KR102369980B1 - Mobility Management Entity and Method for establishing emergency network using the same - Google Patents

Abstract

The present application relates to a mobility management entity and a method for establishing an emergency communication network using the same. The method for establishing an emergency communication network according to an embodiment of the present invention includes the steps of: receiving a request for subscriber information on a disaster area from a disaster warning system when a disaster occurs; Extracting a TA (Tracking Area) corresponding to the disaster occurrence area, and collecting the International Mobile Subscriber Identity (IMSI) of mobile terminals located in the disaster occurrence area based on the TAI (Tracking Area Identifier) of each mobile terminal step; using the IMSI to request authentication information for network access of each mobile terminal located in the disaster area to a Home Subscriber Server (HSS); and registering the authentication information received from the HSS with a temporary HSS installed in the disaster area.

Description

Mobility Management Entity and Method for establishing emergency network using the same}

The present application relates to a mobility management entity that enables subscribers in a corresponding area to connect to a network temporarily configured to perform communication in a disaster situation such as fire or collapse, and to a method of constructing an emergency communication network using the same.

A general method for terminals to transmit and receive data in a cellular communication environment is through a base station. That is, when there is data to be transmitted to the second terminal, the first terminal transmits the data to the first base station to which it belongs. The first base station transmits the data received from the first terminal to the second base station to which the second terminal belongs through the core network. Finally, the second base station transmits the data received from the first base station to the second terminal. Here, the first base station and the second base station may be the same base station or different base stations.

Public safety communication may be introduced into such a wireless communication system. Disaster safety communications can be used to predict disaster situations, transmit information at disaster sites, and support disaster response.

Disaster safety communication may be performed based on a unicast method, a groupcast method, a broadcast method, and the like. In addition, disaster safety communication includes disaster safety communication in an environment in which a base station exists, disaster safety communication in an environment in which a base station does not exist (eg, when a base station collapses or when a signal from a base station cannot be received), etc. can be classified as

An object of the present application is to provide a mobility management entity capable of establishing an emergency communication network that a requestor can access using an existing frequency and a mobile terminal in case of a disaster, and an emergency communication network establishment method using the same.

An object of the present application is to provide a mobility management entity capable of extracting authentication information of mobile terminals located in a disaster area and providing it to an emergency communication network, and an emergency communication network construction method using the same.

An emergency communication network construction method according to an embodiment of the present invention relates to a method for establishing an emergency communication network of a mobility management entity (MME) in case of a disaster. receiving a request; Extracting a TA (Tracking Area) corresponding to the disaster occurrence area, and collecting the International Mobile Subscriber Identity (IMSI) of mobile terminals located in the disaster occurrence area based on the TAI (Tracking Area Identifier) of each mobile terminal step; using the IMSI to request authentication information for network access of each mobile terminal located in the disaster area to a Home Subscriber Server (HSS); and registering the authentication information received from the HSS in a temporary HSS installed in the disaster area.

Here, the step of receiving the subscriber information request may include receiving, from the disaster warning system, regional information on the disaster-occurring area and IP address (Internet Protocol Address) information of the temporary HSS.

Here, in the requesting of the authentication information, at least one of OP, OPc, and K values of the mobile terminals may be collected and stored, respectively.

Here, in the emergency communication network construction method according to an embodiment of the present invention, when a mobile Evoled Packet Core (EPC) in the disaster occurrence area receives an access request from the mobile terminals, the IMSI of the mobile terminals is stored in a temporary HSS. The method may further include performing authentication by comparing the authentication information with the authentication information, and connecting the mobile terminals for which the authentication is successful to an emergency communication network.

Here, in the step of registering with the temporary HSS, the MME may transmit the authentication information to the IP address of the temporary HSS and store it in the temporary HSS.

According to an embodiment of the present invention, a computer program stored in the medium may exist in combination with hardware to execute the above-described emergency communication network construction method.

