KR20180062728A - Method and apparatus for transmitting group messages based on nb-iot - Google Patents

Abstract

The present invention relates to a method for transmitting a group message based on NB-IoT, and an apparatus therefor. The method of the present invention comprises: a first step of requesting, by an application server (AS), a service capability server (SCS) to transmit unspecified group data on the basis of a corresponding region ID in order to transmit the same contents to terminals in a region-based unspecified group, as a message; a second step of requesting, by the SCS, a machine type communication-group delivery function (MTC-GDF) to transmit unspecified group data; a third step of inquiring, by the MTC-GDF, group information on the basis of the corresponding region ID corresponding to the request for the transmission of the unspecified group data to obtain information on members of the terminals in the group; a fourth step of transmitting, by the MTC-GDF, an MT NIDD request message to a service capability exposure function (SCEF) to transmit a group message to the terminals in the inquired group; a fifth step of delivering, by the SCEF, the MT NIDD request message received from the MTC-GDF to an MME; and a sixth step of individually transmitting, by the MME, the MT NIDD request message to each NB-IoT terminal.

Description

METHOD AND APPARATUS FOR TRANSMITTING GROUP MESSAGES BASED ON NB-IOT BACKGROUND OF THE INVENTION [0001]

The present invention relates to an NB-IoT-based group message transmission method and apparatus, and more particularly, to an apparatus and method for transmitting a group message to an NB-IoT terminal belonging to a specific group or an unspecified group.

The NB-IoT (Narrow Band-Internet of Things) refers to a technology capable of transmitting and receiving low-capacity data of several kilobytes (KB) or less between things and a base station in a narrow band with low power, Things are attracting attention with the spread of Internet technology.

Meanwhile, 3GPP TS 23.682 (V14.1.0) uses an MBMS (Multimedia Broadcast / Multicast Service) capable of simultaneously transmitting an IP multicast-based data packet to a plurality of users for group message transmission of an MTC terminal (or UE) . Here, MTC (Machine Type Communications) refers to a communication method in which one or more machines are included, and refers to M2M (Machine-to-Machine) communication or object communication. Also, a machine means an entity that does not require direct human intervention.

However, in the standard specification (3GPP TS 36.331) defining the service requirements of the NB-IoT terminal (or UE), there are restrictions on various functions provided by the conventional LTE protocol with the aim of low power and low cost, and the RRC (Radio Resource Control) But also broadcast functions such as Multimedia Broadcast / Multicast Service (MBMS) and Public Warning Systems (PWS), which are provided as protocols. Therefore, a standard for transmitting a group message to an NB-IoT terminal (or UE) has not been proposed yet.

Also, in the standard specification (3GPP TS 36.331) defining the service requirements of the NB-IoT terminal (or UE), when an event occurs in one of the NB-IoT terminals (or UEs) belonging to a specific group, There is no particular mention about a method of transmitting a message to an IO terminal (or UE).

In this respect, there is a demand for a method of allowing a NB-IoT terminal to transmit a group message and a NB-IoT terminal group to be managed by designating a specific group or an unspecified group.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an apparatus and method for transmitting a group message to an NB-IoT terminal.

It is another object of the present invention to provide an apparatus and method for transmitting a message from an NB-IoT terminal belonging to a specific group to another NB-IoT terminal belonging to the group.

The present invention also provides an apparatus and method for allowing a NB-IoT terminal to transmit a group message by specifying a specific group or an unspecified group, and managing a group composed of NB-IoT terminals. .

It is another object of the present invention to provide a method and apparatus for transmitting a MTNID group message based on an NB-IoT terminal.

According to an aspect of the present invention, there is provided a method of transmitting a group message based on NB-IoT, the method comprising: transmitting, by an application server (AS), an identical content to a terminal in an unspecified group based on a region, A first step of requesting an unspecified group data transmission to a Services Capability Server (SCS); A second step of the SCS requesting an unspecified group data transmission using an MTC-GDF (Machine Type Communication-Group Delivery Function); A third step of the MTC-GDF inquiring the group information based on the corresponding area ID corresponding to the unspecified group data transmission request and obtaining information about the terminal members in the group; A fourth step of the MTC-GDF transmitting a MT NIDD request message to a Service Capability Exposure Function (SCEF) in order to transmit a group message to the terminals in the inquired group; A fifth step of transmitting an MT NIDD request message received from the MTC-GDF to the MME; And a sixth step of individually transmitting an MT NIDD request message to each of the NB-IoT terminals by the MME.

