JP2009268127A - Method of reporting emergency information, mobile station, and radio base station - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To transmit emergency information to a plurality of mobile stations as quickly as possible, when detecting the occurrence of the emergency information. <P>SOLUTION: A method of reporting emergency information has: a step of allowing the mobile station UE (User Equipment) to receive system information for scheduling information notification for a current change period without waiting for the beginning of the next change period, when detecting a prescribed trigger; a step of allowing the mobile station UE to receive system information for emergency information notification, based on scheduling information reported by the received system information for scheduling information notification; and a step of allowing the mobile station UE to perform processing corresponding to emergency information reported by the received system information for emergency information notification. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to emergency information for transmitting emergency information in a mobile communication system configured such that a radio base station repeatedly transmits a plurality of types of system information to a plurality of mobile stations via a broadcast channel within a change period. The present invention relates to a notification method, a mobile station, and a radio base station.

  Conventionally, “ETWS (Earthquake Tunami Warning System)”, “PWS (Public Warning System)”, and the like are known as systems for transmitting emergency information to a plurality of mobile stations.

  In such “ETWS / PWS”, it is considered that emergency information is transmitted to a plurality of mobile stations using SIB (System Information Block) on a broadcast channel (BCCH).

3GPP TS 23.272 V1.0, March 2008

  However, in the conventional “ETWS / PWS”, since the radio base station is configured to repeatedly transmit a plurality of types of system information (SIB1-8) within a modification period (MP), Even when the occurrence of emergency information is detected, the base station cannot notify the emergency information in the current change period MP (n) until the next change period MP (n + 1) starts. There was a problem that such emergency information could not be transmitted.

  Therefore, the present invention has been made in view of the above-described problems, and an emergency information notification method, a mobile station, and a mobile station that can transmit to a plurality of mobile stations as soon as possible when occurrence of emergency information is detected. An object is to provide a radio base station.

  A first feature of the present invention is a mobile communication system in which a radio base station repeatedly transmits a plurality of types of system information to a plurality of mobile stations via a broadcast channel within a change period. In the emergency information notification method for notifying emergency information, the mobile station detects scheduling information in the current change period without waiting for the start of the next change period when a predetermined trigger is detected. Receiving the system information for emergency information, the process B receiving the emergency information notification system information based on the scheduling information notified by the received scheduling information notification system information, and the mobile station Has a process C for performing processing corresponding to the emergency information notified by the received emergency information notification system information. The gist of the door.

  The second feature of the present invention is that the radio base station is configured to repeatedly transmit a plurality of types of system information to a plurality of mobile stations via a broadcast channel within a change period. In the mobile station configured to receive emergency information, for detecting scheduling information in the current change period without waiting for the start of the next change period when a predetermined trigger is detected The system information receiving unit for scheduling information notification configured to receive system information and the system information for emergency information notification based on the scheduling information notified by the received system information for scheduling information notification The emergency information notification system information receiving unit configured in the above and the received emergency information notification system And summarized in that it includes a processing unit configured to perform processing corresponding to the emergency information notified by Temu information.

  In the second aspect of the present invention, the emergency information notification system information receiving unit may be configured not to receive scheduling information other than the emergency information notification system information.

  In the second aspect of the present invention, when the mobile station is in a standby state or a communication state, the system information receiving unit for notifying scheduling information uses a predetermined indicator included in a paging message as the predetermined trigger. In the present modification period, the system information for scheduling information notification may be received without waiting for the next modification period to start.

  In the second aspect of the present invention, when the mobile station is in a standby state or a communication state, the scheduling information notification system information receiving unit uses a physical downlink control channel including a paging identifier as the predetermined trigger. When the predetermined indicator is detected, the scheduling information notification system information may be received in the current change period without waiting for the next change period to start.

  In the second aspect of the present invention, when the scheduling information notification system information receiving unit receives a predetermined indicator via a physical downlink control channel including a predetermined identifier as the predetermined trigger, the next change period starts. The system information for scheduling information notification may be received in the current change period without waiting for the information to be changed.

  A third feature of the present invention is that the radio base station is configured to repeatedly transmit a plurality of types of system information within a change period to a plurality of mobile stations via a broadcast channel. In the radio base station configured to transmit emergency information, when the occurrence of the emergency information is detected, a predetermined trigger is notified to the plurality of mobile stations, and the next change The system information for scheduling information notification for notifying the scheduling information for specifying the downlink resource for transmitting the system information for emergency information notification is transmitted in the current change period without waiting for the period to start. The configured scheduling information notification system information transmission unit and the downlink resource specified by the scheduling information Used, and summarized in that comprises the emergency information notification system information emergency information notification system information transmitter unit configured to transmit.

