JPS6211829B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method in which communication is reserved before the actual communication time, and communication lines necessary for the communication are connected at the reserved start time and disconnected at the end time. It is.

Generally, for meetings and lectures, conference rooms are reserved in advance and the participants are informed. As a method for conducting such meetings and lectures between two separate locations, a system for teleconferencing and televised lectures has been considered. When using such a system, in addition to reserving a conference room or lecture room, it is also necessary to reserve a communication line between two points. Generally, when setting up a communication line between two points, the information is relayed multiple times. In other words, it is set up by connecting multiple trunk lines. These relay lines are shared by many subscribers, and as time passes, the number of subscribers using the relay lines changes. In order to make communication line reservations a reality, it is necessary to guarantee 100% that the necessary relay lines will be available at the scheduled time.

A television relay system is a specific example of such communication line reservation and communication line setting based on the reservation. In this system, in order to guarantee line setting at the time of communication line reservation, a method is adopted in which a relay line is actually allocated, and at the time when the line is set, the pre-allocated relay line is connected.

However, with this method, it is necessary to manage the lines of the entire system on a line-by-line basis, and the amount of data required for processing to guarantee the line settings for the section determined at the time of reservation is large, and the processing time is also long. Another drawback is that since the lines specified at the time of line setup are connected, it is necessary to perform different control from the general line setting method, which connects free lines one after another.

In order to eliminate these drawbacks, the present invention accepts reservations based only on the determined communication line route between the destinations and the availability of relay lines between each relay station, and at the time of connection, the route determined at the time of reservation is used. Therefore, the system is designed to connect idle lines, and the drawings will be described in detail below.

FIG. 1 is a diagram for explaining the principle of the guarantee method for setting up a communication line (hereinafter referred to as line) in the present invention, where A indicates the order of reservation applications between certain relay stations, a ₁ ...a _o ... It shows that reservation applications for time slots t _o1 to _{t o2} were received in the order of . The solid line in B is a ₁
~a The number of vacant lines at the actual operating time at the time of accepting the application for ₉ , that is, the number of lines between the relevant relay stations (assumed to be 5 lines) and the number of lines scheduled to be used by reservations at each time. It shows the difference. At this point (at the time of A ₉ reception), the number of free lines is zero during the time period from t ₈₁ to t ₆₂ , and 5 lines will be used due to reservations from a ₁ to _{a 9} .
Reservations for this period will not be accepted. Therefore, reservations for A ₁₀ that were subsequently applied for are T ₁₀₁ ~
Since the time period _t102 includes the time period _t81 to _t62 , it is not accepted as reservation is not possible. The subsequent reservation for _A11 is accepted because the time slot from _t111 to _t112 does not include the time slot from _t81 to _t62 . At this time, the number of idle lines is now shown as a dotted line in Figure B, and a new
During the time periods _t31 to _t52 , _t61 to _t112 , all lines between the relevant relay stations will be used, and after the reservation reception for _a11 , the time periods _t31 to _t52 , _t61 to _t112 , t Reservations that include the time slot from ₈₁ to _t62 will not be accepted. In this way, at the time of reservation, it is simply checked whether there is an idle line at each time, regardless of which line is used for which reservation between the relay stations.

FIG. 1C shows a line allocation method during actual operation, and b ₁ to _{b 5} indicate each of the five lines provided between the relay stations. FIG. 1C shows a case where, at the start time t _o1 of each reservation, lines are allocated starting from the lowest available line number. As shown in this figure, lines are allocated to all accepted reservations using the method described above.

