JP2010186316A - Service use device, digital camera, service providing device, and communication system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a service providing device which can be operated in a lower power consumption state than when requesting end of use of a service when a service use device requests end of service use to the service providing device. <P>SOLUTION: A UPnP control point 150 transmits an event registration message of UPnP to a UPnP medium server device 330. After transmitting the event registration message, the UPnP control point 150 uses the service provided by the UPnP medium server device 330. The UPnP control point 150, when determining to end the service in use, transmits an event registration release message of UPnP to the UPnP medium server device 330. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a service use apparatus and a digital camera that operate as a UPnP control point for using a service provided by a UPnP device. The present invention also relates to a service providing apparatus that operates as a UPnP device that provides a service to a service using apparatus. Furthermore, the present invention relates to a communication system having a service using device and a service providing device.

  In order to reduce power consumption and heat generation, extend device life, improve battery duration, etc., it is common for devices in various fields, such as PC-related devices, home appliances, and portable devices, to be equipped with power-saving states. It ’s becoming a reality. There are various means for realizing power saving when executing the power saving state, depending on the type of apparatus, the specifications of the apparatus, and the like. For example, in a device having a display screen such as a TV or a mobile phone, a part of the power saving state can be realized by reducing the luminance of the display screen. Also, in the optical disk recorder, for example, the power supply to the laser used for reading / writing is turned off, the pickup is moved to the non-data area of the disk, and the rotation of the disk is decelerated or stopped to reduce a part of the power saving state. Can be realized.

  By the way, in recent years, in a small-scale LAN such as a home, a device that provides services to other devices, such as a case where a video stored in a PC or NAS is received via a LAN and viewed on a TV, An increasing number of devices control and use provided services. Regarding the provision of services and the use of services in such a LAN, UPnP (for example, see Non-Patent Document 1) is mainly used as a technique for connecting apparatuses to each other. Yes.

UPnP Device Architecture 1.0. [Online]. UPnP Forum, 2008-04-24. [Retrieved on 2009-0116]. Retrieved from the Internet: <URL: http://www.upnp.org/specs/arch/UPnP- arch-DeviceArchitecture-v1.0-20080424.pdf>

  It is possible to mount a power saving state on both a service providing apparatus that provides services by UPnP and a service using apparatus that uses services. However, a service providing apparatus, particularly a service providing apparatus having a mechanical drive unit, has a problem that it is difficult to shift to a power saving state in consideration of user convenience.

  Taking an optical disk recorder as an example, as described above, in the power saving state, the optical disk recorder stops supplying power to the laser, moves the pickup to a non-data area, and decelerates / stops disk rotation. To return from this power saving state to the normal state, the disk rotation speed is accelerated to a steady state, and the power supply to the laser is started to adjust how much power is suitable for reading and writing to the disk. It is necessary to determine the type of the disk and move the pickup to a desired data area of the disk.

  Although there are differences depending on the type and performance of the optical disk recorder, it usually takes several seconds to several tens of seconds to complete the restoration process. Considering that the video stored in the optical disc recorder in the LAN is viewed on the TV, when the optical disc recorder is in a power saving state, the user operating the TV will start watching after actually trying to start viewing. It will be a long time to wait and the convenience will be reduced. Therefore, there is a problem that the optical disk recorder cannot easily shift to the power saving state as long as there is a possibility of being used from another device. Although the optical disk recorder has been described here as an example, the same problem occurs in other apparatuses because it takes more or less time to recover from the power saving state.

  In conventional UPnP, there is no mechanism for the UPnP control point, which is a service using device, to explicitly indicate the end of service use for the UPnP device, which is a service providing device, and thus this problem cannot be solved. In other words, once the UPnP device starts providing the service to the UPnP control point, it is not possible to clearly indicate the end of service use on UPnP. Therefore, the UPnP device may shift to the power saving state unless the communication connection state is canceled due to communication disconnection. It was difficult.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a service use device and a digital camera that can request the service providing device to end use of the service.

  In addition, the present invention provides a service providing apparatus capable of operating in a state where the power consumption is lower than that before the service use termination is requested when a service use termination is requested from the service utilization apparatus. With the goal.

  Furthermore, according to the present invention, when the service using apparatus requests the service providing apparatus to end the use of the service, the service providing apparatus can operate in a state of lower power consumption than before the service providing apparatus is requested to end the use of the service. An object is to provide a communication system.

  The present invention has been made to solve the above-described problem, and is a service utilization apparatus that operates as a UPnP control point for using a service provided by a service provision apparatus that operates as a UPnP device, the service provision apparatus A first message transmitting unit that transmits to the service providing apparatus a service use message indicating that the service provided by the apparatus is used; and a service provided from the service providing apparatus is used after transmitting the service use message. And a second message transmission unit that transmits a service end message indicating that the service being used is to be terminated after the service utilization unit has started use of the service to the service providing device. It is a service using device.

  In the service utilization apparatus of the present invention, the first message transmission unit transmits a UPnP event registration message or a UPnP action message as the service utilization message.

  The service utilization apparatus of the present invention further includes a determination unit that determines whether or not to end the use of the service that is being used, and the second message transmission unit is in use by the determination unit. When it is determined that the use of the service is terminated, the service termination message is transmitted to the service providing apparatus.

  The service utilization apparatus of the present invention operates at the first power consumption level in the service utilization apparatus or a power consumption level lower than the first power consumption level and at the second power consumption level in the service utilization apparatus. And a determination unit that terminates the service being used when the power consumption level of the operation unit changes from the first power consumption level to the second power consumption level. It is characterized by doing.

  In addition, the service using apparatus of the present invention provides a first time from when a UPnP action message is transmitted to the service providing apparatus until a next action message is transmitted, or a UPnP action response message from the service providing apparatus. And a detector that detects whether or not a second time period from when the second action message is transmitted to when the next action message is transmitted has passed a predetermined period, Alternatively, when it is detected that the second period has passed, the service being used is determined to be terminated.

