KR20150039985A - Apparatus for delivering subscriber information in wireless communication system and method thereof - Google Patents

Abstract

The present invention relates to an apparatus and a method for transmitting subscription information in a wireless communication system. According to the present invention, a source eNB provides particular service subscription information to a target eNB when UE performs handover, and the target eNB questions a mobility management entity (MME) on whether the target eNB can provide a particular service. The MME receiving the question confirms whether the target eNB can provide the particular service to the UE through a cell group service level and the particular service subscription information stored in the MME. The MME provides particular service support information to the target eNB when the UE is subscribed to the particular service, and the target eNB is set to provide the particular service. Then, the target eNB sets context in accordance with the particular service support information, and provides the particular service to the UE. In addition, the MME notifies an SGW and a PGW of which the target eNB provides the particular service to the UE. According to the present invention, the performance of the entire system can be improved since questioning whether UE is subscribed to an HSS is not required, and thereby the traffic with regard to the HSS is reduced. Furthermore, the MME notifies the SGW and the PGW of which the target eNB provides the particular service to the UE.

Description

[0001] Apparatus for delivering subscription information in a wireless communication system and method therefor [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to wireless communication technology, and more particularly, to an apparatus and method for transmitting subscription information in a wireless communication system.

In addition to LTE-A, LTE-A and Evolved High-Speed Packet Access (HSPA +), which are LTE-A (LTE advanced) . LTE is based on Release 8, a wireless high-speed data packet access standard established by the 3rd Generation Partnership Project (3GPP) in December 2008, and is aimed at 4G wireless technology (4G) designed to increase network capacity and speed. It is the technology of all stages. LTE is an all-IP-based network that provides differentiated QoS (Quality of Service) for real-time and non-real-time services and can provide efficiency of network resources and also introduces smart antenna technology (MIMO) It extends the bandwidth for wireless communications, supporting speeds up to 12 times faster than HSDPA. LTE-A is defined as improving the above-described LTE to provide a maximum transmission rate of 1 Gbps down and 500 Mbps upstream. This LTE-A provides higher data throughput than LTE through Carrier Aggregation (CA) and Coordinate Muti-Point (CoMP) technologies not supported by LTE. Here, CA is a technique of using frequency bands expanded by using different frequency bands at the same time, and CoMP is a technique for increasing throughput at a cell boundary through interference control by cooperation between neighboring base stations. Accordingly, in the current mobile communication system, two or more mobile communication services according to different standards such as LTE and LTE-Advanced are mixed and supported.

Korean Patent Publication No. 2011-0121547, published on Nov. 07, 2011 (Name: Apparatus and method for supporting gateway node reselection in a communication system)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a wireless communication system capable of providing a specific service and a normal service in a wireless communication system and to provide subscription information capable of providing information related to a service And a method for the same.

According to an aspect of the present invention, there is provided a mobility management server for transferring subscription information, the mobility management server comprising: a target base station receiving a specific service subscription information from a source base station, The service providing apparatus comprising: an interface unit configured to receive a route change request message including a query as to whether a specific service can be provided to the user apparatus; And a control unit for transmitting a path change request confirmation message including support information to the target BS through the interface unit.

According to an aspect of the present invention, there is provided a target BS for transmitting subscription information according to the present invention includes an interface module for receiving specific service subscription information of the user equipment from a source BS, Upon receipt of the specific service subscription information, inquires of the mobility management server via the interface module whether or not a specific service can be provided to the user device, and upon receipt of specific service support information from the mobility management server, And a control module for setting the context so that the specific service is provided.

According to another aspect of the present invention, there is provided a method of transmitting a subscription information of a mobility management server, the method comprising: querying whether a specific service can be provided to the user equipment from a target base station, Determining whether or not the specific service can be provided according to the query; and if the specific service can be provided according to the determination, setting a context according to the specific service And transmitting a path change request confirmation message including specific service support information to the target base station.

According to another aspect of the present invention, there is provided a method of transmitting subscription information of a target BS, the method comprising the steps of: receiving, at a handover of a user equipment, The method comprising: querying a mobility management server as to whether or not a specific service can be provided to the user equipment in response to receiving the specific service subscription information; and receiving specific service support information from the mobility management server according to the query, And setting the context to be provided.

According to the present invention, when a user equipment subscribed to a specific service moves from a source base station to a target base station, the mobility management server (MME) confirms whether the target base station can provide a specific service to the user equipment, HSS). Accordingly, the traffic to the home subscriber server is reduced, and the performance of the entire system can be improved. In addition, the mobility management server informs the serving gateway and the packet gateway that the target base station is providing specific services to the user equipment. As a result, it can be utilized as information for charging for a specific service.

1 is a diagram for explaining a schematic configuration of a wireless communication system according to an embodiment of the present invention.
2 is a block diagram for explaining a schematic internal configuration of a mobility management server according to an embodiment of the present invention.
3 is a block diagram illustrating a schematic internal structure of a base station according to an embodiment of the present invention.
4 is a flowchart illustrating an initial connection procedure of a user apparatus according to an embodiment of the present invention.
5 is a flowchart illustrating a method for transferring subscription information in a handover according to an embodiment of the present invention.
6 is a flowchart illustrating a method for transferring subscription information of a mobility management server according to an embodiment of the present invention.
7 is a flowchart illustrating a method for transmitting subscription information of a base station according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Note that, in the drawings, the same components are denoted by the same reference symbols as possible. Further, the detailed description of known functions and configurations that may obscure the gist of the present invention will be omitted. For the same reason, some of the components in the drawings are exaggerated, omitted, or schematically illustrated.

