CN101399741B - Method, system and device for dynamically updating information of classifier - Google Patents

Abstract

The invention discloses a method for dynamically updating classifier information, comprising the following steps: the gateway receives the classifier information sent by the server; the gateway judges whether the dynamic information existence bit in the classifier information is set; , the gateway dynamically updates the classifier information according to the presence bit of the dynamic information. Through the embodiment of the present invention, the gateway updates the relevant parameters in the classifier information according to the classifier information set by the server, thereby making up for the defect that the existing technology cannot dynamically update the classifier information, and makes the existing The classification process is compatible with scenarios that rely on interface information for classification.

Description

A method, system and device for dynamically updating classifier information

technical field

The invention relates to the technical field of network communication, in particular to a method, system and device for dynamically updating classifier information.

Background technique

WiMAX (Worldwide Interoperability for Microwave Access) is a wireless metropolitan area network technology based on the IEEE 802.16 standard. The WiMAX network is mainly composed of three parts: client, ASN (Access Service Network, access service network) including BS (Base Station, base station) and ASN-GW (Access Service Network-Gateway, access service network gateway) and CSN (Connectivity Service Network, connection service network) includes logical entities such as PPS (Prepaid Server, prepaid server), AAA Server (Authentication Authority Account Server, authentication, authorization and accounting server), HA (Home Agent, home agent). The wireless side of the WiMAX network is a wireless metropolitan area network access technology based on the IEEE 802.16d/e standard. NWG (Network Working Group, the network working group of the WiMAX Forum) is responsible for formulating end-to-end network specifications. Its goals are: to establish an end-to-end network reference model to meet the needs of the WiMAX Forum operator working group; to formulate end-to-end network specifications , define the functional entities and network interfaces in the network; lay the foundation for the interoperability certification of the WiMAX system. The reference model of the NWG Stage2 network is shown in Figure 1. Wherein, the ASN includes two network elements, the BS and the ASN-GW.

Classification of services in the WiMAX system is mainly done through classifiers. ASN-GW realizes classification of downlink data by matching downlink classifiers, and MS (Mobile Subscriber, mobile subscriber) realizes classification of uplink data by matching uplink classifiers. The classifier can identify one or one type of services with the same QoS (Quality of Service, service quality) attribute. Existing classifiers mainly implement classification through certain parameters in the IP header, see Table 1. These parameters are configured on the AAA Server when the user signs up in the case of preset service flows, and sent to the ASN-GW through the authorization process; in the case of dynamic service flows, they are determined during the negotiation process of the application layer and passed through the policy server Send it to the ASN-GW.

Table 1

Classifier parameters meaning Priority The priority of the classifier determines the order of matching classifiers, and the classifier with high priority is matched first. IP TOS/DSCP Range and Mask The range and mask of the TOS/DSCP field in the IP header Protocol Protocol type in IP header IP Source Address and Mask Source IP address and mask in IP header IP Destination Address and Mask The destination IP address and mask in the IP header Source Port Range Source port range in IP header Destination Port Range Destination port range in IP header

The following downlink packets are taken as an example to illustrate the classification process of the classifier.

Assuming that a user has signed up for three services, Internet (Internet), Game, and VoIP (Voice over Internet Protocol, voice transmission based on IP network), these three services are classified according to the source address of the downlink message. The corresponding classifiers are:

VoIP: {Priority=1, IP Source Address and Mask=12.130.5.0/255.255.255.0}

Game: {Priority＝2, IP Source Address and Mask＝11.120.1.0/255.255.255.0}

Internet: {Priority=3, IP Source Address and Mask=10.110.10.0/255.255.255.0}

The relationship between the classifier and the user IP and DataPath is shown in Figure 2. When the ASN-GW receives a downlink data packet, it can locate the above three classifiers according to the destination IP (user IP) of the packet, and then according to the The priority matches each classifier one by one. If it matches a classifier successfully, the datapath corresponding to the classifier is used to forward the packet to the BS.

