39 results about "Tsunami warning system" patented technology

The invention provides a system information transmitting method, a receiving method, a transmitting device and a receiving device. The system information transmitting method comprises steps: the system information for being transmitted to a terminal is determined; and the above system information is transmitted in one or more predetermined narrowband positions. Thus, the transmitting mode problem of downlink control information independently carrying system message change information, ETWS (Earthquake and Tsunami Warning System), CMAS (Commercial Mobile Alert Service) and the like in a related technology can be solved, and effects of efficient transmission are achieved; and the problem of high complexity when the terminal blindly detects the downlink control information carrying the system message in the related technology can be solved, and the effects of reducing the complexity when the terminal blindly detects the system message are further achieved.

The invention discloses a method for sending a main notification message of an earthquake tsunami warning system ETWS, which comprises that: a base station sends a paging message to a terminal in a current system message modifying cycle after receiving the main notification message of the ETWS, wherein the paging message carries a basic information part of the main notification message of the ETWS; and the base station broadcasts the system message containing a safety information part of the main notification message of the ETWS in a next system message modifying cycle. The invention also discloses a method for receiving the main notification message of the ETWS, which comprises that: the terminal receives the paging message, reads the basic information part of the main notification message of the ETWS carried by the paging message; and the base station receives and reads the system message carrying the safety information part of the main notification message of the ETWS in the next system message modifying cycle, and verifies whether the basic information is true or not. The invention meets a delay requirement on the main notification message of the ETWS reaching the terminal within 4 seconds by only modifying the base station and the terminal slightly.

The invention discloses a method and a system for transmitting major notification messages of an earthquake and tsunami warning system. After paging a terminal through a paging message comprising ETWSmessage indicated information, a base station takes the major notification messages of the ETWS as user data of the ETWS to schedule and allocate the major notification messages, generates control information with a user identifier of the ETWS to send the control information on a PDCCH, and sends the major notification messages of the ETWS on a DL-SCH according to the control information; and theterminal monitors the PDCCH channel after receiving the paging message, receives and analyzes the control information after detecting the control information with the user identifier of the ETWS to acquire resource information in the control information, and receives the major notification messages of the ETWS on corresponding resources of the DL-SCH. Basic information of the major notification messages of the ETWS also can be carried in the paging message and sent, and security information is only sent on the DL-SCH. The invention also discloses a corresponding transmission system. The method and the system can meet the requirement of the major notification messages of the ETWS on sending time.

The invention discloses a method for transmitting and receiving indication information of earthquake and tsunami warning system message, applicable to a connection status terminal which is enabled toreceive the ETWS message in time. The transmission method comprises the step that a base station transmits the indication information of the ETWS message to the connection status terminal through a special signaling on a special channel when an earthquake and tsunami early warning system message is to be issued, wherein the indication message is used for indicating whether an ETWS message is to beissued exists or not. The reception method comprises the steps as follows: a terminal in the connection status receives the special signaling from the special channel to obtain the indication information of the earthquake and tsunami warning system ETWS message, and the terminal receives the ETWS message immediately according to the indication information.

A system and method for sending Commercial Mobile Alert System (CMAS) and Earthquake and Tsunami Warning System (ETWS) alert messages to recipients who are not located within the designated alert area. Recipients specify filter criteria to define geographic areas of interest and the types of alerts of interest by matching Extensible Markup Language (XML) tags and data contained in the alert message. Alert messages may be sent to the recipient via SMS, e-mail, phone or push notification service.

If an LTE base station (10-1) transmits an Earthquake and Tsunami Warning System (ETWS) signal from a core network (30) to mobile terminals (40), the LTE base station (10-1) determines that conditions are satisfied in which the traffic volume between the mobile terminals (40) is predicted to be at least a first predetermined value, adjusts the real amount of available wireless resources, and obtains an amount of available wireless resources after said adjustment. Additionally, the LTE base station (10-1) transmits a resource status response message, including the amount of available wireless resources after adjustment, to an adjacent LTE base station (10-2).

