Abstract:
A method and apparatus for reducing power consumption in an electronic device are provided. The method includes receiving media content from a server, establishing a control state based on the media content, controlling power of at least one of a communication connection device and a display according to the control state of the received media content, determining whether a reception of the media content is completed, determining whether the electronic device performs functions for playing and controlling a digital media, transitioning a Wireless Local Area Network (WLAN), when it has been determined that a reception of the media content and that the functions are not performed by the electronic device, to a power save mode, and disconnecting the WLAN, when it has been determined that receiving the media content is completed and that the functions are performed by the electronic device, wherein the electronic device comprises the communication connection device.

Description:
PRIORITY 
       [0001]    This application is a continuation application of U.S. patent application Ser. No. 12/954,725 filed Nov. 26, 2010 in the U.S. Patent and Trademark Office, which 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 Ser. No. 10-2009-0119669, the entire disclosure of each of which is hereby incorporated by reference. 
     
    
     BACKGROUND OF THE INVENTION 
       [0002]    1. Field of the Invention 
         [0003]    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. 
         [0004]    2. Description of the Related Art 
         [0005]    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. 
         [0006]    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. 
         [0007]    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). 
         [0008]    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. 
         [0009]    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 a Radio Frequency (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 
       [0010]    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. 
         [0011]    Another aspect of the present invention is to provide an apparatus for reducing power consumption in a DLNA network. 
         [0012]    According to an aspect of the present invention, a method for reducing power consumption in an electronic device is provided. The method includes receiving media content from a server, establishing a control state based on the received media content, controlling power of at least one of a communication connection device and a display according to the control state of the received media content, determining whether a reception of the media content is completed, determining whether the electronic device performs functions for playing and controlling a digital media, transitioning a Wireless Local Area Network (WLAN), when it has been determined that a reception of the media content and that the functions are not performed by the electronic device, to a power save mode, and disconnecting the WLAN, when it has been determined that receiving the media content is completed and that the functions are performed by the electronic device, wherein the electronic device comprises the communication connection device. 
         [0013]    According to another aspect of the present invention, a method for reducing power consumption in an electronic device is provided. The method includes determining whether there is a user operation, determining whether at least one another electronic device is in a connection state with a WLAN, notifying the user of the WLAN state when it is determined that the at least one another electronic device is not in a connection state with the WLAN, and terminating the connection if the at least one another electronic device is not in the connection state or if there is no command from the at least one another electronic device for a predetermined time, wherein the electronic device turns off a display when there is no user operation. 
         [0014]    According to yet another aspect of the present invention, a method for reducing power consumption in an electronic device is provided. The method includes determining whether at least one at least one another electronic device are in a connection state, notifying a user of the connection state of the at least one another electronic device if the at least one another electronic device is not in the connection state, transmitting digital media content, via a WLAN, to the at least one another electronic device; and transitioning the WLAN to power save mode when the digital media content transmission is complete. 
         [0015]    According to still another aspect of the present invention, a method for reducing power consumption in an electronic device is provided. The method includes controlling the power of a display according to a control state of media content received from a server, disconnecting the power of a communication connection device after a reception of the media content is completed when the communication connection device performs the functions for playing and controlling a digital media, converting the communication connection device to a power save mode after a reception of the media content is completed when the communication connection device does not perform functions for playing and controlling a digital media, and disconnecting the power of the communication connection device after displaying a pop-up window to a user, when the communication connection device is disconnected. 
         [0016]    According to yet another aspect of the present invention, a system for reducing power consumption in a DLNA network is provided. The system includes a WLAN, a first electronic device for controlling the power of a display according to a control state of media content received from a server, for disconnecting the power of a communication connection device or converting the communication connection device to a power save mode after a reception of the media content is completed, 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 from the WLAN, and a second electronic device for determining whether the first electronic device is in a connection state with the WLAN, for terminating the connection if the first electronic device is not in the connection state, for determining whether there is a user operation of the digital media renderer, and for turning off a connected display when there is no determined user operation. 
