JP2014158229A - Distribution system and distribution method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a distribution system which can prevent duplicate distribution of emergency information.SOLUTION: A distribution system (1) includes a first distribution server (2a) for extracting first identification information corresponding to the distribution area of a report from identification information of a first group, creating a first report including the first identification information and distribution information and transmitting the first report to a base station, a second distribution server (2b) for extracting second identification information corresponding to the distribution area of a report from identification information of a second group, creating a second report including the second identification information and distribution information and transmitting the second report to a base station, and a base station (5c) for broadcasting the distribution information in a received report to a plurality of terminals located in a cell under control, if the identification information in a received report matches the identification information stored in a third storage unit, when the first and second reports are received.

Description

  The present invention relates to an emergency information delivery system and delivery method.

  In recent years, services that detect or predict the occurrence of a disaster and distribute emergency information via a mobile communication network, the Internet, or the like have been used. As such a service, for example, a service that predicts the arrival of an earthquake wave and distributes an earthquake early warning is known (see, for example, Patent Document 1).

  In the earthquake early warning distribution service, immediately after an earthquake occurs, observation data measured by a seismometer near the epicenter is analyzed by an organization such as the Japan Meteorological Agency. Then, information such as the epicenter and the magnitude (magnitude) of the earthquake is distributed to the user's mobile terminal in the corresponding area (for example, an area having a seismic intensity of 3 or more) via the distribution server. In the portable terminal that has received the information, the occurrence of the earthquake is notified to the user by a pop-up display, a predetermined warning sound, or the like.

  With such a service, the user can recognize the occurrence or arrival of a disaster even when away from home, and can start evacuation and ensuring safety.

  FIG. 5 shows an example of a schematic configuration of a distribution system based on a CBS (Cell Broadcast Service) system.

  When the distribution server (Cell Broadcast Center, CBC) 2 receives an earthquake early warning message from an organization such as the Japan Meteorological Agency (not shown), it creates a message body of the earthquake early warning. That is, with reference to a predetermined table using an “Earthquake Place Name Code” indicating the epicenter included in the emergency earthquake bulletin message as a key, the “Epicenter Name” is extracted and inserted into the message body.

  Next, the distribution server 2 refers to a predetermined table in order to specify the distribution area of the earthquake early warning using a “region code” indicating a region where strong shaking is estimated, which is included in the earthquake early warning message as a key. Then, a “city / town / town identification code” indicating the corresponding city / town / village is extracted. Here, the municipality identification code is a code that uniquely identifies municipalities throughout the country. The distribution server 2 manages a table of information related to the base station 5 arranged in each municipality for each municipality identification code, and refers to this table using the extracted municipality identification code as a key. The station 5 (for example, 5a, 5b) and subordinate cells, the MME (Mobility Management Entity) 4 (for example, 4a) that accommodates the base station 5 and the like are specified.

  Then, the distribution server 2 creates a message including a list (for example, {5a, 5b}) of identification information (ID) of each identified cell, the created message body, etc., and copies the identified MME 4 ( For example, it is transmitted to 4a).

  MME4 (for example, 4a) which received the message transmits the copy of the received message to each base station 5 (for example, 5a-5c) which self accommodates. Further, the base station 5 (for example, 5b) that has received the message, if the cell ID of the subordinate cell is included in the cell ID list included in the received message, The message body included in the received message is broadcast to the portable terminal 6 (for example, 6a).

  With such a configuration, emergency information can be distributed only to portable terminals located in a desired cell. However, since the size of the cell ID list generally increases, there is a problem that the size of the message increases and a load is imposed on the communication network.

  Therefore, the applicant suppresses the size of the emergency information by using the area ID instead of the cell ID and further transmits the number of emergency information by using all the address identification information instead of the address identification information. Proposed a delivery system that delivers emergency information without overloading the communication network.

  FIG. 6 shows an example of a schematic configuration of a distribution system using an area ID.

  When the distribution server 2 receives an earthquake early warning message from an unillustrated organization such as the Japan Meteorological Agency, the distribution server 2 creates a message body of the emergency earthquake early warning. The distribution server 2 also includes a base station 5 (for example, 5a, 5b) belonging to the distribution area of the earthquake early warning, an area r (for example, r1) to which the base station 5 belongs, and an MME 4 (for example, 4a) that accommodates the base station 5. ) Etc. Then, the distribution server 2 creates a message including a list of IDs of each identified area r (for example, {r1}), the created message body, etc., and copies the messages to each identified MME 4 (for example, 4a). Send.

