JP2010263587A - Mobile communication method and mobile station - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problems which are likely to occur when predetermined false information is produced and transmitted by a malicious third person. <P>SOLUTION: A method includes: a process "A" of transmitting predetermined information including identification information for identifying a transmission source and a type of notification information, a serial number of the notification information, and the notification information; a process "B" of determining whether or not the same combination as combination of the identification information, the serial number, and the notification information which are included in received predetermined information, are stored in a predetermined memory unit 22A by a mobile station "UE"; a process "C" of discarding the received notification information when the mobile station "UE" determines that the combination is stored; and a process "D" of transferring the received notification information to an application function unit 23 when the mobile station "UE" determines that the combination is not stored, and storing the combination of the identification information, the serial number, and the notification information in the predetermined memory unit 22A. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a mobile communication method and a mobile station.

  In 3GPP, “ETWS (Earthquake and Tsunami Warning System)” configured to notify the mobile station UE of emergency information such as tsunami information and earthquake information is defined.

  In such ETWS, radio access networks such as “UTRAN (UMTS Terrestrial Radio Access Network)” and “E-UTRAN (Evolved UMTS Terrestrial Radio Access Network)” are used as predetermined information (for example, broadcast information MC and R). The emergency information is repeatedly transmitted via the network.

  Here, in addition to the above emergency information, the predetermined information includes a message ID for identifying the source and type of the emergency information, a serial number of the emergency information, and the like.

  Whether the mobile station UE receives the emergency information, the message ID, and the serial number via the predetermined information, and stores the same combination as the combination of the received message ID and the serial number in the predetermined storage unit. It is configured to determine whether or not.

  If the mobile station UE determines that the combination is stored in the predetermined storage unit, the mobile station UE determines that the received emergency information has already been received once, and discards the received emergency information. If it is determined that the combination of the emergency information, the message ID, and the serial number is not stored, it is determined that the emergency information is new emergency information, and the emergency information is stored in the mobile station UE. The information is transferred to an application function unit (application layer), and the combination of the message ID and serial number is stored in a predetermined storage unit.

  The operation of the mobile station UE is called “Duplication Detection”.

3GPP TS25.331 v8.5.0 3GPP TS36.331 v8.5.0 3GPP TS23.041 v8.2.0

  As described above, since the emergency information can be uniquely specified by the combination of the message ID and the serial number, there is no problem if the mobile station UE performs “Duplication Detection” based on the combination of the message ID and the serial number. It was thought.

  However, after a malicious third party intercepts regular predetermined information including the message ID, serial number, and regular emergency information, the false predetermined information including the message ID, the serial number, and false emergency information. The present applicant has found that the following problems may occur when generating and transmitting a message.

  Specifically, the mobile station UE determines that the combination of the message ID and serial number included in the false predetermined information is related to the new emergency information, and stores the combination in the predetermined storage unit In this case, the combination of the message ID and the serial number is already stored in the predetermined storage unit even when the regular predetermined information including the message ID and the serial number and the regular emergency information is received. Therefore, the present applicant has found that there is a problem that the normal emergency information, the message ID, and the serial number are discarded and the normal emergency information cannot be output.

  Therefore, the present invention has been made in view of the above-described problems, and an object thereof is to provide a mobile communication method and a mobile station that can solve the above-described problems.

  A first feature of the present invention is a mobile communication method for transmitting notification information to a mobile station, the identification information for identifying the source and type of the notification information, the serial number of the notification information, and the Step A of transmitting predetermined information including notification information, and the mobile station, in a predetermined storage unit, the same combination as the combination of the identification information, the serial number, and the notification information included in the received predetermined information Step B for determining whether or not it is stored; Step C for discarding the received notification information when the mobile station determines that the same combination is stored; and When it is determined that the same combination is not stored, the received notification information is transferred to an application function unit inside the mobile station, and the identification information and the predetermined information are stored in the predetermined storage unit. And summarized in that a step D of storing a combination of the real number and the notification information.

  A second feature of the present invention is a mobile station that receives notification information, identification information for identifying a source and type of the notification information, a serial number of the notification information, and predetermined information including the notification information Whether the same combination as the combination of the identification information, the serial number, and the notification information included in the received predetermined information is stored in the receiving unit configured to receive A determination unit configured to determine whether or not the determination unit stores the same combination, the received notification information is discarded, and the same combination is determined. If it is determined that it is not stored, the received notification information is transferred to the application function unit inside the mobile station, and the identification information, the serial number, and the And summarized in that it is configured to store a combination of the broadcast information.