Mobility Management Entity (MME) according to an embodiment of the present invention includes: a receiver for receiving a disaster message including local information on a disaster area from a disaster warning system when a disaster occurs; A collection that extracts a tracking area (TA) corresponding to the local information and collects the IMSI (International Mobile Subscriber Identity) of mobile terminals located in the disaster-prone area based on the tracking area identifier (TAI) of each mobile terminal wealth; an authentication information requesting unit for requesting authentication information for network access of each mobile terminal located in the disaster area to a Home Subscriber Server (HSS) using the IMSI; and a registration request unit for registering the authentication information received from the HSS with a temporary HSS installed in the disaster-prone area.

Incidentally, the means for solving the above problems do not enumerate all the features of the present invention. Various features of the present invention and its advantages and effects may be understood in more detail with reference to the following specific embodiments.

According to the mobility management entity and the emergency communication network construction method using the same according to an embodiment of the present invention, in the event of a disaster, a person in need can access the emergency communication network without changing the existing frequency and mobile terminal to make a rescue request. Accordingly, it is possible to shorten the rescue time for the person in need and to improve the rescue rate.

According to the mobility management entity and the emergency communication network construction method using the same according to an embodiment of the present invention, it is possible to extract authentication information of mobile terminals located in the disaster area from the mobility management entity from the HSS and provide it to the emergency communication network. That is, it is possible to obtain authentication information of mobile terminals located in the disaster area without the need for additional equipment in addition to the mobility management entity.

1 is a schematic diagram showing the construction of an emergency communication network in case of a disaster.
2 is a block diagram illustrating a mobility management entity according to an embodiment of the present invention.
3 is a schematic diagram illustrating a request for authentication information of a mobility management entity according to an embodiment of the present invention.
4 is a timing diagram illustrating an operation of a mobility management entity according to an embodiment of the present invention.
5 is a flowchart illustrating a method for establishing an emergency communication network according to an embodiment of the present invention.

Hereinafter, preferred embodiments will be described in detail so that those of ordinary skill in the art can easily practice the present invention with reference to the accompanying drawings. However, in describing the preferred embodiment of the present invention in detail, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, the same reference numerals are used throughout the drawings for parts having similar functions and functions.

In addition, throughout the specification, when a part is 'connected' with another part, it is not only 'directly connected' but also 'indirectly connected' with another element interposed therebetween. include In addition, 'including' a certain component means that other components may be further included, rather than excluding other components, unless otherwise stated. In addition, terms such as "~ unit" and "module" described in the specification mean a unit that processes at least one function or operation, which may be implemented as hardware or software, or a combination of hardware and software.

1 is a schematic diagram showing the construction of an emergency communication network in case of a disaster. Referring to FIG. 1, in a general wireless communication network such as 3G, LTE, 5G, etc., a plurality of mobile terminals 1 may be included within the coverage S of the base station B, and the base station B is a commercial network (not shown). It is connected to and can provide a wireless communication service to the mobile terminals (1) included in the coverage (S).

Here, the mobile terminal 1 is a user terminal, and may be, for example, a wireless device compatible with a legacy mobile communication system, a mobile station (MS), or user equipment (UE). In addition, the base station B may be a BTS (Base Transceiver Station), Node-B, eNodeB Access Point, Wireless Router, etc., and a mobile terminal using multiple access technologies such as CDMA, WCDMA, TDMA, FDMA, SC-FDMA, OFDMA, etc. (1) can be connected wirelessly.

However, in the event of a disaster, the communication network may collapse, and thus the base station B may be disconnected from the commercial network. In this case, a mobile Evolved Packet Core (E) may be introduced into the region, and an emergency communication network may be formed by the mobile EPC (E). Here, the mobile EPC (E) may be mounted on a vehicle or a drone by virtualizing network devices corresponding to the core network.

However, the emergency communication network provided by the mobile EPC (E) is to provide communication between rescue workers at the disaster site, and may not support communication connection to the victims of the disaster. That is, authentication information of a mobile terminal is required to access a network such as an emergency communication network. However, since authentication information about the requesters' mobile terminals is not stored in the emergency communication network, the requesters cannot access the emergency communication network. Accordingly, even when an emergency communication network is built, there is a problem that people who need an actual rescue cannot use the emergency communication network for a rescue request or the like.

