JP2004193950A - System, method, and program for reducing paging signal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the following problem that a congestion of wireless resources including paging signals occurs if traffic density increases, since the paging signals are transmitted to all radio base stations 301-308 existing in a location area 210. <P>SOLUTION: Histories of use of the base stations 301-308 are obtained, and paging signals are transmitted to base stations 301-304 used by the point of time when data are valid out of the histories of use. Moreover the histories of use of the base stations 301-308 are obtained, and from the histories of use statistic data of the base stations 301-308 used in each time zone, each day of a week, and each week are captured. Paging signals are transmitted to the base stations 301-304 being in statistic data corresponding to a time zone, a day of a week, a week, or a combination of these of the point of time of transmission of each paging signal. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a mobile communication system, and more particularly to a paging signal suppression system, suppression method, and program.
[0002]
[Prior art]
In a mobile communication system, the load of a paging signal (paging signal) always poses a problem, but a plurality of wireless base stations are grouped as a normal location area (LA), and a paging signal is transmitted on a group basis. I have to. However, since the number of wireless base stations in one LA is not so small, congestion of a paging signal occurs in an LA including a wireless base station with a high load.
[0003]
FIG. 7 is a block diagram showing a configuration of a conventional mobile communication system. An RNC (Radio Base Station Controller) 100, a location area (LA) 210 including radio base stations 301 to 308, a location area (LA) 220 including radio base stations 309 to 316, a radio terminal 400 used by a subscriber, It is comprised including. The RNC 100 transmits a paging signal to all the radio base stations 301 to 308 in the LA 210 (or all the radio base stations 309 to 316 in the LA 220).
[0004]
[Patent Document 1]
Japanese Patent Publication No. 10-502229 (Claim 1, FIG. 1, FIG. 4)
[0005]
[Problems to be solved by the invention]
In the conventional example described above, when the traffic increases, congestion of the radio resources including the paging signal and congestion of the RNC 100 (including the exchange) itself occur inevitably. Among them, the specific gravity in the paging signal transmission processing is high.
[0006]
Adding wireless resources requires additional hardware, and thus costs a great deal of money. Also, by transmitting the paging signal to all the radio base stations, the probability that a response will be returned is considerably increased, but the processing of the RNC 100 itself is squeezed. Against this background, it was necessary to consider a method of suppressing (reducing) the transmission of the paging signal without reducing the quality.
[0007]
[Means for Solving the Problems]
A paging signal suppression system according to the present invention includes a radio terminal, a radio base station connected to the radio terminal via a communication line, and a radio base station controller (RNC) transmitting a paging signal to the radio base station. A paging signal suppression system, wherein the RNC acquires a usage history of the radio base station and transmits a paging signal to the radio base station used up to a data valid point in the usage history. It is characterized by doing.
[0008]
A paging signal suppression system according to the present invention includes a radio terminal, a radio base station connected to the radio terminal via a communication line, and a radio base station controller (RNC) transmitting a paging signal to the radio base station. A paging signal suppression system, wherein the RNC obtains a usage history of the radio base station, and obtains statistics of the radio base station used for each time zone, each day of the week, and each week from the usage history. Data is transmitted, and the paging signal is transmitted to the wireless base station in the statistical data corresponding to a time zone, a day of the week, a week, or a combination thereof at the time of transmitting the paging signal.
[0009]
The paging signal suppression method of the present invention is a method of suppressing a paging signal in a mobile communication system, wherein a use history of a radio base station is obtained, and the radio wave used up to a data valid point in the use history is obtained. A paging signal is transmitted to a base station.
[0010]
The paging signal suppression method of the present invention is a method of suppressing a paging signal in a mobile communication system, wherein a use history of a radio base station is obtained, and the time is used for each time zone, every day of the week, and every week from the use history. Taking the statistical data of the wireless base station, and transmitting the paging signal to the wireless base station in the statistical data corresponding to the time zone, the day of the week, the week or a combination thereof at the time of transmitting the paging signal. And
[0011]
A method for suppressing a paging signal according to the present invention is a method for suppressing a paging signal in a mobile communication system, comprising: a position estimating step of estimating a position of a wireless terminal used by a subscriber based on a use history of a wireless base station; Transmitting a paging signal to the number of the wireless base station whose position has been predicted in the step.
