KR101016634B1 - Communication system and method for providing qos service to wireline customer premises equipment using ims network - Google Patents

Abstract

The present invention relates to a communication system and a method for providing a QoS service to a wired subscriber station using an IMS network. To this end, the present invention receives the session configuration information from the PCRF (Policy and Charging Rule Function), the wired user terminal to determine the PCC (Policy and Charging Control) rules to be applied to the requested call from the wired user terminal and the corresponding session Upon receiving the progress message, a network for connecting the P-CSCF (Proxy-Call Session Control Function), which transmits application information and service information to the PCRF, and a wired user terminal and an IMS (IP Multimedia Subsystem) network, and sets the determined PCC rule. A communication system comprising a matching gateway and a method thereof are provided.

IMS, network matching gateway

Description

COMMUNICATION SYSTEM AND METHOD FOR PROVIDING QOS SERVICE TO WIRELINE CUSTOMER PREMISES EQUIPMENT USING IMS NETWORK}

The present invention relates to a communication system and a method for providing a QoS service to a wired user terminal using an IMS network.

Recently, an IMS (IP Multimedia Subsystem) network that performs IP-based communication has been used as a communication network.

Subscribers can use non-real-time services such as file transfer, email, and short message as well as real-time services such as voice and video through IMS network.

The system for supporting QoS in the IMS of the conventional wireless communication user terminal is composed of AF (Application Function or P-CSCF), PCRF (Policy Charging Rule Function), PCEF (Policy Charging Enforcement Function or GGGSN). Through such a configuration, it is possible to apply QoS to a wireless communication user terminal using an IMS service.

Recently, subscribers joining IMS in order to use IMS server in a wired terminal are increasing.

However, the wired user terminal cannot provide a PDP context to the IMS when establishing a call by accessing the IMS network, thereby providing a QoS service to the wired user terminal.

An object of the present invention is to propose a communication system and method for providing a QoS service to a wired subscriber station using an IMS network capable of providing QoS when the wired subscriber station uses the IMS service.

According to an aspect of the present invention, the PCRF (Policy and Charging Rule Function) for determining a PCC (Policy and Charging Control) rule to be applied to the requested call from the wired user terminal; A proxy-call session control function (P-CSCF) which transmits application information and service information to the PCRF upon receiving session establishment information from the wired user terminal and a corresponding session progress message; And a network matching gateway that connects the wired user terminal to an IMS (IP Multimedia Subsystem) network and sets the determined PCC rule.

According to another aspect of the present invention, in a method for providing a Quality of Service (QoS) in a network matching gateway when a call is requested from a wired user terminal, (a) receiving session establishment information according to a call request from the wired user terminal Transmitting the session establishment information to a proxy-call session control function (P-CSCF); (b) if the session establishment completion information is received from the P-CSCF in response to the session establishment information, transmitting PCC rule request information to a policy and charging rule function (PCRF); And (c) there is provided a wired subscriber station QoS service providing method using an IMS network comprising the step of setting the PCC rule by receiving the PCC rule determined in the PCRF.

According to the present invention, a communication system for providing a QoS service to a wired subscriber station using an IMS network capable of providing QoS when the wired subscriber station uses the IMS service uses a network matching gateway. There is an advantage to provide.

In addition, a communication system for providing a QoS service to a wired subscriber station using an IMS network that can provide QoS when the wired subscriber station uses the IMS service according to the present invention can set PCC rules for each service, There is an advantage in that bandwidth can be allocated for each service requested.

As the invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all transformations, equivalents, and substitutes included in the spirit and scope of the present invention. In the following description of the present invention, if it is determined that the detailed description of the related known technology may obscure the gist of the present invention, the detailed description thereof will be omitted.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, the same reference numerals will be used for the same means regardless of the reference numerals in order to facilitate the overall understanding.

Prior to the detailed description of the drawings, it is intended to clarify that the division of the components in the present specification is only divided by the main function of each component. That is, two or more components to be described below may be combined into one component, or one component may be provided divided into two or more for each function. Each of the components to be described below may additionally perform some or all of the functions of other components in addition to the main functions of the components, and some of the main functions of each of the components are different. Of course, it may be carried out exclusively by. Therefore, the presence or absence of each component described through this specification should be interpreted functionally.

