JP2004104839A - Information processing apparatus and method, and communication system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To know UPnP equipment from 1394 equipment. <P>SOLUTION: A UPnP control point is connected to an IEEE802 network, and the 1394 equipment is connected to an IEEE1394 network. The IEEE802 network and the IEEE1394 network are connected via a UPnP device which functions as a bridge. The UPnP device inputs a packet which is transmitted from the UPnP control point from a general bus input plug 52, converts the packet into a format of the IEEE1394 network, and transfers the packet from an output plug 53 to the 1394 equipment via the IEEE1394 network. The UPnP device stores the corresponding relationship of the plugs. <P>COPYRIGHT: (C)2004,JPO

Description

The present invention relates to an information processing apparatus and method, and a communication system, in particular, a device connected to one of a first network based on IEEE802 and a second network based on IEEE1394, and a device connected to the other. The present invention relates to an information processing apparatus and method, and a communication system that can be known.

Recently, a network using an IEEE (Institute of Electrical and Electronics Engineers) 1394 high-speed serial bus (hereinafter simply referred to as an IEEE 1394 network) has become widespread. By connecting audio devices and video devices to this IEEE 1394 network, each device can control other devices using AV / C commands.

On the other hand, the IEEE802 network is also widespread. The IEEE 802 is a network for mainly connecting personal computers to each other, and each personal computer can control another personal computer based on the UPnP (Universal Plug and Play) protocol.

However, the IEEE 1394 network and the IEEE 802 network are independent from each other, and devices connected to the IEEE 1394 network (hereinafter, referred to as 1394 devices) are connected to the devices connected to the IEEE 802 network (hereinafter, UPnP devices). However, there was a problem that it was not possible to know what kind of device it was.

The present invention has been made in view of such a situation, and is intended to enable a 1394 device to know a UPnP device.

An information processing apparatus according to the present invention comprises: a first input unit for inputting a first packet from a first network; a second input unit for inputting a second packet from a second network; Third input means for inputting a third packet from the first network, first converting means for converting the first packet input from the first input means into a second packet, A second conversion unit that converts the first packet input from the input unit into a third packet, and a third conversion unit that converts the third packet input from the third input unit into a first packet. Conversion means, a first output means for outputting a first packet to the first network, a second output means for outputting a second packet to the second network, and a third output means for outputting the second packet to the second network. Output which outputs the packet of And analyzing a packet input from the first to third input means, and based on the analysis result, the first to third input means, the first to third conversion means, and the first to third conversion means. The correspondence between the output means is determined, and the control means controls the first to third input means, the first to third conversion means, and the first to third output means, and is determined by the control means. First storage means for storing correspondence information of the first to third input means, first to third conversion means, and first to third output means; and a second network. A second storage unit that stores an identification information correspondence table indicating a correspondence relationship between the identification information uniquely possessed by the electronic device and the identification information in the second network assigned to the electronic device; The first input means input by the first input means When the packet is a stream acquisition command, stream data consisting of a first packet corresponding to the stream acquisition command is input from a first network by first input means, and stream data consisting of the input first packet is input. Is converted into a second packet by the first conversion means and output from the second output means, and a command based on IEEE1394 related to the stream data is generated and output from the third output means. If the first packet input from the input means is a command other than the stream acquisition command, the input first packet is converted into a third packet by the second conversion means, and the third packet is output from the third output means. Output, and the second conversion means outputs the second packet to the second network input as the first packet from the first input means. Converting the identification information inherent in the connected electronic device into identification information in the second network assigned to the electronic device based on the identification information correspondence table stored by the second storage means; By converting a first command based on IEEE 802, which is input as a first packet from one input means, into a second command based on IEEE 1394, the first packet is converted into a third packet, The third converting means converts the response to the second command based on IEEE 1394, which is input as the third packet from the third input means, into the response to the first command based on IEEE 802, thereby obtaining the third It is characterized in that a packet is converted into a first packet.

A first information processing method according to the present invention includes a first conversion step of converting a first packet input from a first input plug into a second packet, and a first conversion step of converting the first packet input from the first input plug. A second conversion step of converting one packet into a third packet; a third conversion step of converting a third packet input from a third input plug into a first packet; Analyzing the packets input from the first to third input plugs, determining the correspondence between the first to third input plugs, the processing of the first to third conversion steps, and the first to third output plugs; A control step of controlling the first to third input plugs, the first to third conversion steps, and the first to third output plugs; Input plug, 1st to 1st A conversion step, and a first storage step of storing correspondence information of the first to third output plugs; identification information inherent to the electronic device connected to the second network; A second storage step of storing an identification information correspondence table indicating a correspondence relationship with the identification information in the allocated second network, wherein the control step comprises the steps of: In the case of a stream acquisition command, stream data composed of a first packet corresponding to the stream acquisition command is input from a first network by a first input plug, and stream data composed of the input first packet is In the process of the first conversion step, the packet is converted into a second packet, output from the second output plug, and streamed. A command based on IEEE 1394 related to data is generated and output from the third output plug. If the first packet input from the first input plug is a command other than the stream acquisition command, the input first The packet is converted into a third packet in the processing of the second conversion step and output from the third output plug, and the second conversion step is input as the first packet from the first input plug. Based on the identification information correspondence table stored in the process of the second storage step, the identification information inherent in the electronic device connected to the second network is stored in the second network assigned to the electronic device. The first command based on IEEE 802, which is converted into identification information and input as the first packet from the first input plug, is converted into the second command based on IEEE 1394. And converting the first packet into a third packet by converting the first packet into a third packet from a third input plug based on the IEEE 1394 command. The third packet is converted into the first packet by converting the response into a response to a first command based on IEEE802.

