JP3317978B2 - Outgoing trunk group dispersion ratio setting method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for selecting a line in a telephone exchange, and more particularly to a detour control system for a line. Generally, telephone exchanges often use a plurality of devices for the same purpose repeatedly.However, in order to prevent a specific device from being deteriorated due to the frequency of use, a control method for selecting an average device is used. Needed.

In particular, an outgoing trunk (office line or dedicated line) of a telephone exchange is composed of a plurality of trunk groups for each route in the same direction.
Each trunk group needs to be used on average,
In order to avoid concentration of outgoing lines in one trunk group, the dispersion ratio of each trunk group is set, and the outgoing lines are sequentially and equally used by detour control.

[0003]

2. Description of the Related Art FIG. 4 shows a block diagram of a conventional line selection system based on a dispersion ratio. In the figure, reference numeral 21 denotes exchange A,
22 is a station data setting device, 23 is a calling subscriber, and 24 is a trunk group index.

The trunk group index 24 is composed of trunk groups a, b, c, d, and e. When a calling subscriber 23 calls, a line is selected according to the dispersion ratio of each trunk group. The number of lines in each trunk group is 10, 20, 30, 15,
Assuming that 25 lines total 100 lines, the maintenance person has set the dispersion ratio of each trunk group by the station data setting device 22 according to the number of lines. That is, if the dispersion ratio is set to 10: 20: 30: 15: 25 and the calls are simultaneously made for the same direction,
The exchange 21 distributes calls according to the dispersion ratio and selects a line. For example, if there are initially 20 simultaneous calls, the trunk group a has 2 lines, b has 4 lines, c has 6 lines,
d is sequentially selected as 3 lines, and e is sequentially selected as 5 lines. If there is a next call while each line is connected, the trunk group a is selected. select. Therefore, the usage rate of the trunk group a becomes high, and conversely, a case where another specific trunk group becomes vacant occurs. In addition, some lines have been used for a long time, and the usage rates of the trunk groups may be uneven. Therefore, there is a problem that a relatively used line is frequently used and an unused line remains idle.

[0005]

In the conventional detour control method, since the line is selected based on the line dispersion ratio, there is a problem that an unused line exists and the probability of a call loss at a high load increases. I was This is because the maintenance person initially sets a fixed dispersion ratio and selects a line with a fixed dispersion ratio,
Unequal line usage results and devices in a particular trunk group
(Hard) was abnormally frequently used, causing imbalance in the warranty period of the device.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a control method for calculating the dispersion ratio of line selection based on the use state (traffic) corresponding to the line and automatically setting the dispersion ratio in the currently used condition.

[0007]

FIG. 1 is a block diagram showing the principle of the present invention. In the figure, 1 is an exchange, 2 is usage status observation data provided in a memory unit of the exchange, 3 is equipment data, 4 is a dispersion ratio calculation logic unit provided in a processing unit, 5 is a distribution ratio automatic updating unit, 6 Indicates a calling subscriber, and 7 indicates a trunk group index.

The calling subscriber 6 sequentially selects an outgoing line from each trunk group of the trunk group index 7 at the time of calling according to the dispersion ratio and performs outgoing connection. The trunk group index 7 is composed of a plurality of trunk groups of trunk groups a, b, c, d and e. Each trunk group is composed of an individual number of line groups. The group is monitoring the line usage. The equipment data 3 stores the number of lines installed in each trunk group. In the present invention, the dispersion ratio calculation logic unit 4 of the processing unit monitors the usage status observation data 2 to determine a dispersion ratio correction value for each line, and the dispersion ratio automatic updating unit 5 determines the correction value of each line. If the correction value exceeds a specified value, the correction is automatically made to a new dispersion ratio.

[0009]

FIG. 2 shows a processing flowchart of the present invention. FIG. 4A shows the distribution ratio calculation logic means 4 and FIG. 4B shows the distribution ratio automatic updating means 5.

The distribution ratio calculation logic means shown in FIG. 3A stores the number of trunk groups of the trunk group index 7 and the number of lines of each trunk group in the facility data 3, and calculates the ideal usage rate of each trunk group. Can be set. The ideal usage rate X is a situation in which each trunk group is used at an equal usage rate, and ideally, all traffic is equal to 5 trunk groups.
The value is divided by the group. In the usage status observation data 2, the traffic volume per unit time of each trunk group is measured.
The traffic volume per line is calculated from this traffic volume, and the usage rate Y per line per unit time of each trunk group is calculated from all traffic. The dispersion ratio correction value Z = (X / Y) for each trunk group is determined by dividing the ideal usage ratio X calculated in the above by the usage ratio Y of each trunk group calculated in the above.

The distribution ratio automatic updating means shown in FIG. 2B determines the correction value Z for each trunk group, and checks whether the correction value has become equal to or more than the specified value of the correction value Z set in the above. If the correction value is judged to be greater than or equal to the specified value, a new dispersion ratio is calculated by multiplying the existing dispersion ratio by the correction value set in, and the dispersion ratio of each trunk group is set with the new dispersion ratio. To perform detour control. If the correction value is within the specified value, the detour control is performed based on the original correction value, that is, the dispersion ratio calculated from the number of lines for each conventional trunk group.

Even when the number of lines is changed by a maintenance person, the distribution ratio is automatically set by the automatic distribution ratio updating means, so that maintenance work can be reduced and data setting can be reduced. Can be prevented.

