KR930007238B1 - Method of transferring control between processors - Google Patents

Abstract

The method is for easily performing the transferring of control states between processors to easily manage various conditions occurring during control transferring. It is composed of 2 stages; the 1st stage for requesting the outmost processor to transfer control according to the signal for transferring, and the 2nd stage for generating process having the same identification number as that of the process to receive the control and removing the process in stand-by mode.

Description

How to transfer control status between processes by process number inheritance method

1 is a block diagram of a control system of an all-electronic exchanger to which the present invention is applied.

2 is a flow chart of the present invention.

3 is a flowchart illustrating an embodiment of a method for transferring a control state between a general call and a special call of the present invention.

4 is a flowchart showing an embodiment of a method for transferring a control state between a special call and a special call of the present invention.

5 is a flowchart showing an embodiment of a method for transferring a control state between a special call and a general call of the present invention.

* Explanation of symbols for main parts of the drawings

ASIP: Analog Subscriber Interface Processor ASP: Subscriber Switched Processor

ATIP: Analog Trunk Interface Processor DCIP: Digital CEPT 1 Trunk Interface Processor

DTIP: Digital T1 Trunk Interface Processor

GSP: Global Service Processor INP: Internal Network Processor

LSP: Local Service Processor NTP: Number Translation Processor

OMP: Operation and Maintenance Processor SSP: Space Switch Processor

TSP: Time Switch Processor

The present invention relates to an inter-process control state transfer method using a process number inheritance method.

In general, programs written with concurrent programming techniques are easy to understand and easy to develop and maintain. However, conventional electronic exchangers (TDX-1A and TDX-1B) could not use concurrent programming techniques using assembly language, so there was no concurrent process. The TDX-10 (registered trademark) also uses the CHILL language with concurrent programming and is programmed with concurrent programming. However, the call control program of the existing TDX-10 electronic switchgear is controlled by different control processes according to the type of the call, and these processes use a process identification number or another process or ASP required for call control. It also communicates with neighboring processors belonging to using each other's process identification number. However, if a special call is requested during the general call processing, another special call is attempted during the special call, or if the special call is terminated and converted to the general call, the control process must be replaced. However, if a control process is replaced during call processing, the replaced control process generally has a different process identification number than the process before it was replaced. Therefore, all processes (or processors) related to the existing control process should be informed of this fact. Also, in order to smoothly handle various events occurring during the control transfer, a very sophisticated and complicated control transfer process is required.

In addition, the electronic exchange should be freely made up of general calls and various special services. For this purpose, various special services should be available during the general call and should be able to return to the general call after the special service is over.

That is, in the large-capacity TDX-10 electronic switching system composed of several execution modules, each of which is a general call and various special services, it is free to transfer control from the general call control process to the process of controlling various special services. You must come.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object thereof is to provide a method for easily performing the transfer of an interprocess control state.

In order to achieve the above object, the present invention provides an access network processor (INP), a number translation processor (NTP), a subscriber exchange processor (ASP) including an ASC, an operation and maintenance processor (OMP), and the like. Switch Processor (SSP), Time Switch Processor (TSP), Local Service Processor (LSP), Global Service Processor (GSP), Analog Subscriber Interface Processor (ASIP), Analog Trunk Interface Processor (ATIP), Digital T1 Trunk Interface Processor (DTIP) In a method of transferring an inter-process control state of an electronic switch, which includes a peripheral process such as a digital CEPT1 trunk interface processor (DCIP), to configure a control system, When received, the process whose control is to be transferred according to the received signal A first step of requesting an outmost process to transfer control, and a process having the same identification number as the process identification number of the process to which the outermost process of the process to receive control transfers the control state transfer request to and transfers control to; And a second step of creating and simultaneously destroying the waiting process prior to control.

Hereinafter, with reference to the accompanying drawings will be described in detail the present invention.

1 is a configuration diagram of control system hardware required for general call / special call processing of an electronic switching system to which the present invention is applied.