  MME4 (for example, 4a) which received the message transmits the copy of the received message to each base station 5 (for example, 5a-5c) which self accommodates. In addition, the base station 5 (for example, 5b) that has received the message is located in a subordinate cell if the area ID list included in the received message includes the area ID of the area r to which it belongs. The message body included in the received message is broadcast to each portable terminal 6 (for example, 6a).

  With such a configuration, it is possible to distribute emergency information without imposing an excessive load on the communication network.

  Incidentally, in recent years, a technique called network sharing has begun to be used (see, for example, Patent Document 3). Network sharing is a technology for sharing a base station (wireless communication network) of a specific operator by a plurality of operators, and specifications for 3GPP (3rd Generation Partnership Project), a standardization project for mobile communication systems. It is defined in 3GPP TS 23.251 and the like. By using network sharing, the cost of installing infrastructure for a business operator who starts a new mobile communication service is greatly reduced.

  When a mobile terminal is located in a cell of a base station shared by multiple operators, a list indicating PLMN (Public Land Mobile Network) operated by all the operators sharing the base station is displayed as broadcast information on the mobile terminal. Sent. When the PLMN is selected in the portable terminal, a location registration request is transmitted to the core network of the selected PLMN. If the location registration request is allowed in the core network, the mobile terminal can receive the mobile communication service from the operator operating the selected PLMN.

  Consider that emergency information is distributed using an area ID in a communication network having such a configuration. When the technique described in Patent Document 2 is simply applied, the distribution system is as shown in FIG.

  When the distribution server 2a receives an emergency earthquake warning message from an unillustrated organization such as the Japan Meteorological Agency, the distribution server 2a creates a message text of the emergency earthquake warning. In addition, the distribution server 2a includes a base station 5 (for example, 5c) belonging to the distribution area of the emergency earthquake warning, an area r (for example, r2) to which the base station 5 belongs, an MME 4 (for example, 4a) that accommodates the base station 5, and the like. Is identified. Then, the distribution server 2a creates a message including a list of IDs of each identified area r (for example, {r2}), the created message body, etc., and copies the messages to each identified MME 4 (for example, 4a). Send.

  MME4 (for example, 4a) which received the message transmits the copy of the received message to each base station 5 (for example, 5a-5c) which self accommodates. In addition, the base station 5 (for example, 5c) that has received the message is located in a subordinate cell if the area ID list included in the received message includes the area ID of the area r to which the base station 5 belongs. The message body included in the received message is broadcast to each portable terminal 6 (for example, 6a).

  Similarly, when the distribution server 2b receives an emergency earthquake warning message from an unillustrated organization such as the Japan Meteorological Agency, the distribution server 2b creates a message text of the emergency earthquake warning. The distribution server 2b also includes a base station 5 (eg, 5c, 5d) belonging to the emergency earthquake bulletin distribution area, an area r (eg, r2) to which the base station 5 belongs, and an MME 4 (eg, 4b) that accommodates the base station 5. ) Etc. Then, the distribution server 2b creates a message including a list (for example, {r2}) of the ID of each identified area r, the created message body, and the like, and copies the message to each identified MME 4 (for example, 4b). Send.

  MME4 (for example, 4b) which received the message transmits the copy of the received message to each base station 5 (for example, 5c-5e) which self accommodates. In addition, the base station 5 (for example, 5c) that has received the message is located in a subordinate cell if the area ID list included in the received message includes the area ID of the area r to which the base station 5 belongs. The message body included in the received message is broadcast to each portable terminal 6 (for example, 6a).

  With such a configuration, emergency information can be distributed to mobile terminals located in a cell of a base station shared by a plurality of operators. However, the portable terminal has a problem that emergency information is distributed in duplicate.

  In response to such a problem, it is possible to identify the operator related to the emergency information using the PLMN ID. However, in a base station shared by a plurality of operators, all operators sharing the base station are treated as effective, and therefore emergency information cannot be selected with PLMNID. Further, the area ID cannot identify the business operator related to the emergency information.