The invention relates to an ETWS (earthquake and tsunami warning system) and a method for processing an ETWS alarm message. The ETWS comprises a server and a base station. The method comprises the steps of: broadcasting a paging message including an etws-Indication field within the preset time when the ETWS alarm message is received by the base station; and receiving SIB10 including an ETWS important notice and/or SIB11 including an ETWS auxiliary notice in a system massage of the base station according to a schedulingInfoList field of SIB1 in the system massage of the base station after the paging message including the etws-Indication field is received by UE (user equipment). Bandwidth resources of the base station can be saved, and the power consumption of the UE can be reduced.

The present invention relates to an earthquake and tsunami warning system (ETWS) technology, and in particular to a system, apparatus and methods for broadcasting and transmitting an ETWS message. The system for broadcasting and transmitting an ETWS message includes: an ETWS message publishing entity, adapted to publish an ETWS message; a cell broadcast center (CBC), adapted to: encapsulate the ETWS message published by the ETWS message publication entity into a cell broadcast service (CBS) message, and send the CBS message; a mobility management entity (MME), adapted to forward the CBS message sent by the CBC to a radio access network (RAN); and the RAN, adapted to: receive the CBS message forwarded by the MME, and send the received CBS message to a user equipment (UE). The preceding system provides a new technical solution for transmitting an ETWS message, which can guarantee the security of the ETWS message transmission by using the security mechanism of the CBS.

The invention relates to an earthquake and tsunami warning system and a method for transmitting primary notification. A base station pages all terminals through paging messages comprising the indicating information of an earthquake and tsunami warning system ETWS messages, and sends the safety information of ETWS primary notification on a resource preappointed with the terminals; the basic information of the ETWS primary notification is carried in the paging messages and sent, or is sent on the preappointed resource; and after the terminals receive the paging messages comprising the indicatinginformation of the ETWS messages, the safety information of the ETWS primary notification is received on the preappointed resource, and the basic information of the ETWS primary notification is acquired in the paging messages, or is received on the preappointed resource. The earthquake and tsunami warning system can meet the requirement of the primary notification of the earthquake and tsunami warning system on the transmission time.

The embodiment of the invention provides an information transmission method, a base station and user equipment (UE). The method comprises the following steps of: after an earthquake and tsunami warning system (ETWS) finishes message broadcast, generating a paging message; and broadcasting the paging message, wherein the paging message is used for instructing the UE which is in a state of monitoring an ETWS message to receive a system message block, and the system message block does not carry the scheduling mapping information of an ETWS primary notification message (PN) and an ETWS secondary notification message (SN). According to the embodiment of the invention, the UE receives the paging message which is broadcasted by the base station, and actively receives the system message block which does not carry the scheduling mapping information of the ETWS PN and the ETWS SN, so that the UE can stop monitoring the ETWS message, and power consumption of the UE is effectively reduced.

The embodiment of the invention discloses a method for acquiring an ETWS message, which comprises the following steps that: a UE acquires change indication information of an earthquake and tsunami warning system (ETWS); and when the change indication information of the ETWS indicates an added or updated ETWS message, the UE acquires the ETWS message. The embodiment of the invention also disclosesa method for sending the ETWS message. In the embodiment, due to the transfer of the change indication information of the ETWS, the UE can acquire the state change of the ETWS message timely by only reading the added or updated ETWS message instead of an invalid ETWS message or other system messages so as to effectively reduce the power consumption of the UE. The embodiment of the invention also discloses the user equipment and a system.

The invention discloses a method for indicating a primary notification message of an earthquake and tsunami warning system, which comprises that: after receiving the primary notification message of the earthquake and tsunami warning system ETWS, a base station sends an ETWS indicating information sequence appointed with a terminal on a synchronous channel SCH; the ETWS indicating information sequence is used for indicating the existing ETWS message; and after judging that the received sequence is the ETWS indicating information sequence, the terminal receives the primary notification message of the ETWS on the appointed resource. Through the technical scheme provided by the invention, under the condition of modifying the base station and the UE a little, the method can realize the indication for the primary notification message of the ETWS. Through the information indication of the quick synchronous channel SCH, the time delay can be reduced.

