KR100585229B1 - Method for providing quality of service guarantee, and home network system using the same - Google Patents

Abstract

The present invention relates to a service quality providing method and a home network system using the same. A home network system according to the present invention is a home network system that guarantees a quality of service between a service providing network and a subscriber network, comprising: a plurality of edge nodes which classify and transmit data packets transmitted and received between the service providing network and the subscriber network; A bandwidth broker that manages link level and pass level information of the edge node and controls bandwidth according to the service level of the data packet; And a service distribution management system that receives the pass level information from the bandwidth broker and performs admission control for data packet transmission of the edge node.

Home network systems, service distribution management systems, bandwidth brokers, differential services, edge nodes

Description

METHOD FOR PROVIDING QUALITY OF SERVICE GUARANTEE, AND HOME NETWORK SYSTEM USING THE SAME}

1 illustrates a home network system according to an embodiment of the present invention.

FIG. 2 shows an internal configuration of the service distribution management system shown in FIG.

3 illustrates a service management step of a service quality providing method according to an embodiment of the present invention.

4 illustrates a call admission control step of a method for providing a quality of service according to an embodiment of the present invention.

5 illustrates a dynamic resource control step of the method for providing a quality of service according to an embodiment of the present invention.

The present invention relates to a method of providing quality of service, and more particularly, to a method of providing quality of service in a home network system.

In addition to the existing best-effort services in the Internet network, there has been a demand for various service quality guarantees. As a method of guaranteeing the quality of service in the Internet network, the Internet Engineering Task Force (IETF), an Internet standardization organization, proposed an integrated service (IntServ) model and a differentiated service (DiffServ) model.

The integrated service model operates based on the Resource Reservation Protocol (RSVP), and each node always has service quality-related status information due to the nature of the protocol. Therefore, the load for storing state information is large in each node constituting the network, and as the network grows, the state information to be managed also increases. Due to this scalability problem, the direct service model is generally used in a small network such as an access network, and the differential service model is applied in a backbone (core) network where a large and large traffic is delivered. It is common.

In the differential service model, the information of each node is stored in one server called bandwidth broker, and the server can manage the overall quality information of the network.

In this differential service model, the bandwidth broker needs a lot of memory because the information to be managed by the bandwidth broker is obtained from all nodes in the network. In addition, each edge node always sends an admission control message to the bandwidth broker when a packet arrives, and accesses or discards the network according to the result of the response message. Therefore, there is an excessive amount of signaling messages transmitted from the edge node to the bandwidth broker.

An object of the present invention is to provide a method for providing end-to-end quality of service in a home network system.

Another object of the present invention is to provide a service quality providing method capable of reducing the role of a bandwidth broker in a home network system.

In order to achieve the above object, a home network system according to an aspect of the present invention is a home network system that guarantees a quality of service between a service providing network and a subscriber network, and receives data packets transmitted and received between the service providing network and the subscriber network. A plurality of edge nodes that classify and transmit; A bandwidth broker that manages link level and pass level information of the edge node and controls bandwidth according to a service level of the data packet; And a service distribution management system that receives the pass level information from the bandwidth broker and performs admission control on the data packet transmission of the edge node.

In a home network system according to an aspect of the present invention, when the service distribution management system is no longer able to allocate bandwidth to the path, it transmits an admission control message to the bandwidth broker, and the bandwidth broker When the admission control message is received, the admission control is performed based on the link level information.

In a home network system according to an aspect of the present invention, the edge node comprises a traffic classifier function for dividing the data packet into multiple field classifications and BA (Behavior Aggregate) classification, and a traffic measurement for measuring the flow of the data packet. And a traffic shaper / dropper function that performs packet discard and the like for packets that deviate from the traffic profile.

In a home network system in accordance with an aspect of the present invention, the edge node is provisioned by the bandwidth broker.

In a home network system according to an aspect of the present invention, the service distribution management system is a remote management center that provides a home portal, a service provider portal, and an administrator portal, mapped to the edge node and input from the remote management center. A remote management engine for delivering remote management operations to the subscriber network, and a remote management interface for connecting the service distribution management system with the subscriber network.

In a home network system according to an aspect of the present invention, the service providing network registers a service to be provided through the service provider portal of the remote management center, and the subscriber network requests the service through the home portal. do.