Here, the NB-IoT terminal may transmit its location information to the MME at a specific period, the MME may transmit the location information of the terminal to the HSS, and the HSS may update the location information of the terminal .

In addition, the MTC-GDF transmits a location information request registration signal to the HSS for the NB-IoT terminal which desires to receive the location information, and the location information of the NB-IoT terminal corresponding to the received location information request registration signal from the HSS to the MTC -GDF; And the MTC-GDF may group and store information according to the area ID based on the received location information of the corresponding terminal.

According to another aspect of the present invention, there is provided a method of transmitting a group message based on NB-IoT, the method comprising: transmitting, by a AS (Application Server) to a terminal within a specific group based on a group ID, A first step of requesting transmission to a Services Capability Server (SCS); A second step of the SCS requesting transmission of a specific group data by a MTC-GDF (Machine Type Communication-Group Delivery Function); A third step of the MTC-GDF inquiring the group information based on the corresponding group ID corresponding to the specific group data transmission request and acquiring information about the terminal members in the group; A fourth step of the MTC-GDF transmitting a MT NIDD request message to a Service Capability Exposure Function (SCEF) in order to transmit a group message to the terminals in the inquired group; A fifth step of transmitting an MT NIDD request message received from the MTC-GDF to the MME; And a sixth step of individually transmitting an MT NIDD request message to each of the NB-IoT terminals by the MME.

Here, when the AS desires to add / delete / change a terminal in a specific group, transmitting a group management request signal to the SCS based on the group ID; SCS transmits a group management request signal to the MTC-GDF; And the MTC-GDF may inquire the group information based on the group ID corresponding to the group management request signal to perform the add / delete / change procedure for the terminal members in the group.

According to the present invention, an apparatus and method for transmitting a group message to an NB-IoT terminal can be provided.

In addition, the present invention can provide an apparatus and method for transmitting a message from an NB-IoT terminal belonging to a specific group to another NB-IoT terminal belonging to the group.

In addition, the present invention can provide an apparatus and method for allowing a NB-IoT terminal to transmit a group message by specifying a specific group or an unspecified group, and managing a group composed of NB-IoT terminals.

In addition, the present invention can provide a method and apparatus for transmitting an MT NIDD group message based on an NB-IoT terminal.

1 is a diagram illustrating a connection relationship between an NB-IoT-based group message transmission apparatus 100 according to the present invention and other components on a network.
2 is a flowchart illustrating a process of storing location information of an NB-IoT terminal for unspecified (area-based) group data transmission.
FIG. 3 is a flowchart illustrating a process of performing a specific group information management (addition / modification / deletion / inquiry) request.
4 is a flowchart illustrating an unspecified (region-based) group data transfer procedure.
5 is a flowchart showing a specific group data transfer procedure.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram illustrating a connection relationship between an NB-IoT-based group message transmission apparatus 100 according to the present invention and other components on a network.

Referring to FIG. 1, an NB-IoT-based group message transmission apparatus (hereinafter referred to as "MTC-GDF") 100 is based on 3GPP TS 23.682 , And a service terminating non-IP data delivery (MTNID) group message to the NB-IoT terminal (MTC UE) in cooperation with the HSS (Home Subscriber Server) and the SCS (Services Capability Server) And performs the function of transmitting. The MTC-GDF 100 may operate in conjunction with the SCEF.

The main components shown in FIG. 1 and the main terms used in the present invention are as follows.

NB-IoT (Narrow Band-Internet of Things): A technology that maximizes efficiency by transmitting and receiving low-capacity data at a low number of kilobytes (KB) between a thing and a base station in a narrow band

MTC (Machine Type Communications): means a communication method that includes one or more machines, and is referred to as M2M (Machine-to-Machine) communication or object communication. A machine is an entity that does not require human intervention.

MBMS (Multimedia Broadcast / Multicast Service): Multimedia Broadcast / Multicast Service (MBMS) in a 3G mobile communication network without a separate broadcasting frequency enables a large number of users to receive the same multimedia data, thereby increasing resource efficiency. Allow

HSS (Home Subscriber Server): It stores the key information for authentication of each terminal and the subscriber's profile (service authorization, authentication, status, etc.)

