KR100649302B1 - ATM Connection Management Methodology to Guarantee Internet Quality Of Service - Google Patents

Abstract

The present invention provides a virtual path connection control methodology capable of satisfying the service quality of the Internet network in the transmission of multimedia traffic (voice, data, video) transmitted / received through the Internet network, and the service quality of the Internet network. The present invention relates to a virtual path connection reconfiguration method for continuously guaranteeing service quality by recognizing this in advance, if any.

The present invention is to be useful for transmitting a large amount of multimedia traffic while satisfying the quality of service in an asynchronous transmission mode communication network to provide a multimedia (voice, video, data) communication service through the Internet network. To do this, use an asynchronous transport network as a backbone network, connect the routers that make up the internet network using the virtual path connection of the asynchronous transport mode backbone network, and configure the internet network. This type of network configuration is referred to as a client / server network relationship. do. The asynchronous transmission mode network becomes the server network of the internet network and the internet network becomes the client network of the asynchronous transmission mode network.

Internet service quality

Description

Asynchronous Connection Mode Connection Management Method for Guaranteeing Internet Network Quality of Service {ATM Connection Management Methodology to Guarantee Internet Quality Of Service}

1 is a diagram illustrating a client / server network relationship between an internet network and an asynchronous transmission mode network employed in the configuration and operation of the present invention.

2 is a diagram schematically illustrating an internet network management system and an asynchronous transmission mode network management system performing management functions for an internet network and an asynchronous transmission mode network.

3 is an asynchronous transmission mode network shape in which the asynchronous transmission mode network shape and data that can express the quality of service on the link are defined.

4 is a diagram illustrating a routing table structure and possible routing paths according to data representing a quality of service between transmission / reception points of FIG. 3 adopted in the configuration and operation of the present invention.

FIG. 5 is a diagram illustrating a routing table constructed for possible connection reconfiguration between the transmit / receive points of FIG. 3 employed in the construction and operation of the present invention, and a routing path selected according to data representing quality of service.

6 is a diagram illustrating interaction between an internet network management system and an asynchronous transmission mode network management system.

<Description of Symbols for Main Parts of Drawings>

(I-1): Internet Network Management System

(I-2): Configuration Management Module of Internet Network Management System

(I-3): Fault Management Module of Internet Network Management System

(I-4): Performance Management Module of Internet Network Management System

(A-1): Asynchronous Transmission Mode Network Management System

(A-2): Configuration management module of asynchronous transmission mode network management system

(A-3): Performance management module of asynchronous transmission mode network management system

(A-4): Fault Management Module of Asynchronous Transmission Mode Network Management System

(A-5): Connection management module of asynchronous transmission mode network management system

The present invention relates to an asynchronous transmission mode connection management method for guaranteeing Internet network quality of service. More particularly, the present invention relates to a quality of service of an internet network in the transmission of multimedia traffic (voice, data, video) transmitted and received through the internet network. Asynchronous to guarantee Internet network quality of service to continuously guarantee the quality of service by continuously reconstructing virtual path connection by recognizing the virtual path connection control and the service quality of the Internet network which may or may degrade. The present invention relates to a transmission mode connection management method.

In general, it is important to satisfy the service quality in the transmission of multimedia traffic (voice, video, data) in the Internet network in which the demand increases exponentially with the spread of the Internet service. The internet network lacks a methodology for satisfying service quality. On the other hand, asynchronous mode transmission network is a network that can satisfy the quality of service.

However, the conventional Internet network has a network system that does not receive the quality of service when the multimedia traffic provided by the asynchronous mode transmission network has a problem that cannot provide a stable and continuous Internet service.

Accordingly, the present invention has been made to solve the above-mentioned problems, and connects each router of the Internet network using an asynchronous transfer mode virtual path connection (VPC), that is, asynchronous transfer mode network backbone network It aims to satisfy the service quality when transmitting multimedia traffic by using the quality of service of asynchronous transmission mode in internet network by constructing internet network.

On the other hand, the present invention for achieving the above object is a method for configuring the Internet network with an asynchronous transmission mode network as a backbone network, the Internet network configuration in the asynchronous transmission mode network management system at the request of the Internet network management system Providing a virtual path connection capable of satisfying the requested quality of service; And detecting a performance degradation and a failure on a link of the internet network connected by the virtual path connection provided in the first step, and reconfiguring the virtual path connection in the asynchronous transmission mode network management system at the request of the internet network management system. Characterized by consisting of two processes.