Figure 1D shows the line allocation situation when a user of _A5 requests a time extension until _T53 during actual operation. Whether or not this extension is possible is also determined by the method explained with reference to FIG. In other words, in this case, the number of idle lines is zero from the end time _t52 of the reservation for _A5 to the extended end time _t53 (in this example, _t31 to _t52 , _t61 to _t112 , Whether or not an extension is possible is determined based on whether or not t ₈₁ to t ₆₂ ) are included, and in this case, the extension is accepted because it is not included. In this case, line _b2 will be used by the subscriber of _a5 until _t53 (= _t61 ), as shown by ≦ in D of the same figure. Therefore, the vacant line at time _t41 is _b3 , and if there is no extension of _a5 , the reservation of _a4 allocated to _b2 (see C in the same figure) is allocated to line _b3 . Similarly t ₆₁
In this case, the free line is _b2 , so the reservation for _a6 is allocated to _b2 . In this way, even if a reservation is changed during operation, it can be determined whether or not the change can be made based solely on whether or not there are vacancies as a whole, and line allocation is also guaranteed.
This method is valid in any case for the following reasons. Assuming that the number of lines between the relay stations is m, the above method guarantees that no more than m reservations will be accepted at any time. Therefore, numbers 1, 2, 3, etc. will be given in order from the line used,
At the time when the use of a line ends, it is assumed that numbers 1, 2, 3, etc. are reassigned to lines that will continue to be used after that time. If you think about it this way, at any given time, the lines are in use starting from the lowest number.
Vacant lines are always assigned the oldest numbers, and all lines are used only when the number of reservations reaches m. Since this line numbering is done without changing the status of the line that is actually in use, it is guaranteed that the line that is already in use can be used until the end time, and the use of the line can be started if the reservation is less than m. Since there is always a free line, the start of use is guaranteed.
In other words, as explained in Figure 1, it is possible to guarantee 100% possibility of line allocation if reservations (including changes during operation) are judged based solely on the presence or absence of free lines at each time. .

FIG. 2 is a diagram explaining the reservation processing method based on the principle of FIG. 1, where e ₁ , e ₂ , e ₃ , e ₄ are terminals f ₁ to f ₅ are relay stations, l ₁₂ , l ₂₃ , l ₁₅ , I ₂₅ , and l ₂₄ are between relay stations (relay sections) with relay lines. Here, to simplify the explanation, it is assumed that the relay station in which the terminal is accommodated and the terminal are connected by a dedicated subscriber line. (If a subscriber line is shared by multiple terminals, the section of the subscriber line where the terminals are accommodated can also be treated as a relay section, so it can be treated in the same way as the explanation below.)
Assume that a reservation request is made between terminals _e1 and _e2 .
In this case, the availability of this reservation is determined based on whether or not there is a line available for l ₁₂ and l ₂₃ at the same time or l ₁₅ , I ₂₅ and l ₂₃ at the same time for all the reservation time slots, and one of each group has a line available. If there is a vacant state, it is determined that the reservation is possible, and if there is no vacant state, it is determined that the reservation is not possible and the process is performed. In this case, the line needs to be used during operation according to the route for which reservation has been determined. Otherwise, lines scheduled for other reservations may become unavailable at the time of operation, and lines between reserved terminals may not be secured during operation. For example the terminal
Reservations have been made for calls e ₃ and e ₄ , and relay sections l ₁₅ ,
It is assumed that l ₂₅ has only one relay line and that the line in the relay section l ₂₅ is used to accept reservations. In this case, the reservation for the call between terminals e ₁ and e ₂ is made in the relay section.
Check that the relay lines for l ₁₂ and l ₂₃ are vacant and then accept the request. In this state, if the call between terminals e ₁ and e ₂ is started first and the call is started using the empty lines in the relay sections l ₁₅ , l ₂₅ , l ₂₃ , then the terminal e For calls between ₃ and _e4 , both _l15 and _l25 are not available, so it is impossible to secure a line at the time of operation. Therefore, it is necessary to set up a relay line along the route that has been checked to see if there is an empty line at the time of reservation. This method involves specifying the relay stations to pass through (in the above example, terminals e ₁ and e ₂ are connected to f ₁ , -f ₂ , -f ₃ ; terminals e ₃ and e _{4 are}
(between terminals e ₁ and e ₂ is l ₁₂ , -l ₁₃ ) or between terminals e _{3 and} e ₄ is l ₂₅ ) _. Do this using the following method.

