KR102166966B1 - Method and apparatus for sending state information of wireless terminal - Google Patents

Abstract

A status information transmission method is provided, and transmitting an ATM (AnyTime Modification) message based on the Regi message of the wireless terminal received from the wireless terminal to the Home Location Register (HLR), and ATM from HLR or IGW (INTEGRATED GATEWAY). When receiving a registration error response to the message, storing the registration error response, receiving a preset event of the wireless terminal, and transmitting an ATM message to the HLR based on the preset event.

Description

Method and apparatus for transmitting status information of a wireless terminal {METHOD AND APPARATUS FOR SENDING STATE INFORMATION OF WIRELESS TERMINAL}

The present invention relates to a method and apparatus for transmitting state information of a wireless terminal, and more particularly, to a method and apparatus for retransmitting state information when a predetermined condition for state information recovery is satisfied.

Recently, as the spread of wireless terminals (UEs) such as smart pads, tablet PCs, and smart phones is increasing, wireless terminals using data networks are increasing in order to receive better services than 3G.

At this time, the method of registering state information in the wireless terminal is performed by using the mobile station identification information. In this regard, Korean Patent Publication No. 2010-0047471 (published on May 10, 2010), which is a prior art, discloses a method of automatically retrying location registration by using mobile station identification information when location registration fails in a wireless terminal.

However, if the wireless terminal changes its status information, it can inform the HLR of its status information.If the delivery of status information of the wireless terminal fails in an abnormal situation such as an IGW failure, a status mismatch between the HLR and the TAS may occur. In this case, it may be impossible to make a normal call of the wireless terminal.

Korean Patent Laid-Open Publication No. 2010-0047471 (published on May 10, 2010) discloses a "processing method when a location registration fails in a mobile terminal".

According to an embodiment of the present invention, when the transmission of status information from the TAS to the HLR fails, the error response is stored as a flag, and the status change information of the wireless terminal is retransmitted under the condition that a preset event occurs, thereby distributing the timing of message retransmission. By doing so, it is possible to provide a status information transmission method that can prevent TAS overload and prevent unnecessary message retransmission of TAS. However, the technical problem to be achieved by the present embodiment is not limited to the technical problem as described above, and other technical problems may exist.

As a technical means for achieving the above-described technical problem, an embodiment of the present invention transmits an ATM (AnyTime Modification) message based on the Regi message of the wireless terminal received from the wireless terminal to a Home Location Register (HLR). When receiving a registration error response for an ATM message from HLR or IGW (INTEGRATED GATEWAY), storing the registration error response, receiving a preset event of the wireless terminal, and ATM based on a preset event And retransmitting the message to the HLR.

According to any one of the above-described problem solving means of the present invention, it is possible to prevent overload of the TAS by distributing the timing of message retransmissions and prevent unnecessary message retransmission of the TAS.

1 is a configuration diagram illustrating a data network system according to an embodiment of the present invention.
2 is a block diagram illustrating an apparatus for transmitting status information of a wireless terminal according to an embodiment of the present invention.
FIG. 3 is a diagram showing a process of transmitting and receiving data between components included in the data network system of FIG. 1 according to an embodiment of the present invention.
FIG. 4 is a diagram illustrating a process of transmitting and receiving data between components included in the data network system of FIG. 1 according to another embodiment of the present invention.
5 is a flowchart illustrating a method of transmitting status information according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art can easily implement the present invention. However, the present invention may be implemented in various different forms and is not limited to the embodiments described herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and similar reference numerals are assigned to similar parts throughout the specification.

Throughout the specification, when a part is said to be "connected" to another part, this includes not only "directly connected" but also "electrically connected" with another element interposed therebetween. . In addition, when a part "includes" a certain component, it means that other components may be further included, and one or more other features, not excluding other components, unless specifically stated to the contrary. It is to be understood that it does not preclude the presence or addition of any number, step, action, component, part, or combination thereof.