  In addition, the service using apparatus of the present invention further includes an input unit that receives an input from a user, and the determination unit determines to end the service in use based on an input of a service end instruction to the input unit. It is characterized by doing.

  In the service utilization apparatus of the present invention, the wireless communication performed with the service providing apparatus is wireless communication performed directly on a one-to-one basis without using a terminal that relays wireless communication.

  Moreover, this invention is a digital camera which has said service utilization apparatus.

  The present invention also provides a service providing apparatus that operates as a UPnP device that provides a service to a service using apparatus that operates as a UPnP control point, the service indicating that a service is used from the service using apparatus A message receiving unit that receives a usage message and a service termination message indicating termination of the service being used; a first determination unit that determines whether the service usage message has been received from the service usage device; A service providing unit that provides a service to the service using device that is a transmission source of the service using message when the first determining unit determines that the service using message has been received from the service using device; The service use message is sent from the use device. A second determination unit that determines whether or not the service end message has been received from the service using apparatus after receiving the message, and a first power consumption level in the service providing apparatus, or the first power consumption level It is determined that the service usage message is received from the service usage device by the operation unit operating at the second power consumption level at the lower power consumption level and the first determination unit. If the operation unit is operated at the first power consumption level and the second determination unit determines that the service end message has been received from the service utilization device, the second power consumption level is determined. And a control unit that operates the operating unit.

  In the service providing apparatus of the present invention, the message receiving unit receives a UPnP event registration message or a UPnP action message as the service use message.

  The service providing apparatus of the present invention transmits a response to the service end message to the service using apparatus when the second determining unit determines that the service end message has been received from the service using apparatus. The control unit may further include a response transmission unit, and the control unit may operate the operation unit at the second power consumption level after a response is transmitted by the response transmission unit.

  In the service providing apparatus of the present invention, the response transmitting unit is determined by the second determining unit that the service end message has been received from the service using apparatus, and a service is provided to the service using apparatus. When it is possible to terminate the service, the response is transmitted to the service using device.

  In addition, the present invention is a communication system having a service using apparatus that operates as a UPnP control point, and a service providing apparatus that operates as a UPnP device that provides a service to the service using apparatus. An apparatus includes: a first message transmission unit that transmits a service use message indicating that the service provided by the service providing apparatus is used to the service providing apparatus; and the service providing apparatus after transmitting the service use message. A service using unit that uses the provided service, and a service end message that indicates that the service being used is to be ended after the use of the service is started by the service using unit. A message transmission unit, and the service The providing device includes a message receiving unit that receives the service use message and the service end message from the service using device, and a first determining unit that determines whether the service using message is received from the service using device. A service providing unit that provides a service to the service using device that is a transmission source of the service using message when the first determining unit determines that the service using message is received from the service using device; A second determination unit for determining whether the service end message has been received from the service using apparatus after receiving the service use message from the service using apparatus; and a first power consumption level in the service providing apparatus, or A power consumption level lower than the first power consumption level When the operation unit operating at the second power consumption level in the service providing apparatus and the first determination unit determine that the service use message is received from the service use apparatus, the first unit When the second determination unit determines that the service end message has been received from the service using device, the operation unit is operated at the second power consumption level. And a control unit to be operated.

  Also, in the communication system of the present invention, the first message transmission unit transmits a UPnP event registration message or a UPnP action message as the service use message.

  The service using apparatus and the digital camera of the present invention transmit a service end message to the service providing apparatus when transmitting the service use message to the service providing apparatus and starting the use of the service, and then ending the service being used. Therefore, according to the service using apparatus and the digital camera of the present invention, it is possible to request the service providing apparatus to end the use of the service.

  The service providing apparatus of the present invention receives the service use message from the service using apparatus and operates at the first power consumption level, and then receives the service end message from the service using apparatus. Operate at a lower second power consumption level. Therefore, according to the service providing apparatus of the present invention, when the service use apparatus requests the end of use of the service, the apparatus can operate in a state of lower power consumption than before the service use end is requested.

  The communication system of the present invention includes a service utilization device and a service provision device that perform the above-described operations. Therefore, according to the communication system of the present invention, when the service using apparatus requests the service providing apparatus to terminate the use of the service, the power providing apparatus is in a state of lower power consumption than before the service providing apparatus is requested to terminate the use of the service. Can work.

It is a block diagram which shows the structure of the digital still camera and optical disk recorder by one Embodiment of this invention. It is a rear view of the digital still camera by one Embodiment of this invention. It is a functional block diagram which shows the function of UPnP which the digital still camera and optical disk recorder by one Embodiment of this invention have. It is a flowchart which shows the procedure of operation | movement of the digital still camera by one Embodiment of this invention. It is a flowchart which shows the procedure of operation | movement of the digital still camera by one Embodiment of this invention. FIG. 6 is a reference diagram for explaining a UPnP device selection method according to an embodiment of the present invention. It is a reference diagram for explaining a method for selecting a service in an embodiment of the present invention. It is a flowchart which shows the procedure of operation | movement of the optical disk recorder by one Embodiment of this invention. It is a flowchart which shows the procedure of operation | movement of the optical disk recorder by one Embodiment of this invention. It is a flowchart which shows the procedure of operation | movement of the optical disk recorder by one Embodiment of this invention. It is a reference figure which shows the content of the provision destination terminal list in one Embodiment of this invention. It is a sequence diagram which shows the procedure of the communication performed between the digital still camera and optical disk recorder by one Embodiment of this invention. It is a reference figure which shows the example of the content of the message in one Embodiment of this invention. It is a reference figure which shows the example of the content of the message in one Embodiment of this invention. It is a reference figure which shows the example of the content of the message in one Embodiment of this invention. It is a reference figure which shows the example of the content of the message in one Embodiment of this invention. It is a reference figure which shows the example of the content of the message in one Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the present embodiment, a digital still camera will be described as an example of a service using apparatus having a UPnP control point function. Not limited to this, a device that can be connected to a network and has a UPnP control point function, such as a PC, a mobile phone, a PDA, an optical disk / HDD recorder, a TV, a game machine, a video camera, etc. It is possible to use.

