JPH02222337A - Communication control method and communication network connection controller - Google Patents

Abstract

PURPOSE:To reduce the troublesomeness of the constitution of a telegraphic message between communication networks whose communication terminals are different and an analytical processing of a received telegraphic message by converting a terminal address of the other communication network specified in accordance with an address system of one communication network to a terminal address number of a format conforming to an address system in this 'the other communication network'. CONSTITUTION:In plural networks whose address systems are different, a terminal address of the other communication network specified in accordance with an address system of one communication network is converted to a terminal address of a format conforming to an address in the 'the other communication network' concerned, so that communication is executed between terminals of different communication networks. In this case, a necessary conversion rule is provided as destination code conversion processing parts 5a, 5b on, for instance, a gateway control processing part 7 in a communication network connection controller 1, and processed. In such a way, the constitution of a telegraphic message between the communication networks whose communication terminals are different and the troublesomeness of an analytic processing of a received telegraphic message for the control can be reduced.

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention relates to a communication control method for connecting communication networks with different transmission paths and communicating between terminals connected to the respective communication networks, and a communication control method for use in the method. This relates to a communication network connection control device (gateway).

BACKGROUND ART A conventional technique will be explained with reference to FIGS. 6 to 16.

FIG. 6 is a diagram showing an example of a communication network configuration to which the present invention is applied, FIG. 7 is a diagram showing an address system of equipment to which the present invention is applied, and FIG. 8 is a diagram showing a communication system to which the present invention is applied. Home bus system (HBS (EIA)
Basic message structure used in J standard ET-2101))
9 is a diagram showing the basic message structure used in the digital data bus system (D2B), which is one of the communication systems to which the present invention is applied, and FIG. 10 is a diagram showing the basic message structure used in the D2B protocol for controlling the destination of the message. A diagram showing the commands used, Figure 11, shows the device address (
(hereinafter referred to as (DA)) and sub-device address (hereinafter referred to as (DA)) and sub-device address (hereinafter referred to as (DA))
Figure 1 shows the bit format of SDA).
Figure 2 is a diagram showing the bit format of (DA) and (SDA) on D2B, Figure 13 is a diagram showing the specific address of the terminal in the system shown in Figure 6, and Figure 14 is a diagram showing the specific address of the terminal in the system shown in Figure 6.
The figure shows an example of the configuration of a conventional communication network connection control device. Figure 15 is related to the designation of the destination on each network of a message sent from a terminal on one D2B to a terminal on a different 02B using HBS as a relay network. FIG. 16 is a diagram illustrating a conventional concrete message structure related to destination designation on each network of a message sent from a terminal on HBS to a terminal on D2B.

In FIG. 6, communication network <C> 61 c and communication network <A>
81a is D2B, and communication network <B> 61b is HBS
Suppose that

In HBS and D2B, the terminal system for addresses that specify the source and destination of messages (commands) sent and received between each terminal is one (DA) 71 and multiple (SDA) as shown in Figure 7. It has a configuration of 72. The basic format of messages sent and received on HBS under this address system is as shown in Figure 8 (see HBS standard ET-2101P33).Priority code (PR) is used to control contention for acquiring transmission rights. 80 and the source device address code (SA
)81. Code (DA) 82 indicating the device address of the destination party. Control code (CC) 83. used for communication protocol specification etc. Message length code (BC) 84 indicating the length of the message that follows. Message to be transmitted (DATA
)85. Consists of frame check code (FCC) 8B for code check of DATA85 area,
The DATA 85 further has the following components when a command is specified in the CC 83.

Command code (OPC) 86g and operand food (
OPR) 85h, table selector (TS) 85f indicating the command table in which the OPC 85g exists;
Source subdevice address (SSDA) 85d indicating (SDA) at the source terminal, destination subdevice address (D) indicating (SDA) at the receiving terminal
SDA) 85 e.

A source device address on a sub-bus that is combined by a communication network controller and specifies the destination of terminals on different communication networks (
SA") 85b, and the sub-bus destination device address (DA") 85c, and the 5SDA 85d.
, DSDA85e, SA'85b, DA"85c, and HD85a indicating a group of commands.