1 is a diagram for explaining a schematic configuration of a wireless communication system according to an embodiment of the present invention.

1, a wireless communication system according to an embodiment of the present invention includes a base station (eNodeB, hereinafter referred to as "eNB") 100, a mobility management entity (hereinafter, referred to as "MME" (SGS) 300, a packet data network gateway (PGW) 400, a home subscriber server (HSS) 500, and a subscriber policy management server Control and Charging Rules Function (hereinafter, " PCRF ", 600).

The above-mentioned system is referred to as EPS (Evolved Packet System), and EPS is an EPC (Evolved Packet Core) which is an IP based packet switched core network and an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) And a radio access network (RAN). Here, the EPC includes the MME 200, the SGW 300, the PGW 400, and the HSS 500.

Each of the entities according to the above-described embodiment of the present invention will be described.

The MME 200 includes an access to network connection, network resource allocation, tracking, paging, roaming and handover of a user equipment (UE) 10 It is an element that performs signaling and control functions to support. The MME 200 controls control plane functions related to subscriber and session management. The MME 200 manages a plurality of eNBs 100 and performs signaling for selection of a conventional gateway for handover to another 2G / 3G network. The MME 200 also performs functions such as security procedures, terminal-to-network session handling, and idle terminal location management.

The SGW 300 is an element that functions as a boundary point between a radio access network (RAN) and a core network and functions to maintain a data path between the eNB 100 and the PGW 400. [ In addition, when the UE 10 moves (e.g., handover, etc.) over an area served by the eNB 100, the SGW 300 may serve as an anchor point of the movement. That is, the packets can be routed through the SGW 300 for mobility in the E-UTRAN. In addition, the SGW 300 may be connected to another 3GPP network (RAN defined before 3GPP Release-8, e.g., UTRAN or GERAN (Enhanced Data Rates for Global Evolution) As shown in FIG.

The PGW 400 corresponds to the termination point of the data interface towards the packet data network. The PGW 400 may include policy enforcement features, packet filtering, charging support, lawful interception, UE IP allocation, packet screening, etc. (3GPP) network and a non-3GPP network (e.g., an untrusted network such as an Interworking Wireless Local Area Network (I-WLAN), a Code Division Multiple Access (CDMA) The same trusted network) as the anchor point for mobility management.

The HSS 500 manages user subscription information (or subscription data or subscription records) and location information.

The PCRF 600 manages a policy to be applied to the UE 10, a quality of service (QoS), and the like. The PCC (Policy and Charging Control) rules generated in the PCRF are transmitted to the PGW 400.

The wireless communication system according to the embodiment of the present invention can provide a specific service and a normal service. Here, it is assumed that the specific service is, for example, an LTE-Advanced (hereinafter, LTE-A) service and the normal service is an LTE service. For example, the specific service includes CA (Carrier Aggregation) and Coord (Coordinate Multi-Point) functions.

In order to receive a specific service, the UE 10 must be subscribed to a specific service, and the eNB 100 should be set to be able to provide a specific service separately from whether the eNB 100 is capable of providing the specific service or not do.

According to the embodiment of the present invention, the MME 200 receives specific service subscription information from the HSS 500 indicating that the UE 10 is subscribed to a specific service at the initial connection of the UE 10, 10). ≪ / RTI > In addition, the MME 200 stores a cell group service level in which a service level for a plurality of eNBs 100 connected to the MME 200 is set. The cell group service level is set to a service level that enables or disables a specific service for each eNB 100. This service level setting can be made according to the policy of the operator.

If the UE 10 is subscribed to a specific service and the cell camped by the UE 10, that is, the eNB 100 is set to be able to provide a specific service according to the cell group service level, And provides specific service support information to the eNB 100. The specific service support information may include information necessary for setting a context for a specific service. Therefore, the eNB 100 sets the context for the UE 10 based on the received specific service support information. This means that the eNB 100 has set a context corresponding to a specific service for the UE 10, which means that the eNB 100 can provide a specific service to the UE 10. [ However, even if the UE 10 is subscribed to a specific service, the MME 200 is configured such that the cell camped by the UE 10, that is, the eNB 100 is set to not provide a specific service according to the cell group service level Cell, information for providing a normal service is provided without providing specific service support information, so that the eNB 100 provides a normal service.

In order to continuously provide a specific service, every time the UE 10 moves, it is determined whether the UE 10 is a subscriber to the service, and whether the eNB 100 camped by the UE 10 provides a specific service It should be determined. According to the 3GPP standard, only the system capable of providing each of the LTE and LTE-A services is specified, and a system capable of providing all the services at the same time is not considered.

Thus, as shown, when the UE 10 performs a handover, the source eNB 101 provides specific service subscription information stored in the context to the target eNB 102. The target eNB 102 then queries the MME 200 as to whether it can provide a particular service. The MME 200 receiving this query can confirm that the UE 10 is subscribed to a specific service through the context of the UE 10 including the specific service subscription information of the UE 10 stored therein . In addition, the MME 200 can confirm whether the target eNB 102 is set to provide a specific service through the cell group service level stored therein.

