KR20080052846A - Method for netork resource managing of multimedia services in broadband converged network - Google Patents

Abstract

A method for managing the network resources of multimedia services in a broadband convergence network is provided to enable a resource authentication control server to collect LSP resources, allocate an available bandwidth to each service, and compare available resources with required resources to determine whether the required resources are available, thereby performing the authentication and control of resources for multi-service applications in an integrated network. A transmission resource controller(108) of a resource authentication control server(106) requires and collects LSP(Label Switched Path) resources set in a network from an MPLS(Multi-Protocol Label Switching) network device(104). A network manager(102) allocates LSP bandwidth resources to each service(118). A service control server(112) requires resource authentication(120). A policy determination unit(110) refers to the transmission resource controller for determining whether resources are available(122). The transmission resource controller searches an LSP set between two routers on the collected LSP resources and determines whether bandwidth resources by service are available(124).

Description

METHOD FOR NETORK RESOURCE MANAGING OF MULTIMEDIA SERVICES IN BROADBAND CONVERGED NETWORK}

1 is a flowchart illustrating a network resource management procedure according to a preferred embodiment of the present invention;

2 is a diagram illustrating a structure of an MPLS network for performing network resource management according to an embodiment of the present invention;

3 is a flowchart illustrating an operation procedure of a resource approval control server according to a preferred embodiment of the present invention.

The present invention relates to a resource management technology in a multi-protocol label switching (MPLS) -based broadband integrated network, and in particular, to various quality of service (QoS) guaranteed IP ( Internet Protocol) relates to a network resource management method for resource admission control of a multimedia service.

The MPLS network switches by attaching a separate label to the data packet instead of the IP address, and performs routing with the label instead of the existing IP address. Therefore, in the general network, the data packet goes up to layer 3 and then routes, whereas in the MPLS network, the router 2 can perform switching at high speed by referring to the label of the packet. That is, switching is performed by configuring a Label Switched Path (hereinafter referred to as LSP) having an explicit path between an ingress router and an egress router. This MPLS network is a traffic separation technology, which is mainly applied to a virtual private network (VPN), and shows QoS support and excellent scalability that existing IP cannot support.

The resource management method in the conventional MPLS network as described above deals with resource management in a dedicated network for a specific IP service (for example, Voice over IP (VoIP) service). In such a private network, when a call server requests a resource management device to reserve a network resource, the resource management device searches a resource management database (DB) to determine the path through which the traffic will pass and check whether there is an available resource on the path. Was to determine the availability of the reservation request.

However, with the development of network technology, the concept of Broadband Converged Network (BCN), which supports various IP multimedia services through one integrated network, has been introduced. Therefore, there is a need for a resource management method to support multiple multimedia services. However, there was no solution.

The present invention is to overcome the above-mentioned limitations of the prior art, a method for managing network resources of a multimedia service in a broadband integrated network capable of managing network resources for resource admission control of various QoS-guaranteed IP multimedia services in a broadband integrated network. The purpose is to provide.

Another object of the present invention is to divide and manage physical resources (bandwidth) into logical resources (bandwidth) for each service in order to transmit various QoS-guaranteed IP multimedia service traffic through one integrated network. The present invention provides a method for managing network resources of a multimedia service in a broadband integrated network capable of processing a resource approval request.

In one aspect of the present invention, a method for managing network resources of a multimedia service in a multi-protocol label switching (MPLS) -based broadband converged network, the method comprising: collecting label switching path (LSP) information in the MPLS network; Extracting bandwidth resource information, dividing the bandwidth resource into a plurality of service bandwidth resources, and managing LSPs, and when receiving a resource approval request message for a specific service from the service control server, grasping the LSP to be used for the requested resource; And determining whether the bandwidth resource for the specific service is available, and transmitting the determined response message of the availability of the specific service resource to the service control server.

The present invention is to perform network resource management for resource admission control of various QoS-guaranteed IP multimedia services in MPLS-based broadband converged network. Resource availability status of each service for resource use approval request of multiple service control server in resource approval control server This is to determine whether to approve the use of resources.

Various QoS-guaranteed IP multimedia service applications, such as Voice over IP (VoIP), Video on Demand (VoD), and Tele-conference services, first establish a service session to exchange multimedia information between end users. The service session is established by sending a signaling message, such as a Session Initiation Protocol (SIP), to the service control server that the service initiator requests to establish a service session between end users.

