KR100282411B1 - Communication system and signal processing method using the same - Google Patents

Abstract

The present invention relates to a communication system and a signal processing method using the same, and more particularly, to a communication system suitable for processing different types of signals used in an exchange, an exchange period, or a special relay station, and a signal processing method using the same.

Such a communication system includes a frequency tone matching unit performing signaling and switching between relay stations or stations using a frequency tone, and an asynchronous time division control unit which connects and services an arbitrary relay station so that the relay station can be monitored and used when necessary. And allow the asynchronous time division controller subscriber to monitor the usage of the frequency tone matcher and forcibly occupy the line of the frequency tone matcher if necessary.

Description

Communication system and signal processing method using the same

The present invention relates to a communication system and a signal processing method using the same, and more particularly, to a communication system and a signal processing method using the same suitable for processing different types of signals used in the exchange and the exchange period or a special relay station.

Signals are used to send and receive various types of information to control the establishment and related operations of communication links within a network. For example, when making a call, three types of signals are sent to indicate the occurrence of a call, the address (number) of the call and the end of the call.

Since the amount of information for the signal is very small compared to the amount of general communication information, the signal information has been inserted and transmitted in the general communication channel, and transmission facilities and switching systems in the communication network also serve as signaling functions.

The part of the communication network that connects the switching stations is called the inter-station relay network or the main network, and the part that connects the switching station and the subscriber is called the subscriber network.

The transmission line constituting the inter-network is a trunk between the stations, and the transmission path in the subscriber network is a subscriber-loop or a customer-loop.

In addition, an exchange that accepts subscriber lines is called a local exchange (LE) or a transit exchange (TE). Correspondingly, the signal is divided into subscriber line signal and station line signal.

The signal processing system for the exchange is composed of a part for signaling with the relay line between the exchange period or stations, and a part for connecting the relay exchange. There was a problem to configure each board.

An object of the present invention has been made in view of the above-mentioned problems of the prior art, by configuring a system for generating a tone signal and a line control signal used in different types of relay lines in one relay system board tones in case of emergency The present invention provides a communication system and a signal processing method using the same for forcibly canceling or occupying a signal.

According to an aspect of the present invention for achieving the above object, the frequency tone matching unit for performing the switching period, the inter-station relay line and signaling by using the frequency tone, and the arbitrary to be used to monitor and use the relay line between the stations if necessary An asynchronous time division control unit for connecting and serving a relay station may be configured so that the subscriber of the asynchronous time division controller monitors the use state of the frequency tone matching unit and forcibly occupies the line of the frequency tone matching unit if necessary.

Preferably, the asynchronous time division controller comprises a display unit for indicating when the relay line subscriber between the switching periods uses the line, and when the asynchronous time division controller subscriber uses the line.

According to another aspect of the present invention for achieving the above object, storing the information detected in the communication line, extracting the changed information from the stored information to determine the line type, asynchronous time division information In this case, after the offset data of the program to be serviced is obtained, the carrier information of the asynchronous time division information is checked, and if the frequency tone line is determined, the carrier information is checked at the frequency tone.

1 is a block diagram illustrating a signal processing system in a communication system of the present invention.

2 to 3 are flowcharts illustrating a method for processing counter exchange signal detection in the communication system of the present invention.

4 to 5 are flowcharts illustrating a method for processing asynchronous time division signal detection in the communication system of the present invention.

6 is a flowchart showing a signal transmission processing method to a counterpart exchange in the communication system of the present invention.

Explanation of symbols for the main parts of the drawings

1: Frequency tone matching unit 2: Asynchronous time division controller

3: central processing unit 4: bus control unit

5: rom 6: ram

7: signal input / output unit 8: combo unit

9: Oscillator 10: ASIC

11: DC / DC unit 12: filter

13: memory 100: relay system board in the first switch

101: second switch 102: special relay

103: Subscriber Board

Hereinafter, the configuration and operation according to an embodiment of the present invention will be described with reference to the accompanying drawings.