If the UE 10 is subscribed to a particular service and the target eNB 102 is set to provide a particular service, the MME 200 provides specific service support information to the target eNB 102. Then, the target eNB 102 establishes a context according to the specific service support information and provides the UE 10 with a specific service. The MME 200 also informs the SGW 300 and the PGW 400 that the target eNB 102 is providing the UE 10 with a specific service.

As described above, according to the movement of the UE 10, it is not necessary for the MME 200 to inquire whether or not to join the specific service of the UE 10 to the HSS 500 by determining whether a specific service is provided, . Thus, the performance of the entire system can be improved.

2 is a block diagram for explaining a schematic internal configuration of a mobility management server according to an embodiment of the present invention.

Referring to FIG. 2, the MME 200 includes an interface unit 210, a storage unit 220, and a control unit 230.

The interface unit 210 communicates with the eNB 100, the SGW 300, and the HSS 500 through different interfaces. The interface unit 210 transmits a message input from the control unit 230 to the eNB 100, the SGW 300 and the HSS 500 via the corresponding interface and transmits the message to the eNB 100, the SGW 300, the HSS 500, And transmits the message to the control unit 230.

The storage unit 220 is for storing data and may store various kinds of data according to an embodiment of the present invention. For example, the storage unit 220 may store a Globally Unique Temporary Identifier (GUTI), location information, context, etc., allocated to the UE 10 served by the UE. In the initial access procedure of the UE 10, the service profile of the UE 10 is received from the HSS 500, and when the UE 10 is subscribed to a specific service, And stores specific service subscription information, which is information on a specific service, in a context. In addition, the storage unit 220 stores a cell group service level in which service levels for a plurality of eNBs 100 are set. The cell group service level is set to a service level that enables or disables a specific service for each eNB 100. This service level setting can be made according to the policy of the operator.

The control unit 230 may control the overall operation of the MME 200 and the signal flow between the internal blocks of the MME 200 and may perform a data processing function for processing the data. The controller 230 may be a processor such as a central processing unit (CPU).

In accordance with an embodiment of the present invention, when the UE 10 handover from the source eNB 101 to the target eNB 102, the source eNB 101 transmits the specific service subscription information < RTI ID = 0.0 > . The target eNB 102 receiving the specific service subscription information queries the MME 200 whether it can provide the UE 10 with a specific service. Such a query is made through a Path Switch Request message including extension parameters.

Accordingly, upon receiving the Path Switch Request message including the extended parameters through the interface unit 210, the control unit 230 determines whether the UE 10 can provide a specific service. In order to provide a specific service to the UE 10, the UE 10 must be subscribed to the specific service and the target eNB 102 must be set to be able to provide the specific service. The control unit 230 can confirm whether the UE 10 is subscribed to a specific service based on the specific service subscription information of the context stored in the storage unit 220. In addition, the control unit 230 can determine whether the target eNB 102 can provide a specific service from the cell group service level stored in the storage unit 220. [

If it is confirmed that the UE 10 can provide a specific service, the control unit 230 can know that the target eNB 102 can provide the UE with a specific service. The control unit 230 can know that the target eNB 102 should set a context corresponding to a specific service in order to provide the UE with a specific service. Accordingly, the controller 230 performs the following two operations.

First, the control unit 230 transmits a specific service provision report so that the SGW 300 and the PGW 400 can receive the specific service provision report. The specific service provision report indicates that the target eNB 102 establishes a context corresponding to the specific service and provides the UE 10 with a specific service. Accordingly, the SGW 300 and the PGW 400 receiving the specific service provision report can recognize that the target eNB 102 provides the UE 10 with a specific service. Accordingly, the PGW 400 is an integrated billing system that stores a cell identifier (ECGI) of the target eNB 102 and a specific service provision report and collects information for billing, and a specific service is provided to the UE 10 . This specific service provision report is included in the extended field of the Create Session Request message and is transmitted to the SGW 300. The SGW 300 is included in the extended field of the Modify Bearer Request message to transmit the PGW (400).

Second, the control unit 230 transmits specific service support information to the target eNB 102 so that the target eNB 102 can provide a specific service to the UE 10. Therefore, the target eNB 102 can set a context based on the specific service support information, and can provide a specific service to the UE 10 according to the set context.

3 is a block diagram illustrating a schematic internal structure of a base station according to an embodiment of the present invention.

Referring to FIG. 3, the eNB 100 includes an interface module 110, a communication module 120, a storage module 130, and a control module 140.

The interface module 110 is for communicating with other eNB 100, MME 200, PGW 400, and the like. The interface module 110 communicates with the other eNB 100 using the X2 interface, communicates with the MME 200 using the S1-MME interface, and communicates with the SGW 300 using the S1-U interface.

The communication module 120 performs communication with the UE 10 through the radio section. To this end, the communication module 120 may include a transmitter for up-converting and amplifying the frequency of a transmitted signal, a receiver for low-noise amplifying (LNA) the received signal, and down-converting the frequency. The communication module 120 may receive a signal through a wireless channel, output the signal to the control module 140, and transmit the signal output from the control module 140 through a wireless channel.

