WO2013051898A2

WO2013051898A2 - Trigger request transfer server, method for transferring a trigger request of a server, communication network and terminal trigger method in a communication network

Info

Publication number: WO2013051898A2
Application number: PCT/KR2012/008099
Authority: WO
Inventors: 홍성표; 조수현; 이현송; 이성훈
Original assignee: 주식회사 케이티
Priority date: 2011-10-07
Filing date: 2012-10-05
Publication date: 2013-04-11
Also published as: KR20130038002A; WO2013051898A3

Abstract

The present invention relates to a control function relating to a trigger in a communication network for machine-type communication.

Description

Trigger request delivery server, server trigger request delivery method, communication network, and terminal trigger method of communication network

The present invention relates to a control function associated with a trigger in a communication network for mechanical communication.

Machine Type Communication (MTC) is a form of data communication that represents a machine or machine to machine communication in which one or more entities do not or require minimal human interaction. An MTC device user terminal (or MTC device) such as an electric meter, gas meter, or vending machine equipped with a mobile communication module may control an MTC device and collect data through a wireless network of a mobile operator (eg, a service capability server or Communication with the MTC application server).

Many MTC application services provided through MTC communication rarely transmit data at long time intervals. In the case of such an application service, the MTC user may periodically allow the MTC device to start data communication through the wireless network of the mobile communication provider to transmit data to the MTC server. However, in another way, the MTC device initiates data communication through the mobile operator's wireless network at the request of the MTC server for control and management of the MTC device, collection of data on demand, and the like. You can also communicate with the MTC server. As in the latter case, the MTC device transmits a trigger request of the MTC server through the wireless network of the mobile communication operator, and the MTC device receiving the trigger request initiates data communication through the wireless network of the mobile communication operator to communicate with the MTC server. This is called triggering.

Need to trigger multiple MTC devices simultaneously with the same or similar properties (e.g., same service provider, same user, same application, same geographic location, etc.) in a carrier's wireless network that accommodates a large number of MTC devices There can be. In this case, a method of triggering on a group consisting of a plurality of MTC devices may be required.

An object of the present invention is to provide a system and method for triggering a terminal on a group basis in a communication network for mechanical communication.

One embodiment of the present invention, the server interface module for receiving a trigger request from an external server; A trigger determination module for determining a trigger request delivery method for determining a trigger method based on at least one of information included in the trigger request and communication network information; And a trigger forwarding interface module configured to forward a trigger request to an entity determined based on the trigger request forwarding method.

According to another embodiment of the present invention, a trigger request is received from an external server, a trigger request forwarding method is determined based on the information and communication network information included in the trigger request, and the trigger is performed on the entity determined based on the trigger request forwarding method. An access server for forwarding the request; And a short message service entity configured to receive a trigger request from the access server and transmit a short message including the trigger request to the terminal.

According to another embodiment of the present invention, a trigger request is received from an external server, a trigger request forwarding method is determined based on the information and communication network information included in the trigger request, and the trigger is performed on the entity determined based on the trigger request forwarding method. An access server for forwarding the request; And a paging entity that receives a trigger request from the access server and transmits a paging including the trigger request to a terminal.

According to another embodiment of the present invention, a trigger request is received from an external server, a trigger request forwarding method is determined based on the information and communication network information included in the trigger request, and the trigger is performed on the entity determined based on the trigger request forwarding method. An access server for forwarding the request; And a broadcast entity that receives a trigger request from the access server and transmits a broadcast message including the trigger request to a terminal through a broadcast channel.

Another embodiment of the invention, receiving a trigger request from an external server; Determining a trigger request delivery method for determining a trigger method based on at least one of information included in the trigger request and communication network information; And forwarding a trigger request to the entity determined based on the trigger request forwarding method.

Another embodiment of the invention, the access server receives the trigger request from the external server; Determining, by the access server, a trigger request delivery method based on information included in the trigger request and communication network information; Forwarding, by the access server, a trigger request to an entity determined based on the trigger request delivery method; And a short message service entity receiving the trigger request from the access server, transmitting the short message including the trigger request to the terminal.