Therefore, when the service control server receives a request for establishing a service session from the service initiator, it is an action to ensure the transmission quality of service for the service traffic before opening the session. Ask for approval. One service control server exists for each service application. In a broadband integrated network, a service control server and a resource admission control server have a many-to-one relationship.

That is, a service control server and a resource admission control server of many-to-one relationship are required to guarantee transmission QoS for various IP multimedia service traffic in one integrated delivery network. The service control server exists for each service application, and the resource admission control server exists for each management network.

In order to perform the resource usage request and approval process for establishing a service session in the resource admission control server, it is necessary to collect LSP (Label Switched Path) resources as network resources, and allocate and manage available bandwidth for each service for the collected resources. . Subsequently, when the LSP resource collection is completed, the service control server receives an authorization request for resource use and processes the resource. When receiving the resource approval request message for establishing the service session, the resource admission control server determines which incoming router in the management network enters and leaves which outgoing router.

Once the incoming and outgoing routers are identified, the LSP established between the two routers can be found, and the bandwidth resources allocated for the service can be known from the total bandwidth resources of the LSPs. By subtracting the bandwidth resources currently in use from the LSP bandwidth resources allocated for one service, the available bandwidth resources can be calculated. If the available bandwidth resources are larger than the requested resources, the resource usage request is accepted. Conversely, if the available bandwidth resource is less than the requested resource, the request is rejected.

If the resource usage request is approved, the resource admission control server increases the usage service bandwidth of the corresponding LSP by the requested bandwidth. On the contrary, when receiving a release request for a user resource from the service control server, the resource admission control server reduces the used service bandwidth of the LSP by the returned bandwidth.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention. Like parts are designated by like reference numerals throughout the specification.

1 is a diagram illustrating a method for collecting and managing network resources for resource admission control of various QoS-guaranteed IP multimedia services in an MPLS-based broadband integrated network according to an embodiment of the present invention, and for determining resource availability when requesting resource approval. A flowchart illustrating the procedure.

Referring to FIG. 1, the transmission resource controller 108 of the resource admission control server 106 requests and collects LSP resources set in the network from the MPLS network equipment 104 in step 114. The transmission resource control unit 108 uses a simple network management protocol (SNMP) or a command line interface (CLI) to collect LSP resources. The collected LSP resource information includes an LSP name, an LSP ID, an incoming router address, an outgoing router address, a network address (group of IP subnet addresses transmitted through the LSP), and bandwidth.

When the LSP resource collection is completed, the network manager 102 manages the physical LSP bandwidth resources by dividing logical service resources. For example, when the bandwidth of the LSP is 1 Gbps, the VoIP service bandwidth may be allocated as 200 Mbps, the VoD service bandwidth as 500 Mbps, and the tele-conference service bandwidth as 300 Mbps. Alternatively, the network manager 102 may set the bandwidth for each service on the transmission resource controller 108 in advance so that the network manager 102 may be set automatically without the network manager 102 being assigned.

For service resource information managed separately for each service application, service allocation bandwidth and service use bandwidth information are added to the LSP resource information. For example, if the service bandwidth is allocated to 200 Mbps among the LSP resources for the VoIP service, and the current service use bandwidth is 150 Mbps, the available bandwidth resource is 50 Mbps and the resource use request required within this range can be accepted. have.

When resource collection and service-specific allocation are completed, the resource admission control server 106 may process a resource approval request received from the service control server 112. The resource approval request transmitted from the service control server 112 is received by the policy decision unit 110 in the resource approval control server 106, and the policy decision unit 110 determines whether the resource is available by using the transmission resource controller ( Inquire 104). The transmission resource controller 108 determines which incoming router in the management network to go to which outgoing router based on the service session information included in the resource availability inquiry request message. When the incoming and outgoing routers are identified, the LSPs established between the two routers are found on the LSP resources collected in step 124. In step 126, the availability of the corresponding service bandwidth resources is determined.

If the bandwidth resource requested in step 128 is less than the available bandwidth resource, the transmission resource controller 108 increases the amount of used bandwidth resource by the requested resource in step 130 and then transmits an OK response to the policy decision unit 110 in step 132. The policy decision unit 110 transmits an approval response message for the requested resource to the service control server 112.

However, if the available bandwidth resources are insufficient, the NOT_OK response is transmitted to the policy decision unit 110 in step 138. In response to the NOT_OK response received from the transmission resource controller 108, the policy determination unit 110 transmits a resource rejection response message to the service control server 112 in step 140.