The communication system according to the present invention is characterized in that the first electronic device transmits the first command in a format based on IEEE802 for controlling the second electronic device and the identification information inherent in the second electronic device to the first electronic device. A transmitting unit that transmits the packet using a packet, wherein the relay device receives the first packet from the first network and a second input unit that inputs a second packet from the second network; Input means, third input means for inputting a third packet from the second network, and first input means for converting the first packet input from the first input means into a second packet A conversion unit, a second conversion unit that converts the first packet input from the first input unit into a third packet, and a third packet input from the third input unit. To convert to the third packet Conversion means, a first output means for outputting a first packet to the first network, a second output means for outputting a second packet to the second network, and a third output means for outputting the second packet to the second network. A third output unit for outputting the first packet and a packet input from the first to third input units are analyzed, and based on the analysis result, the first to third input unit and the first to third conversion units are analyzed. Means for determining the correspondence between the means and the first to third output means, and controlling the first to third input means, the first to third conversion means, and the first to third output means. Means, and first storage means for storing correspondence information of the first to third input means, first to third conversion means, and first to third output means determined by the control means. , The second electronic device connected to the second network is A second electronic device including second storage means for storing an identification information correspondence table indicating a correspondence relationship between identification information possessed by the second electronic device and identification information in the second network assigned to the second electronic device; Includes receiving means for receiving a second command transmitted using the second packet, and the control means of the relay device determines that the first packet input by the first input means is a stream acquisition command In this case, stream data composed of a first packet corresponding to the stream acquisition instruction is input from the first network by the first input unit, and the stream data composed of the input first packet is converted to the first conversion unit. Is converted into a second packet by the second output means, and a command based on IEEE 1394 related to the stream data is generated. When the first packet input from the first input unit is a command other than the stream acquisition instruction, the input first packet is converted by the second conversion unit into the third packet. The packet is converted into a packet and output from the third output unit, and the second conversion unit of the relay device is connected to the second network connected to the second network and input as the first packet from the first input unit. Converting the identification information inherent in the electronic device into identification information in the second network assigned to the second electronic device based on the identification information correspondence table stored by the second storage means; By converting the first command based on IEEE802, which is input as the first packet from the first input means, into the second command based on IEEE1394, the first packet is converted into the third packet. And converting the response to the second command based on IEEE 1394, which is input as the third packet from the third input means, to the first command based on IEEE 802. The third packet is converted into the first packet by converting the third packet into a response.

According to a second information processing method of the present invention, a first command in a format based on IEEE802 for controlling a second electronic device and identification information inherent in the second electronic device in the first electronic device are provided. A transmitting step of transmitting using the first packet, a first converting step of converting the first packet input from the first input plug into a second packet in the relay device, A second conversion step of converting a first packet input from the first input plug into a third packet, and a third packet input from the third input plug in the relay device. A third conversion step of converting the packet into one packet, and analyzing the packet input from the first to third input plugs in the relay device, and analyzing the first to third input plugs and the first to third input plugs. The processing of the conversion step and the correspondence between the first to third output plugs are determined, and the first to third input plugs, the first to third conversion steps, and the first to third output plugs are determined. Correspondence between the control step to be controlled, the first to third input plugs, the first to third conversion step processing, and the first to third output plugs determined by the control step processing in the relay device A first storing step of storing the related information, and a correspondence between the identification information inherent in the electronic device connected to the second network in the relay device and the identification information in the second network assigned to the electronic device. A second storing step of storing an identification information correspondence table indicating a relationship, and a receiving step of receiving a second command transmitted using a second packet in the second electronic device. The control step in the relay device includes, when the first packet input by the first input plug is a stream acquisition command, stream data including the first packet corresponding to the stream acquisition command. Stream data consisting of the input first packet is input from the first network by the first input plug, converted into a second packet in the processing of the first conversion step, and output from the second output plug. At the same time, a command based on IEEE 1394 related to the stream data is generated and output from the third output plug. If the first packet input from the first input plug is a command other than the stream acquisition instruction, the input is performed. The first packet is converted to a third packet by the processing of the second conversion step, and the third output The second conversion step in the relay device, which is output from the lag, includes identification information uniquely input to the second electronic device connected to the second network and input as the first packet from the first input plug. Converting the identification information in the second network assigned to the second electronic device based on the identification information correspondence table stored in the process of the second storage step, The first command based on IEEE 802, which is input as a packet based on IEEE 1394, is converted into a second command based on IEEE 1394, thereby converting the first packet into a third packet. Transmits a response to a second command based on IEEE 1394, which is input as a third packet from a third input plug, to a second command based on IEEE 802. By converting the response to the command, and converting the third packet to the first packet.

In the information processing apparatus and method, and the communication system according to the present invention, when the input first packet is a stream acquisition command, stream data including the first packet corresponding to the stream acquisition command is transmitted from the first network. While being input, converted into a second packet and output to the second network, a command based on IEEE 1394 related to the stream data is generated and output to the second network. When the input first packet is a command other than the stream acquisition command, the input first packet is converted into a third packet, output to the second network, and input as the first packet. The identification information inherent to the electronic device connected to the second network is converted into identification information in the second network assigned to the electronic device based on the stored identification information correspondence table, The first command based on IEEE802, which is input as a packet of the above, is converted into a second command based on IEEE1394, so that the first packet is converted into a third packet. In addition, the response to the second command based on IEEE 1394, which is input as the third packet, is converted into the response to the first command based on IEEE 802, so that the third packet is converted into the first packet. You.

According to the present invention, devices connected to the first network can be known from devices connected to the second network.

FIG. 1 shows a configuration of a network system to which the present invention is applied. In this configuration, the UPnP control point 1 is connected to the IEEE802 network 11. 1394 devices 3 and 4 are connected to the IEEE 1394 network 12. The IEEE802 network 11 and the IEEE1394 network 12 are connected to a UPnP device (1394 proxy) 2, respectively.

FIG. 2 shows a configuration example of the UPnP device 2. 2, a CPU (Central Processing Unit) 21 executes various processes according to a program stored in a ROM (Read Only Memory) 22 or a program loaded from a storage unit 28 into a RAM (Random Access Memory) 23. I do. The RAM 23 also stores data and the like necessary for the CPU 21 to execute various processes.

(4) The CPU 21, the ROM 22, and the RAM 23 are mutually connected via the bus 24. The bus 24 is also connected to an input / output interface 25.

The input / output interface 25 includes an input unit 26 including a keyboard and a mouse, a display including a CRT and an LCD, an output unit 27 including a speaker, a storage unit 28 including a hard disk, a modem, a terminal adapter, and the like. The configured communication unit 29 is connected. The communication unit 29 performs communication processing via the IEEE 802 network 11 or the IEEE 1394 network 12.