  In the third feature of the present invention, the scheduling information notification system information transmitting unit transmits a predetermined indicator in a paging message as the predetermined trigger to the mobile station in a standby state or a communication state. It may be configured.

  In the third aspect of the present invention, for the mobile station in a standby state or a communication state, the scheduling information notification system information transmission unit transmits the predetermined trigger as a physical downlink control channel including a predetermined identifier. The predetermined indicator may be transmitted.

  In the third aspect of the present invention, the scheduling information notification system information transmission unit may be configured to transmit a predetermined indicator as a predetermined trigger via a physical downlink control channel including a predetermined identifier.

  As described above, according to the present invention, there is provided an emergency information notification method, a mobile station, and a radio base station that can transmit to a plurality of mobile stations as soon as possible when occurrence of emergency information is detected. 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. FIG. 3 is a functional block diagram of a mobile station according to the first embodiment of the present invention. It is a figure for demonstrating the information transmitted on BCCH by the wireless base station which concerns on the 1st Embodiment of this invention. It is a figure which shows an example of "ETWS / PWS Indicator" transmitted by the wireless base station which concerns on the 1st Embodiment of this invention. It is a figure which shows an example of "ETWS / PWS Indicator" transmitted by the wireless base station which concerns on the 1st Embodiment of this invention. It is a figure which shows an example of PDCCH containing "ETWS / PWS Indicator" transmitted by the wireless base station which concerns on the 1st Embodiment of this invention. It is a figure which shows an example of PDCCH containing "ETWS / PWS-RNTI" transmitted by the wireless base station which concerns on the 1st Embodiment of this invention. 3 is a flowchart showing an operation of the mobile station according to the first embodiment of the present invention.

(Configuration of mobile communication system according to the first embodiment of the present invention)
The configuration of the mobile communication system according to the first embodiment of the present invention will be described with reference to FIGS.

  As shown in FIG. 1, in the mobile communication system according to the present embodiment, a radio base station eNB sends a plurality of types of system information MIB to a plurality of mobile stations UE within a change period MP via a broadcast channel BCCH. (Master Information Block), SIB1-9 is repeatedly transmitted.

  As illustrated in FIG. 2, the radio base station eNB includes an emergency information reception unit 11 and an emergency information transmission unit 12.

  The emergency information receiver 11 is configured to receive emergency information transmitted from the emergency information notification system, that is, configured to detect occurrence of emergency information.

  The emergency information transmission unit 12 is configured to transmit emergency information to the plurality of mobile stations UE via the broadcast channel BCCH.

  Specifically, the emergency information transmission unit 12 has a plurality of mobile stations UE when emergency information is received by the emergency information reception unit 11, that is, when occurrence of emergency information is detected by the emergency information reception unit 11. For the current change period MP (n), the emergency information notification system information (for example, SIB9) is transmitted in the current change period MP (n) without notifying the predetermined trigger and waiting for the next change period MP (n + 1) to start. The system is configured to transmit scheduling information notification system information (MIB / SIB1) for notifying scheduling information designating a downlink resource for transmission.

  In addition, the emergency information transmission unit 12 is configured to transmit emergency information notification system information (for example, SIB9) using downlink resources specified by the scheduling information.

  As shown in FIG. 3, the mobile station UE includes an emergency information receiving unit 21 and a processing unit 22.

  The emergency information receiving unit 21 is configured to receive emergency information transmitted via the broadcast channel BCCH by the radio base station eNB.

  Specifically, as shown in FIG. 4, the emergency information receiving unit 21, when detecting a predetermined trigger, waits for the start of the next change period MP (n + 1) without waiting for the start of the next change period MP (n + 1). In n), the system is configured to receive scheduling information notification system information (MIB / SIB1).

  The emergency information receiving unit 21 is configured to receive emergency information notification system information (for example, SIB9) based on the scheduling information notified by the received scheduling information notification system information (MIB / SIB1). ing.

  In such a case, the emergency information receiving unit 21 may be configured not to receive scheduling information (SIB2-8) other than the emergency information notification system information (for example, SIB9).