Another embodiment of the invention, the access server receives the trigger request from the external server; Determining, by the access server, a trigger request delivery method based on information included in the trigger request and communication network information; Forwarding, by the access server, a trigger request to an entity determined based on the trigger request delivery method; And transmitting, by the paging entity receiving the trigger request from the access server, a paging including the trigger request to the terminal.

Another embodiment of the invention, the access server receives the trigger request from the external server; Determining, by the access server, a trigger request delivery method based on information included in the trigger request and communication network information; Forwarding, by the access server, a trigger request to an entity determined based on the trigger request delivery method; And a broadcast entity receiving a trigger request from the access server, transmitting a broadcast message including the trigger request to a terminal through a broadcast channel.

According to the present invention described above, a system and method for triggering a terminal on a group basis in a communication network for mechanical communication is provided.

1 illustrates an example of a network system for an MTC.

2 illustrates a method of device triggering using SMS.

3 illustrates a method of device triggering using a paging channel.

4 illustrates a method of device triggering using a broadcast channel.

5 illustrates a method of device triggering using SMS broadcast.

6 illustrates a group triggering control level according to an embodiment of the present invention.

FIG. 7 shows a flowchart of a triggering method in FIG. 6.

FIG. 8 shows the detailed steps of step S702 in FIG. 7.

9 illustrates a configuration of the MTC-IWF according to an embodiment.

Hereinafter, some embodiments of the present invention will be described in detail with reference to the accompanying drawings. In adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are assigned to the same components as much as possible even though they are shown in different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

This specification will be described based on machine type communication (MTC). MTC may be variously called as M2M communication (Machine to Machine Communication), Internet of Things (IoT), Smart Device Communication, Machine Oriented Communication, and the like.

MTC is a form of data communication that represents a machine or machine-to-machine communication where one or more entities do not or require minimal human interaction. An MTC device user terminal (or MTC device) such as an electric meter, gas meter, or vending machine equipped with a mobile communication module may communicate with an MTC server that controls the MTC device and collects data through a wireless network of a mobile communication operator. .

Many MTC application services provided through MTC have a feature of rarely transmitting data at long time intervals. In the case of such an application service, the MTC user may periodically allow the MTC device to start data communication through the wireless network of the mobile communication provider to transmit data to the MTC server. However, in another way, the MTC device initiates data communication through the mobile operator's wireless network at the request of the MTC server for control and management of the MTC device, collection of data on demand, and the like. You can also communicate with the MTC server. As in the latter case, the MTC device transmits a trigger request of the MTC server through the wireless network of the mobile communication operator, and the MTC device receiving the trigger request initiates data communication through the wireless network of the mobile communication operator to communicate with the MTC server. This is called triggering.

1 illustrates an example of a network system for an MTC. The example shown in FIG. 1 is a structure under consideration in the 3rd Generation Partnership Project (3GPP), but the present invention is not limited to the system shown in FIG.

Referring to FIG. 1, an MTC user 110 who wants to use a user equipment (UE) 120 may access an M2M application 130. In FIG. 1, the terminal 120 is an MTC device. The M2M application 130 may communicate with the M2M application 122 of the terminal 120 at the level of the application program. The M2M application 130 may be operated by a service provider (SP).

The M2M application 130 may communicate with the terminal 120 through a network. In one example, the M2M application 130 may be directly connected to the network to communicate with the terminal 120 (Direct Model).

Alternatively, the M2M application 130 may be connected to the network through the MTC server 140 to communicate with the terminal 120 (Indirect Model). The MTC server 140 may be operated by a service provider or operated by a mobile network operator (MNO).

The wireless network operated by the mobile network operator includes a Radio Access Network (RAN) 150 and a Core Network (CN). In the example of FIG. 1, the core network is a home location register / home subscriber server (HLR / HSS) 162, a serving GPRS support node / mobility management entity (SGN / MME) 164, a cell broadcast center (CBC) 166. ), SMS-SC / IP-SM-GW (Short Message Service-Service Center / IP-Short Message-GateWay) 168, Machine Type Communication-InterWorking Function (MTC-IWF) 170, and GGSN / PGW / An ePDG (Gateway GPRS Support Node / Packet Data Network GateWay / enhanced Packet Data Gateway) 172 may be included.

In order for the terminal 120 to communicate with the MTC server 140 via the mobile network operator's wireless network, the MTC user 110 allows the terminal 120 to periodically communicate with the MTC server 140 via the network. Can be set.