A drive 30 is connected to the input / output interface 25 as necessary, and a magnetic disk 41, an optical disk 42, a magneto-optical disk 43, a semiconductor memory 44, or the like is appropriately mounted thereon, and a computer program read out from them is It is installed in the storage unit 28 as needed.

UPnP devices (UPnP control point 1 and UPnP device 2 in the case of FIG. 1) mainly include addressing (Addressing), discovery (Discovery), description (Description), control (Control), and eventing (Eventing). , Presentation (Presentation).

Addressing is a function for each UPnP device to acquire an address on the IEEE802 network 11, and uses DHCP (Dynamic Host Configuration Protocol) or AutoIP.

(4) Discovery is performed after addressing, whereby the UPnP control point 1 can find a target device to be controlled. The protocol used here is SSDP (Simple Service Discovery Protocol). When connected to the IEEE 802 network 11, each device multicasts a message for notifying devices and services in itself to the IEEE 802 network 11 (particularly, transmits a packet without specifying a partner). The UPnP control point 1 can know what device is connected to the IEEE802 network 11 by receiving the multicast message.

Conversely, the UPnP control point 1 can check the devices currently connected to the IEEE802 network 11. At this time, the UPnP control point 1 multicasts a search command on the IEEE802 network 11 using the device or service to be discovered as a keyword. Each device connected to the IEEE 802 network 11 unicasts a response to the search command if the device satisfies the conditions specified in the multicast search command (by designating the other party, Send packet). Thereby, the UPnP control point 1 can detect a device connected to the IEEE802 network 11.

Also, each device broadcasts that fact beforehand even when it deviates from the IEEE802 network 11.

(4) The URL (Uniform Resource Locator) of the device description (Device Description) is described in the SSDP packet output by the control target device discovered by the UPnP control point 1 by the discovery. The UPnP control point 1 can obtain more detailed device information of the device from the device description by accessing the URL. The device information includes icon information, a model name, a producer name, a product name, and the like.

In addition, the device information describes service information of the device, and a service description (Service Description) in which detailed information of the service is described can be traced from the URL described in the service information. Can be.

The UPnP control point 1 can know how to access the target from the device information (Device Description) and the service information (Service Description).

In addition, a Presentation URL described later is also described in the device description.

Device Description and Service Description are expressed in XML (Extensible Markup Language).

Control is broadly classified into two: action and query. The Action is performed according to the method specified in the action information of the Service Description, and by invoking the Action, the UPnP control point 1 can operate the target.

On the other hand, Query is used to retrieve the value of stateVariable of Service Description. The value of stateVariable represents the state of the device.

Control uses a transport protocol called SOAP (Simple Object Access Protocol). XML is used as the expression language.

Eventing is used to notify the UPnP control point 1 from the target when the value of stateVariable is changed. The UPnP control point 1 can know the variable held by the target from the stateVariable by analyzing the Service Description. By outputting the Subscription to the target, the UPnP control point 1 can receive a notification from the target when the variable of which sendEvents is yes is changed among the variables. . Eventing uses a transport protocol called GENA (General Event Notification Architecture). XML is used as the expression language.

Presentation is used to provide the user with control means using a user interface (UI). By accessing the Presentation URL described in the Device Description, a Presentation Page described in HTML (Hyper Text Markup Language) can be obtained. With that function, an application can be prepared at the target.

The UPnP device (1394 proxy) 2 functions as a bridge between the IEEE 802 network 11 and the IEEE 1394 network 12, and internally has a device model shown in FIG. The device model of this example is configured with one root device (root device) 61, and the root device 61 has an IEEE 1394 proxy service 71 and an IEEE 1394 node service 72. I have.

The IEEE 1394 proxy service (hereinafter simply referred to as a proxy service) 71 includes a bus reset occurrence of the IEEE 1394 network 12, a bus ID, the number of nodes, a bus manager, a node unique ID (NUID) of an isochronous resource manager, and a gap count (Gap Count). ), And self ID packets (Self ID packets).

The IEEE 1394 node service (hereinafter, simply referred to as a node service) 72 exchanges Link-On packets, Phy packets including Phy Configuration packets, etc., and asynchronous packets and isochronous packets.

FIG. 4 shows the structure of the asynchronous packet.

Asynchronous communication is used for asynchronous data communication. In this Asynchronous communication, it is ensured that a packet is transmitted to the partner node, and the transmission delay time is not guaranteed. The transmitting node transmits the header information and the actual data to the designated destination node, and the receiving node returns an Acknowledge packet to notify the other party that the packet has been received. However, if a broadcast packet that does not specify a destination node is received, an Acknowledge packet is not returned.

A destination_ID (Destination identifier) is placed at the head of the # 1394 packet header. This indicates the node_ID of the packet transmission destination.

$ Tl (transaction label) is a label for recognizing a match between a pair of transactions of a request packet and a response packet. The tl of the request packet is also used as the tl of the response packet.

Rt (retry code) represents information on a retry method when a busy acknowledge is received.

Tcode (transaction code) represents a type code of the transaction packet. That is, it indicates which of read / write / lock and request / response.

Pri (priority) is set to all 0 (excluding cycle start) in fair arbitration.

Source_ID (source identifier) indicates the node_ID of the packet transmission source.

Next to <source_ID>, packet-type-specific information is arranged, and further, packet-type-specific data is arranged as necessary. At the end of the 1394 packet header, the CRC for the above header information is inserted as hader_CRC.

Following the # 1394 packet header, a data block is arranged. A data block includes a required number of data block quadlets and data_CRC as a CRC for data information.

FIG. 5 shows the structure of an isochronous packet. Data_length specifies the byte value of the data field following the header. If this value is 0, it indicates that there is no data field.

Tag (isochronous data format tag) indicates the format of the isochronous packet.

Channel represents a channel number used for identifying an isochronous packet. tcode (transaction code) represents a code indicating the type of packet. The Isochronous packet is set to Ah.

Sy (synchronization code) is used to exchange synchronization information such as video and audio between the transmitting node and the receiving node.

The data field (data block payload) represents isochronous data.