FIG. 3 shows an embodiment of the present invention, in which f ₁₀ , f ₂₀ ,
f ₃₀ and f ₄₀ are relay stations 10, 20, 30, 40, relay switches in each relay station, 11, 21, 31, 4
1 is the controller of each relay switch, 51, 52, 53
is the empty trunk line number selected from the relay line group between each relay station, 12, 22, 32, 33, and 42 are the line groups to other relay stations or terminals, 60 and 61 are the terminals, and 62 and 63 are Subscriber line, 70 is reservation center,
71 is a terminal accommodation status file, 72 is a route selection file, 73 is a line reservation status file, 74 is an operation file, 75 is a line control signal generator, 76
77 is a reservation information input terminal, 77 is a reservation availability information output terminal, 78 is a reservation inquiry device, 81 is a control line between the reservation center and the originating relay station, and 82 is a control line between the relay stations.

In FIG. 3, a terminal accommodating status file 71 is a file in which relay stations accommodating terminals for which reservations are made are organized.

The route selection file 72 is a file organized in descending order of priority of routes when setting up a line between any two of the relay stations explained in FIG. ₁ and f ₃ , the highest priority route is f ₁ - _{f 2} - f ₃ (or l ₁₂ - l ₂₃ ), and the next priority route is f ₁ - f ₅ - f ₂ - f ₃ (or l ₁₅ - _{l 25} -l ₂₃ ) are stored in the form of relay stations or relay sections to be passed through. The line reservation status file 73 stores the line reservation status in a form that allows searching for the number of free lines at each time as explained in FIG. A method of filing the number of lines and the operation start time and operation end time used for reservations accepted by the relay section, or an appropriate time interval (for example, 15
minutes), set the initial value of the number of free lines for each divided time interval as the value of the total number of lines in each relay section, and increase or decrease the number of free lines in the relay section used according to accepted reservations, etc. This can be easily achieved by In the former case, the number of reservations included in the time period from the operation start time to the operation end time is counted for each relay section to be searched, and the counting result is used as the number of reservations in the time period from the operation start time to the operation end time. By subtracting it from the total number of lines, the number of free lines at each time can be determined. In the latter case, it can be directly determined by reading the number of vacant lines in the divided time interval that includes the time to be determined for each relay section. Further, the operation file 74 stores the operation start time and operation end time of each accepted reservation, the route used for the reservation, and the like.

When accepting a reservation, first input the reservation information from the reservation information input terminal. This reservation information includes the type of reservation, i.e., new reservation, reservation change, cancellation designation, reservation identification code (not required for new reservations), reservation operation start time and end time (if changed, the new time, cancellation ), and information specifying the calling and receiving terminals for setting up the line. The reservation verification device 78 determines whether or not a reservation can be made based on the information in the terminal accommodation status file 71, route selection file 72, line reservation status file 73, and operation file 74, depending on the type of reservation described above. If so, the line reservation status file 73 and operation file 74 are updated. That is, in the case of a new reservation, the reservation verification device 78 uses the terminal accommodating status file 71 to search for relay stations that accommodate both the originating terminal and the terminating terminal. For example, if terminal e ₁ in FIG. 2 is the originating terminal and e ₂ is the terminating terminal, the originating relay station f ₁ and the terminating relay station f ₃ are obtained as the search results. Next, a route selection file 72 selects a route between the originating relay station and the terminating relay station. In the above example, the path is f ₁ − f ₂
The route −f ₃ is selected as the highest priority route, and the route f ₁ −f ₅ −f ₂ −f ₃ is selected as the second priority route. Next, for each relay section of the selected route, the presence or absence of an idle line in the reserved time slot between the reservation operation start time and operation end time is checked in descending order of priority. In the above example, first, in the order of relay sections l ₁₂ and l ₂₃ used for the route f ₁ - _{f 2} - f ₃ , it is checked whether there are free lines at all times in the reserved time slot, and the relay sections
If both l ₁₂ and l ₂₃ have free lines, reservations are allowed, and if either l ₁₂ or l ₂₃ includes a time when there is no free line, reservations for this route are not allowed. Stop matching and move to next rank, i.e.
The relay section l ₁₅ used for the route f ₁ −f ₅ −f ₂ −f ₃ ,
The presence or absence of free lines for l ₂₅ and l ₂₃ is checked in the same way, and it is determined whether a reservation can be made for this route. With the above operation,
If all of the selected routes cannot be reserved, information indicating that reservations cannot be made is output to the reservation availability information output terminal 77, and the process ends. On the other hand, if there is a route that can be reserved among the selected routes, the checking operation is terminated at that point, and the line reservation information file 73 and operation file 74 are updated based on the reservation information. For example in the example above
If the reservation is possible through the route f ₁ - f ₂ - f ₃ , the verification ends at that point, and the number of free lines in the reservation time period of the reservation in the relay sections l ₁₂ and l ₂₃ of the line reservation information file is calculated. is decremented by 1, and the operation information, that is, the reservation identification code (for example, reservation number), the calling terminal name, the called terminal name (for example, the subscriber number of the terminal), the relay route, the operation start time, and the operation end time is added to the operation file 74. Record. Reservation verification device 78
After completing the above operations, it outputs reservation acceptance information (for example, information recorded in the operation file 74) to the reservation availability information output terminal 77, and ends the operation. In the case of cancellation of a reservation, the reservation verification device 78 reads the operation information of the reservation from the operation file 74 based on the identification code of the reservation, and updates the line reservation status file 73 based on the operation start time and operation end time. Increases the value of the vacant line board in the reservation time slot of all the relay sections used for the relay route by 1, deletes the operation information of the reservation in the operation file, and sends reservation cancellation reception information to the reservation availability information output terminal. Output and end the operation.