Alternatively, in order to control and manage the terminal 120 and collect data on demand, the MTC user 110 may use the terminal 120 based on a request of the MTC server 140 at any time. It may trigger to communicate with the MTC server 140 via this wireless network. The network transmits the trigger request of the MTC server 140 to the terminal 120, and the terminal 120 receiving the trigger request initiates data communication through the network to communicate with the MTC server 140 is called MTC device triggering. Can be called

In order to facilitate device triggering of a plurality of MTC servers 140 in a wireless network of a mobile network operator accommodating a large terminal 120, an MTC server receiving a trigger request of the MTC server 140 and transmitting a trigger request ( Device triggering control functions such as MTC server authentication, trigger request authorization, charging, trigger delivery mechanism selection, and terminal identifier mapping. MTC-IWF 170 may be required to perform.

MTC-IWF 170 may be implemented as a separate entity or as part of other wireless network equipment. The MTC server 140 may transmit a trigger request to the MTC-IWF 170 by resolving an IP address of the MTC-IWF 170 that performs a device triggering control function for a specific terminal.

The MTC-IWF 170 may select a trigger delivery mechanism by a trigger request of the MTC server 140. Trigger delivery mechanisms include a method of using a short message service (SMS), a method of using a paging channel, a method of using a broadcast channel, and a method of using a cell broadcast service (CBS).

2 illustrates a method of device triggering using SMS. The method using SMS can be mainly used for a terminal attached to a network. 2, the MTC server 140 transmits a trigger request to the SMS-SC 168 (S201), and the SMS-SC 168 transmits a trigger request in the form of a short message to the terminal 120 ( S202). Upon receiving the trigger request, the terminal 120 starts data communication with the MTC server 140 (S203). The address of the MTC server 140 may be included in the short message.

3 illustrates a method of device triggering using a paging channel. The method using the paging channel can be used not only for the registered terminal but also for a terminal that is not registered and knows its location in the network. Referring to FIG. 3, the MTC server 140 transmits a trigger request to the HLR / HSS 162 (S301), and the HLR / HSS 162 currently sends the SGSN / MME 164 to service the terminal 120. Notify that there is a trigger request (S302). In this case, the notification of the trigger request may use the Insert Subscriber Data procedure used for user update of the SGSN / MME 164 between the HLR / HSS 162 and the SGSN / MME 164 (Insert Subscriber Data Request). SGSN / MME 164 notified of the trigger request responds to HLR / HSS 162 (Insert Subscriber Data Answer) (S303) and paging to terminal 120 (S304). The terminal 120 confirms that there is a trigger request from the SGSN / MME 164 in the network registration process and starts data communication with the MTC server 140 (S305). The address of the MTC server 140 may be preconfigured in the terminal 120 or included in the trigger request information.

4 illustrates a method of device triggering using a broadcast channel. The method using the broadcast channel can be used not only for registered terminals but also for terminals which are not registered and whose location is known in the network. Referring to FIG. 4, the MTC server 140 transmits a trigger request to a node of a core network (S401). The core network node may be the HLR / HSS 162, the CBC 166, and the GGSN / PGW / ePDG 172. The core network node is a node (cell or cell group) of the RAN 150 where the terminal 120 is located by using the identifier information of the terminal 120 to be triggered received from the MTC server 140. The update request is transmitted to broadcast the trigger request indication (S402). The identifier information of the terminal 120 to be triggered may be identifier information (eg, International Mobile Subscriber Identity (IMSI), etc.) of the individual terminal or identifier information of the terminal group. The location information of the terminal 120 to be triggered is preconfigured in the HLR / HSS 162 so that the core network node can know the location of the RAN.

The RAN node broadcasts a system information block (SIB) through a broadcast channel (S403). The system information block used for the trigger may be defined as a new system information block or may utilize an existing system information block (eg, SIB10, SIB11, and SIB12 for disaster warning broadcast based on a public warning system (PWS)). A paging message may be used to allow an idle mode terminal to receive a message broadcast through a system information block. Upon receiving the trigger request through the broadcast channel, the terminal 120 initiates data communication with the MTC server 140 (S404).

