KR20020069578A - Transmission system for supplying quality of service in network using internet protocol and method thereof - Google Patents

Abstract

PURPOSE: A transmission system and method for supporting QoS(Quality of Service) priority in a network using an IP(Internet Protocol) is provided to give priority according to the QoS of packet data. CONSTITUTION: An MAN(Metropolitan Area Network) is divided into a hub node(200), remote nodes(250,270), HNAs(Hannae NGIP Access systems)(229,231,233,235), and HNCs(Hannae NGIP Core systems)(223,225). The hub node(200) consists of an SDH(Synchronous Digital Hierarchy) optical terminal system(211), an HNC(213), a GSR(Giga bit Switching Router)(215), a B-RAS(217), a router(219), and an ATM switch(221). The SDH optical terminal system(211) can be embodied as a DWDM(Dense Wavelength Division Multiplexing) equipment. The HNC(213) segments the data received from the SDH optical terminal system(211), detects QoS priority, creates mini-packets, routes the mini-packets according to the detected QoS priority, and transmits them to an HNA. The GSR(215) is connected with the B-RAS(217), the router(219), and the ATM switch(221).

Description

TRANSPORT SYSTEMS AND METHOD FOR SUPPORTING QUALITY OF QUALITY IN NETWORKS USING THE INTERNET PROTOCOL {TRANSMISSION SYSTEM FOR SUPPLYING QUALITY OF SERVICE IN NETWORK USING INTERNET PROTOCOL AND METHOD THEREOF}

The present invention relates to a network system, and more particularly, to a data transmission system and method for supporting a quality of service priority of packet data in a transport network using an Internet protocol.

As the modern society develops, communication technology is also developing rapidly. As the communication technology is rapidly developed, the development of personal information personal information society such as personal information retrieval using individual mobile communication and internet search is also taking place. As such, the use of the Internet is becoming more common, and accordingly, the number and degree of use of the Internet are radically increasing. Currently, the Internet transport network is constructed in the form of an Internet Protocol (IP) transport network using a voice infrastructure. Here, the configuration of the Internet protocol transport network will be described with reference to FIG.

1 is a view schematically showing a network configuration according to the prior art.

First, as illustrated in FIG. 1, when a user accesses a network, for example, company A-0 111 transmits data to another user accessing the network, for example, company A-1 113. Will be described.

First, the enterprise A-0 (111) connects to the Add / Drop Multiplexer (ADM) 115 through T1. Then, the ADM 115 adds the data to the enterprise A-0 111 to perform the connection, and adds the data to the corresponding synchronous optical network (SONET) / synchronous digital layer (SONET). SDH: Synchronous Digital Hierarchy (117) transmits the data to ADM 119 via access ring 117. The ADM 119 receives the signal transmitted from the ADM 117 and transmits the signal to the digital cross-connect system (DCS) 121. The DCS 121 then performs transmission control on the data received from the ADM 119 and transmits the data to the ADM 125 of the synchronous optical network / synchronous digital layer core ring 123. Accordingly, the ADM 125 transmits the signal received from the DCS 121 to the ADM 127 to which the enterprise A-1 113 is connected, and the ADM 127 receives the signal from the ADM 125. A data is dropped into the enterprise A-1 113. Thus, the data transmitted from the company A-0 (111) is transferred to the company A-1 (113).

In the network according to the prior art as shown in Figure 1 there is a limit to accommodate the rapidly increasing Internet users due to the current information age. That is, the synchronous optical network / synchronous digital layer network is constructed based on a time division multiple (TDM) scheme, and the time division multiple scheme cannot accommodate the Internet traffic caused by the surge of Internet users. There is a problem that an internet traffic bottleneck occurs in a metro area network (MAN) area constructed with a synchronous optical network / synchronous digital layer network. In addition, the time-division multiplexing-based synchronous optical network has a problem in that a high cost structure is caused in a hardware configuration and a user pays a high fee.

In addition, the time-division multiplexing-based metro network has to secure a bandwidth capable of accommodating the burst traffic when transmitting burst traffic, and thus a user fee for securing the bandwidth is incurred. Is not suitable for burst traffic transmission because it has to pay a high fee for using the bandwidth.

In the current Internet network, local area network (LAN) and wide area network (WAN) technologies are being advanced. That is, a broadband network that allows a single user to use several Mbps of bandwidth by introducing TSR (Terabit Switch Router), Dense Wavelength Division Multiplexing (DWDM), Optical Add / Drop Multiplexer (OADM), and Optical Cross Connect (OXC). With the introduction of Gigabit Ethernet, users are using 10/100 Mbps of bandwidth, and the local area network that establishes 1000Mbps large capacity link between servers and switches has been advanced.

Therefore, the necessity of constructing an internet infrastructure for solving the problems of the time division multiple access based metro network has emerged.

The following points were considered in the Internet infrastructure for solving the problems of the time division multiplex based metro network.

(1) In order to eliminate the bandwidth securing problem for burst traffic transmission, which is the biggest problem of the time division multiple method based metro network, link bandwidth is used instead of the circuit switching method used in the time division multiple method based metro network. A shared packet exchange scheme is used. In this case, the packet-switched scheme uses statistical multiplexing to efficiently use the transmission band, thereby increasing the number of subscribers even when using the same bandwidth, thereby reducing the user fee.

(2) Consider asynchronous transfer mode ring based on Asynchronous Transfer Mode (ATM) technology, Packet over SONET (PoS) based on Internet protocol, Dynamic Packet Transport (DPT), etc. .

Here, in the Internet infrastructure based on the asynchronous transmission mode and the Internet protocol, a comparison result of each of the base technologies, that is, the asynchronous transmission mode and the Internet protocol technology is shown below.

As shown in the comparison, in the network based on the Internet protocol and the asynchronous transmission mode technology, each of the Internet protocol and the asynchronous transmission mode technology has a technical advantage that can complement the limitation of the time division multiple access based wide area network.

The network based on the Internet protocol technology is currently mass-producing the Internet Protocol chip (CHIP) due to the generalization of the Internet technology, so that the Internet protocol chip and its related equipment are widely used, and have an efficiency in terms of price, and also the generalization of the Internet technology. As the frequency of use of Internet protocols increases, it is easy to manage and operate. Also, when constructing Ethernet-based metro and wide area networks, network overhead such as protocol conversion is eliminated, and additional IWF is performed. (InterWorking Function) is unnecessary, and lastly, compared with a network based on the asynchronous transmission mode, bandwidth waste due to overhead is relatively small (ATM: 25%, POS: 2%).

In addition, the network based on the asynchronous transmission mode is capable of supporting quality of service according to burst traffic in data transmission compared to the network based on the internet protocol, and the speed control according to the subscriber request is possible. Has the advantage. Here, in the asynchronous transmission mode, it is possible to control user traffic using Usage Parameter Control (UPC), thereby enabling speed control according to a subscriber's request. However, the advantages of the Internet protocol are disadvantageous aspects of the asynchronous transmission mode technology, and the advantages of the asynchronous transmission mode technology are represented as disadvantages of the Internet protocol.

Therefore, while utilizing both the advantages of the Internet protocol and the advantages of the asynchronous transmission mode, there is a need for a new transmission network that can supplement the disadvantages of the Internet protocol and the disadvantages of the asynchronous transmission mode.

Accordingly, an object of the present invention is to provide a transmission system and method for providing a priority according to a quality of service of packet data transmitted in a network using an internet protocol.

Another object of the present invention is to provide a transmission system and method for routing packet data generated at a subscriber according to a quality of service priority and then transmitting the packet data generated at a subscriber in a network using the Internet protocol to support the priority.

It is another object of the present invention to provide a transmission system and method for routing packet data generated on a network according to a quality of service priority and then transmitting the packet data generated on the network to a corresponding subscriber in a network using the Internet protocol. .

It is still another object of the present invention to provide a transmission system and method for controlling service quality and transmission rate for packet data transmitted in a network using an Internet protocol.