[0012]
In the method of suppressing a paging signal according to the present invention, in the location prediction step, the acquisition step of acquiring a use history of the wireless base station used at the time of location registration / transmission / handoff success / incoming / disconnected; A step of specifying a base station, a step of calculating a radio base station save area existing for each subscriber, and a step of storing data including the number of the used radio base station in the radio base station save area. A storage determining step of determining whether the same radio base station number has already been stored, and if there is the same radio base station number, do not store the same radio base station already stored An updating step of updating the time when the wireless base station is used, and storing new data when the same wireless base station number is not available. An overflow judging step of judging whether or not overflow occurs, and, if an overflow occurs, a first storage for deleting the oldest data in time and storing data including the number of the radio base station in the radio base station save area. And a second storing step of storing data including the number of the radio base station in the radio base station save area when no overflow occurs, wherein the paging signal transmission step is performed when the paging signal is transmitted. A calculating step for calculating a wireless base station save area; a validity determining step for determining whether the stored data is valid or invalid by using a data valid time point; A first selection step for selecting the transmission target of the paging signal; And a transmission step of transmitting the paging signal to the radio base station selected as a transmission target of the paging signal. It is characterized by the following.
[0013]
The method of suppressing a paging signal according to the present invention is characterized in that the specifying step specifies the used radio base station, obtains the use history of the radio base station for each time period, for each day of the week, for each week, and obtains the statistical data. (1) If the selection step is valid, the wireless base station in the statistical data corresponding to the time zone, the day of the week, the week, or a combination thereof at the time of transmitting the paging signal is set as the transmission target of the paging signal. And
[0014]
A paging signal suppression program according to the present invention predicts the position of a radio terminal used by a subscriber based on the usage history of a radio base station to a computer of a radio base station controller (RNC) that transmits a paging signal in a mobile communication system. And executing a paging signal transmitting step of transmitting the paging signal to the wireless base station whose position has been predicted in the position predicting step.
[0015]
In the program for suppressing a paging signal according to the present invention, the location prediction step includes an acquisition step of acquiring a use history of the radio base station used at the time of location registration / transmission / handoff success / incoming / disconnected; A step of specifying a base station, a step of calculating a radio base station save area existing for each subscriber, and a step of storing data including the number of the used radio base station in the radio base station save area. A storage determining step of determining whether the same radio base station number has already been stored, and if there is the same radio base station number, do not store the same radio base station already stored An updating step of updating the time when the wireless base station has been used; and storing the new data when there is no same wireless base station number. An overflow judging step of judging whether or not the data overflows, and in the case of overflow, storing the data including the number of the radio base station in the radio base station save area by deleting the oldest data in time. 1 storage step; and when the overflow does not occur, a second storage step of storing data including the number of the radio base station in the radio base station save area, wherein the paging signal transmission step includes transmitting the paging signal. A calculating step of calculating the wireless base station save area, a validity determining step of determining whether the stored data is valid or invalid by using a data valid time, A first selection step of selecting a base station as a transmission target of the paging signal; A second selection step of selecting the radio base station under the application area as a transmission target of the paging signal, and a transmission step of transmitting the paging signal to the radio base station selected as the transmission target of the paging signal. Prepare.
[0016]
In the paging signal suppression program according to the present invention, the specifying step specifies the used radio base station, obtains the use history of the radio base station for each time period, for each day of the week, for each week, and obtains the statistical data. If the selection step is valid, the radio base station in the statistical data corresponding to the time zone, the day of the week, the week, or a combination thereof at the time of transmission of the paging signal is set as the transmission target of the paging signal.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
First Embodiment: Next, a first embodiment of the present invention will be described in detail with reference to the drawings.
[0018]
If it is possible to predict the radio base station where the calling subscriber (the radio terminal to which the paging signal is transmitted) is located, by transmitting the paging signal only to that radio base station, a considerable load can be suppressed. . Basically, it is considered that the range of action of a person (subscriber) is almost fixed for five days (weekdays) of a week, whether it is for adults or students. Therefore, by remembering the use history (including the number of the used wireless base station corresponding to the used wireless terminal and the used time) of the previous day's location registration / outgoing / incoming, etc. You can predict where you are at a fairly high probability. When transmitting a paging signal, as described above, by targeting only the radio base station expected at a high probability, a considerable paging signal can be suppressed, and both system and radio loads can be reduced. .
