WO2015029781A1

WO2015029781A1 - Wireless communication system and information processing method

Info

Publication number: WO2015029781A1
Application number: PCT/JP2014/071361
Authority: WO
Inventors: 康史森岡; 林　宏樹; 正徳石田; 芳文森広
Original assignee: 株式会社Ｎｔｔドコモ
Priority date: 2013-08-30
Filing date: 2014-08-13
Publication date: 2015-03-05
Also published as: JP6178175B2; JP2015050497A

Abstract

A wireless communication system comprises: base stations that form cells; a stay information database that stores stay information elements; a statistical information database that stores statistical information elements calculated on the basis of the stay information elements; an update opportunity detection unit that detects an update opportunity; an update instruction unit that instructs an update for a particular cell identifier or all cell identifiers; and a database control unit that, when the update instruction unit instructs the update of the particular cell identifier, updates the statistical information element corresponding to the stay information element having the particular cell identifier and that, when the update instruction unit instructs the update of all the cell identifiers, updates the statistical information elements corresponding to the stay information elements having the cell identifiers extracted, without any duplications, from the stay information database.

Description

Wireless communication system and information processing method

The present invention relates to a wireless communication system and an information processing method.

In recent years, depending on the location where the user device is present, depending on the location of the user device, for example, a technique for providing the user device with information corresponding to the location (for example, advertisement information of a store that exists in the vicinity of the location) A technique for controlling the operation of the user apparatus has been proposed. The position of the user apparatus is specified based on, for example, GPS (Global Positioning System) positioning information or information on a base station to which the user apparatus is wirelessly connected.

JP 2010-262484 A

The role / function of a place (cell) in which the user device exists (hereinafter sometimes referred to as “location characteristic”) varies depending on the user who uses the user device. For example, a complex with a residential area and an office area is a home for some users, but a work location for other users. That is, one facility may have different location characteristics for each user. Therefore, it is considered that it is preferable that the location characteristic for the user is determined in a technique for providing information according to the position to the user apparatus and a technique for controlling the operation of the user apparatus according to the position. This is because more appropriate information reflecting the location characteristics can be provided to the user, and the operation of the user apparatus can be more appropriately controlled by reflecting the location characteristics.

The location characteristic can be determined based on statistical information calculated using information on a history of staying in the cell by the user apparatus (hereinafter, sometimes referred to as “stay information”). The statistical information is, for example, the average length of stay in each cell. A cell having a long average stay time can be determined as a user's base (home, work location, etc.). Considering that statistical information is acquired by statistically processing a large amount of stay information, frequent updating of statistical information may cause an increase in processing load (and thus an increase in power consumption). In addition, if the calculation process is performed on all stay information when using the statistical information, the process takes a lot of time, and the statistical information may not be provided in a timely manner.

In view of the above circumstances, an object of the present invention is to more appropriately execute update of statistical information based on stay information.

The wireless communication system of the present invention includes a plurality of base stations each forming a cell identified by a cell identifier, and stay information storing a plurality of stay information elements each indicating information on stay in the cell by a user apparatus Database, statistical information database storing a plurality of statistical information elements each calculated based on one or more stay information elements corresponding to one cell identifier, and update trigger detection for detecting an update trigger occurring in the user device An update instruction unit for instructing update of statistical information elements for one or more specific cell identifiers or all cell identifiers based on the update trigger detected by the update trigger detection unit, and the update instruction unit In the case of instructing the update of the statistical information element for one or more specific cell identifiers, the stay information element having the specific cell identifier While updating the corresponding statistical information element, when the update instruction unit instructs to update the statistical information element for all cell identifiers, extract a plurality of cell identifiers included in the stay information database without duplication, A database control unit for updating a statistical information element corresponding to the stay information element having the extracted cell identifier.