The first process includes the steps of: a) requesting an asynchronous transmission mode system by specifying an endpoint and bandwidth of a main router to be connected in the Internet network management system, an allowable cell delay deviation, and an allowable cell transmission delay; b) the asynchronous transmission mode system received in step (a) calculating all possible routing paths between designated transmission / reception points; C) when the routing path calculation is completed in step (b), calculating a service quality representative index of bandwidth, allowable cell delay deviation, and allowable cell transmission delay for each routing path and determining priority for each routing; ; d) selecting a routing path that satisfies the quality of service by the priority determined in step (c); And e) terminating the zero endpoint information value provided by the asynchronous transmission mode network management system after the routing path is selected in step (d) to form an internet network link between routers.

The second process includes the steps of: a) recognizing a deterioration in service quality of a link between routers of an internet network and requesting a connection reconfiguration for a virtual path connection corresponding to the degraded link to an asynchronous network management system; b) configuring according to network shape information maintaining a routing path between designated transmission / reception points in an asynchronous transmission mode management system according to the connection reconfiguration request in step (a); c) calculating a bandwidth, cdv, ctd quality of service representative index for each routing configured in step (b); And d) reconfiguring the virtual path connection according to the routing path having the highest priority by giving priority to the quality representative index calculated in step (c).

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in the example of FIG. 1, an asynchronous transmission mode communication network serves as a backbone network and all routers of the internet network form an internet network connected through an asynchronous transmission mode virtual path connection. Each network has a network management system as shown in FIG. The Internet network is managed by the Internet network management system (I-1), and their functions are largely related to the configuration management module (I-2), links, and routers that configure and manage the routers constituting the Internet network and the links between them. It consists of a performance management module (I-4) that is in charge of performance measurement and a failure management module (I-3) that monitors and handles failures on links and routers. The asynchronous transmission mode backbone network is managed by an asynchronous transmission mode network management system (A-1), which is a configuration management module (A-2) that manages the backbone network configuration, and the capability to manage the performance of the switches and the links between them. Management module (A-3), failure management module (A-4) that identifies fault conditions on switches and links, and takes necessary actions, and creates, deletes, and asynchronous transfer mode virtual path connections (VPCs); It consists of a connection management module (A-5) that performs the termination.

The shape management module I-2 of the Internet network management system I-1 plays a role of configuring and managing Internet network shape information as shown in FIG. 2. In order for the configuration management module (I-2) of the Internet network management system to configure a link between routers of the Internet network, a virtual path connection setting is made to the connection management module (A-5) of the asynchronous transmission mode network management system (A-1). When the request is made and the virtual path connection is successfully established by the connection management module A-5, the configuration management module I-2 of the Internet network management system sets the virtual path connection set by the connection management module A-5. Configure the internet network by configuring links between routers.

Meanwhile, specific operations when establishing, canceling, and changing a virtual path connection that can satisfy service quality when transmitting / receiving multimedia traffic through the Internet network are as follows.

First, the connection management module (A-5) of the asynchronous transmission mode network management system (A-1) requests for configuration of the internet network by a request of the configuration management module (I-2) of the internet network management system (I-1). In order to provide a virtual path connection that can satisfy the quality of service, and to recognize in advance the situation where performance is degraded or fail on the link of the configured Internet network and take necessary measures, the quality of service is always provided to Internet service users. It is intended to define a set of methods to ensure that two methods are supported by the following configuration and operation.

In order to satisfy the quality of service, the network configuration management module (I-2) of the Internet network management system (I-1) uses the endpoints (transmission / reception points) and bandwidth (BW :) of two routers to be connected. Connection Management Module for Asynchronous Transfer Mode System (A-1) by specifying Bandwidth), allowable Cell Delay Variance (CDV) and allowable Cell Transfer Delay (CTD) Ask (A-5) (IS-1).

The connection management module A-5, which has received a request for establishing an asynchronous transmission mode virtual path connection (VPC), refers to the configuration management module A-2 which maintains the network shape and link information as shown in FIG. All possible routing paths between the designated transmission / reception points are calculated as shown in FIG. 4 (IS-2).

Therefore, when the routing path calculation is completed, the bandwidth, CDV, and CTD for each routing path are calculated as illustrated in FIG. 4. The bandwidth calculation selects the smallest bandwidth among the link bandwidths existing on the routing path as the QS representative value, and the CDV and CTD represent the sum of all CDVs and CTDs on the link as the respective QS representative values. Choose. Therefore, in FIG. 4, the quality of service bandwidth index on the first routing path is selected as 5 of link 2, which is the least bandwidth among 5 of link 2 and 40 of link 7.

In the same case, CDV sets the sum of 1 of link 2 and 1 of link 6 to 2 as the CDV quality of service representative index of the first routing path, and in the same case the CTD sums 0.5 of link 2 and 2 of link 6 Set 2.5 to the CTD quality of service representative index of the first routing path.

