WO2005062188A1 - ネットワーク機器 - Google Patents
ネットワーク機器 Download PDFInfo
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- WO2005062188A1 WO2005062188A1 PCT/JP2004/007777 JP2004007777W WO2005062188A1 WO 2005062188 A1 WO2005062188 A1 WO 2005062188A1 JP 2004007777 W JP2004007777 W JP 2004007777W WO 2005062188 A1 WO2005062188 A1 WO 2005062188A1
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- network
- information
- peripheral
- peripheral device
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/2803—Home automation networks
- H04L12/2805—Home Audio Video Interoperability [HAVI] networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/2803—Home automation networks
- H04L12/2807—Exchanging configuration information on appliance services in a home automation network
- H04L12/281—Exchanging configuration information on appliance services in a home automation network indicating a format for calling an appliance service function in a home automation network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/02—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/2803—Home automation networks
- H04L2012/284—Home automation networks characterised by the type of medium used
- H04L2012/2841—Wireless
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/2803—Home automation networks
- H04L2012/2847—Home automation networks characterised by the type of home appliance used
- H04L2012/2849—Audio/video appliances
Definitions
- the present invention relates to a digital device used by being connected to a network, and more particularly, to a plug-and-play compatible device that provides a function provided by its own device to another device so that the device can use it.
- a plug-and-play compatible device that provides a function provided by its own device to another device so that the device can use it.
- IEEE1394 has become widespread as a means for connecting peripheral devices to network devices installed on home networks, especially when the above-mentioned network devices are AV devices. Therefore, network devices that conform to the IEEE 1394 standard are controlled from network devices that conform to the UPnP standard, and conversely, network devices that conform to the IEEE 1394 standard conform to the UPnP standard.
- an information processing apparatus that provides a bridge for controlling a network device to be connected is known from Japanese Patent Application Laid-Open No. 2003-8610 (Patent Document).
- Patent Document Japanese Patent Application Laid-Open No. 2003-8610
- a technology relating to universal plug and play for realizing plug and play means for example, it is known as described in Universal Plug and Play Device Architecture Version 1.0 (www.upnp.org). Disclosure of the invention
- the network device of the UPnP specification according to the conventional technology described above does not have the function of dynamically reconstructing the device description of its own device, so an extended peripheral device was connected to the network device.
- information about the additional device is not added to the device description.
- the remote user Since it is not possible to know the connection of the above-mentioned extended peripheral device from the network device used by the user, it cannot be used as a result.
- the remote user may use the function of the above-mentioned embedded device without knowing it, and actually tried to use it. In that case, inconvenience will occur.
- the information processing device disclosed in the patent document only functions as a proxy, and converts UPnP standard commands into IEEE1394 standard AVZC commands, and conversely, converts AVZC commands into UPnP commands. It provides a function to convert to standard commands. Therefore, the information processing device described above does not reconstruct the device description owned by itself.
- the network device cannot dynamically reconstruct the device description owned by the network device in response to a change in the device configuration of the network device, and cannot rebuild the device description. There is a problem in that it is not possible to notify another network device of a new device description that has been completed. As a result, the network
- Network devices cause a problem that function sharing between network devices becomes incomplete.
- An object of the present invention is to reconstruct a device description according to a change in a digital device connected to a network.
- Another object of the present invention is to notify another network device of the reconstructed device description to reflect a change in the device configuration of the own digital device.
- the digital device connected to the network is compatible with plug-and-play that can provide functions to other digital devices by communicating predetermined information through the network.
- a device description describing the configuration of the digital device as predetermined information and a change in the configuration of the device are detected by detecting a change in the configuration of the digital device.
- a means is provided for notifying the updated digital device description to another digital device via a network.
- the digital device is a device compliant with the UPnP standard.
- the description reconstructing means determines whether or not it is possible to openly provide the extended peripheral device connected to the network device to other network devices, and to determine whether or not it can be provided to other network devices. It is determined whether an extended peripheral device that can be provided to the network device is connected.
- the device description is reconstructed with reference to a device information table for determining whether or not the embedded device incorporated in the network device is operating normally.
- specific information such as a depth description, which describes information on the configuration of the peripheral device in the first device to which connection of the peripheral device is permitted, is transmitted to the second device via the network.
- the device information table In the memory, and referring to this device information table,
- the device description is obtained, and the device name of the peripheral device related to the change is obtained from the device information table, Based on the obtained device name, the device description is processed by processing the relevant information to update the device description.
- the updated device description is transmitted from the first device to the network with information indicating a location where the updated device description is stored, for example, a new advertisement message describing URL.
- the change related to the peripheral device in the first device is, for example, expansion of a function by adding a new peripheral device, deletion of the peripheral device, or concealment of the peripheral device.
- these changes are detected with reference to the device information table, and the device description is updated so that the change is reflected in the device description.
- the device description can be updated by detecting the change. Further, by notifying the updated device description to another digital device, the peripheral device extended from the own digital device can be used by the other digital device.