  As described above, according to the present invention, there is provided a mobile communication method and a mobile station capable of solving problems that may occur when false predetermined information is generated and transmitted by a malicious third party. be able to.

1 is an overall configuration diagram of a mobile communication system according to a first embodiment of the present invention. FIG. 3 is a functional block diagram of a radio base station according to the first embodiment of the present invention. It is a figure which shows an example of the paging message transmitted by the wireless base station which concerns on the 1st Embodiment of this invention. It is a figure which shows an example of SIB10 transmitted by the wireless base station which concerns on the 1st Embodiment of this invention. It is a figure which shows an example of SIB11 transmitted by the wireless base station which concerns on the 1st Embodiment of this invention. FIG. 3 is a functional block diagram of a mobile station according to the first embodiment of the present invention. 3 is a flowchart showing an operation of the mobile station according to the first embodiment of the present invention. It is a whole block diagram of the mobile communication system which concerns on the 2nd Embodiment of this invention. It is a functional block diagram of the radio network controller according to the second embodiment of the present invention. It is a figure which shows an example of the "PAGING TYPE 1" transmitted by the radio network controller concerning the 2nd Embodiment of this invention. It is a figure which shows an example of the information element "ETWS information" contained in "PAGING TYPE 1" transmitted by the radio network controller which concerns on the 2nd Embodiment of this invention. It is a figure which shows an example of "SYSTEM INFORMATION CHANGE INDICATION" transmitted by the radio network controller which concerns on the 2nd Embodiment of this invention. It is a figure which shows an example of "ETWS PRIMARY NOTIFICATION WITH SECURITY" transmitted by the radio network controller which concerns on the 2nd Embodiment of this invention. It is a figure which shows an example of the information element "ETWS warning security information" contained in "ETWS PRIMARY NOTIFICATION WITH SECURITY" transmitted by the radio network controller which concerns on the 2nd Embodiment of this invention. It is a sequence diagram which shows operation | movement of the mobile communication system which concerns on the 2nd Embodiment of this invention. It is a flowchart which shows operation | movement of the mobile station which concerns on the 2nd Embodiment of this invention.

(Configuration of mobile communication system according to the first embodiment of the present invention)
With reference to FIG. 1 thru | or FIG. 6, the structure of the mobile communication system which concerns on the 1st Embodiment of this invention is demonstrated.

  As shown in FIG. 1, the mobile communication system according to the present embodiment is a mobile communication system having E-UTRAN as a radio access network. Specifically, the mobile communication system according to the present embodiment includes a server CBC (Cell Broadcast Center) that provides CBS (Cell Broadcast Service), an exchange MME, and a radio base station eNB.

  The mobile communication system according to the present embodiment is configured to transmit “ETWS notification (ETWS notification information)” to a mobile station UE located in a subordinate cell.

  The “ETWS notification” is notification information for notifying the mobile station UE of emergency information (for example, tsunami information, earthquake information, etc.) received from a server of a predetermined organization such as a local government. “ETWS primary notification” And “ETWS secondary notification”.

  For example, “ETWS primary notification” is notification information for notifying minimum information about the above emergency information, and “ETWS secondary notification” is notification for notifying detailed information about the above emergency information. It may be information.

  As illustrated in FIG. 2, the radio base station eNB includes an ETWS notification information receiving unit 11, a paging message transmitting unit 12, and a broadcast information transmitting unit 13.

  The ETWS notification information receiving unit 11 is configured to receive emergency information to be notified in ETWS, which is distributed from a server of a predetermined organization such as a local government, from the exchange MME.

  The paging message transmission unit 12 is configured to transmit a paging message to the mobile station UE. FIG. 3 shows an example of the format of such a paging message.

  “Etws-Indication” illustrated in FIG. 3 is an indicator indicating that at least one of “ETWS primary notification” or “ETWS secondary notification” is transmitted.

  That is, when the ETWS notification information receiving unit 11 receives emergency information to be notified in the ETWS, which is delivered from a server of a predetermined organization such as a local government, from the exchange MME, the paging message transmission unit 12 A paging message with “Indication” set to “ON” is transmitted.

  The broadcast information transmission unit 13 is configured to transmit broadcast information to the mobile station UE.

  Specifically, the broadcast information transmitting unit 13 obtains “message ID (identification information)”, “serial number” of “ETWS notification”, and “ETWS notification” for identifying the source and type of “ETWS notification”. The broadcast information (predetermined information) that is included is configured to be transmitted.

