WO2015160077A1

WO2015160077A1 - Method and system for sharing contents between remotely located dlna devices

Info

Publication number: WO2015160077A1
Application number: PCT/KR2015/001012
Authority: WO
Inventors: 우종현; 최정헌; 정용만; 오승욱; 배현섭
Original assignee: 슈어소프트테크주식회사
Priority date: 2014-04-15
Filing date: 2015-01-30
Publication date: 2015-10-22
Also published as: KR101496758B1

Abstract

A method for sharing contents between remotely located DLNA devices according to an embodiment comprises: multicasting a message for searching for a device for performing a DLNA function at a first DLNA device; packing the multicasted message in a TCP/IP packet; sending the packed message to another network connected to the first DLNA device via a virtual private network; receiving the packed message at the another network; changing the sender IP of the packed message to the IP of the first DLNA device; and multicasting a message including the changed IP to DLNA devices within the network, thereby allowing the first DLNA device to share contents with DLNA devices receiving the multicasted message.

Description

Method and system for sharing content between remotely located DNL devices

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

DLNA is an abbreviation of Digital Living Network Alliance. It defines an agreement to share and play various media contents (music / photo / video) regardless of the manufacturer and product type through the network. In addition, a function of sharing and playing various media contents regardless of a manufacturer and a product through a network is called a DLNA function, and a device having a DLNA function is also called a DLNA device.

Devices equipped with DLNA function can share and play various multimedia contents with each other. However, devices equipped with DLNA functions can share and play content within a limited area. For example, devices equipped with a DLNA function can share and play content only between devices existing in an area capable of performing wireless communication through one wireless network device. As such, since only devices located within the restricted area can share and play content, the range of sharing and playing content is limited within the physical distance range in which wireless communication can be performed through the network device. Therefore, there is a need for a method capable of extending the use area of content without being limited by physical distance between DLNA devices.

Embodiments can provide a method and system for sharing content between remotely located DLNA devices capable of sharing and playing content without being limited by physical distance.

In addition, it is possible to provide a method and system for sharing content between remotely located DLNA devices capable of sharing and playing content at high speed even between remotely located DLNA devices.

According to one or more exemplary embodiments, a method of sharing content between remotely located DLNA devices includes multicasting a message for searching for a device for performing a DLNA function in a first DLNA device; Wrapping the multicast message in a TCP / IP packet; Transmitting the packed message to another network connected to the first DLNA device and a virtual private network; Receiving the wrapped message at the other network; Changing the sender IP of the packed message to the IP of the first DLNA device; Multicasting the message containing the modified IP to DLNA devices in a network; And the first DLNA device sharing content with the DLNA device receiving the multicast message.

In addition, the step of wrapping the multicast message in a TCP / IP packet is located within a certain area, it may be performed by a server that performs wireless communication with the first DLNA device.

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

In the sharing of the content, the first DLNA device and the DLNA device receiving the multicast message may share the content through the virtual private network.

In an embodiment, a content sharing system between remotely located DLNA devices includes: a first DLNA device that broadcasts a message for searching for a device performing a DLNA function; A first network device network-connected with the first DLNA device and receiving the message; A second network device connected to the first network device through a virtual private network, the second network device receiving the message through the virtual private network; And a second DLNA device networked with the first DLNA device in a communication area of the second network device, and when the first DLNA device broadcasts a message for device discovery performing a DLNA function, The first network device wraps the message in a TCP / IP packet and transmits the message 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. Thereafter, the second DLNA device is transmitted to the second DLNA device, and the first DLNA device and the second DLNA device may share content through the virtual private network.

In addition, a content sharing system between remotely located DLNA devices according to another embodiment includes a first DLNA device; A first network device networked with the first DLNA device; A first server for receiving a broadcast message from the first DLNA device via the first network device; A second DLNA device; A second network device networked with the second DLNA device; And a second server configured to receive a message broadcast from the second DLNA device through the second network device, wherein the first network device and the second network device are connected through a virtual private network, When the first server and the second server each broadcast a message for device discovery for performing the DLNA function by the first DLNA device and the second DLNA device, the message is wrapped in a TCP / IP packet, and then Transmitting to the other network through a virtual private network and receiving the packed message, including the IP of the first DLNA device and the second DLNA device in the packed message, and transmitting the same within the network. The DLNA device and the second DLNA device may share content with the device receiving the packaged message through the virtual private network.

