JPS59186459A - Bi-directional circuit operating method - Google Patents

Abstract

PURPOSE:To obtain a bi-directional circuit operating means which hardly acquires a circuit double and uses circuits uniformly by shifting the selection order of the acquisition of a free circuit between both exchanges by >=1 from each other. CONSTITUTION:When an exchange A(1a) uses the circuit with a circuit number 3, both exchanges A(1a) and B(1b) give new idle order numbers (1), (2), and (3) to circuits with circuit numbers (1), (5), and (6); and those circuits are given selection order numbers (1), (2), and (3) by the exchange A(1a) and selection order numbers (3), (1), and (2) by the exchange B(1b). As another example, when the circuit having a circuit number (2) becomes free, the circuits having circuit numbers (3), (1), (5), (6), and (2) are given idle order numbers (1), (2), (3), (4), and (5) newly by both exchanges A(1a) and B(1b), and those circuits are further given selection order numbers (1), (2), (3), (4), and (5) by the exchange A(1a) and selection order numbers (5), (1), (2), (3), and (4) by the exchange B(1b). Therefore, double acquisition never occurs unless the number of calls exceeds the total number N of circuits in a group 5.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a continuous use method for avoiding double capture of multiple lines operated in both directions between opposing exchanges in a telephone exchange or the like.

A conventional method of this kind will be explained with reference to FIGS. 1 and 2.

In Figure 1, (La) is exchange A, ([b) is exchange B opposite exchange A (La), (2a), (2b
) are the main communication path devices of exchange A (la) and exchange B ([b), (3a), (3b) are the central processing units of exchange A (l) and exchange B (lb, l), (4a), ( 4b
) is the storage device of exchange A (la) and exchange B (lb), and (5) connects both exchanges (La) and (Lb), and both ends are accommodated in main channel equipment (2a) and (2b). This is a group of bidirectional lines.

Figure 2 is a diagram showing an example of the storage contents of the storage device (4s, (4b)) when the number of lines in the bidirectional line group (5) is 1'1J=6. This is the physical number of each line in group (5), and the lines with the same number in (4a)' and (4b) indicate the same physical line, and the "vacant 1a sequential number" is "0" is displayed for lines that are in use, and "0" is displayed for idle lines in the order in which they become free.
They are numbered sequentially starting with [].

Next, the operation will be explained. Now, when a call occurs at exchange A (la), the central processing unit (3a) sends a call to the storage device (4a).
), the line is selected according to the selection order number stored in ). When a call occurs at exchange B (Lb), a line is similarly selected according to the selection order number in the storage device (4b).

Depending on the selection sequence number, exchange A (la) and exchange B (lb) may seize the same line at the same time (double seize) even though there are other vacant lines in the building.
To avoid this, in the conventional system, as shown in Figure 2, both exchanges A and A
, B (ta), and (Lb) are assigned selection order numbers in reverse order. In the example in Figure 2,
Line selection when a call occurs is line number 3 in exchange A (la). L, 5°6, switch B (lb) has line numbers 6,5. L.

Select in order of 3. For example, if the line with line number 3 is used at exchange A (l) from the state shown in Figure 2, then both exchanges A
, B (LaXLb) creates a new free sequence number [.

2.3, and for the above line number 5.6, exchange A (la) has a selection order number.

2.3, in exchange B (1b), selection order number 3, 2
゜Include ■. For example, if the state shown in the same figure or line number 2 is
When the line becomes a vacant VC, the line number 3L1.5.6
．． For the line No. 2, both exchanges A and B (LaXLb) search for new vacant sequence numbers of 2, 3, and 4.5°, and then exchange A (la) selects selection sequence numbers of 1≠ and 2.3. .4.5 with selection order number 54.3 on switch B.
, 2.1 is attached.

