JPH036994A - Bus type small scale communication system - 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 Industrial Application The present invention accommodates a plurality of communication terminals connected at multiple points to a signal transmission line in a home, and each communication terminal communicates via a common telecommunication line. It relates to a communication system that performs.

BACKGROUND OF THE INVENTION FIG. 7 shows an example of a conventional bus-type small-scale communication system accommodating public telephone lines. In FIG. 7, 1 is a signal transmission path, and a control channel 1a which is a signal transmission path for control signals in the system, an external communication terminal connected via a telecommunications line 2 of an external communication network 3, and an internal communication terminal in the system. The information channel 1b is a signal transmission path for information communication between communication terminals connected to the signal transmission path 1 at multiple points. Reference numeral 4 denotes a communication network termination means, which is connected to an external communication network 3 via the telecommunication line 2. The incoming call detection unit 42 detects an incoming signal (16Hz) from the telecommunications line 2.
When the intermittent signal (intermittent signal) is detected and sent to the main control unit 41, the main control unit 41 notifies the communication terminal by a control command via the control channel 1a by the communication control unit 43. Reference numeral 44 denotes a switching circuit unit which connects the information channel 1b and the telecommunication line 2 in response to an incoming call response from the communication terminal that has received the notification, and connects the communication terminal connected to the signal transmission path 1 and the communication terminal of the external communication network 3. Establish information transmission channels. Further, 45 is a transmission control section, which sends out a selection signal (dial signal) to the external communication network 3. Reference numeral 5 denotes a main device, which is a main control unit 512 that manages the use of the information channel 1b of the signal transmission path by communication terminals in the system and the attributes of communication terminals, and a communication unit that sends and receives commands via the control channel 1a. It is composed of a control section 53.

FIG. 8 shows an example of the internal processing structure of a main control unit CPU of a communication network termination means in a conventional bus-type small-scale communication system. In FIG. 8, 102a is a communication processing unit, and communication control process 1 performs control channel communication of a signal transmission path.
02a-1, a communication buffer 102a-2 consisting of a transmission buffer O reception buffer. 102b is a state schedule unit, which includes a message analysis process 102b-1 that extracts necessary command and operand information from the control channel message received by the communication control process 102a-1 and stored in the reception buffer of 102a-2; Whether the command and operand can be accepted (processed) in the current state of the state transition of the communication network termination means 102
an external command analysis process 102b-2 that performs analysis;
Processing tasks 102cm11 of line switching processing and network control processing of the state processing unit 102c. An external command status processing task activation process 102b-3 that performs activation processing using an external command of 102cm12, and a status processing unit 102c.
The internal command state processing task activation process io2b-e is configured to perform activation processing using an internal command issued by the internal command. In the state control unit 102c,
It is possible for each processing task to transmit commands on the signal transmission path by writing a message to the transmission buffer of the communication buffer 102a-2 as necessary, and also to write necessary information to the internal command buffer 102-7. By setting the command issue flag I CMP to on (=1), you can switch to a different status processing task (for example, from the circuit switching processing task 102cm11 to the network control processing task 102).
cm12) command can be issued. Internal command issue flag I CMP is the schedule processing unit 10
2b-5, the external command state processing task launch process 102b-3 according to a predetermined priority order.
Alternatively, an internal command state handling task activation process is activated.

Problems to be Solved by the Invention (1) In the conventional bus-type small-scale communication system with the above configuration, a call is received from a telecommunications line when a plurality of communication terminals capable of receiving calls are connected to the signal transmission path. In this case, it is not possible to determine which communication terminal in the system the detected incoming call should be given to, so the incoming call notification requires the following:
- A method was adopted in which the response of the communication terminal that responded first using a command by simultaneous broadcasting was accepted by the communication network terminal equipment and the incoming call was given. In this case, for example, a fax machine connected to the same system that is in automatic call receiving mode may answer an incoming call from an external telephone while you are away. Failures such as mismatched connections may occur. The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide an incoming call from a communication device of an external communication network to an appropriate communication terminal within the system in a small-scale communication system using multipoint connections. It is something to do.