According to the method and system for sharing content between distant DLNA devices according to the embodiment, content can be shared and played without being limited by physical distance.

In addition, content can be shared and played at high speed even between remotely located DLNA devices.

1 is a diagram showing the configuration of a content sharing system between DLNA devices located at a distance according to the first embodiment.

FIG. 2 is a diagram illustrating 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 distance according to the first embodiment.

4 is a flowchart illustrating a content sharing method between DLNA devices located at a distance according to the second embodiment.

DETAILED DESCRIPTION OF THE INVENTION The following detailed description of the invention refers to the accompanying drawings that show, by way of illustration, 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 is to be understood that the various embodiments of the invention are different but need not be mutually exclusive. For example, certain shapes, structures, and characteristics described herein may be embodied in other embodiments without departing from the spirit and scope of the invention in connection with one embodiment. In addition, it is to be understood that the location or arrangement of individual components within each disclosed embodiment may be changed without departing from the spirit and scope of the invention. The following detailed description, therefore, is not to be taken in a limiting sense, and the scope of the present invention, if properly described, may be defined only by the appended claims, along with the full range of equivalents to which such claims are entitled. Like reference numerals in the drawings may refer to the same or similar functions throughout the several aspects.

DETAILED DESCRIPTION Hereinafter, exemplary 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 implement the present invention.

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

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

The first DLNA device 100 is a device equipped with a DLNA function, and the type thereof is not particularly limited. In general, the smart phone may be, but is not limited thereto, and may be a TV, a computer, a laptop, a PDA, a camera, or the like. The first DLNA device 100 and the first server 120 may be located in an area in which wireless communication may be performed 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. Since the first DLNA device 100 and the first server 120 perform wireless communication through the first network device 110, the first DLNA device 100 and the first server 120 may use the first network device ( 110 may be located within an area where wireless communication is possible. An area in which the first DLNA device 100 and the first server 120 may 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 may perform wireless communication in the “first network” through the first network device 110. Although FIG. 1 shows that only the first DLNA device 100 exists in the “first network,” another DLNA device may be additionally present. The number and type of DLNA devices 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 for automatically transmitting a message may be implemented in the first server 120. Accordingly, when the first server 120 receives a message for searching for a device existing in the “first network” from the first DLNA device 100 and the first network device 110, the first server 120 sends the received message to the first network device. Via 110, it may transmit to the "second network". The message for device discovery may be expressed as a discovery message according to the DLNA specification.

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

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

The first DLNA device 100, the first server 120, the second DLNA device 130, and the second server 150 may each have a unique IP. 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), and the IP of the second DLNA device 130 is (192.168.10.3). 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 to search for a peripheral device. When the first DLNA device 100 transmits the discovery message, the first server 120 may receive the discovery message through the first network device 110. In addition, the first server 120 may transfer the received multicast message to another network (second network) through a VPN. At this time, when the first server 120 delivers the multicast message to another network, the first server 120 may wrap the discovery message into a TCP / IP packet. The first server 120 may wrap the discovery message in a TCP / IP packet and then deliver the wrapped message to another network.

For example, when 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 is received. 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 delivered 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 the first DLNA device 100, which is a device that initially transmits the discovery message to the sender IP portion of the received discovery message. After changing to the IP, it can be transmitted 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. In this case, the second server 150 may transmit the discovery message received to other DLNA devices existing in the “second network”. The discovery message sent by the second server 150 to 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 (192.168.1.2), which is the IP of the first DLNA device 100.

In the above, the first DLNA device 100 existing in the "first network", the second DLNA device 130 in the "second network" to transmit a discovery message for the device search to perform the DLNA function 130 Although the process has been described, the process of transmitting a discovery message from the second DLNA device 130 existing in the “second network” to the first DLNA device 100 existing in the “first network” may be similarly applied. .

In general TCP / IP-based communication, when transmitting data, the device transmitting the data automatically assigns the IP value set or assigned to the device and then transmits the data to another device. And, the device receiving the data Ack. Means that the data was well received by the IP included in the data. You can send a response.

However, 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 in the far distance according to the first embodiment receives the IP value. After the change, the discovery message can be sent to other DLNA devices in the network. The discovery message is Ack. Since the message does not require a response, the first server 120 or the second server 150 that receives the discovery message from another network receives an Ack. You may not send a response.