1 is a block diagram of a signal processing system in a communication system of the present invention.

Such a signal processing system in the communication system of the present invention uses the frequency tone in the relay system board (local board) 100 in the first switch, as shown in FIG. A frequency tone matching unit 1 for performing signaling between the switching station (second switch) 101 and the inter-station relay line, and a special relay stand 102 for monitoring the relay line between the stations and making it always available when necessary. Asynchronous Time Division (ATD) control unit 2, which can be serviced by connecting the same, and the call processing portion of the central processing unit (CPU) 3 and the second exchanger 101, Parallel bus controller (Parallel BUS Controller) 4 for exchanging information between boards (medium system board 100, subscriber board 103), and received signals Rx from the exchange 101 or subscriber board 103 Central processing unit (3), ROM (ROM) which analyzes and stores signals 5) and RAM (6), input and output of the ROM (5) and RAM (RAM) 6 and the external device of the relay system board 100 in the relay system board 100 The Signal Input Output Connector (7) in charge and the frequency pass characteristic have a bandwidth of 300 Hz to 3400 Hz, and a codec (coding / decoding) and a filter are simultaneously mounted on one chip. The combo section 8, the system clock which is the overall clock used on the board, the interrupt signal and the reset signal used in the central processing unit 3 are generated and connected via the parallel bus. Oscillator 9 which divides various clock and pulse tones used for message exchange with upper processor (processor of main board (not shown)), and card injection signal (terminal) Status Block (TSB) and Frame Sync of the combo unit 8. Application Specific Intergrated Circuit (ASIC) 10 for making and supplying an Enable signal, a Control Signal (for example, LED: Light Emitting Diode) of the asynchronous time division control unit 2, and the like; It comprises a DC / DC unit 11 for supplying -5V to a board.

In addition, a surge absorber (not shown) is used to remove the surge voltage from the line, and thus, the phone and the system from external lightning and AC power. Line Protection Circuit (not shown) to protect the circuit, a 2 wire to 4 wire conversion device between the line side and the system, which prevents mutual influence between handset signals and from the system side to the telephone. Transformer hybrid circuits (not shown) to prevent outgoing signals from returning to the system side and not affecting, and a balanced circuit (not shown) for impedance matching between the system and the telephone line. It is composed.

The analog audio signal from the line is sampled through a hybrid circuit through a filter, and the analog audio signal passed through the send filter is passed through a comparator (not shown) in the combo unit 8. It is sampled, held and coded through an analog digital converter (not shown) to form a pulse code modulation (PCM) signal.

Such a pulse code modulation signal is time-division multiplexed and transmitted by a time slot stored in a control register.

Then, the switched pulse code modulated signal is transmitted to the trunk line side through the digital / analog converter in the combo unit 8.

The present invention uses a single frequency (Multi Frequency) and multiple frequency tone signaling (Multi Frequency Tone Signaling) and the Loop Control Signal (Loop Control Signal), the signaling type (Singnaling Type) is bi-directional (Bi-Direction), It is a system for efficiently managing channels when it is necessary to provide different signaling protocols.

In each channel mode of the local boards 100 and 103, the mode of the terminal type and the signaling type to be used are determined according to the data produced by the customer of the system, and accordingly the trunk type of the local board Is used to initialize.

Such a signal processing method of the present invention will be described with reference to the accompanying drawings.

2 to 3 are flowcharts showing a counterpart signal detection processing method in the communication system of the present invention.

In the signal processing method of the communication system of the present invention, as shown in FIG. 2, the information detected in the trunk line is detected, stored in a signal interface queue (SIQ), and the information converted from the stored information is stored. Extract. (200)

That is, in order to perform the trunk line signaling protocol between stations, the frequency tone interface module detects signal data transmitted through a common highway and writes it to a data reception signal (DRS) memory. Then, the duration and frequency value of the tone are determined by the terminal type received from the call processor in the local CPU 3.