5A8 Specify the destination on the same transmission path.
1. DA82,5SDA88. SA'8B which specifies the destination of a terminal on a different communication network connected by the DSDA 89 and the communication network connection control device.

DA'87. This is done using an 8-bit code.

Conflict control during communication is performed by the PH 10 and the SA 81.

The basic format of messages sent and received on D2B based on the address system shown in Figure 7 is shown in Figure 9, CD2B standard IEC/T.
C84JUL, 6.1988),
A source device address code (MA) 80 that performs contention control for acquiring the transmission right, a code (SA) θ19 indicating the destination device address, and a control code (CC) 92 used for specifying the communication protocol. Telegram to be transmitted (D
ATA) 83. At this time, the destination for sending and receiving messages in D2B is specified by the MA (master (DA) = source (DA)) that specifies the destination on the same transmission path.
) f31. SA (slave (DA) = receiving destination CDAl) 92 and the three commands (
D2B standard IEC/TC84JUL.

8.198B P, 52) and D2
(DA) on B is specified by a 12-bit code.

Contention control during communication is performed by the MA 90.

The area after the control code CC92 is the D2B command and data area, and Beginot L will be shown later.
2 is set in this area.

FIG. 10 (10-1) shows the configuration of the BeginO command used for exchanging messages between 2Bs that can communicate with multiple communication network connection control devices. Command code 101 al The source device address on the subbus is 101 C+ DA' indicating the destination device address on the sub-bus 101 d, the SA
” 0PR10 indicating the presence or absence of 101C and DA'101d
1b. At this time, SA' 101c, DA'
Both 101d and 101d are 2 bytes long, and the most significant 4 bits are D.
Indicates the value of the gateway number (1 to 8) assigned to the 2B and HBS communication network connection control device itself, and the subsequent 1
The 2 bits are C on D2B shown in Figure 12 (12-1).
D Follow the coding system in A).

Figure 10 (10-2) shows the configuration of the Beginl command used for exchanging messages between D2B and H88 connected by one communication network connection control device, and the command code is 102 aj Source on sub-bus SA'102C indicating the device address, DA'102d indicating the destination device address on the subbus, 5SDA102e indicating the source subdevice address, DSDA102f indicating the destination subdevice address,
Said SA' 101c and DA' 101d,! :5
0PR indicating the presence or absence of SDA102e and DSDA102f
102b. Generally the Begin1 command is 0
This is for communication between 2B and other communication networks, but the 10th
Beginl=lvy shown in figure (10-2) is D2
This shows the configuration for communication between S and H88.
A' 102c, DA' 102d, 5S
DA102e, DSDA102f, 0PR102b are H
S A' 85 al D that composes the BS message
A' 85 c, S S D A 85 d,
Compatible with D S Dλ85e and HD85a, respectively.
The code system also follows the HBS code system shown in FIG.

Begin2=Iv in FIG. 10 (10-3) is D
Command code 103a is for specifying the (SDA) of the terminal on 2B, and 5SDA103c indicates the source subdevice address.

DSDAIO3d indicating the destination subdevice address;
It consists of an 0PR 103b that specifies the presence or absence of the 5SDA 103c and DSDA 103d. 5SDA103c, DSDAl, 03d in Begfn2 are shown in Figure 12 (
It follows the (SDA) coding system on D2B shown in 10-2).

FIG. 11 shows the bit format of the HBS device DA) and [SDA] codes. b.

The area 111a using bl is used for specifying a service group, the area 111b using b1 to b6 is used for specifying a device type, and bl is used for specifying the number of connected devices.

FIG. 12 shows the bit format of the CDA) and [SDA] codes of the D2B device. In the case of [DA],
An area 121c formed by b11 to b8 is used for specifying a service group (DA).

