JPH0752980B2 - Home exchange control type home bus control device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for controlling a plurality of lines in a home network system (home bus).

2. Description of the Related Art As a home bus control device for performing conventional multiple line selection control and telephone line office line transmission control and / or office line reception control, the configuration of main controller 69 in the system configuration shown in FIG. 5 is often used. Was there. That is, the main control unit of FIG. 5 has two CPU sections, a station line control CPU section 61 for controlling the station line and a main control CPU section 64 for processing control signals transmitted and received via the control signal line 31. Each CPU unit is provided with the processing shown in FIG. The ROM 62 and RAM 63 are the program storage unit and the CPU work memory unit of the station line control CPU unit 61, and the ROM 65 and RAM 66 are the program storage unit and the CPU work memory unit of the main control CPU unit 64. Main control CPU section
When 64 receives the control signal transmitted from the telephone terminals 26, 27, etc. via the control signal line 31 and the transceiver 67, the control signal reception processing unit 57 of the main control CPU internal processing unit 45 shown in FIG. The control signal receiving buffer 59 is activated and the received control signal is stored in the control signal receiving buffer 59, the control signal processing unit 56 refers to and identifies the control signal, and the command described in the control signal is selected from among predetermined command processing. The method of uniquely performing the corresponding command processing was used. The control signal transmission processing unit 58 is used when it is activated by the control signal processing unit 56 and transmits to the control signal line 31. At this time, if the command processing is the selection signal transmission processing to the telephone line, the main control CPU unit 6
4 communicates with the station line control CPU 61 and the CPU. That is,
Since the timer interrupt processing unit 53 in FIG. 6 refers to the dial buffer 54 at a constant cycle, the control signal processing unit 56 performs selection signal transmission processing and writes the selection signal data to the dial buffer 54, and then the timer interrupt processing unit The timer interrupt processing unit 53 sends the selection signal data to the communication buffer 5 when the communication I / O unit 52
By sending to the communication I / O unit 49 by referring to 1,
After the section 49 temporarily stores the received data in the communication buffer 50, the station line processing unit 46 shown in the station line control CPU internal processing unit 44 activates the selection signal transmission processing unit 47 to call the selection signal from the station line interface 60. The method of sending to the line was used. When the office line interface unit 60 detects a call signal to the telephone line 16, the incoming call detection processing unit 48 shown in FIG.
Is activated and the incoming status section is sent via the communication I / O section 49, 52.
Write the incoming call status to 55. The control signal processing section 56 refers to the incoming call status section 55, and if there is an incoming call, activates the control signal transmission processing section 58 and sends a control signal for notifying the incoming call to the control signal line 31 of FIG. Note that most of the constituent elements are common to the embodiment of the present invention, and therefore description thereof is omitted.

Problems to be Solved by the Invention In such a conventional method, a station line control CP for performing station line control is used.
Main control CPU unit 6 for command processing of control signals received from U unit 61 and control signal line 31 and control of switching circuit 68
Since it is composed of two CPU units of 4, the hardware configuration is complicated and the communication overhead time between CPUs is necessarily required. In addition, it is difficult to efficiently perform station line control, switching control, and control signal processing, and the main control CPU unit 64 inquires the station line control unit 61 at regular intervals whether there is an incoming call from the station line or not. It also has the drawback that the control signal processing cannot be expanded flexibly and easily because of certain conditions. Further, when the control signal transmission source address is the telephone terminal 26, 27, the state of the telephone terminal is not stored and managed, and the command processing described in the received control signal is uniquely activated, resulting in an incorrect communication sequence. Command is used, the main control unit 69 has a high probability of malfunctioning, and the cause of reduced reliability is the control signal line.
It has a drawback that it depends on this communication sequence by using the control signal of each information equipment connected to 31.

The present invention has been made in view of the above circumstances, and provides a device that efficiently performs station line control, exchange control, and control signal processing with a simple hardware configuration and that is highly reliable against malfunctions. .