FIG. 6 shows the configuration of the AV / C device model of the proxy service 71. The AV / C device model 50 has an isochronous input plug (Isochronous Input Plug) 51 and a general bus input plug (General Bus Input Plug) 52 as input plugs, and has an isochronous output plug (Isochronous Output Plug) as an output plug. Plug 53 and a General Bus Output Plug 54. As the isochronous input plug 51, a plug with a number of 00h to 1Eh can be provided, as the general bus input plug 52, a plug with a number of 40h to 5Eh can be provided, and as the isochronous output plug 53, 00h. Plugs with numbers from 1Eh to 1Eh can be provided, and plugs with numbers from 40h to 5Eh can be provided as the general bus output plugs 54.

ア イ ソ An isochronous packet is input to the isochronous input plug 51. A packet other than the isochronous packet (for example, a packet in the IEEE802 network 11) is input to the general bus input plug 52.

The isochronous output plug 53 outputs an isochronous packet, and the general bus output plug 54 outputs another packet (for example, a packet of the IEEE802 network 11).

The AV / C device model 50 basically outputs the data input from the isochronous input plug 51 from the isochronous output plug 53 and the data input from the general bus input plug 52 to the general bus output plug 54. The input and output are switched as necessary, and the data input from the isochronous input plug 51 is output from the isochronous input plug 54, and the data input from the general bus input plug 52 is output from the isochronous output plug. Output from the plug 53.

Next, a process when the UPnP control point 1 connected to the IEEE 802 network 11 controls a device connected to the IEEE 1394 network 12 will be described with reference to the flowchart in FIG.

In step S1, the UPnP control point 1 subscribes (SUBSCRIBE) to the proxy service 71 constituting the 1394 proxy device 2 so as to notify the proxy service 71 of the change when the IEEE1394 network 12 is changed. In step S11, when receiving the subscribe, the proxy service 71 executes processing corresponding to the subscribe.

For example, assuming that the 1394 device 3 is now connected to the IEEE 1394 network 12 in step S41, a bus reset occurs in the 1394 device 3 in step S42. Similarly, in step S21, the 1394 device 3 transmits to the node service 72 of the root device 61. , A bus reset occurs. At this time, the node service 72 notifies the proxy service 71 of the occurrence of the bus reset in step S22.

When detecting the notification from the node service 72 in step S12, the proxy service 71 transmits the 1394 device to the UPnP control point 1 in step S13 based on the subscription from the UPnP control point 1 captured in step S11. 3 notifies (NOTIFY) that it has been connected to the IEEE 1394 network 12.

に お い て In step S2, the UPnP control point 1 receives a notification from the proxy service 71. Thus, the UPnP control point 1 can know that the 1394 device 3 has been connected to the IEEE 1394 network 12.

Therefore, in step S3, the UPnP control point 1 invokes, for example, an action request packet based on SOAP corresponding to an asynchronous read request command for reading information recorded at a predetermined address of the register of the 1394 device 3. Invoke).

FIG. 8 shows an example of a request message transferred from the UPnP control point 1 to the node service 72 at this time. The UPnP control point 1 generates this request message with reference to the 1394 Nodes Service Description shown in FIGS.

The number “5” included in the Transaction indicates a transaction label as a label for recognizing which request the response corresponds to since the response is returned in response to this request. .

Nunuid included in Body represents the node unique ID (NUID) of the transmission destination of this message. In the case of the present example, the NUID of the 1394 device 3 is shown. The NUID “086004600000000000” is the one described in the notification acquired from the proxy service 71 in the process of step S2. This NUID is converted into the node ID of the 1394 device 3 (“ffc0” in the example of FIG. 9) based on the correspondence table of the node service 72, and stored in the destination_ID of the packet in FIG.

$ Command represents the type of command that the UPnP control point 1 requests the node service 72 to generate. That is, in this example, the occurrence of the asynchronous read request command is requested.

“00000100000” (hexadecimal number) on the MSB side included in the command includes the transaction label tl, retry code rt, transaction code tcode, and transaction label tl in FIG. 9 in the read request for data quadlet packet shown in FIG. Represents the priority Pri.

“Fffff0000404” on the LSB side corresponds to destination_offset in FIG. That is, this value indicates the address of the register of the 1394 device 3 that the UPnP control point 1 wants to read.

Note that the node ID of the node service 72 (“ffc1” in the example of FIG. 9) is described in the source_ID field of FIG.

た め Since these values are all expressed in text, any type of IEEE 1394 packet can be described.

Returning to FIG. 7, upon receiving the invoke of the action shown in FIG. 8 in step S23, the node service 72 generates an asynchronous read request packet as shown in FIG. Then, the data is transmitted to the 1394 device 3 via the IEEE 1394 network 12. At this time, the node service 72 stores the correspondence between the request shown in FIG. 8 and the request packet shown in FIG. 9 in the correspondence table.

Upon receiving the asynchronous read request packet transmitted from the node device 72 in step S43, the # 1394 device 3 executes a process corresponding to the request (in this case, reading the register). In step S44, the 1394 device 3 generates a response packet as shown in FIG. 10 corresponding to the request packet, and transmits it to the node service 72.

よ う As shown in FIG. 10, the value of the transaction code tcode is “6” representing the response.

As the values of destination_ID and source_ID, the values in the read request for data quadlet packet in FIG. 9 are used as they are. In quadlet data, data read from the address of destination_offset is arranged.

Upon receiving the response packet transmitted from the 1394 device 3 in step S25, the node service 72 generates a response as an action based on the SOAP protocol as shown in FIG. 11 in step S26, and transmits the response to the UPnP control point 1. Send.

On the basis of the correspondence table, the value “5” shown in the transaction shown in FIG. 11 corresponds to the value “5” of the transaction in FIG. Is set to “5” (the same value).

{Response} is described in the body of FIG. 11 to indicate that the body corresponds to the asynchronous read response of 1394. Then, data of “00000001600000000000000013333334” is described therein. This data is a value described in the quadlet data of FIG. 10 and is a value read from the offset address of the 1394 device 3. In step S4, the UPnP control point 1 reads this value.

In this example, next, in step S5, the UPnP control point 1 writes a command for controlling a predetermined operation of the 1394 device 3 (in this case, turning on the power of the 1394 device 3) in the SOAP. Invoke a request packet of the action based on the request packet.