(2) In the main control unit of the communication network termination means having the above-mentioned CPU internal processing configuration, the status processing task activation process for external commands and the status processing task activation process for internal commands were separately provided. Therefore, the startup scheduling of each startup process had to be performed by means such as flag control. The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to make it possible to centrally process both state processing task activation processes for external commands and internal commands, and to simplify and improve the efficiency of schedule processing. It is something.

Means for Solving the Problems (1) In order to solve the above-mentioned problems, the present invention provides a receiving terminal identification means, and a communication path closing unit included in the receiving terminal identification means recognizes an incoming call from an external communication terminal. The terminal temporarily responds to the call, identifies the called terminal identification signal defined by a predetermined frequency signal sent from an external communication terminal by the called terminal identification unit, and uses the call notification control unit to identify the called terminal This method provides information indicating to which communication terminal within the system the incoming call is directed.

(2) In order to solve the above problems, the present invention provides a command buffer that can commonly store both commands received from a signal transmission path and internal commands issued by a state processing task, and also provides a command buffer that can commonly store commands received from a signal transmission path and internal commands issued by a state processing task. A cloak analysis process is provided to commonly analyze and process internal commands.

Effect (1) In a system in which a plurality of communication terminals that can receive calls are connected to a signal transmission path, by using the above-described means of the present invention, incoming calls from a telecommunications line can be sent from a calling terminal. Detecting a predefined identification signal, identifying and determining the type of communication terminal to receive the call using a communication network terminal device,
According to the result, it becomes possible to give an incoming call to a communication terminal of the same type as the originating terminal in the system, and it becomes possible to prevent a discrepancy between the originating terminal and the terminal that responded to the incoming call.

(2) By centrally performing internal command communication between state processing tasks within the CPU and processing of external commands via the control channel in the same process, it becomes possible to simplify the CPU internal processing process. .

Embodiment FIG. 1 shows the configuration of an embodiment of the bus-type small-scale communication system of the present invention. In FIG. 1, 1 is a signal transmission path, and a control channel 1a, which is a signal transmission path for control signals in the system, and an external communication terminal connected via a telecommunications line 2 of an external communication network 3, and an internal system signal transmission path 1
The system is comprised of an information channel 1b which is a signal transmission path for information communication between communication terminals connected to each other or between communication terminals within the system. Reference numeral 6 denotes a called terminal identification device (called called terminal identification means), which closes a communication path to form a loop when there is an incoming call from a communication terminal of the external communication network 3 by means of a communication path closing unit 61. Answer an incoming call (tentative call). Temporary subscriber, external communication network 3
The tone signal or PB double signal of a predetermined frequency sent from the originating communication terminal of Means) Notify 4. When the communication network termination device 4 receives the information from the called terminal identification device 6 in the main control unit 41, it forms an incoming notification command to be transmitted on the control channel 1a, adds information indicating the type of called party terminal, and sends the information to the communication control unit. 43 to notify communication terminals within the system. If the communication terminal in the system corresponds to the terminal type information added to the incoming call notification command, it sends an incoming call response command to the communication network terminal device 4, and the main control device (main control means) 5 uses the information channel. acquire rights and connect information signal channels. The communication network termination device 4 also performs exchange connection between the communication path and the information channel in the exchange circuit section 44, and transmits information between the communication terminal that responded to the incoming call within the system and the originating communication terminal of the external communication network 3. Establish a route.

FIG. 2 shows an example of a called terminal identification signal used to identify a called terminal in the bus-type small-scale communication system of the present invention and a terminal corresponding to each identification signal. The PB dial signal includes JUST-PCC, which can be identified by C8T and CNG, respectively.
It is also possible to reassign the Puffin communication terminal and G3 fax.

FIG. 3 shows the configuration of an embodiment in which the communication network termination means and the receiving terminal identification means share the same communication control unit and are connected to the signal transmission path in the bus-type small-scale communication system of the present invention. show. In FIG. 3, the main and sub-gJ device (main control means) 5 is the same as that shown in FIG. 1, so a description thereof will be omitted. External communication network 3 identified by receiving terminal identification means 76
The type of the calling side communication terminal is sent to the communication network terminating means 74, and the main control unit 741 forms the message in a predetermined message format, and also adds information indicating the type of the called terminal to the incoming call notification command. , is sent to the control channel 1b by the communication control unit 743. The subsequent steps are the same as those described in FIG. 1, and will therefore be omitted. In FIG. 3, the incoming call notifying means of the incoming terminal identifying means 76 is included in the main control section of the communication network terminating means 74, so a description of the exchange of information between them will be omitted.