JP 2012-147117 A Japanese Patent Application No. 2012-281551 JP 2011-130173 A

  The present invention has been made to solve such a problem, and an object of the present invention is to provide a distribution system and a distribution method capable of preventing redundant distribution of emergency information.

  The distribution system according to the present invention is connected to a first distribution server connected to a first communication network operated by a first operator and a second communication network different from the first communication network operated by a second operator. A distribution system comprising at least a second distribution server and a base station connected to the first communication network and the second communication network, wherein the first distribution server has an entire service area wider than the cell of the base station. For the divided areas, a first storage unit that stores the identification information of the first group assigned by the first operator, and the first identification information corresponding to the distribution area of the notification is extracted from the identification information of the first group And a first processing unit that generates a first report including the first identification information and the distribution information and transmits the first report to the base station. The second storage unit that stores the second group identification information that is different from the first group identification information assigned by the second operator, and corresponds to the notification distribution area from among the second group identification information A second processing unit that extracts second identification information, creates a second report including the second identification information and distribution information, and transmits the second report to the base station. A third storage unit that stores identification information of only one of the group identification information and the second group identification information, and the identification information in the received report when the first report or the second report is received And a third processing unit that broadcast-transmits the distribution information in the received notification to a plurality of terminals located in subordinate cells when the identification information stored in the third storage unit matches. Prepare.

  In the distribution system according to the present invention, it is preferable that the identification information of the first group and the identification information of the second group are values belonging to different numerical ranges.

  In the distribution system according to the present invention, the area preferably corresponds to a predetermined administrative district.

  The distribution method according to the present invention is a first distribution server connected to a first communication network operated by a first operator, wherein the entire service area is divided more widely than a cell of a base station. A first distribution server including a first storage unit that stores identification information of a first group assigned by one operator, and a second communication network that is different from the first communication network operated by the second operator; A second distribution server comprising a second storage unit for storing identification information of a second group different from the identification information of the first group assigned by the second operator for the area; A base station connected to the first communication network and the second communication network, and for the area to which the base station belongs, the first group identification information and the second group A base station including a third storage unit that stores identification information of only one of the identification information of the network, and a distribution method in a distribution system, wherein the first distribution server identifies the first group First identification information corresponding to the distribution area of the notification is extracted from the information, a first notification including the first identification information and the distribution information is generated and transmitted to the base station, and the second distribution server The second identification information corresponding to the distribution area of the report is extracted from the identification information of the group, a second report including the second identification information and the distribution information is created and transmitted to the base station. When receiving the 1st report or the 2nd report, when the identification information in the received report matches the identification information stored in the third storage unit, the distribution information in the received report is sent to the subordinate cell. Broadcast to multiple devices in the area .

  The distribution system and the distribution method according to the present invention make it possible to prevent redundant distribution of emergency information by using a plurality of pieces of identification information that differ among providers.

It is a figure which shows an example of schematic structure of a delivery system. It is a figure which shows an example of schematic structure of a delivery server. It is a figure which shows an example of schematic structure of a base station. It is a figure which shows an example of the operation | movement sequence of a delivery system. It is a figure which shows an example of schematic structure of the delivery system by a CBS system. It is a figure which shows an example of schematic structure of the delivery system using area identification information. It is a figure which shows another example of schematic structure of the delivery system using area identification information.

  Hereinafter, various embodiments of the present invention will be described with reference to the drawings. However, it should be noted that the technical scope of the present invention is not limited to these embodiments, and extends to the invention described in the claims and equivalents thereof.

(1) Outline of this embodiment In this embodiment, the entire service area is divided into areas wider than cells (for example, administrative divisions at levels such as prefectures, municipalities, etc.). Each business operator manages a plurality of different (primary) area identification information (ID) and assigns any one of the plurality of area IDs to each area. Each base station belonging to each area stores the area ID assigned by the operator operating itself for the area to which the base station belongs instead of or in addition to the cell ID of the subordinate cell. On the other hand, each distribution server designates an emergency information distribution area by using an area ID managed by an operator operating the distribution server instead of the conventional cell ID.

