KR101020048B1 - Apparatus and method for packet classification in mobile communication system - Google Patents

Abstract

The present invention relates to an apparatus and method for classifying packets in a mobile communication system. In the packet classification method of the base station of the mobile communication system according to the present invention, for each of two or more Internet protocol (IP) packets for transmission to the terminal, a process of checking the IP version and service type using a header And classifying an IP version 4 (IP version 4) packet and an IP version 6 (IP version 6) packet supporting the same service into one connection that simultaneously supports both an IPv4 packet and an IPv6 packet, and And transmitting the IPv4 packet and the IPv6 packet supporting the same service to the terminal using one connection that simultaneously supports the classified IPv4 packet and the IPv6 packet.

Packet Classification, Classification, IPv4, IPv6, CS Specification

Description

Packet classification apparatus and method in mobile communication system {APPARATUS AND METHOD FOR PACKET CLASSIFICATION IN MOBILE COMMUNICATION SYSTEM}

1 is a diagram illustrating a packet classification method of a mobile communication system according to the prior art;

2 is a diagram illustrating a packet classification method of a mobile communication system according to the present invention;

3 is a flowchart illustrating a packet classification method of a base station in a mobile communication system according to the present invention;

4 is a flowchart illustrating a CS rule storage method of a terminal in a mobile communication system according to the present invention;

The present invention relates to a mobile communication system, and more particularly, to an apparatus and method for effective packet classification for an IPv4 / IPv6 dual stack terminal.

In a wireless communication system, when a terminal receives an Internet Protocol (IP) packet from a higher application, the base station receives the IP packet from a core network. The terminal or base station performs a packet classification function. Here, the packet classification function is a function of determining a connection for transmitting the received packet among a plurality of configurable connections, and the terminal or the base station can deliver the IP packet using the determined connection. Here, if the IP layer protocol used by the user is IP version 4 (hereinafter referred to as 'IPv4'), an IPv4 connection must be created, and in case of IPv6, IP version 6 (hereinafter referred to as 'IPv6') A connection must be created. That is, the IPv4 and IPv6 should occupy separate air resources.

Referring to FIG. 1, the base station sets a packet classification rule for IPv4 packet 1 101, IPv6 packet 1 103, IPv4 packet 2 105, and IPv6 packet 2 107 received from the core network. A packet classification function using the Set 109 is performed to determine the IPv4 connection 1 111 as the connection for transmitting the packet with respect to the IPv4 packet 1 101, and the packet with respect to the IPv6 packet 1 103. IPv6 connection 1 113 is determined as a connection to be transmitted, IPv4 packet 2 105 is determined, and IPv4 connection 2 115 is determined as a connection to transmit the packet, and IPv6 packet 2 107 is determined as the packet to be transmitted. IPv6 connection 2 117 is determined as a connection to transmit.

The terminal or the system according to a convergence sublayer (hereinafter referred to as 'CS') specification value transmitted through a Dynamic Service Addition Request (hereinafter, referred to as a 'DSA-REQ') message. A packet classification rule, that is, a CS rule, is extracted and stored in the DSA-REQ message, and the packet classification function is performed using the packet classification rule. Conventional CS specification values are defined separately for IPv4 and IPv6, as shown in Table 1 below. Accordingly, the terminal or system extracts IPv4 and IPv6 CS rules in one DSA-REQ message. It cannot connect to IPv4 and IPv6 types of IP packets.

