KR101551499B1 - QoS control method of indoor base station and mobile communication system therefor - Google Patents

Abstract

A QoS control method capable of providing services of different QoS levels for each user of an indoor base station and a mobile communication system therefor are disclosed. According to the present invention, when the terminal is connected, the indoor base station controls the physical connection of the terminal based on the home user list considering the resources, encodes the connection control result in the authentication message, The server decodes the authentication message to check the connection control result, and configures the per-user QoS profile according to the connection control result upon successful authentication. Thereafter, the ASN gateway applies different QoS according to the QoS policy determined based on the QoS profile. The QoS policy determined at this time is determined by the ASN gateway or determined by the policy server according to the request of the ASN gateway through the IP-CAN session establishment process and transmitted to the ASN gateway.

Indoor base station, QoS, policy server, authentication server, CSG

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a QoS control method for an indoor base station and a mobile communication system for the same,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile communication system, and more particularly, to a QoS control method capable of providing different QoS (Quality of Service) level services for each user of an indoor base station and a mobile communication system therefor.

Recently, due to the rapid development of communication, computer network and semiconductor technology, not only various services using wireless communication networks have been provided, but the demand of users has been increasing day by day, and the global wireless Internet service market has been exploding Trend. Accordingly, a service provided by a mobile communication system using a wireless communication network is being developed not only as a voice service, but also as a multimedia communication service for transmitting various data.

Wireless data services of CDMA (Code Division Multiple Access) 2000, EV-DO (Evolution Data Only), WCDMA (Wideband CDMA) and WLAN (Wireless Local Area Network) have been commercialized. Recently, A mobile communication service is provided by installing a small mobile communication base station indoors so as to access a core network of mobile communication through an indoor broadband network according to the trend. In particular, in a next-generation network system, a method of arranging a plurality of small-sized multiple cells (small-sized mobile communication base stations) as an alternative to meet a demand for a high data rate and stably providing various services has been proposed. Such a small power mobile communication base station is called an indoor base station or a femto base station. By reducing the size of the cell, the efficiency of a next generation network system using a high frequency band can be increased. In addition, the use of a plurality of small-sized cells is advantageous in terms of increasing the frequency reuse frequency. In addition, it is possible to improve the problem of deterioration of the channel condition due to the radio wave attenuation which occurred when one base station covers the entire cell area and the problem of inability to service the users in the shadow area, This has the advantage. Based on these advantages, a scheme combining a macro cell (a cell area managed by an outdoor base station) and a femtocell (a cell area managed by an indoor base station or a femto base station) (Femto-cells) .

Users who use the femtocell service are divided into "Home User", "Non-home User", and "Emergency User". A home user can use an indoor base station by registering an account owner or an operator of an indoor base station. Non-home users can use indoor base stations without registration. Emergency User is not a user registered in a macro cell or a femtocell service, but it is possible to use an indoor base station especially for an emergency service (for example, 911 service).

The femtocell can be classified into CSG Closed, CSG Open, and Open Mode depending on the mode in which the femtocell is operated. CSG Closed Mode can be used only for Home User and Emergency User. CSG Open Mode can be used not only for Home User and Emergency User but also for non-home users when there is no resource available. An indoor base station operating in Open Mode can be used by a non-home user without a home user registration, and an emergency user can also be used.

As described above, the femtocell is differentiated according to the mode of operation, and accordingly, differentiated control of the service is required. For example, a femtocell operating in CSG Open Mode may allow a non-home user to access a call when there is a spare resource, but a non-home user should receive a differentiated service than a home user. However, in the related art, only the physical access control of the user is possible at the indoor base station, and differentiated services can not be provided for the connected users (Home User, Non-home User, and Emergency User connected to the femtocell operating in the CSG Open Mode) Respectively.

That is, even if a policy server (PCC (Policy and Charging Control) Framework) is implemented, information on the terminal can not be transmitted to the PCC Framework. Only the physical connection is controlled at the indoor base station only, and the QoS of the Home User service can not be guaranteed. For example, in a case of an indoor base station operating in the CSG closed mode, if a non-home user uses a heavy load service, the QoS of the home user service will be adversely affected. Therefore, it is required to provide different QoS for each home user, non-home user, and emergency user connected to the indoor base station operating in the CSG closed mode.

It is an object of the present invention to provide a QoS control method and a mobile communication system therefor, which can provide services of different QoS levels for each user of an indoor base station.