Although different services can be distinguished by setting the classifier template, in actual application, the specific parameters in the classifier template may not be available or difficult to collect and describe when setting the classifier, and need to be dynamically updated during the business process. For example, in the following two application scenarios, the classifier information cannot be obtained when setting the classifier.

1) An operator requires self-operated services to access the Internet directly through HA, Internet services, emergency calls and other services through the roaming gateway. Services can be distinguished by terminal IP, but the terminal IP cannot be obtained when setting the classifier, and the existing classifier does not have a relevant design for dynamic update.

2) An operator requires WiMAX ASN-GW to support the use of VLAN (Virtual Local Area Network) to classify services on the R3 interface. The operator believes that in order to ensure the security of services, different services are connected to the network through different tunnels. The R3 interface of ASN-GW can directly distinguish services based on the identifiers of these tunnels, such as VLAN ID (Virtual Local Area Network Identifier, virtual local area network identifier), GRE Key (Generic Routing Encapsulation Key, general routing encapsulation key), etc. However, only the IP header parameter information is contained in the existing classifiers, and the existing classification process by matching classifiers cannot be compatible with such a scenario of relying on connection or interface information for classification.

Therefore, the disadvantages of the prior art are: in actual application, the specific parameters in the classifier information cannot be obtained when the server sets the classifier, and the gateway cannot dynamically update the parameters of the classifier during the business process, and the existing The process of matching classifiers for classification cannot be compatible with scenarios that rely on interface information for classification.

Contents of the invention

Embodiments of the present invention provide a method, system and device for dynamically updating classifier information, so as to implement dynamic update of classifier information and enable the classifier information to support the scene of classifying based on interface information.

In order to achieve the above object, an embodiment of the present invention provides a method for dynamically updating classifier information on the one hand, including the following steps: the gateway receives the classifier information sent by the server; the gateway judges the dynamic information in the classifier information Whether the existence bit is set; if set, the gateway dynamically updates the classifier information according to the existence bit of the dynamic information.

On the other hand, an embodiment of the present invention also provides a system for dynamically updating classifier information, including: a server configured to set classifier information and deliver the classifier information; a gateway connected to the server, It is used to receive the classifier information issued by the server, and judge whether the dynamic information existence bit in the classifier information is set, and if it is set, dynamically update the classifier information according to the dynamic information existence bit.

In another aspect, the embodiment of the present invention also provides a server, including: an information setting module, configured to set classifier information; an information delivery module, connected to the information setting module, used to set the information setting module The classifier information is sent to the gateway.

In another aspect, the embodiment of the present invention also provides a gateway, including: an information receiving module, configured to receive the classifier information issued by the server; an information judging module, connected to the information receiving module, and used to judge the information Whether the dynamic information existence bit in the classifier information received by the receiving module is set; the information update module is connected with the information judgment module, and is used to dynamically update the dynamic information after the information judgment module judges that the dynamic information existence bit is set classifier information.

Compared with the prior art, the embodiment of the present invention has the following advantages: by adding dynamic information in the classifier information, the application of the classifier is more flexible, and the existing classification process by matching classifiers can be compatible and rely on connection or interface information for classification scenarios.

Description of drawings

Figure 1 is a reference model of the prior art NWG Stage2 network;

Fig. 2 is the relation diagram of prior art classifier and user IP, DataPath;

3 is a structural diagram of a system for dynamically updating classifier information according to an embodiment of the present invention;

4 is a flowchart of a method for dynamically updating classifier information according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of Embodiment 1 of a method for dynamically updating classifier information in the present invention.

Detailed ways

The embodiment of the present invention provides a method for dynamically updating classifier information. Through the embodiment of the present invention, the classifier is dynamically updated to make the application of the classifier more flexible. Processes are compatible with scenarios that rely on connection or interface information for classification.