In the case of a reservation change, the reservation verification device 78 reads the operation information of the reservation from the operation file 74 based on the reservation identification code and temporarily stores it. The process for new reservations described above will continue, but when checking whether there are free lines in each relay section, check whether the relay section used for the selected route overlaps with the already reserved line. If there is an overlapping portion, the number of free lines in each relay section is compared with a value in which only the overlapping portion is incremented by 1.
If the reservation is possible through the above operations, the reservation verification device 78 checks the value of the number of free lines in the reservation time slot of all the relay sections used for the reservation in the already reserved line reservation status file 73. 1 and delete the operation information for the reservation in the operation file 74, and then update the number of free lines in the line reservation information file 73 and update the operation information in the operation file 74 for the newly accepted changed reservation. is recorded, change acceptance information is output to the reservation availability information output terminal 77, and the operation ends.
On the other hand, if the reservation cannot be changed (if the reservation is not possible due to the above operation), the reservation verification device 78 first outputs the information that the reservation cannot be changed to the reservation availability information output terminal 77,
Information regarding reservation hold or reservation cancellation is obtained from the reservation information input terminal 76 again. If reservation hold information is input to the reservation information input terminal 76 in this state, the operation is immediately terminated, the reservation that has already been accepted before the change remains as it is, and the reservation hold information is output to the reservation availability information output terminal 77. Finish the action. In addition, when reservation cancellation information is input, the above-mentioned reservation cancellation operation is performed, that is, the number of free lines in the relevant reservation part of the line reservation status file is increased by 1, and the operation information of the relevant reservation in the operation file 74 is deleted. Reservation cancellation information is output to the reservation information output terminal 77, and the operation ends.

The operation when accepting reservations explained above is for new reservations,
In the case of cancellation and cancellation, it is valid until the operation start time of each reservation, and reservation changes can be made until the operation end time, and there is an advantage that all reception operations can be performed in the same process.