  On the other hand, in the present embodiment, as an example of a service providing apparatus, an optical disk recorder having a UPnP device that provides a service related to a content server will be described. However, the present invention is not limited to this, and a UPnP device that can be connected to a network and can have a UPnP device, such as a PC, NAS, mobile phone, or digital camera, can be used as a service providing apparatus.

  FIG. 1 shows the configuration of a digital still camera (hereinafter abbreviated as DSC) and an optical disk recorder according to an embodiment of the present invention. The DSC 10 operates as a service using device having a UPnP control point function. The optical disc recorder 30 is connected to the DSC 10 via the network 20 and operates as a service providing apparatus having a UPnP device. FIG. 2 shows the back surface of the DSC 10.

  As shown in FIG. 1, the DSC 10 includes a CPU 101, an input interface unit 102, a ROM 103, a RAM 104, a display unit 105, an external I / F (external interface) 106, a file management unit 107, a recording unit 108, a compression / decompression engine 109, and an imaging. The unit 110 is provided.

  The CPU 101 performs various controls using the RAM 104 as a work area according to a control program stored in the ROM 103. The CPU 101 is connected to the network 20 via the external I / F 106 by a wired or wireless network protocol, and can communicate with the external optical disc recorder 30. Data transmitted / received during communication with the external optical disc recorder 30 is stored in the RAM 104.

  The input interface unit 102 is an operation input unit such as a switch, a button, a key, or a dial for a user to input an operation to the DSC 10. The input interface unit 102 may be a touch panel or the like superimposed on the display unit 105. The display unit 105 can display images, operation menus, and the like. The file management unit 107 manages files recorded in the recording unit 108 in accordance with instructions from the CPU 101.

  The recording unit 108 is a non-volatile recording medium such as a semiconductor memory, a magnetic memory, a magnetic disk, an optical disk, a magneto-optical disk, or the like, or a non-volatile recording medium capable of recording information. It may be a combination of recording media. Furthermore, the recording unit 108 does not have to be composed of only a single recording medium, and the recording unit 108 may be composed of a plurality of recording media.

  The compression / decompression engine 109 compresses and decompresses images. The imaging unit 110 captures a subject image and generates imaging data.

  In the DSC 10 having such a configuration, at the time of shooting, the CPU 101 captures imaging data from the imaging unit 110 according to an instruction input to the input interface unit 102. Further, as shown in FIG. 2, the CPU 101 displays an image based on the imaging data on the display unit 105 and stores the imaging data in the RAM 104. When the CPU 101 instructs the compression / decompression engine 109 to compress, the compression / decompression engine 109 compresses the image data stored in the RAM 104 into an image in a format designated by the CPU 101. The compressed image is recorded in the recording unit 108 through the file management unit 107 in accordance with an instruction from the CPU 101.

  When the image recorded in the recording unit 108 is reproduced in this way, first, the image in the recording unit 108 is read through the file management unit 107 in accordance with an instruction from the CPU 101, and the compression / decompression engine 109 follows the recorded format. The image is stretched. The expanded image is displayed on the display unit 105. In addition, the user can set the DSC 10 using the input interface 102 in a state where the setting screen for performing settings related to the DSC 10 and the image at the time of imaging or reproduction is displayed on the display unit 105.

  On the other hand, the optical disc recorder 30 includes a CPU 301, a ROM 302, a RAM 303, an external I / F 305, a file management unit 306, a recording unit 307, an input interface unit 308, a display unit 309, and a broadcast wave receiving unit 310.

  The CPU 301 performs various controls using the RAM 303 as a work area according to a control program stored in the ROM 302. The CPU 301 is connected to the network 20 via the external I / F 305 by a wired or wireless network protocol, and can communicate with the external DSC 10. Data transmitted and received during communication with the external DSC 10 is stored in the RAM 303.

  The file management unit 306 manages files recorded in the recording unit 307 in accordance with instructions from the CPU 301. The recording unit 307 is a recording medium and will be described on the premise of an optical disc. However, the same description as that regarding the recording unit 108 described above is also applied to the recording unit 307.

  When an image is transmitted to the external DSC 10 via the external I / F 305, the image in the recording unit 307 is read through the file management unit 306 and transmitted via the external I / F 305 according to an instruction from the CPU 301. .

  The input interface unit 308 is an operation input unit for a user to perform an operation input to the optical disc recorder 30, and the same description as that regarding the input interface unit 102 described above is also applied to the input interface unit 308. The display unit 309 can display an operation menu, the state of the optical disc recorder 30, and the like.

  The broadcast wave receiving unit 310 receives a broadcast wave transmitted from a broadcast facility (not shown), and records the received content in the recording unit 307 through the file management unit 306 as necessary according to the determination of the CPU 301.

  Communication between the DSC 10 and the optical disc recorder 30 may be performed in an infrastructure mode via a relay terminal such as an access point, or may be performed in an ad hoc mode in which communication is performed directly with each other without using a relay terminal.

  Next, UPnP functions of the DSC 10 and the optical disc recorder 30 will be described. As shown in FIG. 3, the DSC 10 has a UPnP control point 150 corresponding to the message transmission unit, service usage unit, determination unit, and detection unit included in the service usage apparatus of the present invention. The service utilization apparatus according to the present invention further includes an operation unit and an input unit. The operation unit corresponds to the CPU 101, the display unit 105, the recording unit 108, and the like, and the input unit corresponds to the input interface unit 102. .