The invention discloses a system message receiving and transmitting method of an earthquake and tsunami warning system (ETWS). The system message receiving method comprises the following steps: aftera terminal successfully receives a paging message of an ETWS system message for the first time, reading the ETWS system message according to the scheduling information of the ETWS system message in asystem message block 1; within consecutive periods of time after the reading, when the terminal receives the paging message of the ETWS system message, not reading the ETWS system message, wherein theduration of the consecutive periods of time is not shorter than the duration from receiving the paging message of the ETWS system message to reading the ETWS system message. The invention can solve the problem that the ETWS system message cannot be received by the terminal because the terminal processes multiple same paging.

A cellular station coupled to a Mobility Management Entity (MME) is provided. The cellular station includes a wireless transceiver and a controller. The wireless transceiver performs wireless transmission and reception to and from a plurality of wireless communication devices. The controller receives a warning message delivery request for an Earthquake and Tsunami Warning System (ETWS) from the MME, starts broadcasting a public warning message to the wireless communication devices via the wireless transceiver and sends a warning message delivery response to the MME in response to the warning message delivery request, and sends a warning status report comprising status information of one or more of the wireless communication devices to the MME.

The embodiment of the invention provides message sending and receiving methods, equipment and systems. The message sending method comprises the following steps: a mobility management entity (MME) receives an earthquake and tsunami warning system (ETWS) message; when the received ETWS message is different from an ETWS message stored in the MME, the MME sets an information change identifier; and the MME sends the received ETWS message and the information change identifier. In the embodiment of the invention, sending of the ETWS message to an eNB (evolved Node B) is decided by using the MME, so that the eNB is only required to transmit the received message to UE (User Equipment) without judging the contents of the ETWS message, the signaling flow complexity of the transmission of the ETWS message with the eNB is lowered, and the load of access network equipment is lightened.

The invention discloses a tsunami pre-warning system and a method. The tsunami pre-warning system comprises pile foundations arranged in a sea area, tsunami signal sensing units arranged on the pile foundations, and a tsunami signal receiving unit arranged on the coastline. The tsunami signal sensing units and the tsunami signal receiving unit are connected by means of wireless communication. Each tsunami signal sensing unit is internally provided with a liquid level sensor, a pressure sensor, and a satellite radio-frequency transmitter. The tsunami signal receiving unit comprises a signal receiver and a civil air defense alarm system. The system detects tsunami through sensing devices including the liquid level sensors, the pressure sensors and the satellite radio-frequency transmitters, and communicates with a tsunami alarm system by means of wireless communication to achieve the purpose of tsunami pre-warning. The system has the advantages of simple structure, convenient operation, good flexibility, and high reliability. The invention fills in the technological gap in tsunami pre-warning technology in the prior art.

The embodiment of the invention discloses a method and a system for effectively correcting propagation delay of an ocean-crossing tsunami, creatively considers a second-order physical effect ignored by a shallow water equation, deduces a novel wave dispersion relationship based on a new physical framework, and improves the propagation delay of the ocean-crossing tsunami. Finally, the influence of wave dispersion, earth elasticity, seawater density stratification and other effects on the tsunami phase velocity is simulated through a depth correction method, so that the arrival time error of the oversea tsunami is reduced. Compared with a classic shallow water equation, the method has the advantages that delay errors of the ocean crossing tsunami are effectively corrected, and the tsunami propagation arrival time errors can be increased by 60-80%. Compared with other methods, the calculation efficiency can be improved by dozens of times or more on the premise that the calculation precision of the result obtained through the method is equivalent. Therefore, the method is particularly suitable for upgrading the tsunami early warning system.