Means for Solving the Problems In order to solve the above problems, the present invention centrally manages the flow of CPU internal processing in order to realize processing of station line control, exchange control and control signals with only one CPU unit. By providing the schedule control section for performing the internal processing, the internal processing is efficiently performed. Further, the reliability is improved by providing a status table for storing and managing the statuses of the telephone terminal and the office line.

With the above-described structure, the present invention allows the schedule control unit that centrally manages only one CPU internal process to perform sequential control signal processing including station line control and exchange control for each of a plurality of predetermined internal processing units. The CPU internal processing is efficiently controlled by arranging and executing it in continuous processing. Further, when performing control signal processing, erroneous control is performed by referring to the corresponding processing target, that is, the state table of the telephone terminal or the office line to judge whether or not the control signal can be received and processed. Signal processing is prevented.

Embodiment 1 FIG. 1 is a diagram showing a configuration of a home bus control device according to an embodiment of the present invention, and FIG. 2 is an inside of a CPU of the home bus control device according to the embodiment of the present invention shown in FIG. It is a figure which shows a processing structure. The present invention is not limited to the configuration of FIG. 1 and the CPU internal processing structure of FIG. The components are shown below.

In FIG. 1, 29 and 30 are information signal lines of balanced type pair cables used for transmission of digital information data and / or extension line calls or station line calls of telephone line 16, and 31 is the information signal lines 29, 30 and telephone lines. 16 is a control signal line of a balanced type pair cable used for transmission of control signals such as exchange control requests and low-speed data, and the information signal lines 29, 30
Each line of the control signal line 31 is terminated by a line terminator 36. 26 and 27 are telephone terminals such as telephones, 34
Is a control line for transmitting key input such as off-hook or on-hook to the iFU23, 24, 32 is an information signal line 29, 30 and an information line connected by an exchange relay of the iFU24, 28 is a communication control function for a personal computer etc. Is an information terminal that
A control line 35 is used for instructing control to the iFU 25, and 35 is an information line connected to the information signal lines 29, 30 and an exchange relay of the iFU 25. 24 and 25 are various information devices and the information signal line 29
A communication control unit (iFU) that connects the information signal line 30 and the control signal line 31 to perform medium access processing and transmission control processing for each transmission medium. Reference numeral 18 is a station line interface for detecting a ringing signal for notifying an incoming call from a station line, detecting an incoming / outgoing collision at the time of transmitting a selection signal to the station line, and forming a DC loop for the station line by a transformer coupling, and 19 is a telephone line. The line 16 and the information signal lines 29, 30 or the office line interface 18 to the telephone line 16
It is an exchange circuit for exchanging connection and disconnection between the looped line 25 and the information signal lines 29, 30 after forming a DC loop in. 20 is a transceiver with a balanced driver and receiver. Reference numeral 21 denotes address information of the communication control unit connected to all information devices of the home network system connected to the control signal line 31 and attributes of the information device, and is executed by the main control CPU unit 17. A read-only memory (ROM) that stores various control signal processing procedure programs to be processed, and a random access memory (RAM) 22 that can be written and read during execution of the various control signal processing procedure programs. Further, the transceiver 20 transmits a control signal including a command for line selection control from the control signal line 31 to the transceiver 20.
Means for interpreting and processing the command of the received control signal after receiving via the control signal line 23 of the exchange circuit 19 and the control signal line of the station line interface 18 according to the interpretation result. 70, control of the ROM 21, reading and writing of the RAM 22, and the control signal line 31 via the transceiver 20 to a specific information device connected to the control signal line 31. It is the main control CPU unit that sends control signals to the.

Next, the processing operation by the above configuration will be shown.