  The optical disk recorder 30 includes a UPnP media server device 330 corresponding to a message receiving unit, a determination unit, a service providing unit, a control unit, and a response transmission unit included in the service providing apparatus of the present invention. The operation unit included in the service providing apparatus of the present invention corresponds to the CPU 301, the recording unit 307, and the like. Each function of the UPnP control point 150 and the UPnP media server device 330 is realized by software processing executed by the CPU 101 or the CPU 301 according to the control program.

  The UPnP media server device 330 further includes a ContentDirectory service 331 and a ConnectionManager service 332. The ContentDirectory service 331 provides a service for managing content on a directory. The connection manager service 332 provides a service related to connection for communicating content.

  The UPnP control point 150 controls the UPnP media server device 330 to control the content directory service 331 and / or the connection manager service 332 to reproduce the content recorded in the recording unit 307 of the optical disc recorder 30 on the DSC 10. be able to.

  Next, the operation of the DSC 10 will be described. FIG. 4 shows an operation procedure of the DSC 10. Steps S103 to S118 are conventional UPnP control point processing steps. When the DSC 10 is powered on, the UPnP control point 150 determines whether or not it is already connected to the network (step S101). If not connected to the network, the UPnP control point 150 establishes a connection to the network (step S102). The UPnP control point 150 maintains the connection to the network established in step S102. Thereafter, the process proceeds to step S103.

  On the other hand, if it is already connected to the network, the UPnP control point 150 transmits M-SEARCH for discovering UPnP devices on the network (step S103). Subsequently, the UPnP control point 150 determines whether a response to the M-SEARCH (M-SEARCH Response) has been received (step S104). If no response has been received, the UPnP control point 150 determines whether a network participation notification (ssdp: alive) has been received from the UPnP device (step S105). If the network participation notification has not been received, the process returns to step S104.

  On the other hand, when a response to M-SEARCH or a network participation notification is received, the UPnP control point 150 receives information on the UPnP device (manufacturer information, A Device Description acquisition request (device information request, HTTP GET) for acquiring Device Description (device information) including the basic information of the service that the UPnP device has) is transmitted (step S106). Subsequently, the UPnP control point 150 determines whether or not a Device Description has been received (step S107). If the device description has not been received, the process returns to step S107, and the determination is performed again.

  On the other hand, when the Device Description is received, the UPnP control point 150 receives a Service Description acquisition request (Service Information) for acquiring Service Description (service information) including service information related to the specific control contents of the service provided by the UPnP device. A service information request, HTTP GET) is transmitted (step S108). This Service Description acquisition request is transmitted for each service. Subsequently, the UPnP control point 150 determines whether or not a Service Description has been received (step S109). If the Service Description has not been received, the process returns to Step S109 and the determination is performed again.

  On the other hand, when receiving the Service Description, the UPnP control point 150 stores the service information included in the Service Description in the RAM 104 (Step S110). Subsequently, the UPnP control point 150 determines whether or not the Service Description has been received from all the services that are the transmission destinations of the Service Description acquisition request (Step S111). If there is a service that has not received the Service Description, the process returns to Step S109 in order to wait for reception of the Service Description.

  On the other hand, when the Service Description has been received from all the services, the UPnP control point 150 determines whether or not the Device Description has been received from all the UPnP devices to which the Device Description acquisition request has been transmitted (Step S112). If there is a UPnP device that has not received the device description, the process returns to step S107 in order to wait for the device description to be received.

  On the other hand, when the Device Description is received from all UPnP devices, the UPnP control point 150 selects a UPnP device to be controlled (step S113). At this time, as shown in FIG. 6, a list of available UPnP devices is displayed on the display unit 105 of the DSC 10, and the user can select a desired UPnP device. When UPnP device information to be used is input to the input interface unit 102, the UPnP control point 150 selects a UPnP device to be controlled based on the input information.

  After selecting the UPnP device to be controlled, the UPnP control point 150 is used to register an event notification for a service that the user wants to send an event notification due to a state change in each service in the UPnP device to be controlled. A Subscribe (event registration message) is transmitted (step S114). After step S114, the UPnP control point 150 maintains communication with the UPnP device to be controlled. Subsequently, the UPnP control point 150 determines whether or not Notify for notifying the occurrence of an event in the service has been received (step S115). If Notify is received, the process proceeds to step S119.

  On the other hand, if Notify has not been received, the UPnP control point 150 determines whether or not to issue an action for performing some control on the UPnP device in accordance with an instruction from the user or the like (step S116). If it is not necessary to issue an action, the process proceeds to step S119.

  On the other hand, when it is necessary to issue an action, the UPnP control point 150 transmits an action (action message) to the UPnP device to be controlled (step S117). After step S117, the UPnP control point 150 maintains communication with the UPnP device to be controlled. Subsequently, the UPnP control point 150 determines whether or not a response (action response message) to the Action has been received (step S118). If no response has been received, the process returns to step S118, and the determination is performed again.

  On the other hand, when the response is received, the UPnP control point 150 determines whether or not to end the use of the service provided by the UPnP device to be controlled (step S119). Whether or not to end the use of the service is determined based on, for example, the presence / absence of an explicit instruction to end the use of the service by the user, the power consumption level of the DSC 10, and the time related to transmission or reception of a predetermined message.

  When the user explicitly inputs an instruction to end service use, a list of currently used services is displayed on the display unit 105 of the DSC 10 as shown in FIG. 7, and the user can select a desired service. It becomes possible. When information on a service whose use is to be terminated is input to the input interface unit 102, the UPnP control point 150 selects a service to be terminated based on the input information. In this case, the UPnP control point 150 determines to end the use of the service that the user has instructed to end using.

  In addition, when the DSC 10 shifts from the operation state with the normal power (first power consumption level) to the power saving state (second power consumption level), the UPnP control point 150 makes all the currently used It is determined that use of the service is terminated. Furthermore, even when a predetermined time has elapsed since the previous action was transmitted or the next action was transmitted after the previous action response was received, the UPnP control point 150 also determines the action. It is determined that the use of the service related to is terminated. If it is not necessary to end the use of the service provided by the UPnP device to be controlled, the process returns to step S115.

