METHOD AND DEVICE FOR RECEIVING EMERGENCY EVENT ALERT

• US 20100019899A1
• Filed: 07/14/2009
• Published: 01/28/2010
• Est. Priority Date: 07/28/2008
• Status: Active Grant

• Current Assignee: FlashPoint Technology, Inc.
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Zhang, Zhongbao, Zhang, Ni, Qi, Baojian, Zhang, Dewen, Shi, Youzhu, Mao, Lingzhi
• Granted Patent: US 8,184,002 B2
• Time in Patent Office: Days
• US Class Current: 340/540
• CPC Class Codes: G08B 27/005 with transmission via computer network
• CPC Class Codes: G08B 27/008 with transmission via TV or radio broadcast
• CPC Class Codes: H04H 20/59 for emergency or urgency
• CPC Class Codes: H04H 60/82 the transmission system being the Internet
• CPC Class Codes: H04N 21/23614 Multiplexing of additional data and video streams arrangements for simultaneous broadcast of plural pieces of information H04H20/28
• CPC Class Codes: H04N 21/4348 Demultiplexing of additional data and video streams
• CPC Class Codes: H04N 21/6371 directed to network
• CPC Class Codes: H04N 21/6405 Multicasting data broadcast and multicast in packet switching networks H04L12/18
• CPC Class Codes: H04N 21/64322 IP

Abstract

A method, a device, and a system for receiving an emergency event alert are provided, which relate to a field of communication applications. As long as communication between a user terminal and a bearer network is normal, no matter whether the user terminal is watching live television programs, the user terminal can receive the emergency event alert in time. The method is as follows. A receiving unit discovers an emergency event alert service. The receiving unit is attached to the emergency event alert service. The receiving unit receives an emergency event alert message sent by a distributing unit. An emergency event alert receiving unit device includes a discovering and processing module, a service attachment processing module, and a message reception processing module. Through attachment to the emergency event alert service, the user terminal can receive the emergency event alert in time.

Claims

1. A method for receiving an emergency event alert, comprising:

discovering, by a receiving unit, an emergency event alert service;

attaching, by the receiving unit, to the emergency event alert service; and

receiving, by the receiving unit, an emergency event alert message sent by a distributing unit.

2. The method according to claim 1, wherein a manner of the receiving unit discovering the emergency event alert service comprises:

presetting information related to the distributing unit in the receiving unit;

or

performing message exchange between the receiving unit and a service discovering unit to obtain information related to the distributing unit;

wherein the information related to the distributing unit comprises multicast address information for the distributing unit to send the emergency event alert, or indirect database server address information of the distributing unit.

3. The method according to claim 2, wherein a manner of performing message exchange between the receiving unit and the service discovering unit to obtain the information related to the distributing unit comprises any one of the following:

sending, by the receiving unit, a network attachment request to a network in a broadcast manner; and

receiving, by an entity processing the network attachment request in the network, the network attachment request, and sending a network attachment response message containing the information related to the distributing unit to the receiving unit;

wherein the service discovering unit is located in the entity processing the network attachment request in the network;

sending, by the receiving unit, an emergency event alert service discovering request to the network in a broadcast manner after completing network attachment; and

receiving, by the service discovering unit, the service discovering request, and sending an emergency event alert service discovering response message containing the information related to the distributing unit to the receiving unit;

sending, by the service discovering unit, the information related to the distributing unit to the receiving unit actively after perceiving that the receiving unit completes network attachment;

sending, by the receiving unit, an IP multimedia subsystem (IMS) registration request to a call session control function (CSCF); and

receiving, by an entity processing the IMS registration request in an IMS network, the IMS registration request, and sending an IMS registration response message containing the information related to the distributing unit to the receiving unit;

wherein the service discovering unit is located in the CSCF;

sending, by the receiving unit, an emergency event alert service discovering request to a CSCF after completing IMS registration;

triggering, by the CSCF, the request to the service discovering unit;

processing, by the service discovering unit, the service discovering request; and

sending, by the service discovering unit, an emergency event alert service discovering response message containing the information related to the distributing unit in to the CSCF; and

sending the emergency event alert service discovering response message to the receiving unit through the CSCF; and

sending, by the receiving unit, an IMS registration request to a CSCF;

sending, by the CSCF, a third-party IMS registration request to an emergency alert system application server (EAS AS) after processing the IMS registration request; and

sending, by the EAS AS, the information related to the distributing unit to the receiving unit actively after processing the third-party IMS registration request;

wherein the CSCF and the EAS AS are service discovering units.

4. The method according to claim 1, wherein a manner of the receiving unit attaching to the emergency event alert service comprises any one of the following:

if multicast address information for the distributing unit to send the emergency event alert is obtained by the receiving unit, sending, by the receiving unit, to the distributing unit a request message for joining a corresponding multicast group, and joining the corresponding multicast group to complete attachment of the emergency event alert service; and

if indirect database server address information of the distributing unit is obtained by the receiving unit, sending, by the receiving unit, a query message to the server to obtain a multicast address for the distributing unit to send the emergency event alert message, sending a request message for joining the corresponding multicast group to the distributing unit, and joining the corresponding multicast group to complete attachment of the emergency event alert service.

5. The method according to claim 1, wherein the emergency event alert message sent by the distributing unit and received by the receiving unit contains an emergency event alert indication, and the method further comprises:

processing and presenting, by the receiving unit, the emergency event alert according to the emergency event alert indication in the emergency event alert message.