In FIG. 4, the core network node may be a CBC 166 which is a server used when using the CBS, and the RAN node may be a base station, a Node-B, an evolved Node-B (eNodeB), a Radio Network Controller (RNC), and a BTS (Base). It may be a transmitting end that may be called a term such as a transceiver system, an access point, a base station controller (BSC), or the like.

5 illustrates a method of device triggering using SMS broadcast. The method using SMS broadcast can be used not only for registered terminals but also for terminals which are not registered and whose location is known in the network. According to 3GPP TS23.041, an SMS broadcast indicates a message for providing a cell broadcast service in a GSM / UMTS radio access network. Referring to FIG. 5, the MTC server 140 transmits a CBS (Cell Broadcast Service) message including a trigger request to the CBC 166 (S501). The trigger request information may include information on a specific geographic area for delivering the cell broadcast message or identifier information of the terminal 120 to be triggered. The identifier information of the terminal to be triggered may be identifier information (eg, IMSI) of the individual terminal 120 or identifier information of the group. The broadcast area information may consist of one or more cells or all PLMNs. The CBC 166 transfers the new CBS message to the RNC / BTS through the Write / Replace message (S502). The RNC / BTS transfers the CBS message to the terminal 120 using the SMS BROADCAST COMMAND (S503). Thereafter, the RNC / BTS reports to the CBC 166 that the CBS message has been successfully broadcasted (S504). The CBC 166 reports that the CBS message has been successfully transmitted to the MTC server 140 (S505). Upon receiving the trigger request, the terminal 120 starts data communication with the MTC server 140 (S506).

One or more terminals belonging to the same subscriber may be referred to as an MTC group, and a method of performing device triggering on the MTC group may include the following methods.

As one method, there is a method in which the MTC server 140 repeatedly performs a device triggering procedure for each of the terminals 120 belonging to the MTC group. This method consumes a lot of network resources in the process of transmitting the trigger request from the MTC server 140 to the terminal 120 through the wireless network.

As another method, there is a method of using an MTC group identifier as a terminal identifier while performing device triggering using a broadcast channel.

These two methods may be effective when the terminals belonging to the MTC group are concentrated in a specific geographic area, but may be inefficient when the terminals belonging to the MTC group are scattered geographically.

On the other hand, the method using the broadcast channel or SMS broadcast is not a MTC terminal, but a general terminal and MTC terminal not belonging to a specific MTC group because the message through the broadcast channel or SMS broadcast is received by all user terminals in the cell In addition, trigger messages that are not needed may be received. The broadcast channel is shared by all terminals in the cell, which may increase the performance of the broadcast channel, causing performance degradation for other terminals.

FIG. 6 illustrates a group triggering control plane according to an embodiment of the present invention, and FIG. 7 illustrates a flowchart of a triggering method in FIG. 6. Each line in FIG. 6 represents a transmission path of a triggering message. For convenience of description, some entities shown in FIG. 1 are omitted.

6 and 7, the MTC server 140 transmits a group trigger request message to the MTC-IWF 170 (S701). The MTC-IWF 170 determines the trigger forwarding method based on the attribute included in the received group trigger request message (S702), and based on the determined method, the network entity (SMS-SC / IP-SM in the example of FIG. 5). GW 168, SGSN / MME 164, CBC 166, etc.) transmits a group trigger request message (S703). That is, in case of group triggering using SMS, MTC-IWF 170 transmits a trigger message to SMS-SC / IP-SM-GW 168, and in case of group triggering using paging, MTC- The IWF 170 sends a trigger message to the SGSN / MME 164, and when performing group triggering using broadcast, the MTC-IWF 170 sends a core network node (e.g., the CBC 166). You can pass trigger messages. The entity receiving the trigger request message from the MTC-IWF 170 transmits a trigger request message to each terminal 120 of the group (S704), and each terminal 120 receiving the trigger request message is the MTC server 140. Communication with the system is started (S705).

In step S601 in which the MTC server 140 requests a group trigger to the MTC-IWF 170, the MTC server 140 pre-configures the IP address of the MTC-IWF 170 to forward a request for a specific MTC group. The known or preconfigured domain name of the MTC-IWF 170 can be used to solve the problem. The group trigger request message transmitted by the MTC server 140 to the MTC-IWF 170 may include some or all of the information shown in Table 1 below.