According to an aspect of the present invention, a QoS control method and a mobile communication system therefor that can provide services of different QoS levels for each user of an indoor base station are disclosed. According to the present invention, when the terminal is connected, the indoor base station controls the physical connection of the terminal based on the home user list considering the resources, encodes the connection control result in the authentication message, The server decodes the authentication message to check the connection control result, and configures the per-user QoS profile according to the connection control result upon successful authentication. Thereafter, the ASN gateway applies different QoS according to the QoS policy determined based on the QoS profile. The QoS policy determined at this time is determined by the ASN gateway or determined by the policy server according to the request of the ASN gateway through the IP-CAN session establishment process and transmitted to the ASN gateway.

In addition, when an application requests an application service while a visitor maintains a session, a service request is transmitted to the AF, and the ASN gateway applies QoS according to the re-established QoS policy based on the service information of the AF. At this time, the redetermined QoS policy is determined by the ASN gateway based on the service information of the AF according to the service request of the AF, or is determined by the policy server based on the AF service information and transmitted to the ASN gateway.

According to the present invention, it is possible to provide different QoS for each Home User, Non-home User, and Emergency User connected to the indoor base station operating in the CSG Closed Mode, so that a premium service can be provided to the Home User, Quality is guaranteed, and there is less possibility of overloading by non-home user services.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions will not be described in detail if they obscure the subject matter of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a diagram showing a configuration of an exemplary mobile communication network in which the present invention can be implemented. Fig.

In one embodiment, the mobile communication network may be a 2G mobile communication network such as GSM (Global System for Mobile communication), CDMA, an LTE network, a wireless Internet such as WiFi, a Wireless Broadband Internet (WiBro) and a World Interoperability for Microwave Access (E.g., 3G mobile communication network such as WCDMA or CDMA2000, High Speed Downlink Packet Access (HSDPA) or 3.5G mobile communication network such as HSUPA (High Speed Uplink Packet Access), or the like 4G to be developed in the future), and any other mobile communication network including a Macro-eNB, a Home-eNB, and a UE as its constituent elements. no.

As shown in FIG. 1, the mobile communication network may be composed of one or more network cells, and different kinds of network cells may be mixed in the mobile communication network. The mobile communication network includes an indoor base station (Home-eNB) 21 to 25 that manages a narrow range of network cells (hereinafter referred to as 'femtocells'), a wide range of cells A mobile station (UE) 10, a self organizing & optimizing network (SON) server 30, an MME 40, and the like. The number of each component shown in FIG. 1 is illustrative, and the number of each component of the mobile communication network in which the present invention can be implemented is not limited to the number shown in the drawings.

The outdoor base station (Macro-eNB) 20 can be used in, for example, an LTE network, a WiFi network, a WiBro network, a WiMax network, a WCDMA network, a CDMA network, a UMTS network, But is not limited to, the characteristics of a macro cell base station that manages the cell.

The home base stations (Home-eNB) 21 to 25 can be used in, for example, an LTE network, a WiFi network, a WiBro network, a WiMax network, a WCDMA network, a CDMA network, a UMTS network, But is not limited to, a femtocell base station that manages a cell having a radius of.

The network cell constituting the mobile communication network may include a macro cell and a femtocell. The macro cell can be managed by the outdoor base station 20 and the femtocell can be managed by the indoor base stations 21 to 25. [

The outdoor base station 20 and the indoor base stations 21 to 25 can be connected to communicate with each other via a separate backbone network and the indoor base stations 21 to 25 and the outdoor base station 20 can be connected independently And can have connectivity of the core network. In addition to the macro base station and the femto base station, the outdoor base station 20 and the indoor base stations 21 to 25 may be replaced with a pico base station or a micro base station.

The UE 10 is used in a portable Internet network such as a GSM network, a 2G mobile communication network such as a CDMA network, a wireless Internet network such as an LTE network and a WiFi network, a WiBro network and a WiMax network or a mobile communication network supporting packet transmission But are not limited to, features of wireless mobile terminals. In one embodiment, the terminal 10 may be a macrocell subscriber terminal and / or a femtocell subscriber terminal.

The SON server 30 may include any server that performs the installation / optimization of an outdoor / indoor base station and provides basic parameters or data necessary for each base station.

The MME 40 may include any entity used for managing call processing and the like of the terminal 10.

One SONET 30 and the MME 40 may perform functions of both the SON server 30 and the MME 40. The SON server 30 and the MME 40 may be connected to one or more outdoor base stations 20, One or more indoor base stations 21 to 25 can be managed.