At this time, by scanning the carrier (carrier) every 8ms in the trunk line to store the carrier in a signal interface queue (hereinafter referred to as SIQ).

The carrier information stored in this SIQ is detected by the base job (?).

The single-frequency or multi-frequency tone trunk or asynchronous time division (ATD) mode is determined according to the terminal type received in the call processing.

According to this determined mode, the offset value of the trunk type is determined in the database (ROM 5).

Then, the carrier information is checked. (203)

Signals (normal trunk seizure) is 1200Hz, trunk port seizure is 1600Hz, dial pulse is 1200Hz, sub answer is 1200Hz, In order to send disconnection (1200 + 1600 Hz, trunk monitoring pulse 1200 or 1600 Hz), the trunk type and the trunk type on the local board depend on the information sent in the PB BUS message from the call. After checking the mode, the timer value and the signal frequency to be transmitted are determined and written to the data transmission signal (DTS) memory to start the tone transmission and register the designated timer.

At this time, if the carrier information is F1 = 1600 Hz, it is checked whether the detected signal is a signal related to the asynchronous time division (ATD) line signal protocol that should be received in the current state, and the timer and the next state obtained from the upper database are updated. (204) Subsequently, the system waits for a predetermined time. (First idle)

That is, it is checked whether the signal is detected by the special relay station 102.

If the carrier information is F2 = 1200 Hz, it is checked whether the detected signal is a signal related to a trunk signal protocol to be received in the current state, and the timer and the next state obtained from the upper database are updated. Idle for a certain period of time (second idle)

That is, it is checked whether the signal is detected by the subscriber board 103 or the second switch 101.

If the carrier information is F1 + F2 = 1600Hz + 1200Hz, it is checked whether the detected signal is a release signal to be received in the current state, and the timer and the next state obtained from the upper database are updated. Wait some time for the line to recover.

That is, it is checked whether or not a disconnection signal.

Finally, when the carrier information is F1 = 0 or F2 = 0, the tone is input and the timer value is checked as a detected signal without being sustained for a predetermined time (200 ms or more).

In other words, it is checked whether the trunk monitoring pulse.

At this time, if the timer value (for example, 200 ms) is larger than the Monitoring Of Network Protocol (MONP) value (for example, 60 to 70 ms) necessary for the line check, the line status check protocol is generated and the MONP is generated. The detection is reported and then updated with the timer and the status obtained from the host database. (208) Next, the line status is monitored and waited for a predetermined time (first monitoring).

However, in other cases (Else) detects that the detected signal is disconnected from the current state, and updates to the timer and the next state obtained from the upper database (209), and maintains the current state for a certain time.

Next, as shown in FIG. 3, the trunk type and offset value (specified in the ROM 5 of FIG. 1) are timed out after a certain time after the first, second idle, recovery, first monitoring, and current state maintenance in FIG. Update the status of the corresponding channel and stop sending signal tones depending on the type of signal to be processed next.

That is, when the frequency tone line times out, the offset data of the program to be serviced is obtained to obtain the current state.

The current state is then checked (301).

As a result of checking the current state (301), if it is the first monitoring state, the state of the line is checked and the monitoring pulse signal sent to the second switch 101 is stopped (314).

Next, the state and timer values are obtained from a database (?) (Exactly where), and the state and timer values are updated (315). Next, a second monitoring is performed.

During the second monitoring, the state of the line is checked and the monitoring pulse signal is sent to the second exchanger (101 in FIG. 1). (308) At this time, the trunk line signal is transmitted as a 1200 Hz signal.

Then, the state and timer values are obtained from a database (?) (Exactly where) (ROM (figure 5 in FIG. 1)), and the state and timer values are updated (309). First monitoring is then performed.

If the current state is checked (301) and the LED is in response, it sends an asynchronous time division LED off signal associated with this line, and then reports the line recovery signal from the counterpart exchange 101 (304).