6. The method according to claim 5, wherein the emergency event alert indication comprises types of the emergency event alert, an emergency indication, and a parameter of an interface for transmitting an emergency event alert media stream;

and the parameter of the interface for transmitting the emergency event alert media stream is any one of the following;

multicast address information, broadcast address information, file transfer protocol/hypertext transfer protocol (FTP/HTTP) application layer address information and Internet protocol television (IPTV) channel identity information.

7. The method according to claim 6, wherein before the processing and presenting, by the receiving unit, the emergency event alert according to the emergency event alert indication in the emergency event alert message, the method further comprises any one of the following:

requesting, by the distributing unit, a bearer layer to reserve a bearer resource and indicating a priority of the resource during distribution of the emergency event alert according to the emergency event alert indication;

when the distributing unit receives a request for content of the emergency event alert media stream sent by the receiving unit, requesting, by the distributing unit, a bearer layer to reserve a bearer resource, and indicating a priority of the resource by identifying the request for content of the emergency event alert media stream as the emergency event alert indication;

requesting, by the receiving unit, a policy enforcement entity of a bearer layer to reserve a bearer resource and indicating a priority of the resource according to the emergency event alert indication after receiving the emergency event alert message;

initiating, by the receiving unit, an emergency event alert session establishment request according to the emergency event alert indication after receiving the emergency event alert message, and requesting, by the distributing unit, a policy enforcement entity of a bearer layer through establishment of the emergency event alert session to reserve the bearer resource and indicate a priority of the resource; and

presetting bandwidth requirements and a priority of the emergency event alert media stream in the policy enforcement entity or a policy decision entity of a bearer layer, and instructing the bearer layer to execute a preset bandwidth policy automatically after detecting the emergency event alert media stream.

8. The method according to claim 7, wherein if the parameter of the interface for transmitting the emergency event alert media stream is the multicast address information, processing and presenting, by the receiving unit, the emergency event alert according to the emergency event alert indication in the emergency event alert message comprises:

obtaining, by the receiving unit, the multicast address information;

sending, by the receiving unit, the request message for joining the multicast group corresponding to the multicast address information, wherein the request message contains the multicast address information, or contains the emergency indication at the same time; and

joining, by the receiving unit, the multicast group, and receiving the emergency event alert media stream, and playing the media stream.

9. The method according to claim 6, wherein the parameter of the interface for transmitting the emergency event alert media stream is IPTV channel identity information, the method further comprises:

obtaining an IPTV channel identity of an emergency event alert from the emergency event alert message, wherein the IPTV channel identity is a specific channel identity dedicated to sending an emergency event alert media stream or a common channel identity;

initiating an emergency event alert session establishment request, wherein the establishment request contains the IPTV channel identity, or contains an emergency indication at the same time;

processing, by an emergency-call session control function (E-CSCF), the emergency event alert session establishment request, requesting a resource and admission control subsystem (RACS) to reserve a bearer resource, and containing a priority of the bearer resource to be reserved according to the identified IPTV channel identity or the emergency indication; and

after the emergency event alert session is established, joining the emergency event alert IPTV channel.

10. The method according to claim 9, further comprising:

forwarding, by the E-CSCF, the emergency event alert session establishment request to an EAS AS;

receiving and forwarding, by the E-CSCF, a response message returned by the EAS AS, wherein the response message contains a multicast address of the emergency event alert IPTV channel; and

receiving a response message of the emergency event alert session establishment request, joining a multicast group corresponding to the multicast address carried in the response message, receiving the emergency event alert media stream sent by the IPTV channel, and playing the media stream.

11. An emergency event alert receiving unit device, comprising:

a discovering and processing module, configured to discover an emergency event alert service;

a service attachment processing module, configured to attach to the emergency event alert service after the emergency event alert service discovering is completed; and

a message reception processing module, configured to receive an emergency event alert message and obtain an emergency event alert indication from the emergency event alert message.

12. The emergency event alert receiving unit device according to claim 11, further comprising:

a media stream reception processing module, configured to receive an emergency event alert media stream and switch to present the emergency event alert media stream according to the obtained emergency event alert indication.

13. The emergency event alert receiving unit device according to claim 12, further comprising one of or a combination of the following:

a bearer resource reserving request module, configured to request a bearer layer to reserve a bearer resource according to the emergency event alert indication, wherein the request contains a priority of the bearer resource to be reserved; and

an emergency session establishment request module, configured to initiate an emergency event alert session establishment request, wherein the establishment request contains an Internet protocol television (IPTV) channel identity of the emergency event alert indication, or contains an emergency indication at the same time.

14. An emergency-call session control function (E-CSCF) device, comprising:

an emergency channel joining identification module, configured to identify that an emergency event alert session establishment request is an emergency channel joining request message by identifying that an Internet protocol television (IPTV) channel identity carried in the emergency event alert session establishment request is an emergency channel identity, or by identifying an emergency indication message carried in the session establishment request; and

an emergency channel joining processing module, configured to request a policy enforcement entity of a bearer layer to reserve a bearer resource after the emergency channel joining request message is identified, and contain a priority of the bearer resource to be reserved according to the identified IPTV channel identity or the emergency indication.

15. The E-CSCF device according to claim 14, wherein

the emergency channel joining processing module is further configured to forward the emergency event alert session establishment request to an emergency alert system application server (EAS AS) after the emergency channel joining request message is identified, and receive and forward a response message returned by the EAS AS, wherein the response message contains a multicast address joined by the emergency channel.