- FIG. 1 is a block diagram showing a configuration example of a home network to which the present invention is applied.
- Fig. 2 is a diagram for explaining an example of the configuration of a device description (partial excerpt) owned by a network device (device).
- Fig. 3 is a diagram illustrating an example of the configuration of a service description (partial excerpt) owned by a network device (device).
- FIG. 4 is a block diagram showing the configuration of the network device according to the first embodiment of the present invention.
- FIG. 5 is a diagram showing a configuration example of a device information table owned by the network device according to the first embodiment of the present invention.
- FIG. 6 is a flowchart for explaining the processing operation of the reconfiguration and notification program of the network device according to the first embodiment of the present invention.
- FIG. 7 is a diagram illustrating an example of a device description included in a network device (device).
- FIG. 8 is a diagram illustrating an example of a device description reconstructed by the description reconstruction and notification program.
- FIG. 9 is a block diagram showing an in-home network configuration for explaining the positioning of network devices in the in-home network according to the first embodiment of the present invention.
- FIG. 10 is a block diagram showing a configuration of a network device according to the second embodiment of the present invention.
- FIG. 11 is a diagram showing a configuration example of the device information table 90 provided in the network device shown in FIG.
- FIG. 12 is a flowchart for explaining the description restructuring and notification program processing operations of the network device according to the second embodiment of the present invention.
- FIG. 13 is a diagram illustrating an example of a device description reconstructed by the processing described with reference to FIG.
- FIG. 14 is a block diagram showing an in-home network configuration for explaining the positioning of network devices in an in-home network according to the second embodiment of the present invention.
- FIG. 1 is a block diagram showing a configuration example of a home network to which the present invention is applied.
- network information appliances are broadly divided into devices and control points, and a network that can provide its own functions to other devices.
- Information appliances are defined as devices, and networks that control and use devices are defined as control points.
- control points there are also networked information appliances that support both devices and control points.
- a device for network information home appliances conforming to the UPnP specification is referred to as a network device (device), and a control point is referred to as a network device (CP).
- device device
- CP network device
- Fig. 1 1 is a house, 2 is a living room, 3 is a gateway device, 4 is a wired cable, 5 is a network 1, a network connection, 6, 16 is a device description, 7, 17 is a service description, 8, 9 are embedded devices A, B, 10 are peripheral device connections, 11 and 15 are network devices (devices), 12 is expansion peripheral devices, 13 and 20 are users A, B, 14 is a bedroom, 18 is an access point, and 19 is a network device (CP).
- CP network device
- a living room 1 has a living room 2 and a bedroom 14 as a living room.
- a network device (device) 11 and an extension peripheral device 12 are installed in the living room 2.
- a network device (device) 15 and an access point 18 are installed in a bedroom 14.
- the home network of the house 1 is connected to a public communication network including the Internet via the gateway device 3, and is installed in the network device (device) 11 in the living room 2 and in the bedroom 14.
- Network devices (Depais) 15 and access points 18 And a wireless network unit connected directly to the access point 18 like a network device (CP) 19 in the bedroom 14 as shown in FIG. It consists of a wireless network unit.
- the network equipment (device) 11 is composed of a network connection unit 5 for connecting to the home network, a user A 13 and a user A 13.
- Peripheral device connection unit 10 that connects extended peripheral devices 12 to enable function expansion by B20, and various physical and logical functions provided to user A13 and user B20
- Embedded device A 8 and embedded device B 9 (only two are shown as an example, but more may be provided) and network device (device) 11 1, embedded device A 8 and embedded device B
- It is composed of a device description 6 that describes the overall configuration of the device including the device 9 and a service description 7 that describes the detailed functions that the network device (device) 11 can actually execute. That.
- the network device (device) 15 is provided with only the device description 16 and the service description 17.
- Network devices (devices) 11 1 In network device (devices) 15, only one device description 6 or 16 needs to exist, or service descriptions 7 and 17 must be embedded devices. Depending on the number of functions and configurations, there may be a plurality.
- network devices (devices) 11 and network devices (devices) 15 and CPs 19 described above include hard disk recorders that store video and music content, DVD players, There are video cameras, televisions, remote controllers, and the like.
- Network connection means include wired LAN represented by Ethernet (registered trademark) and IEEE (Institute of Electrical and Electronics Engineers) 80 2. lib, IEEE 800 There are well-known lans, etc. represented by 11a and IEEE 802.11g.
- the network device (device) 11 described above is a hard disk recorder
- examples of the embedded device A 8 and the embedded device B 9 include a timer function, a broadcast reception tuner function, and a hard disk management device for storing contents.
- examples of peripheral expansion devices 12 include hard disk drive digital video cameras, There are mobile phones, etc., and there are IDE, PCI, USB, IEEE 1394, etc. as peripheral device connection means.
- the UPnP specification specifies a communication protocol and an operation sequence for a control point to discover a desired device, obtain information on the device configuration and detailed functions of the device, and perform control. ing. That is, the network device (CP) 19 is composed of the device description 6 ⁇ service description 7, the device description 16, and the service description 17. Of the network device (device) 11 and the network device (device) 15 by acquiring the information, and the user B 20 in the bedroom 14 can also live 2 via the home network. Network devices (devices) 11 can be controlled and used.