(SDA) In both cases, the area b7 to b3 is used to specify the type of device, and the area b2 to bo is used to specify the number of connected devices. In the case of the HBS shown in FIG. 11, the lower bits have higher priority in transmission conflict processing<, and in the case of D2B, the higher bits have higher priority in transmission conflict processing. Therefore, the setting value in the area 111b for specifying the device type in HBS and the setting value in the area 121b for specifying the device type in D2B are different even if they are for the same device. Assume now that the specific address of each terminal in the configuration shown in FIG. 6 is the value shown in FIG. 13.

The communication network <A> 61a is D2B, and the terminal Aa> 63a on this network has the value 100H (131a) as the device address and the value OOH (132a) as the subdevice address, and the terminal <Ab> 83b has a value of 101H (131a) as a device address and a value of OOH (132a) as a subdevice address.

Communication network <B>E! lb is HBS, the terminal <Ba> 83c on this network has the value of CGH (131c) as the device address and the value of OCH (132c) as the subdevice address, and the terminal <Ba> 83d has the value of CGH (131c) as the device address and the value of OCH (132c) as the device address. It has a value of 4DH (131d) and a value of 4LH (132d) as a subdevice address.

The communication network <c>e t c is D2B, and the terminal <Ca>83e on this network has IC8H as the device address.
value (131e) and 08H as the subdevice address.
The terminal <Bb> 83f has a value of IC9H (131f) as a device address and a value of 08H (132f) as a subdevice address.

The connection control device A32a between the communication network <A> 61a and the communication network <B> Blb sets the value of 0F9H (133a) as the device address on the communication network <A> to one communication network <B>.
The value of 34H (133b) as the device address above
as the gateway identification code, 1 (134a)
have.

The connection control device B82b between the communication network <B>81b and the communication network <c>e i b uses the FCH value (133c) as a device address on the communication network <B>.

Set the value 0F9H (133d) as the device address on the communication network <C> and 8 as the gateway identification code.
(134b).

At this time, the terminal <Ca>83e on the communication network <C>61c
When transmitting a message from (SDA) (132e) to (SDA) (132a) of terminal <Aa> 83a on communication network A>61a, "D2B standard IEC/TC84J
According to UL, 8.1988J, the message format on each communication network is as shown in FIG. Communication network<C>81 c
The message structure above is as shown in (15-1), and MA
The value of 90 is IC8H in D2B notation for terminal <Ca>83e.
(151a), the value of 5A91 is the value of D2B notation on the communication network <C> 81c of the connection control device B62b, which is 0F9.
H (151b), the one that indicates the route information in the DATA area 93 is the Begino command shown in FIG.
The command code value BBH (151c), the upper 4 bits of the 2-byte DA' indicate 1100H (151d) based on the gateway identification code IH of the connection control device A62a and the final destination device address 100H, and further (SDA). Therefore, the Begin2 command is added, and the command code value is BDH (151e).

08H (1
51f), and OOH (151g) as a 1-byte DSDA in D2B format.

The communication network connection control device BEf2b that received this message sets the communication network 1 to D2B and the communication network 2 to HB as shown in FIG.
When S, the received message analysis processing unit 3a for the communication network 1
It recognizes the ginO command and passes the received message to the destination/message format change processing section 4a of the gateway control processing section 7. The destination/message format change processing unit 4a changes the DA' of the received message.
From the information 151d, the value of DA82 of the message on HBS is 34
H (152b) is the MA information 151a of the received message.
SA'818H of B e g i no command from
152d) and the first
The message shown in FIG. 5 (15-2) is transmitted to the other communication network connection control device A132a.

In the communication network connection control device 82b that has received the message of FIG. 15 (15-2), if communication network 1 is D 2 B and communication network 2 is HBS in FIG.
The received message analysis processing section 3b recognizes that the received message is DATA and that the first code is a Begino command code, and passes the received message to the destination/message format change processing section 4b of the gateway control processing section 7. The destination/message format change processing unit 4b changes the value of DA' of the received message to 1100.
SA value 100H of message on D2B from H (152e)
(153b) and BeginO:l? D to D
The information 152e in the A' portion is deleted and the information 152e in FIG.
), and sends the message to the terminal (Aa>83a).

