KR100569193B1 - Method for offering quality of service vod service using 802.1p of e-pon olt system - Google Patents

Abstract

The present invention relates to a method for providing a quality-guaranteed VOD service using 802.1p in an E-PON OLT system. Setting an attribute of a flow control queue corresponding to 802.1p at this output port, setting a BA (Behavior Aggregate) table defining behavior of a corresponding VLAN packet, and applying the configured BA to a set VLAN group By providing quality guaranteed services, not only can we guarantee quality in various services such as Internet broadcasting, EOD, video telephony and VoIP, but also works with COS guarantee method using DiffServ and MPLS protocol of core system. Subscriber end-to-end services such as peer-to-peer services can also satisfy QOS.

QOS, 802.1p, VOD, OLT

Description

TECHNICAL FOR OFFERING QUALITY OF SERVICE VOD SERVICE USING 802.1P OF E-PON OLT SYSTEM}             

1 is a block diagram of an E-PON OLT system to which the present invention is applied;

2 is a flowchart illustrating a setting for providing a quality guaranteed video on demand (VOD) through 802.1p priority control applied to the present invention;

3 is a subscriber station configuration diagram showing an example of providing a quality-guaranteed VOD service using the E-PON OLT system applied in the present invention.

<Explanation of symbols for the main parts of the drawings>

101: main processor

102: L2BSF Module

103: resource management module

104: input line card processor

105: input network processor

106: switch

107: output line card processor

108: output network processor

The present invention relates to a method for providing a quality guaranteed VOD service using 802.1p in an E-PON OLT system, and more particularly, to an E-PON OLT which is an access system of a subscriber station providing communication through a virtual local area network (VLAN); The present invention relates to a method for providing a quality guaranteed VOD service using 802.1p in an E-PON OLT system that provides differentiated services through characteristics of packets classified using an 802.1p field for an ONT / ONU section.

As the demand for the Internet and various types of services are provided according to the needs of users, a technology for efficiently delivering explosive traffic to the subscriber is needed. In the quantitative aspect, this is solved by increasing the speed and high performance of the infrastructure through the expansion of circuits and switching / routing equipment, but in the quality aspect, it relies only on the best effort service model provided by existing equipment. This best effort service model is not suitable for providing a streaming service that needs to process a lot of bandwidth in real time, such as Internet broadcasting, video on delay (VOD), and education on demand (EOD). In order to guarantee the quality of traffic having real-time bandwidth of the service subscriber, it is necessary to classify the characteristics of packets inputted from the subscriber's access system such as router or switch and provide differentiated processing according to the characteristics.

In order to provide such a differentiated service, the core network uses a signal processing protocol such as multi-protocol label switching (MPLS), and the subscriber terminal close to the user considers the IP or virtual local area network (VLAN) quality guarantee scheme to consider the core router. And a method of providing a COS at an access router or a switch at a subscriber end is considered through the classification of packets at each router node, the priority field present in each protocol, and the use of multiple output queues.

Accordingly, an object of the present invention is to solve the problems of the prior art, to provide end-to-end QOS, to provide real-time broadband services such as VOD, Internet broadcasting, which should guarantee the quality to the subscriber end, As the access system of E-PON OLT and ONT / ONU provide communication through virtual local area network (VLAN), it classifies incoming packet using 802.1p field and differentiates service through characteristics of classified packet. The present invention provides a method of providing quality guaranteed VOD service using 802.1p in an E-PON OLT system.

To this end, the present invention provides a profile for a flow control queue that is responsible for bandwidth guarantees and packet priority processing that must be processed in a data plane network processor and a VLAN BA (Vehicle Behavior Aggregate) using them. In the E-PON OLT system, tables describing the behavior of VLAN packets are set and controlled in a control plane including a Layer 2 Bridge Service Function (L2BSF) and a resource management module that is in charge of VLAN configuration to provide differentiated services for VOD services. The purpose of the present invention is to provide a quality guaranteed VOD service providing method using 802.1p in an E-PON OLT system.

In order to achieve the above object, in the E-PON OLT system of the present invention, a method of providing a quality guarantee type VOD service using 802.1p includes

a. Setting an 802.1p priority to an input port of an OLT system to which VOD streaming is input;

b. Setting an attribute of a flow control queue corresponding to 802.1p at an output port at which priority-specified traffic is output, and setting a behavior aggregate (BA) table defining behavior of a corresponding VLAN packet; And

c. Providing a quality guaranteed service by applying the set BA to the set VLAN group

Characterized in that comprises a.

On the other hand, in the E-PON OLT system of the present invention, a method of providing quality guaranteed VOD service using 802.1p,

A first step of setting an 802.1p priority to an input port of an OLT system to which VOD streaming is input in a main process;

A second step of changing and setting the default output queue of the network process of the output port to the output queue according to the priority;

A third step of setting a peak service rate (PSR) of the changed default best effort processing output queue and setting a VLAN BA table corresponding to a best effort;

Setting a SSR (Sustainable Service Rate) attribute of the flow control queue for the priority; And

A fifth step of creating a VLAN BA table pool, which is a set of rules mapping the priority and flow control queues set in the first and third steps, and downloading them to the corresponding network process;

Characterized in that comprises a.