- the network device (CP) 19 performs a description acquisition process for obtaining the device description 6 and the service description 7 of the network device (device) 11. Will be described.
- the description acquisition process is the same for the network device (device) 15.
- the first method is when the network device (device) 11 triggers first.
- the network device (device) 11 includes the storage destination URL of the device description 6, Sends an advertisement message to the home network by multicast indicating that the device is a device compliant with the UPnP specification, and the network equipment (CP) 19 receives the advertisement message and This is a method in which the device description 6 is obtained by accessing the storage destination URL described in the message.
- the network device (CP) 19 is used as a trigger.
- the network device (CP) 19 multicasts a device discovery message on the home network.
- the network device (device) 11 that has transmitted the device search message and received the device search message described above returns a search response message including the URL where the device description 6 is stored, and the network device (CP) 1 9 receives the above search response message, and
- the device description 6 is obtained by accessing the URL described in the URL.
- the network device (CP) 19 can acquire the service description 7 continuously from the device description 6 acquired above.
- Fig. 2 is a diagram illustrating a configuration example of a device description (partial excerpt) owned by a network device (device).
- Fig. 3 is a service description (partial portion) owned by a network device (device).
- FIG. 4 is a diagram for explaining a configuration example of (excerpt). Next, these will be described.
- the device description describes the configuration of network devices (devices) in XML language.
- the embedded device A8 and the embedded device B9 of the network device (device) 11 shown in Fig. 1 are located at the locations starting from "deviceList> evening" as shown by the thin lines in Fig. 2. enumerated using the ⁇ device> tag.
- the functions provided by each embedded device are described using the (service) tag, and these detailed functions are described in XML language.
- the storage destination URL of the service description is obtained.SCPDURL> It is described using
- the service description shown in Fig. 3 shows only the service description (partial excerpt) corresponding to the embedded device A8, and the command that responds to the request from the network device (CP).
- the action is described using the action> tag (enclosed in thin lines in Fig. 3), and the parameters or state variables for the command or action are each described in the argument> service state table. Each is described using tags.
- the network devices (devices) 11 connected to the home network described above do not have a function to dynamically reconstruct the device description 6, so the peripheral devices (devices) 11 1 ⁇ ⁇ Even if the extension peripheral device 12 is connected to the 151 0 or if the embedded device fails, the information is not added to the device description 6 and the remote user B 20 is extended. Since the connection of peripheral devices 1 and 2 cannot be known, it cannot be used as a result. Is caused.
- the network equipment (CP) 19 connected to the home network has the network equipment (device) 11 and the network equipment (device) 15 periodically.
- the device description 6 is obtained by the advertisement message to be issued and by the device search message issued by itself, even if the device description 6 is updated by the rebuilding work, the work and the aforementioned
- the new device description of the network device (device) 11 and the network device (device) 15 is immediately acquired because the description acquisition process is not linked to the latest device configuration. It is difficult to keep track of available functions.
- the device description is dynamically reconstructed, and the fact that the device description is reconstructed is transmitted to other network devices. It is designed to allow notification.
- FIG. 4 is a block diagram showing a configuration of the network device according to the first embodiment of the present invention.
- 40 is a network device
- 41 is a CPU
- 42 is a RAM
- 43 is a ROM
- 44 is a command receiving unit
- 45 is a network connection I / F unit
- 46 is a display control unit
- 47 is an embedded device control unit
- 48 is an embedded device A
- 49 is an embedded device B
- 50 is a peripheral device connection I / F unit
- 51 is a connection status register
- 52 is a peripheral device description register.
- the network device 40 shown in FIG. 4 is a device conforming to the UPnP standard, and corresponds to the network devices (devices) 11 and 15 described with reference to FIG.
- the network device 40 includes a CPU 41, a RAM 42, a ROM 43, a command receiving unit 44, a network connection IZF unit 45, a display control unit 46, an embedded device control unit 47, Embedded devices A48, B49 (corresponding to embedded devices A8, B9 shown in Fig. 1) connected to embedded device controller 47, peripheral device connection IZF unit 50, and these peripheral devices It is composed of a connection status register 51 and a peripheral device description register 52 configured in the connection I / F unit 50, and a description reconstructing means described later.
- the network connection I / F unit 45 is a means for connecting to a home network, and when connecting to a wired network, for example, an Ethernet (registered)
- a wired network for example, an Ethernet (registered)
- IEEE802.1lib for example, when providing a wired communication protocol such as a trademark
- IEEE802.1lib for example, IEEE802.11a
- It is configured to provide a wireless communication protocol such as that described above, and to provide both wired and wireless communication protocols so that it can be connected to both a wired network and a wireless network.
- Peripheral device connection I / F unit 50 allows the user to connect extended peripheral devices such as hard disk drives, small semiconductor memories, DVD drives, digital cameras, digital video cameras, mobile phones, etc.