In a home network system according to an aspect of the present invention, the remote management interface, upon receiving a quality of service request from the subscriber network, forwards the quality of service request to a first remote management engine mapped with an input edge, The first remote management engine sends and receives a quality of service request / response message with a second remote management engine mapped to an output edge for admission control, and the first remote management engine sends a response to the quality of service request to the subscriber network. Send through the remote management interface.

According to an aspect of the present invention, there is provided a method of providing a quality of service of a home network system, the method comprising: a first step of the service distribution management system establishing a communication connection between the service providing network and the subscriber network; A second step of, when the service distribution management system receives a quality of service request from the subscriber network, performs acceptance control on the quality of service request, and transmits and receives data between the service providing network and the subscriber network; And a third step of the bandwidth broker controlling dynamic resources according to the amount of traffic transmitted and received between the service providing network and the subscriber network.

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

1 illustrates a home network system according to an embodiment of the present invention.

As shown in FIG. 1, a home network system according to an embodiment of the present invention includes a service providing network 100, a backbone network 200, and subscriber networks 310 and 320.

The service providing network 100 includes a service providing server 110 and a server farm 120, and the service providing server 110 and the server farm 120 are backbones through the core node 130 and the edge node 140. Is connected to the network 200.

The backbone network 200 is a network for providing a differential service, and includes a bandwidth broker 210, a service distribution management system 220, a plurality of core nodes 230a and 230b, and a plurality of edge nodes 240a, 240b).

The bandwidth broker 210 manages pass level and link level information of each edge node 240a-240c in one domain in the backbone network 200, and manages bandwidth according to a service level. In addition, the bandwidth broker 210 manages all information related to admission control and resource management.

The service distribution management system 220 is located in the backbone network 200 and interworks with the bandwidth broker 210. In addition, the service gateway 312 is operated and managed remotely in connection with a residential gateway of the subscriber networks 310 and 320 to perform a service management function.

The edge nodes 240a-240c determine how to deliver home service packets in the backbone network 200 to provide a differential service in the Internet network, and classify and display the packets. This function is called traffic conditioning, and traffic conditioning will be described later.

The subscriber network 310 includes a residential gateway including a network terminal (NT, A / VDSL Modem, etc.) 311 and a service gateway 312 and various subscriber equipment 313-315 in the home. The service gateway 312 provides an interface for the various subscriber equipment 313-315 in the home. The various subscriber equipment 313-315 in the home may be a television 313, a personal computer 314, a home automation 315, or the like, and may include various other equipment.

FIG. 2 schematically illustrates an internal configuration of the service distribution management system shown in FIG. 1.

As shown in FIG. 2, the service distribution management system 220 according to an embodiment of the present invention may include a plurality of remote management centers connected to a remote management center (RMC) 221 and a remote management center 221. Engine (Remote management engine: RME, 222, 223), and a plurality of remote management interfaces (RMI, 224-229) connected to the remote management engine (222, 223).

The remote management center 221 provides a home portal, a service provider portal, and an administrator portal. The remote management engines 222 and 223 are mapped to one edge node, respectively, and transfer the remote management operations input from the remote management center 221 to the remote management interfaces 224 to 226 and 227 to 229, respectively, to the service gateway. Operate (312, 322).

Hereinafter, a differential service providing method according to an embodiment of the present invention will be described.

As described above, the edge nodes 240a-240c classify and mark packets to determine how to deliver home service packets within the backbone network 200. This traffic conditioning consists of several functions:

In other words, the traffic is referred to as Multi-field (MF) classification based on IP header fields such as source and destination address fields in addition to the Differentiated Service (DS) code, and only DS bytes are used. There is a traffic classifier function that divides into BA (Behavior Aggregate) classification.

In addition, there is a traffic measurement function that measures the packet flow based on the traffic profile promised by the service level agreement (SLA) with the subscriber and delivers the result (profile compliance or violation) to the following element functions. do.

Furthermore, packets delivered in the same packet delivery scheme in the differential service network have the same DS byte code value. In addition, a set of packets coming into the DS network with the same DS code value is called a BA, and the traffic indicator is responsible for a function of recording a packet corresponding to a specific packet delivery method in a DS byte so that the packet belongs to a specific BA. In addition, it consists of a traffic shaper / dropper that performs a function such as packet discarding for packets that deviate from the promised traffic profile (packet arrival rate, burst length) in order to conform the traffic pattern to the previously promised traffic profile. do. Edge nodes 241a-240c that are responsible for this function are provisioned by bandwidth broker 210.