  Here, the broadcast information transmission unit 13 transmits “ETWS primary notification” via “SIB10 (System Information Block 10)” which is broadcast information, and transmits “SIB11 (System Information Block 11)” which is broadcast information. Over the network, and is configured to transmit “ETWS secondary notification”.

  FIG. 4 shows an example of the format of SIB10, and FIG. 5 shows an example of the format of SIB11.

  As shown in FIG. 4, a “messageIdentifier” field, a “serialNumber” field, a “warningType” field, and a “warningSecurityInfo” field are defined in the SIB 10.

  In the “messageIdentifier” field, a “message ID (identification information)” for identifying the source of the “ETWS primary notification” (such as server identification information of a predetermined organization) and the type (eg, tsunami information or earthquake information). Is set.

  In addition, a serial number of “ETWS primary notification” is set in the “serialNumber” field. The serial number is updated each time the content of “ETWS primary notification” is changed.

  In addition, “ETWS primary notification” is set in the “warningType” field.

  Further, security information is set in the “warningSecurityInfo” field. Here, the security information may be a digital signature given to the SIB 10 or other information. Note that setting security information in the “warningSecurityInfo” field is an option.

  5, the SIB 11 includes a “messageIdentifier” field, a “serialNumber” field, a “warningMessageSegmentTypeType” field, a “warningMessageSegmentNumberNumber” field, a “warningMessageSegment” field, and a “warningMessageSegment” field.

  In the “messageIdentifier” field, a “message ID (identification information)” for identifying the source of the “ETWS secondary notification” (identification information of the server of a predetermined organization) and the type (eg, tsunami information, earthquake information, etc.) Is set.

  In addition, a serial number of “ETWS secondary notification” is set in the “serialNumber” field. The serial number is updated each time the content of “ETWS secondary notification” is changed.

  Since “ETWS secondary notification” has a larger data amount than “ETWS primary notification”, it is divided into a plurality of segments and notified by a plurality of SIBs 11.

  Therefore, information indicating whether each segment is the last segment of one “ETWS secondary notification” is set in the “warningMessageSegmentType” field.

  In the “warningMessageSegmentNumber” field, the segment number of each segment is set.

  Furthermore, “ETWS secondary notification” divided into each segment is set in the “warningMessageSegment” field.

  Also, in the “dataCodingScheme” field, “coding scheme” applied to “ETWS secondary notification” is set.

  As shown in FIG. 6, the mobile station UE includes a receiving unit 21, a determining unit 22, a storage unit 22A, and an application function unit 23.

The receiving unit 21 is configured to receive a paging message or broadcast information (predetermined information) transmitted by the radio base station eNB. Specifically, the receiving unit 21 is transmitted by the radio base station eNB. A paging message is received, and when “ON” is set in “ets-Indication” in the paging message, the SIB 10 and the SIB 11 are received.

  In addition, the reception unit 21 is configured to restore the “ETWS secondary notification” from the plurality of segments transmitted by the plurality of SIBs 11 when the “ETWS secondary notification” is divided into a plurality of segments and transmitted. Yes.

  The storage unit 22 </ b> A is configured to store a combination of “message ID”, “serial number”, and “ETWS notification” newly received by the reception unit 21.

  The storage unit 22A may be configured to store a combination of “message ID”, “serial number”, “ETWS notification”, and “security information” newly received by the reception unit 21.

  The storage unit 22A may be configured to store a combination of “message ID”, “serial number”, “ETWS notification”, and “coding scheme” newly received by the reception unit 21.

  Further, the storage unit 22A stores the hash value generated based on the “message ID”, “serial number”, and “ETWS notification”, or “message ID”, “serial number”, “ETWS notification”, and “security information”. Or a hash value generated based on “message ID”, “serial number”, “ETWS notification”, and “coding scheme” may be stored. .

  The storage unit 22A stores a hash value generated based only on “ETWS notification” or only on “ETWS notification” and “security information”, and stores other information (“message ID” and “serial number”). Or “coding scheme”) may be configured to store the value itself.

  When the receiving unit 21 receives SIB10 or SIB11, the determination unit 22 stores the “message ID”, “serial number”, and “ETWS” included in the SIB10 or SIB11 received by the receiving unit 21 in the storage unit 22A. It is configured to determine whether or not the same combination as “notification” is stored.

