNA device; A first server for receiving, via the first network device, a message broadcast from the first DLNA device; A second DLNA device; A second network device networked with the second DLNA device; And a second server for receiving a broadcast message from the second DLNA device through the second network device, wherein the first network device and the second network device are connected via a virtual private network, 1 server and the second server respectively pack the message into a TCP / IP packet when the first DLNA device and the second DLNA device broadcast a message for searching for a device to perform a DLNA function, Transmitting the packaged message to the first DLNA device and the second DLNA device, and transmitting the packaged message to the first network through the virtual private network; and upon receiving the packaged message, The DLNA device and the second DLNA device may share content through the virtual private network with the device that received the packaged message.

According to the method and system for sharing contents between DLNA devices located at a long distance according to the embodiment, content can be shared and reproduced without being limited by physical distance.

In addition, content can be shared and played back at a high speed even among DLNA devices located at a remote location.

1 is a diagram showing a configuration of a content sharing system between DLNA devices located at a long distance according to the first embodiment.
2 is a diagram showing a configuration of a content sharing system between DLNA devices located at a long distance according to the second embodiment.
3 is a flowchart illustrating a content sharing method between DLNA devices located at a long distance according to the first embodiment.
4 is a flowchart illustrating a content sharing method between DLNA devices located at a remote location according to the second embodiment.

The following detailed description of the invention refers to the accompanying drawings, which illustrate, by way of example, specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that the various embodiments of the present invention are different, but need not be mutually exclusive. For example, certain features, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the invention in connection with one embodiment. It is also to be understood that the location or arrangement of the individual components within each disclosed embodiment may be varied without departing from the spirit and scope of the present invention. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present invention may be limited only by the appended claims, along with the full scope of equivalents to which the claims are entitled, if properly explained. In the drawings, like reference numbers may refer to the same or similar functions throughout the several views.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, so that those skilled in the art can easily carry out the present invention.

1 is a diagram showing a configuration of a content sharing system between DLNA devices located at a long distance according to the first embodiment. Hereinafter, the operation of the content sharing system 10 between the DLNA devices located at a long distance according to the first embodiment will be described with reference to FIG.

A content sharing system 10 between DLNA devices located at a distance according to the first embodiment includes a first DLNA device 100, a first network device 110, a first server 120, a second DLNA device 130 ), A second network device 140, and a second server 150.

The first DLNA device 100 is a device equipped with a DLNA function, and its type is not particularly limited. In general, it may be a smart phone, but it is not necessarily limited to a TV, a computer, a notebook, a PDA, a camera, and the like. The first DLNA device 100 and the first server 120 may be located in a region capable of performing wireless communication through the first network device 110. [

The first network device 110 may support communication between the first DLNA device 100 and the first server 120. [ For example, a wired / wireless Internet router supporting wireless communication between the first DLNA device 100 and the first server 120 may be used as the first network device 110. The first DLNA device 100 and the first server 120 perform wireless communication through the first network device 110 so that the first DLNA device 100 and the first server 120 can communicate with the first network device 110 110 in a wireless communication enabled area. The area in which the first DLNA device 100 and the first server 120 can perform wireless communication through the first network device 110 may be referred to as a "first network ". That is, the first DLNA device 100 and the first server 120 can perform wireless communication in the "first network" through the first network device 110. [ Although only the first DLNA device 100 is present in the "first network" in FIG. 1, other DLNA devices may be additionally present. The number and type of DLNA devices to be added are not particularly limited.

The first server 120 may transmit data received from the first DLNA device 100 to the outside of the "first network" through the first network device 110. [ An agent program that automatically transmits a message to the first server 120 may be implemented. Accordingly, when the first server 120 receives a message for device search in the "first network" from the first DLNA device 100 and the first network device 110, To the "second network" The message for device discovery may be represented by a Discovery message according to the DLNA specification.

The second DLNA device 130, the second network device 140 and the second server 150 have the same structure as the first DLNA device 100, the first network device 110 and the first server 120 . Therefore, a detailed description thereof will be omitted. The area in which the second DLNA device 130 and the second server 150 can perform wireless communication through the second network device 140 may be referred to as a "second network ". The "first network" and "second network" may be physically spaced apart.

The first network device 110 and the second network device 140 may be connected through a VPN (Virtual Private Network). Accordingly, the first DLNA device 100 and the second DLNA device 130 can transmit and receive data through the VPN. For example, the first DLNA device 100 and the second DLNA device 130 may transmit and receive a message for searching for a peripheral device, DLNA-related data, and content.

