Method and apparatus for reducing power consumption in digital living network alliance network

A method and apparatus for reducing power consumption in a DLNA (Digital Living Network Alliance) network is provided. A method for operating a digital media renderer to reduce power consumption in a DLNA network includes receiving media content from a digital media server, and controlling the power of a communication connection device and a display according to the control state of the received media content.

PRIORITY

This application claims the benefit under 35 U.S.C. §119(a) of a Korean patent application filed in the Korean Intellectual Property Office on Dec. 4, 2009 and assigned Serial No. 10-2009-0119669, the entire disclosure of which is hereby incorporated by reference.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to Digital Living Network Alliance (DLNA). More particularly, the present invention relates to a method and apparatus for reducing power consumption in a DLNA network.

2. Description of the Related Art

Various devices are used in homes, such as information devices (e.g., Personal Computers (PCs)), communication devices (e.g., telephones), broadcasting devices (e.g., TVs), and Audio/Video (AV) devices (e.g., Digital Video Disks (DVDs) and digital cameras). Home automation has been proposed and used to automatically control such devices.

In the early stages of development, home automation systems controlled home appliances separately by telephones or infrared rays. Home automation systems did not support a connection between the home appliances. However, recent development of communication technology provides a method of constructing a network between home appliances and integrating/managing the home appliances by a controller. This system is referred to as a home network system.

The home network system connects various network home appliances (e.g., TVs, washing machines, microwave ovens, gas ranges, audios, air conditioners, and boilers), lighting, gas valves, and front doors to controllers (e.g., home gateways and home servers), and controls the connected appliances through a specific terminal (e.g., a remote controller).

Recently, standardization of home network systems is in progress. The Digital Living Network Alliance (DLNA) standard has been proposed for controlling information home appliances (e.g., TVs, Video Tape Recorders (VTRs), digital cameras, and audio systems). The DLNA standard focuses on sharing all the content provided from information home appliances. For example, the use of the DLNA standard allows home devices to share various digital media content stored in personal devices (e.g., mobile devices or computers), thereby enabling users to enjoy the digital media content conveniently regardless of the locations and devices in homes.

However, during the use of the DLNA service, the activation of a Wireless Local Area Network (WLAN) and a display device results in significant power consumption. A portable device (e.g., a mobile communication terminal) consumes most of its power at a display and an RF chipset, which may reduce the lifetime of the portable terminal. Accordingly, a method and apparatus for reducing power consumption in a DLNA network is desired.

SUMMARY OF THE INVENTION

An aspect of the present invention is to address at least the above-mentioned problems and/or disadvantages and to provide at least the advantages described below. Accordingly, an aspect of the present invention is to provide a method for reducing power consumption in a Digital Living Network Alliance (DLNA) network.

Another aspect of the present invention is to provide an apparatus for reducing power consumption in a DLNA network.

According to an aspect of the present invention, a method for operating a digital media renderer to reduce power consumption in a DLNA network is provided. The method includes, receiving media content from a digital media server, and controlling the power of at least one of a communication connection device and a display according to the control state of the received media content.

According to another aspect of the present invention, a method for operating a digital media server to reduce power consumption in a DLNA network is provided. The method includes, determining whether a digital media renderer or a digital media player is in a connection state, and terminating the connection if the digital media renderer or the digital media player is not in the connection state or if there is no command from the digital media renderer or the digital media player for a predetermined time.

According to another aspect of the present invention, a method for operating a digital media server to reduce power consumption in a DLNA network is provided. The method includes, determining whether at least one digital media renderer or digital media player are in a connection state, and notifying the connection state a user if at least one digital media renderer or digital media player is not in the connection state.

According to another aspect of the present invention, a method for reducing power consumption in a DLNA network is provided. The method includes, controlling the power of a display according to a control state of media content received from a digital media server, disconnecting the power of a communication connection device or converting the communication connection device to a power save mode, after completion of buffering the received media content, and interrupting the power of the communication connection device after displaying a pop-up window to a user when the communication connection device is disconnected.

According to another aspect of the present invention, a system for reducing power consumption in a DLNA network is provided. The system includes, a digital media renderer for controlling the power of a display according to a control state of media content received from a digital media server, for disconnecting the power of a communication connection device or converting the communication connection device to a power save mode after completion of buffering the received media content, and for interrupting the power of the communication connection device after displaying a pop-up window to a user when the communication connection device is disconnected, and a digital media server for determining whether the digital media renderer is in a connection state, and for terminating the connection if the digital media renderer or digital media player is not in the connection state.