- Function expansion means that manages the device's sabot function, device-specific information such as vendor code and serial number, and the connection status.It indicates the physical connection status of the expansion peripheral device, and is one-to-one It has a connection status register 51 associated with 1 and a peripheral device description register 52 that stores device-specific information obtained from extended peripheral devices, such as USB, IEEE1394, PC card I / F, etc. It is configured to be able to provide either one of the interfaces suitable for the connection of extended peripheral devices, or a combination of these.
- the command receiving unit 44 is a command receiving unit that receives various instructions from a user, and is used to directly connect an instruction input device such as a mouse or a keypad, or to receive infrared rays from a remote controller. It comprises a light receiving section.
- the display control unit 46 is a means for displaying to a user, and includes various internal states and device configurations of the network device 40, connection status of extended peripheral devices, operation status of embedded devices, and the command reception unit described above. It is configured to be able to provide the display unit with an instruction or the like received from the user at 44 in a data format suitable for the display unit.
- the embedded device control unit 47 shows a case where only the two embedded devices A 48 and B 49 are connected in FIG. 4, it is a control means for arbitrating the operation of each embedded device.
- the functions provided by the embedded device A 48 and the embedded device B 49 include a timer function, a broadcast reception tuner function, and compression of received content to be stored.
- there is a video compression / decompression function that expands the compressed content according to the user's request and sends it from the display control unit 46 to the display unit. It performs control such as arbitrating the right to use the internal bus 53 when storage of the received content and acquisition of the stored contention conflict.
- the description reconstruction means which will be described in detail later, is configured in the ROM 43 and realized by the processing of the CPU, and is extended to the peripheral device connection IZF unit 50 of the network device 40. Whether or not it is possible to open and provide the extended peripheral device to other network devices when the peripheral device is connected, and whether the extended peripheral device that can be provided to other network devices is connected. This is a judgment means for judging whether or not the user is performing the operation.
- a list of extended peripheral devices is described, and the user refers to the device configuration output on the display unit, and a user interface such as a remote controller is used.
- a device information table that can be edited using a device that provides network devices, or a device description or server that the network device 40 is currently providing to other network devices.
- the device description It has the function of rebuilding screw screws.
- the ROM 43 is software that provides a description notification means that provides a series of sequences for notifying that the device description has been rebuilt by the description rebuilding means and has been updated. It stores the description restructuring and notification program, which is a program, and also stores the OS (operating software) and web server software. What? 1141 and 1184 execute the above-mentioned description reconstruction means and notification program, as well as the S and web server software.
- the network device 40 After the power is turned on, the network device 40 reads the device information table stored in the ROM 43 described above into the RAM 42 by an initialization program to perform editing work.
- a mechanism is provided for storing the device information table in the ROM 43 at regular intervals even when the power is turned off or at the end of the operation or during the operation period.
- the network device 40 includes a large-capacity storage means such as a hard disk.
- the contents stored in the above-described R ⁇ M 43 can be stored in a large-capacity storage means such as a hard disk.
- the CPU 41, RAM 42, ROM 43, command receiving unit 44, network connection IF unit 45, display control unit 46, embedded device control unit 47, peripheral device connection I / F unit 50 Are connected to each other by an internal path 53, and the data transfer command can be exchanged between the devices as needed.
- FIG. 5 is a diagram showing a configuration example of the depth information table owned by the network device according to the first embodiment of the present invention, which will be described next.
- the device information table 60 has at least the device name 61, which indicates the extended peripheral device that the network device 40 shown in FIG. 4 can provide to other network devices.
- a connection flag 62 that indicates the connection status of the peripheral device and the reflection status in the device description and can be edited by the user, and a service name (function name) provided by the extended peripheral device described in the device name 61 described above. 6 3 and the service name (function name) 6 3 and the service description previously owned by the network device 40 and the service description indicating the location of the service description. Contains 6 4 and.
- connection flag 62 described above indicates only the connection state immediately after the peripheral device connection IZF section 50 of the network device 40 shown in FIG. 4 is connected to the extended peripheral device matching the device name 61. 0 1 b (where b represents a binary number) is self-contained.
- the above-mentioned extended peripheral device is added to the device description, it indicates the connection state and the reflection state (addition) to the device description 1 1b is described.
- 10b indicating only the non-connection state is described in the connection flag 62.
- 0 0b indicating the reflection state (deletion) to the representation is described.
- connection flag 6 2 the initial state of the connection flag 62 is 0b.
- the peripheral device connection I / F section 50 When an extension peripheral device is connected to the peripheral device connection I / F section 50, the peripheral device The connection I / F unit 50 issues a peripheral device connection notification to the CPU 41 indicating that the extended peripheral device has been connected. Although a specific method of transmitting the peripheral device connection notification is not omitted in FIG. 4, an interrupt for connecting the CPU 41 and the peripheral device surrounding I / F unit 50 in a point-to-point manner is provided. This can be done using signals.
