KR101231740B1 - Apparatus and method for controlling route and resource in Packet-Optic convergence network - Google Patents

Abstract

The present invention relates to a path and a resource control method in a packet-optical integrated network, wherein the method of a resource approval control system provides packet transport layer (PTL) path information between edge devices of a packet-optical network through a path management system. After receiving a request, and in response to the resource reservation, change and release request of the service control system to process the resource reservation, change, release operation, monitor the resource usage status of each PTL path, and according to the resource usage situation of each PTL path By managing the PTL path or the amount of resources allocated to the PTL path through the management system, it is possible to provide a more stable quality premium IP service.

Packet-to-optical network, PTL path, PTL path, IP premium service

Description

{Apparatus and method for controlling route and resource in Packet-Optic convergence network}

TECHNICAL FIELD The present invention relates to a path and resource control technology in a packet-optical integrated network. In particular, the present invention relates to a path in a packet-optical integrated network that can more stably provide a quality guaranteed IP premium service by dynamically changing paths and resources. And a resource control method.

The present invention is derived from the research conducted as part of the IT new growth engine core technology development project of the Ministry of Knowledge Economy and the Ministry of Information and Communication Research and Development. [Task management number: 2008-S-010-01, Title: Multi-layer optical network control platform Technology development].

Packet-optical integrated network is a network composed of POINTS (Packet-Optical Integrated Network Transport Switch) equipment, which is a packet-optical integrated switch, and refers to a next-generation transport network including layers 0 through 4 in transmission.

At this time, POINTS equipment uses PTL (Packet Transport Layer) tunneling technology for 1.5 layer transmission. The PTL technology is similar to the L2 tunneling technology of the existing PBB-TE or MPLS-PE, but instead of simply loading an IP packet into a tunnel, it identifies a service session flow and transmits only IP premium service traffic on a PTL path.

The network operator sets up the optical paths of the 0th and 1st layer of transmission between the POINTS devices, and then sets the PTL path thereon.

The PTL path is a logical path that divides and defines bandwidth resources of an optical path, and is a path established between edge-edge devices of a packet-optical integrated network. The PTL path guarantees the transmission quality of IP premium service traffic, and may be configured and operated in multiple services for the same edge-edge interval.

Since IP premium services require various transmission qualities according to types, by setting individual PTL paths that satisfy the corresponding transmission qualities, various service session flows can be carried on an appropriate PTL path.

However, in the related art, a technique for controlling a path and resources for guaranteeing transmission quality of IP premium service traffic has not been proposed yet.

Meanwhile, next generation networks (NGNs) or broadband communications networks (BcNs) provide dynamic resource approval control based on the ITU-T RACF (Resource Access Control Facility) standard.

The RACF system determines whether to use resources for IP service sessions based on network paths and resources pre-assigned by a network management station (NMS) or provisioning server, and can guarantee the transmission quality of service session traffic. If there is not enough resources in the path, it will refuse to reserve resources for the service session.

As the number of resource reservation rejections for a specific path resource increases, it is difficult to provide a smooth service. Therefore, the network operator should always grasp the resource operation status of the path and take appropriate measures.

That is, the RACF system developed so far determines whether to approve or reject the use of a resource reservation request for a service session within the limit of path resources set by the network operator through a separate path setting system.

Therefore, in the RACF system according to the prior art, it is impossible to automatically change the path resource after it is allocated, and it is inconvenient for the network operator to change the path resource manually by grasping the resource usage situation.

Therefore, in the present invention, it is possible to automatically control the PTL path and resources without the intervention of the network operator, so that the path in the packet-optical integrated network that can reliably guarantee the transmission quality of IP premium service traffic in the packet-optical integrated network And a resource control method.