The UPnP control point 1 creates this message (command) with reference to a 1394 Nodes Service Description shown in FIGS. 20 to 23 described later of the node service 72.

Upon receiving the invoke of the action in step S27, the node service 72 generates an AV / C command (AV / C POWER control command) in step S28, and generates the AV / C command (AV / C power control command). Send to

The AV / C node service 72 generates and holds a correspondence table of NUID and node ID, and updates it every time a bus reset occurs. The NUID is converted into a node ID based on the correspondence table and transferred to the IEEE 1394 network 12.

When the # 1394 device 3 receives the AV / C POWER control command transmitted from the node device 72 in step S45, it turns on the power of the device in accordance with the content of the command. After that, in step S46, the 1394 device 3 generates an AV / C response (AV / C POWER response) corresponding to the response, and transmits it to the node service 72.

Upon receiving the AV / C POWER response transmitted from the 1394 device 3 in step S29, the node service 72 generates a response as an action based on the SOAP protocol in step S30, and transmits the response to the UPnP control point 1.

The node service 72 generates and holds a table (correspondence table) for holding a transaction correspondence. That is, when the AV / C POWER control command is received in step S27 and the AV / C POWER control command is output in step S28, it is stored in the table that both correspond. Therefore, by referring to this table, when the AV / C POWER response is transmitted from the 1394 device 3, the node service 72 recognizes that it is a response corresponding to the AV / C POWER control command. be able to.

Then, upon receiving the AV / C POWER response in step S29, the node service 72 generates a response of the action based on the SOAP in step S30, and transmits the response to the UPnP control 1.

@UPnP control point 1 receives this response in step S6. Thereby, the UPnP control point 1 can know that the 1394 device 3 has turned on the power of the device.

According to the AV / C specification, it is specified that an AV / C device returns an INTERIM as a response when it cannot immediately execute a process corresponding to a received request. When the processing corresponding to the request is completed thereafter, the AV / C device returns a final response to the request sender at that time.

時間 However, the time from receiving the request until the final response is returned is not specified. Therefore, after outputting the AV / C command to the 1394 device 3 in the process of step S28, the node service 72 manages the time until receiving the AV / C response from the 1394 device 3 in the process of step S29. When a response is received within a predetermined time (for example, 30 seconds) set in advance, if the response is not INTERIM (if it is a final response), the AV / C node service 72 determines whether the received response is The corresponding response is immediately transferred to UPnP control point 1.

On the other hand, if the received response is INTERIM, the AV / C node service 72 waits until 30 seconds elapse after transmitting the AV / C command. Then, when a response (final response) other than INTERIM is received before 30 seconds have elapsed, a response corresponding to the final response is output. If no final response is received within 30 seconds, the AV / C node service 72 outputs INTERIM as a response. Thereby, the UPnP control point 1 can know whether or not the requested processing can be completed within at least 30 seconds.

In the example of FIG. 7, further, in step S7, the UPnP control point 1 invokes the get Stream of the action based on the SOAP.

FIG. 12 shows an example of a message generated and output in this case.

“5” represents a transaction label, and “getStream xmlns” represents an action name. “Protocol” specifies a protocol used for transferring a stream on the IP. "Uri" specifies the file on the IP that is sent by Isochronous.

When the proxy service 71 receives the invoke of the get Stream from the UPnP control point 1 in step S14, the proxy service 71 executes a process of acquiring the stream flowing to the IEEE802 network 11 in step S15 in response thereto. At this time, it is assumed that the stream of the proxy service 71 has been input to the general bus input plug 52 of the AV / C device model 50. When this stream is sent to the IEEE 1394 network 12, the proxy service 71 performs a packet format conversion process and connects the general bus input plug 52 to the isochronous output plug 53.

{Circle around (2)} It requests the node service 72 to transmit the packet to the IEEE 1394 network 12. The node service 72 executes a process based on this request in step S31.

に し て In this way, the connection relationship between the input plug and the output plug is stored (reflected) in the built-in memory.

That is, this stores the correspondence of which plug of the plurality of input plugs is connected to which of the plurality of output plugs. Therefore, the 1394 device 3 can know the UPnP device connected to the IEEE802 network 11 by referring to this storage (table).

FIG. 13 shows an example of a table stored in the node service 72. In this example, the node service 72 has a total of four plugs, plugs 1 to 4, of which the plug 1 is used as the general bus input plug 52 with the number (ID) 40, The plug 4 is used as a general bus input plug 52 having a number (ID) 41. In the former, data in the MEPG format is input, and in the latter, data in the Audio format is input.

In step S16, the proxy service 71 generates a response of getStream as an action corresponding to the action received in step S14, and outputs the generated response to the UPnP control point 1. The UPnP control point 1 receives this in step S8.

FIG. 14 shows an example of a message in this case. The transaction label “5” corresponds to the transaction label in FIG.

In the example of FIG. 7, further, in step S47, the 1394 device 3 outputs an AV / C Input Plug Signal Format Status Command to the node service 72. This command requests notification of a device connected to the input plug in the AV / C device model 50.

FIG. 15 shows the format of this command. In the Opcode, a value 19h indicating that this command is INPUT PLUG SIGNAL FORMAT is described.

One number for specifying the input plug is described in the $ plug field.

Upon receiving the command from the 1394 device 3 in step S32, the node service 72 executes processing corresponding to the command in step S33. That is, the device connected to the designated input plug is read out and output to the 1394 device 3 as an AV / C Input Plug Signal Format Status Response. In step S48, the 1394 device 3 receives this Response and reads the contents thereof, thereby being able to know the UPnP device connected to the IEEE802 network 11.

FIG. 16 shows the format of the Response in this case. This format is the same as the INPUT PLUG SIGNAL FORMAT control command format.

In the $ fmt field, "010000" is described for Audio, and "100,000" is described for Video MEPG2.

In the $ plug field, the value described in the plug field of the command format in FIG. 15 is described as it is.

The $ fdf field describes the time at which the plug was connected.

In order to execute the above processing, the root device 61 of the device model of the 1394 proxy 2 shown in FIG. 3 has the 1394 Proxy Device Description shown in FIG. 17, and the proxy service 71 is shown in FIG. 18 and FIG. The node service 72 has the 1394 Proxy Service Description shown in FIGS. 20 to 23.