FIG. 4 shows one implementation in the bus-type small-scale communication system of the present invention in which the communication network termination means, the main control means, and the incoming terminal identification means share the same communication control unit and are connected to a signal transmission path. An example configuration is shown.

The type of the calling side communication terminal of the external communication network 3 identified by the called terminal identifying means 86 is sent to the communication network terminating means 84, where it is formed into a predetermined message format by the main control section 851, and is sent to the called terminal. Information indicating the type of call is added to the incoming call notification command, and the communication control unit 853 sends the command to the control channel 1b. If the communication terminal in the system corresponds to the terminal type information added to the incoming call notification command, it sends an incoming call response command to the communication network terminal device (main device) 8, and receives the right to use the information channel from the main control means 85. and connect the information signal channel. Further, the communication network termination means 84 also performs exchange connection between the communication path and the information channel in the exchange circuit section 844, and transmits information between the communication terminal that responded to the incoming call within the system and the originating communication terminal of the external communication network 3. Establish a route. In FIG. 4, the incoming call notification means of the incoming terminal identification means 86 and the main control section of the communication network termination means 84 are included in the main control section of the main control means 85, so the explanation regarding the exchange of information between them will be Omitted.

FIG. 5 shows the configuration of an embodiment in which the communication network termination means and the main control means share the same communication control unit and are connected to a signal transmission path in the bus-type small-scale communication system of the present invention. . The incoming terminal identification device (incoming terminal identification means) 6 is a first
Since it is the same as that shown in the figure, the explanation will be omitted.

FIG. 6 shows an example of the internal processing structure of the CPU of the main control section of the communication network terminal stage in the bus-type small-scale communication system of the present invention. In FIG. 6, 101a is a communication processing unit,
It is composed of a communication control process 102a-1 that performs control channel communication of a signal transmission path, and a communication buffer 101a-2 that is a transmission buffer and a reception buffer. 101b is a state schedule section, which includes a message analysis process 101b-1 that extracts necessary command and operand information from the control channel message received by the communication control process 101a-1 and stored in the reception buffer of 101a-2; A command analysis process 10lb-2 that analyzes whether commands and operands can be accepted (processed) in the current state of the state transition of the communication network termination means 101, and line switching processing and network control processing of the state processing unit 101c. The state processing task activation process 101b-3 performs activation processing according to commands of the processing tasks 101cm11 and 101cm12. In the state control unit 101c, each processing task can transmit commands on the signal transmission path by writing a message to the transmission buffer of the communication buffer 101a-2 as necessary, and also transmit the commands necessary for the command buffer 101-7. By writing information, commands can be issued to different status processing tasks (for example, from circuit switching processing task 101cm11 to network control processing task 101cm12).

Effects of the Invention The bus-type small-scale communication system of the present invention provides the following effects.

(1) When communicating by connecting communication terminals such as PC communication terminals (JUST-PC), G3 fax machines, and other telephones that comply with CCITT Recommendation V and 27ter to the same HBS, external public telephone lines When an incoming call is received from a communication terminal connected to the It becomes possible to give

(2) Even when the originating terminal is a communication terminal such as a telephone that does not transmit signals of a specific frequency, and a plurality of communication terminals of the same type are connected to the system, the PB of the communication network termination device of the present invention By using the signal demodulation function to receive a terminating terminal identification signal based on a PB multiplied signal sent from a calling terminal, it becomes possible to give a terminating call to a specific communication terminal.

(3) The internal processing structure of the CPU can be simplified by analyzing internal commands and external commands in a common process. Further, there is no need to control the processing priority of external commands and internal commands through complicated flag control, and it is sufficient to process the commands in the order in which they are written in the command buffer.