- the CPU 41 When the CPU 41 receives the above-mentioned peripheral device connection notification, the CPU 41 refers to the connection status register 51 and the peripheral device description register 52 of the peripheral device connection IZF unit 50 to specify the connected extended peripheral device. . Then, the CPU 41 obtains appropriate information from the above-described peripheral device description register 52, and further refers to the device information table to determine whether the connected extended peripheral device is the device information table 60 shown in FIG. If it is described in the device information table 60, it is determined that it can be provided to the network device (CP), and the connection flag 62 of the device information table 60 is set to 01b, and the flow shown in FIG. Starts the description reconstruction and notification program in the additional processing described later.
- the CPU 41 displays the extended peripheral device that cannot be reflected in the device description via the display control unit 46 on the display unit. Outputs the connection and notifies the user. In this case, the description reconstruction and notification program described above will not be activated.
- the peripheral device connection I / F unit 50 sends a peripheral device disconnection notification indicating that the extension peripheral device has been removed to the CPU 41. Issue. Although a specific method of transmitting the peripheral device leaving notification is not omitted in FIG. 4, an interrupt for connecting the CPU 41 and the peripheral device connection I / F unit 50 point by point is provided. This can be done using signals.
- the CPU 41 When the CPU 41 receives the above-described peripheral device disconnection notification, the CPU 41 reads the connection status register 51 and the peripheral device description register 52 of the peripheral device connection I / F 50 to identify the detached peripheral device. refer. Then, the CPU 41 obtains appropriate information from the above-described peripheral device description register 52, and further refers to the device information table to determine which extended peripheral device has left the device information table 6 shown in FIG. Noted at 0 If it is listed, it is determined that it is impossible to provide it to the network device (CP), and 10b is described in the connection flag 62 of the device information table 60 described above, and the flow shown in FIG. Starts the description reconstruction and notification program in the deletion process described later.
- the CPU 41 does not activate the description restructuring and notification program.
- the description restructuring and notification program is also started when the connection flag 62 of the device information table 60 shown in FIG. 5 is changed.
- Such a change of the connection flag 62 may, for example, delete the above-mentioned extended peripheral device from the device description in order to conceal the connected peripheral device so as not to provide it to other network devices. It is performed by the user in some cases. In this case, specifically, the connection flag 62 in the state of l ib is updated to 0 1 b by the user.
- the description reconstruction and notification program shown in the concealment process in the flow shown in FIG. 6 is started.
- the need for concealment can occur, for example, when the connected expansion peripheral is a hard disk drive and its free space is no longer available, forbidding remote users from further use. Occurs. It also occurs when the connected peripheral device is a DVD drive and it is not allowed to be accessed by remote users when it is not allowed to flow over the network due to the nature of the content.
- FIG. 6 is a flowchart illustrating the processing operation of the description reconstruction program and the notification program of the network device according to the first embodiment of the present invention, which will be described next.
- the processing of the description reconstruction and notification program described here is performed by connecting the extended peripheral devices described in the device information table. It is executed when the pit related to reflection of the connection flag of the device information table in the description is changed by the user or when the user leaves, or when the user explicitly changes the pit related to the reflection of the connection flag of the device information table in the description.
- the peripheral flag 62 is referred to in the device information table 60, and the line in which the connection flag indicates 0 1 b, that is, the extended peripheral device is connected.
- a line indicating that it is in a state where it can only be found is searched, and as a result of the search, it is determined whether or not the corresponding line exists (steps 101 and 102).
- step 102 If it is determined in step 102 that there is a line in which the connection flag indicates 0 1 b, the current device description is obtained from the memory, and the device name and the device name are obtained from the device information table 60. The service name and the location of the service description are obtained (steps 103 and 104).
- step 107 After that, 11b indicating that the connected extended peripheral device has been registered in the device description is described in the connection flag of the device information table, and the processing from step 101 is performed. Then, the processing shifts to the processing of the next row to be searched (step 107).
- step 102 If it is determined in step 102 that the line in which the connection flag indicates 0 1 b does not exist in the device information table any more, the final device description is stored. Create a new advertisement message describing the URL to be sent and send it via multicast (step 108).
- connection flag 6 in the device information table 60 is displayed.
- connection flag indicates 10b that is, the extension
- the line indicating that the connection of the peripheral device is disconnected is searched, and as a result of the search, it is determined whether or not the corresponding line exists (steps 111, 112).
- step 1 12 If it is determined in step 1 12 that there is a line in which the connection flag indicates 10b, the current device description is obtained from the memory, and the device information table 60 Get the first name (steps 1 1 3 and 1 1 4).
- step 112 if it is determined in step 112 that the line in which the connection flag is described as 10b does not exist in the device information table any more, the URL for storing the final device description is set.
- a new advertisement message described is created and transmitted by multicast (step 118).
- connection flag 62 is referred to in the device information table 60, and the line in which the connection flag indicates 11b, that is, the extension is performed.
- the line that indicates that the peripheral device can be provided to the outside is searched, and as a result of the search, it is determined whether or not the corresponding line exists (steps 121, 122).
