KR20080080720A - Apparatus and method for providing a quality of service in a mobile communication system - Google Patents

Abstract

The present invention relates to an apparatus and a method for providing quality of service information in an IP multimedia subsystem, and to generate a service information (Service Information) including the type of service to be used in the calling mobile terminal to determine the policy / billing Quality of Service (QoS decision) information and billing determination using the proxy call session function control unit provided as a function and the service type to be used in the calling mobile terminal included in the service information provided from the proxy call session function control unit. A service ID indicating a type of service to be used by the calling mobile terminal, including a policy / charging decision function for generating a PCC rules including charging rules) and providing the generated PCC rules to the packet gateway device. By including a SIP INVITE message, It provides the advantage that the quality of service information and can provide accounting information in accordance with the service group ID.

Description

Apparatus and method for providing a quality of service in a mobile communication system {APPARATUS AND METHOD FOR PROVIDING QUALITY OF SERVICE IN PORTABLE COMMUNICATION SYSTEM}

1 is a diagram showing the configuration of an IMS network providing service quality information according to a service type according to the present invention;

2 is a flowchart illustrating a process for providing service quality information according to a service type in a service quality management system according to an exemplary embodiment of the present invention;

3 is a diagram illustrating a process of providing quality of service information in a mobile communication system according to an exemplary embodiment of the present invention.

The present invention relates to a mobile communication system, and more particularly, to an apparatus and a method for providing quality of service information in an IP Multimedia Subsystem (IMS) network.

With the rapid development of communication technology, it has reached the stage of providing a high-speed data service capable of providing a general voice service as well as a multimedia service such as an e-mail or a still image as well as a moving image by a portable terminal.

The so-called 3rd generation (3G) mobile communication systems supporting both general voice service and packet service include synchronous CDMA 20001x systems and asynchronous Universal Mobile Telecommunication Systems (UMTS). The third generation mobile communication system as described above provides a multimedia service to a portable terminal through interworking with an IMS network and other networks.

The portable terminal capable of interworking with the IMS network and other networks uses a voice data service in a circuit switch network such as a UMTS (Universal Mobile Telecommunication System) (UMTS) and a Global System for Mobile (GSM). In a WLAN environment, a multi-mode portable terminal that can use VoIP services.

The IMS was introduced as a release 5 standard in the 3rd Generation Partnership Project (3GPP), which is a standard research organization of the 3rd generation mobile communication system.

In other words, the IMS is a network for effectively supporting the demand for wireless data and multimedia services in the mobile communication network while supporting the existing voice service as it is.

The process of requesting the service quality information by the portable terminal in the IMS network as described above is the same as the method described below.

The calling mobile terminal to use the IMS service negotiates the quality of service information request with the receiving mobile terminal using a session initiation protocol message.

In this case, the portable terminals can transmit a quality of service requirement using a session description protocol (SDP).

The P-CSCF, which is the contact point of the IMS service, generates a service information using the session description protocol exchanged between the originating portable terminal and the receiving portable terminal and generates a policy / charging function (PCRF). Rule functions).

The policy / charge determination function that receives the service information uses the received service information, the subscriber profile information obtained from the subscriber profile storage unit, and the information included in the request of the GGSN to determine a QoS decision and a charge decision ( Create PCC rules information including charging rules).

Here, the PCC rules information includes information including a type of service authorized to the subscriber provided by the subscriber profile storage unit, service quality information permitted to the subscriber, billing information of the subscriber, and subscriber category, and an application function AF. Information including the IP address, media type and bandwidth of the mobile terminal, application information of the application function, recording information of the application function, and the like, and the IP address of the mobile terminal requested from the GGSN, and subscriber authentication information. It can be generated using the included information.

Thereafter, the policy / billing determination function provides the generated PCC rules information to the GGSN.

Here, the PCC rules may be transmitted using a CC-Answer (CCA) message that includes information including a quality of service class and a maximum bandwidth value for an uplink downlink, and the quality of service class is conversational. (Conversational) service class, streaming service class, interactive service class, and background service class.

The GGSN receiving the PCC rules generates resource allocation and charging information for bearer traffic using the received PCC rules.