  Here, when the mobile station UE is in a standby state (Idle state) or a communication state, the emergency information receiving unit 21 uses a predetermined indicator (EWTS / PWS Indicator) included in the paging message as a predetermined trigger. When detected, the system information (MIB / SIB1) for scheduling information notification is received in the current change period MP (n) without waiting for the start of the next change period MP (n + 1). It may be.

  As shown in FIG. 5, the paging message is transmitted by a PDSCH (Physical Downlink Shared Channel) corresponding to a PDCCH (Physical Downlink Control Channel) including P-RNTI.

  For example, a predetermined indicator (EWTS / PWS Indicator) is a 1-bit indicator for notifying the presence or absence of emergency information, or Primary Notification (short information for notifying emergency information first, used for ringing at a mobile station, etc. Is).

  That is, the emergency information transmission unit 12 of the radio base station eNB sends, as a predetermined trigger, a predetermined indicator (in the paging message) to the mobile station UE that is in a standby state (Idle state) or a radio link establishment state (RRC_Connected state). (EWTS / PWS Indicator) may be configured to be transmitted.

  When the mobile station UE is in a standby state (Idle state) or a communication state, as shown in FIG. 6, the emergency information receiving unit 21 includes P-RNTI (Paging-RNTI) as a predetermined trigger. When a predetermined indicator (EWTS / PWS Indicator) is detected via the PDCCH (Physical Downlink Control Channel), the current change period MP (n) is not waited for the next change period MP (n + 1) to start. The system information for scheduling information notification (MIB / SIB1) may be received.

  For example, a predetermined indicator (EWTS / PWS Indicator) is a 1-bit indicator for notifying the presence / absence of emergency information, or Primary Notification (short information for notifying emergency information first, used for ringing at a mobile station). Is).

That is, the emergency information transmission unit 12 of the radio base station eNB performs P-RNTI (Paging-RNTI) as a predetermined trigger for the mobile station UE in the standby state (Idle state) and the radio link establishment state (RRC_Connected state). May be configured to transmit a predetermined indicator (EWTS / PWS Indicator) via a PDCCH (Physical Downlink Control Channel).

  When the mobile station UE is in a radio link established state (RRC_Connected state) or in a standby state (Idle state), as shown in FIG. 7, the emergency information receiving unit 21 uses SC-RNTI ( When a predetermined indicator (EWTS / PWS Indicator) is detected via a PDCCH (Physical Downlink Control Channel) including System Change-RNTI (predetermined identifier), without waiting for the next change period MP (n + 1) to start The system information for scheduling information notification (MIB / SIB1) may be received in the current change period MP (n).

  For example, a predetermined indicator (EWTS / PWS Indicator) is a 1-bit indicator for notifying the presence or absence of emergency information, or Primary Notification (short information for notifying emergency information first, used for ringing at a mobile station, etc. Is).

  That is, the emergency information transmission unit 12 of the radio base station eNB performs SC-RNTI (System Change-RNTI) as a predetermined trigger for the mobile station UE in the standby state (Idle state) and the radio link establishment state (RRC_Connected state). The predetermined indicator (EWTS / PWS Indicator) may be transmitted via a PDCCH (Physical Downlink Control Channel) including a predetermined identifier.

  As shown in FIG. 8, when the emergency information receiving unit 21 detects a PDCCH (physical downlink control channel) including ETWS / PWS-RNTI (predetermined identifier) as a predetermined trigger, the next change period MP ( The system may be configured to receive the scheduling information notification system information (MIB / SIB1) in the current change period MP (n) without waiting for n + 1) to start.

  That is, the emergency information transmission unit 12 of the radio base station eNB is configured to transmit predetermined information as a predetermined trigger via a PDCCH (physical downlink control channel) including ETWS / PWS-RNTI (predetermined identifier). Also good.

  The processing unit 22 is configured to perform processing corresponding to the emergency information notified by the received emergency information notification system information (for example, SIB9).

  For example, the processing unit 22 may output an alarm corresponding to the emergency information as a process corresponding to the emergency information, or may display text information or image information corresponding to the emergency information on the display.

(Operation of the mobile communication system according to the first embodiment of the present invention)
With reference to FIG. 9, the operation of the mobile station according to the first embodiment of the present invention will be described.

  As shown in FIG. 9, in step S101, the mobile station UE detects a PDCCH including ETWS / PWS-RNTI or an EWTS / PWS Indicator.

  In step S102, the mobile station UE receives MIB / SIB1 in the current change period MP (n) without waiting for the next change period MP (n + 1) to start.