Next, the next state and timer are obtained from the database, and the state and time are updated (305). Recovery is then performed.

If the recovery state is checked as a result of checking the current state (301), an asynchronous time division LED off signal associated with this line is sent, and the line recovery signal is reported from the second switch 101 (310).

The channel is then idled, and the state and time are cleared (311). Next, the controller waits for a predetermined time in the third idle state.

If the current state is checked 301 and the first idle state is checked, the multi-frequency line condition is checked and the loop occupancy detection is reported from the second switch 101 (306).

Next, obtain the next state and timer from the database, update the state (307), and wait (third wait).

If the current state is checked (301) and the second idle state is checked, the multi-frequency line condition is checked, and the loop occupancy detection is reported from the asynchronous time division of the counterpart exchange 101. (312)

That is, it reports that the line is forcedly occupied by the relay system board 100 in the first switch in the special relay station 102 through the asynchronous time division controller 2.

Next, obtain the next state and timer from the database, issue an LED off signal, update the state (313), and wait (third wait).

If the current state is checked (301) and the first waiting state is reached, the digit counter is incremented and then updated to the next state (303).

In addition, if the current state is checked (301), if it is the second waiting state, the boundary of the detected digit is checked, the detected digit is reported, updated to the next state (302), and then waited. Waiting)

4 to 5 are flowcharts illustrating the asynchronous time division signal detection processing method in the communication system of the present invention.

As shown in FIG. 2, if the line type is checked and an asynchronous time division line signal is obtained, as shown in FIG. 4, offset data of a program to be serviced is obtained, and a current state is obtained.

Subsequently, timers to be serviced on the line and next state data are obtained from a database according to the trunk type.

The carrier information is then checked (402).

As a result of checking the carrier information (403), if disconnection is detected, the disconnection signal is reported and the channel is idle. (403) (third idle)

However, if it is not disconnected, the current state is checked (404).

As a result of checking the current state (404), if it is the third idle state, it is checked whether the detected signal is a signal related to the asynchronous time division line signal protocol which should be received in the current state.

Next, the next state and timer are obtained from the database, the asynchronous time division LED on signal (busy signal) is sent, the state is updated (410), and the channel is placed in the first idle state and waits for a predetermined time.

As a result of checking the current state (404), if it is the first waiting state, the digit counter is incremented, updated to the next state (408), and waited for a predetermined time (second waiting).

When the current state is checked (404), if the second wait state is detected, the detected digit boundary is checked, the next state and the timer are updated (407), and the predetermined time is waited.

Next, as shown in FIG. 5, when the asynchronous time division line timer times out after a predetermined time elapses, offset data of a program to be serviced is obtained, and a current state is obtained.

Subsequently, timers to be serviced on the line and next state data are obtained from the database (ROM 5 in FIG. 1) according to the trunk type. (501)

The current state is then checked (502).

If the current state is checked (502), then the recovery state is reported, and the asynchronous time-sharing hook detection (hook off of the special relay terminal 102 subscriber of FIG. 1) is reported, and the channel is idle (506). Forcibly releases one of the lines in use on the board.

Subsequently, the next state and timer are obtained from the database, the asynchronous time-sharing LED off signal (end of use of the special relay station 102 subscriber of FIG. 1) is sent, the state is updated (508), and the channel is idle. 3 idle)

If the current state is checked (502) and the first idle state is checked, it is checked whether the detected signal is an asynchronous time division line signal protocol related signal that should be received in the current state.

Next, the next state and timer are obtained from the database, and the state is updated after sending out an asynchronous time division LED on signal (special relay 102 subscriber in use in FIG. 1). The asynchronous time division off-hook is then reported. (507)

If the current state is checked (502) and the first wait state is reached, the digit counter is cleared and then updated to the next state. (504) Next, the line is recovered.