While the system shown in FIG. 1 is operating, the main control CPU unit 1 shown in FIG.
7 performs the internal processing shown in FIG. Telephone terminal 27
IF from the control line 34 that the handset of the off-hook
When the CPU incorporated in the U24 detects it, the iFU24 assembles a pre-defined off-hook command as a transmission packet and then transmits it to the main control unit 15 to the control signal line 31 according to a transmission control method such as the CSMA / CD method. At this time, the control signal having the format shown in FIG. 3 is transmitted to the control signal line 31. Reference numerals 37 and 38 in FIG. 3 are a priority and a source address for controlling the conflict at the time of a collision of control signals such as CSMA / CD, and 39 is a control signal source address,
40 is a control code indicating a command definition division, 41 is a binary counter indicating the data byte length of 42, 42 is a command or data definition field, and 43 is an error control code used for error control of a control signal. is there. That is, when the off-hook command is described in the COMMAND 42 of FIG. 3 and the transmitted control signal is received by the main control CPU unit 17 via the transceiver 20 of the main control device 15 of FIG. 1, the control signal reception process of FIG. The section 13 is activated and the control signal line 31
The control signal received from is temporarily stored in the control signal reception buffer 12 of FIG. 2 and the flag with the reception control signal is turned on. At this time, the schedule processing unit of 1 repeatedly executes the process in accordance with the flow shown in FIG. 4, and therefore branches "YES" in the determination of the presence of the reception control signal and performs the process in the following procedure.

(I) The schedule processing unit refers to the transmission source address of the reception control signal, refers to the terminal address attribute table 11 stored in the ROM 21 of FIG. 1 in advance, and activates the request flag of the state control process to be activated next. Turn on and branch to (ii).

(Ii) Since the control signal transmission source address is the telephone terminal 27, the telephone terminal state control process (hereinafter referred to as process A) 2 in FIG. 2 is started and the processing of the reception control signal command to the telephone terminal 27, that is, the off-hook command. The process of is executed. At this time, the process A2 refers to the telephone terminal state table 6 of FIG. 2 corresponding to the telephone terminal 27, activates the state-specific command interpretation unit corresponding to the TEL2 state NO in the process A2, and activates the state-specific command interpretation unit. If the command accepted in step A2 is permitted, the processing unit of the corresponding command, that is, the off-hook command is selectively activated and executed in process A2. At this time, since the state of the telephone terminal 27 transits, by updating the TEL2 state NO of the telephone terminal state table 6, the state-dependent command interpreter of the next acceptable command can be activated when the command of the next control signal is received. After the setting, the process of the process A2 is skipped and the execution right is given to the schedule processing unit 1, and the process branches to (iii). If the off-hook command is not accepted, the process A2 regards it as a command in an erroneous communication sequence, exits the process A2 without executing the TEL2 status NO, and executes it in the schedule processing unit 1. Grant right and branch to (iii).

(Iii) When the execution right is returned from the telephone terminal status control process 2 to the schedule processing unit, whether or not an internal command to another telephone terminal or an office line is issued during execution of the process A2 is internally addressed to the telephone. Confirm by referring to the command buffer 9 or the internal command buffer 10 addressed to the central office line. If issued, each process A2 and process
At B3, iCMDF used to identify that it is an internal command processing request is turned on (“1”) and the corresponding state control process is started. Since the off-hook command is processed, the internal command in this case is the process A2.
Since it is not issued during execution, it branches to (iV).

(IV) When the schedule processing unit 1 receives a dial command as a control signal, it stores the dial number received as an operand of the dial command in the dial buffer 8 of FIG. Therefore, the schedule processing unit executes the selection signal transmission processing unit 5 in order to send the dial number to the office line if the dial buffer 8 is not empty.
Further, the incoming call detection processing unit 4 is activated and executed in order to see the incoming call status from the central line. At this time, if the station line is receiving an incoming call, the incoming call detection processing unit 4 writes the state of the station line, that is, the state of receiving or talking to the station line state table 7, and at the same time, the station line state control process of FIG. A predefined internal command indicating an incoming call to the station line is stored in the station line addressed internal command buffer 10 in order to notify 3 to the station line. The internal command issued to the station line is processed by the schedule processing unit 1 when the process B3 below the station line state control process is started next, and is connected to the control signal line 31 of FIG. 1 in the process B3. The control signal transmission processing unit 14 shown in FIG. 2 transmits the command as a control signal to the telephone terminals 26 and 27 which notify the telephone line. Telephone terminal 2 that has just received the command for incoming line notification
When the incoming call is answered by off-hook of the handset after 6 and 27 notify the incoming call by ringing an incoming call ringing tone, the following processing is performed as an internal operation of the main control CPU section of FIG. That is, the process A2 accepts off-hook as a command of the control signal, and at the same time, the process A2 identifies that the off-hook command source is an incoming response of an incoming call, and at the same time, the process A2 to the process B3.
The station line status in the station line status table 7 is updated from "incoming call" to "in-call" by issuing an incoming call response internal command.