Next, the operation when connecting each reserved line will be explained. First, the line control signal generator 75 reads the operation information of the reservation that will start operation after a predetermined time has elapsed from the operation file 74, classifies it by relay station where the originating terminal is accommodated (hereinafter referred to as originating relay station), and operates the information. Before the start time, operational information is sent to the controller of each originating relay station using the control line between the reservation center and each relay station. For ease of explanation relay station f ₁₀
A case will be explained in which the transmitting station is the transmitting station. In this case the relay station
The controller 11 of _f10 is connected to the control line 8 with the reservation center 70.
1 from the line control signal generating device 75 of the reservation center 70. The controllers 11 of the relay station _f10 are arranged in descending order of operation start time. In addition, the line control signal generator 75 of the reservation center 70 constantly monitors the operation file 74 to see if the reservation for which operational information has been sent has been changed or canceled, and if there is a change in the operational information that has already been sent, it will immediately notify the user. The change information is sent to the transmitting station. In the above example, when the controller 11 of the relay station f ₁₀ receives the change information sent via the control line 81 with the reservation center 70, the controller 11 of the relay station f 10 updates the relevant part of the operational information that has already been received and organized. Fix it. When the operation start time of the reservation arrives, the originating station reads the reservation route from the operation information of the reservation, and sends a connection instruction signal to the controller of each related relay station using the control line between each relay station. Set. Also, at the end of the operation, the relay line is disconnected from the receiving station. To simplify the explanation, it is assumed that the originating station is relay station f ₁₀ as in the above, and the route is specified as f ₁₀ − f ₂₀ − f ₃₀ − f ₄₀ to accommodate relay station f ₁₀ . A case will be explained in which the terminal 60 that sends a call becomes the calling terminal, and the terminal 61 accommodated in the relay station _f40 becomes the receiving terminal. In this case, relay station _f40 becomes the terminating station. The controller 11 of the transmitting station _f10 reads out the operation information of the reservation from the organized operation information when the operation start time of the reservation for which the next line setting is to be performed comes. In the above example, it is read from this operational information that the reservation route is f ₁₀ - f ₂₀ - f ₃₀ - f ₄₀ , and the reservation is sent to the controller of each relay station via the control line 82 between the relay stations. The code, the designation information of the next relay station to which each relay station will connect, and the end time of operation of the reservation and the designation information of the reception terminal are transmitted to the destination station. In the above example, the reservation identification code and the next relay station name f ₃₀ are sent to the controller 21 of relay station f ₂₀ , and the reservation identification code and the next relay station name are sent to the controller 31 of relay station f ₃₀ . The station name f ₄₀ is sent to the controller 41 of the relay station f ₄₀ along with the reservation identification code, the name of the called terminal, and the operation end time. Each relay station f _{20 ,} f ₃₀ , f ₄₀ that has received the connection instruction signal from the controller 11 of the originating station f 10 enters a standby state for setting up a line according to the next instruction. When the controller 11 of the originating station f ₁₀ finishes sending out the connection instruction signal, it immediately controls the relay switch 10 of the originating station f ₁₀ to connect the subscriber line 62 to which the originating terminal 60 of the reservation is connected.
, selects and connects a vacant relay line between relay stations f ₁₀ and f ₂₀ , and sends the line number and reservation identification number of the connected relay line to the next relay station f via the control line 82. ₂₀ controllers 21.
For example, if the line number connected to relay station _f10 is 51, the reservation identification code and the number 51 are sent. Next, the controller 21 of the relay station f ₂₀ , which received the reservation identification code and number 51 from the controller 11 of the relay station f ₁₀ , checks the reservation identification code of the connection instruction signal that has already been received, and selects the next relay. Deciphers that the station is _f30 , immediately controls relay switch 20, similarly selects an empty relay line (for example, 52) between relay stations _f20 and _f30 , connects relay lines 51 and 52,
The reservation identification code and the selected relay line number 52 are sent to the controller 31 of the relay station _f30 . The controller 31 of the relay station f ₃₀ similarly controls the relay switch 30 to connect the vacant relay line 53 of the relay stations f ₃₀ and f ₄₀ to the relay line 52 selected by the relay station f 20, and connects the relay line 53 of the relay station f ₃₀ and f 40 to the relay line 52 selected by the relay station f ₂₀ . The reservation identification code and the selected trunk line number 53 are sent to the controller 41 of the controller 41 . The controller f ₄₁ of the relay station (receiving station) f ₄₀ checks the already received connection instruction signal, decodes that the terminating terminal is 61 from the terminating terminal name and the operation end time, and switches the relay switch 40. The relay station f ₃₀ connects the selected relay line 53 to the subscriber line 63 to which the receiving terminal 61 is connected. With the above operations, the line between the calling terminal 60 and the receiving terminal 61 is set up and a conversation is established.