Table 1

parameter	Parameter description
Validity time	Time information for saving trigger request in network when trigger request is not delivered to terminal
MTC Group identifier	Information for identifying a group consisting of terminals belonging to the same user, such as an external identifier of an individual group (eg Mobile Subscriber Integrated Services Digital Network Number (MSISDN), Fully Qualified Domain Name (FQDN), Network Access Identifier (NAI), SIP) (Session Initiation Protocol) URI (Uniform Resource Identifier), IP address, etc.) can be used, and it is configured to distinguish the identifier used as a group identifier in the wireless network of the mobile carrier. NAI is a standard way of identifying users requesting access from a network, in the form username @ realm according to section 2.1 of RTC 4282.
Display group triggering	Information indicating that the trigger request is group triggering
MTC Server Identifier	The external identifier of the MTC device may be used as information for identifying an MTC server capable of requesting device triggering through a mobile carrier's wireless network.
Trigger application ID	Identifier information of trigger application / function to be operated in MTC device user terminal by trigger request of MTC server
Priority	Priority and urgency information that may be needed to determine whether to handle in an overloaded state (eg whether to handle device triggering in the case of a large number of trigger requests to handle relative to network capacity).
Trigger delivery method	Method of transmitting trigger request through wireless network of mobile carrier (eg triggering using SMS, method using CBS, etc.)
MTC Group Location Information	Fixed location information of MTC device user terminals belonging to the MTC group. The MTC group location information may be one or more cell information in the mobile network or specific geographic information allocated in accordance with a mutual agreement with the mobile network operator.
List of individual terminal identifiers included in MTC group	List of external identifiers (eg MSISDN, FQDN, NAI, etc.) of terminals included in MTC group
Target application specific information	Specific information that can be used by the final destination application of the MTC device that received the trigger request (eg target application port number, URL, etc.)

FIG. 8 shows the detailed steps of step S702 of FIG. 7.

In step S702, the MTC-IWF 170 authenticates the MTC server 140 and authorizes whether the MTC server 140 has authority to the group trigger request (S801). For authentication to the MTC server 140, identifier information (e.g., MSISDN, FQDN, NAI, SIP URI, IP address, etc.) of the MTC server 140 that may request group triggering and / or individual triggering may be MTC. It may be preconfigured in the IWF 170. For authorization to the MTC server 140, information that can determine whether the MTC server 140 capable of group triggering for a specific MTC group is pre-configured in the MTC-IWF 170 or the HLR / HSS 162 Can be queried through. To this end, the HLR / HSS 162 may manage new group-specific information related to the MTC group. The group information includes group identifier information (for example, MSISDN, FQDN, NAI, SIP URI, IP address, etc.) set for each group, external identifiers of individual terminals included in the group (for example, MSISDN, FQDN, NAI, SIP). URI, IP address, etc.), an IMSI list of individual terminals included in the group, and identifier information of the MTC server capable of requesting a group trigger.

The MTC-IWF 170 determines whether the trigger request message is a duplicate message that is duplicated with a previously received trigger request message (S802). The group identifier information (or terminal identifier list) and / or MTC server identifier in the trigger request message are the same as the group identifier information (or terminal identifier list) and / or MTC server identifier included in the previously received trigger request signal, and the trigger If the request message is received within the valid time of the previously received trigger request signal, the MTC-IWF 170 determines that the trigger request message is a duplicate message. If it is determined that the trigger request message is a duplicate message, the MTC-IWF 170 may report this to the MTC server 140.

The MTC-IWF 170 may extract the IMSI list of the individual terminals 120 included in the group through the group identifier information, the terminal identifier list, the terminal IMSI list, and the like (S803). Such information may be included in a trigger request from the MTC server 140, preconfigured in the MTC-IWF 170, or viewed through the HLR / HSS 162. In addition, the group identifier information, the mapping information of the terminal identifier list and the terminal IMSI list may be pre-configured in the MTC-IWF 170 or may be inquired through the HLR / HSS 162.