The system of the present invention for achieving the above objects; In a transmission system supporting quality of service priorities in a network using an Internet protocol, a first packet data input from a subscriber is analyzed, a service quality class label is assigned according to the quality of service priority, and the first packet data is analyzed. Generate the first mini-packets having the quality of service label included in the header information, perform routing according to the quality of service priority, and then reassemble the first mini-packets to add only the quality of service label. A first access system for transmitting the first labeled packet data, the first labeled packet data to determine an output backbone according to the routing information, and generating the first labeled packet data as second mini-packets. Performing the routing according to the quality of service priorities, and then removing the quality of service label and again. After reassembling into the first packet data and transmitting to the output backbone and the second packet data input from the backbone of the network to analyze the service quality class label according to the quality of service priority And generating the second packet data into third mini-packets having the quality of service label included in header information, performing routing according to the quality of service priority, and then reassembling the third mini-packets. A second core system for transmitting the second label packet data added with only the quality of service class label; receiving the second label packet data to determine a corresponding subscriber according to the routing information, and transmitting the second label packet data to the fourth Generates mini-packets to perform routing according to the quality of service priority and then removes the quality of service label. After the re-assembled into a packet data characterized in that it comprises a second access system for transmitting to the corresponding subscriber.

The method of the present invention for achieving the above objects; A first access system for routing the packet data input from the subscriber, a first core system for inputting data transmitted from the first access system to the backbone, and a second core for routing the packet data input from the backbone A transmission method for supporting a quality of service priority in a network using an internet protocol, comprising: a system; and a second access system for transmitting data input from the second core system to a corresponding subscriber. When the packet data is input, the first access system analyzes the first packet data and assigns a service quality class label according to the service quality priority, and includes the first packet data in the header information. Generated multiple first mini-packets to route routing according to the priority. Performing a first process of reassembling the first mini-packets into first label packet data attached only to the quality of service label and transmitting the first mini-packets to the first core system; and when the first label packet data is received, The first core system determines an output destination according to routing information of the first label packet data, generates the first label packet data into a plurality of second mini-packets, and performs routing according to the priority. A second process of removing the quality of service class label from the first mini-packets, reassembling it into the first packet data, and transmitting the first packet data to the output destination; and if the second packet data is input from the backbone, the second core system. Analyzes the input second packet data and assigns a service quality class label according to the service quality priority, and assigns the second packet data to the service quality and the like. Class label is generated as a plurality of third mini-packets included in the header information and the routing is performed according to the priority, and the third mini-packets are second label packet data added with only the quality of service class label. A third process of reassembling and transmitting to the second access system; and when the second label packet data is received, the second access system determines a corresponding subscriber according to routing information of the second label packet data, After generating 2-label packet data into a plurality of fourth mini-packets and performing routing according to the quality of service priority, the quality of service label is removed and then reassembled into the second packet data to the corresponding subscriber. Characterized in that the transmission process.

1 is a view schematically showing a network configuration according to the prior art

2 is a diagram schematically illustrating a metro network configuration according to an embodiment of the present invention;

FIG. 3 is a diagram schematically illustrating an overall network configuration using the metro network of FIG. 2.

4 is a diagram illustrating an access system structure based on packet data input and output according to an embodiment of the present invention.

5 is a block diagram illustrating an internal configuration of an access system according to an embodiment of the present invention.

6 is a diagram illustrating a core system structure according to packet data input and output according to an embodiment of the present invention.

7 is a block diagram illustrating an internal configuration of a core system according to an embodiment of the present invention.

8 illustrates a protocol stack of a data transmission system according to an embodiment of the present invention.

9 illustrates a routing structure according to a quality of service label according to an embodiment of the present invention.

10 illustrates a signal flow of a data transmission system according to an embodiment of the present invention.

11 illustrates an internal functional module of an access system according to an embodiment of the present invention.

12 illustrates an internal functional module of a core system according to an embodiment of the present invention.

FIG. 13 is a flowchart illustrating an operation process of functional engines of an access system when transmitting packet data in a mini-packet according to an embodiment of the present invention.

14 is a flowchart illustrating an operation process of function engines of an access system in a case of converting a mini-packet into packet data and transmitting the packet according to an embodiment of the present invention.

15 is a flowchart illustrating an operation process of function engines of a core system when routing an asynchronous transmission mode cell according to an embodiment of the present invention.

16 is a flowchart illustrating an operation of a packet priority control engine when a mini-packet is transmitted to an asynchronous transmission mode system according to an embodiment of the present invention.

17 is a flowchart illustrating an operation process of function engines of a core system when transmitting input label packet data according to an embodiment of the present invention.

18 is a flowchart illustrating an operation of a reassembly engine and a priority control engine when transmitting label packet data to an access system or a core system according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that in the following description, only parts necessary for understanding the operation according to the present invention will be described, and descriptions of other parts will be omitted so as not to distract from the gist of the present invention.

2 is a diagram schematically illustrating a metro network configuration according to an embodiment of the present invention.

First, as illustrated in FIG. 2, the Metropolitan Area Network (MAN) includes a hub node 200 and a remote node 250 and 270 that are backbones. And an access system (HNA: Hannae NGIP Access Syatem) and a core system (HNC) for processing data flowing into the metro network from the hub node 200 and data generated in the metro network for transmission to the backbone. Hannae NGIP Core System). The hub node 200 may be configured to receive data from the synchronous digital hierarchy (SDH) optical end station equipment 211 of the synchronous optical network (SONET) and the synchronous digital layer optical end station equipment 211. Segmentation and detection of priorities according to the quality of service are generated in a mini-packet in the form of an Asynchronous Transfer Mode (ATM) cell according to the priorities, and the generation A core system (HNC) 213 for routing the received mini-packets according to priority and transmitting them to an access system (HNA), a giga bit switching router (GSR) 215, and the gigabit switching router It is composed of a B-RAS 217, a router 219 and an ATM switch 221 connected to each other. The synchronous digital layer optical end station equipment 211 is implemented in a ring form supporting 2.5G to several hundred Gbps, and the gigabit switching router 215 also supports a gigabit band or 2.5Gbps transmission speed. Here, the digital synchronous layer optical end station equipment 211 is an example of the hub node 200 configuration, and may also be implemented as Dense Wavelength Division Multiplexing (DWDM) equipment.

A metro ring is formed between the hub node 200 and the remote node 250, and a sub ring is formed between the hub node 200 and the remote node 270. Here, the metro ring is formed of a plurality of core systems, that is, core systems 213, 223, 225, and 227 in a ring shape, and supports OC-48C / 192C Packet Over Sonet (POS). . In addition, the metro ring may be implemented in the form of a DWDM ring when the hub node 200 is implemented as a Dense Wavelength Division Multiplexing (DWDM) device. The sub ring is formed of a plurality of access systems 229, 231, and 233 and one core system 227, and supports OC-3C / 12 POS.

In addition, the remote node 250 is connected to the core system 225, and supports the OC-3C / 12C POS between the core system 225 and the subscriber router 251, the subscriber router 251 is a large enterprise It is connected to the LAN 253. In addition, the remote node 270 is connected to the access system 233, the access system 233 is connected to the general enterprise LAN or APT subscriber 273 through the switch 271, and HFC through the CMTS 281 A hybrid fiber coaxial cable network 283 and a Digital Subscriber Line Access Multiplexer (DSLAM) 291 are connected to an Asynchronous Digital Subscriber Line (ADSL) subscriber 293.

As shown in FIG. 2, the metro network according to the embodiment of the present invention supports the following system capacity and interface.

First, the core systems support 40Gbps for backplane capacity, DS3, STM1-4c 4Port for asynchronous transmission mode interface, and 1GE 10 port for Ethernet interface (I / F). Support OC-48C / 192C 2 port (1 + 1 Protection) as coring POS interface, OC-3C 12Port, OC-12C 4 port (1 + 1 Protection) as sub POS interface .