The first DLNA device 100, the first server 120, the second DLNA device 130, and the second server 150 may have unique IPs. For example, the IP of the first DLNA device 100 is 192.168.1.2, the IP of the first server 120 is 192.168.1.3, the IP of the second DLNA device 130 is 192.168.10.3, , And the IP of the second DLNA device 130 may be (192.168.10.2).

The first DLNA device 100 may search for a peripheral device capable of performing the DLNA function. The first DLNA device 100 may transmit a discovery message for a peripheral device search. When the first DLNA device 100 transmits a discovery message, the first server 120 can receive the discovery message through the first network device 110. [ Then, the first server 120 may forward the received multicast message to another network (second network) through the VPN. At this time, when the first server 120 delivers the multicast message to another network, the first server 120 may package the discovery message as a TCP / IP packet. The first server 120 may package the discovery message into a TCP / IP packet and then forward the packaged message to another network.

For example, if the IP of the first DLNA device 100 is (192.168.1.2) and the IP of the first server 120 is (192.168.1.3), the multicast received from the first DLNA device 100 After changing the sender IP portion of the message to the IP of the first DLNA device 100 (192.168.1.2), the discovery message may be forwarded to the "second network" via the VPN.

The second server 150 located in the "second network" receives the discovery message from the " first network ", and transmits the discovery message part of the received Discovery message to the first DLNA device 100, To the second DLNA device 130 existing in the "second network ". Within the "second network" there may be additional DLNA devices in addition to the second DLNA device 130. At this time, the second server 150 can transmit the received discovery message to other DLNA devices existing in the "second network ". The discovery message transmitted by the second server 150 to the DLNA devices in the "second network" may include the IP of the first DLNA device 100. [ For example, if the IP of the first DLNA device 100 is (192.168.1.2), the discovery message may include the IP of the first DLNA device 100 (192.168.1.2).

As described above, in the first DLNA apparatus 100 existing in the " first network ", a discovery message for searching for a device performing the DLNA function is transmitted to the second DLNA apparatus 130 existing in the "second network" The process of transmitting the discovery message to the first DLNA device 100 existing in the "first network " in the second DLNA device 130 existing in the" second network " .

In general TCP / IP-based communication, when data is transmitted, the device that transmits data automatically assigns the IP value set or assigned to the device to the data, and then transmits the data to another device. And, the device that receives the data is the Ack which means that the data is well received by the IP included in the data. Response can be transmitted.

However, when the first server 120 or the second server 150 receiving the discovery message transmitted from another network in the content sharing system 10 between the DLNA devices located at a long distance according to the first embodiment transmits the IP value After making the change, you can send the discovery message to another DLNA device in the network. The discovery message is Ack. The first server 120 or the second server 150 that has received the discovery message from another network can not acknowledge the Ack message. It may not transmit a response.

The first DLNA device 100 or the second DLNA device 130 that has transmitted the discovery message may exist in another network because the discovery message is transmitted to another network by the first server 120 or the second server 150 DLNA < / RTI > Then, when DLNA devices existing in other networks are identified, the identified DLNA devices can recognize the IP of the DLNA device that transmitted the discovery message. Since the "first network" and the "second network" are connected through the VPN connection, the DLNA devices existing in the "first network" and the DLNA devices existing in the "second network" Do. Thus, the DLNA devices existing in the " first network "and the DLNA devices present in the" second network " can share and reproduce the content.

As described above, in the content sharing system 10 between the DLNA devices located at a long distance according to the first embodiment, the DLNA devices existing in the "first network" connected to the first network device 110, The DLNA devices existing in the "second network" connected to the network 140 can share and reproduce the contents without being restricted by the physical distance. In addition, the "first network" and the "second network" are directly connected through the VPN, only the multicast message that does not affect the speed is transmitted through the server, and the content data having a large capacity such as moving image is directly transmitted By communicating, content can be shared and played at a high speed. Although FIG. 1 shows a case where the "first network" and the "second network" are connected by a VPN, the types and the number of networks that can be connected through the VPN are not limited thereto.

2 is a diagram showing a configuration of a content sharing system between DLNA devices located at a long distance according to the second embodiment. Hereinafter, the operation of the content sharing system 20 between the DLNA devices located at a remote location according to the second embodiment will be described with reference to FIG.

The content sharing system 20 between the DLNA devices located at a distance according to the second embodiment includes the first DLNA device 200, the first network device 210, the second DLNA device 230 and the second network device 240).

The content sharing system 20 between the DLNA devices located at a distance according to the second embodiment is different from the content sharing system 10 between the DLNA devices located at a distance according to the first embodiment, And the second server 150 may be omitted.