1 is a system configuration diagram illustrating a communication system for performing QoS call processing of an IMS network wired subscriber according to an embodiment of the present invention.

Referring to FIG. 1, a communication system includes a wired user terminal 100, a network matching gateway 200, a policy and charging rule function (PCRF) 300, and a proxy-call session control function (P-CSCF) 500. It may include a Subscription Profile Repository (SPR) 400 and an Online Charging Server (OCS) 600. In the exemplary embodiment of the present invention, the present invention may be applied to both the case of using one PCRF and the case of using a plurality of PCRFs. Hereinafter, a case of using one PCRF will be described for convenience of description.

The wired user terminal 100 is a terminal that performs a session establishment procedure with a communication system and transmits and receives packet data. The wired user terminal 100 may include a computer, a notebook, an IP phone, a video phone, and the like. The wired user terminal may operate in a packet switched (PS) domain or a circuit switched (CS) domain.

The network matching gateway 200 may manage subscriber information and location information of the wired user terminal 100. The network matching gateway 200 is responsible for session management and billing information generation. The network matching gateway 200 is connected to a wired network (eg, a router) through an interface to transmit and receive packet data and control messages. The network matching gateway 200 has a session management, authentication and billing function, and a packet processing routing function for processing an incoming / outgoing signal processing procedure and a packet data transmission / reception of the wired user terminal 100.

The network matching gateway 200 may manage QoS of the IMS. In order to manage the QoS of the IP Multimedia Subsystem (IMS), the network matching gateway 200 performs control and QoS management for user plane traffic handling. That is, for the service data flow under policy control, the network matching gateway 200 allows the service data flow to pass only when the corresponding gate is open. In addition, for the data flow under billing control, the service data flow can pass through the network matching gateway 200 only if there is a corresponding policy and charging control (PCC) rule.

The PCC rule is for detecting a packet belonging to a service data flow and applying an authorized QoS. PCC rules include a dynamic PCC rule and a basic PCC rule. The dynamic PCC rule is a PCC rule applied by the PCRF 300, and the basic PCC rule is a PCC rule preset in the network matching gateway 200. The basic PCC rule can be activated or deactivated by the PCRF 300. PCC rules include rule name, service identifier, service data flow filter, priority, gate state, QoS parameter, charging key, charging parameter. Among them, the QoS parameter is information about authorized QoS (QoS Class Indicator), and includes bit rate applied for uplink and downlink. QoS class is composed of Conversational class, Streaming class, Interactive class and Background class. In the present embodiment, the basic PCC rule is designated as a background class. Background class is the lowest level of the four classes, the wired user terminal 100 may use a service that can not expect the packet to arrive within a certain time.

PCRF 300 includes a flow based on policy control decisions and charging control functions. The PCRF 300 performs network control such as service data flow detection and QoS. The PCRF 300 receives the session information and the media information from the AF 500, and notifies the AF 500 of the event of the traffic plane. To this end, the PCRF 300 determines the PCC rule and sets it in the network matching gateway 200. Information necessary to determine the PCC rule for each service is provided from the AF 500. The information provided from the AF 500 is session, media, and subscriber information, and the information provided from the network matching gateway 200 is a request format and subscriber information.

The P-CSCF 500 is a system for providing an IP-based service and corresponds to an application function (AF). In this embodiment, an IMS will be described. AF is configured only in P-CSCF (Proxy-CSCF) of CSCF.

The P-CSCF is a point where the wired user terminal 100 meets when accessing the IMS domain through the access network, and transmits a SIP REGISTER from the wired user terminal 100 to the I-CSCF. The S-CSCF establishes a call session and plays a role of receiving and processing a Session Initiation Protocol (SIP) message transmitted from a user terminal.

SPR 400 is a server that stores QoS information. The SPR 400 is interworked with the PCRF 300 and provides the PCRF 300 with corresponding information when the QoS information is requested by the PCRF 300.

Online Charging Server (OCS) 600 is a server responsible for the session-based charging function, and is responsible for the online charging of the network or subscriber session.

2 is a flowchart illustrating a process of setting a basic PCC rule from a PCRF in a network matching gateway.

