JPS5839139A - Communication confirming system - Google Patents

Abstract

PURPOSE:To prevent the ineffective suspension generated by noises or the like, by providing a means which transmits the confirming signal, which indicates that the line is occupied, at a prescribed period for every set call. CONSTITUTION:When a call is set between communication lines 3-11 and 3-31, a transmission timer circuit 115 and a reception timer circuit in channels corresponding to communication lines 3-11 and 3-31 in terminal station devices 1-1 and 1-3 start time counting. Since the terminal station device 101 transmits a signal frame including the request signal, which indicates that the line is busy, to the terminal station device 1-3 each time the transmission timer circuit counts a prescribed period, the reception timer circuit is reset within a prescribed time. The terminal station device 1-3 transmits a signal frame including the request signal, which indicates that the line is busy, to the terminal station device 1-1 also each time the transmission timer circuit counts a prescribed time; and thus, if a fault occurs on a transmission line 2, timer circuits of both terminal stations are not reset, and the set call is disconnected forcibly.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a communication confirmation system, which is connected to Il# by a transmission line, and accommodates IP! l#M The trace in the terminal equipment that sets up the call between (!l)
rJAsu・ Part 1 II is a diagram showing an example of an over-hired network that is subject to *issue@O. In No. 1111C, 1 terminal station 1-1 or 1it-
4 is a communication line 3-1t/'+ji3-111.3- which is connected to the transmission line 2 in a stacked manner and accommodates each communication line 3-1t/'+ji3-111.3-
21 to 3-2163-31 to 3-3m and 3-4
1 to 3-4 s1 Set up a call via the mutual Ktll transmission line - Terminal equipment 1-1 to jl via the transmission line 2
l-4 The information transmitted to the 211a IC
As shown in the example, 117 frames r are constructed. The 7-frame F consists of a 7-frame synchronous butter (sYN%l1tlL7 frame 8V-FbII No. 71/- frame 8G-F) and a plurality of packets 7 frame PKT-F), and includes various functions for call setup and disconnection. The signal is transmitted by the signal frame 8G-FIIc, and the data transmission by one established call is carried out by the packet 7 frame PKT-FK. As illustrated in FIG. 2, the signal frame 8G-F is Signal 7 ram 8G
- Control information CTL indicating use of F, destination information DA
, source information OAS approval signal CMD.

Response signal R8P, injury times IIO attribute TID, additional information pD, and mosquito additional information @O effective data length DL.

Arrangement K11l) The device keratoframe PKT-F composed of 4 check marks CHK is the control information CTL.

The transmission consists of information DA, transmission data DATA, and check code CHK. The above-mentioned source information DA and source information #OA [are the node address for identifying the terminal equipment, and the channel address for identifying the over-reliable line t. 683 is a diagram showing an example of the configuration of the signal 7 system relationship of a conventional terminal station device. #! In Figure 3, 7 frames F transmitted from the transmission path 2 to the terminal station are received by the frame receiving circuit 101, and after extracting the clock component and reproducing the data signal, the frame Generation 1 circuit 1
Frame synchronization is established by 02, and the timing generation circuit 103 reproduces and outputs the 7-frame receiving circuit 101 based on the clear pulse indicating the reception a-tck and the 7L/-me F distinction. O in received frame F
Sender information I) Decodes the node address containing the AIC and uses the address comparison circuit 105
・The address comparison circuit 105 compares the received node address with the node address unique to the edge addition g1 that is also supplied to the address storage circuit 106, and if the two sides match, sends a match notification signal to the 7th layer. The information is transmitted to the divider circuit 107 and the information decoding circuit 109. Frame separation circuit 1
07 is the frame circuit 1 based on the received coincidence notification signal.
The signal 7 beams 8G-F sent from the received 7 beams J-1i' transmitted from 01 to the end of the eyes are separated and selected by the selection circuit 10.
8. The selection circuit 108 extracts and decodes the transmission destination information DA in the received IttI key frame 5G-FO, extracts and decodes the information based on the match notification signal received from the comparison circuit 105, and sends the result to the channel control circuit. 110 and the frame generation 1 circuit 112. The channel control ff1 circuit 110 controls the channel 111 accommodating the required 4s line 3-XY based on the received information, and transmits the 4! Request signal C included in frame 5G-F
It executes call control in response to MDt or response signal R8P, and transmits the state of the channel 111 to the frame generation circuit 112.
Based on the channel 1110 status information received from
Generates the required signal frame 5G-F and transmits it to the frame multiplexing circuit 113.
3 is 7 frame receiving circuit 1.01 to frame separating circuit 1
07 and the signal 7 frame 5G-F transmitted from the frame generation circuit 112 to form a transmission frame F, which is transmitted via the frame transmission circuit 114 to the transmission path 2 A terminal station f! has the structure of transmitting to/from f! An example of a conventional signal system exchanged between boxes for setting up and disconnecting calls is shown in FIG. 4. In FIG. 4, a communication line 3 accommodated in a terminal station **1-1 -11 to elaboration [@k[) accommodated in 111-3, node address sequence corresponding to terminal equipment 1-sk to U communication circuit 13-31: destination information including channel address Dmu, self-end addition [1-1 and through (
1. A signal having source information OA including the node address and channel address corresponding to the line 3-11, and a request signal CMD indicating a connection request.