  In addition, although this embodiment demonstrates the example which assumes provider A and B as a provider, this invention is not limited to this. The number of operators may be three or more.

  Further, an example in which a plurality of integer values belonging to different numerical ranges (for example, 0-4999 for business operator A, 5000-9999 for business operator B, etc.) are used as a plurality of different area IDs. Is not limited to this. As a plurality of different area IDs, for example, a plurality of area IDs according to different systems may be used.

  Moreover, although an example in which an emergency earthquake bulletin is distributed as emergency information will be described, the present invention is not limited to this. As emergency information, for example, information on various disasters such as information on tsunami prediction, typhoon warning, and information on fire may be distributed. Moreover, although CBS is assumed as a delivery system of emergency information, this invention is not limited to this. The delivery method is not limited as long as emergency information can be delivered, and may be, for example, ETWS (Earthquake and Tsunami Warning System), PWS (Public Warning Service), SMS (Short Message Service), or the like.

(2) Configuration of Distribution System 1 FIG. 1 shows an example of a schematic configuration of the distribution system 1.

  The distribution system 1 includes a distribution system operated by each business operator. In each distribution system, exchanges (not shown) are connected to each other via a communication network 3 that is a wide area communication network. The exchange connects a wireless communication network covering a certain area to the communication network 3. In the wireless communication network, a plurality of base stations 5 are arranged so as to manage a wireless zone covering the area. The base station 5 includes one that is occupied by a business operator that operates the base station 5 (for example, the base station 5a) and one that is shared with another business operator (for example, the base station 5c). Each base station 5 is connected to an exchange via an MME 4 that accommodates itself. Then, when the mobile terminal 6 in a certain area communicates with other mobile terminals 6 in and out of the area, the mobile terminal 6 is connected to the MME 4 via the base station 5 and further connected to the exchange, and Connected to the communication network 3.

  The communication network 3 is connected to a distribution server 2 that distributes earthquake early warnings. When the distribution server 2 receives an earthquake early warning message from an organization such as the Japan Meteorological Agency (not shown), the distribution server 2 identifies the emergency earthquake bulletin distribution area and sends the earthquake early warning to each mobile terminal 6 located in the identified distribution area. It has a function to distribute.

(2.1) Configuration of Distribution Server 2 FIG. 2A shows an example of a schematic configuration of the distribution server 2.

  The distribution server 2 specifies a distribution area of the earthquake early warning, creates and distributes the earthquake early warning, and the like. For this purpose, the distribution server 2 includes a communication unit 21, a storage unit 22, and a processing unit 23.

  The communication unit 21 includes a communication interface circuit for connecting the distribution server 2 to the communication network 3, and performs communication with the communication network 3. Then, the communication unit 21 supplies data received from the MME 4, the base station 5, the mobile terminal 6, and the like to the processing unit 23. In addition, the communication unit 21 transmits the data supplied from the processing unit 23 to the MME 4, the base station 5, the mobile terminal 6, and the like.

  The storage unit 22 includes, for example, at least one of a magnetic tape device, a magnetic disk device, and an optical disk device. The storage unit 22 stores an operating system program, a driver program, an application program, data, and the like used for processing in the processing unit 23. For example, the storage unit 22 stores, as an application program, an application program that distributes the earthquake early warning. In addition, the storage unit 22 includes, as data, a place name code indicating the correspondence between the place name code and the place name, a place name correspondence table, and a region code indicating the correspondence between the area code and the city / town / village identification code / city / town / town / town identification. A code correspondence table, a base station management table for managing information related to the base station 5 (FIGS. 2B and 2C), and the like are stored. Furthermore, the storage unit 22 may temporarily store temporary data related to a predetermined process.

  2B and 2C show an example of the base station management table. FIG. 2B shows what is related to the distribution server 2a, and FIG. 2C shows what is related to the distribution server 2b. In the base station management table, for each base station 5, the base station ID of the base station 5, the city identification code of the city where the base station 5 is located, the area ID of the area r to which the base station 5 belongs, the base The MMEID of the MME 4 that houses the station 5 is included. 2B and 2C, for example, in the area r to which the base stations 5c and 5d belong, “2” is assigned by the operator A and “5002” is assigned by the operator B as the area ID. I understand that.