SCS (Services Capability Server): An entity for communicating with the MTC InterWorking Function (MTC-IWF) and MTC terminal on the Home PLMN (HPLMN). It is connected to the 3GPP network.

SCEF: (Service Capability Exposure Function): It is an entity that exposes 3GPP network to external server securely. It communicates with 3GPP network entity such as HSS in order to receive message from external server SCS / AS and manage terminal group.

MME is an element that performs signaling and control functions to support access to a network connection of UE (User Equipment), network resource allocation, tracking, paging, roaming, handover,

Non-IP Data Delivery (NIDD): A method in which MTC terminal transmits data using non-IP based non-IP based control plane such as IMSI and external identity. Mobile Originating / MT (Mobile Terminating) are classified according to the direction of data.

The MTC-GDF 100 shown in FIG. 1 stores NB-IoT terminal location information for unspecified (region-based) group data transmission, and specific group information management (addition) in cooperation with a wireless communication system of HSS, SCS / / Modify / delete / inquiry) request, unspecified (area based) group data transmission, and specific group data transmission.

The overall function of the MTC-GDF 100 will be described as follows.

- MTC UE location information management function for unspecified group messages

- Group management function for specific group messages

- NIDD group data transmission processing function linked with SCEF

- HSS interworking function

- SCS / AS interworking function

- Ability to receive location information of MTC UE from HSS

- Group management (addition / modification / deletion / inquiry) from SCS / AS and reception of group data transmission request function

Next, the operation of the MTC-GDF 100 will be described in detail with reference to FIG. 2 and the following figures.

2 is a flowchart illustrating a process of storing location information of an NB-IoT terminal for unspecified (area-based) group data transmission.

Referring to FIG. 2, first, the MTC-GDF 100 performs a location information request subscribe to an HSS for an NB-IoT terminal that desires to receive location information. Here, the new NB-IoT terminal information to be registered must be recognized by the MTC-GDF 100 in advance through various methods.

On the other hand, when the location information (base station, cell information, etc.) of the NB-IoT terminal (MTC UE) is changed, the NB-IoT terminal transmits the TAU (Tracking Area Update) message to the MME at a specific period.

The MME transmits the location information of the corresponding terminal to the HSS, and the HSS updates the location information of the terminal.

Next, the HSS notifies the MTC-GDF 100 of the changed location information for the terminal that has subscribed to the location information request.

The MTC-GDF 100 stores and manages information by grouping by area ID based on the location information of the corresponding terminal notified.

FIG. 3 is a flowchart illustrating a process of performing a specific group information management (addition / modification / deletion / inquiry) request.

Referring to FIG. 3, when an application server (AS) wants to add / delete / change a terminal in a specific group, the application server calls a group management request Open API in the SCS based on the group ID. Here, the group related Open API is provided by the MTC-GDF 100.

After the SCS performs the authentication for the corresponding AS, it transfers the corresponding group related API to the MTC-GDF 100.

After the MTC-GDF 100 performs authentication for the requested Open API, the MTC-GDF 100 inquires the group information based on the group ID, performs addition / deletion / modification on the terminal members in the group, and stores and manages the result .

The AS can then query the information in a particular group at any time through the Open API.

4 is a flowchart illustrating an unspecified (region-based) group data transfer procedure.

Referring to FIG. 4, when an AS transmits an identical content message to a terminal in an unspecified group based on a region, it calls an unspecified Group Data Transmission Request Open API to the SCS based on the corresponding region ID. Here, the group-related Open API is provided by MTC-GDF.

After performing the authentication for the AS, the SCS transfers the API related to the group data transmission to the MTC-GDF 100.

The MTC-GDF 100 performs authentication for the requested Open API, inquires the group information based on the corresponding area ID, and obtains information about the terminal members in the group.

The MTC-GDF 100 transmits MT NIDD request messages individually to the terminals in the group through the SCEF. Since the retransmitted message may need to be retransmitted according to the UE status, the transmitted messages are queued.

The SCEF forwards the MT NIDD request message of the MTC-GDF 100 to the MME, and upon receiving the request confirmation message, forwards the message to the MTC-GDF 100.