In this way, even if the data passes through different transmission networks, if the final communication network is the same as the communication network of the source terminal,
It is sufficient that the communication network connection control device has the ability to recognize and process the BeginO command.

Here, a specific example will be shown in which a message is sent from a terminal on HBS to a terminal on D2B.

Assume that a message is sent from the terminal <Ba> 83c to the terminal <Aa> 63a. At this time, Fig. 11.

As shown in FIG. 12, [DA] has a different size and bit format, and (SDA) has the same size but a different bit format. Therefore, when sending a message from a terminal on HBS to a terminal on D2B, terminal <Ba>83c cannot construct a message with the message structure shown in Figure 8, and somehow sends the following information. and the first
It is necessary to compose and send the message shown in Figure 6 (16-1).

1) Bit format information of D2B communication partner terminal (DA), (SDA) 2) D2B communication protocol information (Begging, 2 information) From terminal <Ba> 63c to communication network connection control processing device A62
The message to a is H as shown in Figure 1e (1B-1).
It cannot be used as a command on the BS, but data is specified by CC (control code) 83 b1 = 0, and the BC
The following data had to be:

In FIG. 13, the terminal <Ba on the communication network <B> 81b
When sending a message from (SDA) of >63C to [SDA] of terminal <Aa>E33a on communication network <A>81a: [DA)CCH (131c
) of terminal <Ba>63C with (SDA) OCH (13
2c) to 02B address format (7) (:DA)1
(SD) of terminal <Aa>63a with 00H (131a)
A) An example of sending a message to OOH (132a) will be shown.

(SDA) of terminal <Ba> 83c on communication network <B> 81b
) (132c) to the terminal <A on the communication network <A> 81 a
When sending a message to (SDA) (132a) with a > 63a, “D2B standard IEC/TC84JUL,
6.1988J, and “EIAJ HBS Standard
With ET-2101J, the message format on each communication network is
The result is as shown in FIG. The message structure on communication network <B> 61 b is as shown in (18-1), and the value of 5A81 is 4DH (181
a) The value of DA82 is the communication network of connection control device A62a<B
> 34H (181b) DAT on (DA) on 81b side
The BeginO command shown in FIG. 10 indicates the route information in area A 93, and the value of the command code is B.
BHe: 181c), the upper 4 bits of the 2-byte DA' are 1100H (181e) based on the gateway identification code IH of the connection control device A62a and the final destination device address 100H, and further to indicate (SDA). A Begin2 command is added, and the command code value is BDH (161f) and OOH (181g) as a 1-byte DSDA in 02B format. At this time, D
Beginl exists as a command on 2B that indicates 5SDA of the terminal on HBS, but this Beginl
Since it cannot be used at the same time as BeginO, it is not possible to specify (SDA) of the sending terminal <Ba>83c. In the communication network connection control device A62a that received this message, the first
When the communication network 1 shown in Fig. 4 is D2B and the communication network 2 is HBS, the Begin
O command is recognized and the destination of the gateway control processing unit 7 is
The received message is passed to the message format change processing unit 4b. The destination/message format change processing unit 4b calculates the SA91 value 100H(
IE12b) from the SA information 181a of the received message to the SA' ADH (182d) of the Begin1 command.
16 (16) as DATA by CC.
−2) A terminal on the communication network <A>61 a <
Send to Aa>63a.

As mentioned above, in the conventional method, different address systems,
Communication between communication networks according to the above and communication systems had the following problems.

(1) The processing load on the sending and receiving terminals increases.

Information such as the address system of the communication network of the a0 communication partner must be held in the terminal that attempts to communicate with the communication network.

b. At layer 3 or higher level, the protocol processing function of the communication network of the communication partner must be maintained.

(2) Not all information related to the destination of the message can be notified.