         [0017]    Other aspects, advantages, and salient features of the invention will become apparent to those skilled in the art from the following detailed description, which, taken in conjunction with the annexed drawings, discloses exemplary embodiments of the invention. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0018]    The above and other aspects, features, and advantages of certain exemplary embodiments of the present invention will be more apparent from the following description taken in conjunction with the accompanying drawings, in which: 
           [0019]      FIG. 1  is a block diagram illustrating a Digital Living Network Alliance (DLNA) network according to an exemplary embodiment of the present invention; 
           [0020]      FIG. 2  is a block diagram illustrating a DLNA network according to an exemplary embodiment of the present invention; 
           [0021]      FIG. 3  is flow diagram illustrating a method for operating a digital media renderer to reduce power consumption in a DLNA network according to an exemplary embodiment of the present invention; 
           [0022]      FIG. 4  is flow diagram illustrating a method for operating a digital media server to reduce power consumption in a DLNA network according to an exemplary embodiment of the present invention; 
           [0023]      FIG. 5  is flow diagram illustrating a method for operating a digital media server to reduce power consumption in a DLNA network according to another exemplary embodiment of the present invention; 
           [0024]      FIG. 6  is flow diagram illustrating a method for operating a digital media player or a digital media renderer to reduce power consumption in a DLNA network according to an exemplary embodiment of the present invention; and 
           [0025]      FIGS. 7A ,  7 B,  7 C,  7 D,  7 E,  7 F, and  7 G are diagrams illustrating a display screen for setting DLNA in a portable device according to an exemplary embodiment of the present invention. 
           [0026]    Throughout the drawings, like reference numerals will be understood to refer to like parts, components and structures. 
       
    
    
     DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS 
       [0027]    The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of exemplary embodiments of the invention as defined by the claims and their equivalents. It includes various specific details to assist in that understanding but these are to be regarded as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. Also, descriptions of well-known functions and constructions are omitted for clarity and conciseness. 
         [0028]    The terms and words used in the following description and claims are not limited to the bibliographical meanings, but, are merely used by the inventor to enable a clear and consistent understanding of the invention. Accordingly, it should be apparent to those skilled in the art that the following description of exemplary embodiments of the present invention is provided for illustration purpose only and not for the purpose of limiting the invention as defined by the appended claims and their equivalents. 
         [0029]    It is to be understood that the singular forms “a,” “an,” and “the” include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to “a component surface” includes reference to one or more of such surfaces. 
         [0030]    Exemplary embodiments of the present invention provide a method and apparatus for reducing power consumption in a Digital Living Network Alliance (DLNA) network. 
         [0031]      FIG. 1  is a block diagram illustrating a Digital Living Network Alliance (DLNA) network according to an exemplary embodiment of the present invention. 
         [0032]    Referring to  FIG. 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 DMS  10 , the DMC  20 , and the DMR  30  may perform wired/wireless communication (e.g., using a Wireless Local Area Network (WLAN)) between them. The DMS  10  stores media content (e.g., moving pictures and image files). The media content may be broadcast signals received in real time. The DMC  20  searches the DMS  10  for media content. The DMC  20  requests the DMR  30  to play the corresponding media content of the DMS  10 , and the DMR  30  requests the DMS  10  to provide the DMR  30  with the media content requested by the DMC  20 . Thereafter, the DMS  10  transmits the corresponding media content to the DMR  30 , and the DMR  30  plays the received media content. 
         [0033]    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 to  FIG. 2 . 
         [0034]      FIG. 2  is a block diagram illustrating a DLNA network according to an exemplary embodiment of the present invention. 
         [0035]    Referring to  FIG. 2 , two component network entries are shown, a Digital Media Player (DMP)  200  and a DMS  210 . The DMP  200  may operate as the DMC  20  and the DMR  30  illustrated in  FIG. 1 , and the DMS  210  may be the same as the DMS  10  illustrated in  FIG. 1 . The DMP  200  and the DMS  210  perform wired/wireless communication therebetween. 
         [0036]      FIG. 3  illustrates 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 DMC  20  for reducing power consumption in the DLNA network may be the same as an operation of the DMR  30 , and thus a description thereof will be omitted for conciseness. 
         [0037]    Referring to  FIG. 3 , in step  300 , 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 DMC  20 , the DMR  30  determines whether it is playing the content received from the DMS  10  or pauses/stops the play of the content received from the DMS  10 . 