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

1 is a configuration diagram illustrating a data network system according to an embodiment of the present invention. Referring to Figure 1, the data network system 1 is UE (User Equipment, 100), eNB (Evolved Node B, 200), SGW (Serving Gateway, 300), MME (Mobility Management Entity, 310), HLR (Home Location Register, 330), IGW (Integrated Gateway, 350), PGW (PDN Gateway, 400), CSCF (Call Session Control Function, 500), TAS (Telephony Application Server, 600), PCRF (Policy and Charging Rules Function, 700) ), SPR (Subscriber Profile Repository, 810), OFCS (Offline Charging System, 820), OCS (Online Charging System, 830), and PDN (Public Data Network, 900). However, since the data network system 1 of FIG. 1 is only an embodiment of the present invention, the present invention is not limitedly interpreted through FIG. 1.

The UE 100 may be a user terminal. In this case, the UE 100 may be implemented as a terminal capable of accessing a remote server or terminal. The UE 100 is, for example, a wireless communication device that guarantees portability and mobility, and all kinds of devices such as a smartphone, a smart pad, a tablet PC, etc. that can be connected to the PDN 900 It may include a handheld-based wireless communication device.

The eNB 200 may be an LTE base station, and may be a device that provides a wireless connection between the UE 100 and an LTE network. That is, the eNB 200 may connect between the SGW 300 and the UE 100 and manage handover of the UE 100. At this time, the eNB 200 and the UE 100 may be wirelessly connected.

The SGW 300 may control the movement of the UE 100 between 3GPP/E-UTRAN and may perform anchoring during handover of the eNB 200 to the UE 100. For example, when the UE 100 is handed over from one eNB 200 to another eNB 200, handover of the UE 100 may occur around the SGW 300. Accordingly, the SGW 300 may operate as an anchor point in intra-LTE mobility.

The MME 310 may control a signal between the eNB 200 and the SGW 300, determine routing, and may authenticate the UE 100. In this case, the authentication protocol of the MME 310 may be EPS-AKA, and key information for authenticating the UE 100 may be stored in the HLR 330. Accordingly, the MME 310 may receive key information from the HLR 330 and perform authentication for the UE 100. In addition, the MME 310 may manage the EPS bearer. In this case, the EPS bearer is, for example, a logical tunnel created between the UE 100 and the PGW 400 (UE (100)-eNB (200)-SGW (300)-PGW (400))). However, the MME 310 may control the creation, change, and release of the tunnel. In addition, not only one EPS bearer is generated per UE 100, but a plurality of EPS bearers may be generated according to service characteristics, and various types of traffic, that is, IP flows, may exist in the EPS bearer. And, the MME 310 can manage the mobility state of the subscriber. For example, whether the UE 100 is currently connected to the data network system 1, or if it is connected, whether or not the Internet is used or You can manage the Idle State.

The HLR 330 may be a central database of an LTE network that holds key information for authentication, subscriber profile, and subscriber location information for each UE 100. In this case, the subscriber profile may include information on quality of service (QoS) grade information suitable for a service product subscribed to by each subscriber, for example, priority, maximum usable bandwidth, and the like.

The IGW 350 may be a gateway for connecting the HLR 330 and the TAS 600. In this case, when the IGW 350 fails to provide a connection function due to a failure or the like, a state mismatch between the HLR 330 and the TAS 600 may occur, and thus the UE 100 may not be able to make a normal call.

The PGW 400 may allocate an IP address to the UE 100. In this case, the IP address may be allocated through the UE 100 access procedure specified by 3GPP, not the DHCP protocol. In addition, the PGW 400 may perform anchoring on the SGW 300. For example, when the UE 100 changes from one SGW 300 to another SGW 300 while moving, the PGW 400 may serve as an anchoring point. In addition, the PGW 400 may apply different QoS policies for each UE 100 and may manage accounting data for each UE 100. In this case, the accounting data may be, for example, an amount of uplink and downlink traffic, an access time, and the like, and the PGW 400 may transmit the accounting data to the OFCS 820 in the form of a charging data record (CDR). Accordingly, it is possible to know a log of when each subscriber has accessed, how much data, and how much access has been made through the accounting data, and the PGW 400 can generate and manage all of them and transmit them to the OFCS 820. In addition, the PGW 400 may receive a policy and billing for the UE 100 from the PCRF 700.

