JP5191878B2 - Content transfer method and system for transmitting content from terminal in home network to wide area network - Google Patents

Description

  The present invention relates to a content transfer method and system for transmitting content from a terminal in a home network to a wide area network.

  Home network systems in which a plurality of home appliances are connected to a local area network (LAN) have become widespread in ordinary homes. By interconnecting different home appliances, remote control and operation status monitoring from other devices can be realized.

  There is the DLNA (Digital Living Network Alliance) as an industry standardization organization that prescribes protocols used in home networks. The DLNA-compliant protocol realizes a home network in a multi-vendor environment and realizes interoperability between different home appliances. Accordingly, digital content stored in one home appliance can be used from the other home appliance.

  According to the DLNA protocol stack, Ethernet (registered trademark) or wireless LAN (IEEE802.11) is applied as a physical layer in a home network, and TCP / IP (Transmission Control Protocol / Internet Protocol) is applied as a network layer. The As the transport layer, HTTP (HyperText Transfer Protocol) is applied to the content transmission function, SOAP (Simple Object Access Protocol) is applied to the content selection function, and SSDP is used for the address setting / device discovery function. (Simple Service Discovery Protocol) is applied.

  FIG. 1 is a basic sequence diagram of DLNA in the prior art.

  According to FIG. 1, a content providing terminal 2 as a DMS (Digital Media Server) (or M-DMS (Mobile-DMS)) corresponding to DLNA and a DMP (Digital Media Player) (or M- A content reproduction terminal 3 as DMP (Mobile-DMP) is connected. The viewer can operate the content reproduction terminal 3, and desired content is stored in the content providing terminal 2.

(S11) The content reproduction terminal 3 transmits a discovery request DISCOVERY (SSDP) to the content providing terminal 2. In response to this, the content providing terminal 2 returns a discovery response Response (SSDP) to the content reproduction terminal 3.

(S12) The content playback terminal 3 transmits a search request BROWSE (HTTP) to the content providing terminal 2 in accordance with the operation of the viewer. In response to this, the content providing terminal 2 returns the content list to the content reproduction terminal 3. The content list is displayed on the content reproduction terminal 3, and the content is selected by the viewer.

(S13) Thereafter, the content reproduction terminal 3 transmits a content acquisition request (HTTP GET) to the content providing terminal 2 in accordance with the operation of the viewer. On the other hand, the content providing terminal 2 transmits the content to the content reproduction terminal 3. Thus, the viewer can view desired content.

  As described above, DLNA realizes interoperability between different home appliances in a home network. On the other hand, there is a technique in which a content reproduction device in a home network receives content from an external server outside the home network via a home gateway (see, for example, Patent Document 1). There is also a technology for connecting a device connected in the home network and a device connected outside the home network through a home gateway using a telephone and a service processing device in the home network (for example, Patent Documents). 2).

JP 2007-272868 A JP 2008-085667 A

  According to the above-described conventional technology, the content reproduction terminal has a control function for receiving content from the content providing terminal. This control function is, for example, a DMC (Digital Media Controller) (or M-DMC (Mobile-DMC)) as a content control terminal in DLNA. According to DLNA, it is assumed that the content control terminal is also connected to the home network. The content control terminal transmits a control message to the content reproduction terminal so as to receive the designated content from the content providing terminal.

  Here, a specific operation mode is assumed. For example, it is assumed that media data such as photographs and moving images is stored in a content providing terminal such as an HDD (HardDisk) recorder connected to a home network. Assume that the owner of the media data has a content control terminal and goes out. Further, it is assumed that other viewers related to the owner have a content reproduction terminal that supports the home network protocol. Assume that the owner of the media data wants other viewers to view the media data stored in the content providing terminal.

  In such a case, the content control terminal cannot control the content playback terminal because it is not connected to the home network. That is, when the content control terminal is connected to the wide area network, the content reproduction terminal cannot be controlled.

  Therefore, even when the content control terminal and the content playback terminal are connected to the wide area network, the present invention is connected to the wide area network from the content providing terminal connected to the home network by the control of the content control terminal. It is an object of the present invention to provide a content transfer method and system capable of transmitting content to a content playback terminal.