         [0038]    If the operation state is a pause state in step  300 , 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 step  302 . 
         [0039]    If the operation state is a play state in step  300 , the DMR turns on the display to operate the display in step  304 . The DMR continues to operate the display to display the played content. 
         [0040]    If the operation state is a stop state in step  300 , the DMR turns off the display to reduce the power consumption in step  306 . Thereafter, the DMR proceeds to a corresponding mode. In the corresponding mode, the DMR waits for a control signal from the DMC. 
         [0041]    In step  308 , 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 step  308 ), the DMR maintains a normal connection state of a WLAN in step  316  and 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 step  308 ), the DMR determines whether it operates as DMP in step  310 . 
         [0042]    If the DMR operates as a DMP in step  310 , the DMR disconnects the WLAN used to transmit the content from DMS in step  314 . 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. 
         [0043]    If the DMR does not operate as a DMP (i.e., the DMR/DMC function is divided in step  310 ), the DMR transitions the WLAN to a power save mode in step  312 . 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. 
         [0044]    In step  316 , 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 step  316 , 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 step  318 . In step  320 , the DMR disconnects the WLAN to reduce the power consumption, if a predetermined time elapses without roaming. 
         [0045]    On the other hand, if the DMR or the DMS does not disconnect from the WLAN in step  316 , the DMR continues to supply power to the WLAN or to maintain the power save mode. 
         [0046]      FIG. 4  illustrates a method for operating a DMS to reduce power consumption in a DLNA network according to an exemplary embodiment of the present invention. 
         [0047]    Referring to  FIG. 4 , in step  400 , the DMS determines whether there is a user operation. If there is no user operation in step  400 , then in step  402 , 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). 
         [0048]    If there is a user operation in step  400 , the DMS determines in step  404  whether the DMR or the DMP is buffering the content. The DMS determines whether it is transmitting the content to the DMR or the DMP. 
         [0049]    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 step  404 , the DMS maintains a normal connection state of a WLAN in step  408  and transmits the content to the DMR or the DMP through the WLAN. 
         [0050]    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 step  404 ), the DMS transitions the WLAN to a power save mode in step  406 . 
         [0051]    In step  408 , 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 step  408 , the DMS notifies the user of the WLAN state through a pop-up window in step  410 . In step  412 , the DMS disconnects the WLAN to reduce the power consumption, if a predetermined time elapses without roaming. 
         [0052]    On the other hand, if the DMR or the DMC or DMP does not disconnect from the WLAN (in step  408 ), the DMS continues to supply power to the WLAN or to maintain the power save mode. 
         [0053]    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. 
         [0054]    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 to  FIG. 5 . 
         [0055]      FIG. 5  illustrates a method for operating a DMS to reduce power consumption in a DLNA network according to an exemplary embodiment of the present invention. 
         [0056]    Referring to  FIG. 5 , in step  500 , 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 step  502 , the DMS notifies the user of the state through a pop-up window after a predetermined time in step  504 . 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. 
         [0057]    If at least one DMR is connected to the DLNA network in step  502  the DMS transitions to a standby mode in step  506 . 
         [0058]    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. 
         [0059]      FIG. 6  illustrates 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. 
         [0060]    Referring to  FIG. 6 , in step  600 , 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 step  600 , the DMP or the DMR downloads all the slide content in step  602 . The DMP or the DMR does not execute a slide show until all the slide content is received. 
         [0061]    In step  604 , the DMP or the DMR executes a slide show after receiving all the slide content. In step  60 , the DMP or the DMR disconnects the WLAN. 
         [0062]      FIGS. 7A to 7G  illustrate 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. 
         [0063]      FIG. 7A  illustrates a network selection screen of the portable device.  FIG. 7B  illustrates a content selection setting screen with a digital media server (DMS).  FIG. 7C  illustrates a server selection screen of the portable device.  FIG. 7D  illustrates a content (e.g., music, pictures and videos) selection screen of the portable device.  FIG. 7E  illustrates a file selection screen of the portable device.  FIG. 7F  illustrates a renderer (DMP or DMR) selection screen.  FIG. 7G  illustrates a play screen in the renderer. 
         [0064]    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). 
         [0065]    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. 
         [0066]    While the invention has been shown and described with reference to certain exemplary embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.