KR100693723B1 - Method for cotrolling Qulity of Service in IPv6 and system thereof - Google Patents

Abstract

The present invention relates to a QoS control method for each flow in IPv6 that can reduce the load of a router belonging to a destination node when transmitting and receiving predetermined data using IPv6 in an internet network. In the Internet network using the Internet protocol according to the present invention, the flow-specific QoS control method in IPv6, the first step of generating a flow level value of any length at any originating terminal in the Internet network using the Internet protocol ; A second step of giving the generated flow level value to a called party identifier field in a start message sent from the calling party terminal to a specific called party terminal; A third step of reserving network resources between the calling terminal and the called terminal based on the flow level value; And when the reservation of the network resource is completed, a response message (OK) transmitted from the called terminal is transmitted to the calling terminal, and an acknowledgment message (ACK) sent from the calling terminal is sent to the called terminal. And a fourth step of establishing a media connection between the called terminal and the calling terminal.

Description

Method for cotrolling Qulity of Service in IPv6 and system}

1 is a block diagram of a general packet.

2 is a network diagram for explaining an efficient use of a general flow level.

FIG. 3 is a view for explaining a flow level value as a called party Call-ID value in a QoS control method for each flow in IPv6 according to the present invention; FIG.

4 is a time flow diagram illustrating a SIP message exchange procedure generated between a calling terminal and a called terminal in a flow-specific QoS control method in IPv6 according to the present invention.

5 is a state diagram illustrating a process of reserving network resources using flow level values in a QoS control method for each flow in IPv6 according to the present invention.

<Description of Symbols for Major Parts of Drawings>

30: caller terminal 31: the application

40: SIP server 45: network resource management server

50: called party terminal 60: access network resource management server

70: access node 80: access network

90a, 90b, 90c: Edge Router 100: IP / MPLS Network

The present invention relates to Internet Protocol Version 6 (IPv6), and more particularly, when a lot of traffic load is applied to the entire communication network, flow in IPv6 suitable to reduce the load of a router located in the area of the called terminal. It relates to a QoS control method for each.

In general, IP (Internet Protocol) is a protocol used to send data from one computer to another on the Internet. Because a message is sent in multiple packets, each packet can be sent through a different path if necessary. The packets may arrive in a different order than the original send order. However, IP only delivers these packets, and it is up to TCP, another protocol, to properly rearrange out of order packets.

Since IP is a connectionless protocol, it means that no connection is established between them during communication. Each packet is treated as an independent unit as it passes through the Internet and has no correlation with other packets. In the OSI model, IP belongs to the third layer, the network layer.

The most widely used version of IP is version 4, commonly referred to as IPv4. Recently, however, version 6, IPv6, has also started to be used, and its use is growing. This IPv6 can support more users by providing a relatively longer Internet address than IPv4. IPv6 includes the capabilities of IPv4, and servers that can support IPv6 can also handle IPv4 packets.

However, in the current IPv4, when a specific calling terminal transmits packet data to a specific called terminal through the Internet network, the packet includes a calling address, a called address, respective ports, and a flow level. . At this time, when a predetermined packet arrives at the router in the area of the called terminal, the router must perform a sufficient amount of processing to determine the final destination of the received packet. In order to identify, it must process information beyond IP layer which is the third layer of communication layer.

Therefore, in a specific communication environment such as an area where traffic load is concentrated or a time zone, a load of a corresponding router is delayed due to a procedure in which a called terminal handles identification of a flow, and accordingly, a packet data transmitted and received through an entire Internet communication network is delayed. There was a problem that the transmission speed is delayed.

Accordingly, the present invention has been made to solve the above-mentioned problems. When transmitting and receiving predetermined data using IPv6 in the Internet network, by registering and transmitting a flow identifier in a SIP message, a router load for flow classification is reduced. For the purpose of

Another object of the present invention is to provide a QoS control method for each flow in IPv6 which can reduce the load on the destination router, reduce the load of the overall communication system, and provide stable Internet service.

In order to achieve the above object, a flow-specific QoS control method in IPv6 according to a preferred embodiment of the present invention includes a first method for generating a flow level value of an arbitrary length in an arbitrary originating terminal in an Internet network using an Internet protocol. step; A second step of giving the generated flow level value to a called party identifier field in a start message sent from the calling party terminal to a specific called party terminal; A third step of reserving network resources between the calling terminal and the called terminal based on the flow level value; And when the reservation of the network resource is completed, a response message (OK) transmitted from the called terminal is transmitted to the calling terminal, and an acknowledgment message (ACK) sent from the calling terminal is sent to the called terminal. And a fourth step of establishing a media connection between the called terminal and the calling terminal.

Preferably, in the present invention, the third step may include: a 3-1 step of determining the QoS of the traffic based on the flow level value; A step 3-2 of transmitting flow-specific control information according to the QoS to an edge router; And a third to third steps of controlling the resource such that the QoS router considers QoS based on the control information.