Although the network cell in which the macro cell and the femtocell are mixed is assumed in the mobile communication network, the network cell can be composed of only a macro cell or a femtocell.

In the mobile communication network, access to a macro cell is allowed to all terminals, but access to a femtocell can be limited to a specific terminal (subscriber). Specifically, the indoor base stations 21 to 25 can broadcast SIB 1 (System Information Block type 1), which is information on a femtocell managed by the indoor base stations 21 to 25. In SIB 1, access to the femtocell is limited And a CSG indicator (Closed Subscriber Group indicator) indicating whether or not the CSG indicator is included. If the CSG indicator in the SIB 1 broadcasted by the indoor base stations 21 to 25 has a value of 'True', communication is performed in a closed manner in which only a specific subscriber can access the femtocell (CSG : Closed Subscriber Group), and if it has a value of 'false', communication is established in an open type (OSG: Opened Subscriber Group) in which all subscribers can access the femtocell. If the CSG indicator has a value of 'TRUE', the terminal 10 only transmits the femtocell to the corresponding femtocell if it is confirmed that the corresponding femtocell is included in the whitelist (White List) Access. For an indoor base station operating in the CSG closed mode, only a user (Home User) and an emergency user (Emergency User) defined in the home user table can access and provide services to the corresponding indoor base station. For the indoor base station operating in the CSG Open Mode, not only the user (Home User), the emergency user (Emergency User) defined in the home user table but also the non-home user A home user can be provided with a higher priority service than a non-home user. An indoor base station operating in Open Mode can be used by a non-home user without a home user registration, and an emergency user can also be used.

Specifically, the indoor base station that operates in the Open Mode permits the call connection of the non-home user when the resource is available, and the call connection of the non-home user is limited when there is no resource. Open Mode The indoor base station that is operated in advance reserves the resources for the emergency user, and the emergency user is allowed to access the call using the corresponding resource.

In addition, the indoor base station operating in the CSG closed mode permits the call connection of the home user when the resource is available, and restricts the call connection of the home user when the resource is not available. The indoor base station operating in the CSG closed mode reserves resources for the emergency user in advance, and the emergency user is allowed to access the call using the corresponding resource.

In addition, the indoor base station operating in CSG Open Mode allows call access of non-home users when resources are available, and restricts call access of non-home users when resources are not available. The home user's call connection is allowed after releasing the call of the non-home user. If there is no resource available and all users are Home Users, the call connection of the new Home User is restricted. The indoor base station operating in CSG Open Mode reserves resources for Emergency User in advance, and Emergency User is allowed to access the call using the corresponding resource.

Therefore, call connection of Emergency User can be assured even if there is no resource of the indoor base station. Also, in case of CSG Open Mode in which home user and non-home user are used in combination, Can be guaranteed.

In particular, all indoor base stations belonging to the indoor base station group operating in the CSG closed mode allow access only to the terminal (10 of the home user) which is permitted to access. The terminal 10 belonging to the femtocell controlled by the indoor base stations 21 to 25 has the indoor base station ID called the white list and can only access to the indoor base station belonging to the whitelist, It does not. For example, assuming that the indoor base stations 22 to 25 are 'CSG closed base stations' in the femtocell (assuming that they are registered as home users in the indoor base station 25), the indoor base station 21 is referred to as' (Including a CSG open base station with a resource allowance), the OSG base station 21 and the CSG base station 25 are indoor base stations belonging to the whitelist. Since the OSG base station 21 can be used by a non-home user, the OSG base station 21 belongs to a whitelist. (The home user of the terminal 10 is a non-home user in the OSG base station 21). Therefore, all the terminals (Non-home User, Emergency User) can be connected to the indoor base station 21, but only the terminals (Home User, Emergency User) permitted to connect to the indoor base stations 22 to 25 can access .