  When “security information” is included in the SIB 10, the determination unit 22 stores the “message ID” and “serial number” included in the SIB 10 or SIB 11 received by the reception unit 21 in the storage unit 22 A. It may be configured to determine whether or not the same combination as the combination of “ETWS notification” and “security information” is stored.

  The determination unit 22 has the same combination as the combination of “message ID”, “serial number”, “ETWS notification”, and “coding scheme” included in the SIB 11 received by the reception unit 21 in the storage unit 22A. It may be configured to determine whether or not is stored.

  For example, the determination unit 22 determines whether or not the same combination as the combination of “message ID”, “serial number”, and “ETWS primary notification” included in the received SIB 10 is stored in the storage unit 22A. Is configured to do.

  Here, when “security information” is included in the SIB 10, the determination unit 22 stores the “message ID”, “serial number”, and “ETWS” included in the SIB 10 received by the reception unit 21 in the storage unit 22A. It may be configured to determine whether or not the same combination as the combination of “primary notification” and “security information” is stored.

  Further, the determination unit 22 determines whether or not the same combination as the combination of “message ID”, “serial number”, and “ETWS secondary notification” included in the received SIB 11 is stored in the storage unit 22A. Is configured to do.

  Here, the determination unit 22 stores the same combination as the combination of “message ID”, “serial number”, “ETWS secondary notification”, and “coding scheme” included in the received SIB 11 in the storage unit 22A. It may be configured to determine whether or not.

  In addition, “security information” may be included in “ETWS secondary notification”.

  Here, when the “ETWS secondary notification” is divided into a plurality of segments and transmitted, the determination unit 22 uses the “ETWS secondary notification” restored by the reception unit 21 to perform the above determination. It is configured.

  The determination unit 22 is the same as the hash value generated based on the “message ID”, “serial number”, and “ETWS notification” included in the SIB 10 or SIB 11 received by the reception unit 21 in the storage unit 22A. The same combination as the combination of “message ID”, “serial number”, and “ETWS notification” included in the received predetermined information is stored in the storage unit 22A by determining whether or not the hash value is stored. It may be configured to determine whether or not is stored.

  Alternatively, the determination unit 22 generates the hash generated based on the “message ID”, “serial number”, “ETWS notification”, and “security information” included in the SIB 10 received by the reception unit 21 in the storage unit 22A. By determining whether or not the same hash value is stored, the “message ID”, “serial number”, “ETWS notification” and “security information” included in the received predetermined information are stored in the storage unit 22A. It may be configured to determine whether or not the same combination as “” is stored.

  Alternatively, the determination unit 22 generates the hash generated based on the “message ID”, “serial number”, “ETWS notification”, and “coding scheme” included in the SIB 11 received by the reception unit 21 in the storage unit 22A. By determining whether or not the same hash value as the value is stored, the “message ID”, “serial number”, “ETWS notification”, and “coding scheme” included in the received predetermined information are stored in the storage unit 22A. It may be configured to determine whether or not the same combination as “” is stored.

  The hash value used by the determination unit 22 for the determination may be generated only based on “ETWS notification” or only based on “ETWS notification” and “security information”. The information itself (“message ID”, “serial number”, “coding scheme”) may be the value itself.

  If the determination unit 22 determines that the above combination is stored in the storage unit 22A, the received “ETWS primary notification” is discarded, and if it is determined that the above combination is not stored, The received “ETWS primary notification” and “security information (if included in the SIB 10)” are transferred to the application function unit 23, and the “message ID”, “serial number”, and “ETWS primary” are stored in the storage unit 22A. The combination of “notification” and “security information (when included in the SIB 10)” is stored.

  If the determination unit 22 determines that the above combination is stored in the storage unit 22A, the received “ETWS secondary notification” is discarded, and if the determination unit 22 determines that the above combination is not stored, The received “ETWS secondary notification” is transferred to the application function unit 23, and the combination of “message ID”, “serial number”, “ETWS secondary notification” and “coding scheme” is stored in the storage unit 22A. It is configured.

  Here, the reception unit 21 and the determination unit 22 may operate so as to realize the RRC layer function.

  The application function unit 23 operates so as to realize a NAS (Non-Access Stratum) layer function.

  The application function unit 23 is configured to verify the validity of “ETWS primary notification” and “ETWS secondary notification” transferred by the determination unit 22.

  Further, the application function unit 23 is configured to perform output processing for “ETWS primary notification” or “ETWS secondary notification” whose validity has been confirmed, for example, display processing from a display or output processing from a speaker. ing.