  The processing unit 23 includes one or a plurality of processors and their peripheral circuits. The processing unit 23 controls the overall operation of the distribution server 2 and is, for example, a CPU (Central Processing Unit). The processing unit 23 controls the operation of the communication unit 21 and the like so that various processes of the distribution server 2 are executed in an appropriate procedure according to a program stored in the storage unit 22. The processing unit 23 executes processing based on programs (operating system program, driver program, application program, etc.) stored in the storage unit 22. The processing unit 23 can execute a plurality of programs (such as application programs) in parallel.

(2.1.1) Configuration of the processing unit 23 of the distribution server 2 The processing unit 23 includes at least the distribution unit 231. Each of these units is a functional module implemented by a program executed on a processor included in the processing unit 23. Alternatively, each of these units may be implemented in the distribution server 2 as firmware.

  The distribution unit 231 identifies an emergency earthquake warning distribution area, creates and distributes an emergency earthquake warning, etc., upon receipt of an emergency earthquake warning message. That is, when an emergency earthquake warning message is received from an organization such as the Japan Meteorological Agency, the distribution unit 231 analyzes the received emergency earthquake warning message and identifies the epicenter name code and the area code. Further, the distribution unit 231 extracts a corresponding place name by referring to the place name code-place name correspondence table stored in the storage unit 22 using the identified epicenter place code as a key. And the delivery part 231 inserts the extracted place name into the message text of the earthquake early warning.

  Next, the distribution unit 231 extracts a corresponding city / town / town identification code by referring to the area code / city / town / town / town / town identification code correspondence table stored in the storage unit 22 using the identified area code as a key. Also, the distribution unit 231 extracts the corresponding base station ID, area ID, and MMEID by referring to the base station management table stored in the storage unit 22 using the extracted municipality specific code as a key.

  Then, the distribution unit 231 creates a message including the extracted area ID list, the created message body, and the like, and transmits a copy to the MME 4 corresponding to each extracted MMEID. A copy of the message transmitted to the MME 4 is transmitted to each base station 5 accommodated by the MME 4.

(2.2) Configuration of Base Station 5 FIG. 3A shows an example of a schematic configuration of the base station 5 that is occupied by a business operator that operates the base station 5.

  The base station 5 determines whether or not the earthquake early warning distribution belongs to the area, receives the earthquake early warning, and transmits the broadcast. For this purpose, the base station 5 includes a first communication unit 51, a second communication unit 52, a storage unit 53, and a processing unit 54.

  The first communication unit 51 includes a communication interface circuit for connecting the base station 5 to the MME 4 operated by an operator operating itself, and performs communication with the MME 4. Then, the first communication unit 51 supplies the data received from the MME 4 to the processing unit 54. In addition, the first communication unit 51 transmits the data supplied from the processing unit 54 to the MME 4.

  The second communication unit 52 includes a communication interface circuit including an antenna whose sensitivity band is the 2.1 GHz band, and performs wireless communication with the mobile terminal 6. Then, the second communication unit 52 supplies the data received from the mobile terminal 6 to the processing unit 54. In addition, the second communication unit 52 transmits the data supplied from the processing unit 54 to the mobile terminal 6.

  The storage unit 53 includes, for example, at least one of a semiconductor memory, a magnetic disk device, and an optical disk device. The storage unit 53 stores an operating system program, a driver program, an application program, data, and the like used for processing in the processing unit 54. For example, the storage unit 53 stores, as an application program, an application program that receives and transmits an emergency earthquake warning. In addition, the storage unit 53 stores, as data, its own base station ID, the cell ID of the subordinate cell, the area ID (FIG. 3C) assigned by the operator operating itself for the area r to which it belongs. . Furthermore, the storage unit 53 may temporarily store temporary data related to a predetermined process.

  The processing unit 54 includes one or a plurality of processors and their peripheral circuits. The processing unit 54 controls the overall operation of the base station 5 and is, for example, a CPU (Central Processing Unit). The processing unit 54 performs operations of the first communication unit 51, the second communication unit 52, and the like so that various processes of the base station 5 are executed in an appropriate procedure according to a program or the like stored in the storage unit 53. Control. The processing unit 54 executes processing based on programs (operating system program, driver program, application program, etc.) stored in the storage unit 53. The processing unit 54 can execute a plurality of programs (such as application programs) in parallel.