In the above operation, it is guaranteed that there is a free line between each relay station, as explained in FIGS. 1 and 2, and connection will not be impossible due to the lack of a free line during the operation. Also, with the above operation, the relay station
f ₂₀ and f ₃₀ end all operations. After the above operations are completed, the controller 41 of the receiving station _f40 controls the relay switch 40 to disconnect the subscriber line 63 and the relay line 53 when the already received operation end time comes. When relay station f ₃₀ detects that relay line 53 has been disconnected at relay station f ₄₀ , it disconnects relay lines 52 and 53, and similarly, relay station f ₂₀ disconnects relay lines 51 and 5.
2, the transmitting station _f10 connects the trunk line 51 and the subscriber line 6.
2 and complete all operations. This disconnection operation is similar to the conventional disconnection method for telephone lines, etc., except that the connection is disconnected at the termination time of the operation information at the receiving station _f40 .

Next, after setting up the line, if the user requests an extension or shortening of the operation start/end time and the reservation center accepts the request, the line control signal generator 75 at the reservation center reads the information from the operation file and immediately sends the request. Modification information of the operational information is sent to the controller 11 of station f ₁₀ using the control line 81. The controller 11 of the originating station f ₁₀ decodes from this modification information that this is a change in the operation end time of a reservation whose line connection has already been terminated, and the controller 11 of the originating station f 10
The identification code of the reservation and the changed operation end time are sent to the controller 41 of No. 0 via the control line 82. When the controller 41 of the receiving station 40 receives this information, it compares it with the already received connection instruction signal, corrects the operation end time of the reservation, and performs the above-mentioned line disconnection operation at the revised operation end time. .

In the above operations, the line connection method is the same as that of conventional telephone lines, except that the next relay station to be connected to is determined in advance, and the disconnection starts at the receiving station at the end of the operation. Other than that, it's the same. Furthermore, according to the present invention, it is necessary to send designation information of the next transit relay station from the originating station to each relay station, but there is no need to perform route selection including a detour route, which is performed in line connections such as general telephone lines. Therefore, control at each relay station is simplified. In addition, in the above explanation, it was explained that connection instruction information is sent in advance from the originating station to each relay station using a control line, but after the connection at the originating station is completed, all of the relay routes following the next relay station are sent. Possible methods include sending the information and the number of the selected idle relay line sequentially, or sending the information to start disconnecting the relay line at the end of operation time from the originating station to the destination station after the end of operation time. Basically, any method may be used as long as the connection is made sequentially from the originating station to the terminating station, and the disconnection is performed sequentially from the terminating station to the originating station.

As explained above, according to the present invention, the guarantee of communication line settings before the communication time can be determined simply by whether all the relay lines between each relay station are used. The amount of information required for processing is small, the processing is simple, and the processing time is short. In addition, when adding relay lines or creating a new relay section, the relevant part of the route selection file must be changed, and the number of lines in the relevant relay section in the line reservation status file must be increased by the number of lines added or newly established. There is great flexibility in making these changes. In addition, when controlling the communication line settings during actual operation, although route specification is necessary, empty lines are selected and connected sequentially from the originating station, and when the line is disconnected, the next line is disconnected sequentially from the receiving station. It has many advantages, such as being very close to controlling the connection and disconnection of conventional telephones, etc., and highly compatible with telephone communication systems that are used in similar manners, such as video telephones.

[Brief explanation of the drawing]

Fig. 1 is a diagram for explaining the principle of the communication line setting guarantee method according to the present invention, in which Fig. 1A shows the order of reservation applications, and Fig. 1B shows the number of vacant lines at the actual operating time. Figure 1C is a diagram showing the line allocation method at the actual operating time, Figure 1D
is a diagram showing a line allocation method when changes are made during actual operation. FIG. 2 is a diagram for explaining a reservation processing method based on the principle of FIG. 1, and FIG. 3 is an embodiment of the present invention. e ₁ , e ₂ , e ₃ , e ₄ ... terminal, f ₁ , f ₂ , f ₃ , f ₄ , f ₅ ... relay station, l ₁₂ , l 23 , l ₁₅ , l ₂₅ , _{l 24 ...} relay section, _f10 ,
f ₂₀ , f ₃₀ , f ₄₀ ...relay station, 10, 20, 30, 40
...Relay switch, 11,21,31,41...Relay switch controller, 51,52,53...Selected empty trunk line number, 60,61...Terminal, 62,6
3...Subscriber line, 70...Reservation center, 71...Terminal accommodation status file, 72...Route selection file, 73
...Line reservation status file, 74...Operation file,
75... Line control signal generator, 76... Reservation information input terminal, 77... Reservation availability information output terminal, 78... Reservation verification device, 81... Control line between reservation center and originating relay station, 82... Control line between relay stations .