The CSCF 500 is a function that is in charge of a part related to call processing, and is composed of Incoming CAll GateWay (ICGW), CAll Control Function (CCF), Serving Profile Database (SPD), and Address Handling (AH). ICGW acts as the first entry point and performs routing for input calls. It also performs service service triggering for input calls such as call screening and forwarding, and is responsible for querying AH and communicating with HSS. CCF is responsible for call setup and termination, status/event management, interaction with MRF (Multimedia Resource Function) for multi-party service, call event reporting for billing, and application level registration reception and processing. The SPD communicates with the HSS of the home domain to manage user profile information and performs a function similar to that of the existing network VLR, which informs the home domain when the user first accesses. AH analyzes, converts, and corrects addresses and provides address portability.

At this time, since the CSCF 500 functions differently depending on the network in which the UE 100 is located, P-CSCF (Proxy CSCF), I-CSCF (Interrogating CSCF), and S-CSCF are based on their location and role. It can be classified as (Serving CSCF). First, the P-CSCF serves as an initial access point for the UE 100 to access an IP Multimedia Subsystem (IMS), and may exist in the same domain as the Gateway GPRS Support Node (GGSN). In addition, the P-CSCF can generate a change data record (CDR), verify rights of bearer resources, and manage quality of service (QoS). Second, the I-CSCF is the first point point at which the UE 100 accesses the network, and a plurality of I-CSCFs may exist in one network domain. When transferring messages between different domains, I-CSCF may not send part of the network information by performing the firewall function's Topology Hiding Inter-Network Gateway (THIG). Third, the S-CSCF may perform a service that manages and controls the session state of the actually registered UE 100, and may provide information related to service resources to the UE 100.

The TAS 600 may be a server that processes a call. In addition, the TAS 600 includes a subscriber database and an interworking interface, and may perform billing and OAM (Operation, Administration, and Maintenance) functions. In this case, the call processing function may be a function of processing additional service operations such as group video calls and overall call processing, and changing a message field for call processing. The charging function may be a function for charging to the UE 100. The subscriber database can store information about the subscriber's supplementary service status and registration (Regi) status, and the interworking interface handles interworking with various nodes to perform CSCF (500), HLR (330) and additional services. I can. OAM can handle operation, management and maintenance.

The PCRF 700 may be a device that determines a policy and a billing rule for each UE 100. At this time, the policy may be QoS information to be used by the UE 100, and the billing may be information on whether to perform offline charging or online charging. These information may be transferred from the PCRF 700 to the PGW 400, and the PGW 400 may perform control (QoS, charging) for the UE 100 based on the information received from the PCRF 700. have.

The SPR 810 may store a policy and charging rule for each UE 100. Accordingly, the PCRF 700 may obtain information about the UE 100 from the SPR 810.

The OFCS 820 may receive the CDR transmitted by the PGW 400 and manage it centrally.

When the UE 100 uses a prepaid, the OCS 830 may centrally manage the remaining amount of usage (Balance or Credit) for real-time usage for each UE 100. Here, real-time usage can be managed by the PGW 400 and the remaining usage can be delivered to the OCS 830. In this case, the OCS 830 may inform the PGW 400 of the corresponding information so that the service is no longer available for the UE 100 that has used up all the remaining usage.

The PDN 900 is a public data network, and may be, for example, an Internet or an IP network.

A method of synchronizing data session information occurring in a data network system according to an embodiment of the present invention will be described as an example.

Recently, as the spread of wireless terminals (UEs) such as smart pads, tablet PCs, and smart phones is increasing, wireless terminals using data networks are increasing in order to receive better services than 3G.

In this case, when the state information of the wireless terminal changes, the wireless terminal may inform the HLR of the state information of itself. Here, when the transmission of state information of the wireless terminal fails in an abnormal situation such as an IGW failure, a state mismatch between the HLR and the TAS may occur, and thus, a normal call of the wireless terminal may be impossible.

Accordingly, the state information transmission method according to an embodiment of the present invention stores the error response as a flag when the transmission of the state information from the TAS to the HLR fails, and the state change information of the wireless terminal is stored on the condition that a preset event occurs. By retransmitting, the timing of message retransmission can be distributed to prevent TAS overload and unnecessary message retransmission by TAS can be prevented.

