KR101940725B1 - Method of error handling between DLNA devices and method of media streaming service using the same - Google Patents

Abstract

DLNA Supports TCP Socket connection request with IP address and port number of media server that can be recognized when interconnecting devices. That is, the connection error processing method of the present invention includes: establishing a network connection between the first and second DLNA-enabled devices; The first DLNA-enabled device transmits a TCP socket connection request to an IP address and a port number of the second DLNA-enabled device, and the first DLNA-enabled device receives a TCP socket connection confirmation from the second DLNA- Periodically repeating steps < RTI ID = 0.0 > And terminating the DLNA application operating in the first DLNA-enabled device if the TCP socket connection acknowledgment is not received for a predetermined period of time in the repeating step.

Description

TECHNICAL FIELD The present invention relates to an error handling method between a DLNA device and a media streaming service using the DLNA device,

The present invention relates to an error processing method between DLNA devices and a media streaming service method using the same.

In addition to the emergence of smartphones, there is growing interest in sharing various media contents such as TV, computer, NAS, and camera.

DLNA (Digital Living Network Alliance) has been established and set up standards for the sharing of media contents in accordance with these demands. Through the DLNA certified products, various media contents (music / Pictures / videos) can be shared and played.

FIG. 1 shows an example of a system sharing media using the DLNA standard, and FIG. 2 shows a DLNA apparatus classification.

As shown in FIG. 1, various devices in the same IP band share content with each other through a network such as Ethernet, Wi-Fi, and Bluetooth, not through a physical connection with each other through a network.

DLNA devices are divided into Home Network Devices (HND) and Mobile Handheld Devices (MHD), and Home Interoperability Devices (MIU, M-NCF) for HND and MHD interconnection have been added.

Among them, Digital Media Server (DMS) is a device that has contents to actually share. It stores the contents and distributes / transmits the contents contents when accessing the network, so that other devices can use the contents.

The Digital Media Controller (DMC) finds a list of content distributed by the Media Server and links it to another device (Render) that can run it. The Digital Media Controller basically establishes a connection between the Media Server and the Media Renderer and controls the behavior associated with content playback.

Digital Media Renderer (DMR) is a device that is connected to Media Server by Media Controller and can play content from Media Server.

Digital Media Player (DMP) is a device that can search contents list distributed by Media Server, select content and play it.

Among the Mobile Handheld Devices, Mobile Digital Media Server (M-DMS), Mobile Digital Media Controller (M-DMC) and Mobile Digital Media Player (M-DMP) are mobile devices that have the same functions as DMS, DMC and DMP of HND .

3 is a diagram illustrating media streaming using a DLNA-enabled device.

3, media is streamed from a DLNA-enabled media server device (DMS / M-DMS) 100 to a DLNA-supported media player device (DMP / M-DMP) The media can be played back.

However, when the streaming service as shown in FIG. 3 is used, it is not possible to determine whether the connected device and the normal service are provided at the time of use after the connection, so that the DLNA capable player (DMP / M- There is a problem of waiting in an infinite loop.

The following error conditions occur when using the streaming service.

1) Abnormal termination of media server (DMS / M-DMS) of DLNA supported device

2) Forced termination of media server (DMS / M-DMS) of DLNA supported device

3) DLNA-enabled device disconnects the network (WiFi) connection

   - When the user turns off the WiFi of the device

   - When WiFi signal weakens or turns off when entering power saving mode

4) If the battery of DLNA supported device is forcibly removed or discharged by the user

DISCLOSURE Technical Problem The present invention has been made in view of the technical background as described above, and it is an object of the present invention to provide a DLNA capable player (DMP / M-DMP) And a media streaming service method using the media streaming service method.

Another object of the present invention is to provide a method for checking an error state in a connection between devices belonging to the DLNA device class.

In order to solve such a problem, in the present invention, a TCP Socket connection request is sent to an IP address and a port number of a media server, which are known at the time of inter-connection between DLNA supporting devices, and a connection error is detected and processed by receiving an Ack.