The MME individually transmits the MT NIDD request message to each of the NB-IoT terminals.

Meanwhile, the MTC-GDF 100 can notify the result of the transmission to the unspecified group based on the area based on the SCS / AS.

5 is a flowchart showing a specific group data transfer procedure.

Referring to Figure 5, When the AS wants to transmit a message with the same contents to a terminal in a specific group based on the group ID, it invokes a specific group data transmission request Open API in the SCS based on the group ID. Here, the group-related Open API is provided by MTC-GDF.

After performing the authentication for the AS, the SCS transfers the API related to the group data transmission to the MTC-GDF 100.

The MTC-GDF 100 performs authentication for the requested Open API, inquires the group information based on the group ID, and obtains information about the terminal members in the group.

The MTC-GDF 100 transmits MT NIDD messages individually to the terminals in the group through the SCEF. Since the retransmitted message may need to be retransmitted according to the UE status, the UE performs queuing processing on the messages.

The SCEF forwards the MT NIDD request message of the MTC-GDF 100 to the MME, and upon receiving the request confirmation message, forwards the message to the MTC-GDF 100.

The MME individually transmits the MT NIDD request message to each of the NB-IoT terminals.

The MTC-GDF 100 may notify the result to the SCS / AS of the transmission result for the specific group based on the group ID.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.

MTC-GDF (Machine Type Communication-Group Delivery Function): 100

Claims (5)

A method of transmitting group message based on NB-IoT,
A first step of an AS (Application Server) requesting an SCS (Services Capability Server) for transmitting unspecified group data based on a corresponding area ID in order to transmit the same contents to a terminal in an unspecified group based on the area;
A second step of the SCS requesting an unspecified group data transmission using an MTC-GDF (Machine Type Communication-Group Delivery Function);
A third step of the MTC-GDF inquiring the group information based on the corresponding area ID corresponding to the unspecified group data transmission request and obtaining information about the terminal members in the group;
A fourth step of the MTC-GDF transmitting a MT NIDD request message to a Service Capability Exposure Function (SCEF) in order to transmit a group message to the terminals in the inquired group;
A fifth step of transmitting an MT NIDD request message received from the MTC-GDF to the MME; And
The sixth step in which the MME individually transmits the MT NIDD request message to each of the NB-IoT terminals
Wherein the NB-IoT-based group message transmission method comprises:
The method according to claim 1,
Wherein the NB-IoT terminal transmits its location information to the MME at a specific period, the MME transmits location information of the terminal to the HSS, and the HSS updates location information of the terminal. -IoT-based group message transmission method.
3. The method of claim 2,
The MTC-GDF transmits a location information request registration signal to the HSS for the NB-IoT terminal to which the MTC-GDF desires to receive location information, and the location information of the NB-IoT terminal corresponding to the received location information request registration signal from the HSS, ; And
The MTC-GDF groups and stores information according to the area IDs based on the received location information of the corresponding terminal
And transmitting the group message to the base station.
A method of transmitting group message based on NB-IoT,
A first step of requesting a service capability server (SCS) for transmission of a specific group data based on the group ID so that an AS (Application Server) transmits the same contents to a terminal within a specific group based on the group ID;
A second step of the SCS requesting transmission of a specific group data by a MTC-GDF (Machine Type Communication-Group Delivery Function);
A third step of the MTC-GDF inquiring the group information based on the corresponding group ID corresponding to the specific group data transmission request and acquiring information about the terminal members in the group;
A fourth step of the MTC-GDF transmitting a MT NIDD request message to a Service Capability Exposure Function (SCEF) in order to transmit a group message to the terminals in the inquired group;
A fifth step of transmitting an MT NIDD request message received from the MTC-GDF to the MME; And
The sixth step in which the MME individually transmits the MT NIDD request message to each of the NB-IoT terminals
Wherein the NB-IoT-based group message transmission method comprises:
5. The method of claim 4,
When the AS wants to add / delete / change a terminal in a specific group, transmitting a group management request signal to the SCS based on the group ID;
SCS transmits a group management request signal to the MTC-GDF; And
The MTC-GDF inquires the group information based on the group ID corresponding to the group management request signal and performs the add / delete / change procedure for the terminal members in the group
And transmitting the group message to the base station.

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