For example, a procedure in which a terminal 10 of a non-home user accesses an indoor base station (for example, 21 and 25) will be described. Based on the CSG indicator of the SIB 1 broadcasted by the indoor base stations 21 to 25, the UE 10 can determine whether or not the connection to the femtocell is restricted. The physical cell identity (PCI), which is a cell classification factor in the physical layer, and the global cell identifier (GCI), which is a unique cell classification factor in the mobile communication network, are used as the identifiers for identifying the femtocell by the terminal 10, Global Cell Identity). The cell identifier is included in the SIB 1 broadcasted by the indoor base stations 21 to 25. In one embodiment, when the terminal 10 detects that it is the connected base station 21 or 25, it reports to the outdoor base station 20 and reports the detection of the indoor base station 21 or 25 from the terminal 10, The control unit 20 reads the SIB 1 received from the indoor base station 21 or 25 detected by the corresponding terminal 10 and instructs the SIB 1 to report the cell identifier (PCI or CGI) of the corresponding indoor base station 21 or 25 And judges whether or not the corresponding terminal 10 can be connected to the detected indoor base station 21 or 25 detected based on the cell identifier and the whitelist that the terminal 10 has read and obtained. If it is determined that the corresponding terminal 10 can be connected to the detected indoor base station 21 or 25, handover to the corresponding indoor base station 21 or 25 is allowed.

2 is a diagram illustrating a configuration of a mobile communication system for providing differentiated QoS for each user according to an embodiment of the present invention. Hereinafter, the indoor base station 200 refers to the indoor base stations 21 to 25 of FIG. 1 operating in the CSG open mode (CSG closed mode). The connected user actually connects to the indoor base station 200 (Home User, Non-home User, Emergency User).

The present invention transmits the connection control result performed by the indoor base station 200 to the authentication server 80 and gives the QoS profile according to the personality of the contact person in the authentication server 80, (Ie, Service Flow) for each User, Non-home User, and Emergency User. The QoS profile includes the allowable number of service flows, permissible service types (BE, UGS, ERT-PS, RT-PS) and QoS parameters for each user classified by NAI. By assigning QoS profiles differently according to the accessor type, differentiated QoS can be provided for each accessor.

For this purpose, according to an embodiment of the present invention, a mobile communication system (femtocell network) for Initial Service Flow (ISF) and / or Pre-provisioned Service Flow (QoS) And controls the physical connection of the terminal 10 based on the home user list 201 and outputs the connection control result (connection type information for attempting call connection, i.e. Home User, Non-home User, and Emergency User information) (E.g., an EAP authentication message), and an indoor base station 200 that decodes the authentication message to check the connection control result, and when the authentication is successful, And an ASN (Access Service Network) gateway 50 for applying different QoS to each accessor according to a QoS policy determined based on the QoS profile. At this time, in the first embodiment, the QoS policy is determined by the ASN gateway 50 based on the local policy DB. In the second embodiment, the ASN gateway 50 requests the policy server 90 through the IP-CAN session establishment process, the policy server 90 determines according to the request of the ASN gateway 50, and the ASN gateway 50 ).

In addition, according to another embodiment of the present invention, a mobile communication system for Dynamic Service Flow (QoS) includes an application function (AF) 60 when an application requests an application service (VoIP service, for example) And the ASN gateway 50 further has a function of applying the QoS according to the QoS policy re-determined on the basis of the service information of the AF 60. At this time, the QoS policy is determined based on the service information of the AF 60 in the ASN gateway 50 according to the service request of the AF 60 in the first embodiment. In the second embodiment, the policy server 90 determines the QoS policy based on the service information of the AF 60, and transmits the QoS policy to the ASN gateway 50.

The difference between the first and second embodiments is whether or not the policy server 90 is involved. In other words, the subject that determines / re-determines the QoS policy is the ASN gateway 50 in the first embodiment, and the policy server 90 in the second embodiment. For the first embodiment in which the policy server 90 is not involved, the ASN gateway 50 itself has a local policy DB.

The indoor base station 200 includes an access controller 202 that controls the physical connection of the terminal 10 based on the home user list 201 in consideration of resources and an access control unit 202 that encodes the access control result into an EAP authentication message And an EAP encoder 203.

The authentication server 80 includes an EAP decoder 801 for decrypting the EAP authentication message transmitted from the indoor base station 200, an access control unit 801 for checking the connection control result included in the EAP authentication message, And a profile manager 802 that constitutes a profile 803. The QoS profile 803 configured differently for each accessor is stored in the Subscriber Profile Repository (SPR) of the authentication server 80. The SPR has all relevant subscriber information necessary for the QoS policy for the pre-provisioned service flow according to the embodiment of the present invention and the QoS policy for the dynamic service flow according to another embodiment of the present invention.

A detailed description of the QoS profile 803 configured for each accessor is as follows.

The QoS profile 803 is defined for each accessor, and the accessor is distinguished by an identifier of the terminal 10 called a Network Access Identifier (NAI).