As shown in FIG. 3 , it is a structural diagram of a system for dynamically updating classifier information according to an embodiment of the present invention, including a server 1 and a gateway 2 . The server 1 is used to set the classifier information, and deliver the classifier information to the gateway 2 through an authorization process. In the embodiment of the present invention, a dynamic information existence bit is added to the template of the classifier. When server 1 sets the classifier information, it will judge whether it is necessary to dynamically update the classifier information according to the classifier setting strategy and networking settings. If it is necessary to dynamically update the classification server information, the server 1 sets the dynamic information existence position. The dynamic information existence bit has two functions, one is to indicate which parameters in the classifier information the gateway 2 will dynamically update, and the other is to indicate which information is dynamic information to be matched when matching the classifier. The gateway 2 is connected to the server 1 for receiving the classifier information delivered by the server 1 . In the embodiment of the present invention, dynamic parameters related to interface information such as VPN ID (VirtualPrivate Network Identifier, virtual private network identifier), VLAN ID, GRE KEY, etc. are newly added in the classifier information. After judging that the dynamic information existence bit in the classifier information is set, the gateway 2 will update the parameters identified by the dynamic information existence bit when the service flow is established. When using the classifier to classify, these dynamically updated parameters can be used to distinguish different Business flow, and then realize the classification function.

The server 1 includes an update judgment module 11 , an information setting module 12 and an information delivery module 13 . Update judging module 11 is used for when classifier information is set, according to classifier setting policy and networking setting judges whether need to dynamically update classifier information, if needs to dynamically update classifier information, then notify information setting module 12 to store dynamic information bit. The dynamic information existence bit has two functions, one is to indicate which parameters in the classifier information the gateway 2 will dynamically update, and the other is to indicate which information is dynamic information to be matched when matching the classifier. The information setting module 12 is used to set the dynamic information presence bit in the classifier information when the update judgment module 11 judges that the classifier information needs to be dynamically updated. A method for setting the dynamic information presence bit in the embodiment of the present invention is shown in Table 2 shown. The information sending module 13 is connected with the information setting module 12, and is used for sending the classifier information set by the information setting module 12 to the gateway 2 through an authorization process.

Among them, the gateway 2 includes a relationship configuration module 21 , an information receiving module 22 , an information judging module 23 , an information updating module 24 , a classifier judging module 25 , a classifier issuing module 26 and a classifying module 27 . The relationship configuration module 21 is configured to configure the corresponding relationship between the service type and the interface information of the gateway 2, and the service type includes VoIP service, Game service or Internet service, etc. The information receiving module 22 is configured to receive the classifier information issued by the server 1 . In the embodiment of the present invention, dynamic parameters related to interface information such as VPN ID, VLAN ID, and GRE KEY are added to the classifier information. The meanings of these parameters are shown in Table 2. The information judging module 23 is connected with the information receiving module 22 and is used for judging whether the dynamic information existence bit in the classifier information received by the information receiving module 22 is set. The information update module 24 is connected with the information judging module 223, and is used for updating the parameter identified by the dynamic information existence bit when the service flow is established after the information judging module 23 judges that the dynamic information existence bit is set. Classifier judging module 25 is connected with information update module 24, and is used to judge whether the classifier corresponding to each service type is unique after information update module 24 has updated the classifier information; The judging module 25 is connected to send the classifier to the classifying module 27 after the classifier judging module 25 judges that the classifier corresponding to each business type is unique. The classification module 27 is connected to the classifier delivery module 26, and is used to classify the downlink data by matching the classifier delivered by the classifier delivery module 26.

Table 2

In Table 2, Dynamic Information Exist Flag, VPN ID, VLAN ID, and GRE KEY are classifier parameters newly added in the embodiment of the present invention. bit, then gateway 2 will dynamically update the VPN ID parameter when the service flow is established, and apply this parameter when classifying the packet.