That is, a connection error handling method according to an aspect of the present invention includes: establishing a network connection between first and second DLNA-enabled devices; The first DLNA-enabled device transmits a TCP socket connection request to an IP address and a port number of the second DLNA-enabled device, and the first DLNA-enabled device receives a TCP socket connection confirmation from the second DLNA- Periodically repeating steps < RTI ID = 0.0 > And terminating the DLNA application operating in the first DLNA-enabled device if the TCP socket connection confirmation is not received for a predetermined period of time in the repeating step.

Here, the first DLNA supporting device may be a DLNA supporting media player device, and the second DLNA supporting device may be a DLNA supporting media server device.

In addition, the first DLNA-enabled device may be an AV system for DLNA-enabled vehicles, and the second DLNA-supported device may be a DLNA-supported smartphone.

According to another aspect of the present invention, there is provided a media streaming service method for a vehicle AV system, the method comprising: establishing a network connection with a DLNA server device; Receiving content from the DLNA server device; Reproducing the received content; Transmitting a TCP socket connection request to an IP address and a port number of the DLNA server device; Checking whether a TCP socket connection ACK is received from the DLNA server device; And terminating the DLNA player application when it is determined that the TCP socket connection ACK is not received in the checking step.

According to another aspect of the present invention, there is provided a media streaming service method comprising: establishing a network connection with a DLNA server device; Receiving content from the DLNA server device; Reproducing the received content; Transmitting a TCP socket connection request to an IP address and a port number of the DLNA server device; Checking whether a TCP socket connection ACK is received from the DLNA server device; And terminating the DLNA player application when the TCP socket connection ACK received in the checking step corresponds to an error including a connection failure, a no response, and a connection refuse.

According to the present invention, an error situation that may occur when establishing a connection between DLNA-enabled devices and providing a service is appropriately handled, and problems such as an abnormal operation of an opposite device and an infinite loop waiting can be solved.

1 shows an example of a system for sharing media using the DLNA standard.
Figure 2 shows the DLNA device classification.
3 is a diagram illustrating media streaming using a DLNA-enabled device.
4 is a diagram illustrating a TCP socket connection checking method according to an embodiment of the present invention.
5 is a flowchart illustrating a DLNA media server error processing method according to an embodiment of the present invention.
6 is a flowchart illustrating a media streaming service method according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. It is noted that the terms "comprises" and / or "comprising" used in the specification are intended to be inclusive in a manner similar to the components, steps, operations, and / Or additions.

Hereinafter, an error processing method between DLNA devices according to an embodiment of the present invention and a media streaming service method using the same will be described in detail with reference to the accompanying drawings.

4 is a diagram illustrating a TCP socket connection checking method according to an embodiment of the present invention.

According to the specification of DLNA / UPnP, when media server (DMS / M-DMS) device and player device (DMP / M-DMP) are connected to each other, IP address and port number of media server can be known according to TCP / , And can exchange data with each other through TCP Socket connection with this IP address and port.

In an error processing method between DLNA devices according to an embodiment of the present invention, an error is processed by checking the connection status using the error.

4, the device 100 supporting the DLNA media server (DMS / M-DMS) is connected on the same network as the device 200 supporting the DLNA player (DMP / M-DMP) When the multimedia data provided by the media server 100 is reproduced by streaming from the player 200 or when searching for a content list to be shared (S410), a TCP Socket Connect Request is sent periodically (S420) (TCP Socket Connect Ack) (S430) to perform the TCP socket connectability check.

When the media server 100 is abnormally or forcibly terminated when the TCP socket connection check is performed, an error (connection failure, no response, connection refuse, etc.) based on the standard TCP / IP specification is received from the media server device 100 in response to an ACK .

In addition, when the network connection is released, an error such as a TCP socket connection timeout or fail occurs at the terminal of the player device 200 performing the TCP socket connection request.

When such a TCP connection error occurs, the player device 200 receives an error response of the network TCP socket processing terminal and performs appropriate error processing or notifies the user of the error.

5 is a flowchart illustrating a DLNA media server error processing method according to an embodiment of the present invention.

5, the network is connected (S510). When the player (DMP / M-DMP) is executed (S520), the media server (DMS / M-DMS) device is searched and connected (S530).

If the connection to the media server is successful (YES in S540), media search and streaming playback are performed (S550).

