JPH0810866B2 - Communication network control method - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of controlling a communication network configured by connecting a plurality of systems in which a plurality of terminals are connected by a transmission line and communicate with each other by a connecting device. It is a thing.

Conventional Technology The conventional technology will be described with reference to FIGS.
FIG. 5 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 telegram configuration of a home bus system which is one of the systems according to the present invention, and FIG. 7 shows a conventional example. FIG. 8 is a diagram showing the address configuration of the videophone in the conventional example.

In the conventional home bus system control method, the telegram structure is as shown in FIG. 6, and it is connected by the sub device address of a device that communicates with each other on the same transmission line or a connection device (hereinafter referred to as a gateway). The addresses of the devices on the system are the source subdevice address (hereinafter referred to as SSDA) 64, the destination address subdevice address (hereinafter referred to as DSDA) 65, the subbus source address (hereinafter referred to as SA ′) 62, and the subbus, respectively. It was equipped with means for designating the destination address address (hereinafter referred to as DA ') 63, but was not equipped with means for designating the subdevice address under SA' or DA '.

Consider the case where the two systems connected by the gateway in FIG. 5 are both home bus systems. It is now assumed that the terminal a56 is a videophone including a TV and a telephone, and the terminal A53 is its controller.

At this time, in the conventional home bus system control method using the control message as shown in FIG. 6, the terminal A53 has no means for designating the TV and the telephone as subdevices of the terminal a56. As shown in the figure, it was necessary to give each of the TV and the telephone an address TV82 and a telephone 83 related to the data link. Therefore, for example, when it is desired to simultaneously control each timer of the TV and the telephone from the controller (terminal A53), as shown in FIG. 7, first, the request message B specifying the address of the terminal a56 as DA ′ is sent to the gateway 55. (71), the gateway (55) constructs a request message b in which the address of the controller (terminal A53) is designated as SA 'and sends it to the TV84 of the videophone (terminal a56) (72).
The TV 84 which received it sets the timer according to the request message B, and then sends a response message b specifying the controller (terminal A53) as DA 'to the gateway 55 (73), and the gateway sends SA' as the videophone (terminal a56). The response message B specifying the address of () is sent to the controller (terminal A53) (74). Similarly, the request message C, c and the response message C, c related to the telephone timer setting are the controller (terminal A53).
And a videophone (terminal a56) via the gateway 55 (75-78).

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, a device having a subdevice on another system Since each subdevice needs to have an address related to the data link, it has a problem that the total number of connected devices in the system becomes small and the expandability of devices having subdevices decreases. . In addition, when you want to control multiple sub-devices at the same time, the communication sequence is required for the number of sub-devices you want to control, so there are problems that the immediacy of control is poor and that traffic on the bus increases. Had.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems in the prior art and to enable designation of subdevices on a system that do not share a transmission path connected by a connection device.

Means for Solving the Problems In a communication network configured by connecting a plurality of systems in which a plurality of terminals are connected by a transmission line and communicate with each other, a subdevice address of one terminal on a system To provide a command for designating a sub device address of a terminal on another system connected by the connection device.

By the above means, it is possible to specify a subdevice on the system that does not share the transmission path connected by the connection device, and a device having a subdevice does not need to have an address related to a data link for each subdevice. Actions that increase the total number of connected devices in a system to which devices with subdevices are connected, actions that improve the expandability of devices that have subdevices, actions that improve the immediacy of control of subdevices, and traffic on transmission lines It has the effect of reducing the above-mentioned effect and the effect of being excellent in expandability for future changes.

EXAMPLE An example of the present invention will be described with reference to FIGS.

FIG. 1 shows an example of the structure of a sub-device addressing command which is an embodiment of the present invention, and FIG. 2 shows an example of the structure below the header of a message using the command shown in FIG.
FIG. 4 is a diagram showing a communication sequence in this embodiment, FIG. 4 is a diagram showing an address configuration of a video telephone in this embodiment, and FIG. 5 is a diagram showing an example of a configuration of a communication network to which the control system of the present invention is applied.

The sub-device addressing command of this embodiment is the first
As shown in the figure, the operand 13 that indicates the sub-bus source address (hereinafter referred to as SSDA ') that is the sub-device address under the operation code 11, SA', and the sub-device address that is the sub-device address under DA ' Operand that indicates the bus destination address (hereinafter referred to as DSDA ')
14 and an operand 12 indicating the presence or absence of SSDA′13 or DSDA′14 and a service group. Operand 13 exists only when bit 1 of operand 12 is designated as 0, and operand 14 exists only when bit 0 of operand 12 is designated as 0.