As shown in Figure 4, it is a flowchart of a method for dynamically updating classifier information according to an embodiment of the present invention, which specifically includes the following steps:

In step S401, the gateway receives the classifier information delivered by the server. Before the server delivers the classifier information, the server will first set the classifier information. In the embodiment of the present invention, a dynamic information existence bit is added to the template of the classifier. When the server sets the classifier information, it will judge whether it is necessary to dynamically update the classifier information according to the classifier setting strategy and networking settings. If it is necessary to dynamically update the classifier information, the server sets the dynamic information existence bit. The dynamic information existence bit has two functions, one is to indicate which parameters in the classifier information the gateway will dynamically update, and the other is to indicate which information is dynamic information to be matched when matching the classifier. A method for setting the presence bit of dynamic information proposed by the embodiment of the present invention is shown in Table 2. After setting the classifier information, the server sends the classifier information corresponding to the service to the gateway through an authorization process. Before receiving the classifier information delivered by the server, the gateway first configures the corresponding relationship between the service type and the interface information of the gateway, and the service type includes VoIP service, Game service or Internet service, etc.

In step S402, the gateway determines whether the dynamic information existence bit in the classifier information is set. After receiving the classifier information, the gateway will judge whether the dynamic information existence bit in the classifier information is set.

Step S403, if the bit is set, the gateway dynamically updates the classifier information according to the presence bit of the dynamic information. After judging that the dynamic information existence bit in the classifier information is set, the gateway will update the parameters identified by the dynamic information existence bit when the service flow is established. When using the classifier to classify, these dynamically updated parameters can be used to distinguish different services. Stream, and then realize the classification function. In the embodiment of the present invention, dynamic parameters related to interface information such as VPN ID, VLAN ID, and GRE KEY are added to the classifier information. The meanings of these parameters are shown in Table 2. In Table 2, Dynamic Information Exist Flag, VPN ID, VLAN ID, and GRE KEY are newly added classifier parameters in the embodiment of the present invention. If the VPN ID bit in the classifier Dynamic Information Exist Flag issued by the server, namely Bit#8 bit, the gateway will dynamically update the VPN ID parameter when the service flow is established, and apply this parameter when classifying the packet.

After updating the corresponding parameters according to the presence of dynamic information, the gateway checks the uniqueness of each type of service classifier, and sends the classifier with the updated corresponding parameters to the entity that performs the classification function. After the downstream data arrives at the gateway, the gateway completes the data classification function by matching valid parameters in the downstream classifier, including the original parameters of the classifier and the newly added parameters of the embodiment of the present invention. Then the classified data is sent to the client.

As shown in FIG. 5 , it is a schematic diagram of Embodiment 1 of the method for dynamically updating classifier information in the present invention. In FIG. 5 , - indicates Internet service data, ... indicates VoIP service data, and -·- indicates other service data.

In actual networking, various types of services are often distinguished through different channels on the R3 interface. As shown in Figure 5, a VoIP service tunnel is established between the ASN-GW and a gateway of the VoIP network. This tunnel can be identified by a VPN , can also be used for VLAN identification, and other services can also establish other service tunnels between the gateway and the service gateway. Through the interface information, VPN ID or VLAN ID of these tunnels on the ASN-GW, the classifier can distinguish different services.

In this networking mode, the corresponding relationship between service types and VPNs can be pre-configured on the ASN-GW. For example, the VRF (VPN Routing and Forwarding, VPN routing/forwarding) corresponding to the VoIP service is called voipservice (VPN ID= 3), the name of the VRF instance corresponding to the Game service is gameservice (VPN ID=5). MS1 and MS2 are VPN users who have signed Internet, Game, and VoIP services, so the service classifiers that can be set on the AAA Server are:

Internet: No classifier set

Game: {Dynamic information exists, VPN ID bit is set}

VoIP: {Dynamic information exists, VPN ID bit is set}

After ASN-GW receives the service classifier whose dynamic information existence position is set, it queries the local configuration to obtain the corresponding VPN ID, then updates the VPN ID to the classifier information, and then checks whether the classifier of each type of service is unique and passes the check Then send it to the entity that performs the classification function.