In order to solve this problem, the mobility management entity (MME) according to an embodiment of the present invention collects a list of mobile terminals located in the disaster area when receiving a request by the disaster warning system, and HSS It is possible to extract and provide authentication information of each mobile terminal from (Home Subscriber Server). In this case, it is possible for requesters to connect to the emergency communication network and perform communication without changing the frequency or the mobile terminal, as if accessing the existing commercial network. Hereinafter, a mobility management entity according to an embodiment of the present invention will be described.

2 is a block diagram illustrating a mobility management entity according to an embodiment of the present invention.

2, the mobility management entity (MME: Mobility Management Entity, 100) according to an embodiment of the present invention, the receiver 110, the collection unit 120, the authentication information request unit 130 and the registration request unit ( 140) may be included.

Hereinafter, a mobility management entity according to an embodiment of the present invention will be described with reference to FIG. 2 .

The receiver 110 may receive a request for subscriber information on the disaster area from the disaster warning system w in case of a disaster. That is, when a disaster occurs, the disaster warning system w may notify the MME 100 of the occurrence of a disaster, and may request information about subscribers located in the corresponding disaster area to create an emergency communication network. In this case, the disaster warning system w may transmit local information on the disaster occurrence area and IP address (Internet Protocol Address) information of the temporary HSS 200 to store subscriber information together.

The collection unit 120 may extract a tracking area (TA) corresponding to the disaster-occurring area, and based on the tracking area identifier (TAI) of each mobile terminal, IMSI (Internal Mobile) of mobile terminals located in the disaster-prone area Subscriber Identity) can be collected.

Since the MME 100 may store TAs indicating the area covered by each base station B, the collection unit 120 collects each TA corresponding to the disaster occurrence area received from the disaster warning system w. can be extracted. In addition, in the MME 100, the IMSI registered by the mobile terminals 1 when initially accessing the network and the TAI list for each mobile terminal 1 for tracking the location of each mobile terminal 1 thereafter may be stored. . Accordingly, the collection unit 120 compares the TAI list of each mobile terminal 1 with the TA corresponding to the disaster-prone area to specify mobile terminals located in the disaster-prone area, and to collect their IMSI. there is.

The authentication information requesting unit 130 may request authentication information of each of the mobile terminals 1 located in the disaster area from the HSS 10 using the IMSI. That is, as shown in FIG. 3 , TA-based IMSIs (IMSIs) of the mobile terminal 1 located in the disaster area can be provided to the HSS 10 connected to the existing commercial network, and from the HSS 10 , each authentication information corresponding to the IMSI of The HSS 10 may be a server center connected to a commercial network, and may store subscriber-related information such as authentication information of each subscriber and a subscriber profile. Here, the authentication information may include authentication key values such as OP, OPc, and K values, and the subscriber profile includes QoS (Quality of Service) rating information such as priority and maximum bandwidth suitable for the service product subscribed to by the subscriber. may be included.

In general, when the mobile terminal 1 accesses the commercial network, the MME 100 may receive authentication information and a subscriber profile from the HSS 10 for authentication and QoS settings for the mobile terminal 1 . there is. Accordingly, the authentication information requesting unit 130 may request the HSS 10 to provide authentication information for each mobile terminal 1 specified by the IMSI using the same protocol.

The registration request unit 140 may register the authentication information received from the HSS 10 in the temporary HSS 200 installed in the disaster-prone area. That is, the temporary HSS 200 can be installed so that the mobile terminals 1 of the requestors can be accessed in the emergency communication network formed in the disaster occurrence area, and the temporary HSS 200 corresponds to the mobile terminals 1 of each requester in the temporary HSS 200. You can store authentication information.

Specifically, the registration request unit 140 transmits authentication information to the IP address of the temporary HSS 200 received from the disaster warning system w, so that the temporary HSS 200 stores each authentication information. .

