JPS6041500B2 - Interrupt control method during communication - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an interrupt control method between terminals and exchanges or between terminals, and particularly to an interrupt control method and an interrupt content delivery method.

In conventional circuit-switched networks, once a communication path between terminals is established and the information transfer state is entered, the transmission line from the terminal is disconnected when the signal bit is 0 and all data bits are 0 for a certain number or more. Since it was configured to detect only the following, it had the following drawbacks.

Even if an incoming call request is received from a third party other than the currently communicating terminal, and the exchange attempts to connect the line to the requested terminal, it must wait for the connected terminal to disconnect.

'o} If a new communication service request occurs from the terminal side during communication, the terminal must send a disconnection signal, go through an idle state, and then try to call again, which takes time and requires additional terminal operation procedures. is also complicated.

However, when sending a significant signal other than disconnection (such as a request to suspend transmission) during communication between terminals, it is necessary to temporarily change the data bits, and the transmission and reception of arbitrary information is not guaranteed.

In order to eliminate these drawbacks, the present invention makes it possible to perform interrupt communication between terminals and exchanges or between terminals by changing the contents of signal bits and data bits in communication signals between terminals. The drawings will be described in detail below. FIG. 1 shows a group of terminal interface circuits 11 and 12 necessary for implementing the present invention.
, 13, 14 and the signals transmitted to or received from the exchange.

That is, the transmission data circuit 11 from the terminal is converted into data bits 22, and the transmission control circuit 12 is converted into signal bits 21, respectively, via the line termination device 31, and the signals are sent out at any time.

On the other hand, the data bit 24 from the cross≠miss opportunity is converted to the reception data circuit 13, and the signal bit 23 to the reception control circuit 14, respectively, through the line termination device 31, and the signals are sent to the terminal.

The transmission control circuit 12 and the reception control circuit 14 are assumed to be in two states, ie, on and off. During information transfer between terminals, in other words, during communication, the transmission control circuit 12 is normally kept in the on state. There is.

Next, the operation on the exchange side will be explained.

Figure 2 shows the sequence of operations when a terminal interrupts the exchange by disconnecting and re-calling during communication, and Figure 3 shows the sequence of operations when the exchange interrupts the exchange during communication without waiting for the terminal to disconnect. The operation order when performing call display is shown below. In FIG. 2, terminal 01 and terminal 02 are communicating, and exchange 41 constantly monitors signal bits 21 and data bits 22 from terminal 01 through signal transmitting/receiving device 43.

When terminal 01 interrupts Kotate Keniso, transmission control circuit 12
By switching from ON to OFF, a certain number of envelopes are transported, which is recognized as the start of cutting the envelope with the signal bit 0 (corresponding to 1 in FIG. 4, Claim 2), or the transmission control circuit 12 is changed in an appropriate order to send out an appropriate order pattern of envelopes with a signal bit of 0 and a signal bit of 1, provided that the number of envelopes with a signal bit of 0 is recognized as the start of cutting (for example, 2) or less. (corresponding to 2 in FIG. 4 and claim 3), or by changing the transmission control circuit 12 from on to off and setting the transmission data circuit 11 to all non-zero pattern information, the signal bits can be changed. A specific pattern in which the data bits are 0 and all data bits are not 0 is transmitted a certain number of times (corresponding to 3 in FIG. 4, claim 4), or the transmission control circuit 12 is changed from on to off. By setting the transmission data circuit 11 to information of all patterns other than 0, a pattern in which the signal bit is 0 and the data bit is other than 0 (4 in FIG. 4, corresponding to claim 5) can be realized. Following the transmission, when the transmission control circuit 12 is changed from OFF to ON and an envelope with a signal bit of 1 is transmitted,
The signal transmitting/receiving device 43 of the exchange detects this as an interrupt request signal. At the same time, the exchange exchanges the contents of the data bits of the envelope whose signal bit is 0 (the fifth
1 in FIG. 5, corresponding to claim 6), or a combination pattern of 0 and 1 of the signal bits of the received envelope group (2 in FIG. 5, corresponding to claim 7)
or the signal bit in the received envelope is 0.
(3 in FIG. 5, corresponding to claim 8), or a signal following an envelope with a signal bit of 0 in a group of received envelopes. Contents of data bits of envelope with bit 1 (4 in Figure 5, corresponding to claim 9)
This allows you to know the content of the communication associated with the interrupt.