Similarly, the telephone terminal 26 and the telephone terminal shown in the configuration of FIG.
Even in the case of making an extension call / extension call of 27, the telephone terminal state control process 2 simply relates to the extension call / extension call without changing the control structure centered on the schedule processing unit 11 in FIG. It is possible to easily provide extension calls between telephone terminals using a common information signal line simply by extending the state transition of the telephone terminals.

By installing the schedule control unit as described above, the CPU
By centrally managing the flow of internal processing, internal processing can be performed efficiently.

Effects of the Invention The following effects are brought about by the present invention.

(1) Each of the two telephones / information equipments is a local line call (in the case of the information equipment, the local line is connected to the two pairs of information signal lines shown in FIG. 1 of the present invention by the exchange control by the main control unit. It can be used for both data communication) and extension calls (extension data communication for information devices). That is, it is not necessary to separately assign separate information signal lines to the information signal line for station line communication and the information signal line for extension line communication, and a pair of information signal lines can be arbitrarily shared according to the communication use. .

(2) Medium program memory capacity of 64 to 32 KB or less
One-chip microcomputer (16
A home bus control type home bus control device that uses a one-chip microcomputer (bits or less) can be made compact without requiring the area occupied by the program memory around the microcomputer, and is more expensive than DRAM used for program storage. It is possible to easily provide a desired telephone status control function by simply adding a cheap DRAM memory of at most 1 KB or less without increasing the cost due to the addition of a special SRAM memory. A large-scale home exchange control device can be provided (for example, when providing a state control function for eight telephones, conventionally, a state control process program is provided for each one, and if a 16KB program is required for each, The program capacity of 16KB x 8 units = 128KB was required in total, but if the invention of the present application is adopted, the program capacity remains 16KB. In addition, it is possible to substitute only the memory capacity for storing the status information (about several tens of bytes at most) of a very small capacity telephone.

(3) Since the main control unit independently has the telephone state control process that controls all the operations related to the telephone and the station line state control process that controls all the operations related to the subscribed telephone line, two times from the telephone to the office line and to the telephone. It is possible to control the transmission of the telephone by transmitting the control signal addressed to the telephone only once without transmitting the control signal of.

(4) For a plurality of telephones / information devices on the terminal side, when the main control device and an arbitrary telephone / information device transmit / receive control signals, the present invention is The control signal can be transmitted immediately at a timing without waiting for a fixed time having any cyclic constraint in the control signal line of the present application.

(5) The schedule control means includes a schedule processing unit, a state table for each control target, and an internal command buffer for each destination, so that one state control process for performing one station line side control and one telephone side control are performed. It can be realized with the same configuration as another state control process to be performed. Further, when a plurality of station lines are accommodated and controlled at the same time, a plurality of station line side controls can be easily realized by simply adding the station line state tables individually. At this time, the state control process for controlling the central office side is shared and only one is required. Similarly, when a plurality of telephones are accommodated and controlled at the same time, a plurality of telephones can be easily controlled by simply adding a state table of each telephone. At this time, the state control process for controlling the telephone side is shared and only one is required.