  In step S103, the SIB 9 is received based on the scheduling information notified by the received MIB / SIB 1, and processing corresponding to the emergency information notified by the SIB 9 (for example, alarm or display display) is performed.

(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, when the mobile station UE detects a predetermined trigger, the mobile station UE does not wait for the next change period MP (n + 1) to start without changing the current change. In the period MP (n), the MIB / SIB1 is received, and the SIB9 for notifying emergency information can be received based on the MIB / SIB1, so that the generated emergency information can be transmitted to a plurality of mobile stations as quickly as possible. The UE can be notified.

(Example of change)
The operations of the mobile station UE and the radio base station eNB described above may be implemented by hardware, may be implemented by a software module executed by a processor, or may be implemented by a combination of both. .

  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 mobile station UE or the radio base station eNB. Further, the storage medium and the processor may be provided as a discrete component in the mobile station UE or the radio base station eNB.

  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 ... radio base station 11, 21 ... emergency information receiving unit 12 ... emergency information transmitting unit UE ... mobile station 22 ... processing unit

Claims (10)

Emergency information for notifying emergency information in a mobile communication system in which a radio base station is configured to repeatedly transmit a plurality of types of system information to a plurality of mobile stations via a broadcast channel within a change period A notification method,
Receiving the scheduling information notification system information in the current change period without waiting for the next change period to start when the mobile station detects a predetermined trigger; and
The mobile station receives emergency information notification system information based on the scheduling information notified by the received scheduling information notification system information; and
An emergency information notification method comprising: a step C in which the mobile station performs processing corresponding to emergency information notified by the received emergency information notification system information. The radio base station receives emergency information in a mobile communication system configured to repeatedly transmit a plurality of types of system information to a plurality of mobile stations via a broadcast channel within a change period. A configured mobile station,
Scheduling information notification system information receiver configured to receive scheduling information notification system information during the current change period without waiting for the next change period to start when a predetermined trigger is detected When,
An emergency information notification system information receiving unit configured to receive emergency information notification system information based on the scheduling information notified by the received scheduling information notification system information;
A mobile station comprising: a processing unit configured to perform processing corresponding to emergency information notified by the received emergency information notification system information.   The mobile station according to claim 2, wherein the emergency information notification system information receiving unit is configured not to receive scheduling information other than the emergency information notification system information.   When the mobile station is in a standby state or a communication state, the scheduling information notification system information receiving unit detects the predetermined indicator included in the paging message as the predetermined trigger, and changes the next The mobile station according to claim 2, wherein the mobile station is configured to receive the scheduling information notification system information in a current change period without waiting for the period to start.   When the mobile station is in a standby state or a communication state, the scheduling information notification system information receiving unit receives, as the predetermined trigger, a predetermined indicator via a physical downlink control channel including a paging identifier. The mobile station according to claim 2, wherein the mobile station is configured to receive the scheduling information notification system information in the current change period without waiting for the start of the next change period.   When the scheduling information notification system information receiving unit receives a predetermined indicator as a predetermined trigger via a physical downlink control channel including a predetermined identifier, the system information receiving unit does not wait for the next change period to start, The mobile station according to claim 2, wherein the mobile station is configured to receive the scheduling information notification system information in a change period. A wireless base station transmits emergency information to a plurality of mobile stations in a mobile communication system configured to repeatedly transmit a plurality of types of system information within a change period via a broadcast channel. A configured radio base station,
When the occurrence of the emergency information is detected, a predetermined trigger is notified to the plurality of mobile stations, and the emergency information notification is performed in the current change period without waiting for the start of the next change period. A system information transmitter for scheduling information notification configured to transmit system information for notification of scheduling information for notifying scheduling information for specifying downlink resources for transmitting system information;
A radio base station, comprising: an emergency information notification system information transmission unit configured to transmit emergency information notification system information using downlink resources specified by the scheduling information.   For the mobile station in a standby state or a communication state, the scheduling information notification system information transmission unit is configured to transmit a predetermined indicator in a paging message as the predetermined trigger. The radio base station according to claim 7.   For the mobile station in a standby state or a communication state, the scheduling information notification system information transmitting unit is configured to transmit a predetermined indicator via a downlink physical channel including a paging identifier as the predetermined trigger. The radio base station according to claim 7, wherein:   The radio according to claim 7, wherein the scheduling information notification system information transmission unit is configured to transmit a predetermined indicator as a predetermined trigger via a physical downlink control channel including a predetermined identifier. base station.

Images