[0019]
FIG. 1 is a block diagram illustrating a configuration of a mobile communication system according to an embodiment of the present invention. 1, the description of the same parts as those in FIG. 7 is omitted. The wireless terminal 400 is connected to the wireless base stations 301 to 304, 305 to 308, and 309 to 316 via a communication line, and the paging signals are transmitted from the RNC 100 to the wireless base stations 301 to 304, 305 to 308, and 309 to 316. In the present invention, a paging signal is transmitted in anticipation of the wireless base stations 301 to 304 among the wireless base stations 301 to 308 in the LA 210 where the called wireless terminal 400 is located. Therefore, transmission of a paging signal is suppressed as compared with the related art. The control device (including the computer) in the RNC 100 controls the estimation of the radio base stations 301 to 304 and transmission of the paging signal, and executes the control of the flowcharts illustrated in FIGS.
[0020]
Next, the operation of the embodiment of the present invention will be described with reference to the drawings.
[0021]
FIG. 2 is a flowchart of position estimation of a subscriber (position estimation step). A process for acquiring a usage history of a wireless base station used at the time of location registration / transmission / handoff success / reception / disconnection of a certain wireless terminal 400 is started (step S201). Next, the wireless base station (for example, the wireless base stations 301 to 304 in FIG. 1) used at the time of location registration / transmission / handoff success / incoming / disconnected of the wireless terminal 400 is specified (step S202).
[0022]
The wireless base station save area (wireless base station information area) existing for each subscriber who uses the wireless terminal 400 is calculated (step S203). When storing the data including the used wireless base station number (wireless base station number) in the wireless base station save area, it is determined whether the same wireless base station number has already been stored (step S204). Here, the data includes, for each subscriber identification number, the time of location registration / transmission / handoff success / reception / disconnection, and the wireless base station number used at that time. When storing, if there is the same wireless base station number (YES in step S204), it is not stored, and the time (year, month, day, hour, minute, second) when the stored same wireless base station is used is not stored. Is updated (step S205). Also, when storing, if there is no identical wireless base station number (NO in step S204), it is determined whether or not the wireless base station save area overflows when new data is stored (step S206). If an overflow occurs (YES in step S206), the oldest data (oldest data) is deleted (step S207), and the data including the wireless base station number is stored in the wireless base station save area (step S208). . If no overflow occurs (NO in step S206), data including the wireless base station number is stored in the wireless base station save area (step S208).
[0023]
FIG. 3 shows address linkage for storing the number of the radio base station used at this time, and manages data including the radio base station number and the like on the storage device of the RNC 100.
[0024]
FIG. 4 is a flowchart (paging signal transmission step) when an actual paging signal is transmitted. At the time of transmission of the paging signal, in order to calculate the radio base station to be transmitted, the radio base station save area existing for each subscriber (subscriber unit) set in the position prediction of the subscriber in FIG. 2 is calculated (step). S401).
[0025]
The validity of the stored data is determined using the data valid time (step S402). Here, the term “validity” refers to validating temporally new data and invalidating temporally old data in the usage history of the wireless base station, and makes a determination based on the data validity point. For example, if the data valid time is set to 10:00 of the previous day, the data up to 10:00 of the previous day, which is retroactive from the transmission time of the paging signal (current transmission time), is valid, and the data before that is invalid. It becomes. If the data valid time is 10:00 one week before, the data up to 10:00 one week before the paging signal transmission time is valid, and the data before that is invalid. The data valid point is appropriately determined using year, month, day, hour, minute, second, and the like. In other words, the usage history from the point of transmission of the paging signal to the point of validity of the data that goes back is valid.
[0026]
As a result of the validity determination, if valid (YES in step S402), the stored wireless base station (for example, the wireless base stations 301 to 304 in FIG. 1) is selected as a paging signal transmission target (step S403). . If the data is invalid (NO in step S402), all wireless base stations under the LA are selected as transmission targets of the paging signal as before (step S404). Next, a paging signal is transmitted to the paging signal transmission target radio base station (step S405).
[0027]
Second Embodiment: The second embodiment is different from the first embodiment in that the usage history of the radio base station is collected for each day of the week / week. Although the block diagram showing the configuration of the mobile communication system is the same as that of FIG.
[0028]
FIG. 5 is a flowchart of position estimation of a subscriber (position estimation step). The difference from FIG. 2 is that, in step S502, the used wireless base station is specified, and the usage history of the wireless base station is obtained for each time slot / day of the week / weekly statistical data. With the statistical data for each time zone / day of the week / week, the radio base station where the subscriber is located can be predicted with a considerably high probability.