Hereinafter, a method of providing a quality guarantee type VOD service using 802.1p in an E-PON OLT system of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of an E-PON OLT system to which the present invention is applied. Referring to FIG. 1, the E-PON OLT system to which the present invention is applied includes a layer 2 bridging service function (L2BSF) for configuring a main process 101 in charge of overall router management, a routing protocol, and a virtual local area network. A packet input from the resource management module 103 for managing a resource such as a band of the system, a matching card process 104 and 107 having an external input port, and a line card process with another external input port. (104,107) Network process 105,108, which is responsible for forwarding packets to appropriate output ports through forwarding table lookup and traffic classification and flow control for forwarding, and switch fabric 106 to enable high-speed switching between ports. )

As described above, when the E-PON OLT system receives a general packet from the VOD server to the input line card processor 104, the resource management module 103 sets the 802.1p priority set in the input network process 105. And then forward the packet through the switch 106 to the network process 108 at the output. Forwarded packets are flow control queues according to the corresponding 802.1p priorities described in the VLAN Behavior Aggregate (BAA) table previously downloaded from the main process 101 to the output network process 108 by the resource management module 103. Through the output port of the line card 107 is transmitted to the external network.

Next, a method of providing a quality guaranteed VOD service using 802.1p in the E-PON OLT system having the above configuration will be described with reference to FIGS. 2 and 3.

2 is a flowchart illustrating a configuration for providing a quality guaranteed video on demand (VOD) through 802.1p priority control applied to the present invention. Specifically, it is a flowchart for setting parameters corresponding to the input and output network processes 105 and 108 in the resource management module 103 and the L2BSF 102.

Referring to FIG. 2, a virtual local area network (VLAN) setting up to an E-PON OLT system and an ONT / ONU is performed by the user through the L2BSF module 102 (S201), and a VOD server ( An 802.1p priority corresponding to the input ports 104 and 105 corresponding to 306 and 308 of FIG. 3 is set (S202).

In order to support differentiation services in the network processes 105 and 108 that process only the best effort processing for all packets entering the system, the output network process 108 may use the base of the output queue to process the priority of the 802.1p field. To change (S203). At this time, when the base is changed, a setting for processing the best effort (BE) flow, that is, a VLAN packet having a priority of 0, is set to the corresponding network process 108 through the resource management module 103. This is to differentiate and process packet processing by allocating different output queues through classification according to each priority for traffic processed without classification into one trunk type.

When the base of the queue is changed to a queue for differentiating service, a parameter defining a property of a flow control queue according to each priority of 802.1p according to the base is received and set in the output network process 108 (S204). There may be various parameters for the flow control queue, but in this system, a method of guaranteeing a bandwidth of a flow output through a sustainable service rate (SSR) is applied.

After the flow control queue is set up at the output, create a VLAN BA (Behavior Aggregate) table that describes the behavior of incoming VLAN packets (information that maps the 802.1p priority marked at the input to the flow control queue at the output). It downloads to the network process 108 (S205).

Finally, the VLAN BA table number to be applied to the VLAN group configured by the L2BSF 102 is set (S206). For example, up to eight VLAN BA tables can be used to apply different quality assurance policies to different VLAN groups.

3 is a subscriber station configuration diagram showing an example of providing a quality-guaranteed VOD service using the E-PON OLT system applied in the present invention through the configuration of FIG.

Referring to FIG. 3, the priority of a port input from the MPEG2 VOD server 306 to the E-PON OLT system 201 is set to 1, and the priority of a port input from the MPEG4 VOD server 307 is set to 2. Set it. The default priority (0) is set for a port input from the general Internet 308, and the guaranteed bandwidth for each priority for the output ports destined for the IP TV 304 and the terminal 305 of each subscriber is set. By setting (BE: 140M, priority 1: 40M, priority 2: 10M), it is possible to provide a VOD service with a guaranteed bandwidth compared to general Internet or data traffic.

This can provide a seamless VOD service by first processing internally high-priority VOD traffic when input traffic such as general Internet 308 and traffic for VOD service exceeds the processing bandwidth of the OLT system.

Although the present invention has been described in more detail with reference to some embodiments, the present invention is not necessarily limited to these embodiments, and various modifications can be made without departing from the spirit of the present invention.

As described above, in the E-PON OLT system according to the present invention, the method for providing a quality guarantee type VOD service using 802.1p is a broadband such as a VOD service through processing according to the priority of VLAN packets input to the E-PON OLT system. Quality of traffic having real time can be guaranteed. This ensures quality for a variety of services such as Internet broadcasts, EOD, video telephony, and VoIP. In addition, QOS can be satisfied even in subscriber end-to-end service such as P2P service by interworking with COS guarantee method using DiffServ and MPLS protocol of core system.

Claims (4)

a. Setting an 802.1p priority to an input port of an OLT system to which VOD streaming is input; b. Setting an attribute of a flow control queue corresponding to 802.1p at an output port at which priority-specified traffic is output, and setting a behavior aggregate (BA) table defining behavior of a corresponding VLAN packet; And c. Providing a quality guaranteed service by applying the set BA to the set VLAN group Quality assurance type VOD service providing method using 802.1p in an E-PON OLT system comprising a. A first step of setting an 802.1p priority to an input port of an OLT system to which VOD streaming is input in a main process; A second step of changing and setting the default output queue of the network process of the output port to the output queue according to the priority; A third step of setting a peak service rate (PSR) of the changed default best effort processing output queue and setting a VLAN BA table corresponding to a best effort; Setting a SSR (Sustainable Service Rate) attribute of the flow control queue for the priority; And A fifth step of creating a VLAN BA table pool, which is a set of rules mapping the priority and flow control queues set in the first and third steps, and downloading them to the corresponding network process; Quality assurance type VOD service providing method using 802.1p in an E-PON OLT system comprising a. [4] The method of claim 2, wherein the VLAN BA table created in the fifth step is mapped to an organized VLAN group and differentiated according to VLAN groups. The method of claim 2, wherein before the first step A method of providing a quality guaranteed VOD service using 802.1p in an E-PON OLT system, further comprising the step of establishing a virtual local area network (VLAN) to an OLT system and an ONT / ONU.

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