Secondly, the access systems support more than 1Gbps as backplane capacity, support 1GE 2 ports as Ethernet interface, 10 / 100Mbps 10 ports, and OC-3C / 12C 2 ports (1 + 1 Protection) as access ring POS interface. ).

In addition, the metro network shown in FIG. 2 provides the following functions.

. Bandwidth on Demand (BoD), 1M to 1Gbps

. Priority setting by grade according to application service (VoIP, VoD, DataBase)

. VLAN configuration (groupware, resource security) in metro network

. Dedicated tunnel ring line between enterprises in the metro network

. Guarantee QoS, Service Level Agreement (SLA)

. Real Time Network Monitoring

An example of the entire network configuration using the metro network described with reference to FIG. 2 is shown in FIG. 3.

3 is a diagram schematically illustrating an overall network configuration using the metro network of FIG. 2.

As shown in FIG. 3, a plurality of metro networks, for example, a metro network created around the Seoul region, a metro network created around the Busan region, and a metro network created around the Gwangju region It is connected to each other through a Metro Core Ring (Metro Core Ring) to perform the communication between the backbone of the metro network, and forms an access ring (access ring) to each subscriber in the metro network to perform communication.

4 is a diagram illustrating an access system structure based on packet data input and output according to an embodiment of the present invention.

The access system described with reference to FIG. 4 is commonly applied to all access systems implemented on the metro network according to the embodiment of the present invention described with reference to FIG. 2, and the access system structure of the access system 233 is provided for convenience of description. This will be described as an example.

When Internet Protocol Packet (IP Packet) data, for example, input first packet data (in 1) is input from an arbitrary subscriber physical framer in the remote node 270 connected to the access system 233, the access is performed. The system 233 filters the input first packet data in1. The filtering of the input packet data may include inspecting the input packet data to examine a physical port, a protocol type, and an Internet protocol source / destination address of the input packet data. It means that the quality of service (QoS) of the input packet is determined by having an address and a transmission control protocol (TCP) / user datagram protocol (UDP) internet protocol source / destination port. The function of allocating the quality of service label and the routing tag is performed by referring to a local database which is periodically updated by a routing processor 400, which is a controller, and the routing processor 400 is inputted and outputted to the access system. Overall control of the routing of data, that is, routing according to quality of service priorities. In this case, the priority of the quality of service may be the same as the case of voice data requiring real time transmission and the case of pre-set as important data. As such, when the Internet protocol packet filtering is terminated with respect to the input first packet data in1, the access system 233 provides a service corresponding to the input first packet data in1 to the input first packet data in1. Assign a label indicating the grade of quality, i.e., a quality of service label. In the assigning of the quality of service label, the quality of service quality to be included in the header portion of the generated mini-packet when the input first packet data is generated as a mini-packet in the form of an asynchronous transmission mode cell. It means assigning a rank. In addition, since the mini-packet is designed to have the same structure as the asynchronous transmission mode cell, the mini-packet has a virtual path identifier (VPI) / virtual channel identifier (VCI) of the mini-packet header. The quality of service label is included. The quality of service label is assigned with user parameter control (UPC) and routing information of the network.

The access system 233 assigns a quality of service label to the input first packet data in1 and then assigns a routing tag including routing information for the input first packet data in1. After allocating a quality of service label and a routing tag to the input first packet data in1, the access system 233 assigns the input first packet data in1 to a predetermined unit, for example, 48 bytes. Segmentation is performed on a per-unit basis to divide the 48-byte mini-packets, and then includes the allocated quality of service label and routing tag in the header portion of the divided mini-packets. The mini-packets added with the quality of service quality label and the routing tag as headers are stored in the input queue 411 in the order of generation, and the mini-packets stored in the input queue 411 are stored in the quality of service. The rank labels are extracted in the order of high priority and are output to the switch 413. Here, the input queue 411 has a first input first output (FIFO) structure, and if the priority of the quality of service class labels of the mini-packets stored in the input queue 411 is the same, the pre-input mini Packets are pre-printed. As a result, routing can be made by considering the priority according to the quality of service for the input packet.

The routing processor 400 analyzes the header portion of the mini-packets input to the switch 413, and the switch 413 schedules traffic according to the quality of service priority according to the analyzed header information of the mini-packets. The traffic is output to the re-assembly queue 415 by traffic scheduling. The reassembly queue 415 inputs the mini-packets output from the switch 413, examines the headers of the input mini-packets, removes the routing tag of the header portion, and reassembles them. A packet is output to the output queue 417. Then, the access system outputs a packet having a high quality of service priority among the packets stored in the output queue 417 to the physical framer. Here, the packets stored in the output queue 417 are the label packet data in which the routing tag is removed in the reassembly process, and only the quality of service class label is added.

Eventually, the access system 233 assigns an incoming packet to a quality of service class label and routing tag according to priority, and segments the input packet to generate a plurality of mini-packets, and generates the generated mini-. By including the quality of service label and the routing tag in the header portion of the packets, the traffic is scheduled and routed in the same manner as the asynchronous transmission mode cell processing. In order to consider the priority according to the quality of service class, the routing tag is removed from the generated mini-packet in order to support the data generated in the form of mini-packet to be compatible with the external network supporting the Internet protocol. Only the label is reassembled in a given form and output in the form of a packet. Thus, packet transmission in consideration of both the input order and the quality of service class is possible.

5 is a block diagram showing an internal configuration of an access system according to an embodiment of the present invention.

5 through any Ethernet, i.e., an Ethernet line, from any subscriber as shown in FIG. 511 and Packet data is input through 515, and the packet data thus input is routed to the corresponding output port through the mini-packet switch 513 according to predetermined control. Thus, since the data output from the mini-packet switch 513 transmits the data from the access system to the outside through the synchronous optical network, the line (POS-OC12, POS-OC3) 517 of the synchronous optical network. Is transmitted in the form of optical data. In addition, the access system interfaces with an operator and an operator terminal 521, and the operator terminal 521 is connected to a main control processor (MCU) 519 of the access system to control various types of the access system. Interface the information. The main control processor 519 updates processor information between the access system and the core system, controls the overall operation of the access system, and performs maintenance, maintenance, and operation of the access system.

6 is a diagram illustrating a core system structure according to packet data input and output according to an embodiment of the present invention.

The core system described with reference to FIG. 6 is commonly applied to all core systems implemented on the metro network according to the embodiment of the present invention described with reference to FIG. 2. This will be described as an example.

First, when the IP packet data, for example, input first packet data in 1 is input from a physical framer of the access system 233, the core system 227 may input the input first first data. The packet data in1 is segmented in a predetermined unit, for example, 48 bytes. In this way, the input first packet data in1 is segmented in a predetermined unit to generate a plurality of mini-packets. The core system 227 then translates a quality of service label included in the header of the generated mini-packets. In this case, converting the quality of service label is because the packet data transmitted from the access system 233 is label packet data including the quality of service label assigned according to the quality of service priority. The routing processor 600, which is a control unit of the control unit 227, detects the service quality class label transmitted on the label packet data and selects the service quality class label in consideration of the usage parameter control (UPC) for the input first packet data in1. Means to allocate. The routing processor 600 controls overall routing of data input / output to the core system 227, that is, routing according to quality of service priorities.

Then, the core system 227 allocates a routing tag including UPC (Usage Parameter Control) for the input first packet data in1 and routing information of the network. When the process of generating the input packet data into the mini-packets is completed, the detected quality of service label and the routing tag are added to the headers of the generated mini-packets. The mini-packets added with the quality of service label and the routing tag as headers are stored in the input queue 611 in the order of generation, and the mini-packets stored in the input queue 611 are stored in the service queue. The priority of the quality class label is extracted in the order of high priority, and is output to the switch 613. Here, the input queue 611 has a first input first output (FIFO) structure, and if the priority of the quality of service class labels of the mini-packets stored in the input queue 611 is the same, the pre-input mini Packets are pre-outputted. As a result, routing with priority given priority to quality of service on input packet data becomes possible.