When a downlink message arrives at the ASN-GW, according to the destination IP of the message, that is, the user IP, the ASN-GW can locate the above two classifiers, and then match each classifier one by one according to the priority in the classifier , in the embodiment of the present invention, since the VPN ID dynamic information existence bit of the classifier information is set, the ASN-GW uses the VPN ID information of the message to match the classifier. If it is a VoIP service, it matches the VPN ID=3 The classifier succeeds, so the ASN-GW uses the DataPath corresponding to the classifier to forward the packet to the BS.

In the above-mentioned method for dynamically updating the classifier information, in the WiMAX system, the AAA Server sets the VPN ID position in the classifier information existence bit, and after the ASN-GW receives the classifier information, updates the VPNID to the classifier information, thereby Realize the dynamic update of classifier information, and also make the existing classification process by matching classifiers compatible with the scene of classification relying on interface information.

Embodiment 2 of the method for dynamically updating classifier information of the present invention is to apply the method for dynamically updating classifier information proposed by the embodiment of the present invention in a 3GPP (3rd Generation Partnership Project) system. In the 3GPP system, the classifier information parameters are shown in Table 3.

table 3

8 7 6 5 4 3 2 1

The dynamic information presence bit in Table 3 is the newly added 8-bit dynamic information presence bit, and the type identifier of the classifier information parameter can be set as follows:

Bits

8 7 6 5 4 3 2 1

0 0 0 1 0 0 0 0 IPv4 remote address type

0 0 1 0 0 0 0 0 IPv6 remote address type

0 0 1 1 0 0 0 0 Protocol identifier/Next header type

0 1 0 0 0 0 0 0 Single local port type

0 1 0 0 0 0 0 1 Local port range type

0 1 0 1 0 0 0 0 Single remote port type

0 1 0 1 0 0 0 1 Remote port range type

0 1 1 0 0 0 0 0 Security parameter index type

0 1 1 1 0 0 0 0 Type ofservice/Traffic class type

1 0 0 0 0 0 0 0 Flow label type

1 0 0 0 0 0 0 1 VPN ID

1 0 0 0 0 0 1 0 VLAN ID

1 0 0 0 0 0 1 1 GRE KEY

Other values are reserved and can be set to 0, wherein VPN ID, VLAN ID, and GRE KEY are newly added classifier parameters in the embodiment of the present invention, if the VPN ID bit in the classifier dynamic information sent by the server exists, that is, Bit 8 is set, the gateway will dynamically update the VPN ID parameter when the service flow is established, and apply this parameter when classifying the packet.

The embodiment of the present invention provides a method for dynamically updating classifier information. Through the embodiment of the present invention, a dynamic information presence bit is added to the classifier information, and the gateway updates the corresponding parameters according to the dynamic information presence bit, solving the problem of The problem that the existing classifier cannot be updated dynamically, and through the new classifier parameters, the existing classification process by matching classifiers can be compatible with the scene of classification relying on interface information.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software plus a necessary general-purpose hardware platform, and of course also by hardware, but in many cases the former is a better implementation Way. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions to make a A computer device (which may be a personal computer, a server, or a network device, etc.) executes the methods described in various embodiments of the present invention.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (15)