The storage module 130 is for storing data and may store various kinds of data according to an embodiment of the present invention. For example, the storage module 130 stores the context of the UE 10. The context of this UE 10 may include the specific service subscription information of the UE 10.

The control module 140 may control the overall operation of the eNB 100 and the signal flow between the internal blocks of the eNB 100 and may perform a data processing function for processing the data. The control module 140 may be a processor such as a central processing unit (CPU).

When the eNB 100 is the source eNB 101 at the time of handover of the UE 10, the control module 140 delivers the specific service subscription information to the target eNB 102 via the interface module 110.

The control module 140 may receive specific service subscription information from the source eNB 101 via the interface module 110 when the eNB 100 is the target eNB 102 at the time of handover of the UE 10 . The control module 140 receiving the specific service subscription information informs the MME 200 of the receipt of the specific service subscription information from the source eNB 101 and inquires whether the UE 10 can provide a specific service do. To this end, the control module 140 transmits a Path Switch Request message including an extension parameter to the MME 200 through the interface module 110. If it is determined that the UE 10 can provide a specific service, the MME 200 includes specific service support information so that the target eNB 102 sets a context corresponding to the specific service for the UE 10 (Path Switch Request Ack) message to the target eNB 102. Accordingly, when the path switch request acknowledgment message including the specific service support information is received, the control module 140 of the target eNB 102 generates a context corresponding to the specific service based on the received specific service support information And provides the UE 10 with a function corresponding to a specific service. For example, when a specific service is LTE-A, such a function may be CA (Carrier Aggregation), Coordinated Multi-Point (CoMP), or the like.

4 is a flowchart illustrating an initial connection procedure of a user apparatus according to an embodiment of the present invention.

First, the MME 200 according to the present invention acquires specific service subscription information for the UE 10 at the time of registering the initial location of the UE 10, and stores the subscription information in a user context (UE context).

Referring to FIG. 4, when the UE 10 is powered on, it starts an initial access procedure for first accessing a mobile communication network. For initial connection, the UE 10 selects one of the plurality of eNBs 100 and connects the radio section with the selected eNB 100 in step S110 (RRC Connection Establishment).

At this time, the UE 10 transmits an Attach Request message requesting an initial connection in step S115, and the connection request message is transmitted to the MME 200 via the eNB 100. [ The connection request message includes identification information and capability information of the UE 10. Here, the identification information may be an International Mobile Subscriber Identity (IMSI), a Globally Unique Temporary Identifier (GUTI), or an International Mobile Equipment Identity (IMEI), and may be an IMSI.

The MME 200 receiving the connection request message of the UE 10 proceeds with subscriber authentication and security setup for the UE 10 in step S120. The MME 200 obtains an authentication vector from the HSS 500 through the IMSI of the UE 10 and transmits a part of the authentication vector obtained from the HSS 500 to the UE 10 in step S120. . Then, the MME 200 and the UE 10 complete mutual authentication and security setting.

When the authentication and security setting procedure is completed, the MME 200 registers the UE 10 and confirms what services the UE 10 can use. To this end, the MME 200 must inform the HSS 500 that the UE 10 is connected to the MME 200 itself and is located in an area managed by the MME 200 itself. That is, the MME 200 transmits an Update Location Request message to the HSS 500 in step S125. The Update Location Request message includes an MME Identifier (MME ID) and a UE Identifier (IMSI).

The HSS 500 having received the Update Location Request message registers the location of the UE 10 in the MME 200 by mapping and storing the MME 200 identifier and the UE identifier.

The HSS 500 then extracts the service profile of the UE 10 and transmits an Update Location Answer message including the service profile to the MME 200 in step S130. A service profile is information indicating a service to which a user (or UE) subscribes. That is, the service profile includes specific service subscription information which is information on the specific service if the UE 10 is subscribed to a specific service (e.g., LTE-A). For example, the specific service subscription information includes an APN (Access Point Name) for a specific service subscribed by the user, identification information of the PGW 400 for accessing the APN, subscribed QoS profile information (UE-AMBR, QCI, ARP, APN-AMBR (UL / DL), etc.). The specific service subscription information may include a service identifier capable of distinguishing a specific service from other services.

The MME 200 stores the service profile received from the HSS 500 as a context in step S135 and indicates that the UE 10 is subscribed to a specific service in the context of the UE 10. [ Specific service subscription information is also stored.

As described above, after completing the location registration, the MME 200 establishes an EPS session allocated to the UE 10 in step S140 (EPS Session Establishment). That is, the MME 200 transmits a Create Session Request message to the SGW 300, and the SGW 300 transmits the session creation request message to the PGW 400. Accordingly, the PGW 400 transmits a Create Session Response message to the SGW 300, and the SGW 300 transmits the session response message to the MME 200. Accordingly, a bearer between the SGW 300 and the PGW 400 assigned to the UE 10 is generated.