The routing processor 600 analyzes the header portion of the mini-packets inputted to the switch 613 and schedules traffic according to the analyzed header information of the mini-packets according to the quality of service priority. Routing is output to the re-assembly queue 615. The reassembly queue 615 inputs the mini-packets output from the switch 613, examines the headers of the input mini-packets, and removes and reassembles the routing tag of the header part. Output one packet to the Output Queue 617. Then, the core system outputs the packet having the highest quality of service class priority among the packets stored in the output queue 617 to the physical framer of the backbone. Here, the packets stored in the output queue 617 are the state that the routing tag is removed in the reassembly process, and only the packet packet data to which only the quality of service class label is added.

As a result, the core system 227 assigns the quality of service packet and the routing tag according to the quality of service priority to the input packet data, and segments the input packet data to generate mini-packets. In the header portion of the mini-packets, the quality of service label and the routing tag are included in the traffic scheduling and routing in the same manner as the ATM cell processing. Thus, in order to consider the priority according to the quality of service class, the routing tag is removed from the generated mini-packets to support the mini-packets generated data with the external network supporting the Internet protocol. Only the label is reassembled in a given form and output in the form of a packet. Thus, packet transmission in consideration of both the input order and the quality of service class is possible.

7 is a block diagram showing an internal configuration of a core system according to an embodiment of the present invention.

As shown in FIG. 7, from the backbone of the network via Ethernet, ie, an Ethernet line Packet data is input via 711 or optical data via a synchronous optical network, i.e., via lines (POS-OC12, POS-OC3) 715 of the synchronous optical network. The mini-packet switch 713 then routes the data input through the Ethernet line 711 and the synchronous optical network line 715 according to a predetermined control and outputs the data to the corresponding output port. The mini-packet switch 713 transmits the optical data to the outside through the line (POS-OC192, POS-OC48) 717 of the synchronous optical network if the data to be output is optical data, and the data to be output In the case of an asynchronous transmission mode cell form, that is, a mini-packet form, the asynchronous transmission mode cell is transmitted to the outside through the asynchronous transmission mode line 719. In addition, the core system interfaces with an operator and an operator terminal 723, and the operator terminal 723 is connected to a main control processor (MCU) 721 of the core system to control various types of the core system. Interface the information. The main control processor 721 updates processor information between the core system and the access system, controls the overall operation of the core system, and performs maintenance, maintenance, and operation functions of the core system.

8 is a diagram illustrating a protocol stack of a data transmission system according to an embodiment of the present invention.

The data transmission system includes an access system (HNA) 800, 860, and a core system 820, 840. The access systems 800 and 860 may include Transmission Control Protocol (TCP) / UDP (User Datagram Protocol), Internet Protocol (IP), Synchronous Optical Network (SONET), and MPLS ( Multi-Protocol Label Switching) and a router (ROUTER). The core systems 820 and 840 are composed of a label distribution protocol (LDP) / routing function unit and a router. In addition, the access systems 800, 860, and core systems 820, 840 are connected to a physical layer through a router.

In the access system 800, when data to be transmitted is generated in an upper layer such as the TCP / UDP, the TCP / UDP lowers the data to be transmitted to the IP layer. Then, the IP layer transmits the data to the physical layer through a router through the synchronous optical network according to the destination of the data to be transmitted received from TCP / UDP. Then, the data routed through the router of the access system 800 is input to the router of the core system 820, and the router of the core system 820 uploads the received data to the upper layer LDP / routing function unit. give. Then, the LDP / routing function of the core system 820 is divided according to the destination of the data and routes to the corresponding destination, for example, the core system 840 or the access system 860 through its router.

9 is a diagram illustrating a routing structure according to a quality of service label according to an embodiment of the present invention.

10 illustrates a signal flow of a data transmission system according to an embodiment of the present invention.

FIG. 9 illustrates a data processing hierarchy structure between an access system and a core system during data transmission according to an embodiment of the present invention, and the signal flow diagram illustrated in FIG. 10 illustrates data having the hierarchy structure of FIG. 9 described above. It shows the signal flow in the transmission system, that is, the access system and the core system.

First, when data is transmitted from one subscriber, for example, host A 900 having port number 210.126.9.1 to another subscriber, for example, host B 950 having port number 203.253.2.104 (step 1011), The host A 900 transmits the generated data to the access system 1 910 in the form of IP packet data (step 1013).

The access system 1 910 receives the Internet protocol packet data from the host A 900, analyzes the input Internet protocol packet data, checks the priority of the quality of service (QoS), and selects a quality of service label. In addition, it analyzes the input Internet protocol packet data, determines an output port according to the routing information, and allocates a routing tag having the routing information (step 1015). After allocating the quality of service label and the routing tag, the access system 1 910 segments the input Internet protocol packet data by a predetermined unit, for example, by 48 bytes (step 1017). In step 1019, the mini-packet is generated by adding the service quality class label and the routing tag. The access system 1 910 then routes the mini-packet to which the quality of service class label and routing tag are added according to the quality of service priority (step 1021). The access system 1 910 routes the mini-packets according to the quality of service priority, and then reassembles the routed mini-packets into packet data by removing the routing tag from the header part (1023). step). Here, the reassembled packet data is labeled packet data, that is, label packet data, to which the quality of service label is added. The access system 910 transmits the reassembled label packet data through a corresponding output port (step 1025).

The packet data transmitted from the access system 1 910, that is, the label packet data, is transmitted to the core system A 920. The core system A 920 then analyzes the label packet data to which the quality of service class label received from the access system 1 910 is attached, determines an output port according to the routing information, and routes the routing information. Assign a tag (step 1027). The core system A 920 segments the label packet data by a predetermined unit, for example, by 48 bytes (step 1029), and adds the pre-assigned routing tag as header information to generate a mini-packet (1031). step). The core system A 920 routes the mini-packet to which the routing tag is added according to the quality of service priority (step 1033). As the mini-packet is routed according to the quality of service priority, the core system A 920 removes the routing tag from the header portion of the routed mini-packet and reassembles the packet into a packet data form (step 1035). . Here, the reassembled packet data is labeled packet data, that is, label packet data, to which the quality of service label is added. The core system A 920 transmits the reassembled label packet data through the corresponding output port (step 1037).

The packet data transmitted from the core system A 920, that is, the label packet data, is transferred to the core system B 930. Here, the reason why the core system A 920 transmits the label packet data to the core system B 930 is that the core system B 930 causes the host to transmit on the metro ring for reaching the host B 950. This is because it is a core system corresponding to B 950. The core system B 930 then analyzes the label packet data to which the quality of service class label received from the core system A 920 is attached, determines an output port according to the routing information, and routes the routing information. Assign a tag (step 1039). Then, the core system B 930 segments the packet data in a predetermined unit, for example, 48 bytes, and adds the pre-assigned routing tag as header information to form a mini-packet. Create (step 1043). The core system B 930 then routes the mini-packet to which the routing tag is added according to the quality of service priority (step 1045). As the mini-packet is routed according to the quality of service priority, the core system B 930 reassembles the routed mini-packet into the packet data form by removing the routing tag from the header part (step 1047). ). Here, the reassembled packet data is labeled packet data, that is, label packet data, to which the quality of service label is added. The core system B 930 transmits the reassembled label packet data through a corresponding output port (step 1049).