  On the other hand, when the use of the service provided by the UPnP device to be controlled is terminated, the UPnP control point 150 is registered for each service for which the subscription has been transmitted in step S114. An Unsubscribe (event registration cancellation message) for notifying the cancellation of the current event is transmitted (step S120). The use of the service is canceled by canceling event registration in the UPnP device that has received Unbuscribe.

  Subsequently, the UPnP control point 150 transmits a service use termination request Action (X_FinishServiceRequest) to each service that has not transmitted a subscription in step S114 among the services to be terminated (step S121). .

  Subsequently, the UPnP control point 150 determines whether or not a service end preparation completion Notify (X_FinishServiceReady) for notifying the completion of preparation for service end is received in response to the service use end request Action (step S122). If the service end preparation completion notification is received, the process proceeds to step S126.

  On the other hand, if the service end preparation completion notification Notify has not been received, the UPnP control point 150 determines whether or not a service use end response, which is a response to the service use end request Action transmitted in step S121, has been received (step S121). S123). If the service use end response has not been received, the process returns to step S122. On the other hand, when the service use end response is received, the UPnP control point 150 determines whether or not the service use end response is a normal response (step S124). If the service use end response is a normal response, the process proceeds to step S126.

  On the other hand, if the service use end response is not a normal response, the UPnP control point 150 determines whether or not the service use end response is a predetermined error response (step S125). If the service use end response is not an error response, the process returns to step S119. On the other hand, if the service use end response is an error response, the process returns to step S122.

  As will be described later, if the UPnP device that has received the service use end request Action has already been able to end providing the service to the source UPnP control point upon receiving the service use end request Action, Then, a normal response is transmitted to the DSC 10 as a service use end response. In addition, if it is not possible to end the service provision to the source UPnP control point upon receiving the service use end request Action, the UPnP device sends an error response to the DSC 10 as a service use end response. After that, when it becomes possible to end the provision of the service, the service end preparation completion Notify is transmitted to the DSC 10.

  When the service end preparation completion Notify or the normal service use end response is received, the UPnP control point 150 stores in the RAM 104 that preparation for ending the transmission of the transmission source service is completed (step S126). ). Subsequently, the UPnP control point 150 determines whether or not preparation for ending service provision has been completed for all of the destination services of the service use end request Action (step S127). If there is a service that is not ready to end the provision of the service, the process returns to step S122.

  On the other hand, when preparation for ending service provision is completed for all of the destination services of the service use end request Action, the UPnP control point 150 determines whether other services are continuously used ( Step S128). When other services are continuously used, the process returns to step S115. On the other hand, if no other service is used, the process returns to step S103. Thereafter, the same processing as described above is executed.

  Next, the operation of the optical disc recorder 30 will be described. 8 to 10 show the operation procedure of the optical disk recorder 30. FIG. Steps S205 to S213, S218, and S220 are processing steps of the conventional UPnP device. Hereinafter, the UPnP media server device 330 included in the optical disc recorder 30 is simply referred to as a UPnP device. When the optical disc recorder 30 is powered on, the optical disc recorder 30 starts operating in the normal power operating state (first power consumption level) (step S201). Here, the optical disk recorder 30 starts operating in the operating state with the normal power, but the operation may be started in the power saving state (second power consumption level).

  Subsequently, the UPnP device in the optical disc recorder 30 initializes the provision destination terminal list 40 for managing to which service using apparatus the service is provided (step S202). FIG. 11 shows an example of the provision destination terminal list 40. The provided terminal list 40 includes information (“terminal name” in FIG. 11) for identifying a service using device that is a service providing destination, and information (“status” in FIG. 11) indicating the service usage status of the service using device. ) Is stored in the RAM 104 in association with each other.

  Subsequently, the UPnP device determines whether it is already connected to the network (step S203). If it is already connected to the network, the process proceeds to step S205. On the other hand, if not connected to the network, the UPnP device establishes a connection to the network (step S204). The UPnP device maintains the connection to the network established in step S204. Thereafter, the process proceeds to step S205.

  When the process proceeds to step S205, the UPnP device in the optical disc recorder 30 and the service in the UPnP device transmit a network participation notification (ssdp: alive) to the UPnP control point (step S205). Subsequently, the UPnP device determines whether or not M-SEARCH has been received from the UPnP control point (step S206). If M-SEARCH has not been received, the process proceeds to step S208. On the other hand, when receiving the M-SEARCH, the UPnP device transmits a response to the M-SEARCH to the UPnP control point (step S207). Subsequently, the process proceeds to step S208.

  When the process proceeds to step S208, the UPnP device determines whether or not a device description acquisition request (device information request) has been received from the UPnP control point (step S208). If the device description acquisition request has not been received, the process proceeds to step S210. On the other hand, when receiving the Device Description acquisition request, the UPnP device transmits the Device Description as a response to the UPnP control point (step S209). Subsequently, the process proceeds to step S210.

  When the process proceeds to step S210, the service in the UPnP device determines whether a service description acquisition request (service information request) is received from the UPnP control point (step S210). If the service description acquisition request has not been received, the process proceeds to step S212. On the other hand, when the service description acquisition request is received, the service in the UPnP device transmits the service description to the UPnP control point as a response (step S211). Subsequently, the process proceeds to step S212.

  When the process proceeds to step S212, the service in the UPnP device determines whether a subscription (event registration message) has been received from the UPnP control point (step S212). If the subscriber has not been received, the process proceeds to step S218.

  On the other hand, when receiving the subscribe, the service in the UPnP device transmits a response to the subscribe to the UPnP control point (step S213). After receiving the subscribe, the service in the UPnP device maintains communication with the UPnP control point. Subsequently, the service in the UPnP device determines whether or not an SID (Service ID) is given to the Subscribe (step S214). A Subscribe to which no SID is assigned is a Subscribe for registering an initial event, and a Subscribe to which an SID is assigned is a Subscribe for updating the status of a registered event. If an SID is assigned to the subscribe, the process proceeds to step S218.