In a preferred aspect of the present invention, the wireless communication system further includes a statistical information acquisition unit that requests a statistical information element corresponding to the cell identifier by notifying the database control unit of one or more cell identifiers. When the statistical information element corresponding to the cell identifier notified from the statistical information acquisition unit is not included in the statistical information database, the database control unit sends a signal indicating the absence of the statistical information element to the statistical information When the statistical information acquisition unit receives the signal, the statistical information acquisition unit notifies the update trigger detection unit of a statistical information request for the cell identifier, and the update trigger detection unit receives the statistical information request from the statistical information acquisition unit. The notified statistical information request is detected as the update opportunity, and the update instruction unit is configured to update the cell identifier indicated by the statistical information request. Instructs update of the total information element, the database control unit is supplied to the statistical information acquisition unit to calculate the statistical information element corresponding to the cell identifier instructed.

In a preferred aspect of the present invention, the wireless communication system further includes a statistical information acquisition unit that requests a statistical information element corresponding to the cell identifier by notifying the database control unit of one or more cell identifiers. The database control unit, when a statistical information element corresponding to the cell identifier notified from the statistical information acquisition unit is not included in the statistical information database, requests a statistical information request for the cell identifier from the update trigger detection unit The update trigger detection unit detects the statistical information request notified from the database control unit as the update trigger, and the update instruction unit includes statistical information on the cell identifier indicated by the statistical information request. The update of the element is instructed, and the database control unit updates the statistical information element corresponding to the instructed cell identifier. After, it supplied to the statistical information acquisition unit.

In a preferred aspect of the present invention, the update opportunity detection unit detects a handover from the first cell to the second cell by the user device as the update opportunity, and the update instruction unit is based on the update opportunity, An instruction to update a statistical information element for the cell identifier of the first cell and the cell identifier of the second cell is given.

In a preferred aspect of the present invention, the update opportunity detection unit detects arrival of a predetermined time as the update opportunity, and the update instruction unit, based on the update opportunity, includes all the information included in the stay information database. Instructs the update of the statistical information element for the cell identifier.

In a preferred aspect of the present invention, the update trigger detection unit detects that the user device is being charged and the user device is in an inactive state as the update trigger, and the update instruction unit Based on the update opportunity, the update of the statistical information elements for all the cell identifiers included in the stay information database is instructed.

The information processing method of the present invention includes a plurality of base stations that each form a cell identified by a cell identifier, and a plurality of stay information elements each storing information on stays in the cell by a user apparatus. In a wireless communication system comprising a database and a statistical information database storing a plurality of statistical information elements each calculated based on one or more stay information elements corresponding to one cell identifier, an update opportunity generated in the user apparatus Detecting one or more specific cell identifiers or all cell identifiers based on the detected update trigger, and updating one or more specific cell identifiers. In the case of updating the statistical information element corresponding to the stay information element having the specific cell identifier, If the new is instructed, and a updating the statistical information element wherein a plurality of cell identifiers overlap without extraction included in staying information database, corresponding to the stay information element with the extracted cell identifier.

According to the present invention, the statistical information based on the stay information is updated more appropriately.

1 is a block diagram showing a wireless communication system according to a first embodiment. It is a figure which shows the cell which the base station which concerns on 1st Embodiment forms. It is a block diagram which shows the structure of the user apparatus which concerns on 1st Embodiment. It is a block diagram which shows the structure of the base station which concerns on 1st Embodiment. It is a flowchart which shows the statistical information update process which concerns on 1st Embodiment. It is a figure which shows the structural example of the stay information database memorize | stored in a memory | storage part. It is a figure which shows the structural example of the statistical information database memorize | stored in a memory | storage part. It is a flowchart which shows the process regarding the statistical information request | requirement which concerns on 1st Embodiment. It is a flowchart which shows the process regarding the statistical information request | requirement which concerns on a modification.

1. First Embodiment 1 (1). Overview of Radio Communication System FIG. 1 is a block diagram showing a radio communication system CS according to the first embodiment of the present invention. The radio communication system CS includes the user apparatus 100 and the base station 200 as elements. Base station 200 is connected to a core network including elements (not shown) other than those described above, an exchange, and a gateway. The network NW includes elements other than the user apparatus 100 among the elements included in the wireless communication system CS.