(Operation of the mobile communication system according to the first embodiment of the present invention)
Hereinafter, the operation of the mobile communication system according to the present embodiment, in particular, the operation of the mobile station according to the present embodiment will be described with reference to FIG.

  As illustrated in FIG. 7, in step S101, the reception unit 21 refers to “etc-indication” in the received paging message and determines whether “ETWS primary notification” or “ETWS secondary notification” is transmitted. Judge about.

  If it is determined that it has not been transmitted, this operation repeats the operation of step S101. If it is determined that it has been transmitted, this operation proceeds to step S102.

  In step S102, the mobile station UE receives SIB10 or SIB11 transmitted by the radio base station eNB.

  In step S103, the determination unit 22 stores the same combination as the combination of “message ID”, “serial number”, and “ETWS notification” included in the received SIB10 or SIB11 in the storage unit 22A. It is determined whether or not the “ETWS notification” is newly received by duplication.

  If the determination unit 22 determines that it has been received twice, it discards the “ETWS notification” in step S104.

  On the other hand, if the determination unit 22 determines that it has not been newly received in duplicate, the “ETWS notification” is transferred to the application function unit 23 in step S105, and the “message ID” and “serial number” are transferred. ”And“ ETWS notification ”.

  In step S <b> 106, when the validity of the received “ETWS notification” can be confirmed, the application function unit 23 performs an output process for the “ETWS notification”.

(Operations and effects of the mobile communication system according to the first embodiment of the present invention)
According to the mobile communication system according to the first embodiment of the present invention, the mobile station UE performs “Duplication Detection” based on the combination of “Message ID”, “Serial Number”, and “ETWS notification”. Since it is possible to detect broadcast information including a fake “ETWS notification” generated and transmitted by a malicious third party, it includes a legitimate “ETWS notification”, “message ID”, and “serial number” When broadcast information is received, regular “ETWS notification” can be output without discarding the broadcast information.

(Mobile communication system according to the second embodiment of the present invention)
A mobile communication system according to the second embodiment of the present invention will be described with reference to FIGS. Hereinafter, the mobile communication system according to the second embodiment of the present invention will be described by focusing on differences from the above-described mobile communication system according to the first embodiment.

  As shown in FIG. 8, the mobile communication system according to the present embodiment is a mobile communication system having UTRAN as a radio access network. Specifically, the mobile communication system according to the present embodiment includes a server CBC that provides CBS, an exchange MSC / SGSN, a radio network controller RNC, and a radio base station NodeB.

  As shown in FIG. 9, the radio network controller RNC includes an ETWS notification information receiving unit 31 and an RRC message transmitting unit 32.

  The ETWS notification information receiving unit 31 is configured to receive emergency information to be notified in ETWS, which is distributed from a server of a predetermined organization such as a local government, from the exchange SGSN.

  The RRC message transmission unit 12 is configured to transmit an RRC (Radio Resource Control) message to the mobile station UE.

  For example, the RRC message transmitting unit 12 is configured to transmit “PAGING TYPE 1 (paging message)”, “SYSTEM INFORMATION CHANGE INDICATION”, “ETWS PRIMATION NOTIFICATION WITH SECURITY”, etc. as the RRC message.

  FIG. 10 shows an example of the format of the “PAGING TYPE 1”.

  “PAGING TYPE 1” is an RRC message transmitted via PCCH (Paging Control Channel), and has “ETWS information” as an information element.

  As shown in FIG. 11, the information element “ETWS information” has “Warning Type”, “Message ID”, and “Serial Number” as information elements.

  “Warning Type” is an information element including the above “ETWS primary notification”, “Message ID” is an information element including the above “message ID”, and “Serial Number” is the above “serial number”. ”.

  FIG. 12 shows an example of the format of such “SYSTEM INFORMATION CHANGE INDICATION”.

  “SYSTEM INFORMATION CHANGE INDICATION” is sent via FACH (Forward Access Channel) or HS-DSCH (High-Speed Downlink) message to notify the change of system information (SI). And has the “ETWS information” described above as an information element.

  FIG. 13 shows an example of the format of the “ETWS PRIMARY NOTIFICATION WITH SECURITY”.

  “ETWS PRIMARY NOTIFICATION WITH SECURITY” is an RRC message transmitted via DCCH (Dedicated Control Channel) or CCCH (Common Control Channel). Information elements include “ETWS information” and “ETW information” or “arW information”. is doing.

  As shown in FIG. 14, the information element “ETWS warning security information” includes the above-described “security information”.