According to the present invention, a content providing terminal that supports a DLNA (Digital Living Network Alliance) compliant protocol and functions as a DMS (Digital Media Server) or M-DMS (Mobile-DMS), and a DMC (Digital Media Controller) Or a content control terminal that functions as an M-DMC (Mobile-DMC) and a content playback terminal that functions as a DMP (Digital Media Player) or M-DMP (Mobile-DMP)
A content transfer method in a system in which a content providing terminal is connected to a home gateway via a home network, and the home gateway, the content control terminal, and the content reproduction terminal are connected via a wide area network,
A first step in which the content control terminal transmits a first call connection request with the home gateway as a connection destination to the content reproduction terminal;
A second step in which the content control terminal transmits a second call connection request with the content reproduction terminal as a connection destination to the home gateway;
The content playback terminal functions as an HTTP (HyperText Transfer Protocol) client to the content providing terminal, and sends a control message based on the DLNA-compliant protocol to the content providing terminal via the home gateway through the established session. And a third step of receiving and receiving the content from the content providing terminal via the home gateway.

  According to another embodiment of the content transfer method of the present invention, the call connection request is a SIP (Simple Initiation Protocol) INVITE message, which is a third party control protocol (specified by the home gateway or content playback terminal as a connection destination). It is also preferable to be based on 3PCC (3rd Party Call Control).

According to another embodiment of the content transfer method of the present invention, in the first stage of the first step,
A step in which the content control terminal transmits a call connection request with the content control terminal as a connection destination to the home gateway;
It is preferable that the content control terminal further includes a step of transmitting and receiving a control message to and from the content providing terminal via the home gateway through the established session to discover and search the content.

  According to another embodiment of the content transfer method of the present invention, when the content playback terminal is a content playback dedicated terminal, for the third step, the content control terminal sends a playback introduction message specifying the content to be played back. It is also preferable to further include a step of transmitting to the content reproduction terminal.

  According to another embodiment of the content transfer method of the present invention, the content playback dedicated terminal preferably functions as a DLNA-compatible DMR (Digital Media Renderer) or M-DMR (Mobile-DMR).

According to the present invention, a content providing terminal that functions as a DMS or M-DMS, a content control terminal that functions as a DMC or M-DMC, and a content that functions as a DMP or M-DMP are compatible with the DLNA-compliant protocol. A playback terminal,
Content providing terminal is connected to the home gateway via the home network, and the home gateway, and a content control terminal and the content playback terminal, a connected content transfer system via a wide area network,
The content control terminal transmits a first call connection request for transmitting a first call connection request with the home gateway as a connection destination to the content reproduction terminal, and a second call connection request with the content reproduction terminal as a connection destination. Second call connection means for transmitting to the home gateway;
When the content reproduction terminal receives the first call connection request, the content reproduction terminal establishes a session with the home gateway and establishes a session with the content providing terminal via the home gateway through the established session. And a media playback control means for transmitting and receiving a control message based on the DLNA-compliant protocol and receiving the content from the content providing terminal via the home gateway,
When the home gateway receives the second call connection request, the call connection establishment means for establishing a session with the content reproduction terminal, and between the content reproduction terminal and the content providing terminal via the session, And a data transfer means for transferring the control message and the content.

  According to another embodiment of the content transfer system of the present invention, the call connection request is a SIP INVITE message based on a third party control protocol (3PCC) designated as a connection destination by the home gateway or the content reproduction terminal. It is also preferable.

  According to another embodiment of the content transfer system of the present invention, the content control terminal is established with a third call connection means for transmitting a call connection request with the content control terminal as a connection destination to the home gateway. It is also preferable to further include media control means for transmitting / receiving control messages to / from the content providing terminal via the home gateway through the session, and for finding and searching for the content.

  According to another embodiment of the content transfer system of the present invention, when the content playback terminal is a content playback dedicated terminal, the content control terminal transmits a playback introduction message specifying the content to be played back to the content playback terminal. It is also preferable to further include a reproduction introduction message transmitting means.

  According to another embodiment of the content transfer system of the present invention, it is preferable that the content reproduction dedicated terminal functions as a DLNA compatible DMR (Digital Media Renderer) or M-DMR (Mobile-DMR).

  According to the content transfer method and system of the present invention, even when the content control terminal and the content playback terminal are connected to the wide area network, the content providing terminal connected to the home network is controlled by the content control terminal. The content can be transmitted to a content reproduction terminal connected to the wide area network.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.

  FIG. 2 is a first sequence diagram in the present invention.

  According to FIG. 2, the content providing terminal 2 compatible with the home network protocol is connected to the home network 5. A home gateway 4 is connected between the home network 5 and the Internet (wide area network) 6. Further, a home network protocol compatible content control terminal 1 and a content reproduction terminal 3 are connected to the Internet 6.