These Descriptions describe the parameters and other conditions required to execute the function of the device, and when the other device requests the device to execute the function, the Description By referencing, the conditions described therein are added and a command is sent to the device.

DeviceThe deviceType “urn: sony-corp: device: 1394ProxyDevice: 1” in FIG. 17 indicates that the device type is a Proxy Device. FriendlyName “proxy for IEEE1394” indicates a friendly name of the root device 61.

UDN “nuid: upnp-1394proxy-root-0800460000000000” represents a unique number of the root device 61.

In this Device Description, two services are described. One is a service whose serviceType is "urn: sony-corp: service: 1394ProxyService: 1", and the other is a service whose serviceType is "urn: sony-corp: service: 1394NodeService: 1". is there. That is, the former is a service corresponding to the proxy service 71 of FIG. 3, and the latter is a service corresponding to the node service 72 of FIG.

The SCPDURL “./scpd/proxyScpd.xml” of the former service represents the URL of the Proxy Service Description of the proxy service 71 (specifically, the URL of the Proxy Service Description shown in FIGS. 18 and 19). .

The SCPDURL “./scpd-nodeScpd.xml” of the latter service represents the URL of the Nodes Service Description (specifically, the 1394 Nodes Service Description shown in FIGS. 20 to 23) of the node service 72. .

The action in the 1394 Proxy Service Description of FIGS. 18 and 19 indicates various actions, and the action named “busRest” indicates an action that causes a bus reset. The action named “getNodeNum” represents an action for acquiring the number of nodes on the 1394 bus. The action named "getIrmId" represents an action for acquiring the NUID of an IRM (Isochronous Resource Manger) on the 1394 bus.

Action The action named “getBmId” represents an action for acquiring the NUID of the bus manager on the 1394 bus. The action named “getGapCount” represents an action for acquiring the Gap Count on the 1394 bus.

The action named “getSelfIdPacket” indicates an action for acquiring a SelfID packet flowing on the 1394 bus.

Action In the action named “getNodeNum”, an argument whose direction is “out” (namely, an argument output from another device and transferred) is defined. In the argument “nodeNum”, a related rule is described in the serviceStateTable. That is, it is described that "nodeNum" is an argument that causes an event to occur to the SUBSCRIBE device and, when there is a change in the state variable, outputs the data form as "i1".

Action The action of “getIrmId” specifies an argument whose “direction” of the “nuid” name is “out”. In the action of "getGapCount", an argument whose direction of "gapCount" is "out" is specified, and in the action of "getSelfIdPacket", an argument whose direction of "selfIdPacket" is "out" is specified. Have been. These arguments do not notify the subscribing device of the event even if any of the state variables change, and that the data format is "bin.hex" and is output from each device. ing.

{Actions of “asyncReqSend”, “avcCommandSend”, “phyPacketSend”, and “LinkOnPacketSend” are defined in the 1394 Nodes Service Description of FIGS.

Action The action named "asyncReqSend" indicates an action of transmitting an asynchronous packet. Based on this action, the actions shown in FIGS. 8 and 11 are generated.

ア ク シ ョ ン In this action, an argument whose direction of the name of “nuid” is “in” (an argument output to another device and input to another device) is defined. The data type of the argument “nuid” is “bin.hex”.

Action The action of “asyncReqSend” further defines an argument of “asyncReqest” whose direction is “in” and an argument of “asyncResponse” whose direction is “out”.

Similarly, the argument of the direction “asyncRequest” with the direction “in” and the argument of the name “asyncResponse” with the direction “out” are defined as having the data form “bin.hex”.

Action The action named "avcCommandSend" indicates an action for transmitting an AV / C command. As a result, an action associated with the processing in steps S5 and S30 in FIG. 7 is generated.

Action The action named “phyPacketSend” indicates an action of transmitting a Phy packet. This command defines an argument whose name is "in" for the direction of "phyPacket" and an argument whose direction is "out" for the name of "phyPacketResp", and these arguments have a related variable "phyPacket". , And its data type is “ui4”.

Action The action named "LinkOnPacketSend" indicates an action for transmitting a LinkOn packet. This action has an argument whose direction of “phyId” is “in”. The data type of this argument is “i1”.

The series of processes described above can be executed by hardware, but can also be executed by software. When a series of processing is executed by software, a program constituting the software executes various functions by installing a computer built in dedicated hardware or installing various programs. For example, it is installed from a network or a recording medium into a general-purpose personal computer or the like.

As shown in FIG. 2, the recording medium is a magnetic disk 41 (including a floppy disk) on which the program is recorded and an optical disk 42 (CD) which are distributed in order to provide the user with the program separately from the apparatus main body. -Only composed of package media including ROM (compact disk-read only memory), DVD (digital versatile disk), magneto-optical disk 43 (including MD (mini-disk)) or semiconductor memory 44 Instead, it is provided with a ROM 22 storing a program and a hard disk included in the storage unit 28, which are provided to the user in a state of being incorporated in the apparatus main body in advance.

In this specification, a step of describing a program recorded on a recording medium may be performed in chronological order according to the described order, or may be performed in parallel or not necessarily in chronological order. This also includes processes executed individually.

シ ス テ ム In this specification, the system represents the entire device including a plurality of devices.