If the current state is checked (502), and the second wait state is detected, the detected digit boundary is checked and the detected digit is reported and updated to the next state. (503) Subsequently, the predetermined time is waited. Waiting)

6 is a flowchart showing a signal transmission processing method to a counterpart exchange in the present invention communication system.

As shown in FIG. 6, the signal transmission processing method to the second exchanger 101 obtains data to be sent to the second exchanger 101 in all states, and checks the state of the channel. Receive the PB (Parallel Bus) message from the

The tone data is then obtained from the PB message, and the next out pulse state and timer value are obtained from the database (601).

The tone data is then checked (602).

Checking the tone data (602) updates the out pulse timer for each case when the frequencies (F1, F2 and F1 + F2) are 1600 Hz, 1200 Hz and 1600 Hz + 1200 Hz (603) (604) (605). Tone sending starts.

When the out pulse time is out, the out pulse mode is checked and the next out pulse state and timer value are obtained from the database (606).

Next, the frequency tone transmission is stopped, the next out pulse timer and state are updated (607), and the tone wait state is waited for a predetermined time (607).

As described above, the present invention supports different types of signals in one board, so it is easy to process and apply the signals, and it is possible to check the status of lines and exchanges between stations at all times, so that failure status can be automatically diagnosed and reported. It can operate a reliable communication system.

Claims (7)

A frequency tone matching unit which performs signaling with the relay line between the switching period or between stations using the frequency tone; It consists of an asynchronous time division control unit that monitors the relay station between the stations and connects any relay stations to use them when necessary, And the subscriber of the asynchronous time division controller monitors the use state of the frequency tone matcher and forcibly occupies the line of the frequency tone matcher if necessary. 2. The apparatus of claim 1, wherein the asynchronous time division controller comprises a display unit for indicating a case where the trunk line subscriber between the switching periods uses the line and a case where the asynchronous time division controller subscriber uses the line. Communication system. Storing the information detected in the communication line; Determining the line type by extracting the changed information from the stored information; Obtaining offset data of a program to be serviced and checking carrier information of the asynchronous time division information if the determination result is asynchronous time division information; And if it is determined that the frequency tone line is a carrier, checking the carrier information on the frequency tone. The method of claim 3, wherein the checking of the carrier information of the asynchronous time division information comprises: reporting a disconnection signal detection when the determination result is a disconnected state; Checking whether it is a signal related to a time division line signal protocol, connecting the communication line and the communication line of the asynchronous time division line subscriber, reporting the on-hook detection of the asynchronous time division subscriber if the recovery state is determined, A signal processing method in a communication system comprising the step of making it idle. 4. The method of claim 3, wherein the checking of the carrier information in the frequency tone comprises: checking the carrier information in the frequency tone and checking whether the signal is related to the asynchronous time division line signal protocol when the frequency tone is 1600 Hz. Updating a channel using the line in a first idle state for a predetermined time; and if the frequency tone is 1200 Hz, checking whether the detected signal is a signal related to a trunk line signal protocol to be received in a current state. Updating a next state and waiting a predetermined time for a channel using the line in a second idle state; if the frequency tone is a multi-tone of 1600 + 1200 Hz, checking whether a detected signal is a recovery protocol signal in a current state; Waiting for a period of time in a recovery state and if the frequency tone is not detected In the signal processing method in a communication system comprising the steps of checking the timer value. The method of claim 5, wherein the checking of the timer value comprises: generating a line state check monitoring protocol, reporting a line check monitoring, updating the state, and scheduling the first monitoring state if the timer value is greater than the line check monitoring value. Signal processing method comprising a step of waiting time. 7. The method of claim 6, wherein after the waiting period of time the loop occupancy detection from any switch is reported in the first idle state, the multi-frequency lines are checked in the second idle state and from asynchronous time division from any exchange. Report loop occupancy detection, issue an asynchronous time division LED off signal in the recovery state, report a line recovery signal from any exchange and idle the channel of the line, and in the first monitoring state Checking the status and stopping the monitoring pulse signal being sent to any exchange.