[0013]

FIG. 3 shows an embodiment of a calculation structure according to the present invention. FIG. 1A shows a block diagram, and FIG. 1B shows the relationship between a correction value and a specified value. In FIG. 1A, reference numeral 11 denotes an exchange,
12 is the calling subscriber, 13 is the trunk group TGNa, 14 is the trunk group
TGNb, 15 indicates a trunk group TGNc, and 16 indicates a trunk group TGNd. The figure shows a case where the trunk group index (TGX) consists of four trunk groups (TGN). 1. Equipment data (1) Number of TGNs in TGN = 4 (2) Number of lines in TGN is TGNa = 10, TGNb = 20, TGNc = 3
0, TGNd = 40. 2. Measurement data (3) Assume that the traffic (erlang) for each TGN is measured as follows.

2. TGNa = 40, TGNb = 30, TGNc = 20, TGNd = 10 Calculation data (4) Ideal value = 100/4% = 25% (5) Traffic volume per line per TGN TGNa = 40/10 = 4 = Ca, TGNc = 20/30 = 0.67 = Cc TGNb = 30 / 20 = 1.5 = Cb, TGNd = 10/40 = 0.25 = Cd (6) Usage rate of each TGN TGNa = Ca / (Ca + Cb + Cc + Cd) = 62.3% TGNb = 23.3%, TGNc = 10.4%, TGNd = 3.9% (7) Correction value TGNa = (4) / (6) = 0.42, TGNb = 1.07, TGNc = 2.4
0, TGNd = 6.41 (8) Old dispersion ratio TGNa: TGNb: TGNc: TGNd = 1: 2: 3: 4 (9) New dispersion ratio TGNa: TGNb: TGNc: TGNd = 1 × 0.42: 2 × 1.07: 3 × 2.
40: 4 × 6.41 = 0.42: 2.14: 7.20: 25.64 = 1: 5: 1
7:61 In the relationship between the correction value and the specified value in FIG.
It is only TGNb = 1.07 that the correction value of the term is within the specified value of 1.5 to 0.5, and the other TGNa = 0.42, TGNc = 2.40, TG
Since Nd = 6.41 is out of the range of the specified value, it is necessary to correct the dispersion ratio at this point, and the old dispersion ratio is corrected to the new dispersion ratio. If at least one of the trunk groups is out of the specified range, all the trunk groups are corrected to the new dispersion ratio. Since this correction is monitored for each unit time (α), the dispersion ratio of line selection is always calculated from the use situation (traffic) corresponding to the line, and the detour control is performed while automatically setting the dispersion ratio currently used. be able to.

[0015]

According to the present invention, since the dispersion ratio is updated according to the actual line use situation, the frequency of use of the apparatus becomes constant, and a stable equipment state can be provided.

Further, even when the number of apparatuses is changed by a maintenance person, the dispersion ratio is automatically set according to the present invention, so that maintenance work can be reduced, and data setting omission can be prevented.

[Brief description of the drawings]

FIG. 1 is a diagram showing the principle configuration of the present invention.

FIG. 2 is a processing flowchart of the present invention.

FIG. 3 shows an embodiment of a calculation configuration according to the present invention.

FIG. 4 is a block diagram of a conventional example.

[Explanation of symbols]

 1,11,21 Switch 2 Usage observation data 3 Equipment data 4 Dispersion ratio calculation logic means 5 Dispersion ratio automatic updating means 6,12,23 Outgoing subscriber 7,24 Trunk group index 13,14,15,16 Trunk group 22 Station data setting device

──────────────────────────────────────────────────続 き Continuing on the front page (72) Katsuharu Onijima 3-9-1, Shin Yokohama, Kohoku-ku, Yokohama-shi, Kanagawa Prefecture Inside Fujitsu Communication Systems Limited (72) Koji Yamamoto Shin-Yokohama, Kohoku-ku, Yokohama, Kanagawa Prefecture No. 9-18 Fujitsu Communication Systems Co., Ltd. (72) Inventor Koichi Tateishi 3-9-18 Shin-Yokohama, Kohoku-ku, Yokohama-shi, Kanagawa Prefecture Inside Fujitsu Communication Systems Co., Ltd. (56) References JP-A-70192 (JP, A) JP-A-63-74357 (JP, A) JP-A-2-95096 (JP, A) JP-A-57-3492 (JP, A) JP-A-3-82296 (JP, A) ) Hikaru 1-107280 (JP, U) Tokuyo Sho 59-501931 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H 04Q 3/64-3/68 H04M 3/00 H04Q 3/545 H04Q 3/76-3/78

Claims (1)

(57) [Claims] 1. An occurrence in a plurality of outgoing trunk groups of a telephone exchange
This method sets the distribution ratio, which is the ratio for distributing calls.
In the memory unit of the telephone exchange , the line use status, which is the monitoring result of the line use status of each trunk group , is stored.
Status observation data and the number of lines installed in each trunk group
And a processing unit of the telephone exchange for calculating a dispersion ratio for each trunk group from the equipment data.
Generated calls are distributed to each trunk group according to the dispersion ratio calculation logic means and the calculated dispersion ratio
And the dispersion ratio automatic updating means set in the telephone exchange as described above.
And the dispersion ratio calculation logic means further includes the line use status observation data.
The distribution ratio correction value for each trunk group is determined based on the data, and the distribution ratio automatic updating means further performs each transaction for each unit time.
Judge the correction value of the dispersion ratio for the
If the value exceeds the value, the variance ratio is automatically corrected.
Outgoing trunk group dispersion ratio setting method .