At this time, the media server status is checked through a periodic TCP socket connection attempt as described with reference to FIG. 4 (S560). If the media server status is normal, the playback is continued until the playback is completed (Yes in S570). If the media server status is abnormal, the media player is terminated.

6 is a flowchart illustrating a media streaming service method according to an embodiment of the present invention.

6, a DLNA-enabled media server device (DMS / M-DMS) (for example, a smartphone) 100 and a DLNA-supported player device DMP / M- The network connection (WiFi / Ethernet) is established between the DLNA-enabled devices 100 and 200 in step S610 and the DLNA application (media server and player) is executed on the DLNA enabled devices 100 and 200 in steps S612 and S614.

The media server 100 notifies the presence of the player 200 to the presence of the player 200 (Notify, S616), the player 200 performs device search (M-Search, S618) (S620), accesses the media server 100 (S622), and searches the media (S624).

The media server 100 responds to the content list (S626). Upon receiving a media playback request from the player 200 (S628), the media server 100 starts media streaming transmission (S630).

The player 200 periodically transmits a TCP Socket Connect Request during playback of the streamed media (S632) (S634), and the media server 100 responds with TCP Socket Connect Success (S636).

When an error such as abnormal / forced termination or network connection cancellation occurs in the media server 100 in step S638, the player 200 does not receive a response to the TCP Socket Connect Request (S640) S642). Thus, the player ends (S644).

In the above-described embodiment, a vehicle AV system is exemplified as a DLNA-enabled media server device as a smartphone and a DLNA-supporting player device. However, the error processing method according to an embodiment of the present invention is not limited to this, It can be used to check and handle error conditions in the connections between devices.

According to the embodiment of the present invention as described above, it is possible to appropriately process an error situation that may occur when establishing a connection between a DLNA-enabled device and providing a service, and solve problems such as an abnormal operation of the external device end and an infinite loop waiting have.

While the invention has been described in terms of the preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. Accordingly, the appended claims are intended to embrace all such modifications and variations as fall within the true spirit of the invention.

Claims (5)

A method of processing a connection error between first and second DLNA-enabled devices,
In order to determine whether a service provided from the second DLNA-enabled device by the first DLNA-enabled device is normally provided after establishing a network connection between the first and second DLNA-enabled devices, The supporting device transmits a TCP socket connection request to the IP address and port number of the second DLNA-enabled device and the first DLNA-enabled device receives the TCP socket connection confirmation from the second DLNA-enabled device repeatedly ;
In order to prevent the DLNA application operating in the first DLNA-enabled device from waiting for an abnormal operation and an infinite loop when the TCP socket connection confirmation is not received for a predetermined period of time in the repeating step, And terminating the connection error processing method. The method according to claim 1,
The first DLNA-enabled device is a DLNA-enabled media player device,
Wherein the second DLNA-enabled device is a DLNA-enabled media server device. 3. The method of claim 2,
The first DLNA-compliant device is an AV system for a DLNA-compliant vehicle,
Wherein the second DLNA-enabled device is a DLNA-enabled smartphone. A method for media streaming service in a vehicle AV system,
Establishing a network connection with the DLNA server device;
Receiving content from the DLNA server device;
Reproducing the received content;
Transmitting a TCP socket connection request to an IP address and a port number of the DLNA server device;
Checking whether a TCP socket connection ACK is received from the DLNA server device; And
And terminating the DLNA player application when it is determined that the TCP socket connection ACK is not received in the checking step. A method for media streaming service in a vehicle AV system,
Establishing a network connection with the DLNA server device;
Receiving content from the DLNA server device;
Reproducing the received content;
Transmitting, by the vehicle AV system, a TCP socket connection request to an IP address and a port number of the DLNA server device, in order to determine whether the vehicle AV system is normally provided with content from the DLNA server device;
Confirming whether the vehicle AV system receives a TCP socket connection ACK from the DLNA server device; And
In order to prevent the DLNA player application operating in the vehicle AV system from waiting for an abnormal operation and an infinite loop, the TCP socket connection ACK received in the checking step includes an error including a connection failure, a no response, and a connection refuse And terminating the DLNA player application if applicable.

Images