The MME 200 must transmit an Attach Accept message in response to the received Attach Request message (S115). This connection acknowledgment message is for informing that the connection request has been successfully made and will be transmitted to the UE 10 via the eNB 100. [

The MME 200 transmits an Initial Context Setup Request message to the eNB 100 in step S145 so as to perform a procedure for controlling the eNB 100 to allocate radio resources to the UE 10 . If the UE 10 is subscribed to a specific service according to the specific service subscription information and the target eNB 102 is set to be able to provide a specific service according to the cell group service level, And information for setting the context of the UE 10, including service subscription information. Here, the specific service subscription information may be stored in a predetermined field of the SPID (Subscription Profile ID for RAT / Frequency Selection) of the initial context setup request message. In addition, the initial context setup request message includes an attach accept message.

The eNB 100 receiving the initial context setup request message sets up the context of the UE 10. In particular, the eNB 100 transmits the specific service subscription information collected through the initial context setup request message from the MME 200 and the performance information of the UE 10 collected through the connection request message (S115) . According to the comparison, when it is confirmed from the capability information of the UE 10 that the UE 10 can support a specific service according to the specific service subscription information, the UE 10 maps the specific service subscription information to the stored information do. Then, the eNB 100 activates a function corresponding to the specific service. For example, when a specific service is LTE-A, a carrier aggregation function is activated, and radio resources for UE 10 can be allocated using a plurality of carriers. In addition, it is possible to exchange information necessary for providing Coordinated Multi-Point (CoMP) function with the adjacent eNB 100, and to provide a wireless section service through CoMP technology.

On the other hand, the eNB 100, which has received the initial context setup request message, resets the radio link with the UE 10 in step S150. In step S150, the eNB 100 allocates radio area resources for communication according to the specific service subscription information, and connects a radio bearer (DRB) according to the allocated radio section resources. To this end, the eNB 100 transmits a RRC Connection Reconfiguration message to the UE 10. Although the RRC connection is established when the UE 10 transmits an Attach Request message in step S110, the RRC connection is now permitted to be established and the parameters must be set again according to the resources allocated according to the specific service subscription information And reconfigures the radio link (RRC) connection by transmitting a RRC Connection Reconfiguration message. The RRC layer of the UE 10 allocates the radio resource using the configuration parameters received from the RRC Connection Reconfiguration message. In addition, the radio link connection reset message includes an attach accept message, whereby the UE 10 receives a connection acceptance message through a radio link connection re-establishment message.

In step S155 , the eNB 100 transmits an Initial Context Setup Response message to the MME 200 in response to the context setup request message to inform that the connection is completed.

In step S160, the UE 10 to which the radio link connection has been re-established transmits an Attach Complete message in response to the connection acceptance message to notify that the connection is completed. This connection completion message is transmitted to the MME 200 via the eNB 100. [

As described above, after the radio interval between the UE 10 and the eNB 100 is reset, the MME 200 sets a bearer between the eNB 100 and the SGW 300 in step S165. That is, the MME 200 transmits a Modify Bearer Request message to the SGW 300, and in response, the SGW 300 transmits a Modify Bearer Response message to the MME 200 By this transmission, an S1 bearer connection between the eNB 100 and the SGW 300 is established. Accordingly, the eNB 100 and the SGW 300 can transmit traffic to each other.

As described above, the location registration is performed in the specific MME 200 through the initial access procedure, and the UE 10 camped in the specific eNB 100 can move to another eNB 100. In this case, a method of transmitting the above-described specific service subscription information will be described.

5 is a flowchart illustrating a method for transferring subscription information in a handover according to an embodiment of the present invention.

5, a procedure related to an X2 interface-based handover, which is a direct interface between the source eNB 101 and the target eNB 102, when the UE 10 moves from the source eNB 101 to the target eNB 102 will be described . In particular, it is assumed that the source eNB 101 is the eNB 100 of Fig.

When a measurement event occurs, the UE 10 transmits a Measurement Report message including the signal strength information of the neighboring cell measured in step S201 to the source eNB 101, which is the current serving base station.

The source eNB 101 determines the target eNB 102 based on the signal strength information of the neighbor cell included in the measurement report message and the neighbor cell list managed by the source eNB 101 itself. Then, the source eNB 101 transmits a handover request message to the target eNB 102 in step S202.

Upon receiving the handover request message, the target eNB 102 allocates a transmission resource for the UE 10, and if the allocation of the transmission resource is successful, a handover request acknowledgment ) Message to the source eNB 101.

As described above, after preparing for handover, a handover command is transmitted to the UE 10 in step S204. This handover command can be transmitted through a RRC Connection Reconfiguration message.

Then, the source eNB 101 transmits a SN Status Transfer message to the target eNB 102 in step S205. The source eNB 101 transmits the packet transmitted and received with the UE 10 to the target eNB 102 and the source eNB 101 transmits the packet to the target eNB 102 ) From which packet to transmit / receive. The source eNB 101 then transmits to the target eNB 102 the packets to be transmitted to the UE 10 via the X2 interface in step S206 so that the target eNB 102 is connected to the UE 10 And transmits and receives packets. 4 receives the Initial Context Setup Request message in step S145 and determines whether the UE 10 receives the Initial Context Setup Request message according to the context setting procedure Service subscription information indicating that the service is subscribed to is stored. According to the embodiment of the present invention, when the source eNB 101 transmits a packet to be transmitted to the UE 10 in step S206, the source eNB 101 may also transmit the specific service subscription information described above to the target eNB 102. [ Accordingly, the target eNB 102 can know that the UE 10 is subscribed to a specific service.