For the first and second embodiments, the QoS profile for the pre-provisioned service flow and the dynamic service flow is configured in the authentication server 80, stored in the SPR, and transmitted to the ASN gateway 50. For the second embodiment, the QoS profile stored in the SPR of the authentication server 80 is referred to by the policy server 90.

The QoS profile 803 is basically constructed as follows and can be added / changed according to the implementation method.

1. Number of SFs: The number of types of service flows (SFs) that the UE 10 can generate.

2. Service Flow Parameters

(1) Scheduling Type: This is the Scheduling Type of the Service Flow. It controls the priority of the traffic transmission by applying different Scheduling Type according to the attributes of the service. The types of scheduling type are as follows.

 - UGS: supports Real-time Service Flow like VoIP. Reduce overhead and latency to meet real-time requirements.

- RT-PS: Support Real-time Service Flow like MPEG Video.

- NRT-PS: Used for non-real-time service flow. Provide Regular Basis Unicast Poll.

- BE: to deliver non-real-time Best Effort traffic.

(2) Maximum Sustained Traffic Rate

(3) Minimum Reserved Traffic Rate

(4) Maximum Latency

(5) Tolerated Jitter

In order to notify the authentication server 80 of the access control result (accessor type information, i.e., Home User, Non-home User, and Emergency User information) in which the indoor base station 200 attempts to access a call, Use Expanded Type defined for specific purpose. The access control result is valid only in the Initial EAP Response / Identity message and is included in the EAP Response / Identity message with 254 (Expanded Type) (see FIG. 3). EAP authentication is a standardized authentication method currently available, EAP-MD5 for authenticating user IDs and passwords, and public key based EAP-TLS. In order for a terminal user to use EAP-MD5 or EAP-TLS authentication, it must have an access program for this purpose. In the EAP-TLS authentication method, the wireless LAN card driver must support IEEE 802.1x, but the EAP-MD5 authentication method can use the existing IEEE 802.11 wireless LAN card driver as it is.

The form of the EAP Response / Identity message including the connection control result is shown in Table 1 below.

The indoor base station 200 performs access control at the access controller 202, encodes the connection control result at the EAP encoder 203 as shown in Table 1, and transmits the access control result to the authentication server 80 through the authentication message. The authentication server 80 must be able to decode the access control results included in the Expanded Type. To this end, the EAP decoder 801 decodes the EAP authentication message to extract the connection control result, and the profile manager 802 configures the per-user QoS profile 803 according to the connection control result included in the EAP authentication message .

The authentication server 80 maintains and manages the QoS profile for each user for QoS control. The QoS profile may vary according to the provider policy, and an example thereof is shown in Table 2 below.

In case of Home User, there is no restriction on service flow generation. In the case of Visiting User (Non-home User), it is possible to create only two Initial Service Flow UL / DL that are generated basically. In case of Emergency User, Initial Service Flow UL In addition to the two DLs, UL / DL UGS Service Flow for Emergency Call can be defined to be generated.

When the authentication message is transmitted to the authentication server 80, the EAP decoder 801 decodes the EAP Response / Identity message to confirm the user ID and the connection control result. When the authentication procedure is successful, the profile manager 802 assigns a different QoS profile to each user according to the access control result value, and the generated QoS profile generates / updates corresponding subscriber information of the SPR. Therefore, each user (Home User, Non-home User, and Emergency User information) is subjected to different QoS profiles.

A method of assigning different QoS profiles to each user is as follows.

- Home User: Any type of service flow requested by Home User terminal is acceptable. For example, a UGS service flow can be generated when a home user makes a VoIP attempt, and an RT-PS service flow can be generated when a video communication attempt is made. An example of a QoS profile for a Home User is shown in FIG. In Fig. 7A, the value of each parameter is only an example, and it can be changed according to a provider policy.

- Visiting User (Non-home User): Visiting User terminal can restrict the nature of service flow that can be created. Only the Best Effort service is made available so that the Home User is not affected by the Visiting User's service. Therefore, when a visiting user requests to perform VoIP communication, Best Effort Service Flow created at the time of network entry is used. In this case, the quality of VoIP communication will be lower than that of Home User. An example of the QoS profile for the Visiting User (Non-home User) is shown in FIG. In Fig. 7B, the value of each parameter is only an example, and may be changed according to a business policy.