FIG. 1 is a diagram illustrating a configuration of a network system to which the present invention is applied. FIG. 2 is a block diagram showing a configuration of the UPnP device 2 in FIG. FIG. 2 is a diagram illustrating a configuration of a device model included in the UPnP device 2 of FIG. 1. FIG. 3 is a diagram illustrating a configuration of an asynchronous packet. FIG. 3 is a diagram illustrating a configuration of an isochronous packet. FIG. 4 is a diagram illustrating a configuration of an AV / C device model included in the 1394 proxy service in FIG. 3. 2 is a flowchart illustrating processing of the network system in FIG. 1. FIG. 8 is a diagram showing a configuration of a message output in step S3 of FIG. FIG. 8 is a diagram illustrating a configuration of a packet output in a process of step S24 in FIG. 7; FIG. 8 is a diagram illustrating a configuration of a packet output in a process of step S44 in FIG. 7; FIG. 8 is a diagram illustrating an example of a message output in the process of step S26 in FIG. 7. FIG. 8 is a diagram illustrating an example of a message output in the process of step S7 in FIG. 7. FIG. 4 is a diagram illustrating an example of a correspondence table held by the node service in FIG. 3; FIG. 8 is a diagram illustrating an example of a message output in the process of step S16 in FIG. 7. FIG. 8 is a diagram illustrating a configuration of a packet output in a process of step S47 in FIG. 7. FIG. 8 is a diagram illustrating a configuration of a packet output in a process of step S48 in FIG. 7. FIG. 4 is a diagram illustrating a configuration of a 1394 Proxy Device Description included in a root device of FIG. 3. FIG. 4 is a diagram illustrating a configuration of a 1394 Proxy Service Description of the 1394 proxy service of FIG. 3. FIG. 4 is a diagram illustrating a configuration of a 1394 Proxy Service Description of the 1394 proxy service of FIG. 3. FIG. 4 is a diagram illustrating a configuration of a 1394 Nodes Service Description included in the 1394 nodes service of FIG. 3. FIG. 4 is a diagram illustrating a configuration of a 1394 Nodes Service Description included in the 1394 nodes service of FIG. 3. FIG. 4 is a diagram illustrating a configuration of a 1394 Nodes Service Description included in the 1394 nodes service of FIG. 3. FIG. 4 is a diagram illustrating a configuration of a 1394 Nodes Service Description included in the 1394 nodes service of FIG. 3.

Explanation of reference numerals

$ 1 UPnP control point, $ 2 UPnP device, $ 3,4 1394 device, $ 11 IEEE 802 network, $ 12 IEEE 1394 network, $ 61 root device, $ 71 1394 proxy service, $ 72 1394 nodes service

Claims (4)

