JPH022248A - Communication network control method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for controlling a communication network configured by connecting a plurality of terminals via a connecting device to a system in which a plurality of terminals are connected by a transmission path and communicate with each other. It is something.

Prior Art The prior art will be explained with reference to FIGS. 6 to 8. Fig. 6 shows an example of the configuration of a communication network to which the control method of the present invention is applied, Fig. 6 shows an example of the message structure of a home bus system, which is one of the systems related to the present invention, and Fig. 7 shows a conventional example. FIG. 8 is a diagram showing the address structure of a conventional video telephone.

In the conventional home bus system control method, the message structure is as shown in FIG. well connected and communicated with each other 3
, in a communication network configured by connecting multiple communication systems to connecting devices, the terminal address is one unique address related to the link layer (
device address) and multiple functional addresses (subdevice addresses) that define layers above the link layer existing under the device address, each subdevice address of a terminal on a certain system is A communication network control method characterized by providing a command for controlling from equipment on another system connected by a connecting device.

(2) The command includes a part indicating the command type, a part specifying the sub-device address of the device on the source bus, and a sub-device address of the device with which the sub-devices of the device on the receiving source bus communicate with each other. The address of each device on the system connected by a connecting device (hereinafter referred to as gateway) is a second service device address (hereinafter referred to as 5SDA) 64. Destination address Sub-device address (hereinafter referred to as DSDA) 66° Sub-device address (hereinafter referred to as SA') 62,
Subbus destination address address (hereinafter referred to as D
63 (referred to as A'), but did not have a means to specify a subdevice address under S person° or D person°.

Consider the case where the two systems connected by the gateway in FIG. 5 are both home bus systems.

Assume now that the terminal a56 is a TV telephone consisting of a TV and a telephone, and the terminal Muro3 is its controller.

At this time, in the conventional home bus system control method using control messages as shown in FIG.
And your phone as a terminal! Since there is no means to specify it as a subdevice of L66, the terminal &66 can be used as a TV as shown in Figure 8.
and the address related to the data link for each phone TV
82, it was necessary to have a telephone 83. That's no good,
For example, if you want to control the TV and telephone timers simultaneously from the controller (terminal operator 63), as shown in FIG. 71)
, the gateway (55) composes a request message specifying the address of the controller (terminal person 63) as SA' and sends it to the TV phone (terminal 1L56) Tv84 (72).
. Upon receiving it, the TV84 sends the request message B [Therefore, after setting the timer, the controller (
Gateway 65 sends a response message specifying terminal A33)
(73), and the gateway sends a response message B specifying the address of the video phone (terminal A66) as the S person to the controller (terminal A33) (74). Similarly,
Request telegrams C, c and response telegrams C, c regarding telephone timer settings are transmitted and received between the controller (terminal Muro 3) and the video telephone (terminal 2L66) via the gateway 66 (76-78).

Problems to be Solved by the Invention As described above, when a device connected to a home bus controls a subdevice of a device connected to another system that does not share a transmission path, the device that has a subdevice on the other system Since it is necessary to have an address related to the data link for each subdevice, there are problems such as the total number of connected devices in the system becomes small and the expandability of devices with subdevices decreases. . In addition, when you want to control multiple subdevices at the same time, you need as many communication sequences as the number of subdevices you want to control, which causes problems such as poor control immediacy and increased traffic on the bus. had.

It is an object of the present invention to solve the above-mentioned problems in the prior art and to make it possible to specify subdevices on a system that do not share a transmission path connected by a connecting device.

Means to Solve the Problem In a communication network constructed by connecting multiple terminals via a transmission path and communicating with each other using a connecting device, a subsystem of one terminal on a certain system A command is provided for specifying the sub-device address of a terminal on another system connected by the connection device from the device address.

Effect: The above means makes it possible to specify subdevices on the system that do not share the transmission path connected by the connection device, and equipment with subdevices does not need to have an address related to the data link for each subdevice. Effects that increase the total number of connected devices in a system to which devices with subdevices are connected, effects that improve the expandability of devices that have subdevices, effects that improve the immediacy of control of subdevices, and traffic on transmission paths. It has the effect of reducing the amount of data and has excellent expandability for future changes.

Example Embodiments of the present invention will be described using FIGS. 1 to 5.

Fig. 1 shows an example of the structure of a sub-device address designation command that is an embodiment of the present invention, Fig. 2 shows an example of the structure below the header of a message using the command shown in Fig. 1, and Fig. FIG. 4 shows a communication sequence in this embodiment, FIG. 4 shows an address structure of a TV telephone in this embodiment, and FIG. 6 shows an example of the structure of a communication network to which the control method of the present invention is applied.

As shown in FIG. 1, the subdevice address designation command of this embodiment includes the operator code 11 and an operand indicating the subbus source address (hereinafter referred to as SSD), which is the original subdevice address of SSD. 13,
Subbus destination address (hereinafter referred to as DSD module) which is the original subdevice address of DA'
Operand 14 indicating SSD person ゛ 13 or I) 3
I) It is composed of operans 1'12 indicating the presence or absence of A14, service group, etc. Operand 13 exists only when bit 1 of operand 12 is specified as O, and operand 14 exists only when bit 0 of operand 12 is specified as 0.