Each element in the radio communication system CS performs communication according to an arbitrary access technology (Access Technology). For example, the LTE / SAE (Long Term Evolution / System Architect Evolution) standard included in the 3GPP (Third Generation Partnership Project) standard is exemplified as an applicable access technology. As a radio access multiplexing scheme, frequency division multiplexing may be used, or time division multiplexing may be used. In the radio communication system CS, a plurality of radio access technologies (eg, 3G and LTE) may be employed.

As shown in FIG. 2, the base station 200 (200a, 200b) forms a cell C (Ca, Cb) around it. Cell C is identified by a unique cell identifier CID. The user apparatus 100 can wirelessly communicate with the base station 200 corresponding to the cell C in which the user apparatus 100 stays (is present). One base station 200 may form a plurality of cells C. The radio access technology used in each cell C can be arbitrarily selected. For example, in a plurality of cells C formed by one base station 200, a common radio access technology may be adopted, or different radio access technologies may be adopted.

1 (2). Configuration of each element 1 (2) -1. Configuration of User Device FIG. 3 is a block diagram illustrating a configuration of the user device 100 according to the first embodiment. The user device 100 includes a wireless communication unit 110, a storage unit 120, and a control unit 130. Illustrations of an output device that outputs audio, video, and the like, an input device that receives an instruction from a user, and the like are omitted for convenience. The radio communication unit 110 is an element for executing radio communication with the base station 200, and includes a transmission / reception antenna, a receiving circuit that receives a downlink radio signal from the base station 200 and converts it into an electric signal, a control signal, and a user A transmission circuit that converts an electrical signal such as a signal into an upstream radio signal. The storage unit 120 stores information (statistical information) based on the stay information database 122 that stores information about the stay in the cell C (stay information VI) by the user apparatus 100 and the stay information element VE corresponding to the cell identifier CID. And a statistical information database 124 for storing SI). The stay information VI includes a plurality of stay information elements VE, and the statistical information SI includes a plurality of statistical information elements SE.

The control unit 130 includes an update opportunity detection unit 132, an update instruction unit 134, a database control unit 136, and a statistical information acquisition unit 138. The update trigger detection unit 132 detects an update trigger (details will be described later) that occur according to the user device 100. The update instruction unit 134 instructs to update the statistical information database 124 (statistical information element SE). The database control unit 136 controls input / output with the stay information database 122 and the statistical information database 124. For example, the database control unit 136 updates the statistical information element SE in the statistical information database 124 corresponding to the cell identifier CID specified by the update instruction unit 134. The statistical information acquisition unit 138 requests the database control unit 136 to acquire the statistical information element SE. Further details of the operation of each element in the control unit 130 will be described later. The control unit 130 and each element in the control unit 130 are functions realized when a CPU (not shown) in the user apparatus 100 executes a computer program stored in the storage unit 120 and functions according to the computer program. It is a block.

1 (2) -2. Configuration of Base Station FIG. 4 is a block diagram showing a configuration of the base station 200 according to the first embodiment. The base station 200 includes a wireless communication unit 210, a network communication unit 220, and a control unit 230. The wireless communication unit 210 is an element for performing wireless communication with the user device 100 and is configured in the same manner as the wireless communication unit 110 of the user device 100. The network communication unit 220 is an element that performs wired communication with other nodes in the network NW (other base stations 200, exchanges, gateways, and the like). The control unit 230 transmits / receives signals (control signals, data signals, etc.) to / from the user apparatus 100 and other nodes in the network NW via the wireless communication unit 210 and the network communication unit 220. The control unit 230 is a functional block realized by a CPU (not shown) in the base station 200 executing a computer program stored in a storage unit (not shown) and functioning according to the computer program.

1 (3). Information processing 1 (3) -1. Statistical Information Update Processing FIG. 5 is a flowchart showing statistical information element SE update processing. FIG. 6 is a diagram illustrating the configuration of the stay information database 122 (stay information VI). FIG. 7 is a diagram illustrating a configuration of the statistical information database 124 (statistical information SI).