Claims (1)

[Claims] 1. A terminal accommodating status file having means for searching for a relay station accommodating a terminal that requires setting up a communication line at a predetermined time, and communication between any two relay stations. A route selection file that has means for sequentially selecting connection routes for communication lines from those with the highest priority when performing line settings, and a means for recording and searching the number of vacant relay lines between each relay station at any given time. a line reservation status file with a line reservation status file, and a communication line connection route from the originating relay station to the terminating relay station for the accepted reservation;
An operation file having a means for recording and searching operational information consisting of an operation start time, an operation end time, a calling terminal name, a called terminal name, and a reservation identification code, and a calling terminal name input at the time of accepting a reservation; Based on the reservation information consisting of the name of the receiving terminal, the operation start time, and the operation end time, the transmitting relay station and the receiving relay station accommodating the transmitting terminal and the receiving terminal are selected based on the terminal accommodation status file, and the route selection is performed. The connection routes for communication line settings between the originating relay station and the terminating relay station are selected in descending order of priority based on the file, and the priority of the selected connection route is selected based on the line reservation status file. In order from highest to lowest, the presence or absence of idle relay lines in the time period from the start time to the end time of operation between all adjacent relay stations on the connection route is checked, and the number of relay lines between all adjacent relay stations on the connection route If it is confirmed that there is an idle line in the relay line, the connection route is set as the connection route of the reserved communication line, and the operation information for the reservation is recorded in an operation file;
means for reducing by 1 the number of vacant lines in the time period from the operation start time to the operation end time of the reservation between all the relay stations used for the reservation in the reservation status file, and means for detecting operational information and transmitting the operational information to the originating relay station before the operational start time; and according to the specified route under control from the originating relay station at the operational start time based on the operational information, Means for sequentially connecting the subscriber line to which the originating terminal is connected, each relay line between each relay station that is vacant at that time, and the subscriber line to which the receiving terminal is connected, starting from the originating relay station side. 1. A communication line reservation connection system comprising: and means for sequentially disconnecting corresponding subscriber lines and relay lines that have already been connected from the incoming relay station side at the end of operation time. 2. A terminal accommodating status file that has a means to search for a relay station that accommodates a terminal that requires communication line setup at a predetermined time, and a terminal accommodation status file that has a means to search for a relay station that accommodates a terminal that requires communication line setup at a predetermined time, and a A route selection file that has means for sequentially selecting communication line connection routes from those with the highest priority, and a line reservation status file that has means for recording and searching for the number of vacant relay lines between each relay station at any given time. and the connection route of the communication line from the originating relay station to the terminating relay station of the accepted reservation,
An operation file having a means for recording and searching operational information consisting of an operation start time, an operation end time, a calling terminal name, a called terminal name, and a reservation identification code, and a calling terminal name input at the time of accepting a reservation; Based on the reservation information consisting of the name of the receiving terminal, the operation start time, and the operation end time, the transmitting relay station and the receiving relay station accommodating the transmitting terminal and the receiving terminal are selected based on the terminal accommodation status file, and the route selection is performed. The connection routes for communication line settings between the originating relay station and the terminating relay station are selected in descending order of priority based on the file, and the priority of the selected connection route is selected based on the line reservation status file. In order from highest to lowest, the presence or absence of idle relay lines in the time period from the start time to the end time of operation between all adjacent relay stations on the connection route is checked, and the number of relay lines between all adjacent relay stations on the connection route If it is confirmed that there is an idle line in the relay line, the connection route is set as the connection route of the reserved communication line, and the operation information for the reservation is recorded in an operation file;