Referring to FIG. 2, the wired user terminal 100 transmits a register message SIP REGISTER to the network matching gateway 200 (S100). The register message (SIP REGISTER) is a SIP message and may be a message for location registration, call call, or service use request in the wired user terminal 100. The register message SIP REGISTER may include subscriber information and QoS request information of the wired user terminal 100.

The network matching gateway 200 transmits a PCC rule request message (Request Policy & Charging rules) to the PCRF 300 in order to set a basic PCC rule (S110).

The PCRF 300 may request and receive profile information from the SPR 400 (S120 and S130). The profile information includes available services and QoS. Here, steps (S120 and S130) are not mandatory procedures and may not be performed in some cases.

PCRF 300 determines the PCC rules and policies (S140). The PCRF 300 may select or generate a PCC rule. In addition, the PCRF 300 may determine a policy as to whether to activate or deactivate service flows defined in the allowed QoS and PCC rules. The PCRF 300 may then store the determined PCC rules and policies.

The PCRF 300 transmits the determined PCC rules and policies to the network matching gateway 200 (S150). Through this, the QoS is delivered to the network matching gateway 200.

When the network matching gateway 200 receives the PCC rule determined by the PCRF 300, the network matching gateway 200 stores the received PCC rule as a basic PCC rule (S160). The network matching gateway 200 applies the applied QoS and activates or deactivates the service flow according to the flow state of the PCC rule.

The network matching gateway 200 transmits a credit request message to an online billing server (OCS), and receives a response message from the OCS (S170 and S180). Thereafter, the network matching gateway 200 transmits a register message SIP REGISTER to the P-CSCF 500 (S190). Thereafter, the wired user terminal 100 registers the location.

3 is a flowchart illustrating a process of setting a PCC rule for each service according to an exemplary embodiment of the present invention.

As shown in FIG. 3, the wired user terminal 100 transmits a session establishment message (SIP INVITE) to the network matching gateway 200 in order to establish a call setup, that is, a session with the called terminal (S210).

The network matching gateway 200 receiving the session establishment message (SIP INVITE) from the wired user terminal 100 transmits the session establishment message (SIP INVITE) to the P-CSCF 500 of the originating IMS network (S220).

The P-CSCF 500 receiving the session establishment message (SIP INVITE) transmitted by the network matching gateway 200 transmits the session establishment message (SIP INVITE) to the S-CSCF of the originating IMS network.

Then, the session establishment message (SIP INVITE) is transmitted to the called party via the I-CSCF, S-CSCF, P-CSCF of the destination IMS network. Here, the session establishment message (SIP INVITE) may include QoS information required by the wired user terminal 100.

Upon receiving the session progress message 183, which is a response message corresponding to the session establishment message (SIP INVITE), the P-CSCF 500 transmits application information and service information to the PCRF 300 (S230 and S240). . Upon receiving the application information and the service information, the PCRF 300 transmits a response corresponding to the application information and the service information to the P-CSCF 500 (S250). At this time, the P-CSCF 500 transmits the session progress message 183 through the network matching gateway 200, and the network matching gateway 200 receives the session progress message 183 received from the P-CSCF 500. ) Is transmitted to the wired user terminal 100. Here, the application information and the service information may include QoS information requested when the session establishment request is made by the wired user terminal 100.

Subsequently, the P-CSCF 500 receives a 200 OK, which is a session establishment success message, from the called terminal (S260). That is, 200 OK received from the incoming IMS network is transmitted to the network matching gateway 200 via the S-CSCF and P-CSCF of the originating IMS network, and the network matching gateway 200 to the wired user terminal 100. 200 OK (S270, S280).

When the network matching gateway 200 receives the session establishment success message 200 OK, the PCC rule request message is transmitted to the PCRF 300 (S290).

The PCRF 300 may compare the QoS through the PCC rule request message with the application information and the service information previously received from the P-CSCF 500 (S300). That is, the PCRF 300 analyzes the QoS of the IMS through the QoS included in the PCC rule request from the network matching gateway 200 and the application information and service information received from the P-CSCF 500, and the wired user terminal ( 100 or the resource (eg, bandwidth) to be allocated to the network matching gateway 200.

The PCRF 300 may transmit an event occurrence report message to the P-CSCF 500 (S310). When the P-CSCF 500 receives the event occurrence report message, the P-CSCF 500 transmits a corresponding response message (ACK) or new application information and service information to the PCRF 300 (S320). Here, steps S310 and S320 may be omitted in some cases.