  On the other hand, when the SID is not assigned to the Subscribe, the service in the UPnP device adds the Subscriber transmission source terminal to the providing destination terminal list 40 as using the status (Step S215). Subsequently, the optical disc recorder 30 operates in an operating state (first power consumption level) with normal power (step S216). When the optical disc recorder 30 is operating in the power saving state (second power consumption level), the optical disc recorder 30 shifts to the operating state with normal power. However, when the optical disc recorder 30 is already operating in an operating state with normal power, the operating state of the optical disc recorder 30 does not change. Further, the service in the UPnP device transmits an initial event for notifying the initial state to the UPnP control point (step S217). Subsequently, the process proceeds to step S218.

  When the process proceeds to step S218, the service in the UPnP device determines whether or not an unsubscribe (event registration cancellation message) is received from the UPnP control point (step S218). If an unsubscribe has not been received, the process proceeds to step 221. On the other hand, when the Unsubscribe is received, the service in the UPnP device deletes the information related to the Unsubscribe transmission source terminal from the provision destination terminal list 40 (Step S219). Subsequently, the service in the UPnP device transmits a response to Unsubscribe to the UPnP control point (step S220). Subsequently, the process proceeds to step S221.

  When the process proceeds to step S221, the service in the UPnP device determines whether there is a state change in the service (step S221). If there is no state change in the service, the process proceeds to step S223. On the other hand, when there is a status change in the service, the service in the UPnP device transmits Notify for notifying the status change to the UPnP control point (step S222). Subsequently, the process proceeds to step S223.

  When the process proceeds to step S223, the service in the UPnP device determines whether there is a terminal whose status is waiting to be completed among the terminals described in the provision destination terminal list 40 ( Step S223). If there is no terminal whose status is waiting to end, the process proceeds to step S227. On the other hand, when there is a terminal whose status is waiting for termination, the service in the UPnP device determines whether or not it is possible to terminate the provision of the service to the terminal that is waiting for termination ( Step S224). When the optical disk recorder 30 is writing to a disk, etc., provision of the service being executed cannot be terminated. If the service provision to the terminal whose status is waiting to be terminated cannot be terminated, the process proceeds to step S227.

  On the other hand, if it is possible to end the provision of the service to the terminal whose status is waiting for termination, the service in the UPnP device transmits a service termination preparation completion Notify to the UPnP control point (step S225). . After sending the service end preparation completion Notify, the service in the UPnP device deletes information related to the unsubscribe source terminal from the provision destination terminal list 40 (step S226). Subsequently, the process proceeds to step S227.

  When the process proceeds to step S227, the service in the UPnP device determines whether an action (action message) is received from the UPnP control point (step S227). If no action has been received, the process proceeds to step S238. On the other hand, when the action is received, the service in the UPnP device determines whether or not the terminal that is the source of the action exists among the terminals described in the provision destination terminal list 40 (step S228). Since the reception of the Action, the service in the UPnP device maintains communication with the UPnP control point. If there is a terminal that is the source of the Action, the process proceeds to step S231.

  On the other hand, when there is no terminal that is the source of the Action, the service in the UPnP device adds the terminal that is the source of the Action as being in use to the providing destination terminal list 40 (step S229). Subsequently, the optical disc recorder 30 operates in an operating state (first power consumption level) with normal power (step S230). Subsequently, the process proceeds to step S231.

  When the process proceeds to step S231, the service in the UPnP device determines whether or not the received action is a service use end request action (step S231). If the received action is not the service use end request action, the service in the UPnP device transmits a response to the action to the UPnP control point (step S232). Subsequently, the process proceeds to step S238.

  On the other hand, if the received Action is a service use end request Action, the service in the UPnP device determines whether or not its service can be provided (step S233). As described above, in the case where the optical disk recorder 30 is writing to a disk or the like, provision of the service being executed cannot be terminated.

  If the service is in a state in which the service can be ended, the service in the UPnP device transmits a normal response as a service use end response to the UPnP control point (step S234). Furthermore, the service in the UPnP device deletes information related to the transmission destination terminal of the service use end response from the provision destination terminal list 40 (step S235). Subsequently, the process proceeds to step S238.

  On the other hand, if the service itself is not in a state where the provision can be terminated, the service in the UPnP device transmits a predetermined error response as a service use termination response to the UPnP control point (step S236). After the error response is transmitted, the service in the UPnP device changes the status of the transmission destination terminal of the service use end response among the terminals described in the provision destination terminal list 40 to wait for termination (step S237). Subsequently, the process proceeds to step S238.

  When the process proceeds to step S238, the service in the UPnP device determines whether or not any terminal information is described in the provision destination terminal list 40 (step S238). If any terminal information is described in the provision destination terminal list 40, the process returns to step S206.

  On the other hand, when no information of any terminal is described in the provision destination terminal list 40, the optical disc recorder 30 operates in the power saving state (second power consumption level). Subsequently, the process returns to step S206.

  Next, an example of communication performed between the DSC 10 and the optical disc recorder 30 will be described. FIG. 12 shows this communication procedure. The optical disk recorder 30 starts to operate in an operation state with normal power (the power consumption level is the first level), and the UPnP media server device 330 in the optical disk recorder 30 and the service in the UPnP media server device 330 (ContentDirectory service 331). , ConnectionManager service 332) multicasts a network participation notification (ssdp: alive) on the network (corresponding to step S205).

  On the other hand, when the UPnP control point 150 in the DSC 10 joins the network, it multicasts M-SEARCH over the network (corresponding to step S103). Upon receiving the M-SEARCH, the UPnP media server device 330 transmits an M-SEARCH response to the UPnP control point 150 (corresponding to steps S206 and S207).