(2.2.1) Configuration of the processing unit 54 of the base station 5 The processing unit 54 includes at least a broadcast transmission unit 541. Each of these units is a functional module implemented by a program executed on a processor included in the processing unit 54. Alternatively, each of these units may be implemented in the base station 5 as firmware.

  The broadcast transmission unit 541 is triggered by the reception of the earthquake early warning, and determines whether or not the earthquake early warning is distributed to the distribution area, and transmits the earthquake early warning broadcast. That is, when the earthquake early warning is received from the MME 4 via the first communication unit 51, the broadcast transmission unit 541 analyzes the message and specifies the area ID list and the message text. The broadcast transmission unit 541 determines whether or not the area ID stored in the storage unit 53 is included in the specified area ID list. Then, when the area ID is included in the area ID list, the broadcast transmission unit 541 similarly transmits the specified message body to each cell located in the subordinate cell via the second communication unit 52. Broadcast transmission to the terminal 6.

(2.3) Configuration of Base Station 5 ′ FIG. 3B shows an example of a schematic configuration of the base station 5 ′ shared with other operators.

  The base station 5 ′ determines whether or not the earthquake early warning is attached to the distribution area, receives the earthquake early warning, and transmits the broadcast. For this purpose, the base station 5 ′ includes a first communication unit 51, a second communication unit 52, a storage unit 53, a processing unit 54 ′, a third communication unit 55, and a fourth communication unit 56. Of these units, the first communication unit 51, the second communication unit 52, and the storage unit 53 are the same as those shown in FIG.

  The third communication unit 55 includes a communication interface circuit for connecting the base station 5 ′ to the MME 4 ′ operated by another operator, and performs communication with the MME 4 ′. Then, the third communication unit 55 supplies the data received from the MME 4 'to the processing unit 54'. The third communication unit 55 transmits the data supplied from the processing unit 54 'to the MME 4'.

  The fourth communication unit 56 includes a communication interface circuit including an antenna whose sensitivity band is the 1.7 GHz band, and performs wireless communication with the mobile terminal 6. Then, the fourth communication unit 56 supplies the data received from the mobile terminal 6 to the processing unit 54 '. Further, the fourth communication unit 56 transmits the data supplied from the processing unit 54 ′ to the mobile terminal 6.

  FIG. 3C shows an example of the area ID stored in the storage unit 53 of each base station 5, 5 '. From FIG. 3C, for example, the storage unit 53 of the base station 5c, which is a base station operated by the operator A and shared with the operator B, stores the operator A as the area ID. It can be seen that “2” assigned by is stored.

  The processing unit 54 ′ includes one or a plurality of processors and their peripheral circuits. The processing unit 54 ′ controls the overall operation of the base station 5 ′, and is, for example, a CPU (Central Processing Unit). The processing unit 54 ′ performs the first communication unit 51, the second communication unit 52, the second communication unit 52 ′ so that various processes of the base station 5 ′ are executed in an appropriate procedure according to a program stored in the storage unit 53. The operations of the third communication unit 55 and the fourth communication unit 56 are controlled. The processing unit 54 ′ executes processing based on programs (operating system program, driver program, application program, etc.) stored in the storage unit 53. Further, the processing unit 54 ′ can execute a plurality of programs (application programs or the like) in parallel.

(2.3.1) Configuration of the processing unit 54 ′ of the base station 5 ′ The processing unit 54 ′ includes at least a broadcast transmission unit 541 ′. Each of these units is a functional module implemented by a program executed on a processor included in the processing unit 54 ′. Alternatively, these units may be implemented in the base station 5 ′ as firmware.

  The broadcast transmission unit 541 ′, when receiving the earthquake early warning, determines whether or not it belongs to the distribution area of the earthquake early warning, transmits the earthquake early warning, and the like. That is, when the earthquake early warning is received from the MME 4 via the first communication unit 51, the broadcast transmission unit 541 'analyzes the message and specifies the area ID list and the message text. The broadcast transmission unit 541 ′ determines whether or not the area ID stored in the storage unit 53 is included in the specified area ID list. When the area ID is included in the area ID list, the broadcast transmission unit 541 ′ uses the same message body specified in each cell located in the subordinate cell via the second communication unit 52. Broadcast transmission to the portable terminal 6.