The UE 10 detects the synchronization signal of the target eNB 102 in step S207 and synchronizes with the target eNB 102 and performs non-contention based random access accordingly . Then, in step S208, the target eNB 102 allocates UL transmission resources to the UE 10 (UL Allocation).

Next, in step S209, the UE 10 transmits a handover confirmation message to the target eNB 102 through a RRC Connection Reconfiguration Complete message. The UE 10 is connected to the target eNB 102 in the uplink and downlink sections and the uplink sections of the target eNB 102, the SGW 300 and the PGW 400 are connected. That is, the UE 10 can receive downlink data from the target eNB 102 (uplink data) and uplink data to the PGW 400 (uplink data).

However, the downlink from the PGW 400 to the target eNB 102 is not yet connected. Accordingly, the target eNB 102 transmits a Path Switch Request (PSR) message in step S210 to notify the UE 10 that the cell to be served is changed, and requests the path change of the EPS bearer. At this time, the target eNB 102 adds an extension parameter to the path change request (PSR) message and transmits a path change request (PSR) message including the added extension parameter to the MME 200. The target eNB 102 informs the UE 10 of the receipt of the specific service subscription information from the source eNB 101 via the extension parameter and queries whether the UE 10 can provide a specific service.

Upon receiving the path change request (PSR) message including the extension parameter, the MME 200 determines whether a specific service can be provided in step S211. In order to provide a specific service to the UE 10, the UE 10 must be subscribed to the specific service and the target eNB 102 must be set to be able to provide the specific service. The MME 200 can confirm whether or not the UE 10 joins a specific service from the specific service subscription information of the context stored at the initial connection of the UE 10. [ In addition, the MME 200 can check whether the target eNB 102 is set to provide a specific service from a pre-stored cell group service level.

The MME 200 determines that the target eNB 102 is to provide a specific service to the UE 10 according to the above determination if the SGSN 300 and the PGW (400). In other words, in order to provide a specific service, the target eNB 102 must set a context corresponding to a specific service. The MME 200 informs the SGW 300 and the PGW 400 that the target eNB 102 establishes a context corresponding to the specific service for the UE 10 and provides a specific service to the UE 10 . To this end, the MME 200 sets the cell identifier (ECGI) of the target eNB 102 and the target eNB 102 to a context corresponding to the specific service for the UE 10, To the SGW 300 and the PGW 400, a specific service provision report indicating that the provision of the service will be provided.

That is, the MME 200 transmits a Create Session Request message including a cell identifier (ECGI) of the target eNB 102 and a specific service provision report to the target SGW 302 in step S212. Accordingly, the target SGW 302 may recognize that the target eNB 102 will provide a specific service for the UE 10. [ Then, in step S213, the target SGW 302 transmits a Modify Bearer Request message including the cell identifier (ECGI) of the target eNB 102 and the specific service provision report to the PGW 400. [ Accordingly, the PGW 400 may recognize that the target eNB 102 will provide a specific service for the UE 10. [ Accordingly, although not shown, the PGW 400 may provide the UE 10 with an integrated billing system that stores the cell identifier (ECGI) of the target eNB 102 and a specific service provision report and collects information for billing Service can be provided.

Then, the PGW 400 transmits a Modify Bearer Response message in response to the received Modify Bearer Request message in step S213 to the target SGW 302 in step S214. Then, in step S215, the target SGW 302 transmits a Create Session Response message in response to the received Create Session Request message to the MME 200 in step S212. A S5 bearer may be established between the target SGW 302 and the PGW 400 through the exchange of the Modify Bearer Request message and the Modify Bearer Response message described above and a Create Session S1 bearer may be established between the target eNB 102 and the target SGW 302 through exchange of a Request message and a Create Session Response message.

Next, in step S216, the MME 200 transmits a Path Switch Request Ack message to the target eNB 102 in response to a path change request (PSR) message. This route change request confirmation message informs the target SGW 302 that the path of the S1 bearer has changed. Meanwhile, the MME 200 confirms whether the UE 10 is subscribed to a specific service through the context of the UE 10 previously stored in step S211. Accordingly, the MME 200 transmits a Path Switch Request Ack message including specific service support information to the target eNB 102, and the target eNB 102 performs context setting corresponding to the specific service . That is, when the target eNB 102 receives the path change request confirmation message including the specific service support information, the target eNB 102 sets a context corresponding to the specific service for the UE 10. [ Thereby, the target eNB 102 can provide a specific service for the UE 10. [ A specific service may exemplify CA (Carrier Aggregation) and Coord (Coordinate Multi-Point) functions.

Next, in step S217, the target eNB 102 transmits a Release Resource message to the source eNB 101 to request release of resources for the UE 10. Then, the source eNB 101 will release the resources for the UE 10.

Also, the MME 200 transmits a Delete Session Request message to the source SGW 301 in step S218. Then, the source SGW 301 releases the S1 bearer connection with the source eNB 101 and transmits a Delete Session Request message to the MME 200 informing that the session has been deleted in step S219. Thereby, the handover procedure is ended.

6 is a flowchart illustrating a method for transferring subscription information of a mobility management server according to an embodiment of the present invention.