The packet data transmitted from the core system B 930, that is, the label packet data is transmitted to the access system 2 940. In this case, the core system B 930 transmitting the label packet data to the access system 2 940 may be performed by the access system 2 940 on the sub-ring for reaching the host B 950. This is because the access system drops the packet data at 950. Then, the access system 2 940 analyzes the label packet data to which the quality of service class label received from the core system B 930 is attached, determines an output port according to the routing information, and routes the routing information. Assign a tag (step 1051). Then, the access system 2 940 segments the label packet data in a predetermined unit, for example, 48 bytes, and generates a mini-packet by adding the pre-assigned routing tag as header information (step 1053). Step 1055). The access system 2 940 routes the mini-packet to which the routing tag is added according to the quality of service priority (step 1057). As the mini-packet is routed according to the quality of service priority, the access system 2 940 removes the routing tag from the header portion of the routed mini-packet (step 1059). Access system 2 940 then removes the quality of service label from the mini-packet from which the routing tag has been removed and reassembles it (step 1061). Here, the reassembled packet data is the same as the packet data (IP Packet), in which not only the routing tag but also the quality of service class label is removed, that is, the data generated in the host A 900. The access system 2 940 transmits the reassembled packet data to the host B 950 through the corresponding output port (step 1063). In operation 1065, the host B 950 receives the packet data transmitted from the host A 900. As described above, in the data transmission according to the embodiment of the present invention, as shown in FIG. 9, data processing is possible in the lower layer (up to layer 2) without involving the upper layer.

11 is a diagram illustrating an internal functional module of an access system according to an embodiment of the present invention.

First, a case in which packet data is input to the access system will be described.

First, any subscriber connects to the access system through an Ethernet line 1111, and the access system interfaces with the Ethernet line 1111 through an Ethernet Layer 2 i / f 1113. . Then, the packet data input through the Ethernet layer 2 interface 1113 is output to the packet quality class label assignment engine 1115. The packet SLA engine 1115 analyzes the packet data and assigns the quality of service label to the packet quality class label. The packet data assigned to the quality of service label is assigned to the packet user parameter control and routing engine. UPC, Routing Engine (1117). Then, the packet user parameter control and routing engine 1117 analyzes the packet data, allocates a routing tag with the user parameter control and routing information, and then returns the packet data to the packet segmentation engine 1119. ) Then, the packet segmentation engine 1119 generates the plurality of mini-packets by segmenting the packet data in a predetermined unit, each 48 bytes, and adding each quality of service label and routing tag to a header. The generated plurality of mini-packets are output to the packet priority control engine 1121. Then, the packet priority control engine 1121 inputs the plurality of mini-packets, controls their priority, and outputs them to the switch 1123. The switch 1123 outputs a plurality of mini-packets input from the packet priority control engine 1121 to the corresponding output ports according to the priority according to the control of the routing processor 1125. In this case, the routing processor 1125 refers to a routing table having the access system and core system related information and performs routing control according to its priority.

The plurality of mini-packets routed through the switch 1123 are output to a packet reassembly engine 1129. Then, the packet reassembly engine 1129 removes and reassembles each routing tag in the header portion of the plurality of mini-packets, and reassembles the packet packet data to which only the quality of service class label is assigned. In this way, the reassembled label packet data is output to a packet priority control engine 1131, and the packet priority control engine 1131 is a label output from the packet reassembly engine 1129. The packet data of the packet data is output from the label packet data having a high priority to the synchronous optical network layer 2 interface (SONET Layer 2 i / f) 1133. The synchronous optical network layer 2 interface 1133 then transmits the controlled label packet data to the core system via the optical synchronous network line 1135.

Secondly, a case in which label packet data is input to the access system will be described.

First, when label packet data is input from the core system through the optical synchronous network line 1135, the label packet data is input through the synchronous optical network layer 2 interface 1133. Then, the label packet data input through the synchronous optical network layer 2 interface 1133 is input to a packet user parameter control and routing engine 1137, and the user parameter control and routing control engine 1137 is the label packet data. After allocating the routing tag with the user parameter control and routing information, the label packet data is output to the packet segmentation engine 1139. Then, the packet segmentation engine 1139 segments the label packet data output from the packet user parameter control and routing engine 1137 in a predetermined unit, for example, in 48-byte units, and then a quality of service label and a routing tag in each header. Add to generate a plurality of mini-packets to output to the packet priority control engine 1141. The packet priority control engine 1141 then routes and outputs a plurality of mini-packets output from the packet segmentation engine 1139 to the switch 1123 according to their priority. The switch 1123 then routes the plurality of mini-packets output from the packet priority control engine 1141 to the packet reassembly engine 1143 under the control of the routing processor 1125. The packet reassembly engine 1143 inputs a plurality of mini-packets output from the switch 1123 to remove the routing tag from each header, and also removes the quality of service class label and reassembles the packet data. It then outputs to the packet priority control engine 1145. Then, the packet priority control engine 1145 transmits the packet data output from the packet reassembly engine 1143 to the corresponding subscriber via the Ethernet layer 2 interface 1113.

12 illustrates an internal functional module of a core system according to an embodiment of the present invention.

First, a case in which packet data is input from a backbone to the core system, and the input packet data is transmitted to an access system or another core system will be described.

First, the core system is connected to the core system through the Ethernet line 1211 from the backbone, and the core system interfaces with the Ethernet line 1211 through an Ethernet Layer 2 i / f interface 1213. Then, the packet data input through the Ethernet layer 2 interface 1213 is output to the packet quality class label assignment engine 1215. The packet SLA engine 1215 analyzes the packet data and assigns the quality of service label to the packet quality class label. The packet data assigned to the quality of service label is assigned to the packet user parameter control and routing engine. UPC, Routing Engine (1217). Then, the packet user parameter control and routing engine 1217 analyzes the packet data, allocates a routing tag with the user parameter control and routing information, and then returns the packet data to the packet segmentation engine 1219. ) Then, the packet segmentation engine 1219 segments the packet data in a predetermined unit, 48 bytes per day, and adds each quality of service label and routing tag to a header to generate a plurality of mini-packets, The generated plurality of mini-packets are output to a packet priority control engine 1221. Then, the packet priority control engine 1221 inputs the plurality of mini-packets to control the priority and output the same to the switch 1223. The switch 1223 outputs a plurality of mini-packets input from the packet priority control engine 1221 under the control of the routing processor 1225 to the corresponding output port according to the priority. Here, the routing processor 1225 refers to a routing table having the access system and core system related information and performs routing control according to the priority.

In addition, a plurality of mini-packets routed through the switch 1223 are output to a packet reassembly engine 1229. Then, the packet reassembly engine 1229 removes the routing tag from each of the input header parts of the plurality of mini-packets, and then reassembles the packet tag. In this way, the reassembled label packet data is output to a packet priority control engine 1231, and the packet priority control engine 1231 is a label output from the packet reassembly engine 1229. The packet data of the packet data is output from the label packet data having a high priority to the synchronous optical network layer 2 interface (SONET Layer 2 i / f) 1233. The synchronous optical network layer 2 interface 1133 then transmits the controlled label packet data to another core system or access system via the optical synchronous network line 1235.

Secondly, a case where label packet data is input from another core system or an access system to the core system, and the input label packet data is transmitted to the backbone will be described.

First, when label packet data is input through the optical synchronous network line 1235 from another core system or an access system, the label packet data is input through the synchronous optical network layer 2 interface 1233. Then, the label packet data input through the synchronous optical network layer 2 interface 1233 is input to a packet user parameter control and routing engine 1237, and the user parameter control and routing control engine 1237 is used to transmit the label packet data. After allocating the routing tag with the user parameter control and routing information, the label packet data is output to the packet segmentation engine 1239. Then, the packet segmentation engine 1239 segments the label packet data output from the packet user parameter control and routing engine 1237 by a predetermined unit, for example, by 48 bytes, and then a quality of service label and a routing tag in each header. Add to generate a plurality of mini-packets to output to the packet priority control engine 1241. The packet priority control engine 1241 then routes the plurality of mini-packets output from the packet segmentation engine 1239 according to their priority and outputs them to the switch 1223. The switch 1223 then routes the plurality of mini-packets output from the packet priority control engine 1241 to the packet reassembly engine 1243 under the control of the routing processor 1225. The packet reassembly engine 1243 inputs a plurality of mini-packets output from the switch 1223 to remove the routing tag from each header, and also removes the quality of service class label and reassembles the packet data. The packet is then output to the packet priority control engine 1245. The packet priority control engine 1245 then transmits the packet data output from the packet reassembly engine 1243 to the backbone through the Ethernet layer 2 interface 1213.