Problems to be Solved by the Invention The present invention solves the problem of exchanging messages between different communication networks due to differences in address display in communication networks that are connected by a communication network connection device and communicate with each other, as seen in the above-mentioned conventional example. The object of the present invention is to provide a communication control method that reduces the complexity of composing messages and analyzing received messages between different communication networks of communication terminals that perform communication terminals, and to provide a communication network connection control device used therein. It is.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a system in which a plurality of terminals are connected to the transmission path of each communication network, and the terminals are connected to each other in order to communicate within the same communication network. It is equipped with a communication control processing unit that sends and receives messages consisting of an address specification part, a route information part for communication to other communication networks, and a data part such as control commands and data. A communication control method in which the terminals communicate with each other in a communication network, the terminal address of another communication network specified according to the address system of one communication network being specified according to the address system of the other communication network. This is a communication control method that converts terminal addresses into formats and communicates between terminals on different communication networks.

In addition, in this communication control method, a first communication network conforming to the address system and communication system of the home bus system (HBS) that performs contention control from the lower bits of the source address in order to acquire the transmission right during communication; As an address conversion when communicating between terminals of a second communication network according to the address system and communication system of the digital data bus system (D2B), which performs contention control from the upper bits of the address in order to acquire the transmission right of Swaps the upper and lower bits of the address.

The present invention also provides a communication network connection control device that is connected between the communication networks in order for terminals to communicate with each other, and when transmitting a message from one communication network to another communication network, the communication A destination control processing unit is provided which reconfigures the address specification part and the route information part of the message to be transmitted onto the communication network of the destination, based on the information of the address specification part and the route information part of the message in the network, and The control processing unit includes a code system conversion control processing unit that converts a terminal address of another communication network defined according to the address system of one communication network into a terminal address in a format according to the address system of the other communication network. The code system conversion control processing section converts the code system, reconstructs the message, and communicates the message.

Effect of the present invention With the above-described configuration, when exchanging messages between terminals on different communication networks, there is no need to recognize the communication form on the communication network of the communication partner terminal, and it is possible to exchange messages as if they were the same communication form. The following at and b information, which was necessary for conventional terminals communicating with other communication network terminals, can be processed as if they were communicating on a communication network.
Since it is no longer necessary, it has the effect of reducing the processing load on the terminal.

a1 Information such as the address system of the communication network of the communication partner must be held in the terminal that attempts to communicate with the communication network.

b. At L/Ear level 3 or higher, the protocol processing function of the communication network of the communication partner must be maintained.

It also has the effect of being able to send and receive all information that can be easily exchanged between communication networks that follow the same normal communication system.

Embodiment An embodiment according to the present invention will be described with reference to FIGS. 1 to 13.

FIG. 1 is a diagram showing an example of the configuration of a communication network coupling control device according to the present invention, and FIG.
Figure 2 is a diagram showing the code conversion rules for (SDA) between HBS and D2B according to the present invention, and Figure 4 is a diagram showing the code conversion rules for code conversion between a terminal on D2B and a terminal on HBS according to the present invention. FIG. 5 is a diagram showing specific atosis values when viewed, and is a diagram showing an example of a specific message structure from a terminal on HBS to a terminal on D2B according to the present invention.

The (DA) and (SDA) address formats of the terminals on the HBS are shown in Figure 11. Also, the (D
The address format of A) and (SDA) is shown in Figure 12. From these Figures 11 and 12, we can see that the terminal on HBS and D
The conversion rule shown in FIG. 2 is provided between (DA) and the conversion rule shown in FIG. 3 is provided between (SDA) and (SDA) of the terminal "2B".

In Figure 2, (DA) at HBS is also [D
A is also divided into three parts.

(1) In the part indicating the service group, 'bo in HBS
, bl (21a), but in D2B, b11 to b8 (22
a), (2) The part that specifies the type of device, b2 to b in HBS
e (21b), b7 to 3 (22b) for D2B, (3) b7 (21c) D2 for HBS with the number of connected devices
In B, b2~bo (22c).

