KR100520047B1 - Architecture for providing the operator policy-based in the All-IP Net and thereof method - Google Patents

Abstract

The present invention relates to a network structure and a QoS parameter resource authentication method for service provision and quality assurance based on an operator policy in an IMT-2000 All-IP network.

When providing services to subscribers of IMT-2000 All-IP network, it is not good in terms of network efficiency to unilaterally accommodate all subscriber's needs. Therefore, there is a need to provide a service that is most efficient and satisfies the requirements of subscribers according to various information such as subscriber information and current network status, time, receiver, and other surrounding conditions.

Accordingly, according to the present invention, there is provided a network structure for providing a service to a service provider based on a policy of an operator and guaranteeing quality to an All-IP subscriber, comprising: a user equipment (UE) for a user to access network services; A gateway GPRS support node (GGSN) located between the GPRS backbone network and an external packet data network for converting packets transmitted from SGSN into PDP format and forwarding them to the other packet data network; A proxy call state control device (P-CSCF) having a policy control function element (PCF) and a local policy information server (LPIS) for forwarding requests from the user equipment (UE) to an I-CSCF or S-CSCF. )Wow; A home policy information server (HPIS) for constructing a policy of the entire network as a database; And a network policy setting center and an interface for policy management, and configured as a general policy operator control center (GPOCC) for monitoring current network status, and LDAP is used as an interface between the HPIS, LPIS, and PCF. We propose a network structure for service provision and quality assurance based on operator policy in All-IP network.

Description

Architecture for providing the operator policy-based in the All-IP Net and concerned method for providing service and guaranteeing quality based on the operator policy in the AICS-IP network

The present invention relates to a network structure and a QoS parameter resource authentication method for service provision and quality assurance based on an operator policy in an IMT-2000 All-IP network.

In IMT-2000, subscribers subscribed to IP Multimedia Subsystem (IMS), an All-IP domain, must undergo QoS authentication through P-CSCF.

At this time, in order to provide the most efficient and satisfying subscriber's requirements in various environments such as subscriber information, current network status, time, recipient, and other surrounding conditions, a suitable QoS is provided to subscribers through a policy server. You should be able to allocate it. Since the current IMT-2000 standard does not satisfy these requirements, the present invention intends to propose an All-IP network structure for satisfying this requirement.

When providing services to subscribers of IMT-2000 All-IP network, it is not good in terms of network efficiency to unilaterally accommodate all subscriber's needs. Therefore, there is a need to provide a service that is most efficient and satisfies the requirements of subscribers according to various information such as subscriber information and current network status, time, receiver, and other surrounding conditions.

In other words, when mapping an authorized IP QoS parameter from an SDP parameter as in the current standard, it is difficult to use an efficient network simply by using only a few of the SDP parameters.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a network which can satisfy network efficiency and user's requirements in terms of a communication service provider through interaction between the network components and components that have not been proposed in the related art. To present the structure and method.

As the technical idea for achieving the above object of the present invention

In the network structure for providing service to all-IP subscribers and ensuring quality based on the operator's policy,

A user equipment (UE) for the user to access network services;

A gateway GPRS support node (GGSN) located between the GPRS backbone network and an external packet data network for converting packets transmitted from SGSN into PDP format and forwarding them to the other packet data network;

A proxy call state control device (P-CSCF) having a policy control function element (PCF) and a local policy information server (LPIS) for forwarding requests from the user equipment (UE) to an I-CSCF or S-CSCF. )Wow;

A home policy information server (HPIS) for constructing a policy of the entire network as a database; And

It provides an interface for policy setting and policy management at the network level, and comprises a general policy operator control center (GPOCC) for monitoring the current network status.

In the All-IP network, LDAP is used as an interface between the HPIS, the LPIS, and the PCF, thereby providing a network structure for service provision and quality assurance based on an operator policy.

Hereinafter, with reference to the accompanying drawings, the configuration and operation of the embodiment of the present invention will be described in detail.

1 is an overall structure diagram of an All-IP network for applying an operator policy according to the present invention.

