KR100798919B1 - Method for providing QoS by using the Flow Label in IPv6 Network for the multimedia service and System applying the same - Google Patents

Abstract

The present invention relates to a method for providing a quality of service using a flow label and a system using the same in providing a multimedia service in an IPv6 network. The QoS providing method of the present invention provides a method for providing a QoS connection from a destination in response to a call request signal from a source. Detecting session information from the transmitted call request response signal and transmitting the session information to a QoS providing server, wherein the QoS providing server receives the session information to generate a session key including a flow label, and the QoS information corresponding to the session key; Setting the message; transmitting, by the QoS providing server, the session key and QoS information to an IPv6 node, and transmitting the QoS setting completion information to the signaling connection server, wherein the signaling connection server receives the QoS setting completion information. And transmitting the received call request response signal to the source, and the IPv6 node And forwarding the incoming packet based on the transmitted session key and the QoS information, thereby making it easier to perform session classification and forwarding processing for which QoS is guaranteed by the kit value of the session of the IPv6 packet at the IPv6 node. Can be done.

IPv4, IPv6, Packet, Forwarding, QoS, Quality of Service, Flow Label, Flow Table

Description

Method for providing QoS by using the Flow Label in IPv6 Network for the multimedia service and System applying the same}

1 is a diagram showing a system capable of providing session quality of service (QoS) using a flow label in providing a multimedia service in an IPv6 network according to an embodiment of the present invention;

2 is a block diagram schematically showing the configuration of the signal connection server of FIG. 1 according to an embodiment of the present invention;

3 is a block diagram schematically illustrating a configuration of a QoS providing server of FIG. 1 according to an embodiment of the present invention;

4 is a flowchart illustrating a process of generating a session key using an IPv6 flow label and a corresponding QoS providing process according to an embodiment of the present invention;

5 is a diagram illustrating a detailed example of a QoS policy table stored in an IPv6 node according to an embodiment of the present invention;

6 illustrates an example of a request message format of a source IP (SIP) for a general IPv4 packet;

7 shows an example of a request message format of a source IP (SIP) for a general IPv6 packet;

8 illustrates a SIP message format for an IPv6 packet including flow label information according to an embodiment of the present invention.

9 is a block diagram illustrating in more detail the configuration of the IPv6 node of FIG. 1 in accordance with a preferred embodiment of the present invention; and

10 is a flowchart illustrating a packet forwarding process of an IPv6 node according to an embodiment of the present invention.

The present invention relates to a method of providing a Quality of Service (QoS) through session classification in an IPv6 (Internet Protocol version 6) network, and particularly, to classify sessions generated between terminals or nodes in providing a multimedia service in an IPv6 network. The present invention relates to a method for providing differentiated quality of service (QoS) for each session.

In general, the classification of each session in the IP network can be defined in various ways according to the division unit, but the Transmission Control Protocol (TCP / UDP) that can distinguish the network layer information such as IP address and the flow table of incoming packets / User Datagram Protocol) Defined using transport layer information such as port information.

For example, for IPv4 packets, the session breaks down to the source IPv4 address, destination IPv4 address, protocol number, TCP / UDP source port number, and TCP. It is defined using the destination TCP / UDP port number. Similarly, in the case of IPv6 packets, session classification may be defined as a source IPv6 address, a destination IPv6 address, a next header, a TCP / UDP source port number, and a TCP / UDP destination port number.

However, in the IPv6 packet, transport layer information (TCP / UDP source port number and TCP / UDP destination port number) exists in the form of an extended header according to the characteristics of the header type defined in the standard. If there are multiple extension headers, transport layer information is located at the end of each of the extension headers. Therefore, when there are multiple extension headers in an IPv6 packet, it is difficult to extract transport layer information at high speed on hardware.

Accordingly, if the beginning of the extension header is not transport layer information such as TCP or UDP for the IPv6 packet, only QoS is provided by the IPv6 source address, the IPv6 destination address, and the next header. There is a disadvantage that QoS cannot be controlled for each application.

In this case, since QoS is provided to sessions grouped into sessions that share the same next header between two terminals communicating with each other, from the viewpoint of QoS provision, it is possible to perform differentiated control on each session actually. There is no problem. In addition, if the payload is encrypted, such as an Encapsulating Security Payload (ESP) header in the IPv6 packet, there is a problem in that transport layer information cannot be extracted unless decryption is performed at each node.

A first object of the present invention for solving the above problems is to provide a method of providing a quality of service for providing a differentiated quality of service (QoS) for packets flowing on the IPv6 network node and a system using the same.