When the first network device 210 and the second network device 240 respectively transmit the received discovery message to another network, the first network device 210 and the second network device 240 may transmit the discovery message after wrapping the received discovery message in a TCP / IP packet. In this case, the first network device 210 and the second network device 240 may each include an agent module 210a and 240a for transmitting a discovery message. The agent modules 210a and 240a can package the discovery message received from the inside of the network into TCP / IP packets. Then, the discovery message can be transmitted to another network. For example, if the first DLNA device transmitting the discovery message is the first DLNA device 200 and the IP of the first DLNA device 200 is (192.168.1.2), then the first network device 210 sends a discovery message And then transmits the packet to the second network device 240 after wrapping the TCP / IP packet. Then, the second network device 240 transmits the discovery message to the first DLNA device 200 (192.168.1.2) even though the second network device 240 transmits the discovery message After the change, it can be transmitted within the network.

As described above, the contents sharing system 20 between the DLNA devices located at a long distance according to the second embodiment can share and reproduce contents with the DLNA devices existing in other networks without having a separate server, A content sharing system can be conveniently constructed.

3 is a flowchart illustrating a content sharing method between DLNA devices located at a long distance according to the first embodiment. Hereinafter, with reference to FIG. 1 and FIG. 3, a content sharing method between DLNA devices located at a long distance according to the first embodiment will be described.

In operation 300, the first DLNA device 100 multicasts a message for searching for a device performing the DLNA function. The first DLNA apparatus 100 of FIG. 1 may multicast a message for searching for a device performing a DLNA function in a "first area " where wireless communication is possible through the first network device 110. [

In operation 310, the first server 120 receives the message and packages the received message in a TCP / IP packet. The first server 120 may wrap the message in a TCP / IP packet before transmitting the received message to another network.

In operation 320, the first server 120 transmits a message packed with a TCP / IP packet to another network to which the second network device 140 is connected through a VPN connected with the first network device 110. The first network device 110 and the second network device 140 may be connected by VPN and the first server 110 may use the first network device 110 to connect the second network device 140 to the &Quot; second network ".

In operation 330, the second server 150 receives the message. The second server 150 connected to the second network device 140 may receive the message transmitted from the first server 120. [

In operation 340, the second server 150 transmits the received message to another DLNA device through the second network device 140 by changing the IP as if it is one DLNA device 200. The second server 150 transmits the received message to the second DLNA device and the other DLNA devices existing in the "second network " performing wireless communication via the second network.

In operation 350, the first DLNA device 100 shares and reproduces the content with the searched DLNA device. In operation 340, when the DLNA devices existing in the "second network" are retrieved in the first DLNA device 100, the first DLNA device 100 may share and share content with the retrieved DLNA devices through the VPN Playback, and DLNA function can be performed.

As described above, according to the content sharing method between DLNA devices located at a long distance according to the first embodiment, it is possible to share and reproduce contents through a VPN after searching for DLNA devices existing in another network, . Also, the speed of content sharing and playback is not reduced.

4 is a flowchart illustrating a content sharing method between DLNA devices located at a remote location according to the second embodiment. Hereinafter, with reference to FIGS. 2 and 4, a method of sharing contents among DLNA devices located at a remote location according to the second embodiment will be described.

In operation 400, the first DLNA device 200 multicasts a message for searching for a device performing the DLNA function. The first DLNA device 200 of FIG. 2 may multicast a message for searching for a device performing a DLNA function in an area where wireless communication is possible through the first network device 210.

In operation 410, the first network device 210 receives the message and packages the received message into a TCP / IP packet. The first network device 210 may wrap the message in the TCP / IP packet before transmitting the received message. In operation 420, the first network device 210 transmits the message to the first network device 210. In operation 420, To the other network to which the second network device 240 is connected. The first network device 210 and the second network device 240 may be connected by VPN and the first network device 210 may transmit the message to the "second network" to which the second network device 240 is connected .

In operation 430, the second network device 240 receives the message. The second network device 240 may receive the message transmitted from the first network device 210.

In operation 440, the second network device 240 changes the IP address of the received message to be the first DLNA device 200 and transmits the received DLNA message to another DLNA 200 located in the "second network" Lt; / RTI > The second network device 240 transmits the received message to the second DLNA device 230 and the other DLNA devices present in the "second network" that performs wireless communication.

In operation 450, the first DLNA device 200 shares and plays the content with the searched DLNA device. In operation 440, when the first DLNA device 200 is found in the "second network ", the first DLNA device 200 may share the content with the retrieved DLNA devices through the VPN Playback, and DLNA function can be performed.

As described above, according to the content sharing method between remote DLNA devices according to the second embodiment, it is possible to share and reproduce contents through a VPN after searching for DLNA devices existing in other networks, . Also, the speed of content sharing and playback is not reduced. A content sharing system can be constructed without an additional device, such as a first server and a second server.