Figure 2 shows an example of the structure of the message following this command's header.

As an application example of this command, as in the conventional example, the two systems connected to the gateway 56 in FIG. 5 are both home bus systems, and the terminal a56 is a TV phone consisting of a TV and a telephone. Consider the case where A53 is the controller. By using the commands of the present invention, it is possible to specify the subdevice of the video phone (terminal a66) from the controller (terminal 53). The device address 41 of the TV phone and its subdevice address TV42. It consists of a telephone 43.

Therefore, if the controller (terminal user 3) wants to set the TV and telephone timers of T'/telephone (terminal &66) at the same time, the controller (terminal user 53) should set the timers for the TV and telephone at the same time.
) specifies the device address 42 of the video phone as Dmu°, and sends a request-type writer with a control command for the subdevice TM01 and the telephone 43 at the same time to the gateway 66 as a compound command (31), and the gateway 65 A request message a specifying the address of the controller (terminal Muro 3) as SA' is sent to the video telephone (terminal a66) (32). The video phone that received the request message a (terminal a6
6) After setting each timer for TV and telephone, DA'
The response message a specifying the address of the controller (terminal A33) is sent to the gateway 65 (33), and the gateway 56 sends the videophone (terminal A56) as SA'.
) is sent to the controller (terminal A33).

As described above, according to this embodiment, by introducing the sub-device addressing command into the home bus system, it is possible to communicate from the home bus to other devices with fewer communication sequences without having to provide a device address for each sub-device. It becomes possible to control subdevices of equipment connected to the system.

Effects of the Invention As is clear from the above description, the present invention provides a system in which a plurality of terminals are connected by a transmission path and communicate with each other, in a communication network configured by connecting a plurality of terminals by a connecting device. By providing a command to specify the subdevice address of a terminal on another system connected by the connecting device from the subdevice address of one terminal on the system, the transmission path connected to the connecting device can be changed. It is possible to specify subdevices on the system that are not shared, and since equipment with subdevices does not need to have an address related to the link layer for each subdevice, it is possible to specify subdevices on the system to which the equipment with subdevices is connected. The effect of increasing the total number of connected devices, the effect of improving the expandability of devices with subdevices, the effect of improving the immediacy of control of subdevices, the effect of reducing transmission path traffic, and the communication specifications of lower layers. This has the effect of making it possible to build applications that are unaffected by changes.

[Brief explanation of the drawing]

Figure 1 is a configuration diagram of an example of the subdevice specification command according to the present invention, Figure 2 is an explanatory diagram showing an example of the configuration below the header of a message using the command shown in Figure 1, and Figure 3 is an illustration of the configuration of the subdevice specification command according to the present invention. Explanatory diagram showing the communication sequence in the embodiment of
Fig. 5 is a block diagram of a TV main telephone address in an embodiment of the present invention, Fig. 5 is a block diagram of an example of a communication network to which the present invention is applied, and Fig. 6 is a telegram block diagram of a home bus system in a conventional example of the present invention. , FIG. 7 is an explanatory diagram showing a communication sequence in a conventional example of the present invention, and FIG. 8 is a diagram showing a TV main telephone address configuration in a conventional example of the present invention. 11...Operation code of sub-device address specification command, 12...Operand of sub-device address specification command 1.13...
- Operand 2 of subdevice address specification command.
14...Operand of subdevice address specification command 3.31...Request message, 32...
...Request message, 33...Response message, 34...
...Response message, 41...TV main telephone address,
42...TV main telephone sub-device TV sub-device address, 43...TV' telephone sub-device Telephone sub-device address, 61...
・Transmission line, 62...Transmission line, 63...
Terminal A164...Terminal B, 66...Gateway, 56...Terminal a, 67...
・Terminal b171...Request message, 72...
・Request '1π sentence, 73...Response message, 74...
...Response message, completion 5...Request IE sentence, 76
...Request message, 77...Response message, A8
...Response message, 82...TV address, 83...Telephone address. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
Figure (1) HD+M' + OPC+Figure 3

Claims (2)

[Claims] (1) In a communication network constructed by connecting a system in which multiple terminals are connected by transmission paths and communicate with each other using multiple connecting devices, the terminal address is one unique address (device address) related to the link layer. ) and multiple functional addresses (subdevice addresses) that define layers above the link layer existing under the device address,
A communication network control method comprising providing a command for controlling individual subdevice addresses of a terminal on one system from a device on another system connected by a connecting device. (2) The command includes a part indicating the command type, a part specifying the subdevice address of the device on the source bus, a part specifying the subdevice address of the device on the receiving source bus, and a part specifying both of the subdevice addresses. 2. The communication network control method according to claim 1, further comprising a part for specifying presence/absence of a communication network.