A second object of the present invention is to provide a service quality providing method for providing differentiated quality of service (QoS) for each session by classifying sessions created between terminals or nodes in providing a multimedia service in an IPv6 network, and a system using the same. To provide.

A third object of the present invention is to provide a session quality that can be easily distinguished from a high speed interface regardless of the presence or absence of the next header in an IPv6 network, and to provide differentiated quality of service (QoS) for each divided session. It is to provide a method and a system applying the same.

Signal connection server in the IPv6 network according to an embodiment of the present invention for achieving the above object, the call request signal for transmitting the call request signal to the destination detected by detecting the destination information from the call request signal transmitted from the source A transmission unit; A ring signal transmitter for receiving a ring signal transmitted from a destination receiving the call request signal, detecting the source from the ring signal, and transmitting the ring signal to the detected source; A session information transmitter configured to receive a call request response signal transmitted from the destination in response to the transmitted call request signal, detect session information, and transmit the detected session information to a QoS providing server that provides QoS (Quality of Service) ; And when the QoS setting completion information is received from the QoS providing server in response to the session key of the transmitted session information, transmits a call request response signal received from the destination to the source, so that the QoS is established between the source and the destination. And a call request response signal transmitter for establishing a guaranteed session.

Preferably, the session key includes a flow label of the session information. The session key further includes a source IP (SIP) address, a destination IP (DIP) address, and a Next Header value of the session information.

In the QoS setting by the QoS providing server, a session key for the session information is generated and QoS information corresponding to each of the session keys is set.

The QoS information includes at least one of traffic type information of a packet to be forwarded and transmitted by the session key, and bandwidth information.

QoS server according to an embodiment of the present invention for achieving the above object, based on the session information received for session establishment between the source and the destination in the IPv6 network includes a session key including a flow label (Flow Label) A session key generation unit for generating; A QoS setting unit for setting QoS (Quality of Service) information corresponding to the generated session key; A QoS setting information transmitting unit for transmitting the session key and the QoS information to an IPv6 node that forwards data packets between the source and the destination; And a QoS setting completion information transmitting unit which transmits QoS setting completion information corresponding to the session key to a signal connection server for relaying session setting between the source and the destination.

 The session key further includes a source IP (SIP) address, a destination IP (DIP) address, and a Next Header value of the session information. The QoS information includes at least one of traffic type information and bandwidth of a packet to be forwarded by the session key in the IPv6 node.

An IPv6 node according to the present invention for achieving the above object comprises: a header information detector for detecting header information from a packet flowing from an IPv6 network; A flow table for generating a session key including a flow label from session information between a source and a destination and setting QoS information corresponding to the session key to store QoS information and forwarding information provided from a QoS providing server to guarantee QoS; A flow table retrieval unit for retrieving a flow table entry corresponding to the session key of the header information from the flow table; A QoS / forwarding information detector for detecting QoS information and forwarding information corresponding to the session key of the header information from the flow table, when a flow table entry corresponding to the session key of the header information exists in the flow table; And a controller configured to forward the incoming packet according to the forwarding information based on the detected QoS information.

According to an embodiment of the present invention, if there is no flow table entry corresponding to the session key of the header information in the flow table, the IPv6 node may be configured to store a session key and QoS information provided by the QoS providing server. A QoS information detector for detecting QoS information on the incoming packet; And a forwarding information detector configured to detect forwarding information of the packet from an FIBv6 table including forwarding information corresponding to a routing path of the packet. Accordingly, the controller forwards the incoming packet according to the forwarding information detected by the forwarding information detector based on the QoS information detected by the QoS information detector.

The IPv6 node according to the embodiment of the present invention may further include a flow table entry generation unit generating an entry of the flow table using the QoS information detected by the QoS information detector and the forwarding information detected by the forwarding information detector. have.

IPv6 network system according to an embodiment of the present invention for achieving the above object, in response to the call request signal of the source to detect and transmit the session information from the call request response signal transmitted from the destination, the transmitted session information A signal connection server that transmits a call request response signal received from the destination to the source when the QoS setting completion information is received corresponding to the session key of the mobile station; QoS providing server which generates a session key including a flow label from the session information transmitted from the signaling connection server, sets and transmits QoS information corresponding to the session key, and transmits the QoS setting completion information to the signaling connection server. ; And an IPv6 node which updates a session key and QoS information transmitted from the QoS providing server to a QoS policy table and performs forwarding processing on the incoming packet based on the session key and the QoS information.