  Similarly, when the earthquake early warning is received from the MME 4 ′ via the third communication unit 55, the broadcast transmission unit 541 ′ analyzes the message and specifies the area ID list and the message text. The broadcast transmission unit 541 ′ determines whether or not the area ID stored in the storage unit 53 is included in the specified area ID list. When the area ID is included in the area ID list, the broadcast transmission unit 541 ′ uses the same message body specified in each cell located in the subordinate cell via the fourth communication unit 56. Broadcast transmission to the portable terminal 6.

(3) Operation of Distribution System 1 FIG. 4 shows an example of an operation sequence of the distribution system 1. Note that the operation sequence described below is based on the programs stored in the storage unit 22 and the storage unit 53 in advance, mainly by the processing unit 23 and the processing units 54 and 54 ′, and the distribution server 2, MME4, 4 ′. And in cooperation with each element of the base stations 5, 5 '.

  The distribution unit 231 of each distribution server 2 waits for reception of an emergency earthquake warning message.

  When the emergency earthquake warning message is received from an organization such as the Japan Meteorological Agency, the distribution unit 231 analyzes the received emergency earthquake warning message to identify the epicenter name code and the area code. In addition, the distribution unit 231 specifies a place name based on the specified epicenter place name code. And the delivery part 231 produces the message text of the earthquake early warning based on the specified place name (steps S400 and S420).

Next, the distribution unit 231 specifies the city / town / village identification code based on the similarly specified area code. Further, the distribution unit 231 specifies the base station ID, the area ID, and the MMEID based on the specified city / town / village identification code (steps S402 and S422).
For example, assuming that “c2” is specified as the municipality specifying code and the base station management table shown in FIG. 2B is referred to, “5c” is set as the base station ID and “2” is set as the area ID. However, “4a” is specified as the MMEID.
Similarly, if the base station management table shown in FIG. 2C is referred to, “5c” and “5d” are specified as the base station ID, “5002” is specified as the area ID, and “4b” is specified as the MMEID. The

Then, the distribution unit 231 creates a message including the extracted area ID list, the created message body, and the like, and transmits a copy thereof to the MMEs 4 and 4 ′ corresponding to the extracted MMEIDs (steps S404 and S424). .
For example, if “2” is specified as the area ID and “4a” is specified as the MMEID, a message {area ID = 2, body text} is created, and a copy thereof is transmitted to the MME 4a corresponding to the MME ID “4a”. .
Similarly, if “5002” is specified as the area ID and “4b” is specified as the MMEID, a message {area ID = 5002, body text} is created, and a copy thereof is transmitted to the MME 4b corresponding to the MME ID “4b”. The

  When receiving the earthquake early warning from the distribution server 2, the MME 4, 4 ′ transmits a copy of the message to each base station 5, 5 ′ accommodated therein (steps S 406, S 408, S 410, S 426, S 428). , S432). For example, the MME 4a transmits to the base stations 5a to 5c, and the MME 4b transmits to the base stations 5c to 5e.

  When the earthquake early warning is received from the MME 4 via the first communication unit 51, the broadcast transmission units 541 and 541 'analyze the message and specify the area ID list and the message text. Also, the broadcast transmission units 541 and 541 'determine whether or not the area ID stored in the storage unit 53 is included in the specified area ID list. Then, when the area ID is included in the area ID list, the broadcast transmission units 541 and 541 ′ locate the specified message body in the subordinate cell via the second communication unit 52. Broadcast transmission is performed to each portable terminal 6 (steps S412 and S430).

  Similarly, when the earthquake early warning is received from the MME 4 ′ via the third communication unit 55, the broadcast transmission unit 541 ′ analyzes the message and specifies the area ID list and the message text. The broadcast transmission unit 541 ′ determines whether or not the area ID stored in the storage unit 53 is included in the specified area ID list. When the area ID is included in the area ID list, the broadcast transmission unit 541 ′ uses the same message body specified in each cell located in the subordinate cell via the fourth communication unit 56. Broadcast transmission to the portable terminal 6.