means for reducing by 1 the number of vacant lines in the time period from the operation start time to the operation end time of the reservation between all the relay stations used for the reservation in the reservation status file, and means for detecting operational information and transmitting the operational information to the originating relay station before the operational start time; and according to the specified route under control from the originating relay station at the operational start time based on the operational information, Means for sequentially connecting the subscriber line to which the originating terminal is connected, each relay line between each relay station that is vacant at that time, and the subscriber line to which the receiving terminal is connected, starting from the originating relay station side. and means for sequentially disconnecting the corresponding subscriber lines and relay lines that have already been connected from the incoming relay station side at the end of operation time. When changing, input the identification code of the existing reservation and the reservation information of the new reservation after the change, read the operation information of the previous reservation from the operation file based on the reservation identification code, and connect the relay line between each relay station of the new reservation. When checking whether there is a free line or not, increase the reservations between each relay station for the time period from the operation start time to the operation end time based on the operation information of the reservation, and check the number of calls between the originating relay station and the incoming call. If it is confirmed that there are free lines in the relay lines between all adjacent relay stations on the selected route between relay stations, record operation information regarding the route as a new reservation route in the operation file, and The value of the number of free lines in the line reservation status file between all relay stations used for the existing reservation in the time period from the operation start time to the operation end time of the existing reservation is increased by 1, and the value of the number of free lines is increased by 1. The value of idle lines in the time period from the operation start time to the operation end time of the new reservation between all relay stations used for
1. A communication line reservation connection method, comprising means for deleting the previously reserved operation information from an operation file by decrementing the already reserved operation information. 3. A terminal accommodating status file that has a means to search for relay stations that accommodate terminals that require communication line settings at a predetermined time, and a terminal accommodation status file that has a means to search for relay stations that accommodate terminals that require communication line settings at a predetermined time, and a A route selection file that has means for sequentially selecting communication line connection routes from those with the highest priority, and a line reservation status file that has means for recording and searching for the number of vacant relay lines between each relay station at any given time. and the connection route of the communication line from the originating relay station to the terminating relay station of the accepted reservation,
An operation file having a means for recording and searching operational information consisting of an operation start time, an operation end time, a calling terminal name, a called terminal name, and a reservation identification code, and a calling terminal name input at the time of accepting a reservation; Based on the reservation information consisting of the name of the receiving terminal, the operation start time, and the operation end time, the transmitting relay station and the receiving relay station accommodating the transmitting terminal and the receiving terminal are selected based on the terminal accommodation status file, and the route selection is performed. The connection routes for communication line settings between the originating relay station and the terminating relay station are selected in descending order of priority based on the file, and the priority of the selected connection route is selected based on the line reservation status file. In order from highest to lowest, the presence or absence of idle relay lines in the time period from the start time to the end time of operation between all adjacent relay stations on the connection route is checked, and the number of relay lines between all adjacent relay stations on the connection route If it is confirmed that there is an idle line in the relay line, the connection route is set as the connection route of the reserved communication line, and the operation information for the reservation is recorded in an operation file;
means for reducing by 1 the number of vacant lines in the time period from the operation start time to the operation end time of the reservation between all the relay stations used for the reservation in the reservation status file, and means for detecting operational information and transmitting the operational information to the originating relay station before the operational start time; and according to the specified route under control from the originating relay station at the operational start time based on the operational information; Means for sequentially connecting the subscriber line to which the originating terminal is connected, each relay line between each relay station that is vacant at that time, and the subscriber line to which the receiving terminal is connected, starting from the originating relay station side. and means for sequentially disconnecting the corresponding subscriber lines and relay lines that have already been connected from the incoming relay station side at the end of operation time, which has already been accepted. When canceling an existing reservation, based on the input reservation identification code, read the operation information of the reservation from the operation file, and cancel the operation information of the reservation in the time period from the operation start time to the operation end time of the reservation. A communication line characterized by having a means for increasing by 1 the value of the number of free lines in a line reservation status file between all used relay stations, and deleting the operation information of the already reserved lines in an operation file. Reserved connection method.