In order to achieve the above object, a method of providing quality of service (QoS) of an IPv6 network according to an embodiment of the present invention includes a session information from a call request response signal transmitted from a destination in response to a call request signal from a source server. Detecting and transmitting to the QoS providing server; Receiving, by the QoS providing server, the session information, generating a session key including a flow label, and setting QoS information corresponding to the session key; Transmitting, by the QoS providing server, the session key and the QoS information to an IPv6 node that performs packet forwarding processing, and transmitting setting completion information of the QoS information to the signaling server; When the signaling connection server receives the setting completion information of the QoS information, transmitting a call request response signal received from the destination to the source; And forwarding, by the IPv6 node, an incoming packet based on the session key and the QoS information transmitted from the QoS providing server.

Advantageously, the forwarding process of the IPv6 node comprises: detecting header information from the incoming packet; Retrieving a flow table entry corresponding to the session key of the header information from a flow table storing QoS information transmitted from the QoS providing server and forwarding information necessary for routing; If the flow table entry corresponding to the session key of the header information exists in the flow table, detecting QoS information and forwarding information corresponding to the session key of the header information from the flow table; And forwarding the incoming packet according to the forwarding information based on the detected QoS information.

In the method for providing quality of service (QoS) of an IPv6 network according to an embodiment of the present invention, if there is no flow table entry corresponding to the session key of the header information in the flow table, the session key and the QoS provided by the QoS providing server are provided. Detecting QoS information for the incoming packet from a QoS policy table storing information; Detecting forwarding information for the packet from an FIBv6 table including forwarding information corresponding to the routing path of the packet; And forwarding the incoming packet according to the forwarding information based on the detected QoS information.

The method of providing quality of service (QoS) of an IPv6 network according to an embodiment of the present invention further includes generating an entry of the flow table using the detected QoS information and forwarding information and updating the flow table.

According to the present invention as described above,

The present invention extracts session information from signals exchanged between communication devices for mutual communication connection, generates a session kit value including a flow label, sets corresponding QoS information, and sets a QoS policy table at an IPv6 node. In the node, it is possible to more easily perform session classification and forwarding processing of which QoS is guaranteed by a kit value of a session of an IPv6 packet. Also, as the kit value of the session including the flow label is generated and the corresponding QoS information is set, the flow table entry corresponding to the session kit value detected from the header information of the incoming IPv6 packet by the IPv6 node is determined from the flow table. Detects the QoS information and the forwarding information, and if there is no flow table entry, detects the QoS information and the forwarding information from the QoS policy table and the FIBv6 table and performs the forwarding process of the IPv6 packet according to the forwarding information based on the detected QoS information. As a result, it is possible to more easily perform QoS-guaranteed QoS forwarding processing in a high-speed interface regardless of whether a flow table entry corresponding to a session kit value of an incoming packet exists.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the same elements in the figures are represented by the same numerals wherever possible. In addition, detailed descriptions of well-known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.

The present invention uses a flow label and network layer information such as an IP address by providing a flow label in a signaling protocol such as a session initiation protocol (SIP) to provide QoS for multimedia services in an IPv6 network. We propose a system and method that can more easily classify sessions and provide QoS information for the divided sessions.

1 is a diagram illustrating a system capable of providing quality of service (QoS) for each session using a flow label in providing a multimedia service in an IPv6 network according to an exemplary embodiment of the present invention.

As shown, the IPv6 Quality of Service (QoS) providing system, the IPv6 node 140 in terms of forwarding, the signaling connection server 110 and QoS providing server 120 and the signal server (in terms of control of the IPv6 node 140) ( 110 and a database 130 shared by the QoS providing server 120.

The IPv6 node 140 guarantees the QoS for the destination transmission of the incoming data according to the session kit value including the flow label provided from the QoS providing server 120 and the QoS information corresponding thereto, in terms of forwarding. Performs the signal switching function. Here, the IPv6 node 140 generally means a router. The detailed configuration of the IPv6 node 140 will be described with reference to FIG. 9.

In addition, the IPv6 node 140 includes a QoS policy table and a Forwarding Information Base version 6 (FIBv6) table in which a flow table and provided session QoS configuration information are updated to perform a switching function for transmitting an incoming packet to a destination. . Here, the flow table means a packet classification information table predefined by the QoS policy. Therefore, the forwarding information and the QoS information are stored in the flow table corresponding to the session kit value of the packet. The QoS policy table refers to a table in which a session kit value including a flow label defined according to an embodiment of the present invention and QoS information corresponding thereto are set. The FIBv6 table refers to a table including forwarding information that is updated and stored according to routing path information of the routing table.