Generates a signal frame 5G-Ft, multiplexes the frame FK, and sends it to the transmission path 2. The signal frame 5G-F is transmitted to the terminal device 1-3 via the terminal device 11-2. Device 1-3 is based on the above-mentioned Section 11) 1.
Separate and resolve G-F, communicate - eiis-sxIIc
When the incoming call signal C is sent and the communication line 3-31 is communicable, the terminal station 1-3 returns the communicable signal d to the terminal station ll-3. The end of the cicada process is 1-1 and the communication line! Destination information DA including node address and channel address corresponding to -11, source information OA including node address and channel address corresponding to terminal station device 1-3 and communication *ll-3-31, communication to Generates a signal 7 frame 8G-F with response number R8P indicating re-response et, multiplexes the frame FK and sends it to the transmission path 2. The signal frame 8G-F is sent via the terminal equipment w1-4 pipe. Leakage addition m1-IK transmission.
The terminal device 1-1#i separates, decodes, and decodes the signal frame 5G-Ff through the above-described process, and the communication line 3-11. Send communication enable signal f to 0 or more
1, and data g is transmitted using a packet frame PKT-F. When the transmission of data g is completed and a disconnection signal is transmitted from 11 messages @ line 3-11, terminal station @ff1l 1-1 generates a signal frame 5G-F including a request signal CMD indicating the amount of restoration requested. ,flame! The signals are multiplexed into the transmission line 2 and laterally distributed to the transmission line 2. The end adder *1-3 separates and decodes the signal frame 5G-F, and connects the communication line 3-
31, and generates a signal frame 5G-F including a response @# R8P indicating a disconnection acknowledgment O;
Although the 7-ray 15-FK multiplex is sent to the transmission line 2 and the call being set up is disconnected, the end adder fill-1 receives the signal frame 5G.
-Ft separation and deciphering, communication times 13-11 and 3-31
As is clear from the above description of Ij2, in this conventional lumber terminal equipment, calls set for the outgoing and incoming calls are sent to a predetermined O after the required data go transmission is completed. When the disconnection signal and j are transmitted, it is disconnected. Therefore, in the process of transmitting the data g, for example, the transmission line 2K
li error occurs, and a call is lost between the calling and called terminal equipment.
In order to eliminate the drawback that if the transmission of the various signals necessary for disconnection is interrupted, the call will be held without being disconnected and the communication circuit will be held invalid. Attempts have also been made to provide a means to confirm that communication is in progress, but it is difficult to
It is extremely difficult to expect countermeasures for all accommodating communication lines IK.The purpose of the present invention is to eliminate the shortcomings of this type of conventional terminal equipment as described above, and to improve the accommodating communication line IK. *MLK is a means of authenticating the letter M of the call being set up without expecting any special means.