  Upon receiving the M-SEARCH response, the UPnP control point 150 transmits a device description acquisition request (HTTP GET) to the UPnP media server device 330 based on the information described in the M-SEARCH response (step GET). Corresponding to S104 and S106).

  Upon receiving the Device Description acquisition request, the UPnP media server device 330 transmits the Device Description regarding the UPnP device to the UPnP control point 150 (corresponding to steps S208 and S209).

  When the UPnP control point 150 receives the Device Description from the UPnP media server device 330, the UPnP control point 150 obtains the Service Directory request 331 and the ConnectionManager service 332 from the Content Directory service 331 based on the information described in the Device Description. Transmit (corresponding to steps S107 and S108).

  Upon receiving the Service Description acquisition request, the Content Directory service 331 and the Connection Manager service 332 transmit the Service Description related to each service to the UPnP control point 150 (corresponding to Steps S210 and S211).

  When the UPnP control point 150 receives the Service Description from the ContentDirectory service 331 and the ConnectionManager service 332, the UPnP control point 150 stores the information described in each Service Description (corresponding to Steps S109 and S110).

  As described above, the UPnP control point 150 receives the Device Description from the UPnP media server device 330 and receives the Service Description from the ContentDirectory service 331 and the ConnectionManager service 332. Confirmation of reception corresponds to steps S111 and S112.

  When the UPnP media server device 330 is selected as the UPnP device to be controlled, the UPnP control point 150 transmits a Subscribe to the ContentDirectory service 331 that is a service in the UPnP media server device 330 (in steps S113 and S114). Correspondence). In the example illustrated in FIG. 12, the Subscribe is not transmitted to the ConnectionManager service 332 on the assumption that it is not necessary to receive an event from the ConnectionManager service 332.

  Thereafter, an Action, an Action response, and an event (Notify) are transmitted and received between the UPnP control point 150 and the ContentDirectory service 331 and the ConnectionManager service 332 (Steps S115 to S118, S217, S221 to S222, S227, S231 to S232). Corresponding). As a result, the UPnP control point 150 can use the content directory service 331 and the connection manager service 332.

  When the user wants to end the use of the UPnP media server device 330 (corresponding to step S119), it is as follows. The UPnP control point 150 transmits a Subscribe to the ContentDirectory service 331, which is a service in the UPnP media server device 330 that is currently controlled, because it transmits a Subscribe (corresponding to Step S120). Further, since the UPnP control point 150 does not transmit a subscription to the connection manager service 332, it transmits a service use end request action (corresponding to step S121).

  The ConnectionManager service 332 that has received the service use termination request Action (corresponding to step S231) determines whether or not the service provision can be terminated (corresponding to step S233). For example, it is assumed that the connection manager service 332 cannot complete the service provision. In that case, the ConnectionManager service 332 transmits a response to the service use end request Action as a predetermined error response (corresponding to steps S236 and S237).

  Thereafter, the connection manager service 332 transmits a service end preparation completion Notify when the service can be ended (corresponding to step S225). At this time, since there is no terminal in the provision destination terminal list 40 of the UPnP media server device 330, the optical disc recorder 30 operates in the power saving state (second power consumption level) (corresponding to steps S238 and S239). .

  Next, content examples of various messages transmitted and received between the UPnP control point, the UPnP device, and the service in the UPnP device will be described. FIG. 13 shows an example of the contents of Service Description. In the part indicated by reference numeral 1300, the definition of the service use end request Action is described. In addition, in the part indicated by reference numeral 1310, the definition of service end preparation completion Notify is described.

  FIG. 14 shows an example of the content of the service use end request Action. In the portion indicated by reference numeral 1400, contents indicating a service use end request Action are described. FIG. 15 shows an example of the content of a response (in case of normal response) of the service use end request Action. In the portion indicated by reference numeral 1500, contents indicating a normal response to the service use end request Action are described.

  FIG. 16 shows an example of the content of a response (in the case of an error response) of the service use end request Action. In the portion indicated by reference numeral 1600, contents indicating an error response of the service use end request Action are described. FIG. 17 shows an example of the contents of the service end preparation completion Notify. In the portion indicated by reference numeral 1700, the content indicating that the service termination preparation is completed is described.

  Next, an example of the contents of the provision destination terminal list 40 will be described. When the service providing apparatus receives a subscription or some kind of action from the service using apparatus having the terminal name AAA, as shown in FIG. 11, in the provided terminal list 40, information indicating that the terminal name is AAA and the status is being used. Is added. Further, similarly, when the service providing apparatus receives a subscription or some kind of action from the service using apparatus having the terminal name BBB, information indicating that the terminal name is BBB and the status is being used is added to the provision destination terminal list 40. The

  Subsequently, when the service providing apparatus receives the service use end request Action from the service using apparatus having the terminal name AAA and the service providing apparatus cannot complete the service provision, the status of the terminal name AAA is used. Changed from waiting to finish. When the provision of this service can be terminated, information whose terminal name is AAA and whose status is waiting for termination is deleted.

  As described above, according to the present embodiment, a service using device that operates as a UPnP control point transmits a service use message (Subscribe (event registration message) or Action (action message)) to the service providing device and performs service. When the service being used is terminated after the use of the service is started, a service termination message (Unsubscribe (event registration cancellation message) or service utilization termination request Action) is transmitted to the service providing apparatus. In addition, the service providing apparatus operating as a UPnP device receives a subscription from the service using apparatus, operates in a normal power operating state (first power consumption level), and then receives a service end message from the service using apparatus. The power consumption state (second power consumption level). Therefore, the service providing apparatus can shift to the power saving state when the service using apparatus is requested to end the use of the service.