CS Specification 0: Reserved
1: Packet, IPv4
2: Packet, IPv6
3: Packet, IEEE 802.3 / Ethernet
4: Packet, IEEE 802.1Q VLAN
5: Packet, IPv4 over IEEE 802.3 / Ethernet
6: Packet, IPv6 over IEEE 802.3 / Ethernet
7: Packet, IPv4 over IEEE 802.1Q VLAN
8: Packet, IPv6 over IEEE 802.1Q VLAN
9: ATM
10: Packet, IEEE 802.3 / Ethernet ^a with ROHC header compression
11: Packet, IEEE 802.3 / Ethernet ^a with ECRTP header compression
12: Packet, IP ^b with ROHC header compression
13: Packet, IP ^b with ECRTP header compression
14-255: Reserved

In this case, in order for a terminal using an IPv4 / IPv6 dual stack according to the prior art to use IPv4 and IPv6 services, for example, a user accesses an IPv4 homepage and simultaneously accesses an IPv6 homepage to use a service. In order to use a separate air resource (Air Resource), that is, to process the packet using the IPv4, IPv6 connection of each, which causes a problem of waste of air resources.

Accordingly, an object of the present invention is to provide a packet classification apparatus and method of a mobile communication system.

Another object of the present invention is to provide an effective packet classification apparatus and method for an IPv4 / IPv6 dual stack terminal in a mobile communication system.

Another object of the present invention is to provide an effective packet classification apparatus and method for providing an IPv4 / IPv6 service by sharing one air resource to an IPv4 / IPv6 dual stack terminal in a mobile communication system.

In accordance with an embodiment of the present invention, a packet classification method of a base station of a mobile communication system uses a header for each of two or more Internet protocol (IP) packets for transmission to a terminal. Checking the IP version and service type, and simultaneously performing both IPv4 and IPv6 packets for IP version 4 (IP version 4: IPv4) and IP version 6 (IP version 6: IPv6) packets that support the same service. Classifying into one supporting connection, and transmitting the IPv4 packet and the IPv6 packet supporting the same service to the terminal by using the one connection that simultaneously supports the classified IPv4 packet and the IPv6 packet. Characterized in that it comprises a.

According to an embodiment of the present invention to achieve the above object, a convergence sublayer (CS) rule storage method in a terminal of a mobile communication system, a dynamic resource allocation request for establishing a connection from a base station (Dynamic Service) When a Addition Request (DSA-REQ) message is received, a process of checking a CS specification value included in the message, and a value indicating that the CS specification value is a connection supporting one or more IP versions, And parsing the CS rules of one or more IP versions included in the message.
According to an embodiment of the present invention, a packet classification apparatus of a base station of a mobile communication system uses a header for each of two or more Internet protocol (IP) packets for transmission to a terminal. Means for checking the IP version and service type, and simultaneously for IPv4 and IPv6 packets for IP version 4 (IP version 4: IPv4) and IP version 6 (IP version 6) packets that support the same service. Means for classifying the connection into one supporting unit, and means for transmitting the IPv4 packet and the IPv6 packet supporting the same service to the terminal using one classified connection that simultaneously supports the classified IPv4 packet and the IPv6 packet. Characterized in that it comprises a.
According to an embodiment of the present invention to achieve the above object, a convergence sublayer (CS) rule storage device in a terminal of a mobile communication system, a dynamic resource allocation request for establishing a connection from a base station (Dynamic Service) Means for confirming a CS specification value included in the message when an Addition Request (DSA-REQ) message is received, and a value indicating that the CS specification value is a connection that supports one or more IP versions. And means for parsing the CS rules of one or more IP versions included in the message.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

Hereinafter, a packet classification apparatus and method of a mobile communication system according to the present invention will be described.

2 is an exemplary diagram illustrating a packet classification method of a mobile communication system according to the present invention.

Referring to FIG. 2, the base station sets a packet classification rule set 209 for IPv4 packet 1 201, IPv6 packet 1 203, IPv4 packet 2 205, and IPv6 packet 2 207 received from the core network. By performing a packet classification function using the IPv4 packet 1 (201) and IPv6 packet 1 (203) to determine the IPv4 / IPv6 connection 1 (211) as a connection to transmit the packets, the IPv4 packet 2 (205) For IPv6 packet 2 207, IPv4 / IPv6 connection 2 213 is determined as a connection for transmitting the packets. That is, it is determined to share a connection for IPv4 and IPv6 packets corresponding to the same service.