In the method of providing a quality of service according to an embodiment of the present invention, an edge node 240a to 240c is linked with a service distribution management system 220 that is in charge of an admission control agent function to pass-level information managed by the bandwidth broker 210. ), Allows service distribution management system 220 to respond to quality of service requests from subscribers.

Hereinafter, a service quality providing method according to an exemplary embodiment of the present invention will be described with reference to FIGS. 3 to 5.

3 illustrates a service management step of a service quality providing method according to an embodiment of the present invention.

As shown in FIG. 3, the service management step according to an embodiment of the present invention is a step in which authentication / authorization and authentication / authorization / accounting functions are performed.

The service provider develops a home network service (on-demand video, home viewer, telemedicine, home automation, etc.) in a bundle based on standards, and provides a service provider portal provided by the remote management center 221 of the service distribution management system 220. Register at (S301).

The service user may apply for a service registered by the service provider through the home portal provided by the remote management center 221 of the service distribution management system 220, and the service distribution management system 220 may authenticate the service provider and the service user. , Authority verification, billing function and the like (S302).

Thereafter, the service distribution management system 220 performs a service operation (install, start, stop, uninstall, update, etc.) for the service requested by the service user (S303). The service gateways 312 and 322, which have installed service bundles from the service distribution management system 220, establish a secure communication connection with the service providing server 110, and traffic transmitted from the service providing server 110 is stored. It is received and substantially provided with the service (S304).

4 illustrates a Call Admission Control (CAC) step of a method for providing a quality of service according to an embodiment of the present invention.

As shown in FIG. 4, according to an embodiment of the present invention, when a service request is activated from a service user (S401), the service gateway 312 transmits a QoS request to the backbone network 200. (S402), and deliver the relevant traffic parameters. This QoS request is transmitted to the remote management engine linked with the ingress edge node (S403).

At this time, the remote management engine interworking with the input edge node for the admission control transmits and receives a QoS request / response message to the power management engine interworking with the egress edge node (S404). Upon receiving the response, the input remote management engine transmits a response message to the QoS request to the service gateways 312 and 322 to transmit and receive data (S405 and S406). In addition, the admission control may be performed based on locally stored state information in each service distribution management system.

5 illustrates a dynamic resource control step of the method for providing a quality of service according to an embodiment of the present invention.

In the bandwidth broker 210 connected to the backbone network 200 that provides the differential service, global network resources are managed on a per-class basis, and the traffic matrix of each class Based on global expectation and routing information, the initial provisioning algorithm may define a bandwidth prediction amount for each link for each link (S501-S503). Based on this value, router interface parameters (ex, weights of weighted fair queue (WFQ), etc.) are set, and an admission limit of the service distribution management system 220 is also assigned at this time (S503-S505). ).

For each class, the dynamic resource algorithm can dynamically adjust the value of the admission limits according to the current request arrival. Each service distribution management system 220 may collect the amount of traffic input from the service subscriber in addition to information related to service management (service bundle status, etc.) from the service gateways 312 and 322, and the dynamic resource mechanism may be a service distribution management system. The resource pool is operated between the 220 and the bandwidth broker 210.

According to an embodiment of the present invention, by including a service distribution management system in a home network system, the service distribution management system performs a function of a hierarchical bandwidth broker as a child bandwidth broker.

Specifically, internal routing protocols such as Open Shortest Path First (OSPF), Routing Information Protocol (RIP), etc. operate at edge nodes 240a-240c belonging to the backbone network 200. have. State information such as routing information and overall bandwidth of the link is transmitted to the bandwidth broker periodically or on demand. The bandwidth broker 210 generates a link level service quality information database based on the routing information received from the edge nodes 340a-240c and the node state information. The link information of each node is databased. The link level quality of service information database is very complex and occupies a large amount of memory resources of the bandwidth broker, and a response delay to the admission control request message required from the edge nodes 240a-240c may occur.

A pass level service quality information database is created based on the link level service quality information database. The number of signaling messages can be reduced by performing pass level admission control in the service distribution management system 220, which is a child bandwidth broker, by dividing the information database for determining admission control into two types. The complexity can be reduced.