  The home network protocol is, for example, a DLNA compliant protocol. The content providing terminal 2 functions as a DLNA-compatible DMS or M-DMS, and is a hard disk recorder, for example. The content control terminal 1 functions as a DLNA-compatible DMC or M-DMC, and is a mobile phone, for example. Furthermore, the content reproduction terminal functions as DLNA-compatible DMP or M-DMP, and is, for example, a digital television.

  In the case of FIG. 2, specifically, a user uses a mobile phone (DMC) outside the home to store content stored in a hard disk recorder (DMR) at home, for example, a digital possessed by another person such as a friend. This is a case of reproduction on a television (DMP).

(S201) First, the content control terminal 1 transmits a call connection request with the content control terminal as a connection destination to the home gateway 4. The call connection request is, for example, a SIP INVITE message. In response to the INVITE message, a session is established by exchanging 200OK and ACK.

(S202) The content control terminal 1 transmits a discovery request DISCOVERY (HTTP) to the home gateway 4 through the established session. The home gateway 4 transmits the discovery request DISCOVERY (SSDP) to the content providing terminal 2. The content providing terminal 2 that has received the discovery request DISCOVERY (SSDP) returns a discovery response Response (SSDP) to the home gateway 4. The home gateway 4 transmits the discovery response Response (HTTP) to the content control terminal.

(S203) In addition, the content control terminal 1 transmits a search request BROWSE (HTTP) to the home gateway 4, and the home gateway 4 transmits the search request BROWSE (SSDP) to the content providing terminal 2. On the other hand, the content providing terminal 2 transmits a content list (SSDP) to the home gateway 4, and the home gateway 4 transmits the content list (HTTP) to the content control terminal 1. The next step S204 may be executed without executing step S203. This is because the content providing terminal 2 has already been discovered by the content control terminal.

(S204) Next, the content control terminal 1 transmits a first call connection request with the home gateway 4 as a connection destination to the content reproduction terminal 3. The first call connection request is also a SIP INVITE message. However, unlike the call connection request in S201, the first call connection request is based on a third party control protocol (3PCC) designated as a connection destination by the home gateway or the content reproduction terminal. Also, the SDP description document is not described in the INVITE message of the first call connection request (no S DP).

  The content playback terminal 3 that has received this INVITE message (no SDP) returns 200 OK including Offer, which is an SDP description document, to the content control terminal 1. In response to this, the content control terminal 1 returns an ACK to the content reproduction terminal 3.

(S205) Further, the content control terminal 1 transmits to the home gateway 4 a second call connection request with the content reproduction terminal 3 as a connection destination. The content control terminal 1 includes Offer received from the content reproduction terminal 3 in the INVITE message of the second call connection request. The home gateway 4 that has received this INVITE message returns 200 OK including Answer, which is an SDP description document, to the content control terminal 1. In response to this, the content control terminal 1 returns an ACK to the content reproduction terminal 3.

(S206) Thereafter, the content control terminal 1 transmits an ACK including the answer received from the home gateway 4 to the content reproduction terminal 3.

(S207) Thereby, the call connection is controlled by the content control terminal 1, but the session is established between the content reproduction terminal 3 and the home gateway 4 using the SDP description document. Further, the content reproduction terminal 3 functions as an HTTP client with respect to the content providing terminal 2.

(S208) The content reproduction terminal 3 can transmit and receive a control message based on the home network protocol to and from the content providing terminal 2 via the home gateway 4 through the established session. First, the content reproduction terminal 3 transmits a search request BROWSE (HTTP) to the content providing terminal 2 via the home gateway 4. In response to this, the content providing terminal 2 returns a content list (HTTP) to the content reproduction terminal 3 via the home gateway 4.

(S209) The content reproduction terminal 3 displays the content list to the content viewer and selects any content. For the selected content, the content reproduction terminal 3 transmits a content acquisition request (HTTP GET) to the content providing terminal 2 via the home gateway 4. In response to this, the content providing terminal 2 transmits the designated content to the content reproduction terminal 3 via the home gateway 4. The content reproduction terminal 3 can receive and reproduce the content.

  FIG. 3 is a second sequence diagram in the present invention.

  FIG. 3 differs from FIG. 3 only in that the content playback terminal 3 is a content playback dedicated terminal. The content reproduction dedicated terminal is, for example, a DLNA compatible DMR or M-DMR. Unlike DMP, DMR does not have DMC functions. Therefore, the content reproduction dedicated terminal cannot directly control the content stored in the content providing terminal 2 as in S208 of FIG.