Fig. 2 shows an example of the configuration pattern below the header of the message by this command.

As an application example of this command, as in the conventional example, in FIG. 5, the two systems connected by the gateway 55 are both home bus systems, the terminal a56 is a videophone composed of a TV and a telephone, and the terminal A53 is Consider the case of that controller. Using the command of the present invention,
Since it is possible to specify the sub device of the video phone (terminal a56) from the controller (terminal A53), the address of the video phone (terminal a56) is the device address 41 of the video phone and its sub device as shown in FIG. Device address TV42, phone 4
Composed of 3 and. Therefore, the controller (terminal A53)
If you want to set both the TV and telephone timers of the videophone (terminal a56) at the same time, the controller (terminal A53) specifies the device address 42 of the videophone as DA 'as shown in FIG. Subdevice TV 42 and phone 43
A request message A having a control command for sending is sent to the gateway 55 (31), and the gateway 55 sends a request message a specifying the address of the controller (terminal A53) as SA 'to the videophone (terminal a56) (32). ). The videophone (terminal a56) that received the request message a sets the timers for the TV and the phone, and then sends the response message a specifying the address of the controller (terminal A53) as DA 'to the gateway 55 (33). , The gateway 55 uses SA ′ as a videophone (terminal a5
The response message A specifying the address in 6) is sent to the controller (terminal A53).

As described above, according to the present embodiment, by introducing the sub-device address designation command into the home bus system, it is possible to change the system from the home bus to another system with a smaller communication sequence without having a device address for each sub-device. It becomes possible to control the sub-device of the device connected to.

EFFECTS OF THE INVENTION As is apparent from the above description, the present invention provides a system in which a plurality of terminals are coupled by a transmission line and communicate with each other.
A command for designating a subdevice address of a terminal on another system connected by the connection device from a subdevice address of one terminal on a system in a communication network configured by connecting a plurality of connection devices By providing the sub device, it is possible to specify a sub device on the system that does not share the transmission path connected by the connection device, and a device having a sub device does not need to have an address related to the link layer for each sub device. The effect of increasing the total number of connected devices in the system to which the device with the sub device is connected, the effect of improving the expandability of the device with the sub device, the effect of improving the immediacy of the control of the sub device, the traffic of the transmission path Effect and decrease of communication specifications of lower layers. Building Applications having such an effect can be achieved.

[Brief description of drawings]

FIG. 1 is a block diagram of an example of a sub device designation command according to the present invention, FIG. 2 is an explanatory diagram showing a configuration example below the header of a message using the command shown in FIG. 1, and FIG. Explanatory diagram showing a communication sequence in the embodiment of the
FIG. 1 is a diagram showing the address configuration of a videophone in the 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, FIG. 6 is a message block diagram of a home bus system in the conventional example of the present invention, and FIG. 7 shows a communication sequence in the conventional example of the present invention. FIG. 8 is an address configuration diagram of a videophone in the conventional example of the present invention. 11 ... Sub device address specification command operation code, 12 ... Sub device address specification command operands 1, 13 ... Sub device address specification command operands 2, 14 ... Sub device address specification command operands 3, 31 ... … Request message, 32 …… Request message, 33 …… Response message, 34 …… Response message, 41 …… Videophone address, 42 …… Videophone subdevice TV subdevice address, 43 …… Videophone address Sub device Telephone sub device address, 51 ... Transmission path, 52 ... Transmission path, 53 ...
… Terminal A, 54 …… Terminal B, 55 …… Gateway, 56 ……
Terminal a, 57 ... Terminal b, 71 ... Request message, 72 ... Request message, 73 ... Response message, 74 ... Response message, 75 ... Request message, 76 ... Request message, 77 ... Response message , 78 …… Response message, 82 …… TV address, 83 …… Telephone address.

Claims (2)

[Claims] 1. In a communication network constituted by connecting a plurality of systems in which a plurality of terminals are connected by a transmission line and communicate with each other by a connecting device, the address of each terminal is one unique address related to a link layer ( Device address) and a plurality of functional addresses (subdevice addresses) that define a layer higher than the link layer existing under the device address, each subdevice address of a terminal on a system, A communication network control method, wherein a command for controlling from a device on another system connected by a connection device is provided. 2. A command includes a part indicating a command type, a part for designating a subdevice address of a device on a transmission source bus, a part for designating a subdevice address of a device on a reception source bus, and the both subdevices. The communication network control method according to claim 1, further comprising a portion for designating presence / absence of address designation.