JPS61281742A - Home bus system - Google Patents

Abstract

PURPOSE:To improve the utilizing efficiency of an information transmission medium by sending only one packet so as to process the information when the packet of the same content is desired to the sent from a home bus controller to plural communication controllers. CONSTITUTION:When a telephone set 14 connected to, e.g., the communication controller 2 hooks off, the home bus controller 1 sends an information packet 2' giving the connection of an information transmission medium and an information packet 3' in the trunk line state to the controller 2 and sends an information packet 4' describing the presence of the other telephone set 14 in the operating state to other controllers 3-5. The address of the controllers 3-5 is described in the packet. The controllers 3-5 receive once the said information packet 4' to check whether the address is coincident with the own address and when they are coincident, the packet is received and processed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a communication control method in a home bus system.

2. Description of the Related Art Conventionally, in a home bus system in which a home bus system control device and a plurality of information devices are connected to one information transmission medium, an information packet with the same content is sent to any plurality of information devices. , the information packet was sent to each information device by changing the destination address of the information packet.

For example, if four telephones are connected to one information transmission medium and the status of these telephones is managed by the home bus system control device, and one telephone requests a central office line call, the seventh Communication as shown in the figure is performed using all information transmission media. 1. When you take the telephone off-hook and make a call to the central office line, the communication control unit (IFU) connected to the telephone
) 1' sends an information packet to the home bus controller 1' indicating that it has off-footed. In the home bus control device, an information packet instructs the communication control device (engineering FU) 2' to connect the information transmission medium and the telephone.
It also connects the central office line and the information transmission medium. After that, the home bus control device sends an information packet ■ that informs the state that the station line is being used by I F U 2'
Information packets ■-1, ■-2 that inform the state that another telephone 1 is using the 5-station line. ■-3 each IFU3
The communication control method was to send to ', 4', and 5'.

Problems to be Solved by the Invention In such conventional communication control methods, information packets with the same content had to be sent to each of a plurality of communication control devices.

The present invention has focused on this problem and aims to provide a communication control method that improves the efficiency of a home bus system using a simple method.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a packet that is processed only at the destination address and any communication control device that targets all the communication control devices connected from the home bus control device. An information packet describing the information is sent onto an information transmission medium, each of the communication control devices once receives the information packet, accepts the information packet based on the contents of the packet, and determines whether or not to process it. It is something.

Operation The present invention uses the method described above to transmit information packets with the same content into one packet as soon as a home bus control device transmits information packets with the same content to any of the communication control devices connected to the home bus system. Since processing can be performed by transmitting only one packet, it is possible to reduce the number of packets transmitted from the home bus control device, and the efficiency of using the information transmission medium of the home bus system is improved.

Embodiment FIG. 2 is a block diagram showing an embodiment of the home bus system of the present invention. Reference numeral 1 denotes a home bus control device that manages the home bus system of this embodiment, and includes a transmitting/receiving unit 12 that sends information packets to the information transmission medium 7 and receives information packets on the information transmission medium T, and a subscriber telephone line. 9 and the information transmission medium 6, a switching circuit 13 that performs connection and disconnection between the telephone line 9 and the information transmission medium 6, and a central office line interface that performs central line transmission to the subscriber telephone line, central line incoming call detection, partner response detection, outgoing/incoming call collision detection, and tone detection. 11 and the control unit 1 that controls them.
It has 0. 2, 3, 4.5 are communication control units (hereinafter referred to as IFU) that transmit and receive information packets to and from the home bus control unit 1 via the information transmission medium 7;
4, 15, 16° 17 are telephones. 8 is a line terminator.

FIG. 3 shows IrO2 and the telephone 14, and IFU
Reference numeral 2 denotes a transmitting/receiving unit 200 that performs processing for transmitting and receiving information packets to and from the home bus control device 1 via the information transmission medium 7.
According to instructions from the home bus control device 1, the telephone 14
a switching circuit 203 that connects and disconnects the information transmission medium 7 and the telephone 14 sent from the home bus control device 1
It consists of a lamp control section 202 which is controlled by an information packet representing the state of the lamp, and a control section 201 which controls the lamp control section 202. Reference numeral 204 denotes a station line status display lamp of the telephone set 14, which is controlled by the output of the lamp control section 202. 3,4
．． 5 is the same as IrO2, 15, 16.
17 is the same as the telephone 14.

In the home bus system having the above-described components, the operation when the telephone 14 goes off-hook and makes a call on the central office line will be described.