In the network structure proposed in the present invention, a general policy operator control center (GPOCC), a home policy information server (HPIS), and a local policy information server may be added in addition to the functional elements defined in the existing standard. (LPIS: Local Policy Information Server), each of which can apply an operator policy by performing the functions described below.

A user equipment (UE) 100 is a device for a user to access a network service. Mainly means a mobile terminal. This includes the SIP Client 110, the IP BS Manager 120, the UMTS BS Manager 130, and the like.

A Gateway General Packet Radio Service (GGSN) Support Node (GGSN) 200 is located between the GPRS backbone network and an external packet data network. Packets delivered from the Serving GPRS Support Node (SGSN) are converted to the appropriate Packet Data Protocol (PDP) format through the GGSN and sent to the other packet data network. Conversely, a packet from an external packet data network goes through the reverse.

This includes an IP BS Manager 210 and a UMTS BS Manager 220 equipped with a Policy Enforcement Point (PEP) 212, a DiffServ 214, and a Gate function 216.

Meanwhile, GGSN has an IP BS Manager, which is a service based local policy enforcement point. The functions of the IP BS Manager are described below.

The Proxy Call State Control Function (P-CSCF) 300 is the first access point of the UE 100 and is in the P-CSCF discovery process after PDP context activation. The P-CSCF address found by the user can access it.

The primary role is to forward requests from user devices to Interrogating-CSCF (I-CSCF) or Serving-CSCF (S-CSCF). In particular, it has a Policy Control Function (PCF) 320 and a Local Policy Information Server (LPIS) 310 that serve as policy management.

The IP BS Manager (Internet Protocol Bearer Service Manager) 120,210 is an element that uses a standard IP mechanism for handling the IP Bearer Service, which may be different from the mechanism or parameter used in the Universal Mobile Telecommunications System (UMTS). The Translation / Mapping Function provides inter-working that maps the mechanisms and parameters used in the UMTS Bearer Service to those used in the IP Bearer Service. In the GGSN 200, UMTS QoS parameters may be mapped to IP QoS parameters, and in the UE 100, QoS requirements determined from an application layer may be mapped to IP QoS parameters.

The IP BS Manager may or may not be present in both the UE 100 or the GGSN 200.

The Policy Control Function (PCF) 320 is a logical policy decision point (PDP) that uses standard IP mechanisms to implement policies in the IP bearer layer. The PCF 320 uses policy rules to make decisions based on network-based IP policies and communicates with the IP BS Manager 210 of the GGSN 200, which is an IP Policy Enforcement Point (PEP).

The PCF 320 is mainly described as a logical element of the P-CSCF 300, and may actually implement the PCF and the P-CSCF separately. The PCF 320 performs a policy decision based on the information obtained from the P-CSCF, in which the parameters of the application layer are mapped to IP QoS parameters in the PCF.

The Home Policy Information Server (HPIS) 400 is a database that stores policies of the entire network. The PCF 320 accesses the home policy information server to obtain policy information when an authentication request is received from the GGSN 200 or when a conversion from an SDP parameter to an authenticated IP QoS parameter is required.

In the current standard, the PCF 320 performs QoS mapping only with SDP parameter information. However, when the network structure proposed in the present invention is used, the PCF 320 performs QoS parameter conversion according to the policy obtained after communicating with the home policy server. It can provide differentiated services.

The General Policy Operator Control Center (GPOCC) 500 is a component that defines network-level policies. It provides an interface for policy setting and policy management, and monitors the current network status. Network operators use this for efficient network use and service differentiation for each subscriber.

The policy determined by the general policy operator control center is later stored in the home policy information server (HPIS), and any local policy information server (LPIS) may download and store the policy stored in the home policy information server. The PCF 320 may convert the SDP parameters into Authorized IP QoS parameters based on the policies stored in the general policy operator control center or the local policy information server.

Local Policy Information Server (LPIS) 310 is any policy information server for backing up policy information of a home policy server. If the P-CSCF 300 has a local policy information server, the PCF 320 will communicate with the local policy information server to obtain policy information. Otherwise, the PCF 320 will communicate with the home policy information server.