Prior to the description of the flowchart of the update process, the structure of the stay information VI and the statistical information SI will be described. As shown in FIG. 6, the stay information VI includes a plurality of stay information elements VE (VE1, VE2, VE3, VE4, VE5,...) Each corresponding to one stay in the cell C by the user apparatus 100. Including. Each stay information element VE includes a plurality of information items such as a cell identifier CID, a stay start time, a stay end time, and a stay time length.

As shown in FIG. 7, the statistical information SI includes a plurality of statistical information elements SE (SE1, SE2, SE3,..., Each calculated based on one or more stay information elements VE corresponding to one cell identifier CID. )including. For example, the statistical information element SE1 for the cell Ca is calculated based on the stay information elements VE1 and VE5 corresponding to the stay in the cell Ca. Each statistical information element SE includes a plurality of information items such as a cell identifier CID and an average staying time length.

The update trigger detection unit 132 detects various events that occur in the user device 100 as update triggers (S10). Non-limiting examples of events that serve as update triggers are given below.
User apparatus 100 has been handed over from the first cell C1 to the second cell C2 (update opportunity A)
-The display of the user device 100 has transitioned to the on state (update opportunity B)
-User device 100 is being charged and inactive (update opportunity C)
Instructed to shut down the OS of the user device 100 (update opportunity D)
-A statistical information request (described later) was detected (update opportunity E)
・ Predetermined time (for example, 3:00 am) has arrived (update opportunity F)

The update instruction unit 134 instructs the database control unit 136 to update the statistical information element SE for one or more specific cell identifiers CID or all cell identifiers CID based on the update trigger detected by the update trigger detection unit 132. (S20). For example, when the update opportunity A is detected, the update instruction unit 134 instructs to update the cell identifier CID of the first cell C1 and the cell identifier CID of the second cell C2, which are the cells C before and after the handover. When the update opportunity B is detected, the update instruction unit 134 instructs to update the cell identifier CID of the cell C where the user apparatus 100 is staying. When the update opportunity E is detected, the update instruction unit 134 instructs to update the cell identifier CID indicated by the statistical information request. When update triggers C, D, and F are detected, the update instruction unit 134 instructs to update all cell identifiers CID. As understood from the above, the update instruction includes the update instruction for the statistical information element SE for the specific cell identifier CID (specific update instruction) and the update instruction for the statistical information element SE for all the cell identifiers CID (update instruction for all cases). ).

Here, “all cell identifiers CID” means cells obtained by removing duplicate cell identifiers CID from a plurality of cell identifiers CID indicated by all stay information elements VE included in the stay information database 122 (stay information VI). Indicates the identifier CID. That is, in “all cell identifiers CID”, there is only one cell identifier CID (unique). For example, in FIG. 6, “all cell identifiers CID” are three cell identifiers CID (Ca, Cb, Cc) obtained by removing duplicates from five cell identifiers CID (Ca, Cb, Cc, Cb, Ca). is there.

When the update instruction unit 134 instructs to update the statistical information element SE for the specific cell identifier CID (S30; specific update), the database control unit 136 selects the stay information element VE having the specified specific cell identifier CID. Obtained from the stay information database 122 (stay information VI), the statistical information element SE is calculated for each cell identifier CID (S40). For example, the database control unit 136 calculates the average stay time length by averaging the stay time lengths indicated by the stay information elements VE for each of the specific cell identifiers CID.

On the other hand, when the update instructing unit 134 instructs to update the statistical information element SE for all the cell identifiers CID (S30; all cases updated), the database control unit 136 stores all the information from the stay information database 122 (stay information VI). The stay information element VE is acquired, all the cell identifiers CID included in the acquired stay information element VE are extracted without duplication (uniquely), and the statistical information element SE is calculated for each extracted cell identifier CID (S50). ).