3 is a flowchart illustrating a packet classification method of a base station in a mobile communication system according to the present invention.

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Referring to FIG. 3, in step 301, the base station receives each IP packet to be transmitted from the core network to one or more terminals, and for each received packet, in step 303, the IPv4 and IPv6 packets supporting the same service are received. If there is an IPv4 and IPv6 packet corresponding to the same service, the IP packet is classified into a connection supporting both the IPv4 and IPv6 packets in step 305, and the flow proceeds to step 309. Classifies each connection that supports packets of the corresponding IP version. On the other hand, when there are no IPv4 and IPv6 packets corresponding to the same service, the base station classifies all packets into respective connections supporting packets of the corresponding IP version in step 307, and then terminates the algorithm according to the present invention. do.
Here, from the perspective of each IP packet, for each IP packet, the base station classifies an IPv4 / IPv6 packet using a version field of a header of the corresponding packet, and then, after the version field, A field is used to determine a connection for transmitting the divided packet according to the type of service. That is, the corresponding IP packet is mapped to a predetermined connection in a call setup procedure with the terminal.

On the other hand, when the terminal attempts to access the network, the base station performs the ranging (Ranging), basic capability negotiation (Basic Capability Negotiation), authentication (Authentication), registration (Registration) procedure, that is, the call setup procedure A DSA-REQ message for connection establishment is transmitted to the terminal. The DSA-REQ message may include connection related information such as a service flow ID (SFID), a connection ID (CID), a quality of service (QoS) parameter, and the corresponding connection. CS specification value indicating support for all or each IPv4 / IPv6 packet, and CS rule of the corresponding IP version. Here, the part related to the IP version of the CS rule is an IP source address (masked Source Address) and an IP destination address (masked Destination Address).

Here, the CS standard according to the present invention is defined as shown in Table 2 below.

CS Specification 0: Generic Packet Convergence Sublayer (GPCS)
1: Packet, IPv4
2: Packet, IPv6
3: Packet, IEEE 802.3 / Ethernet ^a
4: Packet, Reserved
5: Packet, IPv4 over IEEE 802.3 / Ethernet ^a
6: Packet, IPv6 over IEEE 802.3 / Ethernet ^a
7: Packet, Reserved
8: Packet, Reserved
9: ATM
10: Packet, IEEE 802.3 / Ethernet ^a with ROHC header compression
11: Packet, IEEE 802.3 / Ethernet ^a with ECRTP header compression
12: Packet, IP ^b with ROHC header compression
13: Packet, IP ^b with ECRTP header compression
14: Packet, IP ^b
15-31: Reserved

Here, IP ^b represents IPv4 & IPv6. According to the CS standard according to the present invention, as shown in Table 2, '14: Packet, IP ^b 'is added to the CS standard value of the DSA-REQ message, which means that the connection is independent of the IP version or the header compression. Specifies that the connection can handle both IPv4 and IPv6 packets. In this case, in order to support both IPv4 and IPv6 using one connection, the CS rule included in the DSA-REQ message includes both an IPv4 CS rule and an IPv6 CS rule.

4 is a flowchart illustrating a CS rule storage method of a terminal in a mobile communication system according to the present invention. Here, the terminal is a terminal capable of using IPv4 and IPv6 services using an IPv4 / IPv6 dual stack.

Referring to FIG. 4, first, the terminal attempts to access a network, performs a ranging, a basic capability negotiation, an authentication, and a registration procedure with a base station. In step 401, a DSA-REQ message for connection establishment is received from the base station. Thereafter, in step 403, the UE connects to a connection related information such as a service flow ID (SFID), a connection ID (CID), and a quality of service (QoS) parameter included in the message. Save it.