The purpose of this is to set up a call to the accommodation channel 4I @ Somutsuki via the sM transmission channel t, which is connected to the transmission line k.
＠In the system, for each call that is being set up, a confirmation signal indicating the communication circuit in Zhannan is transmitted at the necessary intervals from the opposite end processing device of the call, and the transmission is transmitted from the opposite end station device of the call. The N
This is achieved by providing a means for monitoring the reception interval of the acknowledgment signal O, and disconnecting a call whose reception interval exceeds the required period, thereby releasing the communication line occupied by the call.

An embodiment of the present invention will be explained below with reference to @5ail and FIG. 6WA
5511 is a diagram showing a signal sequence according to an embodiment of the present invention. Note that throughout all mt-, the same # indicates the same object. It is possible to install a transmission timer circuit 115 and an injury timer circuit 116 in the channel 111' that accommodates the line 3-XY. ◎The transmission timer circuit 115 companies correspond to the notification that a call has been set up on the line 3-XY via the channel system. #Circuit 1" When transmitted from 0, the channel control circuit 110 is activated every 1 period until the call is released, and a request signal CMD1-containing signal frame 8G- indicating communication confirmation for the call is sent. F
On the other hand, upon receiving the call setup notification from the channel control circuit 110, the reception timer circuit 116 starts counting, and the reception timer circuit 116 starts timing, and the frame generation circuit 116 receives the call 6 from the opposite end station equipment at a predetermined cycle of 1°. Each time the information decoding circuit 109 and the channel control device ff 10p detect the arrival of a signal frame 5G-F containing a request signal CMD indicating a communication confirmation tube, it is reset and starts counting again.

Received tie! Circuit 1, 1□60 measurement time is the predetermined period t
・When the period t1, which is determined to be sufficiently longer, is exceeded, the channel 111'a channel control circuit 11G is activated;
As in FIG. 4, the end adder a
The 61st!1 will explain the setting status of a call from the communication line m3-11 accommodated in t-s to the communication line 3-31 accommodated in one end station device 1-3.・Communication line [The process remains the same as in Fig. 4 until the call signal layer is transmitted from 3-11, one call is set, and the communication ready signal f is returned from the terminal equipment fill-1 to the communication line 3-111. 0 communication times 1m
When a call is set up between 3-11 and 3-31, the transmission timer in channel 111' corresponding to communication lines 13-11 and 3-31 in 1-1 and 1-3 is activated. The circuit 115 and the reception timer circuit 116 start timing f: ◎In the terminal device 1-1, the transmission timer circuit 115 starts counting at a fixed period of 1. Confirm that communication is in progress every time you measure gs, gee g
Since the signal frame 5G-F including the request signal CMD indicating m... is transmitted to the end additions flF1 to flF3, the end "
Each time the station device 1-3 receives the signal frame 5G-F, the station device 1-3 activates the cocoon IF' reception tie i circuit 116 for a predetermined period 1. Reset before measuring.

