JP3651436B2 - Mobile communication system and load balancing method used therefor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mobile communication system and a load distribution method used therefor, and more particularly, to a load distribution method among a plurality of exchanges constituting a mobile communication system.
[0002]
[Prior art]
Conventionally, in a mobile communication system, as shown in FIG. 3, a mobile terminal 3, a radio base station 2, and an exchange 4 are configured. The switching center 4 also sends a plurality of exchanges 11 to 13 for performing call processing, a subscriber database 16 storing subscriber information, and a registration request from the mobile terminal 3 to implement load balancing. To the sorting device 14 that sorts the items to.
[0003]
In the above mobile communication system, unlike the fixed communication network or the like, when the mobile terminal 3 has moved to the area of the radio base station 2, the mobile terminal 3 is registered in the exchange 4. The mobile terminal 3 makes a call to another terminal or a public line via the exchange 4 through this registration. Conversely, when there is a call connection request from another terminal or public line to the switching center 4, an incoming call is made to the mobile terminal 3 through this registration. Hereinafter, registration of the mobile terminal 3 to the exchange 4 will be described with reference to FIG.
[0004]
The registration request is issued from the mobile terminal 3. When the mobile terminal 3 is turned on, the mobile terminal 3 sends a registration request to the radio base station 2 periodically or when the mobile terminal 3 moves in the area of the radio base station 2 (B1 in FIG. 4). The wireless base station 2 transfers the registration request to the switching center 4, and when the switching center 4 receives the registration request, it first causes the distributor 14 to perform processing (B2 in FIG. 4).
[0005]
The distribution device 14 monitors the load status of a plurality of exchanges 11 to 13 in the exchange 4, and selects, for example, the exchanges 11 to 13 having the lowest call processor usage rate (B3 in FIG. 4), and the mobile unit. The registration request of the terminal 3 is transferred to the selected exchanges 11 to 13 (B4 in FIG. 4).
[0006]
Upon receiving the registration request, the exchanges 11 to 13 inquire of the subscriber database 16 about the subscriber information for using the mobile terminal 3 (B5 in FIG. 4), and the subscriber information sent from the subscriber database 16 is automatically obtained. The information is stored in a memory (not shown) (B6 in FIG. 4), and the call control is performed using the subscriber information (B7 in FIG. 4).
[0007]
When the registration request is assigned to the exchanges 11 to 13, the mobile terminal 3 is turned off, moved to another area, etc., and the same exchanges 11 to 13 are used until the registration is canceled. .
[0008]
As for the selection of the exchanges 11 to 13 in the distribution device 14, a method of assigning call processors so that the usage rate is averaged with respect to registration requests as in the method disclosed in Japanese Patent Laid-Open No. 10-56670. There is.
[0009]
[Problems to be solved by the invention]
In the conventional mobile communication system described above, when load sharing is performed among a plurality of exchanges, the assignment of the exchanges is determined according to the load situation at the time when the registration request reaches the exchange.
[0010]
However, since the time at which a registration request is generated from a mobile terminal is different from the time at which the mobile terminal has an incoming / outgoing call, even a switch having a low load at the time of registration may concentrate the load at the incoming / outgoing call. . Since it is configured so that the use of the exchange is restricted in the event of an overload, the regulation is frequently triggered if the load is biased, and the use efficiency is poor, preventing stabilization and high-speed processing. There's a problem.
[0011]
Accordingly, an object of the present invention is to provide a mobile communication system capable of solving the above-described problems and operating the switching system stably and at high speed, and a load distribution method used therefor.
[0012]
[Means for Solving the Problems]
A mobile communication system according to the present invention is a mobile communication system that distributes a registration request from a mobile terminal sent via a radio base station to one of a plurality of exchanges using a distribution device,
Predicting means for predicting at least one of the call volume of the mobile terminal and the most busy time in which call processing is frequently performed, and selecting one of the plurality of exchanges based on the prediction result to the distribution device Screening means for notification ,
The prediction means derives the most busy time from the call history of the mobile terminal,
The sorting means sorts the exchange so that the most busy time does not overlap .
[0013]
A load distribution method according to the present invention is a load distribution method for a mobile communication system that distributes a registration request from a mobile terminal sent via a radio base station to one of a plurality of exchanges using a distribution unit,
Predicting at least one of the call volume of the mobile terminal and the most busy time in which call processing is frequently performed, and selecting one of the plurality of exchanges based on the prediction result to the distributor And a step of notifying ,
The step of performing the prediction derives the most busy time from the call history of the mobile terminal,
In the sorting step, the exchanges are sorted so that the most busy time does not overlap .
[0014]
That is, the mobile communication system of the present invention is characterized in that the distribution unit performs allocation to a plurality of exchanges based on predictions such as the call volume of the mobile terminal and the most busy time.
[0015]
The sorter inquires the call history to the subscriber database, derives the most busy time, assigns it so that the most busy times do not overlap, and determines the location of the mobile terminal registration and the moving speed of the mobile terminal. The behavior pattern is predicted, the call volume is derived, and allocation is performed so that the average of the total call volume per switch is small.