[0029]
For example, the radio base stations 301 and 302 on Monday, the radio base stations 301, 302 and 303 on Tuesday, the radio base stations 303, 304, 305 and 306 on Wednesday, the radio base stations 303, 304 and 305 on Thursday, and the radio base stations on Friday The stations 304, 305, 306, and 307 represent the statistical results such as the radio base stations 306, 307, and 308 on Saturday, and the radio base stations 307 and 308 on Sunday. In the first week, the wireless base stations 301 and 302, in the second week, the wireless base stations 303, 304, 305, in the third week, the wireless base stations 304, 305, 306, 307, and in the fourth week, 306, 307, A statistical result is represented as 308. Although the load may increase due to the memory area reservation and statistical calculation processing for each subscriber, the wireless base station where the subscriber is located can be predicted with a considerably high probability.
[0030]
FIG. 6 is a flowchart (paging signal transmission step) when an actual paging signal is transmitted. The difference from FIG. 4 is that in step S603, the time zone / day of the week / week / week at the time of transmitting the paging signal (transmission time) is checked, and the corresponding stored wireless base station is set as the transmission target of the paging signal. It is. If the transmission time point is Monday, among the stored wireless base stations, the wireless base station calculated as the statistical data on Monday is the transmission target of the paging signal.
[0031]
Statistical data is collected and used for each time zone such as 9:00 to 10:00, for each time zone such as every morning / afternoon and every day / night, every day of the week, every week, and every month. It is also effective. Further, the statistical data of each time period (9:00 to 10:00, etc.), every morning / afternoon, every day / night, every day of the week, every week, and every month are combined to transmit the paging signal. Predicting the radio base station is also effective. That is, if the transmission time point at which the paging signal is to be transmitted is a time zone of 9:00 to 10:00 on Monday, the day of the week and the time zone in the statistical data are combined, and 9:00 to 100.00 on Monday are combined. A wireless base station having a usage history in the time zone of hour 00 becomes a paging signal transmission target.
[0032]
【The invention's effect】
The first effect is that the hardware configuration is changed by predicting the radio base station where the calling subscriber (mobile station) is located and by sending a paging signal only to the predicted radio base station, and by changing the hardware configuration of the LA. It is to suppress transmission of a paging signal without narrowing the range.
[0033]
The second effect is to reduce the congestion of the radio resources and the congestion of the RNC (switch) by suppressing the transmission of the paging signal.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating a configuration of a mobile communication system according to a first embodiment of the present invention.
FIG. 2 is a flowchart of position estimation of a subscriber.
FIG. 3 is a table address linkage.
FIG. 4 is a flowchart when an actual paging signal is transmitted.
FIG. 5 is a flowchart of subscriber location prediction according to the second embodiment of the present invention;
FIG. 6 is a flowchart when an actual paging signal is transmitted according to the second embodiment of the present invention.
FIG. 7 is a block diagram showing a configuration of a conventional mobile communication system.
[Explanation of symbols]
100 RNC
210, 220 LA
301 to 308 wireless base stations 309 to 316 wireless base station 400 wireless terminal

Claims (10)

A paging signal suppression system, comprising: a radio terminal, a radio base station connected to the radio terminal via a communication line, and a radio base station controller (RNC) transmitting a paging signal to the radio base station. hand,
The RNC is
A paging signal suppression system, comprising: acquiring a use history of the radio base station; and transmitting a paging signal to the radio base station used up to a data valid point in the use history. A paging signal suppression system, comprising: a radio terminal, a radio base station connected to the radio terminal via a communication line, and a radio base station controller (RNC) transmitting a paging signal to the radio base station. hand,
The RNC is
Obtaining the usage history of the wireless base station, from the usage history for each time zone, for each day of the week, to take statistical data of the wireless base station used for each week,
A paging signal suppression system, wherein the paging signal is transmitted to the radio base station in the statistical data corresponding to a time zone, a day of the week, a week, or a combination thereof at the time of transmitting the paging signal. A method for suppressing a paging signal in a mobile communication system,
A method for suppressing a paging signal, comprising: acquiring a use history of a radio base station; and transmitting a paging signal to the radio base station used up to a data valid point in the use history. A method for suppressing a paging signal in a mobile communication system,
Obtain a usage history of the radio base station, and from the usage history, for each time zone, for each day of the week, take statistical data of the radio base station used for each week,
A method of suppressing a paging signal, comprising: transmitting the paging signal to the wireless base station in the statistical data corresponding to a time zone, a day of the week, a week, or a combination thereof at the time of transmitting the paging signal. A method for suppressing a paging signal in a mobile communication system,