A first network communicating with a first packet in a format based on IEEE 802 and a second network communicating in a second packet in a synchronous communication format based on IEEE 1394 and a third packet in an asynchronous communication format based on IEEE 1394; In an information processing apparatus connected to both and exchanging data between the first network and the second network,
First input means for inputting the first packet from the first network;
Second input means for inputting the second packet from the second network;
Third input means for inputting the third packet from the second network;
First conversion means for converting the first packet input from the first input means into the second packet;
A second conversion unit that converts the first packet input from the first input unit into the third packet;
Third conversion means for converting the third packet input from the third input means into the first packet,
First output means for outputting the first packet to the first network;
Second output means for outputting the second packet to the second network;
Third output means for outputting the third packet to the second network;
The packet input from the first to third input means is analyzed, and based on the analysis result, the first to third input means, the first to third conversion means, and the first to third conversion means. Control means for determining the correspondence of the output means, and controlling the first to third input means, the first to third conversion means, and the first to third output means,
First storage means for storing the correspondence information of the first to third input means, the first to third conversion means, and the first to third output means determined by the control means. When,
A second storage unit that stores an identification information correspondence table indicating a correspondence relationship between the identification information uniquely owned by the electronic device connected to the second network and the identification information in the second network assigned to the electronic device. Storage means,
The control means, when the first packet input by the first input means is a stream acquisition instruction, converts the stream data composed of the first packet corresponding to the stream acquisition instruction into the first network. From the first input means, converts the stream data comprising the input first packet into the second packet by the first converting means, and outputs the converted data from the second output means. And a command based on the IEEE 1394 associated with the stream data is generated and output from the third output means, and a first packet input from the first input means is a command other than the stream acquisition instruction. In the case of the above, the input first packet is converted into the third packet by the second conversion means. Converted and output from the third output means,
The second conversion unit stores, in the second storage unit, identification information uniquely input to the electronic device connected to the second network, which is input as the first packet from the first input unit. Means for converting to the identification information in the second network assigned to the electronic device based on the identification information correspondence table stored by the means, and being input as the first packet from the first input means; Converting the first command based on the IEEE 802 into a second command based on the IEEE 1394, thereby converting the first packet into the third packet;
The third conversion unit converts a response to a second command based on the IEEE 1394, which is input as the third packet from the third input unit, to a response to a first command based on the IEEE 802. Thereby converting the third packet into the first packet. A first network communicating with a first packet in a format based on IEEE 802 and a second network communicating in a second packet in a synchronous communication format based on IEEE 1394 and a third packet in an asynchronous communication format based on IEEE 1394; A first input plug connected to both, for exchanging data between the first network and the second network, and for inputting the first packet from the first network; A second input plug for inputting the second packet from the network, a third input plug for inputting the third packet from the second network, and the first input plug to the first network. A first output plug for outputting a packet, and a second output plug for outputting the second packet to the second network. An output plug, the information processing method of an information processing apparatus and a third output plugs for outputting said third packet to the second network,
A first conversion step of converting the first packet input from the first input plug into the second packet;
A second conversion step of converting the first packet input from the first input plug into the third packet;
A third conversion step of converting the third packet input from the third input plug into the first packet;
The packet input from the first to third input plugs is analyzed, and the processing of the first to third input plugs, the processing of the first to third conversion steps, and the processing of the first to third output plugs are performed. A control step of determining the correspondence and controlling the first to third input plugs, the first to third conversion steps, and the first to third output plugs;
A process for storing correspondence information of the first to third input plugs, the processes of the first to third conversion steps, and the first to third output plugs determined in the process of the control step. One storage step;
A second storage unit that stores an identification information correspondence table indicating a correspondence relationship between the identification information uniquely owned by the electronic device connected to the second network and the identification information in the second network assigned to the electronic device. And a storage step.
The control step, when the first packet input by the first input plug is a stream acquisition command, converts the stream data composed of the first packet corresponding to the stream acquisition command into the first network. From the first input plug, the stream data composed of the input first packet is converted into the second packet by the processing of the first conversion step, and the second output plug And a command based on the IEEE 1394 associated with the stream data is generated and output from the third output plug, and the first packet input from the first input plug is other than the stream acquisition command. In the case of this command, the input first packet is processed by the second conversion step. To the third packet and output from the third output plug,
The second conversion step includes the step of: storing the identification information uniquely input to the electronic device connected to the second network, input as the first packet from the first input plug, in the second storage. Based on the identification information correspondence table stored in the process of step, the identification information is converted into identification information in the second network assigned to the electronic device, and is converted from the first input plug to the first packet. Converting the input first command based on the IEEE 802 into a second command based on the IEEE 1394, thereby converting the first packet into the third packet;
The third conversion step converts a response to a second command based on the IEEE 1394, which is input as the third packet from the third input plug, to a response to a first command based on the IEEE 802. Thereby converting the third packet into the first packet. A first electronic device connected to a first network communicating in a first packet in a format based on IEEE 802;
A second electronic device connected to a second network communicating in a second packet in a synchronous communication format based on IEEE 1394 and a third packet in an asynchronous communication format based on IEEE 1394;
A communication system, comprising: a relay device connected to both the first network and the second network, for relaying data between the first network and the second network;
The first electronic device includes:
A transmission unit configured to transmit, using the first packet, a first command in a format based on the IEEE 802 for controlling the second electronic device and identification information unique to the second electronic device. ,
The relay device,
First input means for inputting the first packet from the first network;
Second input means for inputting the second packet from the second network;
Third input means for inputting the third packet from the second network;
First conversion means for converting the first packet input from the first input means into the second packet;
A second conversion unit that converts the first packet input from the first input unit into the third packet;
Third conversion means for converting the third packet input from the third input means into the first packet,
First output means for outputting the first packet to the first network;
Second output means for outputting the second packet to the second network;
Third output means for outputting the third packet to the second network;
The packet input from the first to third input means is analyzed, and based on the analysis result, the first to third input means, the first to third conversion means, and the first to third conversion means. Control means for determining the correspondence of the output means, and controlling the first to third input means, the first to third conversion means, and the first to third output means,
First storage means for storing the correspondence information of the first to third input means, the first to third conversion means, and the first to third output means determined by the control means. When,
Identification information correspondence indicating a correspondence between identification information inherent in the second electronic device connected to the second network and identification information in the second network assigned to the second electronic device; Second storage means for storing a table,
The second electronic device includes:
Including receiving means for receiving the second command transmitted using the second packet,
The control unit of the relay device, when the first packet input by the first input unit is a stream acquisition instruction, converts the stream data including the first packet corresponding to the stream acquisition instruction into the stream data. The stream data composed of the input first packet is input from the first network by the first input means, and the stream data composed of the input first packet is converted into the second packet by the first conversion means. Output from the output unit, generate a command based on the IEEE 1394 relating to the stream data, and output the generated command from the third output unit. The first packet input from the first input unit is used to acquire the stream. In the case of a command other than the command, the input first packet is converted into the second packet by the second conversion unit. 3 and output from the third output means.
The second conversion unit of the relay device includes identification information uniquely input to the second electronic device connected to the second network and input as the first packet from the first input unit. Is converted into identification information in the second network assigned to the second electronic device based on the identification information correspondence table stored by the second storage means, and the first input Converting the first command based on the IEEE 802, input as the first packet from the means, into a second command based on the IEEE 1394, thereby converting the first packet into the third packet. ,
The third conversion unit of the relay device transmits a response to the second command based on the IEEE 1394, which is input as the third packet from the third input unit, to the first command based on the IEEE 802. A communication system, wherein the third packet is converted into the first packet by converting the third packet into a response. A first electronic device connected to a first network communicating in a first packet in a format based on IEEE 802;
A second electronic device connected to a second network communicating in a second packet in a synchronous communication format based on IEEE 1394 and a third packet in an asynchronous communication format based on IEEE 1394;
A first input plug for inputting the first packet from the first network, a second input plug for inputting the second packet from the second network, and A third input plug for inputting the third packet, a first output plug for outputting the first packet to the first network, and outputting the second packet to the second network. And a third output plug for outputting the third packet to the second network, the second output plug being connected to both the first network and the second network, An information processing method for a communication system comprising: a first network and a relay device that relays data between the second network and the second network.
The first packet of the first electronic device, comprising: a first command in a format based on the IEEE 802 for controlling the second electronic device; and identification information unique to the second electronic device. A transmitting step of transmitting using;
A first conversion step of converting, in the relay device, the first packet input from the first input plug into the second packet;
A second conversion step of converting, in the relay device, the first packet input from the first input plug into the third packet;
A third conversion step of converting the third packet input from the third input plug into the first packet in the relay device;
The relay device analyzes packets input from the first to third input plugs, processes the first to third input plugs, the processing of the first to third conversion steps, and the first to third conversion plugs. A control step of determining the correspondence between the three output plugs and controlling the first to third input plugs, the first to third conversion steps, and the first to third output plugs;
Correspondence relationship between the first to third input plugs, the first to third conversion steps, and the first to third output plugs determined by the control step in the relay device. A first storage step of storing information;
In the relay device, an identification information correspondence table indicating a correspondence relationship between identification information uniquely owned by an electronic device connected to the second network and identification information in the second network assigned to the electronic device. A second storing step of storing;
A receiving step of receiving the second command transmitted using the second packet, in the second electronic device,
The control step in the relay device, when the first packet input by the first input plug is a stream acquisition command, the stream data consisting of the first packet corresponding to the stream acquisition command, The stream data composed of the input first packet is input from the first network by the first input plug, and is converted into the second packet by the processing of the first conversion step. 2 and outputs a command based on the IEEE 1394 associated with the stream data and outputs the command from the third output plug. The first packet input from the first input plug is In the case of a command other than the stream acquisition command, the input first packet is In the process of the conversion step 2, the packet is converted into the third packet and output from the third output plug,
The second conversion step in the relay device includes identifying information uniquely input to the second electronic device connected to the second network and input as the first packet from the first input plug. Is converted into identification information in the second network assigned to the second electronic device based on the identification information correspondence table stored in the processing of the second storage step, and By converting the first command based on the IEEE 802, which is input as the first packet from the input plug of the first plug into a second command based on the IEEE 1394, the first packet is converted into the third packet. Converted,
The third conversion step in the relay device includes, as a response to a second command based on the IEEE 1394, which is input as the third packet from the third input plug, for a first command based on the IEEE 802. An information processing method, comprising: converting the third packet into the first packet by converting the third packet into a response.

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