(6) By using the internal command buffer in the schedule control means, it is possible to provide inter-process communication between different processes between the state control process that controls the station side and the state control process that controls the telephone side. . In addition, even if there are three or more state control processes with different control targets, the schedule control method of this application can be easily extended and applied.

(7) In the present invention, only one or a plurality of information signal lines may be used as a signal line for communication. In other words, there is no need to provide separate lines for office calls and extension calls. Therefore,
As a control target only from the perspective of the CPU, it is possible to provide a shared resource that does not depend on the purpose of use, such as a signal line for simple communication.

(8) Provides a low-cost and compact configuration of the hardware of the main control unit that can control the station line for outgoing / incoming calls and the extension / external call for voice / data communication by using only one CPU it can.

(9) A single CPU can centrally manage and control control command processing such as station line control, call control, exchange control, and control signal transmission / reception control, which greatly expands the internal processing of the CPU and also the schedule processing unit. By flexibly adding / deleting / changing the structure of, various CPU processing structures can be realized extremely easily.

(10) Since the control signal command that can be received and processed can be identified for each operation transition state in the telephone terminal state control process and the office line state control process, erroneous processing and execution of the control command can be prevented in advance. It becomes possible to do. Therefore, the reliability of the main control unit can be independently increased without depending on the control signal transmission / reception sequence from the information equipment or telephone connected to the control signal line.

(11) Information that has two or more telephones as a common transmission line without an intervening exchange circuit provided in the main control unit when performing an extension call between telephones that are housed in the main control unit and control state control The extension (one-to-one extension communication, or one-to-N communication (N is an integer of 2 or more)) can be easily realized by commonly connecting the signal lines to multiple points.

(12) In the present invention, by simply connecting a telephone or the like to a bus-type common transmission line by a multipoint connection, an information outlet or the like at one location can be easily used, and a telephone using a 6-core or 8-core modular connector using a metal wire. Connection work is possible.

[Brief description of drawings]

FIG. 1 is a system configuration diagram of a home bus control device in one embodiment of the present invention, FIG. 2 is a CPU internal processing structure diagram in the home bus control device, and FIG. 3 is a control signal format in the home bus control device. FIG. 4 is a flow chart of the operation of the home bus control device, and FIG. 5 is a system configuration diagram of the conventional home bus control device.
FIG. 6 is a CPU internal processing structure diagram in the home bus control device. 15 …… Main control unit, 16 …… Telephone line, 17 …… Main control CPU
Department, 18 ... Station line interface, 19 ... Exchange circuit.

Claims (1)

[Claims] 1. A plurality of telephones / information devices, at least one information signal line which is a first common signal transmission line to which the telephones / information devices are connected, and the telephones / information devices are connected to transmit control information. A control signal line that is a second common signal transmission line, and a main control unit that accommodates at least one subscriber telephone line as a transmission line, and the main control unit has its internal processing CPU that does
A control section, and further, a line switching control from a plurality of the telephones / information equipments and a line control for a line request for a line control for the subscriber line are transmitted and received via the control signal line. It has a configuration including a process means and a telephone terminal state control process means for centrally managing the individual operating states of a plurality of the telephones / information equipments via the control signal line, and the independent central line. The state control process means, the telephone terminal state control process means, and the like, and the independent schedule control means for centrally controlling the activation of independent state control process means for each controlled object are provided, and the information signal line is connected to the station. During line calls (for information equipment, during office line data communication), connect to the subscriber telephone line and for extension calls (for information equipment, during extension data communication) , Two different telephones / information devices are connected to the same information line together as an extension communication path, and a source address which is a part of the control information included in a predetermined control signal is used as a key for selection. Schedule control is performed by switching a single state control process means for each terminal group / station line group which is independent independently, and when a plurality of independent state control process means exist simultaneously, independent operation is performed. The schedule control means is configured to provide inter-process communication between the respective state control process means to be controlled by using the internal command buffer provided for each control target in advance, and all telephone / information devices and A common control signal line transmission method for transmitting control signals sent and received by the main control unit
A home bus control type home bus control device using CSMA / CD.