In step 405, the terminal checks the CS specification value included in the message, and supports only IPv6 or CS standard value indicating that the connection is a connection supporting only IPv4 (for example, '1'). It is checked whether the CS standard value (for example, '2') indicating a connection or the CS standard value (for example, '14') indicating a connection supporting both IPv4 and IPv6.

When the CS standard value indicating that the corresponding connection is a connection supporting only IPv4 is included in the message in step 405, the terminal parses an IPv4 CS rule included in the message in step 407. In step 409, the parsed IPv4 CS rule is stored in an IPv4 CS pool. On the other hand, when the CS specification value indicating that the connection supports only IPv6 is included in the message, the UE, in step 411, the CS rule of the corresponding IP version included in the message, that is, the IPv6 CS. The rule is parsed, and the process proceeds to step 413 to store the parsed IPv6 CS rule in an IPv6 CS pool. Finally, when the CS specification value, which indicates that the corresponding connection supports both IPv4 and IPv6, is included in the message, the UE determines both the IPv4 CS rule and the IPv6 CS rule included in the message in step 415. In step 417, the parsed IPv4 CS rule and the IPv6 CS rule are stored in the IPv4 CS pool and the IPv6 CS pool, respectively. As a result, both uplink and downlink connections are established, and the terminal is assigned an IP. As described above, the present invention can transmit both IPv4 and IPv6 CS rules in one DSA-REQ message to process both types of IPv4 and IPv6 IP packets in one connection. That is, one air resource may be shared to support both IPv4 and IPv6 services.

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Through the above process, the terminal is in a state capable of accessing the Internet, and when the terminal accesses the Internet using a specific program, IPv4 or IPv6 packets are generated. In this case, the terminal processes the generated packet through the following process. First, when a user wants to use an application program such as Internet Explorer, an IP packet arrives at a MAC layer of a terminal, and the MAC layer fills a version field of the received IP packet. Check it. In this case, when the version field is a predetermined value, for example, '4', the MAC layer uses information corresponding to IPv4 among CS rules stored in the pool, and the version field is another predetermined value, for example. In case of '6', the classification function is performed using information corresponding to IPv6 among CS rules stored in the pool. That is, the connection for transmitting the packet is determined according to the corresponding CS rule.
Thereafter, the terminal terminates the algorithm according to the present invention.

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 determined not only by the scope of the following claims, but also by the equivalents of the claims.

As described above, the present invention provides an effective packet classification method for providing an IPv4 / IPv6 service by sharing one air resource to an IPv4 / IPv6 dual stack terminal in a mobile communication system. In case of terminal using IPv6 and IPv6 simultaneously By using one connection, IPv4 and IPv6 traffic can be used to efficiently use limited air resources. In addition, by using the same number of connections can accommodate more terminals than the conventional, there is an advantage that can ultimately increase the system capacity.

Claims (24)