2 is a block diagram illustrating an apparatus for transmitting status information of a wireless terminal according to an embodiment of the present invention. In this case, the apparatus for transmitting status information of the wireless terminal may be implemented with the TAS of FIG. 1, or may be driven by other devices. In FIG. 2, an embodiment in which an apparatus for transmitting state information of a wireless terminal according to an embodiment of the present invention is implemented as a TAS is described.

Referring to FIG. 2, the TAS 600 according to an embodiment of the present invention includes a first transmission unit 610, a storage unit 630, a reception unit 650, and a second transmission unit 670. can do. In this case, the UE 100 of FIG. 1 is defined as a wireless terminal 100.

The first transmission unit 610 transmits an ATM (AnyTime Modification) message based on the first event received from the wireless terminal 100 to the HLR 330. In this case, the first event may be a register message for registering state change data of the wireless terminal 100 to the HLR 330. For example, when state information such as power-on or a change in its own location is changed, the wireless terminal 100 transmits data indicating that its own state has changed to the HLR 330. At this time, the TAS 600 and the HLR 330 can register and store the state change information of the wireless terminal 100, and send the state change information to themselves as a register message, a signal indicating that the reception operation has been successfully completed, For example, a signal such as 200 OK may be transmitted together with an ACK signal.

When receiving the registration error response for the ATM message from the HLR 330, the storage unit 630 stores the received registration error response. In this case, the registration error response may be managed as a flag, and the registration error response may correspond to the error response. In this case, the registration error response may occur when the IGW 350 connecting the HLR 330 and the TAS 600 does not operate normally.

The receiver 650 receives a first event of the wireless terminal 100 or a second event for an outgoing call. In this case, the second event may be an invite message corresponding to an outgoing call to the destination terminal of the wireless terminal 100.

The second transmission unit 670 transmits the ATM message to the HLR 330 based on the first event or the second event. That is, when a message (re-Regi) for re-registering state change information is received from the wireless terminal 100, or when an outgoing call from the wireless terminal 100 comes up to the TAS 600, the ATM message is transmitted to the HLR 330. Can be retransmitted to.

Matters that are not described with respect to the state information transmission method of FIG. 2 are the same as those described above with respect to the state information transmission method through FIG. 1 or can be easily inferred from the descriptions, so a description thereof will be omitted.

3 is a diagram showing a process of transmitting and receiving data between components included in the data network system of FIG. 1 according to an embodiment of the present invention, and FIG. 4 is a diagram illustrating the data of FIG. 1 according to another embodiment of the present invention. A diagram showing a process of transmitting and receiving data between components included in a network system. Hereinafter, an example of a process in which data is transmitted/received between components will be described with reference to FIGS. 3 and 4, but the present application is not limitedly interpreted as such an embodiment, and FIG. 3 according to various embodiments described above. And it is obvious to those skilled in the art that the process of transmitting and receiving data shown in FIG. 4 may be changed.

Referring to FIG. 3, when the UE 100 transmits a message (Regi) for registering status information to the CSCF 500 (S3110), the CSCF 500 responds that the message has been well received (200 OK). Is transmitted to the UE 100 (S3120). Similarly, when the CSCF 500 transmits a message (Regi) for registering the state information of the wireless terminal 100 to the TAS 600 (S3210), the TAS 600 stores the state change data, and The response is transmitted to the CSCF 500 (S3230).

TAS (600) transmits an ATM message to HLR (330) via IGW (350) (S3300). At this time, when connection with HLR (330) is impossible (S3400), IGW (350) responds to a registration error ( 3500) is transmitted to the TAS 600 (S3500). Here, the TAS 600 manages the registration error response as a flag.

At this time, the state information transmission method according to an embodiment of the present invention is when transmitting a message informing the state change information from the UE 100 to the TAS 600 via the CSCF 500 (S3710 to S3910), TAS (600) transmits the ATM message to the HLR (330) (S3920).