- Emergency User: Emergency User should allow VoIP call in emergency. Therefore, it is allowed to generate UGS Service Flow in addition to Best Effort Service Flow created at the time of network entry. An example of a QoS profile for Emergency User is shown in FIG. In Fig. 7C, the value of each parameter is only an example, and may be changed according to a business policy.

Referring to FIG. 2 again, each indoor base station 200 performs an authentication process when it is powered on, and then transmits location information (up and down information) to its own location through GPS, A-GPS, And reports it to the base station management server (ACS) 70. The indoor base station management server 70 stores and manages location information reported from each indoor base station 200 in the DB.

FIG. 4 is a flowchart illustrating a procedure for determining a QoS policy according to an exemplary embodiment of the present invention. Referring to FIG. 4, a process of performing initial service flow (ISF) and / or pre-provisioned service flow Lt; / RTI >

When the terminal 10 attempts a call connection (S401), the indoor base station 200 starts connection control at the beginning of a call connection attempt (S402). At this time, the connection controller 202 of the indoor base station 200 confirms resource redundancy, performs connection control based on a home user list (home user list) 201 stored in the internal DB, Distinguishes whether the user is a home user, a non-home user, or an emergency user.

The EAP encoder 203 of the indoor content base station encodes the connection control result (user type information for attempting call connection, that is, Home User, Non-home User, and Emergency User information) in addition to the EAP authentication message received from the terminal 10 . The indoor base station 200 transmits an EAP message including the connection control result to the ASN gateway 50 in step S403 and the ASN gateway 50 transmits the EAP authentication message to the authentication server 80. [

The EAP decoder 801 of the authentication server 80 decodes and verifies the access control result value for the user identity (User Identity) in the EAP authentication message (EAP Response / Identity message) The QoS profile 803 is configured to update the corresponding subscriber information of the SPR (S406).

For the pre-provisioned service flow, the authentication server 80 transmits the EAP success message including the QoS profile 803 to the ASN gateway 50 (S407).

The terminal 10 and the ASN gateway 50 perform the authentication remaining part and the registration procedure in step S408 and send and receive messages between the terminal 10 and the ASN gateway 50 in order to generate the service flow in step S409, (Step S410).

Now, the ASN gateway 50 can apply different QoS according to the QoS policy determined based on the QoS profile transmitted from the authentication server 80 through the EAP success message. As an example of a method of determining the QoS policy at this time, the ASN gateway 50 may determine based on the local policy DB according to the first embodiment. In the case of a network in which Policy and Charging Control (PCC) is not introduced, the SFA (Service Flow Agent) of the ASN gateway 50 determines the QoS policy based on the local policy DB. As another example, in the case of a network in which PCC is introduced, the ASN gateway 50 requests the policy server 90 through the IP-CAN session establishment procedure (S411) according to the second embodiment, The policy server 90 determines the QoS policy and transmits the QoS policy to the ASN gateway 50.

The IP-CAN session establishment process S411 between the SFA of the ASN gateway 50 and the Policy and Charging Rule Function (PCRF) of the policy server 90 determines whether the terminal 10 enters the network (Network Entry) after IP address allocation is completed. A detailed description thereof will be given later with reference to FIG.

Thus, between the terminal 10 and the ASN gateway 50, an ISF (Initial Service Flow), that is, a service flow (QoS) of a best effort attribute that is basically generated after entering the network of the terminal 10 and / or a pre- ) Is possible (S412).

Anchor SFA (Service Flow Authorization) of the ASN gateway 50 has an interface with the PCRF of the policy server 90 for determining the QoS policy for the IP-CAN session establishment process (S411). The anchor SFA of the ASN gateway 50 in the network environment in which the dynamic QoS based on the PCC framework is supported (i.e., the environment in which the policy server 90 is implemented) And contacts the Anchor PCEF (Policy and Charging Enforcement Function) of the gateway 50 (the second embodiment). The Anchor SFA of the ASN gateway 50 itself determines the QoS policy under the network environment in which the PCC framework is not implemented (i.e., the environment in which the policy server 90 is not implemented) (the first embodiment).

5, when the ASN gateway 50 receives the QoS profile from the authentication server 80, the IP-CAN session establishment process (S411) sets the QoS policy to the PCRF of the policy server 90 It is the request process. The PCRF obtains the QoS profile from the SPR of the authentication server 80 and determines the QoS policy with the QoS profile.