When step S40 or step S50 ends, the database control unit 136 updates the statistical information database 124 (statistical information SI) in units of cell identifiers CID using the statistical information element SE calculated in units of cell identifiers CID (S60). ).

1 (3) -2. Processing for Statistical Information Request Next, processing for statistical information request will be described below. In summary, the statistical information acquisition unit 138 acquires the statistical information element SE based on an instruction from a module (for example, a module that displays an advertisement corresponding to a position) in the user device 100 that uses the statistical information element SE. Provide to that module. Here, the instruction from the above module includes a cell identifier CID corresponding to one or more statistical information elements SE to be acquired.

FIG. 8 is a flowchart showing processing relating to the request for the statistical information element SE. The statistical information acquisition unit 138 requests the statistical information element SE corresponding to the notified cell identifier CID by notifying the database control unit 136 of one or more cell identifiers CID (S110).

When the cell identifier CID is notified from the statistical information acquisition unit 138, the database control unit 136 searches the statistical information database 124 (statistical information SI) using the notified cell identifier CID. When there is a statistical information element SE corresponding to the notified cell identifier CID (S120; YES), the database control unit 136 acquires the retrieved statistical information element SE and provides it to the statistical information acquisition unit 138 (S130). ).

On the other hand, when the statistical information element SE corresponding to the cell identifier CID notified from the statistical information acquisition unit 138 is not included in the statistical information database 124 (statistical information SI) (S120; NO), the database control unit 136 acquires the statistical information element SE. A signal indicating the absence of the power statistical information element SE is transmitted to the statistical information acquisition unit 138 (S140).

When the above signals are received, the statistical information acquisition unit 138 notifies the update trigger detection unit 132 of a statistical information request for requesting acquisition of the statistical information element SE for the notified cell identifier CID (S150). The update opportunity detection unit 132 detects the notified statistical information request as an update opportunity (S160). The update instruction unit 134 instructs to update the statistical information element SE for the cell identifier CID indicated by the above statistical information request based on the detected update trigger (S170). Upon receiving the above instruction, the database control unit 136 acquires the stay information element VE corresponding to the instructed cell identifier CID from the stay information database 122 (stay information VI), and obtains the statistical information element SE for each cell identifier CID. It calculates and provides to the statistical information acquisition part 138 (S180). After that, the database control unit 136 may or may not update the statistical information database 124 using the calculated statistical information element SE.

1 (4). Effects of this embodiment According to the above configuration, the update of the statistical information SI based on the stay information VI is more appropriately executed. More specifically, since the stay information database 122 that stores the stay information element VE and the statistical information database 124 that stores the statistical information element SE are provided separately, the statistical information element is changed from the stay information element VE to each time there is a request. Compared with the configuration in which the SE is calculated, the response is improved and the processing load is reduced. Further, since it is determined whether to update a specific cell identifier CID or to update all cases according to the detected update opportunity, the update of all cases in the statistical information database 124 is executed for each update opportunity. In comparison, the above technical effects become more prominent.

2. Modifications The above embodiment can be variously modified. Specific modifications are exemplified below. Two or more aspects arbitrarily selected from the above embodiments and the following examples can be appropriately combined as long as they do not contradict each other.

2 (1). Modification 1
Each stay information element VE may include information items other than the information items shown in FIG. For example, the type of wireless system in cell C (LTE, 3G, wireless LAN, etc.), wireless LAN connection history (present / not present), operating state (active / inactive), charged state (changed to charged state during stay) ), Battery level (remaining battery level at the start or end of stay), communication status (whether or not the wireless communication status has been changed during stay), location characteristics (home, work) Destination, railway station, etc.), day of the week (stay day) of staying in cell C, time zone of staying in cell C (staying time zone), number of times of wireless communication performed during stay of cell C, and user device 100 frequently The distance from the base cell where the user stays (for example, the cell C corresponding to the user's home) is shown as an example of the information item. All or part of the above information items may be included in the stay information element VE.