However, the size of the part that specifies the type of device is HBS and 0.
It looks the same in 2B, but due to the priority in case of conflict,
The correspondence between each bit is as follows.

b2 of HBS=b7 of D2B. b3 of HBS=b6 of D2B. b4 of HBs = b5 of 2B. HBS b5=D2
B's b4. b5 of HBs = b3 of D2B To ensure mutual consistency, the portion indicating the service loop was fixed for both. The part that specifies the type of device is also fixed. In addition, the number of devices can be specified as 1 in HBS.
Since it is a bit, it can be executed by up to two machines, N001 and NO42. In Figure 3, the sizes are the same;
There is no part indicating a service group in the [5DA) format of 02B. HBS (
SDA]'s bo and bl (31a) are fixed to AVC service, HBS's b7 (31c) and D2B's bO
~b2 (32b) Add correspondence to the part.

It is now compatible with up to 2 devices.

The conversion rules shown in FIGS. 2 and 3 are provided in the gateway control processing section 7 in the communication network connection control device as destination code conversion processing sections 5a and 5b to process them. As a result, in FIG. 6, when the terminal <Ba>f33c on the communication network <B>61b which is HBS controls the terminal <Aa>θ3a on the communication network <A>81a which is D2B, the present invention can be applied. According to the above, (DA) and [ of terminal <Aa>83a on D2B seen from terminal <B a>63c
5DA) can be recognized and processed as having the same address system as the terminal on the HBS, as shown in FIG.

According to the present invention, when looking at the terminal on the communication network <A> 61a from the terminal <Ba> e3c on the communication network <B> Bib shown in FIG. 6, the terminal <Aa> The value of (DA) of 63a is 0LH (41a), the value of (SDA) is OIH (42a), the (DA) of terminal < Ab) E13 b
) value is 81H (4l b).

The value of (SDA) is 0IH (42b), and the value of 3 on the communication network <B> 81b is also set for the connection control device A32a.
It is sufficient to recognize only 4H (43). At this time, the terminal <
The message structure from Ba>E33c to communication network connection control device Aθ2a is as shown in (5-1), and the value of SA81 is 4DH (51a), D in HBS notation of terminal <Ba>63c.
The value of A82 is the communication network <B>θ of the connection control device AE32a.
The value in HBS notation on 1b is 34H (51b), DAT
The route information in area A 85 is shown in the configuration below the HD shown in FIG. DA' is the value 01H (51d) indicating the virtual (DA) of terminal <Aa> 63a on the sub-bus.
The value of 5,5SDA is 41H (51e), and DSDA is the value 01H (51f) indicating the virtual (SDA) of terminal <Aa>θ3a on the sub-bus. The communication network connection control device AEI2a that has received this message composes a message (5-2) according to its own address conversion table when performing normal HBS route processing.

As is clear from FIG. 13, 0 of the terminal <Aa> 83a
The value of (DA) on 2B is 100H (131a),
The value of (SDA) is 0OH (132a). Terminal<B
a>83c transmits this message to the communication network connection control device A62a. The communication network connection control device AE32a that received this message first converts the 8-bit DA' of the message shown in FIG. Format (
DA) and set it as SA (slave address) 52a of the message on D2B. Next, DA51 in the message (1)
Command Begin from d and 5SDA51b to D2B
1 SA' 52b and 5SDA 52c are configured. Next, DSDA51 c to D2 in the message (5-1)
Configure the DSDA 52d for command Begin2 in B. This completes the reconstruction of the address-related portion of the fifth solid sentence (5-2). Communication network connection control device A8.2a
Now, send this message (5-2) to the terminal terminal <Aa on D2B.
> Send to 63a.

As is clear from this embodiment, conventionally, communication terminals that exchange messages between different communication networks differ in communication due to differences in address display in communication networks that are connected by a communication network connection device and communicate with each other. The configuration of terminals becomes easier, such as by reducing the complexity of configuring messages between networks and analyzing received messages for control purposes.

Effects of the Invention According to the present invention, the processing load on the terminals when exchanging messages between terminals on different communication networks is reduced, and system construction and terminal configuration are facilitated. .