According to the first aspect of the present invention, as a means for solving the above problems, the path and resource control method of the resource approval control system provided in the packet-optical integrated network, the edge of the packet-optical network through the path management system Receiving packet transport layer (PTL) path information between devices; Monitoring resource usage for each PTL path while processing resource reservation, change, and release operations in response to a resource reservation, change, and release request of the service control system; And changing the amount of resources allocated to the PTL path or the PTL path through the path management system according to the resource usage situation for each PTL path, wherein the amount of resources allocated to the PTL path or the PTL path is changed. The step may include increasing or decreasing the resource allocation of the corresponding PTL path based on the resource usage ratio of the resource allocation for each PTL path, and deleting or additionally setting the corresponding PTL path based on the resource utilization of each PTL path. .

The step of changing the PTL path or the amount of resources allocated to the PTL path may include increasing a resource quota for a PTL path having a higher resource utilization rate than a resource quota, and reducing a resource quota for a PTL path having a low resource utilization rate relative to a resource quota. In this case, the PTL path whose resource usage rate is lower than the reference value is deleted and the PTL path whose resource usage rate is higher than the reference value is additionally set.

The method may further include updating the PTL path information by reflecting a result of resource change processing of the path management system.

According to a second aspect of the present invention, as a means for solving the above problems, the path and resource control method of the path management system provided in the packet-optical integrated network, PTL (PTL) between the edge equipment of the packet-optical integrated network Providing a PTL path information to a resource approval control system after establishing a packet transport layer) path and allocating resources; And changing an amount of a resource allocated to a PTL path or a PTL path in response to a resource change request of the resource approval control system, wherein the amount of resource allocated to the PTL path or the PTL path is changed. The step of increasing or decreasing the resource allocation of the corresponding PTL path based on the resource usage ratio of the resource allocation for each PTL path, and characterized in that the step of deleting or additionally setting the corresponding PTL path based on the resource usage rate of each PTL path.

The method may further include informing the resource approval control system of the PTL path or the result of the change processing of the resource allocated to the PTL path.

As such, the path and resource control apparatus in the packet-optical integrated network of the present invention may periodically monitor the resource usage of all PTL paths without intervention of the network operator, and automatically control the PTL path and resource according to the monitoring result. Make sure This enables consistent quality calibrated IP premium service traffic transmission without service delays or interruptions caused by path resource changes.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, in describing in detail the operating principle of the preferred embodiment of the present invention, if it is determined that the detailed description of the related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

In order to clearly illustrate the present invention, parts not related to the description are omitted, and like parts are denoted by similar reference numerals throughout the specification.

Also, when a part is referred to as "including " an element, it does not exclude other elements unless specifically stated otherwise.

1 is a block diagram of a path and resource control apparatus in a packet-optical integrated network according to an embodiment of the present invention.

Referring to Figure 1, the packet-optical integrated network resource control apparatus of the present invention is composed of a POINTS 10, a path management system 20, a resource approval control system 30, and a service control system 40.

The POINTS device 10 is an edge device constituting the packet-optical integrated network. The POINTS device 10 additionally sets a PTL path in addition to the optical paths of the transmission layer 0 and layer 1, and guarantees the transmission quality of IP premium service traffic through the PTL path. .

The path management system 20 establishes an optical path and a PTL path between the POINTS devices 10 and allocates resources such as bandwidth for each path and tunnel. In addition, in response to the resource change request of the resource approval control system 30, the specific PTL path is additionally set or released, or the resource allocated to the specific PTL is increased or decreased.

The resource approval control system 30 collects PTL path information through the path management system 20 and reserves, changes, and releases service session resources of the service control system 40 such as 3GPP IMS based on the collected PTL path information. Process the request. In this case, the PTL path information includes edge-edge device address for each PTL path, path bandwidth, and IP subnet address assigned to the path.

In addition, the resource approval control system 30 periodically monitors the resource usage status of all PTL paths, and analyzes the use status of each PTL path. After the resource change request is made to the path management system 20 based on the PTL path resource usage statistics information analyzed for a certain period of time, the PTL path information is updated according to the resource change processing result of the path management system 20.

2 is a flowchart illustrating a resource control method in a packet-optical integrated network according to an embodiment of the present invention.

First, the path management system 20 sets an optical path and a PTL path between the POINTS devices configuring the packet-optical integrated network, and performs an initialization process of allocating resources to all network paths (S1).