As the discovery message is transmitted to the other network by the first server 120 or the second server 150, the first DLNA device 100 or the second DLNA device 130 that has transmitted the discovery message exists in another network. DLNA devices can be identified. If the DLNA devices present in the other network 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 a VPN connection, the DLNA devices in the "first network" and the DLNA devices in the "second network" can be directly connected to the Internet. Do. Thus, DLNA devices present in the "first network" and DLNA devices present in the "second network" can share and play content.

As described above, in the content sharing system 10 between the remotely located DLNA devices according to the first embodiment, the DLNA devices and the second network devices existing in the "first network" connected to the first network device 110 are provided. DLNA devices present in the “second network” connected with 140 may share and play content without being limited by physical distance. In addition, "first network" and "second network" are directly connected through a VPN, so only multicast messages that do not affect speed are transmitted through the server, and large content data such as video can be directly transferred between DLNA devices. By communicating, content can be shared and played at high speed. In FIG. 1, a "first network" and a "second network" are connected to each other by a VPN, but the type and number of networks that may be connected via a VPN are not necessarily limited thereto.

FIG. 2 is a diagram illustrating a configuration of a content sharing system between DLNA devices located at a long distance according to the second embodiment. Hereinafter, referring to FIG. 2, a process of operating the content sharing system 20 between DLNA devices located at a distance according to the second embodiment will be described.

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

The content sharing system 20 between the remotely located DLNA devices according to the second embodiment is different from the content sharing system 10 between the remotely located DLNA devices according to the first embodiment, and thus, the first server 120 may not be the same. And the second server 150 may not be included.

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 packing the packet in a TCP / IP packet. In this case, the first network device 210 and the second network device 240 may include agent modules 210a and 240a for transmitting discovery messages, respectively. The agent modules 210a and 240a may wrap discovery messages received from inside the network into TCP / IP packets. The discovery message may be transmitted to another network. For example, if the DLNA device that transmits the discovery message for the first time is the first DLNA device 200 and the IP of the first DLNA device 200 is (192.168.1.2), the first network device 210 may discover the discovery message. Receive a message, wrap it in a TCP / IP packet, and transmit it to the second network device 240. In addition, although the second network device 240 transmits the discovery message, the second network device 240 changes the IP of the device for transmitting the discovery message to the IP of the first DLNA device 200 (192.168.1.2). After the change, it can be transmitted in the network.

As described above, the content sharing system 20 between the remotely located DLNA devices according to the second embodiment can share and play content with DLNA devices existing in other networks without having a separate server. You can conveniently build a content sharing system.

3 is a flowchart illustrating a content sharing method between DLNA devices located at a distance according to the first embodiment. 1 and 3, a content sharing method between DLNA devices located at a far 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 that performs a DLNA function. The first DLNA device 100 of FIG. 1 may multicast a message for searching for a device performing a DLNA function in a “first area” capable of wireless communication 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 wrapped in a TCP / IP packet to another network to which the second network device 140 is connected through a VPN connected to the first network device 110. The first network device 110 and the second network device 140 may be connected by a VPN, and the first server 110 may be connected to the second network device 140 by using the first network device 110. Message to the second network ".

In operation 330, the second server 150 receives a message. The second server 150 connected to the second network device 140 may receive a 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 the first DLNA device 200. The second server 150 transmits the received message to a second DLNA device and another DLNA device existing in the "second network" which performs wireless communication via the second network.

In operation 350, the first DLNA device 100 shares and plays content with the discovered DLNA device. In operation 340, when the DLNA devices existing in the “second network” are discovered in the first DLNA device 100, the first DLNA device 100 may share content with the discovered DLNA devices through a VPN. By reproducing, the DLNA function can be performed.

As described above, according to the content sharing method between the DLNA devices located in the far distance according to the first embodiment, the content can be shared and played back through a VPN after searching for DLNA devices existing in another network. Can be extended. In addition, the speed of sharing and playing content is not reduced.

4 is a flowchart illustrating a content sharing method between DLNA devices located at a distance according to the second embodiment. Hereinafter, referring to FIGS. 2 and 4, a content sharing method between DLNA devices located at a far distance according to a second embodiment will be described.