However, the above-mentioned mobile communication network allocates resources for session creation using service class information and maximum bandwidth information determined by service information, but does not provide service quality information for a service to be used by a user. .

SUMMARY OF THE INVENTION An object of the present invention is to provide an apparatus and method for providing service quality information according to a type of service when creating a session in an IMS network.

Another object of the present invention is to provide an apparatus and method for providing service quality information using service ID information when creating a session in an IMS network.

According to a first aspect of the present invention for achieving the above objects, an apparatus for providing a quality of service in an IP Multimedia Subsystem (IMS) includes a type of service to be used in a calling mobile terminal. Type of service to be used by the proxy call session function control unit for generating service information and providing it as a policy / billing determining function and the calling mobile terminal included in the service information provided from the proxy call session function control unit. It generates a PCC rules including the quality of service (QoS decision) information and charging rules (Charging rules) information, and comprises a policy / billing decision function for providing the generated PCC rules to the packet gateway device .

According to a second aspect of the present invention for achieving the above object, a method for providing a quality of service in an IP Multimedia Subsystem (IMS) is a service for notifying the type of service to be used by the calling portable terminal; Generating service information including ID, and generating PCC rules including quality of service decision information and charging rule information using the generated service information and subscriber profile. and providing the rules to the packet gateway device.

Hereinafter, the operating principle of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, when it is determined that detailed descriptions of related known functions or configurations may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. Terms to be described later are terms defined in consideration of functions in the present invention, and may be changed according to intentions or customs of users or operators. Therefore, the definition should be made based on the contents throughout the specification.

In the following description, an apparatus and method for providing granular service quality information according to a service type in a mobile communication network will be described.

1 is a diagram illustrating a configuration of a service quality management system for providing service quality information according to a service type according to the present invention.

Referring to FIG. 1, the service quality management system includes a P-CSCF 112, a Policy and Charging Rules Function (PCRF) 114, and a Subscriber Profile Storage (SPR) 116. ) Can be configured to include

First, the calling mobile terminal 100 to use the IP Multimedia Subsystem (IMS) service is called a receiving mobile terminal using a session initiation protocol message (SIP INVITE) message. Negotiate requests for Quality of Service (QoS) information (not shown).

In this case, the portable terminals may transmit a quality of service requirement using a session description protocol (SDP), and a calling mobile terminal that wants to use the IMS service may use a service (eg, a video call) , Video on demand (VoD), push-to-talk (PTT), and the like.

Table 1 below shows, for example, a session initialization protocol invite message used in a mobile communication system according to the present invention. The session initialization protocol invite message is a sender's portable terminal in a conventional session initialization protocol invite message. May include a service to be used.

INVITE tel: + 1-212-555-2222 SIP / 2.0 Via: SIP / 2.0 / UDP [5555 :: aaa: bbb: ccc: ddd]: 1357; comp = sigcomp; branch = z9hG4bKnashds7 Max-Forwards: 70. . . . Service - Identifier : VoD - Sessison . .

Referring to FIG. 3 (a), the session initialization protocol invite message indicates that the calling portable terminal 100 intends to use an on-demand video service using a service ID.

The P-CSCF 112 generates service information using the session description protocol exchanged between the originating portable terminal 100 and the receiving portable terminal to the policy / charge determination function 114. send.

Here, the service information includes a service ID indicating a service to be used by the calling mobile terminal 100, that is, a Service-Identifier header.

In addition, the P-CSCF 112 may deliver the service information to the policy / charge determination function 114 using an AA-Request (AAR) message through an RX interface defined in 3GPP.

Table 2 below shows the AAR message delivered from the P-CSCF 112 to the policy / charging decision function 114 in accordance with the present invention.

<AA-Request> :: = <Diameter Header: 265, REQ, PXY> <Session-Id> {Auth-Application-Id} {Origin-Host} {Origin-Realm} {Destination-Realm} * [Media-Component -Description] * [Flow-Grouping] [AF-Charging-Identifier] [Service-Identifier] [SIP-Forking-Indication] * [Specific-Action] * [Subscription-ID] * [Proxy-Info] * [Route- Record] * [AVP]

As shown in FIG. 3 (b), the AAR message includes a session ID (Session-Id), a source host name (Origin-Host), a source domain (Origin-Realm), a destination domain (Destination-Realm), and media configuration information. Information elements such as (Media-Component-Description), service-group information (Flow-Grouping), charging information (AF-Charging-Identifier), and service ID information included in the session initialization protocol invite message (Service-Identifier) It may include.