1. A method for dynamically updating classifier information, comprising the following steps: Correspondence between gateway configuration service types and gateway interface information; The gateway receives the classifier information corresponding to the service issued by the server, and a dynamic parameter related to the interface information is added to the classifier information; The gateway judges whether the dynamic information presence bit in the classifier information is set; If set, the gateway dynamically updates the classifier information according to the dynamic information existence bit. 2. The method for dynamically updating classifier information as claimed in claim 1, is characterized in that, after said gateway dynamically updates said classifier information according to said dynamic information existence bit, further comprising the following steps: The gateway judges whether the classifier corresponding to the service type is unique; If unique, the classifier is sent to the entity that performs the classification function. 3. The method for dynamically updating classifier information according to claim 2, characterized in that, after sending the classifier to the entity performing the classification function, the gateway further comprises the following step: the gateway matches the classifier Classify downstream data. 4. The method for dynamically updating classifier information according to claim 1, characterized in that, before the gateway receives the classifier information sent by the server, it further comprises the following step: the server sets the classifier information. 5. The method for dynamically updating classifier information as claimed in claim 4, wherein said server setting said classifier information specifically comprises: The server judges whether to dynamically update the classifier information; If the classifier information needs to be dynamically updated, the server sets the dynamic information existence position. 6. The method for dynamically updating classifier information as described in any one of claims 1-5, wherein said classifier information includes: virtual private network identification VPN ID, virtual local area network identification VLANID and/or general routing encapsulation Key GRE KEY. 7. A system for dynamically updating classifier information, comprising: The server is configured to set classifier information, and issue the classifier information; A gateway, connected to the server, for receiving the classifier information corresponding to the service delivered by the server, adding dynamic parameters related to interface information to the classifier information, and judging the dynamic parameters in the classifier information Whether the information existence bit is set, if set, then dynamically update the classifier information according to the dynamic information existence bit; The gateway also includes a relationship configuration module, configured to configure the correspondence between service types and the gateway interface information. 8. The system for dynamically updating classifier information as claimed in claim 7, wherein said server comprises: an information setting module, configured to set the classifier information; An information delivery module, connected to the information setting module, for delivering the classifier information set by the information setting module to the gateway. 9. The system for dynamically updating classifier information as claimed in claim 8, wherein said server also includes: an update judgment module, connected to said information setting module, for judging whether it is necessary to dynamically update said classifier information , if the classifier information needs to be dynamically updated, the update judging module notifies the information setting module to set the dynamic information existence bit in the classifier information. 10. The system for dynamically updating classifier information as claimed in claim 7, wherein said gateway comprises: An information receiving module, configured to receive the classifier information issued by the server; An information judging module, connected to the information receiving module, for judging whether the dynamic information presence bit in the classifier information received by the information receiving module is set; An information updating module, connected to the information judging module, configured to dynamically update the classifier information after the information judging module judges that the dynamic information existence bit is set. 11. The system of dynamically updating classifier information as claimed in claim 7, is characterized in that, described gateway also comprises: A classifier judging module, connected to the information updating module, for judging whether the classifier corresponding to the service type is unique after the information updating module has updated the classifier information; A classifier issuing module, connected to the classifier judging module, for sending the classifier after the classifier judging module judges that the classifier corresponding to the service type is unique. 12. The system for dynamically updating classifier information as claimed in claim 11, wherein the gateway further comprises: a classification module, connected to the classifier sending module, for matching the classifier sending module The delivered classifier classifies the downlink data. 13. A gateway, characterized in that, comprising: A relationship configuration module, configured to configure the corresponding relationship between the service type and the gateway interface information; An information receiving module, configured to receive the classifier information corresponding to the service issued by the server according to the correspondence between the service type and the gateway interface information; An information judging module, connected to the information receiving module, for judging whether the dynamic information presence bit in the classifier information received by the information receiving module is set; An information updating module, connected to the information judging module, configured to dynamically update the classifier information after the information judging module judges that the dynamic information existence bit is set. 14. The gateway according to claim 13, further comprising: A classifier judging module, connected to the information updating module, for judging whether the classifier corresponding to the service type is unique after the information updating module has updated the classifier information; A classifier sending module, connected to the classifier judging module, is configured to send the classifier after the classifier judging module judges that the classifier corresponding to the service type is unique. 15. The gateway according to claim 14, further comprising: a classification module, connected to the classifier sending module, for performing classification on downlink data by matching the classifier sent by the classifier sending module Classification.

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