As shown in the figure, the control unit of the electronic switchboard includes an internal connection network processor (hereinafter simply referred to as "INP"), a number translation processor (hereinafter simply referred to as "NTP"), and a subscriber switching processor (Access Switching). Processor: Space Switch Processor (hereinafter simply referred to as "SSP"), such as "ASP" for short, Operation and Maintenance Processor (hereinafter simply referred to as "OMP"). Time Switch Processor (hereinafter simply referred to as "TSP"), Local Service Processor (hereinafter simply referred to as "LSP"), Global Service Processor (hereinafter simply referred to as "GSP"), Analog Analog Subscriber Interface Processor (hereinafter simply referred to as "ASIP"). Analog Trunk Interface Processor (hereinafter simply referred to as "ATIP"), Digital T1 Trunk Interface Processor (hereinafter simply referred to as "ASIP"). DTIP ", and digital processors such as the Digital CEPT 1 Trunk Interface Processor (hereinafter simply referred to as" DCIP ").

OMP is the processor responsible for the maintenance functions. The INP allocates and retrieves the spatial switch channel, the SSP is the processor that controls the spatial switch, and the NTP is the processor responsible for number translation and routing. The TSP controls the time division switch, the LSP controls various signaling devices, and manages the internal communication path in the ASP. The GSP controls the recording guidance device and the conference call device. ASIP is responsible for analog subscriber matching, ATIP is responsible for analog trunk matching, DTIP is for T1 relay matching, and DCIP is for CEPT1 trunk matching.

ASP is in charge of controlling general calls and special services with the help of TSP, ASIP, ATIP, DTIP, DCIP, LSP, GSP, INP, NTP.

A brief description of the operation of the electronic exchange is as follows.

The first step is to initiate a call when the subscriber picks up the phone and the ASIP detects this signal and forwards it to the ASP, or when the incoming line is occupied, the ATIP / DTIP / DCIP detects this signal and forwards it to the ASP. In the second step, the number dialed by the subscriber is sent by the ASSP in the case of the dial pulse type telephone and the LSP in the case of the DTMF telephone. In case of Decimal, ATIP / DTIP / DCIP detects number from incoming line and R2 MFC detects LSP and sends it to ASP. In the third step, the ASP requests a prefix translation to NTP, and the translated result is notified to the ASP. In the fourth step, if the prefix translation result is a call that is received by the local subscriber, the ASP receives the called party number and requests the translation of the called party number to the NTP. The prefix translation result is a call that is received by other subscribers.

In the fifth step, the NTP translates the called party to request an incoming call to an ASP (hereinafter referred to as called ASP) that controls the called party. The sixth step informs that the called ASP can be called by an ASP controlling the calling subscriber (hereinafter referred to as calling ASP) when the called subscriber is in a callable state. In the seventh step, when the originating ASP requests a space switch connection to the INP, the INP allocates a channel of the space switch and the SSP connects the space switch.

In the eighth step, the originating ASP requests the connection of a time switch to the TSP and informs that the switch is connected to the destination ASP. In the ninth step, when the called ASP requests the call signal to be sent to the called ASIP, the called ASIP sends the call signal. The called ASP requests a ring tone connection to the called TSP. In step 10, when the called subscriber responds, the ASIP controlling the called subscriber line (hereinafter referred to as called ASIP) detects this and sends it to the called ASP. In the eleventh step, the called ASP disconnects the ring tone and the call signal and connects the call path. Notify the called party's response to the calling ASP. In step 12, the originating ASP starts charging. In step 13, when the calling subscriber puts down the handset, the ASIP controlling the calling subscriber detects it and informs the ASP. Or when the incoming line is released, ATIP / DTIP / DCIP detects it and sends it to the ASP. In step 14, the calling ASP sends the charging information to the OMP, and informs the called ASP of the disconnection of the calling party. At the same time, if the space switch is requested to be released by INP, the SSP breaks the space switch. Ask the TSP to cut the time division switch. In the fifteenth step, the OMP records the charging information on the magnetic tape. In step 16, the call ends when the called party disconnects. Subsequent steps are performed only for calls that are forwarded to another country as a result of prefix translation.