A specific cell or group of cells that delivers a paging message or broadcast message in the wireless access network even when the MTC group location information is not received by the MTC server or the MTC group location information is received by the MTC server. ) Or when the identification information about the tracking area or the routing area cannot be directly extracted, the MTC-IWF 170 may inquire the location information of the individual terminal 120 belonging to the group (S804). The location information of the individual terminal 120 may be pre-configured in the MTC-IWF 170 or may be inquired through the HLR / HSS 162 and the SGSN / MME 164. To this end, the HLR / HSS 162 may manage the attribute information indicating the fixed location of the individual terminal 120 belonging to the group and / or the location information of the individual terminal 120, and when the terminal 120 is registered In order to verify the terminal 120 through the SGSN / MME 164 to service. For example, the HLR / HSS 162 may include one or more flags of EPS Location Information Request and Current Location Request on IDR-flag in an Insert Subscriber Data Request message. Set and send to the SGSN / MME 164, the SGSN / MME 164 may pass the corresponding location information to the HLR / HSS (162).

If the latest location information request bit is set and the UE is in idle mode, the MME / SGSN 164 may page the UE to return the cell information of the most recent UE. If the latest location information request bit is set and the UE is in connected mode, the MME S1AP Location Reporting Control procedure to the eNodeB before reporting to return the cell information of the most recent UE. E-UTRAN Cell Global Identification (ECGI) information can be retrieved using.

The MTC-IWF 170 may inquire connection state (reachability) information of the individual terminal 120 belonging to the group (S805). The connection state information of the individual terminal 120 may be inquired through the HLR / HSS 162 using the IMSI information of the individual terminal 120.

The MTC-IWF 170 may inquire load information of the cell where the individual terminal 120 belonging to the group is located (S806). In one example, load information lookup of a cell may be performed via the CBC 166. The MTC-IWF 170 may transmit a message to the CBC 166 with a request for load information of a cell including a list of location information of individual terminals 120 belonging to the group. The CBC 166 may transmit load information to the MTC-IWF 170 using a LOAD QUERY Request / Indication message, a LOAD QUERY Response / Confirm message, and the like defined in 3GPP TS25.419.

The MTC-IWF 170 may process information based on the location information and location information of the terminal 120 (for example, the number of terminals 120 belonging to a group in a specific cell), and connection state information of the terminal 120. Considering one or more of cell load information, a trigger forwarding method included in a trigger request message of the MTC server 140, a trigger forwarding method provided by a mobile operator through a wireless network, and an operation policy of another mobile carrier. The group triggering delivery method may be determined (S807).

For example, if the number of terminals 120 belonging to a group in a specific cell exceeds a predetermined number or ratio, a group triggering transmission method using a broadcast channel may be determined. Alternatively, if the terminal 120 exists in a low frequency in a large number of areas (cells), a group triggering delivery method using SMS or paging may be determined. Alternatively, when triggering the unregistered terminal 120, the group triggering delivery method using SMS may be excluded.

According to the operation policy of the mobile communication operator, the connection state inquiry of the individual terminal 120 or the load inquiry of the cell may not be performed or performed only in a specific situation such as a group trigger re-request by the MTC server 140 within a predetermined time. May be

The MTC-IWF 170 may inquire the information of the entity in the network to which the group trigger request is to be transmitted, based on the determined group trigger delivery method (S808). For example, SMS-SC 168 information for group trigger delivery through SMS, and SGSN / MME 164 information for serving an individual terminal 120 for group trigger delivery through paging, through broadcast For group trigger delivery, information of a core node such as CBC 166 is queried. The SMS-SC 168 information and the CBC 166 information may be preconfigured within the MTC-IWF 170. SGSN / MME 164 information may be queried through HLR / HSS 162.

The MTC-IWF 170 may transmit a trigger request message to the selected entity (S809). The trigger request message from the MTC-IWF 170 may include some or all of the information in Table 1. The information included in the trigger request message transmitted by the MTC server 140 to the MTC-IWF 170 may be different from the information included in the trigger request message transmitted by the MTC-IWF 170 to the selected entity. The information included in the trigger request message transmitted by the MTC-IWF 170 to the selected entity may vary depending on the selected entity.

After transmitting the trigger request message, the MTC-IWF 170 may generate charging data and transmit the charging data to the charging system of the mobile communication operator (S810). The charging data may include an identifier of the MTC server 140, an MTC group identifier, a list of identifiers of the individual terminals 120 included in the group, and the like.