In addition, the QoS control system for each flow in IPv6 according to an embodiment of the present invention, the originating SIP terminal for requesting the SIP call origination using the SIP message registered the flow level value; A SIP server for acquiring a flow level value from the SIP message, transmitting the flow level value to a network resource reservation server, and calling a destination SIP terminal for the SIP call to establish a media connection between the SIP terminals; And a network resource reservation server for reserving network resources corresponding to the QoS of the flow level when a flow level value, information of the calling SIP terminal, and information of the called SIP terminal are transmitted from the SIP server. It features.

Preferably, in the present invention, the calling SIP terminal registers the flow level value in the called party identifier field Call-ID of the SIP message INVITE.

In addition, the network resource reservation server in the present invention, the access network management server for managing the network according to the network resource reservation; And a network management server for executing the reservation for the network resource.

According to the QoS control method and system for each flow in IPv6 according to the present invention as described above, the flow level value generated by the originating terminal is assigned to the called party identifier field in the start message sent to the called terminal, and then traffic is transmitted at this flow level. Since the level is checked and the load of the final router is adjusted according to the confirmed result, there is an advantage of reducing the traffic load of a predetermined time or a predetermined area of the Internet network and stably providing Internet services.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention in more detail.

In general, in a network transmitting data using IPv6, IP (Internet Protocol) treats each message independently when sending a message through the network to the destination of the called party. By convention, packets sent by IP are called datagrams. Each datagram starts in the general format as shown in FIG.

In FIG. 1, the Version field 11 contains the version of the IP of each IP datagram, the Priority field 12 indicates the priority of the datagram, and the Flow Label field 13 is 24 bits. It checks the special traffic flow in the network along with the source address. In addition, the Payload Length field 14 indicates the total length of the IP datagram in bytes, less than the IP default header itself, and the Next Header field 15 indicates which header follows the default IP header in the datagram. The Hop Limit field 16 determines how far the datagram will be sent. In addition, the Source Address field 17 and the Destination Address 18 are the last fields of the basic IP head, and are addresses of the source and destination, each of which is a 128-bit network address.

FIG. 2 is a diagram illustrating two traffic flows across a simple network, and illustrates two traffic paths. The first is traffic from the Mac 21 to the minicomputer 25 via the ATM network 23, and the second is from the personal computer 22 to the workstation through the ATM network 23. (Workstation) 26 traffic. All traffic of a particular flow must require the same processing on the network. Thus, all datagrams must have the same destination, and they must contain the same options for routers on the path.

Referring to Fig. 2, when a given datagram arrives at router 24 in the area of destination terminal 25, or 26, router 24 determines that the datagram has a sufficient amount to determine where to go next. Processing should be done. However, if the datagram contains a flow level, the router 24 may decide to store the processing result of the datagram. In this way, router 24 then understands datagrams from Mac 21 with flow level 1, while router 24 only consults a simple table in memory.

As described above, when a predetermined caller and a receiver terminal transmit and receive a predetermined datagram using IPv6 in the Internet, the flow level included in the datagram is checked to identify a specific traffic flow in the network.

FIG. 3 stores an arbitrary flow label value generated at a calling terminal as a call-ID value in a SIP INVITE of a calling terminal regardless of a flow level field of a datagram. It shows. In this case, since the call-ID value is generated as an arbitrary bit value at the calling terminal, it may be used instead as the flow level value.

In general, the flow level value is any 20 bits, expressed as a hexadecimal value. Therefore, when generating a start message (SIP INVITE) from the SIP client of the calling terminal, a new flow level that can be assigned to the called party ID (Call-ID) value of the called terminal is generated. You can provide a concept.

4 is a time flow diagram illustrating a SIP message exchange procedure generated between a calling terminal and a called terminal in a flow-specific QoS control method in IPv6 according to the present invention.

In the calling terminal 30, the flow level value is stored as the called party identifier (Call-ID) value in the start message SIP INVITE in the manner shown in FIG. A start message (INVITE) for 50) is transmitted (S1).

The SIP server 40 transmits the received start message INVITE to the called terminal 50 (S2), and the called party ID (Call-ID) value of the calling terminal 30 (actually a flow level value). And, the location information for each terminal of the calling party and the called party is transmitted to the network resource management server 45 to request network resource reservation (S3).

Accordingly, the network resource management server 45 transmits a network resource response to the SIP server 40 (S4).

Meanwhile, the called party terminal 50 transmits a notification message (Ringing) to the calling terminal 30 through the SIP server 40 in response to receiving the start message (SIP INVITE) (S5, S6), the subscriber When the hook-off state (HOOK-OFF) by, the SIP server 40 transmits a response message (OK).

The SIP server 40 receiving the response message (OK) requests the network resource allocation to the network resource management server 45 (S8), and the network resource management server 45 responds to the network resource allocation response to the SIP server 40 (S9). Here, the network resource management server 45 applies a QoS policy based on the flow level value included in the call origination information, and executes reservation for the network resource so that the processing of the corresponding traffic is appropriate.