Step 17, the originating ASP requests routing to NTP. In step 18, the NTP analyzes the route and requests occupancy of the relay line with the destination ASP. In the nineteenth step, the called ASP requests the occupation of the relay line by ATIP / DTIP / DCIP. In step 20, when the called ASP receives the relay line occupancy completion signal through ATIP / DTIP / DCIP, it notifies the calling ASP. Step 21 is the same as Step 7. Step 22 is the same as Step 8. In the twenty-third step, ATIP / DTIP / DCIP transmits a number when the outgoing line signal is a decadic signal, and in the R2 MFC method, the LSP sends a number to the called station. In step 24, the ATIP / DTIP / DCIP detects the called party response signal and sends the received subscriber response signal to the called ASP. In step 25, as in step 12, the originating ASP starts originating. The twenty sixth step informs the ASP that the calling party receiver is put down or the incoming line is released as in the thirteenth step. In step 27, as in step 14, the calling ASP sends the charging information to the OMP, notifies the caller's disconnection to the called ASP, and cuts by requesting the space switch and time division switch release to the INP. In step 28, as in step 15, the OMP records charging information on the magnetic tape.

The first step is to start the process to transfer control (1) in a specific state (2) to receive a particular signal that requires control transfer (3) to the outmost process of the processor to receive control transfer. Request transfer of control (4). Beginning the transfer of control (5). Then, in the second step, when the outermost process of the process to be transferred to the control is idle (6) and receives a request for transferring the control state (7), a process having the same identification number as the process identification number of the process to be transferred is created. (8) Simultaneously destroy the waiting process before control in the first step (9).

3 shows an embodiment in the case of transferring a control state between an analog subscriber control process for controlling a general call and a special call control process.

FIG. 3 (a) shows a case where control is transferred while the child process of the analog subscriber control block is busy. In the busy state (1), when the subscriber requests a special service by hook-flashing (2), the subscriber transfers control to the subscriber service control block (3). Wait for control to be transferred (4).

If there is a call request from a busy subscriber, if a call request is received in the busy state (1) (5), check if call waiting or transfer special service is registered (6). A control transfer request is made to the controlling block (7). If the call transfer function is registered, the control transfer request is made to the block controlling the call transfer function (8). Wait for control to be transferred (9).

FIG. 3 (b) shows a case where control is transferred while the child process of the analog subscriber control block is transmitting a dial tone. When the subscriber requests a special service by dialing * or # (11) while transmitting the dial tone (11), the control transfer is requested to the subscriber service control block (12). Wait for control to be transferred (13).

4 is an embodiment of the transfer of the control state of the processor between the special call and the special call.

FIG. 4 (a) shows a case in which control is transferred while the subprocessor of the subscriber service control block is receiving a special call number. Receiving a number in the state of receiving a special call number (1) (2) checks the type of special service required and whether it is registered (3). If the requested special service is a call transfer service, a control transfer request is made to a block controlling the call transfer function (4). If the requested special service is a call hold service, a control transfer request is made to a block controlling the call hold function (6). Wait for control to be transferred (5).

FIG. 4 (b) shows a case where control is transferred while the subscriber process of the subscriber service control block is transmitting a special call tone. If the subscriber dials the number (8) while sending a special call dial tone (8), the control transfer is requested to the conference call and the three-way call control block (9). The control is expected to be transferred (10).

5 is a flowchart illustrating an embodiment of a method for transferring a control state to a block for controlling a general call in a special call control process.

FIG. 5 shows a case in which the control of the subprocessor of the block controlling the call waiting function is transferred from the call waiting state.