Third, a case where label packet data is input from another core system or an access system to the core system, and the input label packet data is transmitted to another core system or an access system will be described.

First, when label packet data is input from the other core system or the access system through the optical synchronous network line 1247, the label packet data is input through the synchronous optical network layer 2 interface 1249. Then, the label packet data input through the synchronous optical network layer 2 interface 1249 is input to a packet user parameter control and routing engine 1251, and the user parameter control and routing control engine 1251 is the label packet data. After assigning a routing tag with the user parameter control and routing information of, the label packet data is output to the packet segmentation engine 1253. Then, the packet segmentation engine 1253 segments the label packet data output from the packet user parameter control and routing engine 1251 in a predetermined unit, for example, in 48-byte units, and then assigns a quality of service label and a routing tag to each header. Add to generate a plurality of mini-packets to output to the packet priority control engine 1257. The packet priority control engine 1257 then routes and outputs the plurality of mini-packets output from the packet segmentation engine 1253 to the switch 1223 according to their priority. The switch 1223 then routes the plurality of mini-packets output from the packet priority control engine 1257 to the packet reassembly engine 1259 under the control of the routing processor 1225. The packet reassembly engine 1259 inputs a plurality of mini-packets output from the switch 1223, removes a routing tag from each header thereof, reassembles the packet tag, and then reassembles the packet data into a packet priority control engine 1261. Will print The packet priority control engine 1261 then transmits the packet data output from the packet reassembly engine 1259 to another core system or an access system through the optical synchronous network layer 2 interface 1263.

Fourth, a case in which label packet data is input from another core system or an access system to the core system and the label packet data is transmitted to the asynchronous transmission mode system will be described.

Here, a series of functional modules to which label packet data is input from the other core system or the access system, that is, the optical synchronous network layer 2 interface 1263 and the packet user parameter control, the routing engine 1265, and the packet segmentation engine 1267. The operations of the packet priority control engine 1269 include the optical synchronous network layer 2 interface 1247 and the packet user parameter control, the routing engine 1251, the packet segmentation engine 1253, and the packet priority control engine 1257 described above. ) And the description thereof will be omitted. As such, multiple mini-packets through the packet priority control engine 1269 are also routed through the switch 1223, and the routed mini-packets are input to the packet priority control engine 1271. Then, the packet priority control engine 1271 retrieves the header information of the input mini-packets and transmits the header information to the corresponding asynchronous transmission mode system through an ATM layer 2 i / f interface 1273. do. Here, the reason for transmitting the mini-packets to the asynchronous transmission mode system without special reassembly process is that the mini-packets are identical to the cell form of the asynchronous transmission mode system.

FIG. 13 is a flowchart illustrating an operation process of functional engines of an access system when transmitting packet data in a mini-packet according to an embodiment of the present invention, and will be described with reference to FIG. 11.

First, when packet data arrives from a physical framer, that is, packet data is input through the Ethernet layer 2 interface 1113 (step 1310), the packet data is sent to the packet quality of service label assignment engine 1115. Is output. Then, the packet quality class label assignment engine 1115 filters the packet data (step 1311) and assigns the corresponding service quality class label (step 1313). The packet quality class label assignment engine 1115 assigning the quality class label outputs the packet data to the packet user parameter control and routing engine 1117, and the packet user parameter control and routing engine 1117 User parameter control on the packet data is performed by inputting the packet data (step 1315) and the routing tag is allocated with reference to the routing information (step 1317). When the routing tag is allocated in this way, the packet user parameter control and routing engine 1117 outputs the packet data to the packet segmentation engine 1119, and the packet segmentation engine 1119 sends the service quality class label and routing of the packet data. Save the tag (step 1319). The packet segmentation engine 1119 segments the packet data by a predetermined unit, for example, by 48 bytes (step 1321), and adds the stored quality of service label and routing tag as headers to generate a plurality of mini-packets. And outputs the packet priority control engine 1121 (step 1323). Then, the packet priority control engine 1121 inputs a plurality of mini-packets output from the packet segmentation engine 1119 and retrieves the priority (step 1325). Store it in a queue (1327). Then, the packet priority control engine 1121 extracts sequentially from the mini-packets having the highest priority among the mini-packets stored in the queue (Step 1329). The mini-packets extracted according to the priority are respectively routed through the switch 1123 (step 1331).

In FIG. 13, an access system for converting and transmitting packet data generated from an arbitrary subscriber into a mini-packet is described as an example. Proceeds in the same manner as the operation process of.

FIG. 14 is a flowchart illustrating an operation process of functional engines of an access system in a case of converting a mini-packet into packet data and transmitting the packet according to an embodiment of the present invention. FIG.

First, when a plurality of mini-packets are routed from the switch 1123 (step 1411), the mini-packets are output to the packet reassembly engine 1143. Then, the packet reassembly engine 1143 analyzes the mini-packets inputted from the switch 1123, analyzes the input port of the mini-packet (step 1413), removes the routing tag, and then queues corresponding to the input port. Each of the two is stored in step 1415. Then, the packet reassembly engine 1143 extracts mini-packets from the queue, reassembles them, generates label packet data, and outputs them to the packet priority control engine 1145 (step 1417). The packet priority control engine 1145 analyzes the service grade of the label packet data (step 1419) and stores each of them in a corresponding queue according to the service grade (step 1421). The packet priority control engine 1145 then extracts the label packet data from the queues in order of high priority and transmits the label packet data to a packet data recovery engine (not shown) (step 1423). Then, the packet data restoration engine removes the label of the label packet data to restore the packet data (step 1425), and transmits the restored packet data to the physical framer to be transmitted to the corresponding subscriber (step 1427).

In FIG. 14, an access system for converting an input mini-packet and restoring the packet data to transmit to the subscriber is described as an example. However, the mini-packet input from the core system is converted and restored to packet data. The same case of transmitting the packet data to the backbone proceeds in the same way.

FIG. 15 is a flowchart illustrating an operation process of functional engines of a core system when routing an asynchronous transmission mode cell according to an embodiment of the present invention, and will be described with reference to FIG. 12.

First, when the ATM cell is input from the asynchronous transmission mode system through the physical framer (step 1511), the ATM cell is output to the packet quality class label assignment engine 1275. The packet quality of service label assignment engine 1275 filters the ATM cell (step 1513). Here, the filtering of the ATM cell means that the service class of the ATM cell is determined by searching for connection information of the ATM cell. The packet quality class label assignment engine 1275 then allocates the quality class label according to the determined service class (step 1515) and outputs the ATM cell to the packet user parameter control and routing engine 1277. The packet user parameter control and routing engine 1277 performs user parameter control on the input ATM cell (step 1517) and allocates a routing tag according to the routing information (step 1519). After allocating the routing tag, the packet user parameter control and routing engine 1277 outputs the ATM cell to the packet priority control engine 1279. Accordingly, the packet priority control engine 1277 transmits the ATM cell. The priority is determined by analyzing the result (step 1521). In this case, the ATM cell does not undergo a separate segmentation process because the ATM cell is already segmented in a predetermined unit, that is, a 48-byte unit, as the mini-packet described in the embodiment of the present invention. After the priority is determined, the packet priority control engine 1279 stores each in the corresponding queue according to the determined priority of the ATM cell (step 1523), and extracts the ATM cells from the queues having the highest priority. (Step 1525) and transmits to a switch 1223 (step 1527).

FIG. 16 is a flowchart illustrating an operation of a packet priority control engine when a mini-packet is transmitted to an asynchronous transmission mode system according to an embodiment of the present invention, and will be described with reference to FIG. 12.