In addition, the SIP server 40 receiving the network resource allocation response from the network resource management server 45 transmits a response message (OK) to the calling terminal 30 (S10).

After receiving the response message (OK) from the SIP server 40, the calling terminal 30 transmits an acknowledgment message (ACK) to the called terminal 50 through the SIP server 40 (S11 and S12). .

Therefore, a media connection is established between the calling terminal 30 and the called terminal 50 from this time, and it is possible to perform a SIP telephone call between the calling terminal 30 and the called terminal 50 (S12).

5 is a state diagram illustrating a process of reserving network resources using flow level values in a QoS control method for each flow in IPv6 according to the present invention.

Referring to FIG. 5, the calling party terminal 30 stores the flow level value as a call-ID value of the SIP INVITE message in the manner shown in FIG. 3. The start message INVITE for the called terminal 50 is transmitted to the SIP server 40 through the program 31 (1, 2).

 The SIP server 40 stores network resource information of the calling party ID (call-ID) value (actually the flow level value) of the calling party terminal 30 and the location information of each of the calling party and the called party terminals 30 and 50. It transmits to the management server 45 (3).

The network resource management server 45 receiving the network resource reservation request from the SIP server 40 manages an access network management server that manages a network requiring network resource reservation based on the location information of the source and destination terminals 30 and 50. The network resource reservation request from the SIP server 40 and the flow level value of the originating terminal 30 are transmitted together (60) (4).

The access network management server 60 receiving the network resource reservation request from the network resource management server 45 sends the flow level value of the calling terminal 30 to the access node 70 and the quality of the service flow (QoS). (5) Grant a management policy.

At this time, the access node 70 identifies the traffic flow by the flow level value, and then applies the quality management policy from the access network resource management server 60 to the flow. The access node 70 transmits a response message indicating that the quality of service (QoS) management policy is applied to the network resource management server 45 through the access network management server 60 (6, 7).

Accordingly, the network resource management server 45 controls to apply the quality of service (QoS) policy to the edge routers 90b and 90c in its area in the same manner as the access network resource management server 60 (8, 9). In operation 10, the result message of the network resource reservation is transmitted to the SIP server 40.

In FIG. 5, the IP / MPLS network 100 performs an Internet protocol (IP) packet routing process only at the time of network input / output, and performs a high speed switching using a label inside the network to improve the performance of the IP network. Set the Label Switched Path, which is a logical channel, in the IP network operating in connectionless type so that the internal nodes of the network operate in connection type.

According to the present invention as described above, in the case of transmitting and receiving predetermined data using IPv6 in the Internet network, by registering the flow level value of the flow-specific identifier to the called party identifier that is generated and transmitted arbitrarily by the originating terminal through the SIP message Send to network resource management system. Therefore, since the network resource management system can process data according to the flow level value included in the received message, it is possible to greatly reduce the load of the router belonging to the area of the destination node.

Accordingly, it is possible to reduce the traffic load of a predetermined time or a predetermined region of the entire Internet network and to provide a stable Internet service.

On the other hand, the present invention is not limited to the above-described embodiment, but can be modified and modified within the scope not departing from the gist of the present invention, such modifications and changes should be regarded as belonging to the following claims. will be.

Claims (5)

In the Internet network using the Internet protocol, Generating a flow level value of an arbitrary length at any originating terminal; A second step of giving the generated flow level value to a called party identifier field in a start message sent from the calling party terminal to a specific called party terminal; A third step of reserving network resources between the calling terminal and the called terminal based on the flow level value; And When the reservation of the network resource is completed, a response message (OK) transmitted from the called terminal is transmitted to the calling terminal, and an acknowledgment message (ACK) sent from the calling terminal is sent to the called terminal, And a fourth step of establishing a media connection between the called terminal and the calling terminal. The method of claim 1, wherein the third step Determining a QoS of the traffic based on the flow level value; A step 3-2 of transmitting flow-specific control information according to the QoS to an edge router; And And a third step of controlling the resources such that the edge router considers the QoS based on the control information. An originating SIP terminal for requesting to originate a SIP call using a registered SIP message with a flow level value; A SIP server for acquiring a flow level value from the SIP message, transmitting the flow level value to a network resource reservation server, and calling a destination SIP terminal for the SIP call to establish a media connection between the SIP terminals; And And a network resource reservation server for reserving network resources corresponding to the QoS of the flow level when the flow level value, the information of the calling SIP terminal, and the information of the called SIP terminal are transmitted from the SIP server. QoS control system per flow in IPv6. The method of claim 3, wherein the calling SIP terminal is The flow control QoS control system in IPv6, wherein the flow level value is registered in a called party identifier field (Call-ID) of a SIP message (INVITE). 4. The network resource reservation server of claim 3, An access network management server for managing a network according to network resource reservation; And a network management server executing reservation for the network resource.

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