In this case, the service information included in the AAR message is information described in the existing technology, and a detailed description thereof will be omitted.

Receiving service information from the P-CSCF 112, the policy / charging decision function 114 uses the service information to generate a PCC rules including quality of service (QoS decision) information and charging rule information. Create

 Here, the policy / charge determination function 114 uses the service information provided from the P-CSCF 112 and the subscriber profile provided from the subscriber information storage 116 to provide the service quality information and the charge determination information. Can be generated.

Table 3 below shows a subscriber profile provided from the subscriber information storage unit 116.

Subscription Profile-Subscriber Category: Gold, Silver, Copper, etc.-Subscriber's allowed QoS-Subscribed guaranteed Bandwidth QoS-[QoS class-Maximum / Guaranteed Bandwidth Rate limit] pairs-Allowed Service List-[Service Identifier-Priority] pairs - PCC rules - Precedence - Service Identifier - QoS : QoS Class , Maximum Bandwidth - Charging Rules : Online / Offline , Metering Method , Rating Group , Reporting Level -Subscriber's charging related information: Charging Server Address, charging rules

Referring to <Table 3>, the subscriber profile provides quality of service class (QoS Class) and bandwidth (Maximum Bandwidth) information provided by the conventional subscriber profile, and the service ID defined in the PCC rules according to the present invention. A service quality class according to information (Service-Identifier) and bandwidth information according to the service ID information are provided.

The policy / charging decision function 114 that generates the PCC rules provides the generated PCC rules to a Gateway GPRS Support Node (GGSN) 120.

Here, the policy / charging decision function 114 transmits using a CCA message (CC-Answer) which is a response message of the CCR message.

Here, when the policy / billing determination function 114 receives the subscriber profile including the PCC rules from the subscriber profile storage 116, the calling party uses the service quality information and the charging information according to the service ID. The service quality information and the charging information for each service type that the mobile terminal intends to use are included in the charging decision definition information (Charging-Rule-Definition) of the CCA message and transmitted to the GGSN 120.

On the other hand, when receiving a CCR message from the GGSN without being associated with an Application Function (AF), the prescribed service of the CCA message using the quality of service class and bandwidth information (Subscriber's allowed QoS) provided by the conventional subscriber profile It is included in the quality information element (Authorized QoS) and transmitted to the SSGN (120).

Thereafter, the GGSN 120 generates resource allocation and charging information for bearer traffic using the PCC rules of the CCA message provided from the policy / charging decision function 114.

That is, the GGSN 120 performs resource allocation using the information when the quality of service information specified in the CCA message is included and charges the message when the quality information specified in the message is not included. Resource allocation is performed using decision definition information.

The above has described the IMS network providing the service quality information according to the service type, and in the following description, a method for providing the service quality information according to the service type according to an embodiment of the present invention will be described.

2 is a flowchart illustrating a process for providing service quality information according to a service type in a service quality management system according to an exemplary embodiment of the present invention.

Referring to FIG. 2, the service quality management system 110 first checks whether a service quality providing event occurs in step 201. If the event does not occur, the service quality management system proceeds to step 413 to perform a corresponding function (eg, standby mode).

If the event occurs, the service quality management system 110 proceeds to step 203 and instructs the P-CSCF 112 to generate service information. Here, the P-CSCF 112 received the instruction of the quality of service management system 110 through a session initiation protocol byte (SIP INVITE) message used by portable terminals (called terminal, originating terminal) supporting the IMS service. The type of the service to be used by the calling mobile terminal may be checked and generated by including the type of the checked service (service ID, that is, Service-Identifier header).

In step 205, the service quality management system 110 provides the generated service information to a policy / charging rules function (PCRF) 114.

Thereafter, the service quality management system 110 proceeds to step 207 to instruct the policy / charge determination function 114 to determine quality of service (QoS decision) information and charging rule information.