The method described above with reference to FIG. 8 is merely an example and other order methods are possible. For example, the order of steps S802 to S806 may be changed.

9 illustrates a configuration of the MTC-IWF 170 according to an embodiment.

In order to execute the above-described process, referring to FIG. 9 illustrating the configuration of the MTC-IWF 170, the MTC-IWF 170 may include an MTC server interface module, an MTC server authentication module, a group trigger authority authorization module, and a group identifier. Mapping information extraction module, location inquiry module, connection status inquiry module of individual devices, cell load inquiry module, group trigger delivery method determination module, network object information inquiry module to be delivered, group trigger delivery interface, group triggering charging module, duplicate message determination module And the like.

According to each entity, the trigger request step S703 by the MTC-IWF 170 and the trigger request step S704 by each entity are described in detail below in FIG. 7.

When the MTC-IWF 170 determines the trigger delivery method using SMS, the MTC-IWF 170 transmits a trigger request message to the SMS-SC / IP-SM-GW 168. In this case, the trigger request message includes the identifier of the individual terminal 120 included in the group. When the terminal 120 can be identified through the MSISDN, the trigger request message may include an MSISDN list. If the terminal 120 cannot be identified through the MSISDN, the trigger request message may include an IMSI list.

When the SMS-SC / IP-SM-GW 168 receives the MSISDN list, the SMS-SC / IP-SM-GW 168 uses the MSISDN for each terminal 120 included in the MSISDN list. As with forwarding, request a trigger by sending a short message over the network. The called phone number included in the short message uses the MSISDN of the terminal 120.

When the SMS-SC / IP-SM-GW 168 receives the IMSI list, the SMS-SC / IP-SM-GW 168 sends a short message using the IMSI to each terminal 120 included in the IMSI list. Send a request for a trigger. The called phone number included in the short message uses an external identifier (eg, FQDN, NAI, SIP URI, IP address, etc.) of the terminal 120. To this end, the SMS-SC / IP-SM-GW 168 may query the HLR / HSS 162 for routing information (eg, SGSN / MME 164) using IMSI, and the HLR / HSS 162 may respond to the routing information inquiry request of the SMS-SC / IP-SM-GW 168.

When the MTC-IWF 170 determines a trigger delivery method using paging, the MTC-IWF 170 transmits a trigger request message to the HLR / HSS 162. The trigger request message may include a group identifier and / or an IMSI list of the terminal 120 included in the group. As described above in steps S302 to S305 of FIG. 3, the HLR / HSS 162 may request a trigger to the SGSN / MME 164, and the SGSN / MME 164 may page the terminal 120.

When the MTC-IWF 170 determines a trigger delivery method using a broadcast (a method using a system information block or a method using an SMS broadcast through the broadcast channel), the MTC-IWF 170 is a core network node ( For example, the CBC 166 sends a trigger request message. The core network node delivers / updates information to be broadcast to the RAN node, and the RAN node broadcasts a trigger request message to all terminals in the cell.

In such a case, the broadcast message may include a message identifier, a group identifier, and / or a terminal identifier (or terminal identifier) in order for another terminal (non-MTC terminal) to ignore the received broadcast message, which is not intended for triggering. List). The message identifier may indicate whether the broadcast message is a message for MTC device triggering. That is, a specific message identifier value may be reserved or set as a value for MTC group triggering. The terminal capable of receiving the broadcast message may receive and process the broadcast message including the message identifier (e.g., transmit it to the trigger application / function). The general terminal may ignore the broadcast message if it is a message for triggering. The group identifier or the terminal identifier may indicate a terminal or a group of terminals to which a broadcast message is to be received, and the terminal may ignore this if the group identifier or the terminal identifier does not specify itself.