When the packet is input, the admission control procedure is described. The child bandwidth broker receives the corresponding pass level quality of service information database from the parent bandwidth broker and manages it. When a packet is input, it finds database information about the path and executes admission control for that path. When the bandwidth is allocated, the path information is updated. However, when the child bandwidth broker 220 is no longer able to allocate bandwidth to the path as a result of admission control, the child bandwidth broker 220 transmits an admission control message to the parent bandwidth broker 210. The parent bandwidth broker 210 looks up the admission control for the requested packet on a link level basis based on the link level quality of service information database in the same way as the conventional bandwidth broker. If bandwidth allocation is possible, the parent bandwidth broker 210 updates the link level quality of service information database and the pass level quality of service information database and downloads it back to the child bandwidth broker 220. If there are no more resources allocated at the link level, a reject message is sent. The packet is discarded without access to the differential service network.

As a result, the complexity of the bandwidth broker 210 in the existing differential service model may be reduced, and scalability may be facilitated. And, without providing a separate multiple bandwidth broker, it is possible to provide a quality of service while providing a home network service.

In addition, in the admission control presented as a method of guaranteeing the quality of service in the Internet service, the function of the bandwidth broker can be simplified compared to the method using the existing bandwidth broker alone, and distributed to the pass level quality of service information database at the edge nodes. The execution time of admission control is saved, and the number of signaling messages to the bandwidth broker is reduced, thereby improving the performance of the entire network.

In the above, the apparatus and method for providing a service quality in a home network system according to an embodiment of the present invention have been described in detail. The embodiment described above is an embodiment to which the concept of the present invention is applied, and the scope of the present invention is not limited to the above embodiment, and various modified embodiments may be formed using the concept of the present invention as it is. Is apparent to those skilled in the art.

According to the present invention, it is possible to provide a method for providing end-to-end service quality in a home network through interworking with a service distribution management system and a differential service model for providing service quality in an Internet-based network.

In addition, by sharing the role of the bandwidth broker by interworking the bandwidth broker and the service distribution management system, the function of the bandwidth broker can be simplified, and the number of signaling messages of the bandwidth broker can be reduced to improve the performance of the entire network.

Claims (9)

In the home network system to guarantee the quality of service between the service provider network and the subscriber network, A plurality of edge nodes for classifying and transmitting data packets transmitted and received between the service providing network and the subscriber network; A bandwidth broker that manages link level and pass level information of the edge node and controls bandwidth according to a service level of the data packet; And A service distribution management system that receives the pass level information from the bandwidth broker and performs admission control on the data packet transmission of the edge node. Including, If the service distribution management system analyzes the received pass level information and determines that the bandwidth can no longer be allocated, the service distribution management system forwards an admission control message to the bandwidth broker. And when the bandwidth broker receives the admission control message, performing the admission control according to the link level information. delete The method of claim 1, The edge node performs a traffic classifier function for dividing the data packet into a multi-field classification and a BA (Behavior Aggregate) classification, a traffic measurement function for measuring the flow of the data packet, and packet discard for a packet that deviates from the traffic profile. A home network system that performs a traffic shaper / dropper function. The method of claim 2, The edge node is provisioned by the bandwidth broker. The method of claim 1, The service distribution management system includes a remote management center providing a home portal, a service provider portal, and an administrator portal, a remote management engine mapped to the edge node and delivering remote management operations input from the remote management center to the subscriber network; And a remote management interface for connecting the service distribution management system and the subscriber network. The method of claim 5, And the service providing network registers a service to be provided through the service provider portal of the remote management center, and the subscriber network subscribes to the service through the home portal. The method of claim 5, When the remote management interface receives a quality of service request from the subscriber network, the remote management interface forwards the quality of service request to a first remote management engine mapped with an input edge, The first remote management engine transmits and receives a quality of service request / response message with a second remote management engine mapped to an output edge for admission control; And the first remote management engine transmits a response to the quality of service request to the subscriber network through the remote management interface. In the service quality providing method of a home network system, A first step of the service distribution management system in charge of the admission control agent function establishing a communication connection between the service providing network and the subscriber network; A second step of, when the service distribution management system receives a quality of service request from the subscriber network, performs admission control on the quality of service request, and transmits and receives data between the service providing network and the subscriber network; And A third step of the bandwidth broker controlling dynamic resources according to the amount of traffic transmitted and received between the service providing network and the subscriber network; Quality of service providing method comprising a. The method of claim 8, In the second step, a service distribution management system controlling an input edge node of the edge nodes sends the service quality request to a service distribution management system controlling an output edge node, and outputs a response to the service quality request. Quality of service providing method for receiving from the service distribution management system controlling the edge node and transmitting to the subscriber network.

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