If mini-packets are output from the switch 1223 shown in FIG. 12, the output mini-packets are input to the packet priority control engine 1271 (step 1611). The packet priority control engine 1271 then analyzes the input mini-packets and assigns the quality of service class label (step 1613). In this way, after allocating a quality of service label, the packet priority control engine 1271 stores the queue in a queue corresponding to the priority according to the assigned quality of service class in operation 1615. Then, the packet priority control engine 1271 extracts a high priority mini-packet by giving priority to the high priority queue (step 1617). Thus, the mini-packets extracted according to the priority are output to the physical framer to be transmitted to the asynchronous transmission mode system (step 1619). Here, the reason why the mini-packet is transmitted to the asynchronous transmission mode system without any conversion is because the mini-packet is the same as the cell form of the asynchronous transmission mode system.

FIG. 17 is a flowchart illustrating an operation process of function engines of a core system when transmitting input label packet data according to an embodiment of the present invention, and will be described with reference to FIG. 12.

First, when label packet data arrives from a physical framer, that is, label packet data is input through the synchronous optical network layer 2 interface 1233 (step 1711), the label packet data is controlled by packet user parameter control, routing. It is output to the engine 1237. The packet user parameter control and routing engine 1237 performs user parameter control on the input label packet data (step 1713) and allocates a routing tag according to the routing information (step 1715). After allocating the routing tag, the packet user parameter control and routing engine 1237 outputs the label packet data to the packet segmentation engine 1239. Then, the packet segmentation engine 1239 stores the quality of service label and the routing tag of the label packet data (step 1717) and segments the label packet data by a predetermined unit, for example, by 48 bytes (step 1719). A plurality of mini-packets are generated by adding the stored quality of service label and the routing tag to the header, respectively, and output to the packet priority control engine 1241. Then, the packet priority control engine 1241 inputs a plurality of mini-packets output from the packet segmentation engine 1239 and retrieves the priorities (step 1723). Save to queue (step 1725). The packet priority control engine 1241 then sequentially extracts the mini-packets having the highest priority among the mini-packets stored in the queue (step 1725). The mini-packets extracted according to the priorities are respectively routed through the switch 1223 (step 1729).

FIG. 18 is a flowchart illustrating an operation process of a reassembly engine and a priority control engine when transmitting label packet data to an access system or a core system according to an embodiment of the present invention. FIG. Shall be.

First, when a plurality of mini-packets are routed from the switch 1223 (step 1811), the mini-packets are output to the packet reassembly engine 1229. The packet reassembly engine 1229 then analyzes the mini-packets input from the switch 1223 (step 1813), removes the routing tag, and stores the routing tag in the corresponding input port queue (step 1815). Then, the packet reassembly engine 1229 extracts the mini-packets from the input port queue, reassembles them, and outputs them in the form of label packet data (step 1817).

The reassembled label packet data is input to the packet priority control engine 1231, and the packet priority control engine 1231 analyzes the input label packet data and assigns the service quality class label (step 1819). ). In this way, after allocating a quality of service label, the packet priority control engine 1231 stores in a queue corresponding to the priority according to the assigned quality of service class (step 1821). Then, the packet priority control engine 1231 extracts the high priority label packet data by giving priority to the high priority queue (step 1823). Thus, the extracted label packet data according to the priority is output to the physical framer to be transmitted to the access system or the core system (step 1825).

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 the equivalents of the claims.

As described above, the present invention routes packet data according to a quality of service priority on a network system using an internet protocol, and thus supports a quality of service priority of packet data in a network system using an internet protocol (IP). To make it possible. Therefore, by enabling the differential transmission of packet data according to the service quality priority in the network based on the Internet protocol technology, it was impossible to control the speed according to the subscriber request, which is the biggest problem of the network based on the conventional Internet protocol technology. This will eliminate the problem and improve the quality of data transmission.

Claims (29)