On the other hand, the state information transmission method according to another embodiment of the present invention, referring to FIG. 4, when the UE 100 raises an outgoing call (Invite) to the called terminal to the TAS 600 (S4700 to S4800), The TAS 600 transmits the ATM message to the HLR 330 (S4900). Here, since the steps S4110 to S4600 of FIG. 4 correspond to the steps of S3110 to S3600 of FIG. 3, duplicate descriptions will be omitted.

Matters that are not described with respect to the method of transmitting the state information of FIGS. 3 and 4 are the same as those described for the method of transmitting the state information of FIGS. 1 and 2 or can be easily inferred from the description. It should be omitted.

The order between the above-described steps (S3110 to S3920 and S4110 to S4900) is only an example and is not limited thereto. That is, the order of the above-described steps (S3110 to S3920 and S4110 to S4900) may be mutually changed, and some of the steps may be executed or deleted at the same time.

5 is a flowchart illustrating a method of transmitting status information according to an embodiment of the present invention. Referring to FIG. 5, the TAS transmits an ATM (AnyTime Modification) message based on the Regi message of the wireless terminal received from the wireless terminal to the Home Location Register (HLR) (S5100).

Then, when the TAS receives a registration error response for an ATM message from HLR or IGW (INTEGRATED GATEWAY), the TAS stores the registration error response (S5200).

Then, the TAS receives a preset event of the wireless terminal (S5300), and retransmits the ATM message to the HLR based on the first event or the second event (S5400).

Matters not described with respect to the state information transmission method of FIG. 5 are the same as those described for the state information transmission method through FIGS. 1 to 4 or can be easily inferred from the description, so the description will be omitted below. .

The method for transmitting status information according to the exemplary embodiment described with reference to FIG. 5 may also be implemented in the form of a recording medium including instructions executable by a computer such as an application executed by a computer or a program module. Computer-readable media can be any available media that can be accessed by a computer, and includes both volatile and nonvolatile media, removable and non-removable media. Further, the computer-readable medium may include both computer storage media and communication media. Computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data. Communication media typically includes computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave, or other transmission mechanism, and includes any information delivery medium.

The above description of the present invention is for illustrative purposes only, and those of ordinary skill in the art to which the present invention pertains will be able to understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not limiting. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as being distributed may also be implemented in a combined form.

The scope of the present invention is indicated by the claims to be described later rather than the detailed description, and all changes or modified forms derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present invention. do.

Claims (5)

In the method of transmitting state information of a wireless terminal, performed by a state information transmitting device,
Transmitting an AnyTime Modification (ATM) message based on a message including state change information of the wireless terminal received from the wireless terminal to a Home Location Register (HLR) via an integrated gateway (IGW);
Receiving, from the HLR or the IGW, an error response of registration of the state change information to the HLR in response to the transmission of the ATM message;
Storing the received error response;
Receiving a preset event of the wireless terminal; And
Retransmitting the ATM message to the HLR via the IGW upon receiving the error response and the preset event
Containing, the method of transmitting state information of the wireless terminal.
The method of claim 1,
The preset event may include a first event, which is a register message for registering state change data of the wireless terminal to the HLR; or
The second event, which is an invite message corresponding to an outgoing call to the destination terminal of the wireless terminal
That includes, the method of transmitting state information of the wireless terminal.
The method of claim 1,
The registration error response to the ATM message is managed by a flag (Flag), the state information transmission method of the wireless terminal.
A first transmission unit for transmitting an ATM (AnyTime Modification) message based on a message including state change information of the wireless terminal received from the wireless terminal to a Home Location Register (HLR) via an integrated gateway (IGW);
Receiving, from the HLR or the IGW, an error response of registration of the state change information to the HLR in response to the transmission of the ATM message;
A storage unit for storing the received error response;
A receiver configured to receive a preset event of the wireless terminal; And
A second transmission unit for transmitting the ATM message to the HLR via the IGW upon receiving the error response and the preset event
Containing, the state information transmission apparatus of the wireless terminal.
The method of claim 4,
The preset event may include a first event, which is a register message for registering state change data of the wireless terminal to the HLR; or
The second event, which is an invite message corresponding to an outgoing call to the destination terminal of the wireless terminal
That includes, the state information transmission apparatus of the wireless terminal.

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