The IP-CAN session establishment procedure refers to a procedure for establishing an association between the terminal 10 and the IP network. An association is identified by a terminal IP address. When an IP is allocated, an IP-CAN session is created. When the allocated IP is released, the IP-CAN session is also terminated. If the IP-CAN session is established, the QoS policy determined by the policy server 90 is applied to the terminal 10. When the ASN gateway 50 requests the policy server 90 and the policy server 90 sends the QoS policy If the determined result is sent, the ASN gateway 50 applies the determined QoS policy.

Specifically, the anchor SFA of the ASN gateway 50 requests the anchor PCEF of the ASN gateway 50 to set up an IP-CAN session to request the QoS policy to the PCRF of the policy server 90 (S501).

The anchor PCEF of the ASN gateway 50 transmits an IP-CAN session setup indication message to the PDF of the policy server 90, which is an entity for transmitting the related message to the PCRF (S502), and the PDF of the policy server 90 is transmitted to the appropriate PCRF (Step S503).

The PCRF of the policy server 90 receives the QoS profile from the SPR of the authentication server 80 (S504 and S505), and determines the QoS policy based on the QoS profile (S506). The determined QoS policy is transmitted to the PCEF of the ASN gateway 50 through the PDF via the IP-CAN session setup approval message (S507 and S508), and the PCEF of the ASN gateway 50 transmits the QoS policy determined by the policy server 90 , Different QoSs are applied to each user (S509). The QoS policy result is notified to the SFA of the ANS gateway 50 (S510), and a known accounting related procedure is performed (S511 to S514).

FIG. 6 is a flowchart illustrating a procedure for changing a QoS policy according to an embodiment of the present invention, and shows a process of performing Dynamic Service Flow (QoS) during a service.

The dynamic service flow refers to a service flow that is additionally created / modified / deleted after the ISF / pre-provisioned service flow is created. That is, the dynamic service flow is a series of call processing steps performed to change the parameters of a created service flow or to open a new service flow. Specific Authorization is required to create such a service flow. Therefore, if the dynamic service flow is supported with the PCC framework, the policy / authorization check is performed by the PCRF. Then, when the service is authorized, the service flow is generated using the QoS profile corresponding to the service.

Specifically, when the AF session signaling has occurred, the AF 60 provides service information to the PCRF to confirm the QoS policy (S601). The PCRF of the policy server 90 binds the IP-CAN session for the service information from the AF 60 and performs Authorization and Policy Decision (S602). At this time, the PCRF of the policy server 90 refers to the connection control result and the QoS profile stored in the SPR of the authentication server 80, and determines a QoS policy according to the personality of the contact person with respect to the service information from the AF 60. For example, if a VoIP service request is received, the Visited User (Non-home User) receives the VoIP service using the ISF that has been created without generating an additional service flow. The PCRF of the policy server 90 delivers the QoS policy to the PDF in step S603 and the PDF transmits the QoS policy to the PCEF in the ASN gateway 50 in step S604. QoS can be applied (S605).

The PCEF of the ASN gateway 50 informs the SFA of the new QoS policy (IP-CAN Bearer Modification) (S606) and receives a response from the SFA (S607), transmits a response message to the PDF of the policy server 90 S608), the PDF transmits a response message to the PCRF (S609). The PCRF of the policy server 90 stores the service information and transmits a response message to the AF 60 (S610).

Thereafter, the well-known Accounting-related procedure is performed (S611 to S614).

When a terminal attempts to access a WiMAX network by using a program such as a VoIP application while a WiMAX session is maintained, the service request is directly transmitted to the AF (Application Function) In other words, AF can be thought of as an Entity that acts as a Server. The AF 60 sends the service information to the PCRF of the policy server 90 so that the PCRF determines the QoS policy for the service request and sets QoS parameters for creating the service flow.

For example, when the terminal requests a service such as VoIP, if the QoS profile received from the PCRF of the policy server 90 is defined to support the UGS, the anchor SFA / A-PCEF of the ASN gateway 50 transmits a new service flow ) Can be generated. If the terminal 10 is a Visiting User (Non-home User), the VoIP service is used by using the existing Best Effort service flow instead of generating a new service flow (QoS).

As another example of a method of determining the QoS policy, although not shown in the drawings, the ASN gateway 50 may determine based on the local policy DB. That is, in the case of a network in which the PCC is not introduced, when the AF 60 delivers the service information to the ASN gateway 50, the SFA of the ASN gateway 50 transmits the service information from the AF 60 based on the local policy DB The QoS policy can be determined according to the personality of the connection.