  In the mobile communication system according to the present embodiment, “ETWS secondary notification” is configured to be transmitted by a CB (Cell Broadcast) message including the above-mentioned “message ID” and “serial number”.

The receiving unit 21 of the mobile station UE is configured to receive the RRC message transmitted by the radio network controller RNC via the radio base station NodeB. Also, the receiving unit 21 is configured to receive “PAGING TYPE 1” or “ When a specific RRC message such as "SYSTEM INFORMATION CHANGE INDICATION" or "ETWS PRIMARY NOTIFICATION WITH SECURITY" is received, the determination unit 22 is included in the specific RRC message received by the reception unit 21 in the storage unit 22A. It is configured to determine whether or not the same combination as the combination of “message ID”, “serial number” and “ETWS primary notification” is stored.

  When the receiving unit 21 receives “ETWS PRIMARY NOTIFICATION WITH SECURITY”, the determination unit 22 includes “ETWS PRIMARY NOTIFICATION WITH SECURITY” received by the receiving unit 21 in the storage unit 22A. It may be configured to determine whether or not the same combination as the combination of “message ID”, “serial number”, “ETWS primary notification”, and “security information” is stored.

  The determination unit 22 has a hash value generated based on the “message ID”, “serial number”, and “ETWS primary notification” included in the specific RRC message received by the reception unit 21 in the storage unit 22A. And a combination of “message ID”, “serial number”, and “ETWS primary notification” included in the received predetermined information in the storage unit 22A by determining whether or not the same hash value is stored. It may be configured to determine whether or not the same combination is stored.

  Alternatively, the determination unit 22 stores “message ID”, “serial number”, “ETWS primary notification”, and “security information” included in the “ETWS PRIMARY NOTIFICATION WITH SECURITY” received by the reception unit 21 in the storage unit 22A. By determining whether or not the same hash value as the hash value generated based on the above is stored, the “message ID”, “serial number”, and “ It may be configured to determine whether or not the same combination as the combination of “ETWS primary notification” and “security information” is stored.

  Note that the hash value used by the determination unit 22 for the determination may be generated based on only “ETWS primary notification” or only based on “ETWS notification” and “security information”. In this case, the hash value is used for the determination. For other information (“message ID” and “serial number”), the value itself may be used.

  Hereinafter, the operation of the mobile communication system according to the present embodiment will be described with reference to FIGS. 15 and 16.

  As shown in FIG. 15, the radio network controller RNC in UTRAN transmits “PAGE TYPE 1” and “SYSTEM INFORMATION CHANGE INDICATION” in step S1001, and “ETWS PRIMARY NOTIFICATION WIT” in step S1002. To do.

  When the mobile station UE receives “PAGING TYPE 1” or “SYSTEM INFORMATION CHANGE INDICATION”, the mobile station UE determines whether or not it is necessary to receive “ETWS PRIMARY NOTIFICATION WITH SECURITY”. “ETWS PRIMARY NOTIFICATION WITH SECURITY” is received.

  As shown in FIG. 16, in step S201, when the receiving unit 21 receives a specific RRC message 202 such as "PAGE TYPE 1", "SYSTEM INFORMATION CHANGE INDICATION", or "ETWS PRIMARY NOTIFICATION WITH SECURITY" 202, Whether the determination unit 22 stores the same combination as the combination of “message ID”, “serial number”, and “ETWS primary notification” included in the received specific RRC message in the storage unit 22A. It is determined whether or not the specific RRC message is received in duplicate.

  If the determination unit 22 determines that the data is newly received in duplicate, the determination unit 22 discards the “ETWS primary notification” in step S203.

  On the other hand, if the determination unit 22 determines that it has been newly received, in step S204, the determination unit 22 transfers the “ETWS primary notification” to the application function unit 23, and the “message ID” and “serial number”. And a combination of “ETWS notification”.

  In step S <b> 205, when the validity of the received “ETWS primary notification” can be confirmed, the application function unit 23 performs an output process for the “ETWS primary notification”.

  In the mobile communication system according to the present embodiment, the mobile station UE may be configured to perform the same “Duplication Detection” for the above-described CB message.

  According to the mobile communication system according to the second embodiment of the present invention, the mobile station UE performs “Duplication Detection” based on the combination of “Message ID”, “Serial Number”, and “ETWS primary notification”. Can detect an RRC message including a fake “ETWS primary notification” generated and transmitted by a malicious third party, so that the legitimate “ETWS primary notification”, “message ID”, and “serial number” can be detected. Can be output without discarding the RRC message. When the RRC message including the above is received, the regular “ETWS primary notification” can be output.

