JPS6086958A - Circuit sharing system - Google Patents

Abstract

PURPOSE:To ensure the communication of an instantaneous connection call for a fixed period of time by limiting the reservation enable time point of a reserved connection call to the time preceding the communication starting time point by a fixed period of time. CONSTITUTION:The reserving state of the reserved calls is shown in an oblique line area A, and the communication assurance time of an instantaneous call, i.e., the reservation inhibiting time of the reserved call is set at T. Under such conditions, the number of instantaneous connection circuits of a present time point (t) is equal to the value (c-b) obtained by subtracting the reservation connection circuit number (b) of the point (t) from the using circuit number (c) of the point (t). No reservation is permitted during the time T and therefore the number of reserved circuits does not exceed the maximum reserved circuit number (d) within the time T at the point (t) during the time T. Therefore the maximum circuit number (e) which can be connected instantaneously at the point (t) is shown as e=a-(c-b)-d. Thus it is possible to assure the communication during the time T as long as f<=e is satisfied [f: using frequency of instantaneous calls at the point (t)].

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical field to which the invention pertains] The present invention relates to a line sharing system for sharing lines between immediate calls and reserved calls in a switched network.

If you use a connection line on a switched network for videophone calls, etc., even if you try to connect the line immediately at the time of the conference, the line may be blocked and the conference cannot be held. If you want to be sure, it is best to reserve the line in advance. Reserving a line is effective not only for conference calls but also for ensuring that calls can be made at the scheduled time.

Under these circumstances, the switching network has line equipment that can be used for immediate connection and line equipment that can be used for reserved connection, but the present invention shares these and allows both line equipment to be used according to the traffic for instant connection or reserved connection. This relates to a line sharing system that allows for flexibility between facilities at any time.

[Prior art and its problems]

Conventional line sharing system (for example, Japanese Patent Application No. 58-117
(Refer to No. 100), when connecting an immediate connection call, the connection is made only by checking that the current line is empty, so if the number of reserved connection calls increases after that, it is not possible to process the reserved connection calls as call losses. It was necessary to disconnect the immediate connection call and reconnect the reserved connection call.

Therefore, there is a possibility that the immediate connection call is disconnected by the always reserved connection call, and there is a drawback that the communication time of the immediate connection call cannot be guaranteed.

[Purpose of the invention]

The present invention has been made to solve the above-mentioned drawbacks of the prior art, and therefore, an object of the present invention is to provide a line sharing method that can guarantee the communication time of an instant connection call. be.

[Key points of the invention]

The main point of the present invention is that, in the line sharing system, the time at which reserved connection calls can be reserved is limited to a certain period of time before the communication start time, thereby guaranteeing the communication time for immediate connection calls for a certain period of time. It is in.

[Embodiments of the invention]

Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a time chart of a line sharing system based on the present invention. In the figure, the shaded area A indicates the reservation status of reserved calls, t indicates the current time, T indicates the guaranteed communication time for immediate calls (in other words, the reservation prohibited time for reserved calls), and a indicates immediate/reserved calls. b is the number of reserved connection lines at the current time t, C is the number of lines in use at the current time t, d is the maximum number of lines reserved within one hour, and e is the current number of lines to be reserved. Each shows the maximum number of lines that can be immediately connected at time t.

The number of immediately connected lines at the current time t is the value obtained by subtracting the number of reserved lines at the time from the number of used lines C at the time, that is, (c-b). Since reservations are prohibited during time T, the number of reserved lines within one hour will not exceed the maximum number of reserved lines d within one hour at one time. Therefore, the maximum number of lines e that can be instantly connected at one time is 1 from the total number of lines a.
The value obtained by subtracting the number of immediately connected lines at the time (c-b) and the maximum number of reserved lines d within one hour, that is, e = a
-(c-b)-d=a+b-c-d...
(1) becomes. Therefore, if the number f of lines in use for an immediate call made at one time is f≦e, communication for that immediate call is guaranteed for one hour.

FIG. 2 is a block diagram showing one embodiment of the present invention.

In the figure, 1 is a reservation center, 2 and 34 are exchanges, 5 is a reservation control unit, 6 is a line reservation status file, and 7 is a reservation center.
is a signal device, 8, 11.14 are communication path devices, 9
, 12 and 15 are control devices, 10, 13 and 16 are line connection status files, 17 are communication lines between the expansion switch and the reservation center, 18 and 19 are terminals, respectively.
0.21 is a line group between each exchange.

When the exchange 2 receives an immediate call request from the terminal 18, the number of reserved connection lines at one time in the line group 20 is d. 17, the reservation control unit 5 searches the line reservation status file 6 for the value of the maximum number of reserved lines d within the next hour, where d is the number of reserved lines at the time, and the signal The device 72 notifies the exchange 2 through the communication circuit 17.

The control device 9 of the exchange 2 searches the line connection status file 10 for the number C of lines 20 in use at time t, calculates the maximum number e of lines that can be immediately connected at time t according to equation (1) above, and makes an immediate call. If the number f of lines to be used requested by is f≦e, the communication path device 8 is controlled and the line 20 is connected.

Exchanges 6 and 4 perform similar operations and immediately connect terminals 1 and 19. If the line connection status file 1° can record the number of immediately connected lines (c-b) at the time, there is no need to notify the exchange of the number of reserved and connected lines at the time from the line reservation status file 6. .

〔Effect of the invention〕

As explained above, according to the present invention, the time when a reserved call can be reserved is set before a certain time before the start of communication, and the reservation is prohibited during the certain time, so that the reserved call and the line can be reserved. This has the advantage that the communication time for shared instant calls can be guaranteed for a certain period of time. Further, the logic for calculating the number of lines to be immediately connected can be achieved using relatively simple logic, and the control of the exchange can be accomplished by simply adding a few functions to the conventional line selection function.

[Brief explanation of the drawing]

FIG. 1 is a time chart of the mouth-feel sharing method based on the present invention, and FIG. 2 is a block diagram showing an embodiment of the misfire j.
It is. Code explanation t...Current time, T...Guaranteed communication time for immediate calls (reservation prohibited time for reserved calls), a...
The number of twisted lines, b... is the number of reserved connection lines at time,
C... is the number of lines in use at the time, d...
・・Maximum number of reserved lines within 1 hour, e・・・・・・
Maximum number of lines that can be instantly connected at the time, 1...Reservation center, 2.3, 4...Exchange, 5...°.
...Reservation control unit, 6...Touch reservation status file, 7...Signal device, 8, 11, 14...
...Communication path device, 9,12,15...Control device, 10゜15.16...Line connection status file, 17...Communication line, 18.19.・・・・・・
Terminal, 20, 21...Line group, Agent Patent attorney Akio Namiki Agent Patent attorney Kiyoshi Matsuzaki

Claims (1)

[Scope of Claims] 1) In a switching network having a line shared for immediate connection and reserved connection, a reservation center for line reservation, and an exchange for line connection, the guaranteed communication time for immediate connection calls is fixed. A line reservation status file is created in which the number of lines reserved at each time is recorded and searchable by restricting the time to time T and prohibiting the time when reservation connection calls can be made for at least one hour before the communication start time. , has a line connection status file that allows you to record and search the current number of lines in use,
Displays the current number of reserved connection lines when requesting an immediate connection. Maximum number of reserved lines d for one hour from now. Current number of lines in use C (or current number of instant connection lines (c-
bL A line sharing method characterized in that the current number of lines that can be immediately connected is calculated from the maximum number of reserved lines d) within one hour from the current time, and immediate connection is performed based on the calculated number.