Although the present invention has been described in connection with some embodiments thereof, it should be understood that various changes and modifications may be made therein without departing from the spirit and scope of the invention as understood by those skilled in the art. something to do. It is also contemplated that such variations and modifications are within the scope of the claims appended hereto.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 schematically illustrates a configuration of an exemplary mobile communication network in which the present invention may be practiced. FIG.

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a mobile communication system, and more particularly,

3 illustrates a configuration of an authentication message in which connection user information is carried in accordance with an embodiment of the present invention.

4 is a flowchart illustrating a procedure for determining a QoS policy according to an embodiment of the present invention;

5 is a flowchart specifically illustrating an IP-CAN session establishment procedure of FIG. 4 according to an embodiment of the present invention.

6 is a flowchart illustrating a procedure for changing a QoS policy according to an embodiment of the present invention;

7A to 7C are diagrams showing an example of profile configuration of a visitor according to an embodiment of the present invention;

DESCRIPTION OF THE REFERENCE NUMERALS

11 and 12: terminals 21 to 25, 200:

50: ASN gateway 60: AF

70: Indoor base station management system (ACS) 80: Policy server (PCC framework)

201: home user list 202: connection controller

203: EAP encoder 801: EAP decoder

802: Profile manager 803: Subscriber QoS profile

Claims (15)

A mobile communication system, An indoor base station for controlling physical connection of the terminal based on a home user list in consideration of resources when the terminal is connected, encoding the connection control result in an authentication message, and transmitting the authentication result; An authentication server for decrypting the authentication message to confirm the connection control result and configure a quality of service (QoS) profile for each user according to the connection control result upon successful authentication; And And an ASN (Access Service Network) gateway that applies QoS different for each accessor according to a QoS policy determined based on the QoS profile Lt; / RTI > When an application server requests an application service in a state where a session is maintained, the service request is transmitted to an AF (Application Function), and the ASN gateway, which receives the service information from the AF, The mobile communication system according to claim 1, further comprising a function of applying QoS according to a policy. The method according to claim 1, The determined QoS policy is determined by the ASN gateway or requested by the ASN gateway to the policy server through an IP-CAN session establishment process, and is determined by the policy server according to a request from the ASN gateway, Mobile communication system. delete The method according to claim 1, The re-established QoS policy may be determined by the ASN gateway on the basis of the service information of the AF according to the service request of the AF, or may be determined by the policy server based on the service information of the AF and transmitted to the ASN gateway , Mobile communication system. The method according to any one of claims 1, 2, and 4, Wherein the connection control result is connector type information for attempting call connection. 6. The method of claim 5, Wherein the ASN gateway comprises a local policy DB. 6. The method of claim 5, Wherein the authentication message is an Extensible Authentication Protocol (EAP) message transmitted from the terminal. 8. The method of claim 7, Wherein the QoS profile includes an allowable number of service flows per accessor, an allowable service type, and a QoS parameter. 8. The method of claim 7, Wherein the indoor base station is operated in a CSG (Closed Subscriber Group) mode. A QoS (Quality of Service) control method for a femtocell, When the terminal is connected, the indoor base station controls the physical connection of the terminal based on the home user list in consideration of the resource, encodes the connection control result into the authentication message, and transmits the authentication result to the authentication server; The authentication server decodes the authentication message to confirm the connection control result and configures a per-user QoS profile according to the connection control result upon successful authentication; The ASN (Access Service Network) gateway applying different QoS according to the QoS policy determined based on the QoS profile; Transmitting an application service with an application function (AF) when an accessor requests an application service in a state where the accessor maintains a session; And The ASN gateway, which has received the service information from the AF, applies QoS according to the re-established QoS policy based on the service information Gt; 11. The method of claim 10, Wherein the determined QoS policy is determined by the ASN gateway or determined by the policy server according to a request of the ASN gateway through an IP-CAN session establishment process, and delivered to the ASN gateway. delete 11. The method of claim 10, The re-established QoS policy may be determined by the ASN gateway on the basis of the service information of the AF according to the service request of the AF, or may be determined by the policy server based on the service information of the AF and transmitted to the ASN gateway , QoS control method. 14. The method according to any one of claims 10, 11 and 13, Wherein the connection control result is connection type information for which call connection is attempted. 15. The method of claim 14, The ASN gateway includes a local policy DB, The authentication message is an Extensible Authentication Protocol (EAP) message transmitted from the terminal, Wherein the QoS profile includes an allowable number of service flows per accessor, an allowable service type, and a QoS parameter.

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