The block controlling the call waiting function requests the transfer of control to the analog subscriber control block (3) and waits for the transfer of the control state when the waiting subscriber in the call waiting call state (1) is hooked on (2).

FIG. 5 (b) shows a case where control is transferred from the call processor busy state of the block controlling the call hold function.

The block controlling the call hold function requests the transfer of control to the analog subscriber control block (7) and waits for the transfer of control state when the waiting subscriber in the call hold busy state (5) is hooked-on (6). 8).

FIG. 5 (c) shows a case in which the control of the child process of the block controlling the call waiting function is transferred from the call waiting participant release state.

The block controlling the call waiting function requests control transfer to the analog subscriber control block when the call waiting function is hook-flashed by the participant who was busy during the call waiting call (9). (11) Start the transfer of the control state (12).

FIG. 5 (d) shows a case in which the control state of the child processor of the block controlling the call holding function is transferred from the call waiting participant release state.

The block controlling the call holding function requests control transfer to the analog subscriber control block when the call waiting function is hook-flashed by the participant who was busy during the call holding call (13). (15) Wait for control state transfer (16).

FIG. 5 (e) shows a case where control is transferred when the child process state of the block controlling the call waiting function is transferred to the call waiting function holder hook-on state.

The block controlling the call waiting function is an analog subscriber when the call waiting function holder responds (18) while the call waiting function holder is hook-on during a call waiting call and a ring tone is being sent to the function holder (17). Request control transfer to the control block (19) and wait for control state transfer (20).

FIG. 5 (f) shows a case where the control is transferred when the child processor state of the block controlling the hold function is transferred to the call hold function holder hook-on state.

The block controlling the call holding function requests control transfer to the analog subscriber control block when the call holding function holder responds (22) while the call holding function holder is hook-on (21) during a call holding call. (23) Wait for control state transfer (24).

FIG. 5 (g) shows a case where the control transfers from the self processor state of the block controlling the call retry function to the call retry response wait state.

The block controlling the call retry function requests the control transfer to the analog subscriber control block (27) when the other subscriber responds (26) while only one subscriber responds (25) during the call retry. Wait (28).

The present invention as described above is applied to a large-capacity electronic switch, such as TDX-10, to transfer the process control for controlling various special services in the processor controlling the general call, and can be freely transferred, the following effects Have

The control of general calls and general calls, special calls and special calls, or special calls and general calls can be easily transferred, making it easier to develop special calls and greatly reducing the amount of programs.

Claims (16)