Alternatively, the broadcast message for the trigger may use another data coding method. The general terminal can ignore the case of the message that does not currently use the standardized data coding method. The broadcast message for the trigger of the MTC terminal may be data coded using, for example, coding group bits left in the CBS data coding scheme of 3GPP TS23.038, and data coded in this manner. The message is ignored by the generic terminal and can only be interpreted by the MTC terminal. The broadcast message interpreted by the MTC terminal may include a group identifier or a terminal identifier. Thus, if the group identifier or the terminal identifier does not specify itself, the MTC terminal may ignore it. The distinguishing information of the MTC terminal capable of receiving the broadcast message for MTC device triggering and the general terminal which cannot be received may be included in the attribute information of the device, and may be changed by the mobile operator.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited thereto. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

CROSS-REFERENCE TO RELATED APPLICATIONCROSS-REFERENCE TO RELATED APPLICATION

This patent application claims priority pursuant to United States Patent Act section 119 (a) (35 USC § 119 (a)) with respect to patent application No. 10-2011-0102614, filed in Korea on October 7, 2011. All content is incorporated by reference in this patent application. In addition, if this patent application claims priority for the same reason for countries other than the United States, all its contents are incorporated into this patent application by reference.

Claims

An MTC server interface for receiving a trigger request message of a terminal from a machine type communication (MTC) server; And

And a trigger delivery interface for delivering a trigger message to a cell broadcast center (CBC) that provides a cell broadcast service (CBS) to a cell in which the terminal is located.
The method of claim 1,

The MTC server interface, characterized in that for receiving the fixed position information of the terminal MTC relay server.
The method of claim 2,

The MTC relay server MTC relay server, characterized in that for querying the cell information of the individual terminal configured in advance to the MTC relay server.
The method of claim 2,

The MTC relay server obtains a service node (SGSN / MME) from an HLR / HSS managing subscriber information and obtains cell information of an individual terminal from the service node.
The method of claim 1,

The MTC server interface MTC relay server, characterized in that for receiving the Mobile Subscriber Integrated Service Digital Network Number (MSISDN) of the terminal.
The method of claim 1,

MTC relay server, characterized in that the delivery of the trigger message to the CBC is selected if the number of terminals in a particular cell exceeds a certain number.
The method of claim 1,

The trigger request message MTC relay server, characterized in that it comprises at least one of validity time, MTC group identifier, trigger application ID, priority, MTC group location information, target application specific information.
The method of claim 1,

The trigger message MTC relay server, characterized in that it comprises at least one of a message identifier, a group identifier, a terminal identifier indicating whether the message for the triggering of the terminal.
The method of claim 1,

MTC relay server that can request triggering or MTC server information that can be triggered for a specific MTC group is pre-configured in the MTC relay server or MTC relay server, characterized in that via the HLR / HSS.
The method of claim 1,

The MTC relay server generates charging data including at least one of an identifier of the MTC server, an identifier of an MTC group, and an identifier of an individual terminal included in the group.
Receiving a trigger request message of a terminal from a machine type communication (MTC) server; And

And transmitting a trigger message to a cell broadcast center (CBC) that provides a cell broadcast service (CBS) to a cell in which the terminal is located.
The method of claim 11,

Receiving the trigger request message of the terminal, the trigger message relay method of the MTC relay server, characterized in that for receiving the fixed position information of the terminal.
The method of claim 12,

And querying cell information of an individual terminal configured in advance in the MTC relay server.
The method of claim 12,

Obtaining a service node (SGSN / MME) from the HLR / HSS managing the subscriber information, and obtaining the cell information of the individual terminal from the service node further comprising the trigger message relay method of the MTC relay server.
The method of claim 11,

Receiving the trigger request message of the terminal, the trigger message relay method of the MTC relay server, characterized in that for receiving the mobile subscriber integrated service digital network number (MSSISDN) of the terminal.
The method of claim 11,

The transmitting of the trigger message to the CBC is trigger message relay method of the MTC relay server, characterized in that is executed when the number of terminals in a specific cell exceeds a certain number.
The method of claim 11,

The trigger request message may include at least one of a valid time, an MTC group identifier, a trigger application ID, a priority, MTC group location information, and target application specific information.
The method of claim 11,

The trigger message relay method of the MTC relay server, characterized in that it comprises at least one of a message identifier, a group identifier, a terminal identifier indicating whether the message for the triggering of the terminal.
The method of claim 11,

Information of the MTC server that can request triggering or information of the MTC server that can be triggered for a specific MTC group is pre-configured in the MTC relay server or inquired through HLR / HSS, trigger message relay method of the MTC relay server .
The method of claim 11,

The MTC relay server further comprises the step of generating the charging data including at least one of the identifier of the MTC server, the identifier of the MTC group, the identifier of the individual terminals included in the group trigger message of the MTC relay server Relay method.