The signal connection server 110 provides a connection service for communication between the user 1 160 and the user 2 170 according to the received communication connection request. In the embodiment of the present invention, the signal connection server 110 transmits the received call request signal to the destination, transmits the ring signal received from the destination to the source, and receives the session information about the call request response signal from the destination. It transmits to the QoS providing server 120. In addition, the signal connection server 110 transmits the call request response signal received from the destination to the source when the QoS setting completion information for the session is received from the QoS providing server 120 in response to the transmitted session information.

2 is a block diagram schematically showing the configuration of the signal connection server 110 according to an embodiment of the present invention, the signal connection server 110 is a call request signal transmission unit 112, ring signal transmission unit 114, a session information transmitter 116, and a call request response signal transmitter 118.

The call request signal transmitting unit 112 detects a destination from the received call request signal and transmits the call request signal to the detected destination. The ring signal transmission unit 114 receives a ring signal received from a destination to which a call request signal is transmitted, detects a source from the ring signal, and transmits the ring signal to the source where the ring signal is detected.

When the session information transmission unit 116 receives a call request response signal for the call request signal transmitted from the destination that transmitted the ring signal, the session information transmitter 116 detects the session information and transmits the session information to the QoS providing server 120. The call request response signal transmitting unit 118 receives the QoS setting completion information for the session from the QoS providing server 120 in response to the session information transmitted from the session information transmitting unit 116. Send the response signal to the source.

The QoS providing server 120 sets a session kit value by adding a flow label to a kit value for a session of an IPv6 packet, and sets a QoS value for the set session kit value in order to classify the session for the IPv6 packet of the IPv6 node 140. To the IPv6 node 140.

3 is a block diagram schematically illustrating a configuration of the QoS providing server 120 according to an exemplary embodiment of the present invention. The QoS providing server 120 includes a session key generation unit 122 and a QoS setting unit 124. ), The QoS setting information transmitting unit 126 and the QoS setting completion information transmitting unit 128 may be configured.

The session key generation unit 122 generates a session key including a flow label based on the session information provided from the session information transmission unit 116 of the signal connection server 110. The QoS setting unit 124 sets QoS information corresponding to the session key generated by the session key generation unit 122.

The QoS setting information transmitter 126 transmits the QoS setting information set by the QoS setting unit 124 to the IPv6 node 140. When the QoS setting of the QoS setting unit 124 is completed, the QoS setting completion information transmitter 128 transmits the QoS setting completion information for the session to the signal connection server 110.

The database 130 stores and manages resources necessary for setting a session kit value for adding a flow label of the QoS providing server 120 and for setting a QoS value for the set session kit value. Accordingly, the QoS providing server 120 checks the resource information stored in the database 130 and, if there is an available resource, sets the QoS for the session.

Accordingly, in performing the multimedia service, the IPv6 node 140 detects forwarding information and QoS information from the corresponding table according to the presence or absence of a flow table (entry) corresponding to the session kit value included in the header of the received packet. Perform the forwarding (routing) process. If there is a flow table corresponding to the session kit value included in the header of the received packet, the IPv6 node 140 detects the forwarding information and the QoS information from the flow table to determine the packet according to the forwarding information based on the detected QoS information. Perform the forwarding process. If there is no flow table corresponding to the session kit value included in the header of the received packet, the IPv6 node 140 detects QoS information from the QoS policy table and detects forwarding information from the FIBv6 table to generate an entry of the flow table. The packet forwarding process is performed based on this.

4 is a flowchart illustrating a process of generating a session key using an IPv6 flow label and providing a corresponding QoS according to an embodiment of the present invention.

First, when the user 1 160 wishes to establish a session with the user 2 170, the user 1 160 transmits a “call request to the user 2 (INVITE)” message to the signal connection server 110 (S210). The signal connection server 110 receives a "call request to user 2 (INVITE)" message from the user 1 (160) and transmits it to the user 2 (170).

When the user 2 170 receives a "call request to the user 2 (INVITE)" message from the signal connection server 110, it transmits a ring message signal corresponding thereto to the signal connection server 110 (S230). . The signal connection server 110 transmits the ring message signal received from the user 2 170 to the user 1 160 (S240).

After the user 2 170 transmits the ring message signal, the user 2 170 transmits a response signal to the call request of the user 1 160 to the signal connection server 110 (S250). When the signal connection server 110 receives the call request response signal from the user 2 170, the signal connection server 110 transmits the IPv6 session information between the user 1 160 and the user 2 170 to the QoS providing server 120 (S260).