Thereafter, the virtualized MME (not shown) located in the mobile EPC (E) may receive a connection request from the mobile terminals 1 of the requestors, and store the IMSI of the mobile terminals 1 in the temporary HSS 200. Authentication can be performed by comparing with authentication information. Thereafter, the mobile terminals 1, which have been successfully authenticated, may be connected to the emergency communication network to perform necessary communication.

4 is a timing diagram illustrating an operation of a mobility management entity according to an embodiment of the present invention. Referring to FIG. 4 , when a disaster occurs, the disaster warning system w may request subscriber information from the MME 100 ( S1 ). In this case, the MME 100 may search for mobile terminals located in the disaster area. That is, by comparing the TAI of each mobile terminal registered in the MME 100 with the TA of the disaster-prone area, mobile terminals located in the disaster-prone area can be extracted, and at this time, each movement using the IMSI of the mobile terminals terminals can be distinguished.

Thereafter, the MME 100 may provide the IMSI of each mobile terminal located in the disaster-prone area to the HSS 10 connected to the commercial network to request authentication information of the mobile terminals (S3). That is, each mobile terminal may request authentication information necessary for accessing the emergency communication network, etc. from the HSS 10 .

The HSS 10 may provide authentication information such as OP, OPc, and K values in response to the request of the MME 100 (S4). The MME 100 may register the received authentication information by storing it in the temporary HSS 200 installed in a disaster-prone area (S5). When the registration of authentication information is completed, the temporary HSS 200 may notify the MME 100 of registration completion (S6), and the MME 100 registers subscriber information in the disaster warning system w to the temporary HSS 200. It can be informed that it has been done (S7). Thereafter, by connecting the temporary HSS 200 to the emergency communication network, it is possible to establish an emergency communication network in the disaster area.

5 is a flowchart illustrating a method of establishing an emergency communication network of a mobility management entity in case of a disaster according to an embodiment of the present invention.

Referring to FIG. 5 , when a disaster occurs, the MME may receive a request for subscriber information on the disaster area from the disaster warning system (S10). That is, when a disaster occurs, the disaster warning system can notify the MME of the occurrence of a disaster, and can request information about subscribers located in the disaster area to create an emergency communication network. In this case, the disaster warning system may transmit local information on the disaster area and IP address information of a temporary HSS to store subscriber information together.

Thereafter, the MME may extract a TA corresponding to the disaster occurrence area and collect the IMSI of mobile terminals located in the disaster occurrence area based on the TAI of each mobile terminal (S20). Since TAs indicating areas covered by each base station may be stored in the MME, each TA corresponding to the disaster occurrence area received from the disaster warning system may be extracted. In addition, the MME may store an IMSI registered by mobile terminals upon initial network connection, and a list of TAIs for each mobile terminal for tracking the location of each mobile terminal thereafter. Accordingly, the MME can compare the TAI list of each mobile terminal with the TA corresponding to the disaster-occurring area to specify mobile terminals located in the disaster-prone area, and collect IMSIs of the specified mobile terminals.

When the collection of the IMSI is completed, the MME may request authentication information of each mobile terminal located in the disaster area from the HSS using the IMSI (S30). That is, IMSIs of mobile terminals located in the disaster area can be provided to the HSS connected to the existing commercial network, and authentication information corresponding to each IMSI can be provided from the HSS. Here, the authentication information may include authentication key values such as OP, OPc, and K values. In this case, the MME may use the same protocol used when requesting authentication information from the existing HSS.

Upon receiving the authentication information from the HSS, the MME may register the authentication information received from the HSS in the temporary HSS installed in the disaster area (S40). That is, a temporary HSS may be installed so that the mobile terminals of the requestors can access it in the emergency communication network formed in the disaster occurrence area, and authentication information corresponding to the mobile terminals 1 of the requesters may be stored in the temporary HSS. Through this, requesters can access the emergency communication network in the same way as the existing network without changing the frequency or the mobile terminal. According to an embodiment, the MME transmits authentication information to the IP address of the temporary HSS received from the disaster warning system, and it is also possible to store each authentication information in the temporary HSS.