Each statistical information element SE may include information items other than the information items shown in FIG. For example, the type of the wireless system of the cell C, the wireless LAN connection rate (the ratio of the stay information element VE whose wireless LAN connection history is “present”), the operation rate (the ratio of the stay information element VE whose operating state is “active”) ), Charging frequency (ratio of stay information element VE whose charge state is “present”), average battery remaining amount, total number of stays, and location characteristics are shown as examples of information items. All or part of the above information items may be included in the statistical information element SE.

2 (2). Modification 2
In step S10, an arbitrary event can be detected as an update opportunity. For example, the update opportunity detection unit 132 determines that the user device 100 is being charged, is in an inactive state, and the location characteristics of the cell C that is staying are “home” or “workplace”. You may detect as an update opportunity for matter update. According to the above configuration, there is a possibility that the user is not using the user device 100 and the user device 100 is being charged by the power supplied from the fixed power supply instead of from the portable charging device. In the high state, all cases of the statistical information database 124 are updated. As a result, adverse effects on service quality caused by a decrease in response and an increase in power consumption due to the update of all cases can be suppressed.

2 (3). Modification 3
The database control unit 136 may notify the update opportunity detection unit 132 of a statistical information request. With reference to the flowchart of FIG. 9, the structure of this modification is demonstrated concretely. Step S110, step S120 (in the case of YES), and step S130 are the same as in the first embodiment.

When the statistical information element SE corresponding to the cell identifier CID notified from the statistical information acquisition unit 138 is not included in the statistical information database 124 (statistical information SI) (S120; NO), the database control unit 136 notifies the notified cell. A statistical information request for requesting acquisition of the statistical information element SE for the identifier CID is notified to the update trigger detection unit 132 (S142). The update opportunity detector 132 detects the notified statistical information request as an update opportunity (S152). The update instructing unit 134 instructs to update the cell identifier CID indicated by the statistical information request based on the detected update trigger (S162).

Upon receiving the above instruction, the database control unit 136 acquires the stay information element VE corresponding to the instructed cell identifier CID from the stay information database 122 (stay information VI), and obtains the statistical information element SE for each cell identifier CID. The statistical information element SE corresponding to the specified cell identifier CID in the statistical information database 124 is updated by calculation (S172). Thereafter, the database control unit 136 supplies the updated statistical information element SE to the statistical information acquisition unit 138.

2 (4). Modification 4
In the above embodiment, the user device 100 includes the stay information database 122, the statistical information database 124, the update opportunity detection unit 132, the update instruction unit 134, the database control unit 136, and the statistical information acquisition unit 138. However, at least one of the above elements may be provided in a device on the network NW side (for example, base station 200, dedicated server device). That is, each of the elements for carrying out the present invention can be arranged at an arbitrary location of the radio communication system CS.

2 (5). Modification 5
The user device 100 is an arbitrary device capable of wireless communication with the base station 200. The user device 100 may be, for example, a mobile phone terminal such as a feature phone or a smartphone, a desktop personal computer, a notebook personal computer, a UMPC (Ultra-Mobile Personal Computer), or a portable game machine. Other wireless terminals may be used.

2 (6). Modification 6
Each function executed by the CPU in each element (user device 100, base station 200) in the wireless communication system CS may be executed by hardware instead of the CPU, for example, an FPGA (Field Programmable Gate Array), You may perform with programmable logic devices, such as DSP (Digital Signal Processor).

DESCRIPTION OF SYMBOLS 100 ... User apparatus, 110 ... Wireless communication part, 120 ... Memory | storage part, 122 ... Stay information database, 124 ... Statistical information database, 130 ... Control part, 132 ... Update opportunity detection part, 134 ... Update instruction unit, 136 ... database control unit, 138 ... statistical information acquisition unit, 200 ... base station, 210 ... wireless communication unit, 220 ... network communication unit, 230 ... control unit, C ... cell, CID: Cell identifier, CS: Wireless communication system, NW: Network, SE: Statistical information element, SI: Statistical information, VE: Stay information element, VI: Stay information.