When the QoS providing server 120 receives the session information transmitted from the signaling connection server 11, the database 130 determines whether a session key including a flow label is set and whether resources required for setting QoS information corresponding thereto are available. Check it. If available resources exist in the database 130, the QoS providing server 120 generates a session key including a flow label by referring to the session information and sets QoS information corresponding to the generated session key (S270). The QoS providing server 120 transmits the generated session key and session QoS setting information to the IPv6 node 140 (S280). In addition, the QoS providing server 120 transmits the session QoS setting completion information according to the provided session information to the signal connection server 110 to inform that the QoS for the session can be provided (S282).

The IPv6 node 140 updates the session key and the session QoS setting information transmitted from the QoS providing server 120 in the QoS policy table to provide QoS for packets passing through the IPv6 node 140 (S290). . In addition, when the signal connection server 110 receives the session QoS setting completion information from the QoS providing server 120, the signal connection server 110 transmits the call request response signal received from the user 2 170 in step S250 to the user 1 160 (S292). ).

Accordingly, the IPv6 node 140 transmits the actual data between the user 1 160 and the user 2 170 via the IPv6 networks 60 and 70 by the QoS policy table in which the set session key and the QoS information are updated. Perform routing (298).

5 is a diagram illustrating a detailed example of the QoS policy table stored in the IPv6 node 140 according to an embodiment of the present invention.

As shown, the QoS policy table 200 is a table for providing QoS for multimedia traffic of IPv6 according to the present invention and may be generally configured as a hash table. The hash function may be used in various ways such as a commonly used cycle redundancy check (CRC) and eXclusive OR (XOR). The QoS policy table 200 may be composed of a key value 210 of the session, and QoS information 220 corresponding to each key value.

The session kit value 210 is composed of a source IP (SIP) address, a destination IP (DIP) address, a next header value, and a flow label (Flow ID) value. . The QoS information 220 is a QoS value for a session that matches a corresponding kit value, and includes a traffic type, bandwidth (B / W) information, and the like.

Referring to the drawing, as an example, the key value 210 of a session has a source IP (SIP) address of "2201: 056D :: 112E: 144A: 1E24", and a destination IP (DIP) address of "2202: 056C :: 102E." : 144A: 1E00 ", the next header is TCP, and the flow label value (Flow ID) represents" 80000 ". In this case, the QoS information 220 for the session kit value may indicate that the traffic type is "GR (Guaranteed Rate)" and the corresponding bandwidth is represented by 2 [Mbps]. As another example, the key value 210 of the session has a source IP (SIP) address of "2201: 056D :: 112E: 144A: 1E34" and a destination IP (DIP) address of "2202: 056C :: 102E: 144A: 1E01". ", The next header is TCP, and the flow label value (Flow ID) is" 90000 ". In this case, the QoS information 220 for the session kit value indicates the traffic type as "AR".

6 illustrates an example of a request message format of a source IP (SIP) for a general IPv4 packet.

As shown, the SIP request message 300 for an IPv4 packet consists of a request line 310, a plurality of headers 320, and a message body 330. .

The request line 310 shows what requirements are, what is the request for, and what protocol version is used.

Header 320 contains more detailed information about such requests contained in request line 310. The configuration of the header 320 is located in the order of the header name, colon, and values for the header. The originating user information and the receiving user information are used to generate such information.

The message body 330 is divided into a header and a blank line, and includes a description of the session. In the case of the message body 330, User 1 of "here.com" transmits audio information through the RTP protocol using "100.101.102.103" as an IPv4 address and "49172" as a UDP port. The speech information is composed of u-law PCM coding of 8 [KHz] (8,000 [Hz]).

7 is a diagram illustrating an example of a request message format of a source IP (SIP) for a general IPv6 packet.

As shown, the SIP request message 400 for an IPv6 packet is the same as for an IPv4 packet with a request line 410, a plurality of headers 420, and a message body ( 430). The SIP request message 400 for the IPv6 packet is different from IPv4 in that IP6 is used as an address form and an actual IPv6 address is used to distinguish between IPv4 and IPv6 protocols.

As such, the SIP message 400 for a general IPv6 packet includes only UDP port information including address information as in IPv4. Therefore, in case of setting session information in IPv6 node using only this information, even if there is any kind of next header for all IPv6 packets input from IPv6 node, it finds session information by finding 4 layer information such as UDP port. You should check. In practice, this is not easy to handle in hardware for high-speed interfaces of several Gbps. The SIP message format for the IPv6 packet to solve this disadvantage is shown in FIG.