Additionally, the virtualized MME located in the mobile EPC may receive access requests from the requestors' mobile terminals, and in this case, compare the IMSI of the mobile terminals with authentication information stored in the temporary HSS to perform authentication. After the successful authentication, the mobile terminals can connect to the emergency communication network to perform necessary communication, such as a rescue request (S50).

The present invention described above can be implemented as computer-readable codes on a medium in which a program is recorded. The computer-readable medium may continuously store a computer-executable program, or may be temporarily stored for execution or download. In addition, the medium may be various recording means or storage means in the form of a single or several hardware combined, it is not limited to a medium directly connected to any computer system, and may exist distributedly on a network. Examples of the medium include a hard disk, a magnetic medium such as a floppy disk and a magnetic tape, an optical recording medium such as CD-ROM and DVD, a magneto-optical medium such as a floppy disk, and those configured to store program instructions, including ROM, RAM, flash memory, and the like. In addition, examples of other media may include recording media or storage media managed by an app store for distributing applications, sites supplying or distributing other various software, and servers. Accordingly, the above detailed description should not be construed as restrictive in all respects but as exemplary. The scope of the present invention should be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the present invention are included in the scope of the present invention.

The present invention is not limited by the above embodiments and the accompanying drawings. For those of ordinary skill in the art to which the present invention pertains, it will be apparent that the components according to the present invention can be substituted, modified and changed without departing from the technical spirit of the present invention.

1: mobile terminal 10: HSS
100: MME 110: receiver
120: collection unit 130: authentication information request unit
140: registration request unit 200: temporary HSS

Claims (7)

In the emergency communication network construction method of a mobility management entity (MME) in case of a disaster,
When a disaster occurs, receiving a request for subscriber information about the disaster area from the disaster warning system;
Extracting a TA (Tracking Area) corresponding to the disaster occurrence area, and collecting the International Mobile Subscriber Identity (IMSI) of mobile terminals located in the disaster occurrence area based on the TAI (Tracking Area Identifier) of each mobile terminal step;
using the IMSI, requesting authentication information for network access of each mobile terminal located in the disaster occurrence area to a Home Subscriber Server (HSS); and
and registering the authentication information received from the HSS in a temporary HSS installed in the disaster area.
The method of claim 1, wherein the receiving of the subscriber information comprises:
The emergency communication network construction method, characterized in that receiving, from the disaster warning system, local information on the disaster area and IP address (Internet Protocol Address) information of the temporary HSS.
According to claim 1, wherein the step of requesting the authentication information
An emergency communication network construction method, characterized in that collecting and storing at least one of OP, OPc, and K values of the mobile terminals.
The method of claim 1,
When a mobile Evoled Packet Core (EPC) within the disaster area receives an access request from the mobile terminals, the mobile terminal performs authentication by comparing the IMSI of the mobile terminals with authentication information stored in a temporary HSS, and the mobile terminal in which the authentication succeeds The method for constructing an emergency communication network, characterized in that the terminal further comprises the step of accessing the emergency communication network.
The method of claim 2, wherein the step of registering with the temporary HSS comprises:
The MME transmits the authentication information to the IP address of the temporary HSS, and stores the authentication information in the temporary HSS.
A computer program stored in a medium for executing the emergency communication network construction method of any one of claims 1 to 5 in combination with hardware.
When a disaster occurs, a receiver for receiving a disaster message including local information on the disaster area from the disaster warning system;
A collection that extracts a tracking area (TA) corresponding to the local information and collects the IMSI (International Mobile Subscriber Identity) of mobile terminals located in the disaster-prone area based on the tracking area identifier (TAI) of each mobile terminal wealth;
an authentication information requesting unit that uses the IMSI to request authentication information for network access of each mobile terminal located in the disaster-prone area to a Home Subscriber Server (HSS); and
Mobility management entity including a registration request unit for registering the authentication information received from the HSS, the temporary HSS installed in the disaster area.

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