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an example of the configuration of a communication network coupling control device according to the present invention, and FIG.
FIG. 3 is a diagram showing code conversion rules for (DA) between HBS and D2B according to the present invention, and FIG. 4 is a diagram showing code conversion rules for (,5DA) between HBS and D2B according to the present invention. A diagram showing a specific address value when viewed by the above terminal, FIG. 5 is a diagram showing an example of a specific message structure from a terminal on HBS to a terminal on D2B according to the present invention, and FIG. A diagram showing an example of a communication network configuration to which the invention is applied,
FIG. 7 is a diagram showing the address system of equipment to which the present invention is applied, FIG. 8 is a diagram showing the basic message structure used in a home bus system, which is one of the communication systems to which the present invention is applied, and FIG. The figure shows the basic message structure used in a digital data bus system, which is one of the communication systems to which the present invention is applied, and FIG. 10 shows the commands used to control the destination of messages in the D2B protocol. ,
Figure 11 is a diagram showing the bit format of the device address and subdevice address on HBS, Figure 12 is a diagram showing the bit format of (DA) and (SDA] on D2B, and Figure 13 is the diagram shown in Figure 6. FIG. 14 is a block diagram showing an example of the configuration of a conventional communication network connection control device.
Figure 15 is a diagram showing the conventional specific message structure related to the destination designation on each network of a message sent from a terminal on one D2B to a terminal on a different D2B using HBS as a relay network, and FIG. 2 is a diagram showing a conventional concrete message structure related to destination designation on each network of a message sent from a terminal to a terminal on D2B. 4a, 4b... Destination change processing section, 5a, 5b... Destination code conversion processing section, 7... Gateway control processing section. Name of agent: Patent attorney Shigetaka Awano Figure a! Determining the number of units of equipment as 1 Determining the number of units of equipment Determining the number of units of equipment Diagram compilation Figure Has frame format Output - Mass 9 - Address SA -- Address OPR - Perrando code Figure 10 Figure 12 Figure (2) D 2 s mounting device [9DA] Pit holder 11 Figure HBs upper equipment (DA) / (So^) Bit holder [9DA] Pit holder Figure 13 Figure 14

Claims (3)

[Claims] (1) A plurality of terminals are connected to the transmission path of each communication network, and each terminal has an address specification part for communicating within the same communication network, and route information for communication to other communication networks. A communication control method in which the terminals communicate with each other in a plurality of communication networks with different address systems, the terminals having a communication control processing unit that transmits and receives messages consisting of data parts such as control commands and data. Converts the terminal address of another communication network specified according to the address system of one communication network to the terminal address in the format according to the address system of the other communication network, and enables communication between terminals of different communication networks. A communication control method characterized by: (2) A home bus system that performs contention control starting from the lower bits of the source address in order to acquire the right to transmit during communication (
A first communication network that follows the address system and communication system of HBS), and a digital data bus system that performs contention control from the upper bits of the address to acquire the right to transmit during communication.
Claim 1, characterized in that the upper bits and lower bits of an address are exchanged as address conversion when communicating between terminals of a second communication network according to the D2B) address system/communication system. Communication control method described. (3) A plurality of terminals are connected to the transmission path of each communication network, and each terminal has an address specification part for communicating within the same communication network, and route information for communication to other communication networks. In a plurality of communication networks with different address systems, the communication network is equipped with a communication control processing unit that transmits and receives messages consisting of data parts such as parts, control commands, and data. When sending a message from one communication network to another, it is a communication network connection control device that is connected between communication networks, and when sending a message from one communication network to another, the information in the address specification part and the information in the route information part of the message in the communication network of the sender. The destination control processing unit is equipped with a destination control processing unit that reconfigures the addressing part and the route information part of the message to be sent to the communication network of the destination, and this destination control processing unit comprising a code system conversion control processing unit that converts a terminal address of the communication network into a terminal address in a format according to the address system of the other communication network,
A communication network connection control device, characterized in that the code system conversion control processing unit converts the code system, reconstructs the message, and communicates the message.