FIG. 6 shows an example of the configuration of an interrupt analysis circuit for analyzing interrupt contents, and data on the line is stored by an envelope buffer 51.

The signal bit 21 in this buffer is monitored by a signal bit pattern detection circuit 52 to detect the on/off state of the interrupt request state. At the same time, data bit pattern detection circuit 5
3 detects the interrupt contents in the data bit. In cases 1, 3, and 4 in FIG. 5, the data bit pattern detection circuit 5
3, or in the case of the same document 2, the signal bit pattern detection circuit 52 transfers the interrupt contents to the upper counterfeit 54. Terminal 2
For 0, the signal bit 21 is held at 1 and the data bits 22 are all held at 1 at the same time as the interrupt request from the terminal 01 is detected, so that the state appears equivalent to a no-communication state from the terminal 02's perspective.

While maintaining this state, the line through which the signal bits and data bits from terminal 01 are transmitted is disconnected and connected to the signal transmitting/receiving devices 42 and 43, and the line through which the signal bits and data bits from terminal 02 are transmitted is Leave it as is. This is to guarantee that the terminal 02 will not send any missing information. Further, after a certain period of time has elapsed, the exchange connects the transmission/reception line from the terminal 01 to the signal transmission/reception device 43 and the transmission/reception line from the terminal 02 to the signal transmission/reception device 42, respectively. Since the exchange has already received information regarding the interrupt from the terminal 01 at the time the connection is terminated, it is possible to respond to advanced service requests such as three-party communication. Next, an explanation will be given of an interruption to a process of a communicating terminal.

FIG. 3 shows an interrupt to a terminal. Terminal 01
When the exchange displays a spring call, which is an example of an interruption, to the terminal 01 during communication between the terminal 01 and the terminal 02, the signal transmitting/receiving device 43 is connected to the terminal 01, and the signal transmitting/receiving device 42 is connected to the terminal 02, respectively. The signal transmitting/receiving device 43 changes the signal bit 23 and data bit 24 into the above-mentioned interrupt request pattern, and at the same time sends the interrupt contents according to the above-mentioned pattern. The terminal 01 receives these interrupt requests and contents via the reception data circuit 13 and reception control circuit 14, and by analyzing them,
This interruption is treated as an incoming call indication. In this way, the exchange can display the necessary information regarding the side call that has interrupted the process of terminal 01, so that information can be delivered quickly without waiting for the terminal to be disconnected. Next, an example of a recovery operation after an interrupt will be explained.

An example of an operation for returning to a state in which communication is in progress between terminals after the interrupt operation is completed will be described. Terminal 01 during interrupt operation
, the terminal 02 is connected to the signal transmitting/receiving device 43 and the signal transmitting/receiving device 42, but after the interrupt operation is completed and the communication path between the terminals is connected, the signal bits of the envelope from the other terminal are continuously 1. transmission and reception control circuit 14
The on state is maintained, and the terminal can know that it has returned to the communicating state. As explained above, by changing the signal bits and data bits while the terminal is communicating, the exchange can detect the interrupt signal, distinguishing it from the disconnection signal. This has the advantage that the terminal can quickly transmit information to the exchange without sending any signals.

Further, by detecting and controlling the above-mentioned interrupt signals between terminals without the intervention of a switch, interrupt communication between terminals becomes possible. Furthermore, even when the terminal is communicating, by changing the signal bits and data bits, it is possible to display the incoming call and deliver the contents associated with the incoming call.
There is an advantage that the exchange can store information quickly without waiting for the terminal to be disconnected.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the signal transfer format between terminal exchanges, FIG. 2 is an explanatory diagram of the exchange interrupt operation according to the embodiment of the present invention, and FIG.
The figure is an explanatory diagram of an operation of displaying an incoming call to a terminal according to an embodiment of the present invention. Figure 4 is an explanatory diagram of the interrupt request envelope pattern.
FIG. 5 is an explanatory diagram of a method of displaying interrupt contents in an envelope. FIG. 6 shows an example of the configuration of an interrupt analysis circuit for analyzing interrupt contents. 01,02...terminal, 21,23...signal bit, 22,24...
...Data bit, 31...Line termination device,
41... Switching machine, 42, 43... Signal transmitting/receiving device, 51... Envelope buffer, 52...
...Signal bit pattern detection circuit, 53...
. . . Booter bit pattern detection circuit, 54 . . . Upper device. Figure 1 Figure 4 Figure 2 Figure 3 Figure 5 Figure 6