  The characteristics of the present embodiment described above may be expressed as follows.

  The first feature of the present embodiment is a mobile communication method for transmitting “ETWS notification (notification information)” to the mobile station UE, which is a “message” for identifying the source and type of “ETWS notification”. Step A for transmitting predetermined information including “ID (identification information)”, “serial number” of “ETWS notification” and “ETWS notification”, and the mobile station UE are included in the received predetermined information in the storage unit 22A. Step B for determining whether or not the same combination as the combination of “message ID”, “serial number” and “ETWS notification” is stored, and the mobile station UE determines that such a combination is stored If you received "ETWS notifica If the mobile station UE determines that the combination is not stored, the received “ETWS notification” is transferred to the application function unit 23, and “message” is stored in the storage unit 22A. The gist is to have a process D for storing a combination of “ID”, “serial number”, and “ETWS notification”.

  In the first feature of the present embodiment, when “security information” is further included in the predetermined information, in step B, the mobile station UE stores “message ID” included in the received predetermined information in the storage unit 22A. ”,“ Serial number ”,“ ETWS notification ”, and“ security information ”may be determined as to whether or not the same combination is stored.

  In the first feature of the present embodiment, in step B, the mobile station UE stores “message ID”, “serial number”, “ETWS notification” and “coding scheme” included in the received predetermined information in the storage unit 22A. It may be determined whether or not the same combination as “” is stored.

  In the first feature of the present embodiment, the mobile station UE stores a hash value generated based on the “message ID”, “serial number”, and “ETWS notification” in the storage unit 22A. In step B, the mobile station UE stores the same hash value as the hash value generated based on the “message ID”, the “serial number”, and the “ETWS notification” included in the received predetermined information in the storage unit 22A. By determining whether or not it is stored, the same combination as the combination of “message ID”, “serial number” and “ETWS notification” included in the received predetermined information is stored in the storage unit 22A. It may be determined whether or not.

  In the first feature of the present embodiment, in step A, broadcast information (SIB10 or SIB11) may be transmitted as the predetermined information.

  In the first feature of the present embodiment, in the process A, an RRC message “ETWS PRIMARY NOTIFICATION WITH SECURITY”, “PAGE TYPE TYPE 1”, or “SYSTEM INFORMATION CHANGE INDICATION” may be transmitted as the predetermined information.

  A second feature of the present embodiment is a mobile station UE that receives “ETWS notification”, and is configured to receive predetermined information including “message ID”, “serial number”, and “ETWS notification”. It is determined whether the same combination as the combination of “message ID”, “serial number”, and “ETWS notification” included in the received predetermined information is stored in the receiving unit 21 and the storage unit 22A If the determination unit 22 determines that the combination is stored, the received “ETWS notification” is discarded, and the determination unit 22 determines that the combination is not stored. If received, the received “ETWS notification” Is transferred to the application function unit 23, and a combination of “message ID”, “serial number”, and “ETWS notification” is stored in the storage unit 22A.

  In the second feature of the present embodiment, when the predetermined information further includes “security information”, the determination unit 22 stores the “message ID” and the “message ID” and “ It may be configured to determine whether the same combination as the combination of “serial number”, “ETWS notification”, and “security information” is stored.

  In the second feature of the present embodiment, the storage unit 22A stores a hash value generated based on “message ID”, “serial number”, and “ETWS notification”, and the determination unit 22 stores It is determined whether or not the same hash value as the hash value generated based on the “message ID”, “serial number”, and “ETWS notification” included in the received predetermined information is stored in the unit 22A. The storage unit 22A is configured to determine whether or not the same combination as the combination of “message ID”, “serial number”, and “ETWS notification” included in the received predetermined information is stored. It may be.

  In the second feature of the present embodiment, the receiving unit 21 may be configured to receive broadcast information (SIB10 or SIB11) as the predetermined information.

  In the second feature of the present embodiment, the receiving unit 21 is configured to receive the RRC message “ETWS PRIMARY NOTIFICATION WITH SECURITY”, “PAGE TYPE TYPE 1”, or “SYSTEM INFORMATION CHANGE INDICATION” as the predetermined information. Also good.

  The operations of the radio base station eNB, the radio network controller RNC, and the mobile station UE described above may be implemented by hardware, a software module executed by a processor, or a combination of both. May be implemented.