First, when the telephone 14 goes off-hook, the IrO2 transmits an information packet (3) to the home bus control device 1 via the information transmission medium 7, notifying that the telephone has gone off-hook, as shown in FIG. The home bus control device 1 transmits an information packet ■ instructing the IrO2 to connect the information transmission medium 6 and the telephone 14, and also connects the central office line 9 and the IFU2.
The information transmission medium 6 that has been instructed to be connected is connected to the information transmission medium 6. Thereafter, the home bus control device 1 transmits an information packet (3) to the IrO 2 to inform the user of the state in which the station line is being used by the home bus control device 1. In addition, an information packet (■) informing that the central office line is being used by another telephone 14 is sent to the other party's address (FU2, IrO2).
, IFU4, and IrO6 as target addresses, and transmits an information packet as shown in FIG. When the control code is 701', part of the header is /F If: /, and the command code is '85', a command packet is sent to notify the state of the station line. When the upper 4 bits of operation code ■ are 'Q', it indicates that the packet is addressed to operation code 2, and when the upper 4 bits of operation code 1 are '1', it indicates that the packet is addressed to other than operation code 2. .

The lower 4 bits of the operation code (■) indicate the state of the central office line; for example, if it is 70', it means that the central office line is in a standby state, waiting to be used. For operation code ■, one or more IFH addresses can be written. Therefore, the command code 9 of the information packet ■ in FIG. 4 and the operation codes ■ and ■ become as shown in FIG. Operation code ``01'' is the address of IFU2.

Next, the operation on the IFU side when receiving this information packet (2) will be explained. The rFU performs operations as shown in FIG. The IFU 2 (1) once receives the information packet from the home path control device 1 (a), (2) checks whether the command code is II B 5 II (b).

Since the command code is II B 6 II, the upper 4 bits of operation code 1 are II □ II or II
Check whether it is I It (C). Since the upper 4 bits of the operation code are It11+, the self address II O
Compare 11I with "01" of operation code ■ (d), (θ). Since they match, it determines that the packet is not one that it should accept and process, and ends the process.

The IFH3 whose address is If 021+ receives the information packet from the Baum path control device a),
Check if the command code is IT 65 If (
b). Since the command code is 786', the upper 4 bits of the operation code ■ are II □ II or II 11
+ Kawo tone bell (C). Since the upper 4 bits of the operation code are 1111+, the 5 self address 702' and the operation L/-scene r-to 2 (D"01") are compared (d), (6).

Since they do not match, the lamp control unit instructs the status display lamp 204 to display the status corresponding to the lower 4 bits '1' of operation code 1, that is, the status where another telephone is using the central office line. 202, and the lamp control unit 202 outputs to the status display lamp (the lamp control pattern, which is the output value of the 0° lamp control unit 202, is as shown in the table. In this case, the lamp lights up.

IFH4 of address '03', at L/S '04'
The same operation as IFH3 is performed for IFH5.

In addition, in the case of a three-way call between telephones 14 and 15 and the central office line, operation code) 1 is set to '03'.

If you send an information packet with operation code 2 as 70102', the upper 4 bits of operation code 1 are II □ II, and only IFH2 with address If 01 II and IFH3 with address 110211 will accept the packet and control the lamp. and the remaining IF
U4.5 does not accept the packet.

(The following is a blank space) Effects of the Invention As described above, according to the present invention, it is possible to extremely easily reduce the number of packets sent onto the information transmission medium, thereby improving the efficiency of using the information transmission medium of the home bus system. I am made to do so.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of an information packet in a home bus system according to an embodiment of the present invention, FIGS. 2 and 3 are block diagrams of the home bus system, and FIG. 4 is a diagram showing a communication sequence in the system. FIG. 5 is a diagram showing the contents of an information packet in one embodiment of the same system, FIG. 6 is a flow chart of the operation of the communication control device of the same system, and FIG. 7 is a diagram showing a communication sequence in a conventional example. 1... Home bus control unit L2, 3, 4, 5...
...Communication control device, 6,7... Information transmission medium, 8... Line terminator, 9... Subscriber telephone line, 10... Control unit, 11... Office line interface, 12... Transmission/reception unit, 13
...exchange circuit, 14.17...telephone. Figure 3 Page 4 Figure 5 Figure 6 Figure 7

Claims (1)

[Claims] a home bus control device; at least three or more information devices connected to one information transmission medium managed by the control device; and a home bus control device that performs processing on the information devices according to the content of an information packet sent from the control device. when the home bus control device transmits information packets to any plurality of communication control devices and wants to perform some processing on the information equipment connected to the communication control device. , the control device transmits one information packet targeted at all the information devices, each of the communication control devices once receives the information packet, and accepts the information packet using its own pre-assigned address. A home bus system is characterized in that it identifies whether or not it should be processed.