A position estimating step of estimating the position of the wireless terminal used by the subscriber based on the usage history of the wireless base station
A paging signal transmission step of transmitting the paging signal to the number of the radio base station whose position is predicted in the position prediction step,
A method of suppressing a paging signal, comprising: The position prediction step includes:
An acquisition step of acquiring a usage history of the wireless base station used at the time of location registration / transmission / handoff success / incoming / disconnected;
A specifying step of specifying the used radio base station;
A calculating step of calculating a wireless base station save area existing for each subscriber;
When storing data including the number of the used radio base station in the radio base station save area, a storage judgment step of judging whether or not the same radio base station number has already been stored,
If there is the same radio base station number, do not store it, update the time of using the same radio base station already stored, update step,
If there is no same wireless base station number, an overflow determining step of determining whether or not the wireless base station save area overflows when storing new data,
If overflow occurs, a first storing step of deleting the oldest data in time and storing data including the number of the radio base station in the radio base station save area;
If no overflow occurs, a second storing step of storing data including the number of the radio base station in the radio base station save area;
With
The paging signal transmitting step,
A calculating step of calculating the radio base station save area when transmitting the paging signal;
Validity determining step of determining whether the stored data is valid or invalid using the data validity point;
A first selection step of selecting the stored radio base station as a transmission target of the paging signal if valid;
If invalid, a second selection step of selecting the radio base station under the location area as a transmission target of the paging signal,
A transmission step of transmitting the paging signal to the radio base station selected as the transmission target of the paging signal,
The paging signal suppression method according to claim 5, further comprising: The identifying step includes:
The used radio base station is specified, and the usage history of the radio base station is obtained for each time period, for each day of the week, and for each week,
The first selection step includes:
7. The wireless communication apparatus according to claim 6, wherein if valid, the wireless base station in the statistical data corresponding to a time zone, a day of the week, a week, or a combination thereof at the time of transmitting the paging signal is set as a transmission target of the paging signal. 3. The method for suppressing a paging signal according to item 1. In a computer of a radio base station controller (RNC) for transmitting a paging signal in a mobile communication system,
A position estimating step of estimating the position of the wireless terminal used by the subscriber based on the usage history of the wireless base station
A paging signal transmission step of transmitting the paging signal to the radio base station whose position is predicted in the position prediction step,
Paging signal suppression program to execute The position prediction step includes:
An acquisition step of acquiring a usage history of the wireless base station used at the time of location registration / transmission / handoff success / incoming / disconnected;
A specifying step of specifying the used radio base station;
A calculating step of calculating a wireless base station save area existing for each subscriber;
When storing data including the number of the used radio base station in the radio base station save area, a storage judgment step of judging whether or not the same radio base station number has already been stored,
If there is the same radio base station number, do not store it, update the time of using the same radio base station already stored, update step,
If there is no same wireless base station number, an overflow determining step of determining whether or not the wireless base station save area overflows when storing new data,
If overflow occurs, a first storing step of deleting the oldest data in time and storing data including the number of the radio base station in the radio base station save area;
If no overflow occurs, a second storing step of storing data including the number of the radio base station in the radio base station save area;
With
The paging signal transmitting step,
A calculating step of calculating the radio base station save area when transmitting the paging signal;
Validity determining step of determining whether the stored data is valid or invalid using the data validity point;
A first selection step of selecting the stored radio base station as a transmission target of the paging signal if valid;
If invalid, a second selection step of selecting the radio base station under the location area as a transmission target of the paging signal,
A transmission step of transmitting the paging signal to the radio base station selected as the transmission target of the paging signal,
The program for suppressing a paging signal according to claim 8, comprising: The identifying step includes:
The used radio base station is specified, and the usage history of the radio base station is obtained for each time period, for each day of the week, and for each week,
The first selection step includes:
10. When the paging signal is valid, the radio base station in the statistical data corresponding to a time zone, a day of the week, a week, or a combination thereof at the time of transmitting the paging signal is set as a transmission target of the paging signal. A paging signal suppression program according to.

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