In the above structure, the interface between the HPIS 400, the LPIS 310, and the PCF 212 uses a Lightweight Directory Access Protocol (LDAP).

2 is a flowchart illustrating a QoS resource authentication process in an originating PCF.

1. The PCF 320 receives the SDP parameters defined by the sender and checks necessary connection information, that is, information such as an IP address of a downlink media flow and a media port to be used.

2. The PCF 320 receives the SDP parameters negotiated from the receiver through the SIP signaling action. The PCF 320 also identifies the necessary connection information, such as the IP address of the uplink media flow and the media port to use.

3. The PCF 320 sends a Policy Information Request message to the LPIS 310 to obtain policy information necessary for QoS resource authentication.

4. The LPIS 310 receiving the Policy Information Request message transmits the corresponding policy information to the PCF 320.

5. The PCF 320 uses the SDP parameter and the policy information received from the LPIS 310 for QoS resource authentication. Authentication is expressed in IP QoS parameters. An authentication token is generated by the PCF 320 and passed to the UE 100.

In FIG. 2, the Policy Information Download process and the Policy Information Update process operate independently of the call origination process. That is, the Policy Information Download process occurs to inform LPIS of the changed policy information when the policy information stored in HPIS is changed. Policy Information Update is a process of changing policy information of HPIS through GPOCC.

3 is a flowchart illustrating a QoS resource authentication process in a receiving PCF.

1. The PCF 320 receives the SDP parameters defined by the receiver and checks necessary connection information, that is, information such as an IP address of an uplink media flow and a media port to be used.

2. The PCF 320 receives the negotiated SDP parameters from the sender via the SIP signaling action. In addition, the PCF 320 checks necessary connection information such as an IP address of a downlink media flow and a media port to be used.

3. The PCF 320 sends a Policy Information Request message to the LPIS 310 to obtain policy information necessary for QoS resource authentication.

4. The LPIS 310 receiving the Policy Information Request message transmits the corresponding policy information to the PCF 320.

5. The PCF 320 uses the SDP parameter and the policy information received from the LPIS 310 for QoS resource authentication. Authentication is expressed in IP QoS parameters. An authentication token is generated by the PCF 320 and passed to the UE 100.

In FIG. 3, as in FIG. 2, the Policy Information Download process and the Policy Information Update process operate independently of the call origination process. That is, the Policy Information Download process occurs to inform LPIS of the changed policy information when the policy information stored in HPIS is changed. Policy Information Update is a process of changing policy information of HPIS through GPOCC.

Policy information is entered through GPOCC. In other words, if the operator wants to change the database information of HPIS through GPOCC. The policy information includes the following condition information.

1. Media Type: Indicates the media type of the session. It can have values of Audio, Video, Application, Data, Control.

2. Sender / Receiver: Shows the sender and receiver of the current session. It has the form user@company.com.

3. Bandwidth: Shows the bandwidth required by the session.

4. Transport Address: Shows transport layer of session. It has the value of RTP, UDP, TCP.

5. Time: Shows which day of the week or which time of day.

6. Network Condition: Shows the current network congestion level. It may have a value of High, Middle, and Low.

The policy information defines the following actions that can be taken when the above conditions are met:

1. Priority: You can give priority to a call.

2. Accepted: Accept or reject the call.

3. DiffServ PHB: Assign a specific value to the PHB field of DiffServ.

For example, if the operator wants to set the priority according to the media type, GPOCC provides database information of HPIS. Priority = 1 if the media type is Control, Priority = 2 for Audio and Video, Priority = 3 for Application, Data If is set to Priority = 4. Then, when a call request occurs, an appropriate priority is assigned according to the media type of the call, and the differential service is provided.

If a service provider wants to provide a high priority service to a particular sender or receiver, enter the corresponding sender / recipient in the sender and receiver fields, for example, chairman@company.com, and enter 1 in the Priority field. Priority service will be available. Even if the service provider wants to give a high priority in case of a call requiring high bandwidth, the policy information may be set in the above manner.