- step 1 22 If it is determined in step 1 22 that there is a line in which the connection flag indicates 1 1 b, the current device description is obtained from the memory, and the device name is obtained from the device information table 60. Get (steps 1 2 3 and 1 2 4).
- Step 1 2 3> From the tag section, the part from the ⁇ device> tag to the ⁇ device> tag describing the extended peripheral device obtained in step 124 is deleted, and the reconfigured device description is temporarily stored in the memory. (Steps 1 2 5 and 1 2 6). (4) After that, in the connection flag of the device information table, describe 0 1 b indicating that the extended peripheral device to be concealed has been deleted from the device description, and return to the processing from step 1 1 1. Then, the processing shifts to the processing of the next row to be searched (step 1 17).
- step 122 If it is determined in step 122 that the connection flag indicates 11b in the connection flag and the line of the device for which concealment is instructed no longer exists in the device information table, the final A new advertisement message that describes the URL for storing the new depth description is created and transmitted by multicast (Step 128).
- connection flag 62 is referred to in the device information table 60, and the line in which the connection flag indicates 0 1 b, that is, the extended peripheral device is Search for a row that indicates that the row cannot be provided, and determine whether or not the relevant row exists as a result of the search (steps 131, 132) o
- step 13 If it is determined in step 13 that there is a line in which the connection flag indicates 0 1 b, the current device description is obtained from the memory, and the device name is obtained from the device information table 60. The service name and the location of the service description are obtained (steps 133, 134).
- step 13 4 It is determined whether or not the device name obtained in step 13 4 is already described in the device description obtained in step 13 3. The process goes to 131 to perform the processing for the next row to be searched (step 135).
- step 1 34 If the device name obtained in step 1 34 is not described in the obtained device description in the judgment in step 1 35, the device description obtained in step 1 33 deviceList>device> Add a tag, add the information obtained in step 1 34, and temporarily store the reconstructed device description in the memory (steps 13 6 and 13 7).
- connection flag of the device information table describe 11b indicating that the extended peripheral device for which concealment is to be released was added to the device description, and proceed to the processing from step 131. Then, the process returns to the processing of the next row to be searched (step 1338).
- step 1339 If it is determined in step 1 32 that the connection flag indicates 0 1 b and the row of the device for which concealment release is instructed no longer exists in the device information table, the final A new advertisement message that describes the URL that stores the typical device description is created and transmitted by multicast (Step 1339).
- the network device receives the new advertising message described above and accesses the storage URL to store it. Reconstructed device 'description can be obtained.
- Fig. 7 is a diagram showing an example of a device description included in a network device (device)
- Fig. 8 is a diagram showing an example of a device description reconstructed by a description reconstruction and notification program.
- the device description (DevDesc. Xml) shown in FIG. 7 shows a partial excerpt, and is similar to that described with reference to FIG. Then, a hard disk drive is connected to the peripheral device connection I / F unit 50 of the network device 40 as shown in FIG. 5, and accordingly, a disk drive according to the flow shown in FIG. 6 (A) is connected.
- the device description shown in FIG. 7 is reconstructed as shown in FIG.
- the connected expansion peripherals hard disk drives
- FIG. 9 is a block diagram showing an in-home network configuration for explaining the positioning of network devices in the in-home network according to the first embodiment of the present invention.
- reference numeral 204 denotes a new network device
- reference numeral 205 denotes a hard disk drive
- other reference numerals are the same as those in FIGS.
- the internal configuration of the network device 40 in FIG. 9 is the same as that shown in FIG. 4, and the internal configuration is omitted.
- the home network is the same as in Fig. 1.
- a home network of a house 1 is connected to a public communication network including the Internet via a gateway device 3 and installed in a living 2 according to the first embodiment of the present invention.
- Network devices (devices) 40 network devices (devices) 15 installed in bedrooms 14 and wired network units that are directly connected to the gateway device 3 such as access points 18; It consists of a wireless network unit that is indirectly connected wirelessly via an access point 18 like a network device (CP) 19 in a bedroom 14.
- CP network device
- a hard disk drive 205 is connected to the aforementioned network device (device) 40 as an extension peripheral device, and the device description described with reference to FIG. Network equipment (CP) 19 provided.
- the network device 40 described above is replaced with the network device (device) described in FIG. 4 surrounded by a dotted line in FIG. 9 from the network device (CP) 19.
- the hard disk drive 205 can be used by the user B20 in the remote bedroom 14 because it appears as a new network device 204 that includes 40 and the hard disk drive 205.
- Specific examples of the network device (device) 40 described above include, for example, a hard disk recorder, a DVD player, a video camera, a television, and a remote controller for storing video and music contents.
- an extended peripheral device connected to a network device can be used by a remote user via a network.
- the user can correctly recognize the state from the above-mentioned user, and can freely select whether to use the device for a remote user.
- FIG. 10 is a diagram showing a configuration of a network device according to the second embodiment of the present invention.
- FIG. 6 is a lock diagram.
- a network device according to a second embodiment of the present invention will be described.