  Furthermore, according to the present embodiment, the service using device maintains communication with the service providing device at least after sending a Subscribe or an Action to the service providing device and sending an Unsubscribe or a service use end request Action. Also, the service providing apparatus maintains communication with the service using apparatus at least after receiving the Subscribe or Action from the service using apparatus and receiving the Subscribe or the service use end request Action to shift to the power saving state. . Therefore, the service providing apparatus can shift to the power saving state without disconnecting communication with the service using apparatus.

  As described above, the embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to the above-described embodiments, and includes design changes and the like without departing from the gist of the present invention. .

  DESCRIPTION OF SYMBOLS 10 ... DSC, 20 ... Network, 30 ... Optical disk recorder, 101, 301 ... CPU, 102, 308 ... Input interface part, 103, 302 ... ROM, 104, 303 ... RAM, 105, 309 ... display unit, 106, 305 ... external I / F, 107, 306 ... file management unit, 108, 307 ... recording unit, 109 ... compression / decompression engine, DESCRIPTION OF SYMBOLS 110 ... Imaging part, 150 ... UPnP control point, 310 ... Broadcast wave receiving part, 330 ... UPnP media server device, 331 ... ContentDirectory service, 332 ... ConnectionManager service

Claims (14)

A service using apparatus that operates as a UPnP control point for using a service provided by a service providing apparatus that operates as a UPnP device,
A first message transmission unit that transmits a service use message indicating use of a service provided by the service providing apparatus to the service providing apparatus;
After transmitting the service use message, a service using unit that uses a service provided from the service providing device;
A second message transmission unit that transmits a service end message indicating that the service being used is to be terminated after the service utilization unit starts to use the service;
A service using device.   The service use apparatus according to claim 1, wherein the first message transmission unit transmits an UPnP event registration message or a UPnP action message as the service use message. A determination unit for determining whether to end the use of the service in use;
The said 2nd message transmission part transmits the said service end message to the said service provision apparatus, when it is judged by the said judgment part that the utilization of the said service in use is complete | finished. The service utilization apparatus as described. An operation unit that operates at a first power consumption level in the service utilization device or a power consumption level lower than the first power consumption level and operates at the second power consumption level in the service utilization device;
The determination unit, when the power consumption level of the operation unit is changed from the first power consumption level to the second power consumption level, determines to end the service being used. 4. The service using device according to 3. A first time from when a UPnP action message is transmitted to the service providing apparatus until a next action message is transmitted, or a next action message after receiving a UPnP action response message from the service providing apparatus. A detection unit for detecting whether or not the second time until transmission has passed a predetermined period;
The said judgment part judges that the said service in use is complete | finished when it is detected that the said 1st time or the said 2nd time passed the said period. Service utilization device. It further has an input unit for receiving input from the user,
The service using apparatus according to claim 3, wherein the determination unit determines to end the service being used based on an input of a service end instruction to the input unit.   The service utilization apparatus according to claim 1, wherein the wireless communication performed with the service providing apparatus is wireless communication performed directly on a one-to-one basis without using a terminal that relays wireless communication.   A digital camera comprising the service utilization device according to claim 1. A service providing apparatus that operates as a UPnP device that provides a service to a service using apparatus that operates as a UPnP control point,
A message receiving unit for receiving a service use message indicating use of a service and a service end message indicating end of the service being used from the service use device;
A first determination unit for determining whether or not the service use message has been received from the service use device;
A service providing unit that provides a service to the service using device that is a transmission source of the service using message when the first determining unit determines that the service using message is received from the service using device;
A second determination unit for determining whether or not the service end message is received from the service using apparatus after receiving the service use message from the service using apparatus;
An operation unit operating at a first power consumption level in the service providing apparatus or a power consumption level lower than the first power consumption level and operating at the second power consumption level in the service providing apparatus;
When the first determination unit determines that the service use message has been received from the service use device, the operation unit is operated at the first power consumption level, and the second determination unit A controller that operates the operating unit at the second power consumption level when it is determined that the service end message has been received from a service using device;
A service providing apparatus.   10. The service providing apparatus according to claim 9, wherein the message receiving unit receives a UPnP event registration message or a UPnP action message as the service use message. When the second determination unit determines that the service end message has been received from the service using device, the second determining unit further includes a response transmitting unit that transmits a response to the service end message to the service using device,
The service providing apparatus according to claim 9, wherein the control unit operates the operation unit at the second power consumption level after a response is transmitted by the response transmission unit.   The response transmitter is determined by the second determination unit that the service end message has been received from the service using device, and when the service providing to the service using device can be ended, The service providing apparatus according to claim 11, wherein the response is transmitted to the service using apparatus. A communication system having a service using apparatus that operates as a UPnP control point and a service providing apparatus that operates as a UPnP device that provides a service to the service using apparatus,
The service using device is:
A first message transmission unit that transmits a service use message indicating use of a service provided by the service providing apparatus to the service providing apparatus;
After transmitting the service use message, a service using unit that uses a service provided from the service providing device;
A second message transmission unit that transmits a service end message indicating that the service being used is to be terminated after the service utilization unit starts to use the service;
Have
The service providing apparatus includes:
A message receiving unit for receiving the service use message and the service end message from the service use device;
A first determination unit for determining whether or not the service use message has been received from the service use device;
A service providing unit that provides a service to the service using device that is a transmission source of the service using message when the first determining unit determines that the service using message is received from the service using device;
A second determination unit for determining whether or not the service end message is received from the service using apparatus after receiving the service use message from the service using apparatus;
An operation unit operating at a first power consumption level in the service providing apparatus or a power consumption level lower than the first power consumption level and operating at the second power consumption level in the service providing apparatus;
When it is determined by the first determination unit that the service use message has been received from the service use device, the operation unit is operated at the first power consumption level, and the second determination unit A controller that operates the operating unit at the second power consumption level when it is determined that the service end message has been received from a service using device;
A communication system.   14. The communication system according to claim 13, wherein the first message transmission unit transmits a UPnP event registration message or a UPnP action message as the service use message.

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