2 is a diagram illustrating a structure of an MPLS network for performing network resource management according to an exemplary embodiment of the present invention.

Referring to FIG. 2, one MPLS management network 210 establishes an LSP 212 between an incoming and an outgoing router according to an operation policy of a network manager. Application service traffic can flow from any point in the management network and out at any point, thereby establishing the LSP 212 path between all routers that make up the edge of the management network.

The resource admission control server 202 is composed of a transmission resource control unit 204 and a policy determination unit 206. The policy decision unit 206 interacts with various service control servers 201-x, and processes resource approval requests sent from these servers. If the service control server 201-x makes an approval decision on the requested resource use, the policy decision unit 206 may control the router as necessary.

The transmission resource control unit 204 collects the physical LSP bandwidth resources from the MPLS network equipment 210 to transmit various QoS-guaranteed IP multimedia service traffic through one transmission network, divides them into bandwidth resources for each service, and then provides resources for each service. Determining whether the availability is available to pass to the policy decision unit 206. Thereafter, the policy determination unit 206 transmits the resource availability approval information received from the transmission resource control unit 204 to the service control server 208-x.

3 is a flowchart illustrating an operation procedure of a resource approval control server according to an exemplary embodiment of the present invention.

Referring to FIG. 3, in step 302, the resource approval control server collects LSP resources from the MPLS network to perform a resource use request and approval process for establishing a service session. In step 304, the LSP resources collected from the MPLS network are collected. Storage and management are performed, and service-specific bandwidth allocation for the LSP resources collected in step 306 is performed.

In step 308, if the resource admission control server receives an approval request message for the use of a specific service resource sent from the service control server, in step 310, the resource admission control server determines which path the service traffic is routed based on the resource approval request message. In operation 312, the LSP determines whether the requested resource is available, that is, the bandwidth resource allocated for the service, from among the entire bandwidth resources of the found LSP.

This is to determine whether the requested resource is available by comparing the available resource with the requested resource. The available resource calculates the available resource by subtracting the currently used bandwidth resource from the LSP bandwidth resource allocated for one service. If the resource is greater than or equal to the requested resource, the flow proceeds to step 314 to increase the used service bandwidth of the LSP by the requested bandwidth, and then transmits a service acknowledgment response message for the requested resource to the service control server in step 316. do.

However, if the available bandwidth resources are less than the requested resources in step 312, the flow proceeds to step 318 and transmits a rejection response message for the requested resources to the service control server.

As described above, the present invention divides and manages physical resources into logical resources for each service in order to transmit various QoS-guaranteed IP multimedia service traffic through one integrated network, thereby managing resource grant requests requested by different service applications. Process.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible 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 defined not only by the scope of the following claims, but also by those equivalent to the scope of the claims.

In the present invention operating as described in detail above, the effects obtained by the representative ones of the disclosed inventions will be briefly described as follows.

The present invention proposes a network resource management method for resource admission control of various QoS-guaranteed IP multimedia services in an MPLS-based broadband integrated network, thereby controlling resource admission for multiple service applications in one integrated network instead of the existing dedicated network for each service. There is an effect that can make it possible.

Claims (3)

A method for network resource management of multimedia services in a multi-protocol label switching (MPLS) -based broadband integrated network, Collecting label switching path (LSP) information in the MPLS network; Extracting bandwidth resource information from the LSP information and dividing the bandwidth resource into a plurality of service bandwidth resources; When the resource approval request message for the specific service is received from the service control server, determining whether the requested resource is to be used and determining whether the bandwidth resource for the specific service is available; Transmitting the determined availability message of the specific service resource to the service control server; Network resource management method of a multimedia service in a broadband integrated network comprising a. The method of claim 1, The determining process, Calculating an available service bandwidth resource by calculating a difference between a service bandwidth resource allocated in the LSP resource and a service bandwidth resource currently used; When the calculated available service bandwidth resource is greater than or equal to the requested specific service bandwidth resource, transmitting a resource acknowledgment message to a service control server; If the calculated available service bandwidth resource is less than the requested specific service bandwidth resource, transmitting a resource rejection response message to a service control server Network resource management method of a multimedia service in a broadband integrated network further comprising. The method of claim 2, The method, And if the calculated available service bandwidth resource is greater than or equal to the requested specific service bandwidth resource, increasing or decreasing the amount of bandwidth resource being used in the LPS by the requested resource amount.

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