- reference numeral 80 denotes a network device
- 81 denotes an embedded device control unit
- 82 denotes a device status register
- other symbols are the same as those in FIG.
- the network device 80 according to the second embodiment of the present invention includes the embedded device control unit 47 of the network device 40 according to the first embodiment of the present invention described with reference to FIG.
- the only difference from the first embodiment is that the embedded device control unit 81 is provided with a status register 82. Therefore, in the following description, description of the network device 80 according to the second embodiment of the present invention other than the embedded device control unit 81 will be omitted.
- the device status register 82 provided in the embedded device control unit 81 of the network device 80 monitors the operation status of each embedded device, and in particular, an abnormality has occurred in the current consumption, operating temperature, etc. of each embedded device. In such a case, the state is held in a one-to-one correspondence with each embedded device, and a warning can be notified to the CPU 41.
- FIG. 11 is a diagram showing a configuration example of a device information table 90 provided in the network device shown in FIG. 10. This will be described next.
- the device information table 90 includes at least each of the built-in devices included in the network device 80 shown in FIG. 10 and other network devices.
- Device name 91 indicating the extended peripheral device that can be provided to the device, and at least the connection status of the extended peripheral device and the status of reflection in the device description can be edited by the user.
- the connection flag 92 which is the same as the connection flag 62 described with reference to Fig. 5, and at least the operation flag 93, which indicates the operation status of the embedded device and the reflection status in the device description and can be edited by the user
- the network device 80 corresponds to the service name (function name) 94 provided by the embedded device or the extended peripheral device described in the device name 91 described above, and the service name (function name) 94 described above. Own That service disc ribs cane down, and a Te part Le describing the location 9 5 of mono- bis descriptor sucrose down indicating the whereabouts.
- the operation flag 93 indicates 1 lb (b indicates the operation state and the state reflected in the device description when the embedded device matching the device name 91 is operating normally. (Representing a binary number). Also, embedded If the device is not operating and is not in operation and is not reflected in the description, 0b is described. In addition, if the embedded device is operating and not reflected in the device description, 0 1b is described, and if the embedded device is not operating and reflected in the device description, 1 0b is described.
- the network device 80 shown in FIG. 10 includes the device information table 90 described above, a table describing only the extended peripheral device portion like the device information table 60 shown in FIG. Can be owned separately as a table that describes.
- the user can edit only the bit that indicates the status of reflection of the above-mentioned operation flag 93 in the description, and can edit the bit from lib to 0 1b and from 0 1b to 11 b. Changes can be made.
- the initial value of the connection flag is 1b when the network device 80 is powered on, otherwise the embedded device is inactive and reflected in the description. It is 10b, which indicates the state in which it is running.
- the embedded device controller 81 When an error is detected in the embedded device A 48 or the embedded device B 49 managed by the embedded device controller 81, the embedded device controller 81 notifies the CPU 41 that an error has occurred in the embedded device. Issue the embedded device error detection notification shown. Although a specific method of transmitting the embedded device abnormality detection notification is not shown in FIG. 10, the CPU 41 and the peripheral device connection IZF unit 50 are connected point by point. This can be performed using an interrupt signal.
- the CPU 41 Upon receiving the embedded device abnormality detection notification, the CPU 41 refers to the device status register 82 included in the embedded device control unit 81 to identify the embedded device that has detected the abnormality. Then, the CPU 41 writes 10b in the operation flag 93 of the device information table 90 shown in FIG. 11 and starts the description reconstruction and notification program for the embedded device.
- the description restructuring and notification program is also started when the user changes the operation flag 93 of the device information table 90 shown in FIG.
- Such a change of the operation flag 93 may be performed, for example, by decompressing the embedded device so as not to provide it to other network devices. This is performed by the user, for example, when deleting the above-mentioned embedded device from the disk discussion.
- the user updates the operation flag 93 in the lib state of the corresponding embedded device to 01b.
- the description restructuring and notification program shown in the flow of the concealment processing in FIG. 12B to be described later is started.
- FIG. 12 is a flowchart illustrating the processing operation of the disk device reconstruction and notification program of the network device according to the second embodiment of the present invention, which will be described next.
- the processing of the description reconstruction and notification program described here is related to the failure of the embedded device described in the device information table or the reflection of the operation flag explicitly in the description by the user. Executed when a bit changes.
- the operation flag is referred to as the operation flag in the device information table, and the line with the operation flag described as 10b, that is, the embedded device cannot be provided to the outside A row indicating that the row is in the correct state is searched, and as a result of the search, it is determined whether or not the corresponding row exists (steps 141, 142).
- step 144 If it is determined in step 144 that there is a line in which the operation flag is set to 10b, the current device description is obtained from the memory, and the device information table 90 is read from the device information table 90. Obtain names (steps 144, 144).