S301 to S306 in FIG. 3 are exactly the same as S201 to S206 in FIG.
(S307) The content control terminal 1 transmits a reproduction introduction message designating the content selected by the content introducer to the content reproduction terminal 3. Accordingly, the content reproduction terminal 3 can transmit a content acquisition request (HTTP GET) to the content providing terminal 2 without transmitting the search request BROWSE to the content providing terminal 2.

  FIG. 4 is a third sequence diagram in the present invention.

  According to FIG. 4, the content control terminal 1, the content providing terminal 2 and the content reproduction terminal 3 are connected to the home network 5. Specifically, this is a case where a user uses a mobile phone (DMC) at home to reproduce content stored in a hard disk recorder (DMR) at home on a digital television (DMP) at home.

(S41) First, the content control terminal 1 discovers the content providing terminal 2 and the content reproduction terminal 3 by broadcasting a discovery request DICOVERY (SSDP).
(S42) Next, the content control terminal 1 transmits a search request BROWSE (HTTP) to the content providing terminal 2, and the content providing terminal 2 returns a content list to the content control terminal 1.
(S43) Here, the content control terminal 1 has already found the content reproduction terminal 3 in S41. For this reason, it is recognized that there is no need to make a call connection.
(S44) The content control terminal 1 transmits a reproduction introduction message designating the content selected by the content introducer to the content reproduction terminal 3.
(S45) The content reproduction terminal 3 transmits a content acquisition request (HTTP GET) to the content providing terminal 2 without transmitting the search request BROWSE to the content providing terminal 2. In response to this, the content providing terminal 2 transmits the designated content to the content reproduction terminal 3. The content reproduction terminal 3 can receive and reproduce the content.

  FIG. 5 is a functional configuration diagram of each device in the system of the present invention.

  According to FIG. 5, the content control terminal 1 includes a first call connection unit 11, a second call connection unit 12, a third call connection unit 13, a media control unit 14, and a reproduction introduction message transmission unit. 15. These functional components are realized by executing a program that causes a computer installed in the content control terminal to function.

  The third call connection unit 13 establishes a session with the home gateway 4. This corresponds to S201 in FIG. The fact that the session has been established is output to the media control unit 14.

  The media control unit 14 finds the content providing terminal 2 via the home gateway 4 and acquires the content list. This corresponds to S202 and S203 in FIG. Specify the home gateway to which the content selected by the content introducer is connected. The home gateway address is output to the first call connection unit 11.

  The first call connection unit 11 transmits a first call connection request with the home gateway 4 as a connection destination to the content reproduction terminal 3. This corresponds to S204 in FIG. When determining that the content control terminal 1 and the content reproduction terminal 3 are connected to the home network 5, the first call connection unit 11 does not transmit the first call connection request.

  The second call connection unit 12 transmits a second call connection request with the content reproduction terminal 3 as a connection destination to the home gateway 4. This corresponds to S205 in FIG.

  The reproduction introduction message transmission unit 15 transmits a reproduction introduction message including the address of the content selected by the content introducer to the content reproduction terminal 3. This corresponds to S307 in FIG. The content reproduction terminal 3 can know the address of the content selected by the content introducer.

  Further, according to FIG. 5, the content reproduction terminal 3 includes a call connection establishment unit 31 and a media reproduction unit 32.

  The call connection establishment unit 31 establishes a session with the home gateway 4 when receiving the first call connection request.

  The media playback unit 32 transmits / receives a control message based on the home network protocol to / from the content providing terminal 2 via the home gateway 4 through the established session, and transmits the control message from the content providing terminal 2 via the home gateway 4. Receive content.

  Further, according to FIG. 5, the home gateway 4 includes a call connection establishment unit 41 and a data transfer unit 42.

  The call connection establishment unit 41 establishes a session with the content reproduction terminal 3 when receiving the second call connection request.

  The data transfer unit 42 transfers the control message and the content between the content reproduction terminal 3 and the content providing terminal 2 via the session.

  As described above in detail, according to the content transfer method and system of the present invention, even when the content control terminal and the content reproduction terminal are connected to a wide area network, the home is controlled by the control of the content control terminal. The content can be transmitted from the content providing terminal connected to the network to the content reproduction terminal connected to the wide area network.

  In the various embodiments of the present invention described above, various changes, modifications, and omissions in the scope of the technical idea and the viewpoint of the present invention can be easily made by those skilled in the art. The above description is merely an example, and is not intended to be restrictive. The invention is limited only as defined in the following claims and the equivalents thereto.