Therefore, if the policy information is set in the above manner, whether and whether to accept the call depending on the media type of the call, who is the sender / receiver, what is the Transport Address, when is the current time, and what the current network condition is The operator can set how to assign the Priority or DiffServ PHB value.

As described above, according to the present invention, it is possible to satisfy the network efficiency and the user's requirements in terms of the communication provider through the interaction of the network components and components that have not been presented in the prior art.

That is, IMT-2000 All-IP subscribers can efficiently provide services that meet subscriber's requirements according to subscriber information and various environments such as current network status, time of day, recipient, and other surrounding conditions based on the operator's policy. And the quality can be guaranteed accordingly.

1 is an overall structure diagram of an All-IP network for applying an operator policy according to the present invention.

2 is a flowchart illustrating a QoS resource authentication process in an originating PCF according to the present invention.

3 is a flowchart illustrating a QoS resource authentication process in a receiving PCF according to the present invention.

<Description of Symbols for Major Parts of Drawings>

100: user equipment (UE)

200: Gateway GPRS support node (GGSN: Gateway General Packet Radio Service (GPRS) Support Node)

300: Proxy Call State Control Function (P-CSCF)

400: Home Policy Information Server (HPIS)

500: General Policy Operator Control Center (GPOCC)

Claims (7)

In the network structure for providing service to all-IP subscribers and ensuring quality based on the operator's policy, A user equipment (UE) for the user to access network services; A gateway GPRS support node (GGSN) located between the GPRS backbone network and an external packet data network for converting packets transmitted from SGSN into PDP format and forwarding them to the other packet data network; A proxy call state control device (P-CSCF) having a policy control function element (PCF) and a local policy information server (LPIS) for forwarding requests from the user equipment (UE) to an I-CSCF or S-CSCF. )Wow; A home policy information server (HPIS) for constructing a policy of the entire network as a database; And It provides an interface for policy setting and policy management at the network level, and comprises a general policy operator control center (GPOCC) for monitoring the current network status. Network structure for service provision and quality assurance based on operator policy in All-IP network, characterized in that LDAP is used as an interface between HPIS, LPIS and PCF. The service provider of claim 1, wherein the UE and the GGSN further include an IP BS Manager, and the IP BS Manager is present in each of the UE and the GGSN or not in each of the UE and the GGSN. Network structure for policy-based service delivery and quality assurance. The method according to claim 2, wherein in the GGSN, UMTS QoS parameters are mapped to IP QoS parameters, and in the UE, QoS requirements determined from an application layer are mapped to IP QoS parameters. Network structure for service delivery and quality assurance. The method of claim 1, wherein the PCF provided in the P-CSCF is based on the policy stored in the GPOCC or LPIS to provide the service based on the operator policy in the All-IP network, characterized in that for converting the SDP parameters into the authenticated IP QoS parameters And network structure to ensure quality. A user equipment (UE); Gateway GPRS Support Node (GGSN); A proxy call state control device (P-CSCF) having a policy control function element (PCF) and a local policy information server (LPIS); Home policy information server (HPIS); And QoS resource authentication method in outgoing and receiving PCF for providing service to all-IP subscribers satisfying subscriber's requirements and ensuring quality in network structure equipped with general policy operator control center (GPOCC) To Receiving the SDP parameters defined by the sender (or receiver) in the PCF and confirming necessary connection information; Receiving a negotiated SDP parameter from a receiver (or sender) via a SIP signaling action; Sending a policy information request message to the LPIS to obtain policy information necessary for QoS resource authentication; Transmitting policy information corresponding to the policy information request message to a PCF; Providing policy information received from SDP parameter and LPIS for QoS resource authentication as IP QoS parameter, and providing service based on operator policy in All-IP network including delivering authentication token generated by PCF to UE. Resource certification method to ensure quality. The method of claim 5, wherein the PCF checks an IP address of a forward or reverse media flow and information of a media port to be used. 6. The method of claim 5, wherein the policy information includes a media type, a sender, a receiver, a bandwidth, a transport address, a time, a network state, and the like. And resource certification methods to ensure quality.