By doing the above, double capture will not occur unless the number of calls occurring on line group (5) connecting both exchanges Qa) and (Lb) exceeds the number of foot lines of line group (5). . Further, if the call volume is sufficiently large and the number of simultaneous connections of lines in line group (5) is sufficiently large, the frequency of use of each line is equalized. If there is no other option than to do so (i.e., when the call currently in use ends and the line becomes "free", all lines will be "free").
When the line is marked as "free" and marked with 1, when it changes from "in use" to "free", it will always be given the selection order number 1 again, and lines with other line numbers will not be used. It's going to happen.

Since the conventional bidirectional line operation method is performed as described above, the line may not be used evenly, which has the disadvantage that the line is unevenly consumed.

This invention was made in order to eliminate the above-mentioned drawbacks of the conventional system, and by shifting the selection order for seizing vacant lines in both exchanges by one or more from each other, double seizing of lines is less likely to occur, and DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Third
The figure shows an example of the memory contents of the memory devices (4a) and (4b) when the number of lines N=6 in the bidirectional line group (5). It's the same thing. The "selection sequence number" is the same as the conventional method in exchange A (l), but in exchange B (lb>), the selection sequence number is set according to the idle sequence number from the line with the idle sequence number 2 [, 2, 3, .
. . . 1 is attached, and the last selection order number is attached to the line with the vacant order number [.

For example, if the line with line number 3 is used in exchange A (la) in the state shown in Figure 3, the lines with line numbers 1, 5, 6 are newly available in both exchanges A and B (taXlb). For these lines, exchange A (1) has selection sequence number 1.2.3, and exchange B (lb) has selection sequence number 3.L.

Add 2. As another example, if the line with line number 2 becomes idle from the state shown in Figure 3, line number 3, L
, 5.6.2 for both exchanges A.

B (La) (Lb) new vacant sequence number, 2, 3
．． 4.5, and exchange A (
In exchange B (lb), the selection order numbers are 2.3, 4, and 5, and in exchange B (lb), the selection order numbers are 5. Attach L, 2, 3.4.

When a new call occurs in exchanges A (la) and B (lb), the line is selected and captured according to the selection order number, as in the conventional system.

In the non-implemented method described above, both exchanges A (la) +
The number of calls occurring on line group (5) connecting B (lb) is i
It is clear that the synchronization does not occur unless the number of lines at the base of line group (5) exceeds N. In addition, if the call volume is small, for example, when the call currently in use ends and the line becomes free, all lines will become "free", and that line will be "free".
Even if no new calls occur before , and new calls originate only from exchange B (Ib), the line used by exchange B (lb) with selection order number 1 is this one. When it changes from "in use" to "vacant",
A selection order number other than [[] will be assigned, so the frequency of line use will not be concentrated on one line. - It is clear that when the call volume is large, the lines are used evenly as in the conventional system.

In the above embodiment, the selection order of exchange A (la) is shifted by E and the selection order of exchange B (lb) is changed to
We have explained the case where switch B (lb)
As for the selection order, the selection order may be changed to switch A (the selection order may be shifted by two or more).

As described above, according to the bidirectional line operation method according to the present invention, the selection order of vacant lines in both exchanges is
Since the configuration is such that the lines are shifted as described above, there is an effect that double capture of the line is less likely to occur and the lines can be used equally.

[Brief explanation of the drawing]

Figure 3 is a block diagram showing an example of the configuration of opposing exchanges;
FIG. 2 is a diagram showing an example of the storage contents of a conventional storage device, and FIG. 3 is a diagram showing the storage contents of the storage device for explaining a bidirectional line operation method according to an embodiment of the present invention. ([su...-10,000 exchanges, ([b)...other exchange, (4a)...-10,000 exchanges memory H5, (4b)
. . . Memory of the other exchange -ii, (5) -- Bidirectional line group. In addition, in the figures, the same reference numerals indicate the same or equivalent parts. Agent Masuo Oiwa Figure 1 Figure 2

Claims (1)

[Claims] (1) In a bidirectional circuit operation method for determining the selection order for acquiring circuits between two exchanges connected by multiple circuits operated in both directions, the order in which circuits become available in -10,000 exchanges is is the above selection order, and in the other exchange, the selection order of the -10,000 exchanges is L
A bidirectional line operation method characterized in that the selection order is shifted by the above.