(4) Command issuance processing in the state processing task,
This allows internal commands and external commands to be executed in common, making it possible to reduce the software size.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the bus-type small-scale communication system of the present invention, and FIG. 2 shows the receiving terminal identification signals and terminals corresponding to each identification signal for identification in the bus-type small-scale communication system of the present invention. FIG. 3 is a diagram showing an example of the combination of , when the communication network termination means and the receiving terminal identification means share the same communication control unit and are connected to the signal transmission path in the bus-type small-scale communication system of the present invention. FIG. 4 is a diagram showing the configuration of an embodiment of the present invention, in which a communication network termination means, a main control means, and a called terminal identification means share the same communication control unit to transmit signals in the bus-type small-scale communication system of the present invention. FIG. 5 is a diagram showing the configuration of an embodiment when connected to a bus-type small-scale communication system of the present invention, in which the communication network termination means and the main control means share the same communication control unit and transmit signals. FIG. 6 is a diagram showing the configuration of an embodiment when connected to a transmission path, and FIG.
A diagram showing an example of the internal processing structure of U. Fig. 7 is a diagram showing an example of the configuration of a conventional bus-type small-scale communication system accommodating a public telephone line. Fig. 8 is a diagram showing an example of the configuration of a conventional bus-type small-scale communication system. FIG. 3 is a diagram showing an example of an internal processing structure of a main control unit CPU of a network termination means. 1# Fist/signal transmission line, IAE Φ control channel lb-・
φ information channel, 2-... telecommunication line, 3... external communication network, 4.74, 84... communication network termination means, 44,
744,844,944φ...Replacement circuit section, 6,76,
seφ-・Receiving terminal identification means, 61,761.881・
- φ communication path closing unit, 62,762.862... Incoming call terminal identification unit, 101a... Communication processing unit, 101b--
Status schedule section, 101b-1@...Message analysis process, 101b-2...Command analysis process, 10
1b-3...State processing task activation process, 101b
-4...Command buffer 101b-31, 101b
-32,101b-33 Urn φ/Status management table, 10
1c.--Status processing unit.

Claims (1)