The PCRF 300 makes a policy decision and transmits a message to define the PCC rule to the network matching gateway 200 (S340).

The network matching gateway 200 sets the PCC rule determined by the PCRF 300 (S350). Accordingly, the network matching gateway 200 may provide QoS to the wired user terminal 100 using the IMS network.

The network matching gateway 200 transmits a credit request message to an online billing server (OCS), and receives a response message from the OCS 600 (S360 and S370). Thereafter, the network matching gateway 200 transmits a response message (ACK) to the 200 OK to the P-CSCF 500 (S380). The P-CSCF 500 transmits an ACK to the calling network (S390).

The method for performing QoS call processing in an IMS network of a wired subscriber station according to an embodiment of the present invention may be implemented in the form of program instructions that can be executed by various computer means and recorded in a computer readable medium. Computer-readable media may include, alone or in combination with the program instructions, data files, data structures, and the like.

The program instructions recorded on the computer readable medium may be those specially designed and constructed for the present invention, or may be known and available to those skilled in the computer software arts. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical media such as CD-ROMs, DVDs, and magnetic disks, such as floppy disks. Hardware devices specially configured to store and execute program instructions such as magneto-optical media and ROM, RAM, flash memory and the like. In addition, the above-described medium may be a transmission medium such as an optical or metal wire, a waveguide, or the like including a carrier wave for transmitting a signal specifying a program command, a data structure, and the like. Examples of program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like.

The hardware device described above may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It will be understood that the invention may be varied and varied without departing from the scope of the invention.

1 is a system configuration diagram illustrating a communication system for performing QoS call processing of an IMS network wired subscriber according to an embodiment of the present invention.

2 is a flowchart illustrating a process of setting a basic PCC rule from a PCRF in a gateway.

3 is a flowchart illustrating a process of setting a PCC rule for each service according to an exemplary embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

100: wired user terminal

200: network matching gateway

300: PCRF

400: SPR

Claims (8)

A Policy and Charging Rule Function (PCRF) for determining a Policy and Charging Control (PCC) rule to be applied to a call requested from a wired user terminal; A proxy-call session control function (P-CSCF) which transmits application information and service information to the PCRF upon receiving session establishment information from the wired user terminal and a corresponding session progress message; And And a network matching gateway which connects the wired user terminal to an IMS network and sets the determined PCC rule. The method of claim 1, The PCRF determines a PCC rule through quality of service (QoS) information included in application information and service information received from the P-CSCF and PCC rule request information received from the network matching gateway. system. The method of claim 2, The PCC rule request information includes QoS information required by the wired user terminal. The method of claim 1, The communication system further comprises a subscription profile storage unit for providing the profile information corresponding to the profile information request from the PCRF. A method for providing a quality of service (QoS) in a network matching gateway when a call is requested from a wired user terminal, (a) transmitting the session establishment information to a proxy-call session control function (P-CSCF) when receiving session establishment information according to a call request from a wired user terminal; (b) if the session establishment completion information is received from the P-CSCF in response to the session establishment information, transmitting PCC rule request information to a policy and charging rule function (PCRF); And and (c) receiving the PCC rule determined by the PCRF and setting the PCC rule to provide the QoS service to the wired subscriber station using the IMS network. The method of claim 5, Before step (b) above, Receiving a session establishment progress message from the P-CSCF, the wired subscriber station using the IMS network further comprising the step of transmitting the application information and application service information from the Subscription Profile Repository (SPR) storing the QoS information to the PCRF To provide QoS services. The method of claim 6, The PCRF is When receiving the application information and application service information, and receives the session establishment completion information corresponding to the session configuration information from the P-CSCF, Comparing the QoS included in the application information and the application service information and the QoS contained in the policy and charging control (PCC) rule request information. The method of claim 1, wherein the QoS service is provided to the wired subscriber station using the IMS network. The method of claim 6, Before step (a) Transmitting an initial PCC request message for initial PCC rule setting to the PCRF when receiving a location registration message from the wired user terminal at the network matching gateway; Determining an initial PCC rule in accordance with the information included in the location registration message in the PCRF; And Receiving and setting the determined initial PCC rule; providing a QoS service to a wired subscriber station using an IMS network.

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