When the initialization process of step S1 is successfully completed, the resource admission control system 30 receives and collects PTL path information from the path management system 20 (S2).

In this state, when the service control system 40 requests resource reservation for providing service sessions such as IPTV, VoIP, and VoD (S3), the resource admission control system 30 determines that the service session is based on the PTL path information. A PTL path capable of guaranteeing transmission quality is determined and its resources are identified (S4). If the corresponding PTL path has enough resources, the resource reservation for the service session is approved, and the resource reservation that is not otherwise denied (S5).

The resource admission control system 30 periodically grasps the resource usage status of all PTL paths while performing the resource admission control procedure of steps S4 and S5, and collects and analyzes resource usage statistics information (S6).

As a result of the determination in step S6, if the resource count of the specific PTL path is insufficient and the number of rejections for resource reservation is increased above the reference value, the resource admission control system 30 sends more resources to the path management system 20 in the corresponding PTL path. Allocate the allocation and request resource reduction for PTL paths with low resource utilization. In addition, the request for release of the path for the PTL path with a resource usage rate lower than or equal to the reference value for a predetermined period, and the request for additional setting of the path for the PTL path that is higher than the reference value (S7).

In response to the resource change request of the resource admission control system 30, the path management system 20 performs a resource change such as increasing or decreasing a resource allocated to a specific PTL path or adding or deleting a specific PTL path. (S8), and notifies the resource admission control system 30 of the result of the resource change processing (S9).

Then, the resource admission control system 30 updates the PTL path information according to the result of the resource change processing, so that the next resource admission control procedure is performed based on the updated PTL path information (S10).

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and it is common in the art that various substitutions, modifications, and changes can be made without departing from the technical spirit of the present invention. It will be apparent to those skilled in the art.

1 is a block diagram of a path and resource control apparatus in a packet-optical integrated network according to an embodiment of the present invention.

2 is a flowchart illustrating a resource control method in a packet-optical integrated network according to an embodiment of the present invention.

Claims (5)

A path and resource control method of a resource approval control system provided in a packet-optical integrated network, Receiving packet transport layer (PTL) path information between edge devices of a packet-optical network through a path management system; Monitoring resource usage for each PTL path while processing resource reservation, change, and release operations in response to a resource reservation, change, and release request of the service control system; And Changing the amount of resources allocated to the PTL path or the PTL path through the path management system according to the resource usage situation for each PTL path; Herein, the changing of the amount of resources allocated to the PTL path or the PTL path may include increasing or decreasing the resource allocation of the corresponding PTL path based on the resource usage ratio of the resource allocation for each PTL path, and based on the resource usage rate of the PTL path. The path and resource control method of the resource approval control system, which is a step of deleting or additionally setting the corresponding PTL path. The method of claim 1, wherein changing the PTL path or the amount of resources allocated to the PTL path comprises: Increase the resource quota for PTL paths with higher resource utilization to resource quotas, reduce resource quotas for PTL paths with less resource utilization, and delete PTL paths with resource utilization below the baseline, and use resource utilization above the baseline. The path and resource control method of the resource approval control system, characterized in that the PTL path is additionally set. 3. The method of claim 2, And updating the PTL path information by reflecting a result of the resource change processing of the path management system. In the path and resource control method of the path management system provided in the packet-optical integrated network, Providing a PTL path information to a resource approval control system after establishing a packet transport layer (PTL) path between edge devices of the packet-optical integrated network and allocating resources; And Changing a PTL path or an amount of resources allocated to the PTL path in response to a resource change request of the resource approval control system, Herein, the changing of the amount of resources allocated to the PTL path or the PTL path may include increasing or decreasing the resource allocation of the corresponding PTL path based on the resource usage ratio of the resource allocation for each PTL path, and based on the resource usage rate of the PTL path. The path and resource control method of the path management system, which is a step of deleting or additionally setting the corresponding PTL path. 5. The method of claim 4, And notifying the resource approval control system of a PTL path or a result of the change processing of resources allocated to the PTL path.

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