Claims (1)

[Claims] 1. On a transmission line between two terminals that transmits a periodic array of envelopes consisting of signal bits and data bits, an envelope in which the signal bit is 0 and all data bits are 1 is continuously transmitted during non-communication. In the envelope transmission method, during normal communication, the signal bit is 1 and the data bits transmit an envelope of arbitrary communication information, and at the end of communication, a certain number of envelopes with the signal bit 0 and all data bits 0 are continuously transmitted. An interrupt control method during communication, characterized in that an interrupt process of a receiving terminal or an accommodating exchange is interrupted by changing the contents of only the signal bit or both the signal bit and the data bit during communication. 2. The method according to claim 1, characterized in that an interrupt process of a receiving terminal or an accommodating exchange is interrupted by continuously sending envelopes with a signal bit of 0 or less from a transmitting terminal during communication. Interrupt control method during communication. 3. During communication, the transmitting terminal sends a pattern of an envelope with a signal bit of 0 and an envelope with a signal bit of 1 in an appropriate order, and in this case, by continuously transmitting a certain number or less envelopes with a signal bit of 0, reception is performed. 2. The communication interrupt control method according to claim 1, wherein the interrupt control method during communication is characterized in that the interrupt process of the terminal or the accommodating exchange is interrupted. 4. A patent claim characterized by interrupting the receiving terminal's interrupt process or the accommodating exchange by continuously transmitting a certain number of envelopes of a specific pattern in which the signal bit is 0 and the data bits are not all 0 from the transmitting terminal during communication. The range of communication interrupt control method described in item 1. 5. During communication, the transmitting terminal transmits an envelope with a specific pattern in which the signal bit is 0 and all data bits are not 0, followed by an envelope in which the signal bit is 1, in an appropriate order to prevent the receiving terminal from processing or accommodating the interrupt. 2. The communication interrupt control system according to claim 1, wherein the communication interrupt control method interrupts an exchange. 6. Interrupt control during communication according to claim 1 or 2, characterized in that the content of the communication accompanying the interrupt, such as the cause of the interrupt, is displayed in the data bit content of the envelope of signal bit 0 at the time of the interrupt. method. 7 The signal bit in the envelope at the time of interrupt is 0.
The interrupt control method during communication according to claim 1 or 3, characterized in that the communication content accompanying the interrupt, such as the cause of the interrupt, is displayed by a pattern in an appropriate order in which the signal bit is 1. . 8. Claim 1 or 8, characterized in that the contents of the envelope of a specific pattern in which the signal bits at the time of the interrupt are 0 and the data bits are not all 0 are used to display the communication content accompanying the interrupt, such as the cause of the interrupt, or The communication interrupt control method described in Section 4. 9. Claim 1, characterized in that the contents of the data bits of the envelope of signal bit 1, which follows the envelope of signal bit 0 at the time of interrupt, are used to display the communication content accompanying the interrupt, such as the cause of the interrupt. Or the communication interrupt control method described in Section 5. 10 Appropriately ordered pattern of signal bits of 0 and signal bits of 1 in the envelope at the time of interrupt, pattern of data bits in the envelope of signal bits of 0,
The claimed scope of the patent is characterized in that the communication content associated with an interrupt, such as the cause of the interrupt, is displayed by a combination of two or more data bit patterns of an envelope with a signal bit of 1 following an envelope with a signal bit of 0. The communication interrupt control method described in item 1. 11 When an interrupt is sent from a transmitting terminal to an exchange, the exchange receives part or all of the envelope related to the interrupt and converts the part or all of the envelope into an envelope in which the signal bit is 1 and the data bits are all 1. do,
2. The communication interrupt control method according to claim 1, wherein the communication interrupt control method is transmitted to a receiving terminal.