Connection Network Processor (INP), Number Translation Processor (NTP), Subscriber Switching Processor (ASP) including ASC, Operation and Maintenance Processor (OMP), etc. are the main processor, Space Switch Processor (SSP) and Time Switch Processor ( TSP, Local Service Processor (LSP), Global Service Processor (GSP), Analog Subscriber Interface Processor (ASIP), Analog Trunk Interface Processor (ATIP), Digital T1 Trunk Interface Processor (DTIP), Digital CEPT1 Trunk Interface Processor (DCIP) A method for transferring an inter-process control state of an electronic switching system comprising peripheral processors such as a control system; When a state of a process receives a specific signal requiring control transfer in a specific state, the process to transfer control to the outmost process of the process to which control should be transferred according to the received signal is requested. Step 1, and a second process in which the outermost process of the process to be transferred to receive the control state transfer request and generates a process having the same identification number as the process identification number of the process to which control is to be transferred, and simultaneously destroys the process waiting for control transfer. An inter-process control state transfer method comprising the steps of: 2. The method according to claim 1, wherein the control state is transferred from an analog subscriber control process for controlling a general call to a special call control process. 3. The method of claim 2, wherein the first step in the case where control is transferred while the child process of the analog subscriber control block is busy is to request a special service by hook flashing the subscriber in busy state (1). A first process, a second process of requesting transfer of control to a subscriber service control block (3), and a third process of waiting for control transfer (4). The method of claim 2, wherein the first step of receiving a call request from a subscriber in a call comprises: (6) checking whether a special service is registered when receiving a call request in a busy state (1); And a second process of requesting control transfer to a block for controlling the corresponding function (7, 8) and a third process waiting for control transfer (8). 3. The method of claim 2, wherein the first step in the case where control is transferred while the child process of the analog subscriber control block is transmitting a dial tone, the subscriber dials a special device (*, #) during the dial tone and the transmit tone. A process performed by a first process of requesting special services (11), a second process of requesting control transfer to a subscriber service control block (12), and a third process of waiting for control transfer (13). How to Transfer Live Control Status. 2. The method of claim 1, wherein the control state is transferred from the special call control process to the special call control process. 7. The method of claim 6, wherein the first step in the case where the control of the subscriber service control block transfers from the receiving state of a special call number, requests (2) if the number is received in the state of receiving a special call number (1). (3) a first step of checking the type of special service and whether or not to register the service, a second step of requesting control transfer to a block controlling the corresponding function (4, 6), and a second step of waiting for control transfer (5) Inter-process control state transfer method, characterized in that performed by. 7. The method of claim 6, wherein the first step in the case where the control is transferred from the subscriber service control block in the state of transmitting a special call tone (7) receives the number dialed by the subscriber (7) during the transmission of the special call tone (8). The first process, the second process of requesting transfer of control to a conference call and a three-way call control block (9), and the third process of waiting for control transfer (10). . 2. The method according to claim 1, wherein the control state is transferred from the special call control process to the general call control process. 10. The method of claim 9, wherein the first step in the case where the control of the block controlling the call waiting function is transferred from the call waiting call state is performed by the subscriber who is waiting in the call waiting call state (1). And (2) a first process of requesting transfer of control to an analog subscriber control block (3), and a second process of waiting for control transfer (4). 10. The method of claim 9, wherein the first step in the case where the control of the block controlling the call holding function is transferred from the call holding busy state is performed when the waiting subscriber is hooked up in the call holding busy state (5). And (6) a first process for requesting control transfer to the analog subscriber control block (7) and a second process for waiting for control transfer (8). 10. The method of claim 9, wherein the first step in the case where control is transferred from the call waiting participant release state to the party process state of the block controlling the call waiting function is that the call waiting function holder is hooked in the call waiting participant release state (9). 10. A method of transferring an inter-process control state, characterized in that it is performed by a first process (11) requesting transfer of control to an analog subscriber control block (11) and a second process (12) waiting for a transfer of control state. 10. The method of claim 9, wherein the first step in the case where control is transferred from the call hold participant release state to the child process state of the block controlling the call hold function is that the call wait function holder is hooked in the call hold participant release state (13). A flash process (14) is performed by a first process (15) requesting the transfer to the analog subscriber control block and a second process (16) waiting for the transfer of the control state. 10. The method of claim 9, wherein the first step in the case where the control is transferred from the call waiting function holder hook-on state to the function holder of the block controlling the call waiting function is performed by the call waiting function holder hooking up to the function holder during a call waiting call. When the call waiting function holder responds (18) to the analog subscriber control block (19), and the second process waits for the transfer of the control state (20) when the call waiting function holder responds (18). Inter-process control state transfer method characterized in that performed by. 10. The method of claim 9, wherein the first step in the case where control is transferred from the call hold function holder hook-on state to the child process state of the block controlling the call hold function is that the call hold function holder hook is held in the state 21. The inter-process control state transfer method, characterized in that it is performed by a first process (23) requesting the transfer to the analog subscriber control block (23) and a second process waiting for the transfer of the control state (24) if the function holder responds (22). . 10. The method of claim 9, wherein the first step in the case where control is transferred from the call retry response state to the child process state of the block controlling the call retry function is performed with only one subscriber responding (25) during the call retry attempt. An inter-process control state characterized in that the first process requests (27) transfer of control to the analog subscriber control block (26) when the other subscriber responds (26) and the second process waits for transfer of control state (28). Previous method.