[0016]
As described above, in the mobile communication system of the present invention, the distributor distributes the load of a plurality of exchanges while predicting the usage rate of the call processor, that is, based on the predicted load, not the load at the time of registration. Thus, the load distribution of a plurality of exchanges is performed, so that the exchange system can be operated stably and at high speed.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a mobile communication system according to an embodiment of the present invention. 1, the mobile communication system according to one embodiment of the present invention has the same configuration as the conventional mobile communication system shown in FIG. 3 except that an exchange usage rate predictor 15 is added in the exchange 1. The same components are denoted by the same reference numerals. The operation of the same component is the same as that of the conventional example.
[0018]
The mobile communication system according to one embodiment of the present invention includes a mobile terminal 3, a radio base station 2, and an exchange 1. In addition, the switching center 1 sends a plurality of exchanges 11 to 13 for performing call processing, a subscriber database 16 storing subscriber information, and a registration request from the mobile terminal 3 to implement load balancing. ˜13, and a switching device usage rate predictor 15 is arranged.
[0019]
In the above mobile communication system, unlike the fixed communication network, when the mobile terminal 3 moves to the area of the radio base station 2, the mobile terminal 3 is registered in the exchange 1. The mobile terminal 3 makes a call to another terminal or a public line via the exchange 1 through this registration. Conversely, when there is a call connection request from another terminal or public line to the switching center 1, an incoming call is made to the mobile terminal 3 through this registration.
[0020]
The exchange usage rate predictor 15 receives the call history from the distributor 14, derives the most busy time of the exchanges 11 to 13, and selects the exchanges 11 to 13 so that the most busy times do not overlap in the exchanges 11 to 13. The sorting result is notified to the sorter 14.
[0021]
FIG. 2 is a sequence chart showing the registration operation of the mobile terminal 3 in the mobile communication system according to one embodiment of the present invention. The registration operation of the mobile terminal 3 in the mobile communication system according to one embodiment of the present invention will be described with reference to FIG. 1 and FIG.
[0022]
When the mobile terminal 3 is turned on, the mobile terminal 3 sends a registration request to the radio base station 2 periodically or when the mobile terminal 3 moves in the area of the radio base station 2 (A1 in FIG. 2). The wireless base station 2 transfers the registration request to the switching center 1, and when the switching center 1 receives the registration request, it first causes the distributor 14 to perform processing (A2 in FIG. 2).
[0023]
The sorter 14 inquires the call history of the subscriber database 16 (A3 in FIG. 2). When the call history is received from the subscriber database 16 (A4 in FIG. 2), the call history is transferred to the exchange usage rate predictor 15 (see FIG. 2). A5 in FIG.
[0024]
The exchange usage rate predictor 15 derives the most busy time (the time during which call processing is frequently performed in the exchanges 11 to 13) based on the call history delivered from the distribution device 14 (A6 in FIG. 2), and the most busy time. The exchanges 11 to 13 are sorted so as not to overlap (A7 in FIG. 2), and the sorting result is notified to the sorter 14 (A8 in FIG. 2).
[0025]
Here, the sorter 14 inquires about the call history of the mobile terminal 3, and based on the received call history, at least one of the time zone in which the mobile terminal 3 may be used and the frequency of use for each time zone. The registration of the mobile terminal 3 may be distributed to the exchanges 11 to 13 based on the derived information and the distribution status in the exchanges 11 to 13.
[0026]
The sorter 14 transfers the registration request for the mobile terminal 3 to the sorted exchanges 11 to 13 using the result sorted by the exchange usage rate predictor 15 (A9 in FIG. 2). Upon receiving the registration request, the exchanges 11 to 13 inquire the subscriber database 16 about the subscriber information using the mobile terminal 3 (A10 in FIG. 2), and store the subscriber information from the subscriber database 16 in its own memory ( (A11 in FIG. 2) and call control is performed using the subscriber information (A12 in FIG. 2).
[0027]
Thus, in this embodiment, since the load distribution of the exchanges 11 to 13 is performed based on the predicted load, not the load at the time of registration of the mobile terminal 3 in the exchanges 11 to 13, the stability of the exchange system is improved. And speeding up can be achieved.
[0028]
In this embodiment, the exchanges 11 to 13 are selected based on the most busy time. In addition, the behavior pattern is predicted from the position where the registration of the mobile terminal 3 is issued, and the prediction result is used. It is possible to derive the call volume and perform selection so that the average of the call volume sums per exchanges 11 to 13 becomes small.
[0029]
For example, if the mobile terminal 3 is registered from the city, the type is classified as “mobile type”, and if the mobile terminal 3 is registered from the company, the type is “attended”. If the mobile terminal 3 is “mobile type”, registration requests frequently occur along with the movement, but the call frequency while moving is low, so it is predicted that the call volume is not large. On the contrary, it is predicted that the call volume will increase in the “attended type”.