After calculating the bandwidth, CDV, and CTD service quality representative indexes for all routing paths existing between the transmission / reception points by this method, the configuration management module (I-) of the Internet network management system (I-1) is calculated. In 2), if the bandwidth is 5, the CDV is 3, and the CTD is 2, the connection management module (A-5) of the asynchronous transmission mode network management system (A-1) requests the establishment of a virtual path connection. Therefore, the priority of each routing path is determined.

delete

1) Exclude the routing path exceeding the bandwidth, CDV, and CTD requested by the configuration management module (I-2) of the Internet network management system from the bandwidth, CDV, and CTD service quality representative indexes.

2) If there is a routing path that satisfies the bandwidth and CDV CTD requested by the shape management module (I-2), priority is determined according to the following rules.

A) In the bandwidth service quality representative index on the routing path, the bandwidth specified by the configuration management module (I-2) of the Internet network management system is reduced by the bandwidth, and the routing path having the largest remaining bandwidth has the highest priority.

B) If at least one routing path with the same bandwidth remaining in step “a” exists, the routing path with the lowest CDV has the highest priority.

C) If more than one path with the same CDV exists in process "B", the path with less CTD is given higher priority.

D) If a result of performing steps "a" and "process" or "b" exists, the first path on the routing table as shown in FIG. 4 is allocated first.

That is, when a routing path that satisfies the quality of service is selected by the above method, the connection management module A-5 controls the asynchronous transmission mode switch existing on the selected routing path to establish a connection, and establishes a connection identifier and the amount of connection. Provide endpoint information (Virtual Path Identifier: VPI) to the configuration management module (I-2) of the Internet network management system (I-1) (IS-3).

The configuration management module (I-2) receiving the connection and connection endpoint information established from the asynchronous transmission mode network management system terminates the connection endpoint information (VPI) values provided by the asynchronous transmission mode network management system to the two routers. It configures internet network link to satisfy service quality.

The internet network management system and the asynchronous transmission mode network management system perform the above process repeatedly to construct an internet network that can satisfy the service quality. As the number of subscribers increases and the demand for multimedia traffic increases, the quality of service for router-to-router links of a predetermined Internet network may decrease. Since the router-to-router link of the Internet network corresponds to the virtual path connection of the asynchronous transmission mode network, the service quality degradation of the router-to-router link of the Internet network is a failure management module (I-3) of the Internet Management System (I-1). Or a performance management module (I-4), and when the failure management module (I-3) or the performance management module (I-4) recognizes a deterioration in the quality of service, the asynchronous network management system (A-). Request the connection management module (A-5) of 1) to reconfigure the connection for the virtual path connection corresponding to the link which is expected to degrade the quality of service or degrades the quality of service in the Internet network (IP-1, IF-1). .

The connection management module (A-5) of the asynchronous transmission mode network management system that is requested to reconfigure the connection to the Internet network management system maintains the routing path between the transmission / reception points specified in FIG. 3 in the configuration management module (A-2). Configure according to the network shape information (IF-2 / IP-2) and perform reconfiguration on the connection according to the method illustrated in FIG.

delete

Fig. 4, which is the routing table used when the initial virtual path connection was established, and Fig. 5, which is a newly created routing table for request reconfiguration by the request to the Internet network management system when the quality of service is expected to be degraded due to failure or performance degradation. In comparison, since the CDV, which had a priority of 1 in FIG. 4, was changed to 5 in FIG. 5, the routing path whose priority was 2 in FIG. 4 was excluded when the connection reconfiguration was excluded, and the priority was 1 in FIG. 5. do.

Therefore, the connection management module A-5 of the asynchronous transmission mode network management system reconfigures the connection according to the newly selected routing path according to FIG. 5 and informs the configuration management module of the Internet network management system of the result (IF- 3 / IP-3).

Subsequently, the service management module (I-4) or the failure management module (I-3) of the Internet network management system predicts that the service quality of the link between routers is deteriorated, and requests the asynchronous transmission mode network management system from router to router. The asynchronous transfer mode virtual path connection reconfiguration corresponding to the link is completed.

On the other hand, since the router-to-router link of the Internet network is configured as a virtual path connection of the asynchronous transmission mode network, the asynchronous transmission mode communication network is recognized before the service quality degradation of the performance management module or the failure management module of the Internet network management system is recognized. The service quality degradation of the corresponding virtual path connection may be predicted in advance.

In this case, the failure management module (A-14) or the performance management module (A-3) of the asynchronous transmission mode network management system may request the virtual path connection establishment without the request for reconfiguring the virtual path connection by the Internet network management system. The process is as follows.