[Scope of Claims] (1) A signal transmission path connected to an external communication network via one or more telecommunications lines and having a control channel and one or more information channels; A plurality of communication terminals that are point-connected and perform information communication via a common telecommunications line, a switching circuit unit that performs circuit switching between the information channel and the telecommunications line, and a transmission control unit that performs transmission to the external communication network. a communication network terminating means connected to the signal transmission path; a bus-type small-scale communication system comprising main control means for managing the use of the information channel by the communication terminal and managing the attributes of the communication terminal; a communication path closing section that performs communication path closure; a called terminal identification section that detects a predetermined called terminal identification signal sent from the caller communication terminal via the telecommunications line after the communication path is closed; A bus-type small-scale device characterized by comprising a receiving terminal identifying means having a receiving notification control unit that notifies a connected device in a predetermined manner that a call has been received to the communication terminal based on the result. Communications system. (2) The communication network terminating means and the receiving terminal identification means share a communication control unit that performs control command communication with other devices connected to the signal transmission path via the control channel of the signal transmission path. Detects incoming calls from external communication networks, closes communication channels,
2. The bus-type small-scale device according to claim 1, wherein the incoming terminal identification signal is detected, and the communication control unit notifies the communication terminal connected to the signal transmission path of the identification result by a command. Communications system. (3) A communication control unit in which the communication network termination means, the receiving terminal identification means, and the main control means communicate control commands with other devices connected to the signal transmission path via the control channel of the signal transmission path. In response to an incoming call from an external communication network, the incoming terminal identification means detects the call, closes the communication path, and detects the incoming terminal identification signal, and based on the identification results, the communication network termination means determines whether the incoming call is addressed to the communication terminal. A command is formed to notify that there has been an incoming call, and the communication control section sends it onto the control channel, and upon receiving a command indicating that there has been a response from the communication terminal on the signal transmission path, the communication terminal The information channel of the signal transmission path and the telecommunication line of the external communication network are exchanged and connected by a predetermined line exchange procedure between the communication network terminating means and the main control means. A bus-type small-scale communication system as described in Scope 1. (4) The communication network termination means and the main control means share a communication control section for communicating control commands with other devices connected to the signal transmission path via the control channel of the signal transmission path. , upon receiving the predetermined call notification information sent from the receiving terminal identification means based on the result of detecting the incoming call, closing the communication path, detecting the receiving terminal identification signal, and identifying the incoming call from the external communication network, the above-mentioned A communication network terminating means forms a command to notify that a call has been received to the communication terminal, and the communication control unit sends it onto the control channel to notify that a response has been received from the communication terminal on the signal transmission path. Upon receiving a command indicated by the command, the information channel of the signal transmission path is exchanged with the telecommunication line of the external communication network by a predetermined line exchange procedure between the communication terminal, the communication network terminating means, and the main control means. A bus-type small-scale communication system according to claim 1, characterized in that the bus-type small-scale communication system performs a connection. (5) A communication processing unit that includes a communication control process and a communication buffer and sends and receives messages via a control channel; and a communication processing unit that analyzes the messages received by the communication processing unit, extracts processable commands, and stores them in the command buffer. A message analysis process to store a message, a command analysis process to analyze whether the command stored in the command buffer can be accepted in the current state of the terminal state transition, and a plurality of message analysis processes based on the results analyzed by the command analysis process. a state schedule section comprising a state processing task activation process that selects and starts a corresponding processing task from a processing task group; and a state storing information for each state of the corresponding processing task group started from the state schedule section. Claim 1, characterized in that it comprises a state processing unit consisting of a plurality of processing tasks that performs a process determined based on a management table.
Communication network termination means in the bus-type small-scale communication system described in Section 1. (8) The state processing unit has a plurality of processing task groups that follow independent state transitions, and one of the processing task groups has a predetermined internal function for the purpose of starting one of the processing tasks of the other processing task group. The command and information modifying the internal command are stored in a command buffer in a format equivalent to the external command of the signal transmission path received by the communication processing unit and extracted by the message analysis process of the status schedule unit, and the status schedule is 6. The communication network terminating means according to claim 5, wherein the external command is processed in common with the external command in a command analysis process and a status processing task activation process. (7) A communication processing unit that includes a communication control process and a communication buffer and sends and receives messages via a control channel, and a command buffer that analyzes the messages received by the communication processing unit and extracts processable commands. A message analysis process to store the message in the command buffer, a command analysis process to analyze whether the command stored in the command buffer can be accepted in the current state of the terminal's state transition, and a plurality of messages based on the results analyzed by the command analysis process. a state schedule unit comprising a state processing task activation process that selects and activates a corresponding processing task from among the processing task group; and information for each state of the corresponding processing task group activated from the state schedule unit is stored. 2. The main control means in a bus-type small-scale communication system according to claim 1, further comprising a state processing section comprising a plurality of processing tasks that perform predetermined processing based on a state management table. (8) The state processing unit has a plurality of processing task groups that follow independent state transitions, and one of the processing task groups has a predetermined internal function for the purpose of starting one of the processing tasks of the other processing task group. The command and information modifying the internal command are stored in a command buffer in a format equivalent to the external command of the signal transmission path received by the communication processing unit and extracted by the message analysis process of the status schedule unit, and the status schedule is 8. The main control means according to claim 7, wherein processing is performed in common with the external command in a command analysis process and a state processing task activation process of the external command. (9) A communication processing unit that includes a communication control process and a communication buffer and sends and receives messages via the control channel; and a communication processing unit that analyzes the messages received by the communication processing unit, extracts processable commands, and stores them in the command buffer. A message analysis process to store a message, a command analysis process to analyze whether the command stored in the command buffer can be accepted in the current state of the terminal state transition, and a plurality of message analysis processes based on the results analyzed by the command analysis process. a state schedule section comprising a state processing task activation process that selects and starts a corresponding processing task from a processing task group; and a state storing information for each state of the corresponding processing task group started from the state schedule section. Claim 1, characterized in that it comprises a state processing unit consisting of a plurality of processing tasks that performs a process determined based on a management table.
Incoming terminal identification means in the bus-type small-scale communication system described in . (10) The state processing unit has a plurality of processing task groups that follow independent state transitions, and one of the processing task groups is for the purpose of activating one of the processing tasks of the other processing task group,
A predetermined internal command and information modifying the internal command are stored in a command buffer in a format equivalent to the external command of the signal transmission path received by the communication processing unit and extracted by the message analysis process of the status schedule unit. death,
10. The incoming terminal identification means according to claim 9, wherein processing is performed in common with the external command in the command analysis process and the state processing task activation process of the state scheduler.