-Mandanka fil 1. -3 is also the transmission timer circuit 11
Every time 5 measures a predetermined period t, the communication status is confirmed '9te.
The signal 7 frame 5G-F including the request signal CMD indicating p # # p reference... is sent, but ] 111 confirmation p
Signal frame 8G-F including request signal CMD'f indicating m
does not reach the end adder 1-1 due to a failure in transmission #1-1, the receive timer circuit 116 in the end adder #1-i rc stops communication 9-1! After receiving the signal 7-ray 5-8G-F containing the request signal CMD indicating pm, the clock continues to be counted, and finally the predetermined period 1.・Channel control circuit 110a is activated.
Signal 7 frame 5a containing a request signal CMD indicating that it has been determined that communication from the terminal device 11-3 regarding the call being set up has been interrupted, and indicating a "recovery request regarding the call being set up between 1i13-11 and 3-310." -yo generation t7 frame generation circuit 1
Request 12 to disconnect the call being set, and at the same time send a disconnection signal r to corresponding channel 111'K communication line 3-1.1 to release it from the call. The signal frame 5G-PR generated by the generation circuit 112 is IK-multiplexed into 7 frames with 0 bits as described above, routed through the transmission line 2, and processed into the end-modified fil! 173 K transmitted/The signal 7
The terminal device 11-3 that received the frame 5G-F executes the process of disconnecting the call being set and sends a disconnection signal j to the communication line 3-31.
As is clear from the above description, according to this embodiment, the terminal equipment 1-1 and ! are released from the outgoing call. -3 is the call KII being set and the predetermined period t
Opposite terminal station installed for each I! -3 stacking is 1-IK call confirmation signal 7 frames 5G-F is sent and received, opposite terminal equipment-3
Further, the signal frame 5G transmitted from #-1l-1
-F is monitored, and the signal frame 5G-F is maintained for a predetermined period t,
Since the call being set due to the interruption is forcibly disconnected, communication lines @3-11 and 3-31 are prevented from being held invalid.In addition, 1115Ii! 1. For example, the call setting is performed by the communication circuit 3-1.
The effect of the present invention is not limited to communication lines between 1 and 3 and 31 stores, and the effects of the present invention do not change even when the communication lines are set between other communication lines. In the case of other signal sequences, W (the effect of the present invention does not change) ◎ Also, the shape of the transmission network, signal and data transmission formats, and terminals that are the subject of the present invention The groove bottom of the station equipment is not added to the one shown in the figure, and can be used for transmission lines of other shapes - 1 for other signals and '
Even if the terminal equipment has a data transmission format or other O configuration (the effectiveness of the present invention does not change),
According to the present invention, it is possible to detect communication interruption of a call that is being set up without providing a means for checking which part of the accommodated communication line is in use. It becomes possible to

[Brief explanation of the drawing]

Part 1 II shows an example of a communication network to which the present invention is applied.
1%112 Figure 1 shows an example of a 7-frame configuration used in Figure 1. Figure 3 shows a conventional terminal station load 0 signal array!
Figures 611 to 611 are diagrams illustrating configuration examples of relationships; Figures #L4 are diagrams illustrating an example of a conventional signal sequence; is a diagram showing a signal sequence according to an embodiment of the present invention. In the figure, 11-1 to 1-4 are terminal devices, 2 is a transmission line, and 3-11 to 3-1 are 3-21 to 3-1. 21j3-
31 to 3-3m and 3-41 to 3-41 are communication lines, 101 is a frame receiving circuit, 102 is a frame synchronization circuit, 103 is a tie ζ puffer generation circuit, 104 is an address decoding circuit, 103 is an address comparison circuit, 106ti Address storage circuit, 107Fi7 frame separation circuit, 108 selection circuit, 109 information decoding circuit, 110#i channel control circuit, 111 and 111' channels, 112F
i-frame generation circuit, 113 is frame multiplexing circuit-11
4 is a frame transmission circuit, 115 is a transmission timer circuit, 1
16 is the reception evening. timer circuit, F Fiy frame, SYN is frame synchronization pattern, 5V-F is network monitoring 7 frame, 5
G-FFi signal frame, PKT-Fit packet frame, CTL is control information, Dlj destination information, OA is source information, CMDFi request signal, R8P is response signal, T
ID is communication line attribute, ADD is additional information, DL is additional information effective data length, CHK is error detection code, DATA is transmission data, aii calling signal, b#i connection request signal, C#
i indicates an incoming call signal, d and f indicate a communication ready signal, e indicates a communication ready response signal, g indicates data, h, J and r indicate cutting wound No. 7, I indicates a recovery approval signal, and O indicates a disconnection confirmation response signal. . F/Artist Mr. Z

Claims (1)

[Claims] Terminal stations M, which are connected to each other by a transmission line and which set up a call to an accommodating MBS mutual connection via the transmission line, send a confirmation signal indicating that the call is occupied 4B times for each call being set up. Means for transmitting the confirmation signal to the opposite end station device of the call at a required period, and means for monitoring the reception interval of the confirmation signal transmitted from the end station IRJW & Wax of the call are provided. Disconnecting a call that exceeds the foot period and releasing the O communication line S occupied by the call 1i-Featured communication confirmation method 0