  The software module includes a RAM (Random Access Memory), a flash memory, a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electronically Erasable and Programmable ROM, a hard disk, a registerable ROM, a hard disk). Alternatively, it may be provided in a storage medium of an arbitrary format such as a CD-ROM.

  Such a storage medium is connected to the processor so that the processor can read and write information from and to the storage medium. Further, such a storage medium may be integrated in the processor. Such a storage medium and processor may be provided in the ASIC. Such an ASIC may be provided in the radio base station eNB, the radio network controller RNC, and the mobile station UE. Further, the storage medium and the processor may be provided as a discrete component in the radio base station eNB, the radio network controller RNC, and the mobile station UE.

  Although the present invention has been described in detail using the above-described embodiments, it is obvious to those skilled in the art that the present invention is not limited to the embodiments described in this specification. The present invention can be implemented as modified and changed modes without departing from the spirit and scope of the present invention defined by the description of the scope of claims. Therefore, the description of the present specification is for illustrative purposes and does not have any limiting meaning to the present invention.

eNB ... wireless base station 11 ... ETWS notification information receiving unit 12 ... paging message transmitting unit 13 ... broadcast information transmitting unit UE ... mobile station 21 ... receiving unit 22 ... determining unit 22A ... storage unit 23 ... application function unit RNC ... radio channel control Station 31 ... ETWS notification information receiver 32 ... RRC message transmitter

Claims (10)

A mobile communication method for transmitting notification information to a mobile station,
Transmitting the identification information for identifying the source and type of the notification information, the serial number of the notification information and the predetermined information including the notification information; and
Step B for determining whether or not the mobile station stores in the predetermined storage unit the same combination as the combination of the identification information, the serial number, and the notification information included in the received predetermined information;
A step C of discarding the received notification information when the mobile station determines that the same combination is stored;
When it is determined that the mobile station does not store the same combination, the received notification information is transferred to an application function unit inside the mobile station, and the identification information and the predetermined information are stored in the predetermined storage unit. A mobile communication method comprising a step D of storing a combination of a serial number and the notification information.   When the predetermined information further includes security information, in the step B, the mobile station stores the identification information, the serial number, and the notification information included in the received predetermined information in the predetermined storage unit. The mobile communication method according to claim 1, wherein it is determined whether or not the same combination as the combination with the security information is stored. The mobile station stores a hash value generated based on the identification information, the serial number, and the notification information in the predetermined storage unit,
In the step B, the mobile station stores, in the predetermined storage unit, a hash value that is the same as the hash value generated based on the identification information, the serial number, and the notification information included in the received predetermined information. Whether the same combination as the combination of the identification information, the serial number, and the notification information included in the received predetermined information is stored in the predetermined storage unit by determining whether or not it is stored The mobile communication method according to claim 1, wherein the mobile communication method is determined.   The mobile communication method according to claim 1, wherein in the step A, broadcast information is transmitted as the predetermined information.   The mobile communication method according to claim 1, wherein, in the step A, an RRC message is transmitted as the predetermined information. A mobile station that receives notification information,
A receiving unit configured to receive identification information for identifying a source and a type of the notification information, a serial number of the notification information, and predetermined information including the notification information;
A determination unit configured to determine whether or not the same combination as the combination of the identification information, the serial number, and the notification information included in the received predetermined information is stored in a predetermined storage unit; Comprising
When the determination unit determines that the same combination is stored, the received notification information is discarded, and when the determination unit determines that the same combination is not stored, the received notification information is A mobile station configured to transfer to an application function unit inside the mobile station and store the combination of the identification information, the serial number, and the notification information in the predetermined storage unit.   When the predetermined information further includes security information, the determination unit includes, in the predetermined storage unit, the identification information, the serial number, the notification information, and the security information included in the received predetermined information. The mobile station according to claim 6, wherein the mobile station is configured to determine whether or not the same combination as the combination is stored. The predetermined storage unit stores a hash value generated based on the identification information, the serial number, and the notification information,
Whether the determination unit stores in the predetermined storage unit the same hash value as the hash value generated based on the identification information, the serial number, and the notification information included in the received predetermined information It is determined whether or not the same combination as the combination of the identification information, the serial number, and the notification information included in the received predetermined information is stored in the predetermined storage unit. The mobile station according to claim 6, wherein the mobile station is configured as follows.   The mobile station according to claim 6, wherein the reception unit is configured to receive broadcast information as the predetermined information.   The mobile station according to claim 6, wherein the reception unit is configured to receive an RRC message as the predetermined information.

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