In the packet classification method of the base station of the mobile communication system, A process of checking an IP version and a service type by using a header for each of two or more Internet protocol (IP) packets for transmission to a terminal; Classifying an IP version 4 (IP version 4) packet and an IP version 6 (IP version 6) packet supporting the same service into one connection that simultaneously supports both an IPv4 packet and an IPv6 packet; And transmitting the IPv4 packet and the IPv6 packet supporting the same service to the terminal by using the one connection that simultaneously supports the classified IPv4 packet and the IPv6 packet. The method of claim 1, And classifying the remaining IPv4 packet and the IPv6 packet into a connection supporting the corresponding version of the IP packet. The method of claim 1, wherein the IP version of the packet, And checking using a version field of a header of the packet. The method of claim 1, wherein the service type of the packet is And checking using a field after the version field. The connection of claim 1, wherein the connection that simultaneously supports the IPv4 packet and the IPv6 packet is: Method that can handle both IPv4 and IPv6 packets regardless of IP version or header compression. In a method of storing a convergence sublayer (CS) rule in a terminal of a mobile communication system, When receiving a Dynamic Service Addition Request (DSA-REQ) message for establishing a connection from a base station, checking a CS specification value included in the message; Parsing a CS rule of at least one IP version included in the message when the CS specification value is a value indicating that the connection supports at least one IP version. The method of claim 6, And storing the parsed CS rules in a CS pool of a corresponding IP version, respectively. The method of claim 6, Parsing the CS rule of the corresponding IP version included in the message when the CS standard value is a value indicating that the connection supports only one Internet protocol (IP) version. Characterized in that. The method of claim 6, The DSA-REQ message may include a CS indicating a service flow ID (SFID), a connection ID (CID), a quality of service (QoS) parameter, and an IP version supported by the corresponding connection. And at least one of a specification value and a CS rule of a corresponding IP version. The connection of claim 6, wherein the CS standard value supports one or more IP versions. Method that can handle both IPv4 and IPv6 packets regardless of IP version or header compression. In the packet classification apparatus of the base station of the mobile communication system, Means for checking an IP version and a service type by using a header for each of two or more Internet protocol (IP) packets for transmission to a terminal; Means for classifying an IP version 4 (IP version 4) packet and an IP version 6 (IP version 6) packet supporting the same service into one connection that simultaneously supports an IPv4 packet and an IPv6 packet, And means for transmitting the IPv4 packet and the IPv6 packet supporting the same service to the terminal using one connection that simultaneously supports the classified IPv4 packet and the IPv6 packet. The method of claim 11, And means for classifying the remaining IPv4 packets and IPv6 packets into connections that support corresponding versions of the IP packets. The method of claim 11, wherein the IP version of the packet, And inspect by using a version field of a header of the packet. The method of claim 11, wherein the service type of the packet is And inspect by using a field after the version field. The method of claim 11, wherein the connection supporting the IPv4 packet and the IPv6 packet simultaneously, Device that can handle both IPv4 and IPv6 packets regardless of IP version or header compression. In a convergence sublayer (CS) rule storage device in a terminal of a mobile communication system, Means for confirming a CS specification value included in the message when a Dynamic Service Addition Request (DSA-REQ) message for establishing a connection is received from the base station; And means for parsing CS rules of one or more IP versions included in the message when the CS specification value indicates a connection supporting one or more IP versions. The method of claim 16, And means for storing the parsed CS rules in a CS pool of a corresponding IP version, respectively. The method of claim 16, And a means for parsing a CS rule of a corresponding IP version included in the message when the CS standard value is a value indicating that the connection supports only one Internet protocol (IP) version. Device characterized in that. The method of claim 16, The DSA-REQ message may include a CS indicating a service flow ID (SFID), a connection ID (CID), a quality of service (QoS) parameter, and an IP version supported by the corresponding connection. And at least one of a specification value and a CS rule of a corresponding IP version. The connection of claim 16, wherein the CS standard value supports one or more IP versions. Device that can handle both IPv4 and IPv6 packets regardless of IP version or header compression. The method of claim 1, The one connection is established through a Dynamic Service Addition Request (DSA-REQ) message transmitted by the base station to the terminal. Wherein the dynamic resource allocation request message includes a CS specification value indicating that the one connection is a connection supporting IPv4 and IPv6 simultaneously. The method of claim 21, The DSA-REQ message may include a CS indicating a service flow ID (SFID), a connection ID (CID), a quality of service (QoS) parameter, and an IP version supported by the corresponding connection. And at least one of a specification value and a CS rule of a corresponding IP version. The method of claim 11, The one connection is established through a Dynamic Service Addition Request (DSA-REQ) message transmitted by the base station to the terminal. Wherein the dynamic resource allocation request message includes a CS specification indicating that the one connection is a connection supporting both IPv4 and IPv6 simultaneously. The method of claim 23, The DSA-REQ message may include a CS indicating a service flow ID (SFID), a connection ID (CID), a quality of service (QoS) parameter, and an IP version supported by the corresponding connection. And at least one of a specification value and a CS rule of a corresponding IP version.

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