According to another aspect of the present invention, a system for reducing power consumption in a Digital Living Network Alliance (DLNA) network is provided. The system includes a digital media server for storing and providing digital media content; a digital media renderer including a communication connection device for communicating with the digital media server and a display for reproducing the digital media content; a digital media controller for identifying digital media content stored in the digital media server, for requesting the digital media server to transmit the identified digital media content to the digital media renderer, wherein the digital media renderer controls the power of the display according to a control state of the digital media content received from a digital media server, disconnects the power of the communication connection device or converts the communication connection device to a power save mode after completion of buffering the received media content, and interrupts the power of the communication connection device after displaying a pop-up window to a user when the communication connection device is disconnected, and wherein the digital media server determines whether the digital media renderer is in a connection state, and terminates a connection between the digital media server and the digital media renderer if the digital media renderer is not in the connection state.

DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS

Exemplary embodiments of the present invention provide a method and apparatus for reducing power consumption in a Digital Living Network Alliance (DLNA) network.

FIG. 1is a block diagram illustrating a Digital Living Network Alliance (DLNA) network according to an exemplary embodiment of the present invention.

Referring toFIG. 1, a DLNA network may include a Digital Media Server (DMS)10, a Digital Media Controller (DMC)20, and a Digital Media Renderer (DMR)30. The DMS10, the DMC20, and the DMR30may perform wired/wireless communication (e.g., using a Wireless Local Area Network (WLAN)) between them. The DMS10stores media content (e.g., moving pictures and image files). The media content may be broadcast signals received in real time. The DMC20searches the DMS10for media content. The DMC20requests the DMR30to play the corresponding media content of the DMS10, and the DMR30requests the DMS10to provide the DMR30with the media content requested by the DMC20. Thereafter, the DMS10transmits the corresponding media content to the DMR30, and the DMR30plays the received media content.

The DLNA network may be implemented by three component entities as described above. However, the DLNA network may also be implemented by two component entities as described below with respect toFIG. 2.

FIG. 2is a block diagram illustrating a DLNA network according to an exemplary embodiment of the present invention.

Referring toFIG. 2, two component network entries are shown, a Digital Media Player (DMP)200and a DMS210. The DMP200may operate as the DMC20and the DMR30illustrated inFIG. 1, and the DMS210may be the same as the DMS10illustrated inFIG. 1. The DMP200and the DMS210perform wired/wireless communication therebetween.

FIG. 3illustrates a method for operating a DMR to reduce power consumption in a DLNA network according to an exemplary embodiment of the present invention. An operation of the DMC20for reducing power consumption in the DLNA network may be the same as an operation of the DMR30, and thus a description thereof will be omitted for conciseness.

Referring toFIG. 3, in step300, the DMR determines whether the operation state is a pause state, a play state or a stop state. For example, under the control of the DMC20, the DMR30determines whether it is playing the content received from the DMS10or pauses/stops the play of the content received from the DMS10.

If the operation state is a pause state in step300, then in the event of the continuance of the pause state for a predetermined time, the DMR dims a display, such as a Liquid Crystal Display (LCD) to minimize the power consumption in step302.

If the operation state is a play state in step300, the DMR turns on the display to operate the display in step304. The DMR continues to operate the display to display the played content.

If the operation state is a stop state in step300, the DMR turns off the display to reduce the power consumption in step306. Thereafter, the DMR proceeds to a corresponding mode. In the corresponding mode, the DMR waits for a control signal from the DMC.

In step308, the DMR determines whether a buffering operation is in progress. The DMR determines whether it is receiving/buffering the content from the DMS. If a buffering operation is in progress (i.e., the DMR is receiving/buffering the content from the DMS in step308), the DMR maintains a normal connection state of a WLAN in step316and uses the WLAN to receive/buffer the content from the DMS. If a buffering operation is not in progress (i.e., the DMR completes the reception of the content from the DMS in step308), the DMR determines whether it operates as DMP in step310.

If the DMR operates as a DMP in step310, the DMR disconnects the WLAN used to transmit the content from DMS in step314. When the DMR completes the buffering operation and operates as a DMP, the DMR powers down the WLAN to reduce the power consumption. When the DMR is to transmit a command to the DMS, the DMR reconnects the WLAN to transmit the command to the DMS.

If the DMR does not operate as a DMP (i.e., the DMR/DMC function is divided in step310), the DMR transitions the WLAN to a power save mode in step312. The reason for transitioning the WLAN to a power save mode if the DMR does not operate as a DMP is that the DMC may transmit a control signal to the DMR even when the DMR does not receive the content from the DMS. Also, it is to maintain a power save mode of the WLAN in the play state after completion of the buffering operation.

In step316, the DMR determines whether the DMR or the DMS disconnects from the WLAN (e.g., if a WLAN connection is difficult to maintain due to an increase in the distance from the DMR or the DMS). If the DMR or the DMS disconnects from the WLAN in step316, the DMR notifies the user of the WLAN state through a pop-up window if the DMR is in a play state or a pause state in step318. In step320, the DMR disconnects the WLAN to reduce the power consumption, if a predetermined time elapses without roaming.