6, the UE 10 is in the process of handing over from the source eNB 101 to the target eNB 102 and the source eNB 101 is currently providing a specific service (e.g., LTE-A) to the user equipment 100 I suppose. Upon handover, the source eNB 101 delivers the specific service subscription information to the target eNB 102 via the X2 interface. Then, the target eNB 102 will transmit a Path Switch Request message during the handover procedure.

Accordingly, the control unit 230 receives a Path Switch Request message including an extended parameter from the target eNB 102 through the interface unit 210 in step S310. The target eNB 102 queries the UE 10 via the extended parameter whether it can provide a specific service.

In accordance with the extension parameter, the controller 230 determines whether the UE 10 can provide a specific service in step S320. In order to provide a specific service to the UE 10, the UE 10 must be subscribed to the specific service and the target eNB 102 must be set to be able to provide the specific service. The control unit 230 can confirm whether the UE 10 is subscribed to a specific service based on the specific service subscription information of the context stored in the storage unit 220. In addition, the control unit 230 can determine whether the target eNB 102 can provide a specific service from the cell group service level stored in the storage unit 220. [

If it is determined in step S320 that the specific service can be provided to the UE 10, the control unit 230 transmits a specific service provision report together with the cell identifier of the target eNB 102 in step S330, And the PGW 400 are able to receive. The specific service provision report indicates that the target eNB 102 establishes a context corresponding to the specific service and provides the UE 10 with a specific service. Accordingly, the target SGW 302 and the PGW 400 that have received the specific service provision report can recognize that the target eNB 102 provides the UE 10 with a specific service. The specific service provision report is included in the extension field of the Create Session Request message and is transmitted to the target SGW 302. In addition, the target SGW 302 includes a specific service provision report in an extension field of a Modify Bearer Request message and transmits it to the PGW 400.

The control unit 230 transmits specific service support information to the target eNB 102 so that the target eNB 102 sets a context for the UE 10 corresponding to the specific service in step S340. This specific service support information is included in the Path Switch Request Ack message and is transmitted to the target eNB 102. [ Then, the target eNB 102 may set the context according to the specific service support information and provide the corresponding specific service to the UE 10.

On the other hand, if it is determined in step S320 that the UE can not provide a specific service, the controller 230 proceeds to step S350 and performs the remaining procedure of the handover according to a normal procedure.

7 is a flowchart illustrating a method for transmitting subscription information of a base station according to an embodiment of the present invention.

It is assumed in FIG. 7 that the UE 10 is handing over from the source eNB 101 to the target eNB 102 and the source eNB 101 is currently providing the UE 100 with a specific service (e.g., LTE-A) do. Upon handover, the source eNB 101 delivers the specific service subscription information to the target eNB 102 via the X2 interface. Then, the control module 140 of the target eNB 102 receives the specific service subscription information through the interface module 110 in step S410.

In step S420, the control module 140 receiving the specific service subscription information transmits a Path Switch Request message including an extension parameter to the MME 200 through the interface module 110. [ The control module 140 of the target eNB 102 informs the UE 10 of the receipt of the specific service subscription information from the source eNB 101 via the extended parameter and inquires whether the UE 10 can provide a specific service.

The MME 200 receiving the extension parameter determines whether the UE 10 can provide a specific service through the previously stored specific service subscription information and the cell group service level. As a result of the determination, if the UE 10 is subscribed to a specific service, the MME 200 determines that the target eNB 102 has a route including the specific service support information so as to set the context for the UE 10 corresponding to the specific service And may send a Path Switch Request Ack message to the target eNB 102. On the other hand, if it can not provide a specific service as a result of the determination, the MME 200 will transmit a Path Switch Request Ack message to the target eNB 102 that does not include the specific service support information.

Therefore, the control module 140 of the target eNB 102 determines whether a Path Switch Request Ack message including specific service support information is received in step S430.

As a result of the checking in step S430, when receiving the path change request confirmation message including the specific service support information, i.e., receiving the specific service support information, the control module 140 determines, based on the specific service support information received in step S440 A context corresponding to a specific service is set, and a function corresponding to the specific service is activated. For example, when a specific service is LTE-A, such a function may be CA (Carrier Aggregation), Coordinated Multi-Point (CoMP), or the like.

On the other hand, if it is determined in step S430 that the route change request confirmation message including no specific service support information is received, that is, if the specific service support information is not received, the control module 140 performs a normal procedure in step S450 Perform the rest of the handover procedure.

The method for transferring subscription information according to an embodiment of the present invention as described above may be provided in the form of a computer readable medium suitable for storing computer program instructions and data. At this time, a computer-readable medium suitable for storing computer program instructions and data includes, for example, a magnetic medium such as a hard disk, a floppy disk and a magnetic tape, a compact disk read only memory (CD-ROM) Optical media such as a DVD (Digital Video Disk), a magneto-optical medium such as a floppy disk, and a ROM (Read Only Memory), a RAM , Random Access Memory), flash memory, EPROM (Erasable Programmable ROM), and EEPROM (Electrically Erasable Programmable ROM). The processor and memory may be supplemented by, or incorporated in, special purpose logic circuits. Examples of program instructions may include machine language code such as those generated by a compiler, as well as high-level language code that may be executed by a computer using an interpreter or the like. Such a hardware device may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

While the specification contains a number of specific implementation details, it should be understood that they are not to be construed as limitations on the scope of any invention or claim, but rather on the description of features that may be specific to a particular embodiment of a particular invention Should be understood. Certain features described herein in the context of separate embodiments may be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment may also be implemented in multiple embodiments, either individually or in any suitable subcombination. Further, although the features may operate in a particular combination and may be initially described as so claimed, one or more features from the claimed combination may in some cases be excluded from the combination, Or a variant of a subcombination.