8 illustrates a SIP message format for an IPv6 packet including flow label information according to an embodiment of the present invention.

As shown in FIG. 5, the SIP message 500 for the IPv6 packet proposed in the embodiment of the present invention includes a request line 510, a plurality of headers 520, and a message body as shown in FIG. 5. And a (Message body) 530.

Here, the SIP message 500 for the IPv6 packet of the present embodiment includes the flow label 540 as a field of the message body 530 to provide QoS for IPv6 multimedia traffic, and the QoS policy table of the IPv6 node 140. The flow label 540 is included in the session kit value 210 of 200.

9 is a block diagram illustrating in more detail the configuration of the IPv6 node 140 of FIG. 1 according to a preferred embodiment of the present invention.

As illustrated, the IPv6 node 140 includes a control unit 141, an input buffer 142, a header information detector 143, a flow table search unit 144, a flow table 145, a determination unit 146, and QoS. Forwarding information detector 147, output buffer 148, QoS information detector 153, QoS policy table 154, forwarding information detector 155, FIBv6 table 156, and flow table entry generator 157. It includes.

The controller 141 performs a function of controlling the overall operation of the IPv6 node 140. The input buffer 142 performs output buffering according to the input of the input IPv6 packet. The header information detector 143 detects header information of the IPv6 packet flowing into the input buffer 142. The flow table retrieving unit 144 retrieves a flow table entry corresponding to the session kit value of the header information detected by the header information detecting unit 143 from the flow table 145. The flow table 145 stores forwarding information and QoS information corresponding to the session kit value.

The determination unit 146 determines whether there is a flow table entry corresponding to the session kit value of the header information according to the search result of the flow table search unit 144.

The QoS / forwarding information detection unit 147 corresponds to the session kit value of the header information from the entry of the flow table 145 when there is a flow table entry corresponding to the session kit value of the header information according to the determination result of the determination unit 146. Detect forwarding information and QoS information.

The output buffer 148 buffers and outputs the packet output from the input buffer 142 under the control of the controller 141. The controller 141 transmits the packet introduced into the input buffer 142 based on the forwarding information and the QoS information detected by the QoS / forwarding information detector 147 as the flow table entry corresponding to the session kit value of the header information exists. To control the forwarding process through the output buffer 148.

On the other hand, when there is no flow table entry corresponding to the session kit value of the header information according to the determination result of the determination unit 146, the control unit 141 controls the QoS information detecting unit 153 and the forwarding information detecting unit 155 to control the QoS. Information and forwarding information are detected to control the forwarding process of the incoming packet.

In other words, the QoS information detecting unit 153 according to the control result of the control unit 141 does not exist in the flow table entry corresponding to the session kit value of the header information, the QoS proposed by the present invention Detects QoS information from policy table 154. The QoS policy table 154 stores session kit values including flow labels defined according to an embodiment of the present invention, and corresponding QoS information.

The forwarding information detection unit 155 forwards the FIBv6 table 156 when there is no flow table entry corresponding to the session kit value of the header information according to the determination result of the determination unit 146 under the control of the control unit 141. Detect information. The FIBv6 table 156 stores forwarding information of packets along a routing path.

The flow table entry generation unit 157 generates an entry of the flow table using the QoS information and the forwarding information detected by the QoS information detection unit 153 and the forwarding information detection unit 155. The controller 141 updates the flow table entry generated by the flow table entry generator 157 to the flow table 145.

10 is a flowchart illustrating a packet forwarding process of an IPv6 node 140 according to an embodiment of the present invention.

First, when the IPv6 packet is input to the input buffer 142 in order to provide QoS for multimedia traffic of IPv6 (S410), the controller 141 controls the header information detector 143 to introduce IPv6 into the input buffer 142. The header information of the packet is detected (S420). When the header information of the IPv6 packet is detected, the control unit 141 controls the flow table retrieval unit 144 to correspond to the session kit value of the header information detected by the header information detection unit 143 from the flow table 145. Search for an entry (S430).

When the search for the flow table entry corresponding to the session kit value of the header information is completed, the control unit 141 controls the determination unit 146 to correspond to the session kit value of the header information according to the search result of the flow table search unit 144. It is determined whether a flow table entry exists (S440).

If it is determined that the flow table entry corresponding to the session kit value of the header information exists according to the determination result of the determination unit 146, the control unit 141 controls the QoS / forwarding information detection unit 147 to determine the flow table 145. The forwarding information and the QoS information corresponding to the session kit value of the header information are detected from the entry (S450). When forwarding information and QoS information corresponding to the session kit value of the header information are detected from the entry of the flow table 145, the controller 141 controls the output buffer 148 to input based on the detected forwarding information and the QoS information. The IPv6 packet introduced into the buffer 142 is forwarded (S460).