Meanwhile, a content sharing method between remote DLNA devices according to an embodiment may be implemented through a computer-readable recording medium including program instructions for performing various computer-implemented operations. The computer-readable recording medium may include a program command, a data file, a data structure, and the like, alone or in combination. The recording medium may be those specially designed and constructed for the embodiments or may be those known to those skilled in the computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape, optical recording media such as CD-ROMs and DVDs, magnetic-optical media such as floppy disks, and magnetic and optical media such as ROMs, And hardware devices specifically configured to store and execute program instructions. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like.

10, 20: a content sharing system between DLNA devices located remotely
100, 200: first DLNA device
110, 210: a first network device
120: first server
130, 230: the second DLNA device
140, 240: second network device
150: second server

Claims (6)

Multicasting a message for searching for a device for performing a DLNA function in a first DLNA device;
Packing the multicasted message into a TCP / IP packet;
Transmitting the wrapped message to another network connected to the first DLNA device and a virtual private network;
Receiving the packaged message from the other network;
Changing a sender IP of the packaged message to an IP of the first DLNA device;
Multicasting a message including the changed IP to DLNA devices in the network; And
Wherein the first DLNA device shares content with a DLNA device that receives the multicasted message. The method of claim 1, wherein packing the multicasted message into a TCP / IP packet comprises:
A method for content sharing between remote DLNA devices located within a predetermined area and performed by a server performing wireless communication with the first DLNA device. The method of claim 1, wherein packing the multicasted message into a TCP / IP packet comprises:
And a first network device connected to the first DLNA device through a network and supporting wireless communication of the first DLNA device. 2. The method of claim 1, wherein sharing the content comprises:
Wherein the first DLNA device and the DLNA device receiving the multicast message share the content through the virtual private network. A first DLNA device for broadcasting a message for device discovery performing a DLNA function;
A first network device connected to the first DLNA device and receiving the message;
A second network device connected to the first network device via a virtual private network and receiving the message through the virtual private network; And
And a second DLNA device in network communication with the first DLNA device in a communication area of the second network device,
If the first DLNA device broadcasts a message for device search to perform the DLNA function,
Wherein the first network device packs the message into a TCP / IP packet and transmits the packet to the second network device,
The second network device changes the sender IP portion of the received message to the IP of the first DLNA device and then transmits the IP to the second DLNA device,
Wherein the first DLNA device and the second DLNA device share content over the virtual private network. A first DLNA device;
A first network device networked with the first DLNA device;
A first server for receiving, via the first network device, a message broadcast from the first DLNA device;
A second DLNA device;
A second network device networked with the second DLNA device; And
And a second server receiving, via the second network device, a message broadcast from the second DLNA device,
Wherein the first network device and the second network device are connected via a virtual private network,
When the first DLNA device and the second DLNA device respectively broadcast a message for searching for a device to perform a DLNA function, the first server and the second server respectively pack the message into a TCP / IP packet And transmits the packaged message to the first DLNA device and the second DLNA device via the virtual private network, and transmits the packaged message to the first DLNA device and the second DLNA device when the packaged message is received, Wherein the first DLNA device and the second DLNA device are devices remote from the device sharing the content through the virtual private network with the device receiving the packaged message.
KR20140044686A 2014-04-15 2014-04-15 The method and system for sharing contents among DLNA devices mutually spaced at a long distance KR101496758B1 (en)

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PCT/KR2015/001012 WO2015160077A1 (en) 2014-04-15 2015-01-30 Method and system for sharing contents between remotely located dlna devices

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Citations (4)

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Publication number Priority date Publication date Assignee Title
KR20070048922A (en) * 2005-11-07 2007-05-10 한국전자통신연구원 System and its method for media contents sharing over inter-homenetwork
KR20070101465A (en) * 2006-04-10 2007-10-17 삼성전자주식회사 Method for sharing contents using digital living network alliance network
KR20130022224A (en) * 2011-08-25 2013-03-06 주식회사 팬택 Apparatus for sharing contents
KR20140015900A (en) * 2012-07-26 2014-02-07 모어플 주식회사 Contents sharing method based on dlna controled by media server

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20070048922A (en) * 2005-11-07 2007-05-10 한국전자통신연구원 System and its method for media contents sharing over inter-homenetwork
KR20070101465A (en) * 2006-04-10 2007-10-17 삼성전자주식회사 Method for sharing contents using digital living network alliance network
KR20130022224A (en) * 2011-08-25 2013-03-06 주식회사 팬택 Apparatus for sharing contents
KR20140015900A (en) * 2012-07-26 2014-02-07 모어플 주식회사 Contents sharing method based on dlna controled by media server

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