On the other hand, if the DMR or the DMS does not disconnect from the WLAN in step316, the DMR continues to supply power to the WLAN or to maintain the power save mode.

FIG. 4illustrates a method for operating a DMS to reduce power consumption in a DLNA network according to an exemplary embodiment of the present invention.

Referring toFIG. 4, in step400, the DMS determines whether there is a user operation. If there is no user operation in step400, then in step402, regardless of the state of the DMR and DMC or DMP, the DMS turns off a display (such as an LCD) to reduce the power consumption. According to an exemplary embodiment of the present invention, if the DMS is operating, this operation state may be displayed in other ways (e.g., a periodic LED on/off, and an operation indication on a display screen).

If there is a user operation in step400, the DMS determines in step404whether the DMR or the DMP is buffering the content. The DMS determines whether it is transmitting the content to the DMR or the DMP.

If the DMR or the DMP is buffering the content, (i.e., the DMS is transmitting the content to the DMR or the DMP in step404, the DMS maintains a normal connection state of a WLAN in step408and transmits the content to the DMR or the DMP through the WLAN.

If the DMR or the DMP is not buffering the content, (i.e., the DMS has completed the transmission of the content to the DMR or the DMP in step404), the DMS transitions the WLAN to a power save mode in step406.

In step408, the DMS determines whether the DMR or the DMC or DMP disconnects from the WLAN (e.g., if a WLAN connection is difficult to maintain due to an increase in the distance from the DMR or the DMC). If the DMR or the DMC or the DMP disconnects from the WLAN in step408, the DMS notifies the user of the WLAN state through a pop-up window in step410. In step412, the DMS disconnects the WLAN to reduce the power consumption, if a predetermined time elapses without roaming.

On the other hand, if the DMR or the DMC or DMP does not disconnect from the WLAN (in step408), the DMS continues to supply power to the WLAN or to maintain the power save mode.

Meanwhile, because the DMS cannot know whether the DMR disconnects from the network, the DMS always converts to a standby mode. Accordingly, the DMS may cause power consumption.

An exemplary embodiment of the present invention provides a method for preventing the DMS from causing power consumption in the standby mode, as described below with reference toFIG. 5.

FIG. 5illustrates a method for operating a DMS to reduce power consumption in a DLNA network according to an exemplary embodiment of the present invention.

Referring toFIG. 5, in step500, the DMS determines whether at least one DMR is in connection with the DLNA network. If at least one DMR is not connected to the DLNA network in step502, the DMS notifies the user of the state through a pop-up window after a predetermined time in step504. The DMS determines the state of the DMR playing the content, and automatically terminates the connection to reduce the power consumption, if the DMR is not connected or there is no command from the DMR for a predetermined time.

If at least one DMR is connected to the DLNA network in step502the DMS transitions to a standby mode in step506.

According to an exemplary embodiment of the present invention, if the content is an image type, a slide show may be executed after downloading all the slide content, in order to reduce a buffering time and a WLAN use time. Thereafter, the WLAN is disconnected to reduce the power consumption.

FIG. 6illustrates a method for operating a DMP or the DMR to reduce power consumption in the DLNA network according to an exemplary embodiment of the present invention.

Referring toFIG. 6, in step600, the DMP or the DMR determines whether the content received from the DMS is slide content such as images. If the content received from the DMS is slide content, such as images in step600, the DMP or the DMR downloads all the slide content in step602. The DMP or the DMR does not execute a slide show until all the slide content is received.

In step604, the DMP or the DMR executes a slide show after receiving all the slide content. In step60, the DMP or the DMR disconnects the WLAN.

FIGS. 7A to 7Gillustrate a display screen for setting DLNA in a portable device according to an exemplary embodiment of the present invention. The portable device may be, for example, a DMS, a DMR, or a DMP.

FIG. 7Aillustrates a network selection screen of the portable device.FIG. 7Billustrates a content selection setting screen with a digital media server (DMS).FIG. 7Cillustrates a server selection screen of the portable device.FIG. 7Dillustrates a content (e.g., music, pictures and videos) selection screen of the portable device.FIG. 7Eillustrates a file selection screen of the portable device.FIG. 7Fillustrates a renderer (DMP or DMR) selection screen.FIG. 7Gillustrates a play screen in the renderer.

Although an LCD is illustrated herein as a display of the portable device, exemplary embodiments of the present invention are not limited thereto. Additional examples of the display include a Plasma Display Panel (PDP) and Light Emitting Diode (LED).

According to an exemplary embodiment of the present invention as described above, the state of a WLAN chip and a display is controlled according to the state of a DLNA supporting device in a DLNA network, thereby making it possible to minimize the power consumption.