For example, assuming that “2” is stored as the area ID in the base station 5c shared by a plurality of carriers and a message {area ID = 2, text} is received, the area ID is in the area ID list. Therefore, the message body is broadcast to each mobile terminal 6 residing in the subordinate cell.
Similarly, if a message {area ID = 5002, text} is received, this message is discarded because the area ID is not included in the area ID list.
As described above, the emergency earthquake bulletin is not redundantly distributed to each mobile terminal 6 located in the cell of the base station 5 ′ shared by a plurality of operators.

  As described above, by using a plurality of area IDs that differ among operators, it is possible to prevent redundant distribution of emergency earthquake early warnings.

  Note that the present invention is not limited to this embodiment. For example, in the present embodiment, the present invention is applied to the fourth generation mobile communication system, but may be applied to mobile communication systems of other generations (for example, second generation, third generation, etc.).

  In the present embodiment, the base station 5 ′ shared by a plurality of operators stores the area ID assigned by the operator operating itself for the area r to which the base station 5 ′ belongs. The allocated area ID may be stored.

  A computer program for causing a computer to realize the functions of the processing unit 23 and the processing units 54 and 54 'is provided in a form recorded on a computer-readable recording medium such as a magnetic recording medium or an optical recording medium. May be.

  It should be understood by those skilled in the art that various changes, substitutions and modifications can be made thereto without departing from the spirit and scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Distribution system 2 Distribution server 21 Communication part 22 Storage part 23 Processing part 231 Distribution part 3 Communication network 4 MME
5 base station 51 first communication unit 52 second communication unit 53 storage unit 54 processing unit 541 broadcast transmission unit 55 third communication unit 56 fourth communication unit 6 portable terminal

Claims (4)

A first distribution server connected to a first communication network operated by a first operator, a second distribution server connected to a second communication network different from the first communication network operated by a second operator, And a distribution system comprising at least a base station connected to the first communication network and the second communication network,
The first distribution server is
A first storage unit that stores identification information of a first group assigned by the first operator for an area in which the entire service area is broadly divided from the cell of the base station;
First identification information corresponding to the distribution area of the notification is extracted from the identification information of the first group, and a first notification including the first identification information and distribution information is generated and transmitted to the base station. 1 processing unit,
The second distribution server is
For the area, a second storage unit that stores identification information of a second group different from the identification information of the first group assigned by the second operator;
The second identification information corresponding to the distribution area of the notification is extracted from the identification information of the second group, and a second notification including the second identification information and the distribution information is generated and transmitted to the base station. 2 processing units,
The base station
A third storage unit that stores only one of the identification information of the first group and the identification information of the second group for the area to which the device belongs;
When the first notification or the second notification is received and the identification information in the received notification matches the identification information stored in the third storage unit, the distribution information in the received notification is A third processing unit that broadcasts to a plurality of terminals located in subordinate cells,
A distribution system characterized by that.   The distribution system according to claim 1, wherein the identification information of the first group and the identification information of the second group are numerical values belonging to different numerical ranges.   The distribution system according to claim 1, wherein the area corresponds to a predetermined administrative division. A first distribution server connected to a first communication network operated by a first operator, which is allocated by the first operator for an area in which the entire service area is broadly divided from the cell of the base station. A first distribution server comprising a first storage unit for storing identification information of the first group;
A second distribution server connected to a second communication network different from the first communication network operated by a second operator, the first group assigned by the second operator for the area A second distribution server comprising a second storage unit that stores identification information of a second group different from the identification information of
A base station connected to the first communication network and the second communication network, and only one of the identification information of the first group and the identification information of the second group for the area to which the base station belongs A base station comprising a third storage unit for storing identification information;
A delivery method in a delivery system comprising at least
The first distribution server extracts first identification information corresponding to a distribution area of the notification from the identification information of the first group, and creates a first notification including the first identification information and the distribution information. Transmit to the base station,
The second distribution server extracts second identification information corresponding to the distribution area of the notification from the identification information of the second group, and creates a second notification including the second identification information and the distribution information. Transmit to the base station,
When the base station receives the first notification or the second notification, the notification received when the identification information in the received notification matches the identification information stored in the third storage unit Broadcast information to multiple devices located in the subordinate cell,
A distribution method characterized by that.

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