In operation 400, the first DLNA device 200 multicasts a message for searching for a device that performs a 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 a message and packages the received message in a TCP / IP packet. The first network device 210 may wrap the message in a TCP / IP packet before transmitting the received message. In step 420, the first network device 210 may forward the message to the first network device 210. The second network device 240 transmits to another 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 a VPN, and the first network device 210 may transmit a message to the “second network” to which the second network device 240 is connected. .

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

In operation 440, the second network device 240 changes the IP of the received message as if it is the first DLNA device 200 so that another DLNA located in the “second network” connected to the second network device 240 may be connected. To the device. The second network device 240 transmits the received message to the second DLNA device 230 and other DLNA devices present in the “second network” for performing wireless communication.

In operation 450, the first DLNA device 200 shares and plays content with the found DLNA device. In operation 440, when DLNA devices existing in the “second network” are searched for in the first DLNA device 200, the first DLNA device 200 may share content with the discovered DLNA devices through a VPN. By reproducing, the DLNA function can be performed.

As described above, according to the content sharing method between the DLNA devices located in the far distance according to the second embodiment, since the DLNA devices existing in the other network can be searched for, the content can be shared and played back through the VPN. Can be extended. In addition, the speed of sharing and playing content is not reduced. And, as with the first server and the second server, it is possible to build a content sharing system without having additional devices.

Meanwhile, the method of sharing content between remotely located DLNA devices according to the 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 program instructions, data files, data structures, etc. alone or in combination. The recording medium may be one specially designed and configured for the embodiment or be known and available to those skilled in computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical recording media such as CD-ROMs, DVDs, magnetic-optical media such as floppy disks, and ROM, RAM, flash memory, and the like. Hardware devices specifically configured to store and execute program instructions are included. Examples of program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like.

[Description of the code]

10, 20: Content sharing system between remotely located DLNA devices

100, 200: first DLNA device

110, 210: first network device

120: first server

130, 230: second DLNA device

140, 240: second network device

150: second server

Claims

Multicasting a message for searching for a device for performing a DLNA function in a first DLNA device;

Wrapping the multicast message in a TCP / IP packet;

Transmitting the packed message to another network connected to the first DLNA device and a virtual private network;

Receiving the wrapped message at the other network;

Changing the sender IP of the packed message to the IP of the first DLNA device;

Multicasting the message containing the modified IP to DLNA devices in a network; And

And sharing the content with a DLNA device that receives the multicast message, wherein the first DLNA device comprises content sharing between remotely located DLNA devices.
2. The method of claim 1, wherein wrapping the multicast message in a TCP / IP packet

A method for sharing content between remotely located DLNA devices located within a predetermined area and performed by a server performing wireless communication with the first DLNA device.
2. The method of claim 1, wherein wrapping the multicast message in a TCP / IP packet

A method of sharing content between remotely located DLNA devices connected to the first DLNA device by a network and performed by a first network device supporting wireless communication of the first DLNA device.
The method of claim 1, wherein sharing the content comprises

The first DLNA device and the DLNA device receiving the multi-cast message is a content sharing method between the DLNA devices located in the far distance sharing the content through the virtual private network.
A first DLNA device that broadcasts a message for device discovery performing a DLNA function;

A first network device network-connected with the first DLNA device and receiving the message;

A second network device connected to the first network device through a virtual private network, the second network device receiving the message through the virtual private network; And

A second DLNA device networked with the first DLNA device in a communication area of the second network device,

If the first DLNA device broadcasts a message for device discovery that performs a DLNA function,

The first network device wraps the message in a TCP / IP packet and transmits the message 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 to the second DLNA device,

And the first DLNA device and the second DLNA device share content between remotely located DLNA devices that share content through the virtual private network.
A first DLNA device;

A first network device networked with the first DLNA device;

A first server for receiving a broadcast message from the first DLNA device via the first network device;

A second DLNA device;

A second network device networked with the second DLNA device; And

A second server, via the second network device, receiving a broadcast message from the second DLNA device;

The first network device and the second network device are connected through a virtual private network,

When the first server and the second server broadcast the message for device discovery for performing the DLNA function by the first DLNA device and the second DLNA device, the message is wrapped in a TCP / IP packet. Transmitting to the other network through the virtual private network and receiving the packed message, including the IP of the first DLNA device and the second DLNA device in the packed message, and transmitting the same within the network. The first DLNA device and the second DLNA device is a content sharing system between the device receiving the packaged message and the DLNA device located in the remote sharing content via the virtual private network.