When a failure or performance degradation is detected in the virtual path connection used to configure the router-to-router link of the Internet among the preset virtual path connections, the failure management module (A-4) and the performance management module (A-3), respectively. (AF-1 / AP-1), each module requests a connection management module to reconfigure a virtual path connection (AF-2 / AP-2).

The connection management module (A-5) receiving the virtual path connection reconfiguration request refers to the asynchronous transmission mode network configuration maintained by the configuration management module (A-2) as in the case of the virtual path connection reconfiguration by the Internet network management system. Configure a new routing table such as 4, calculate bandwidth, CDV, and CTD Quality of Service representative scores for each routing path, and prioritize them to establish virtual path connections according to the highest priority routing path. Reconstruct

Asynchronous transmission mode network management system Notifies the configuration management module (I-2) of the Internet network management system that the virtual path connection reconfiguration has been performed independently, so that the service quality degradation of the virtual path connection is independent of the Internet network management system. Asynchronous transmission mode network management system It is possible to provide stable internet service without harming service quality independently (AP-4 / AF-4).

The present invention provides a backbone network for an asynchronous transmission mode network that provides a quality of service for transmitting multimedia traffic that can satisfy a service quality that cannot be provided in the Internet. This is to configure internet network that can satisfy service quality by connecting routers of internet network. Through this, it is possible to provide more stable internet service which is increasing rapidly and high quality internet service to users. Can provide. Also, in the present invention, an asynchronous transmission mode network virtual path connection corresponding to the router-to-router link of the Internet network is recognized so that the service quality is recognized before the deterioration of service quality occurs in the router-to-router link of the pre-configured Internet network. By reconstructing, the Internet service user can be provided with continuous and stable Internet service without experiencing a deterioration in service quality.

In addition, preferred embodiments of the present invention are disclosed for the purpose of illustration, those skilled in the art will be able to various modifications, changes, additions, etc. within the spirit and scope of the present invention, such modifications and modifications belong to the following claims You will have to look.

Claims (5)

delete In the method of configuring an internet network using an asynchronous transmission mode network as a backbone network, A first step of providing a virtual path connection capable of satisfying a service quality requested for an internet network configuration in an asynchronous transmission mode network management system at the request of the internet network management system; And Detecting performance degradation and failure on a link of an internet network connected by the virtual path connection provided in the first step, and reconfiguring the virtual path connection in the asynchronous transmission mode network management system at the request of the internet network management system. Process, The first process a) requesting an asynchronous transmission mode system by specifying an endpoint and a bandwidth of a main router to be connected in the Internet network management system, an allowable cell delay deviation, and an allowable cell transmission delay; b) the asynchronous transmission mode system received in step (a) calculating all possible routing paths between designated transmission / reception points; C) when the routing path calculation is completed in step (b), calculating a service quality representative index of bandwidth, allowable cell delay deviation, and allowable cell transmission delay for each routing path and determining priority for each routing; ; d) selecting a routing path that satisfies the quality of service by the priority determined in step (c); And  e) establishing an internet network link between routers by terminating the zero endpoint information value provided by the asynchronous transmission mode network management system after selecting the routing path in step (d). To manage asynchronous transfer mode connections. The method of claim 2, The bandwidth is the smallest of the bandwidths of the links present on the routing path, and the allowable cell delay and allowable cell transmission delay are the sum of all allowable cell delay and allowable cell transmission delays on the link, respectively. Asynchronous transmission mode connection management method for guaranteeing the quality of service of the Internet network, characterized in that the representative quality of service index. The method of claim 2, Priority for each routing is A first condition for reducing the bandwidth specified by the Internet network management system in the bandwidth service quality representative index on the routing path and giving the highest priority to the routing path having the largest remaining bandwidth; A second condition of making the routing path having the least CDV higher in the case where at least one routing path having the same bandwidth as the first condition exists; A third condition of increasing the priority of a path having fewer CTDs when one or more paths having the same CDV exist in the second condition; And If one or more identical priorities exist as a result of performing the first condition and the second condition, the Internet network quality of service is determined according to the fourth condition of allocating a path that comes first on the routing table. To manage asynchronous transfer mode connections The method of claim 2, The second process is a) recognizing a degradation in quality of service for a link between routers of an internet network and requesting a connection reconfiguration for a virtual path connection corresponding to the degraded link to an asynchronous network management system; b) configuring according to network shape information maintaining a routing path between designated transmission / reception points in an asynchronous transmission mode management system according to the connection reconfiguration request in step (a); c) calculating a bandwidth, cdv, ctd quality of service representative index for each routing configured in step (b); And d) reconfiguring the virtual path connection according to the routing path having the highest priority by assigning a priority to the quality representative index calculated in step (c). How to manage asynchronous transfer mode connections.

Images