- step 144 From the tag section of the device description (16 ⁇ ⁇ 61 ⁇ 31) tag obtained in step 144, describe the embedded device obtained in step 144 device>device> Delete the part up to the evening and temporarily store the reconstructed device description in memory (steps 144, 146) (4) Then, the operation flag in the device information table is set to Enter 0b indicating that the failed embedded device has been deleted from the device description, return to the process from step 141, and move on to the process for the next row to be searched (step 1 4 7).
- step 142 if there is no more line in the device information table with 10b described in the operation flag, the final device disk description is deleted.
- a new advertisement message that describes the URL to be stored is created and transmitted by multicast (step 118).
- the operation flag 93 of the device information table 90 is referred to, and the line in which the operation flag indicates 1 1b, that is, the embedded device is A row indicating that it can be provided to the outside is searched, and as a result of the search, it is determined whether or not the corresponding row exists (steps 151, 152).
- step 15 2 In the determination of step 15 2, if there is a row in which the operation flag indicates 1 1 b, the current device description is acquired from the memory, and the device information is read from the device information table 90. Get the first name (steps 15 3 and 15 4).
- step 15 After that, in the connection flag of the device information table, describe 0 1 b indicating that the extended peripheral device to be concealed has been deleted from the device description, and return to the processing from step 15 1.
- the processing shifts to the processing of the next row to be searched (step 157).
- step 152 If it is determined in step 152 that the operation flag is set to lib and the line of the device for which concealment is instructed no longer exists in the device information table, the final A new advertisement message that describes the UR that stores the device description is created and transmitted by multicast (step 158).
- the operation flag 93 in the device information table 90 is referred to, and the line with the operation flag set to 0 1 b, that is, the embedded device is The line indicating that it cannot be provided is searched, and as a result of the search, it is determined whether or not the corresponding line exists (steps 161, 162).
- step 162 If it is determined in step 162 that there is a line in which the operation flag indicates 0 1 b, the current device description is obtained from the memory and the device name is obtained from the device information table 90. The service name and the location of the service description are obtained (steps 163 and 164).
- step 164 It is determined whether or not the device name obtained in step 164 has already been described in the depth description obtained in step 163. If the device name has already been described, step 1 6 The process moves to 1 to perform the processing for the next row to be searched (step 1655).
- step 164 If the device name obtained in step 164 is not described in the obtained device description in the judgment in step 165, the device description obtained in step 163 ic eL is dev ice) Add a tag, add the information obtained in step 16 4, and temporarily store the reconstructed device description in the memory (step 1 6 6 , 1 67).
- step 168 After that, in the operation flag of the device information table, describe the lib that indicates that the embedded device for which concealment is to be released has been added to the device description, and return to the processing from step 161. Then, the processing shifts to the processing of the next row to be searched (step 168).
- step 162 If it is determined in step 162 that the connection flag indicates 0 1 b and the row of the device for which concealment release is instructed no longer exists in the device information table, the final A new advertisement message that describes the URL that stores the typical device description is created and transmitted by multicast (Step 169).
- FIG. 13 is a diagram illustrating an example of a device description reconstructed by the process described with reference to FIG. 12.
- the embedded device A 48 of the network device 80 is The following describes the description reconstruction and the change of the device description by the notification program shown in Fig. 12 (A) when a failure occurs.
- FIG. 14 is a block diagram showing a home network configuration for explaining the positioning of network devices in the home network according to the second embodiment of the present invention.
- reference numeral 212 denotes a new network device, and other reference numerals are the same as those in FIGS.
- the internal configuration of the network device 40 in FIG. 14 is the same as that shown in FIG. 10, and the internal configuration other than the embedded device A 48 and the embedded device B 49 is omitted.
- the home network is the same as in FIG.
- the home network of the house 1 is connected to a public communication network including the Internet via a gateway device 3 and installed in the living room 2 according to the second embodiment of the present invention.
- Network equipment (devices) 80, network equipment (devices) 15 installed in bedrooms 14 and 15 A wired network section directly connected to gateway device 3 like access point 18 and bedrooms 14 It is composed of a wireless network unit that is indirectly connected wirelessly via an access point 18 like a certain network device (CP) 19.
- CP network device
- the device description described with reference to FIG. CP) 19 provided. That is, as described above, the network device 80 starts from the network device (CP) 19, as shown by the dotted line in FIG. Device) New network at 80 except embedded device A48 Risk that the faulty embedded device A48 cannot be seen by the user B20 in the remote bedroom 14 because the user sees it as a remote device (device) 212. Sex can be excluded.
- Each processing in each embodiment of the present invention described above can be configured as a processing program, and this processing program is stored in a recording medium such as HD, DAT, FD, MO, DVD-ROM, and CD-ROM. Alternatively, it can be provided via a network.
- the network device which is a device compliant with the UPnP standard, recognizes the connection status of the extension peripheral device and the operation status of the built-in embedded device and automatically performs the operation.
- the device description can be dynamically reconstructed by grasping the device configuration by using or by enabling the instruction from the user to be a trigger, and the reconstruction is completed. It is possible to notify the network device which is the control point of the device description that has been made.
- the digital device according to the present invention can be used for network information home appliances and digital home appliances.
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Abstract
Description
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