Claims

A plurality of base stations each forming a cell identified by a cell identifier;
A stay information database storing a plurality of stay information elements each indicating information on stays in the cell by the user device;
A statistical information database storing a plurality of statistical information elements each calculated based on one or more stay information elements corresponding to one cell identifier;
An update opportunity detector that detects an update opportunity that occurs in the user device;
Based on the update trigger detected by the update trigger detection unit, an update instruction unit that instructs to update one or more specific cell identifiers or statistical information elements for all cell identifiers;
When the update instruction unit instructs to update the statistical information element for one or more specific cell identifiers, the update instruction unit updates the statistical information element corresponding to the stay information element having the specific cell identifier. When the unit instructs to update statistical information elements for all cell identifiers, a plurality of cell identifiers included in the stay information database are extracted without duplication, and corresponding to the stay information elements having the extracted cell identifiers A wireless communication system comprising: a database control unit that updates a statistical information element.
A statistical information acquisition unit that requests a statistical information element corresponding to the cell identifier by notifying the database control unit of one or more cell identifiers;
The database control unit
When the statistical information element corresponding to the cell identifier notified from the statistical information acquisition unit is not included in the statistical information database, a signal indicating the absence of the statistical information element is transmitted to the statistical information acquisition unit,
The statistical information acquisition unit
When the signal is received, a statistical information request for the cell identifier is notified to the update trigger detection unit,
The update opportunity detection unit,
Detecting the statistical information request notified from the statistical information acquisition unit as the update opportunity,
The update instruction unit
Instructing update of a statistical information element for the cell identifier indicated by the statistical information request,
The database control unit
The wireless communication system according to claim 1, wherein a statistical information element corresponding to the instructed cell identifier is calculated and supplied to the statistical information acquisition unit.
A statistical information acquisition unit that requests a statistical information element corresponding to the cell identifier by notifying the database control unit of one or more cell identifiers;
The database control unit
When the statistical information element corresponding to the cell identifier notified from the statistical information acquisition unit is not included in the statistical information database, the statistical information request for the cell identifier is notified to the update trigger detection unit,
The update opportunity detection unit,
Detecting the statistical information request notified from the database control unit as the update opportunity,
The update instruction unit
Instructing update of a statistical information element for the cell identifier indicated by the statistical information request,
The database control unit
The wireless communication system according to claim 1, wherein the statistical information element corresponding to the instructed cell identifier is updated and then supplied to the statistical information acquisition unit.
The update opportunity detection unit,
Detecting a handover from the first cell to the second cell by the user apparatus as the update opportunity,
The update instruction unit
The wireless communication system according to claim 1, wherein an update of a statistical information element for the cell identifier of the first cell and the cell identifier of the second cell is instructed based on the update opportunity.
The update opportunity detection unit,
Detecting the arrival of a predetermined time as the update opportunity,
The update instruction unit
The wireless communication system according to claim 1, wherein, based on the update opportunity, an instruction is given to update statistical information elements for all cell identifiers included in the stay information database.
The update opportunity detection unit,
Detecting that the user device is being charged and that the user device is in an inactive state as the update opportunity,
The update instruction unit
The wireless communication system according to claim 1, wherein, based on the update opportunity, an instruction is given to update statistical information elements for all cell identifiers included in the stay information database.
A plurality of base stations each forming a cell identified by a cell identifier;
A stay information database storing a plurality of stay information elements each indicating information on stays in the cell by the user device;
In a wireless communication system comprising: a statistical information database storing a plurality of statistical information elements each calculated based on one or more stay information elements corresponding to one cell identifier;
Detecting an update opportunity that occurs in the user device;
Instructing to update one or more specific cell identifiers or all cell identifiers based on the detected update opportunity;
When updating of one or more specific cell identifiers is instructed, when updating the statistical information element corresponding to the stay information element having the specific cell identifier, while updating all cell identifiers is instructed The information processing method comprising: extracting a plurality of cell identifiers included in the stay information database without duplication, and updating a statistical information element corresponding to the stay information element having the extracted cell identifier.