If it is determined in step S440 that the flow table entry corresponding to the session kit value of the header information does not exist according to the determination result of the determination unit 146, the controller 141 controls the QoS information detector 153 to control the QoS policy table ( QoS information is detected from step 154 (S510). The controller 141 also controls the forwarding information detector 155 to detect forwarding information from the FIBv6 table 156 (S520).

Accordingly, when the QoS information and the forwarding information corresponding to the session kit value of the IPv6 packet header information are detected by the QoS information detection unit 153 and the forwarding information detection unit 155, the control unit 141 may execute the flow table entry generation unit 157. The control generates an entry of the flow table using the detected QoS information and the forwarding information (S530). In this case, the controller 141 preferably updates the flow table entry generated by the flow table entry generator 157 to the flow table 145. In addition, the controller 141 controls the output buffer 148 to forward the IPv6 packet introduced into the input buffer 142 according to the forwarding information and the QoS information of the flow table entry generated by the flow table entry generation unit 157. Process (S540).

In the above, specific preferred embodiments of the present invention have been illustrated and described. However, the present invention is not limited to the above-described embodiments, and any person having ordinary skill in the art to which the present invention pertains may make various modifications and equivalents without departing from the gist of the present invention attached to the claims. Other implementations may be possible. Therefore, the true technical protection scope of the present invention should be defined only by the appended claims.

According to the above, the present invention extracts session information from signals exchanged between communication devices for mutual communication connection, generates a session key value including a flow label, sets corresponding QoS information, and sets a QoS policy table at an IPv6 node. By setting to, it is possible to more easily perform session classification and forwarding processing in which QoS is guaranteed by the kit value of the session of the IPv6 packet in the IPv6 node.

Also, as the kit value of the session including the flow label is generated and the corresponding QoS information is set, the flow table entry corresponding to the session kit value detected from the header information of the incoming IPv6 packet by the IPv6 node is determined from the flow table. Detects the QoS information and the forwarding information, and if there is no flow table entry, detects the QoS information and the forwarding information from the QoS policy table and the FIBv6 table and performs the forwarding process of the IPv6 packet according to the forwarding information based on the detected QoS information. As a result, it is possible to more easily perform QoS-guaranteed QoS forwarding processing in a high-speed interface regardless of whether a flow table entry corresponding to a session kit value of an incoming packet exists.

Claims (22)