It is a basic sequence diagram of DLNA in the prior art. It is a 1st sequence diagram in this invention. It is a 2nd sequence diagram in this invention. It is a 3rd sequence diagram in the present invention. It is a functional block diagram of each apparatus in the system of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Content control terminal 11 1st call connection part 12 2nd call connection part 13 3rd call connection part 14 Media control part 15 Playback introduction message transmission part 2 Content provision terminal 3 Content reproduction terminal 31 Call connection establishment part 32 Media Playback unit 4 Home gateway 41 Call connection establishment unit 42 Data transfer unit 5 Home network 6 Internet, wide area network

Claims (10)

A content providing terminal that supports a DLNA (Digital Living Network Alliance) compliant protocol and functions as a DMS (Digital Media Server) or M-DMS (Mobile-DMS), and a DMC (Digital Media Controller) or M-DMC (Mobile -DMC) and a content playback terminal functioning as DMP (Digital Media Player) or M-DMP (Mobile-DMP),
The content providing terminal is connected to the home gateway via the home network, and the home gateway, and the contents control terminal and the content playback terminal in the content transfer method in a system connected to via a wide area network There,
A first step in which the content control terminal transmits a first call connection request with the home gateway as a connection destination to the content reproduction terminal;
A second step in which the content control terminal transmits a second call connection request with the content reproduction terminal as a connection destination to the home gateway;
The content playback terminal functions as an HTTP (HyperText Transfer Protocol) client to the content providing terminal, and also establishes the DLNA-compliant protocol with the content providing terminal through the home gateway through an established session. And a third step of receiving the content from the content providing terminal via the home gateway.   The call connection request is a SIP (Simple Initiation Protocol) INVITE message and is based on a 3rd party control protocol (3PCC) specified as a connection destination by the home gateway or the content reproduction terminal. The content transfer method according to claim 1. Before the first step,
The content control terminal sending a call connection request with the content control terminal as a connection destination to the home gateway;
The content control terminal further includes a step of transmitting and receiving the control message to and from the content providing terminal via the home gateway through the established session, and finding and searching for the content. The content transfer method according to claim 1 or 2 . When the content playback terminal is a content playback dedicated terminal,
The About 3 step, the contents control terminal, a playback introduction message specifying the content to be reproduced, any one of claims 1 to 3, further comprising the step of transmitting to the content reproduction terminal The content transfer method described in 1. 5. The content transfer method according to claim 4 , wherein the content reproduction dedicated terminal functions as a DLNA compatible DMR (Digital Media Renderer) or M-DMR (Mobile-DMR). A DLNA-compliant protocol that includes a content providing terminal that functions as DMS or M-DMS, a content control terminal that functions as DMC or M-DMC, and a content playback terminal that functions as DMP or M-DMP And
The content providing terminal via a home network is connected to the home gateway, and the home gateway, and a pre-Kiko content control terminal and the content playback terminal, the connected content transfer system via a wide area network There,
The content control terminal transmits a first call connection request to the content playback terminal for a first call connection request to the home gateway, and a second call to the content playback terminal as a connection destination Second call connection means for transmitting a connection request to the home gateway;
When the content reproduction terminal receives the first call connection request, the content reproduction terminal establishes a session with the home gateway, and provides the content through the home gateway through the established session. Media playback control means for transmitting / receiving a control message based on the DLNA-compliant protocol to / from a terminal and receiving the content from the content providing terminal via the home gateway;
The home gateway, when receiving a second call connection request, a call connection establishment means for establishing a session with the content reproduction terminal, the content reproduction terminal via the session, and the content providing terminal And a data transfer means for transferring the control message and the content. The call connection request is a SIP of the INVITE message, according to claim 6, characterized in that is based on a third-party control protocol (3PCC) where the home gateway or the content reproduction terminal designated as the destination Content transfer system. The content control terminal is connected to the content providing terminal via the home gateway through a third call connection means for transmitting a call connection request to the home gateway to the home gateway through a call connection request to the content control terminal. The content transfer system according to claim 6 , further comprising: media control means for transmitting and receiving the control message to and from the media to discover and search the content. When the content playback terminal is a content playback dedicated terminal,
The contents control terminal, wherein the regeneration introduction message specifying the content to be reproduced, in any one of claims 6 to 8, further comprising a playback introduction message transmitting means for transmitting to said contents reproduction terminal Content transfer system. 10. The content transfer system according to claim 9 , wherein the content reproduction dedicated terminal functions as a DLNA-compliant DMR (Digital Media Renderer) or M-DMR (Mobile-DMR).

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