Likewise, although the operations are depicted in the drawings in a particular order, it should be understood that such operations must be performed in that particular order or sequential order shown to achieve the desired result, or that all illustrated operations should be performed. In certain cases, multitasking and parallel processing may be advantageous. Also, the separation of the various system components of the above-described embodiments should not be understood as requiring such separation in all embodiments, and the described program components and systems will generally be integrated together into a single software product or packaged into multiple software products It should be understood.

It should be noted that the embodiments of the present invention disclosed in the present specification and drawings are only illustrative of specific examples for the purpose of understanding and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention are possible in addition to the embodiments disclosed herein.

The present invention relates to an apparatus and method for transmitting subscription information in a wireless communication system. According to the 3GPP standard, only the system capable of providing each of the LTE and LTE-A services is specified, and a system capable of providing all the services at the same time is not considered. Thus, when the UE handles, the source eNB provides specific service subscription information to the target eNB, and the target eNB queries the MME as to whether it can provide a particular service. Upon receipt of the query, the MME confirms whether the target eNB can provide a specific service to the UE through the specific service subscription information and the cell group service level stored therein. If the UE is subscribed to a specific service and the target eNB is set to provide a particular service, the MME provides specific service support information to the target eNB. Then, the target eNB sets the context according to the specific service support information and provides a specific service to the UE. The MME also informs the SGW and the PGW that the target eNB is providing the UE with a particular service. According to the present invention, the HSS does not need to inquire whether the UE is subscribed to a specific service, and the traffic to the home subscriber server is reduced, so that the performance of the entire system can be improved. In addition, the MME informs the SGW and the PGW that the target eNB provides the UE with a specific service. As a result, it can be utilized as information for charging for a specific service. This is not only a possibility of commercialization or sales, but also a possibility of being industrially applicable since it is practically possible to carry out clearly.

100: base station, eNB 110: interface module
120: communication module 130: storage module
140: control module 200: mobility management server, MME
210: interface unit 220: storage unit
230: Control section 300: Serving gateway, SGW
400: packet gateway, PGW 500: home subscriber server, HSS
600: subscriber policy management server, PCRF

Claims (9)

An interface unit for receiving a path change request message including a query as to whether a specific service can be provided to the user equipment from a target base station at the time of handover of the user equipment; And
And a controller for transmitting a route change request confirmation message including specific service support information to the target BS through the interface unit when it is determined that the specific service can be provided according to the inquiry, The mobility management server comprising: The method according to claim 1,
The control unit
And a specific service provision report is transmitted through the interface unit so that the target serving gateway and the packet gateway recognize that the target base station provides a specific service when it is determined that the specific service can be provided. server. 3. The method of claim 2,
The control unit
The target serving gateway may include the specific service provision report in the extension field of the session creation request message and transmit the specific service provision report to the packet gateway by including the specific service provision report in the extension field of the modification request message Wherein the mobility management server transmits the mobility management information to the mobility management server. The method according to claim 1,
And a storage unit for storing a cell group service level in which the specific service subscription information of the user equipment received from the home subscriber server and the availability of a specific service of the target base station is recorded at the initial connection of the user equipment,
The control unit confirms the fact that the user equipment is subscribed to the specific service according to the specific service subscription information and if the target base station is set to provide the specific service according to the cell group service level, The mobility management server forwards the subscription information to the mobility management server. An interface module for receiving specific service subscription information of the user equipment from a source base station upon handover of the user equipment; And
Upon receipt of the specific service subscription information, inquires of the mobility management server via the interface module whether or not a specific service can be provided to the user device, and upon receipt of specific service support information from the mobility management server, And a control module for setting a context for providing the specific service to the target base station. 6. The method of claim 5,
The control module
A routing change request message including an extension parameter to the mobility management server to inquire whether or not a specific service can be provided to the user device, and in response to the route change request message, And receives a confirmation message from the mobility management server. Receiving a path change request message including a query as to whether a specific service can be provided to the user equipment from a target base station at the time of handover of the user equipment;
Determining whether the specific service can be provided according to the inquiry; And
And transmitting a route change request confirmation message including specific service support information to the target BS so as to set a context according to the determined specific service according to the determination. A method for delivering subscription information to a management server. 8. The method of claim 7,
After the determining step,
And transmitting a specific service provision report so that the target serving gateway and the packet gateway recognize that the target base station sets a context corresponding to the specific service if the specific service can be provided. A method for delivering subscription information to a management server. Receiving, upon handover of a user equipment, specific service subscription information of the user equipment from a source base station;
Upon receiving the specific service subscription information, querying the mobility management server whether the specific service can be provided to the user device; And
And setting a context for providing the specific service when the specific service support information is received from the mobility management server according to the query.

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