A call request signal transmitter for detecting destination information from a call request signal transmitted from a source and transmitting the call request signal to the detected destination information in an IPv6 network; A ring signal transmitter for receiving a ring signal transmitted from a destination receiving the call request signal, detecting the source from the ring signal, and transmitting the ring signal to the detected source; A session information transmitter configured to receive a call request response signal transmitted from the destination in response to the transmitted call request signal, detect session information, and transmit the detected session information to a QoS providing server that provides QoS (Quality of Service) ; And When the QoS setting completion information is received from the QoS providing server corresponding to the session key of the transmitted session information, the call request response signal received from the destination is transmitted to the source to ensure the QoS between the source and the destination. Signaling connection server, characterized in that it comprises a call request response signal transmitting unit for setting the session. The method of claim 1, And the session key comprises a flow label of the session information. The method of claim 2, The session key further includes a source IP (SIP) address, a destination IP (DIP) address, and a Next Header value of the session information. The method according to any one of claims 1 to 3, In the QoS setting by the QoS providing server, a session key for the session information is generated and QoS information corresponding to each of the session keys is set. The method of claim 4, wherein The QoS information server comprises at least one of traffic type (Traffic Type) information, and bandwidth (Band Width) information of the packet to be forwarded by the session key. A session key generator for generating a session key including a flow label based on session information received for session establishment between a source and a destination in an IPv6 network; A QoS setting unit for setting QoS (Quality of Service) information corresponding to the generated session key; A QoS setting information transmitting unit for transmitting the session key and the QoS information to an IPv6 node that forwards data packets between the source and the destination; And And a QoS setting completion information transmitting unit which transmits QoS setting completion information corresponding to the session key to a signal connection server for relaying session setting between the source and the destination. The method of claim 6, The session key further includes a source IP (SIP) address, a destination IP (DIP) address, and a Next Header value of the session information. The method of claim 7, wherein The QoS information server includes at least one of traffic type (Traffic Type) information and bandwidth (Band Width) of the packet to be forwarded by the session key in the IPv6 node. A header information detector for detecting header information from a packet flowing from an IPv6 network; A flow table for generating a session key including a flow label from session information between a source and a destination and setting QoS information corresponding to the session key to store QoS information and forwarding information provided from a QoS providing server to guarantee QoS; A flow table retrieval unit for retrieving a flow table entry corresponding to the session key of the header information from the flow table; A QoS / forwarding information detector for detecting QoS information and forwarding information corresponding to the session key of the header information from the flow table, when a flow table entry corresponding to the session key of the header information exists in the flow table; And And a controller configured to forward the incoming packet according to the forwarding information based on the detected QoS information. The method of claim 9, If there is no flow table entry corresponding to the session key of the header information in the flow table, QoS information for the incoming packet is detected from a QoS policy table storing the session key and the QoS information provided by the QoS providing server. QoS information detection unit; And And a forwarding information detector configured to detect forwarding information of the packet from an FIBv6 table including forwarding information corresponding to a routing path of the packet. Thereby, the control unit forwards the incoming packet according to the forwarding information detected by the forwarding information detector based on the QoS information detected by the QoS information detector. The method of claim 10, And a flow table entry generator configured to generate an entry of the flow table using the QoS information detected by the QoS information detector and the forwarding information detected by the forwarding information detector. The method according to claim 10 or 11, wherein The session key including the flow label provided by the QoS providing server further includes an IPv6 address, a destination IP address, and a next header value of the session information. Node. The method of claim 12, The QoS information provided by the QoS providing server may include at least one of traffic type information and bandwidth of the packet to be forwarded by the session key provided by the QoS providing server. IPv6 node. In response to the call request signal from the source, the session information is detected and transmitted from the call request response signal transmitted from the destination. When the QoS setting completion information is received corresponding to the session key of the transmitted session information, the call request received from the destination is received. Signal connection server for transmitting a response signal to the source; QoS providing server which generates a session key including a flow label from the session information transmitted from the signaling connection server, sets and transmits QoS information corresponding to the session key, and transmits the QoS setting completion information to the signaling connection server. ; And And an IPv6 node for performing forwarding processing based on the session key and the QoS information on the incoming packet by updating the session key and the QoS information transmitted from the QoS providing server to a QoS policy table. system. The method of claim 14, The session key further comprises a source IP (SIP) address, a destination IP (DIP) address, and a Next Header value of the session information. The method of claim 14, The QoS information includes at least one of traffic type information and bandwidth of the packet to be forwarded and transmitted by the IPv6 node according to a session key provided by the QoS providing server. IPv6 network system. The signaling connection server detecting session information from the call request response signal transmitted from the destination in response to the call request signal from the source and transmitting the session information to the QoS providing server; Receiving, by the QoS providing server, the session information, generating a session key including a flow label, and setting QoS information corresponding to the session key; Transmitting, by the QoS providing server, the session key and the QoS information to an IPv6 node that performs packet forwarding processing, and transmitting setting completion information of the QoS information to the signaling server; When the signaling connection server receives the setting completion information of the QoS information, transmitting a call request response signal received from the destination to the source; And And forwarding the incoming packet based on the session key and the QoS information transmitted from the QoS providing server, by the IPv6 node. The method of claim 17, The forwarding process of the IPv6 node, Detecting header information from the incoming packet; Retrieving a flow table entry corresponding to the session key of the header information from a flow table storing QoS information transmitted from the QoS providing server and forwarding information necessary for routing; If the flow table entry corresponding to the session key of the header information exists in the flow table, detecting QoS information and forwarding information corresponding to the session key of the header information from the flow table; And And forwarding the incoming packet according to the forwarding information based on the detected QoS information. The method of claim 18, If there is no flow table entry corresponding to the session key of the header information in the flow table, QoS information for the incoming packet is detected from a QoS policy table storing the session key and the QoS information provided by the QoS providing server. step; Detecting forwarding information for the packet from an FIBv6 table including forwarding information corresponding to the routing path of the packet; And And forwarding the incoming packet according to the forwarding information on the basis of the detected QoS information. The method of claim 19, And generating an entry of the flow table by using the detected QoS information and the forwarding information and updating the entry in the flow table. The method of claim 20, The session key further includes a source IP (SIP) address, a destination IP (DIP) address, and a Next Header value of the session information. The method of claim 21, The QoS information includes at least one of traffic type information and bandwidth of the packet to be forwarded and transmitted by the IPv6 node according to a session key provided by the QoS providing server. To provide quality of service (QoS) for IPv6 networks.

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