The policy / charge determination function 114 instructed by the quality of service management system 110 receives the service information received from the P-CSCF 112 and the subscriber profile stored in the subscriber information storage (SPR) 116. Create PCC rules including quality of service (QoS) decision information and charging decision (Charging rules) information.

In operation 209, the quality of service management system 110 transmits the PCC rules to the GGSN for causing a Gateway GPRS Support Node (GGSN) to generate resource allocation and charging information for bearer connection. After the transmission, the algorithm ends.

3 is a diagram illustrating a process of providing quality of service information in a mobile communication system according to an exemplary embodiment of the present invention.

Referring to FIG. 3, the portable terminal 301 first performs a service initiation request using a session initiation protocol invite message.

The P-CSCF 303 which has received a service start request from the portable terminal 301 generates service information using the message. Thereafter, the P-CSCF 301 provides the generated service information to a policy and charging rules function (PCRF) 305.

The policy / charge determination function 305 which has received the service information from the P-CSCF 303 receives the subscriber profile from the subscriber information storage 307 and sends it to the packet gateway device (GGSN) 309. A policy / billing decision rule to be provided is generated and the generated policy / billing decision rule is provided to the GGSN.

The GGSN 309 performs resource allocation for bearer connection by using the policy / charging decision rule provided from the policy / charging decision function 305, and then terminates the present algorithm.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the scope of the following claims, but also by the equivalents of the claims.

As described above, by including the service ID indicating the type of service to be used by the calling portable terminal as the present invention, the session initiation protocol byte message (SIP INVITE) message, providing the service quality information and billing information according to the service ID It offers the advantage of being able to.

Claims (8)

In the device for providing a quality of service in IP Multimedia Subsystem (IMS), A proxy call session function control unit for generating service information including a service ID indicating a type of service to be used by the calling mobile terminal and providing the service information as a policy / charge determination function; Generating PCC rules including quality of service (QoS decision) information and charging decision information of a service type to be used in the originating portable terminal included in the service information provided from the proxy call session function controller; And a policy / charge determination function for providing the generated PCC rules to the packet gateway device. The method of claim 1, The policy / charge determination function is And generate the PCC rules by using the service information received from the proxy call session function control unit and the subscriber profile provided from the subscriber profile storage unit. The method of claim 2, The policy / charge determination function is When receiving a subscriber profile including quality-of-service (QoS decision) information and charging rules information from the subscriber profile storage unit, quality of service (QoS decision) information and charging rules (Charging rules) information for each service type And generate the PCC rules reflecting the characteristics of the service to be used by the calling mobile terminal. The method of claim 3, wherein The policy / charge determination function is When receiving a CCR message from the packet gateway device without association with an application function (AF), the service quality class and bandwidth information (Subscriber's allowed QoS) provided by the subscriber profile are transmitted as a response message of the message. Device. The method of claim 4, wherein The packet gateway device, When the PCC rules using the quality of service (QoS decision) information and the charging decision (Charging rules) information for each type of service is provided from the policy / charge determination function, resource allocation is performed using the quality information for each type of service. Device. In the method for providing a quality of service in IP Multimedia Subsystem (IMS), Generating service information including a service ID indicating a type of service to be used by the calling mobile terminal; Using the generated service information and the subscriber profile to generate PCC rules including quality of service (QoS decision) information and charging decision information, and providing the generated PCC rules to the packet gateway device. Characterized in that the method. The method of claim 6, The process of generating the PCC rules including the quality of service (QoS decision) information and charging rules (Charging rules) information, When receiving a subscriber profile including quality decision (QoS) decision information and charging rules information, the caller is portable using the quality of service (QoS decision) information and charging rules (Charging rules) information. And generating the PCC rules reflecting the characteristics of the service to be used by the terminal. The method of claim 6, The process of generating the PCC rules including the quality of service (QoS decision) information and charging rules (Charging rules) information, When receiving a CCR message from a packet gateway device without association with an application function (AF), generating the PCC rules using a quality of service class and bandwidth information (Subscriber's allowed QoS) provided by a subscriber profile. Method comprising a.

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