In a transmission system supporting quality of service priorities in a network using the Internet protocol, Analyzing the first packet data input from the subscriber and assigning a quality of service label according to the service quality priority, the first packet data to the first mini-packets containing the quality of service label is included in the header information A first access system that generates and performs routing according to the quality of service priority, and then reassembles the first mini-packets and transmits the first minipacket packet as first label packet data attached only to the quality of service quality label; The first label packet data is received to determine an output backbone according to the routing information, and the first label packet data is generated as second mini-packets to perform routing according to the quality of service prior to the service. A first core system that removes the quality grade label, reassembles it back into the first packet data and sends it to the output backbone; Analyzing the second packet data input from the backbone of the network and assigning a service quality class label according to the service quality priority, and assigning the second packet data to the third mini- with the service quality class label included in the header information. A second core system for generating packets and performing routing according to the quality of service priority, and then reassembling the third mini-packets to transmit the second label packet data having only the quality of service label attached thereto; Receiving the second label packet data to determine the corresponding subscriber according to the routing information, and generating the second label packet data as fourth mini-packets to perform routing according to the quality of service priority and then the service And a second access system for removing the quality grade label, reassembling it into the second packet data, and transmitting the same to the corresponding subscriber. The method of claim 1, The first access system comprises; Analyzing the first packet data input from the subscriber and assigning a routing tag including a quality of service label according to the service quality priority and routing information of the first packet data, and controlling data routing according to the priority With the control unit, A mini-packet generator for segmenting the first packet data and generating first mini-packets with the first quality of service label and routing tag appended to each header; A switch for routing the generated first mini-packets according to the priority; And a reassembler that inputs the routed first mini-packets to remove the routing tag, reassembles the first mini-packets from which the routing tag is removed, and transmits the first mini-packet to the first core packet data. Transmission system, characterized in that. The method of claim 2, The quality of service label includes a user parameter control and network routing information of the first packet data. The method of claim 1, The first core system is; Examine the routing information of the received first label packet data to determine its output backbone, assign a routing tag including the routing information of the first label packet data, and prioritize the quality of service of the first label packet data A control unit controlling data routing according to A mini-packet generator for segmenting the first label packet data to generate a plurality of second mini-packets to which the routing tag is added to each header; A switch for routing the generated second mini-packet according to the priority; And a reassembler that inputs the routed second mini-packets, removes the routing tag and the quality of service label, reassembles the first packet data, and transmits the first packet data to the output backbone. The method of claim 4, wherein The quality of service label includes a user parameter control and network routing information of the first label packet data. The method of claim 1, The second core system is; Analyzing second packet data input from the backbone to allocate a routing tag including a service quality label according to the service quality priority and routing information of the second packet data, and to control data routing according to the priority. With the control unit, A mini-packet generator for segmenting the second packet data to produce a plurality of third mini-packets with the quality of service label and routing tag added to each header; A switch for routing the generated third mini-packets according to the priority; Inputting the routed third mini-packets to remove the routing tag, and reassembling the third mini-packets from which the routing tag has been removed into second label packet data and transmitting to the second access system. A transmission system configured. The method of claim 6, The quality of service label includes a user parameter control and network routing information of the second packet data. The method of claim 1, The second access system; Examine the routing information of the received second label packet data to determine the corresponding subscriber, assign a routing tag including the routing information of the second label packet data, and prioritize the quality of service of the first label packet data. A control unit controlling data routing according to A mini-packet generator for segmenting the second label packet data to generate a plurality of fourth mini-packets each having the routing tag appended to a header; A switch for routing the generated fourth mini-packets according to the priority; Remove the quality of service label and routing tag after inputting the routed fourth mini-packets, reassemble the fourth mini-packets from which the quality of service label and the routing tag have been removed into the second packet data; And a reassembly unit for transmitting to the subscriber. The method of claim 8, The quality of service label comprises a user parameter control and network routing information of the second label packet data. In a transmission system supporting quality of service priorities in a network using the Internet protocol, Analyzes the input packet data and assigns a quality of service label according to the quality of service priority, and generates the input packet data into a plurality of first mini-packets having the quality of service label included in a header to prioritize the priority. An access system for reassembling and transmitting the mini-packets into label packet data after performing routing according to the packet routing; Receive the label packet data, analyze the received label packet data to determine the output destination according to the routing information, and generate the label packet data into a plurality of second mini-packets to perform routing according to the priority. And a core system configured to reassemble the second mini-packets into the input packet data and transmit the second mini-packets to the output destination. A subscriber packet data transmission system for supporting quality of service priorities in a network using an internet protocol, A controller for analyzing packet data input from the subscriber and assigning a routing tag including a service quality label and packet data routing information according to the service quality priority, and controlling data routing according to the priority; A mini-packet generator for segmenting the input packet data to generate a plurality of mini-packets each having a quality of service label and a routing tag appended to a header; A switch for routing the generated mini-packets according to the priority; And a reassembler configured to input the routed mini-packets to remove the routing tag and to reassemble and transmit the removed mini-packets into label packet data. The method of claim 11, And the quality of service label includes user parameter control and network routing information of the packet data. A backbone packet data transmission system for supporting quality of service priorities in a network using an internet protocol, A controller for analyzing packet data input from the backbone and assigning a routing tag including a service quality class label according to the service quality priority and routing information of the packet data, and controlling data routing according to the priority; A mini-packet generator for segmenting the packet data to produce a plurality of mini-packets, each of which has a quality of service label and a routing tag appended to a header; A switch for routing the generated mini-packets according to the priority; And a reassembler configured to input the routed mini-packets to remove the routing tag and to reassemble and transmit the removed mini-packets into label packet data. The method of claim 13, And the quality of service label includes user parameter control and network routing information of the packet data. A first access system for routing the packet data input from the subscriber, a first core system for inputting data transmitted from the first access system to the backbone, and a second core for routing the packet data input from the backbone A transmission method for supporting a quality of service priority in a network using an internet protocol, comprising a system and a second access system for transmitting data input from the second core system to a corresponding subscriber. When the first packet data is input from the subscriber, the first access system analyzes the first packet data and assigns a service quality class label according to the service quality priority, and assigns the first packet data to the service quality class label. After generating a plurality of first mini-packets included in the header information and performing routing according to the priority, the first mini-packets are reassembled into first label packet data attached only to the quality of service class label. A first process of transmitting the first core system to the first core system; When the first label packet data is received, the first core system determines an output destination according to routing information of the first label packet data, and generates the first label packet data into a plurality of second mini-packets. Performing a routing according to priority, removing a quality of service label from the first mini-packets, reassembling it into the first packet data, and transmitting the first packet data to the output destination; When the second packet data is input from the backbone, the second core system analyzes the input second packet data, allocates a service quality class label according to the service quality priority, and assigns the second packet data to the service quality. After generating a plurality of third mini-packets in which a class label is included in header information and performing routing according to the priority, the third mini-packets are second label packet data added with only the quality of service class label. A third process of reassembling and transmitting to the second access system; When the second label packet data is received, the second access system determines a corresponding subscriber according to routing information of the second label packet data, and generates the second label packet data into a plurality of fourth mini-packets. And performing the routing according to the quality of service priority, removing the quality of service label, reassembling the packet to the second packet data, and transmitting the same to the corresponding subscriber. The method of claim 15, The first step is; Analyzing the first packet data and allocating a routing tag including a service quality class label according to the service quality priority and routing information of the first packet data; After assigning the class of service label and the routing tag, the first packet data is segmented by a predetermined unit to generate a plurality of first mini-packets having the assigned class of service class label and the routing tag added to each header. Process, Routing the generated first mini-packets according to the priority; Inputting the routed first mini-packets to remove the routing tag, and reassembling the first mini-packets from which the routing tag is removed into first label packet data and transmitting the first packet to the first core system. Characterized by the above. The method of claim 16, The quality of service label includes a user parameter control and network routing information of the first packet data. The method of claim 15, The second process is; Inspecting the routing information of the received first label packet data to determine an output destination thereof, and allocating a routing tag including the routing information of the first label packet data; Assigning the routing tag and segmenting the first label packet data in a predetermined unit to generate a plurality of second mini-packets to which the routing tag is added to each header; Routing the generated second mini-packets according to the priority; Removing the routing tag by inputting the routed second mini-packets, and then reassembling the second mini-packets from which the routing tag is removed into the first packet data and transmitting the second packet to the output destination. . The method of claim 18, The quality of service label includes a user parameter control and network routing information of the first label packet data. The method of claim 15, The third process is; Analyzing a second packet data input from the backbone and allocating a routing tag including a service quality class label according to the service quality priority and routing information of the second packet data; Assigning the quality of service label and the routing tag and segmenting the second packet data in a predetermined unit to generate a plurality of third mini-packets having the quality of service label and the routing tag added to each header; , Routing the generated third mini-packets according to the priority; Inputting the routed third mini-packets to remove the routing tag, and reassembling the third mini-packets from which the routing tag is removed into second label packet data and transmitting the second mini-packets to the second access system. Transmission method characterized in that. The method of claim 20, The quality of service label includes a user parameter control and network routing information of the second packet data. The method of claim 15, The fourth process is; Inspecting the routing information of the received second label packet data to determine an output destination thereof, and allocating a routing tag including the routing information of the second label packet data; Allocating the routing tag and segmenting the second label packet data in a predetermined unit to generate a plurality of fourth mini-packets each of which the routing tag is added to a header; Routing the generated fourth mini-packets according to the priority; Removing the routing tag by inputting the routed fourth mini-packets, and reassembling the fourth mini-packets from which the routing tag has been removed into the second packet data and transmitting the second packet to the output destination. Transmission method. The method of claim 22, The quality of service label includes a user parameter control and network routing information of the second label packet data. A core system for routing packet data input from a backbone and an access system for routing packet data input from the core system to a subscriber, the transmission method supporting quality of service priority in a network using the Internet protocol. In Analyzing packet data input from the backbone and assigning a quality of service label based on the quality of service priority and a first routing tag based on the routing information; Allocating the quality of service label and the first routing tag and segmenting the packet data to add the quality of service label and the first routing tag to generate a plurality of first mini-packets; Routing the generated first mini-packets according to the priority; Removing the first routing tag from each of the routed first mini-packets, and then reassembling the first mini-packets from which the first routing tag is removed into label packet data and transmitting the same to the access system. Transmission method characterized in that. The method of claim 24, Receiving the label packet data, the access system inspects the routing information of the label packet data to determine an output destination thereof, and assigns a second routing tag including the routing information of the label packet data; Allocating the second routing tag and segmenting the label packet data in a predetermined unit to generate a plurality of second mini-packets having the second routing tag added to each header; Routing the generated second mini-packets according to the priority; Removing the second routing tag by inputting the routed second mini-packets, and then reassembling the second mini-packets from which the second routing tag is removed into the packet data and transmitting the packet to the subscriber. How to. The method of claim 25, Wherein the first quality of service label is user parameter control and network routing information of the packet data, and the second quality of service label is user parameter control and network routing information of the label packet data. A transmission method for supporting quality of service in a network using an Internet protocol, comprising: an access system for routing packet data input from a subscriber; and a core system for routing packet data input from the access system to a backbone; , Analyzing packet data from the subscriber and allocating a first routing tag according to a quality of service label according to the quality of service priority and routing information thereof; After assigning the quality of service label and the first routing tag, the packet data is segmented into a predetermined unit to generate a plurality of first mini-packets, each of which is added to the header, the quality of service label and the first routing tag. Process, Routing the generated first mini-packets according to the priority; Removing the first routing tag by inputting the routed first mini-packets, and then reassembling the first mini-packets from which the first routing tag is removed into label packet data and transmitting the same to the core system. How to feature. The method of claim 27, The core system receiving the label packet data inspects the routing information of the label packet data to determine its output destination, and allocates a second routing tag including the routing information of the label packet data. Allocating the second routing tag and segmenting the label packet data in a predetermined unit to generate a plurality of second mini-packets having the second routing tag added to each header; Routing the generated second mini-packets according to the priority; Removing the second routing tag by inputting the routed second mini-packets, and reassembling the second mini-packets from which the second routing tag is removed into the packet data and transmitting the packet to the backbone as the output destination. Characterized by the above. The method of claim 28, Wherein the first quality of service label is user parameter control and network routing information of the packet data, and the second quality of service label is user parameter control and network routing information of the label packet data.