[0030]
Thus, in this embodiment, since the prediction using the location information in which the mobile terminal 3 is registered can be performed in addition to the information such as the call history, the accuracy can be improved, and as a result, the load distribution effect is enhanced. be able to.
[0031]
Further, in this embodiment, in addition to the most busy time, an action pattern is predicted from the moving speed of the mobile terminal 3, a call volume is derived, and selection is performed so that the average of the total call volume per switch is reduced.
[0032]
For example, when the vehicle is moving at high speed, the behavior pattern that the vehicle is moving is predicted. If the subscriber is set so as to be able to restrict incoming calls while on board, he / she is assigned to an exchange with a high possibility of activation.
[0033]
Thus, in this embodiment, since prediction using the subscriber's behavior pattern in addition to information such as the call history can be performed, the accuracy can be improved, and as a result, the load distribution effect can be enhanced.
[0034]
On the other hand, in this embodiment, in addition to the call history of the mobile terminal 3, for example, the call history of the past year, the call history of the past month, or the call history of the past week is statistically processed in the subscriber database 16. It is also possible to accumulate the frequency of use for each time zone in each day or day of week obtained, and the distribution device 14 can distribute the registration request of the mobile terminal 3 to the exchanges 11 to 13 based on the information.
[0035]
In this case, not only the mobile terminal 3 but also the load status for each time zone for each day or day of the week obtained by statistically processing the status of call processing in the exchanges 11 to 13 is stored in the subscriber database 16. The sorter 14 can sort the registration request of the mobile terminal 3 to the exchanges 11 to 13 based on the information.
[0036]
【The invention's effect】
As described above, the present invention is a mobile communication system in which a registration request from a mobile terminal sent via a radio base station is distributed to one of a plurality of exchanges by a distribution unit. Stable and high-speed switching system by predicting at least one of the most busy time when volume and call processing are frequently performed, and selecting one of a plurality of switches based on the prediction result and notifying the distributor The effect that it can be operated is obtained.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a mobile communication system according to an embodiment of the present invention.
FIG. 2 is a sequence chart showing a registration operation of a mobile terminal in a mobile communication system according to an embodiment of the present invention.
FIG. 3 is a block diagram showing a configuration of a mobile communication system according to a conventional example.
FIG. 4 is a sequence chart showing a registration operation of a mobile terminal in a mobile communication system according to a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Switching station 2 Wireless base station 3 Mobile terminal 11-13 Switching machine 14 Sorting machine 15 Switching machine usage rate prediction machine 16 Subscriber database

Claims (10)

A mobile communication system that distributes a registration request from a mobile terminal sent via a radio base station to one of a plurality of exchanges using a distribution machine,
Predicting means for predicting at least one of the call volume of the mobile terminal and the most busy time in which call processing is frequently performed, and selecting one of the plurality of exchanges based on the prediction result to the distribution device possess and selection means to be notified,
The prediction means derives the most busy time from the call history of the mobile terminal,
The mobile communication system , wherein the sorting means sorts the exchanges so that the most busy times do not overlap . The prediction means derives the call volume based on location information where the mobile terminal is registered,
2. The mobile communication system according to claim 1 , wherein the selection means performs selection such that an average of the total call volume per the exchange is reduced. 3. The mobile communication system according to claim 1 , wherein the predicting unit derives presence / absence of call restriction from an action pattern predicted from a moving speed of the mobile terminal. Said predicting means, claims 1 to 3, characterized in that from the results of statistical processing for past call history of the mobile terminal has to perform at least one of prediction of the traffic intensity and the busy hour time The mobile communication system according to any one of the above. It said predicting means, according to claim claim 1, characterized in that from the results of statistical processing for past load status of the plurality of exchanges each have to perform at least one of prediction of the traffic intensity and the busy hour time 5. The mobile communication system according to any one of 4 . A load distribution method for a mobile communication system in which a registration request from a mobile terminal sent via a radio base station is distributed to any of a plurality of exchanges by a distribution unit,
Predicting at least one of the call volume of the mobile terminal and the most busy time in which call processing is frequently performed, and selecting one of the plurality of exchanges based on the prediction result to the distributor It possesses a step of notification,
The step of performing the prediction derives the most busy time from the call history of the mobile terminal,
The load balancing method characterized in that in the step of performing the sorting, the exchanges are sorted so that the most busy times do not overlap . The step of performing the prediction derives the call volume based on the location information where the mobile terminal is registered,
7. The load distribution method according to claim 6, wherein the selecting step is performed such that the average of the total call volume per switch is reduced. 8. The load distribution method according to claim 6, wherein the predicting step derives presence / absence of call restriction from an action pattern predicted from a moving speed of the mobile terminal. 7. The predicting step according to claim 6, wherein at least one of the call volume and the most busy time is predicted based on a result of statistical processing on a past call history of the mobile terminal. Item 9. The load distribution method according to any one of Items 8 to 9 . Performing the prediction claim 6, characterized in that from the results of statistical processing for past load status of the plurality of exchanges each have to perform at least one of prediction of the traffic intensity and the busy hour time The load distribution method according to claim 9 .

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