CN105812257A - Business chain router management system and use method thereof - Google Patents

Abstract

The present invention discloses a service link routing management system and its use method. In the above system, the service link routing management function 10 is used to configure a service forwarding table and a service link path table for a service forwarder, wherein the service link The path table includes the service list that the service forwarder passes through to process the received user data packet, and the service forwarding table includes the service forwarder sends the service data packet to the service provider when determining each service to be processed according to the service link path table. The forwarding path of the business function of the business to be processed; the business forwarder 20 is used to obtain each business to be processed according to the business chain path table, and send the user data packet to the business function that provides the business to be processed according to the business forwarding table ; The service function 30 is used to perform service processing on the user data packet. According to the technical solution provided by the invention, the system can automatically generate a service forwarding table to realize automatic management of service routing.

Description

Service chain routing management system and method of use thereof

technical field

The present invention relates to the field of communications, in particular to a service link routing management system and a method for using the same.

Background technique

In the operator's existing network, service servers (such as network address translation (NAT), deep packet inspection (DPI), codec, compression) are connected in series on the transmission path, which makes the service chain and the transmission network tightly coupled. Modifying the service chain often requires modifying the topology of the transmission network. This complex configuration makes adding or modifying service chains particularly complicated. Moreover, due to configuration restrictions, operators in the current network usually only configure one or a few service chains, and service data can flow through all service servers in the configured service chain in a fixed order, even if the service data does not require It is processed by the service server, thereby increasing the load of the service server and also increasing the data transmission delay. In this architecture, the combination of service chains is inflexible, and the configuration of adding or modifying service servers is complicated, which is not conducive to the development of innovative services.

The Internet Engineering Task Force (IETF) Service Function Chain (SFC) co-working group is discussing how to support service chain more flexibly. FIG. 1 is a schematic diagram of service chain architecture components defined by the IETF in the related art. As shown in Figure 1, the most basic goal of SFC is to decouple the service chain from the network topology. In the architecture defined by the IETF, a service classifier (ServiceClassifier) can classify service flows and select service chain paths, and perform service chain encapsulation on service data packets. The encapsulated service data packets are processed by multiple service servers in the service chain in sequence. Service chain encapsulation (SFC encapsulation for short) is not used for data transmission, and data transmission can rely on the outer packet header, which can decouple the service chain from the network topology. Adding a new service server only needs to increase the link between the service server and the service forwarder, thereby decoupling from other service servers (it is a star architecture), and also decoupling from the transmission network.

When the service function processes the user data packet, it may need some user-related information, such as user ID, user access network status, user level and authority, and other information. These information are called user service configuration parameters. The service function can decide how to process the user data packet according to the user service configuration parameters. For example: when the user's access network is congested, the service function can decide whether to use a specific compression technology to compress user data packets based on this information.

In related technologies, the service link route can be sent to the service forwarder through manual configuration, but this method is not flexible enough and cannot realize network automation.

Contents of the invention

The embodiment of the present invention provides a service link routing management system and its use method, to at least solve the lack of flexibility and the inability to realize network The problem with automation.

According to one aspect of the present invention, a service link routing management system is provided.

The service link routing management system according to the embodiment of the present invention includes: a service link routing management function, which is used to configure a service forwarding table and a service link path table for the service forwarder, wherein the service link path table includes The service list that the received user data packet passes through, and the service forwarding table includes the forwarding path that the service forwarder sends the service data packet to the service function that provides the service to be processed when determining each service to be processed according to the service chain path table ; The service forwarder is used to obtain each service to be processed according to the service chain path table, and sends the user data packet to the service function that provides the service to be processed according to the service forwarding table; the service function is used to process the user data packet Do business processing.

Preferably, the above system further includes: a gateway forwarding plane, configured to send user data packets to the service forwarder, wherein the user data packets are classified according to user service chain classification rules, and a service chain header is added to the user data packets, and the service The chain header includes the business chain identification.

Preferably, the above system further includes: a gateway controller, configured to configure the forwarding plane of the gateway.

Preferably, the above system further includes: a user service chain policy management function for managing policies corresponding to the user service chain.

Preferably, the above system further includes: a software-defined network SDN controller, which is used to provide a southbound interface for the gateway controller, the user service chain policy management function and the service link routing management function to control the gateway forwarding plane and the service forwarder.

According to another aspect of the present invention, a method for using a service link routing management system is provided.

The method for using the service link management system according to the embodiment of the present invention includes: the service link management function receives a first information set from the service function, wherein the first information set includes at least one of the following: the capability of the service function Information, load information of the service function, information of the service forwarder connected by the service function; and/or, the service link management function receives the second information set from the service forwarder, wherein the second information set includes at least one of the following : Neighbor information, self information, neighbor information includes: information of other service forwarders directly connected to the service forwarder; the service link routing management function configures a service forwarding table for the service forwarder according to the first information set and/or the second information set .

Preferably, the service forwarder information of the service function connection is one of the following: the layer 2 link information of the connected service forwarder, the Internet Protocol IP address of the connected service forwarder, the logical name of the connected service forwarder .

Preferably, the capability information includes: the type of service supported by the service function, and the capacity of the service function.

Preferably, the information of other service forwarders directly connected to the service forwarder is one of the following: layer 2 link information of other service forwarders, layer 3 IP address information of other service forwarders, logical names of other service forwarders.

Preferably, the service link routing management function configures the service forwarding table for the service forwarder according to the first information set and/or the second information set includes: the service link routing management function according to the first information set and/or the second information set is The service forwarder calculates the service forwarding table; the service link routing management function sends the service forwarding table and the service link path table to the service forwarder via the software-defined network SDN controller, wherein the service link path table is a pre-configured table.

Preferably, after the service link routing management function configures the service forwarding table and the service link path table for the service forwarder according to the first information set and/or the second information set, it also includes: the service link routing management function receives the service function report The load change event, wherein, the load change event is triggered when the load of the service function changes beyond the preset load threshold set by the service link management function; the service link management function re-according to the load change event The service forwarder is configured with a service forwarding table.

According to yet another aspect of the present invention, a method for using a service link routing management system is provided.

The method for using the service link routing management system according to the embodiment of the present invention includes: the service forwarder receives the service forwarding table and the service link path table from the service link routing management function, wherein the service link path table includes the service forwarder as The service list that the received user data packet passes through is processed. The service forwarding table includes the service forwarder sending the service data packet to the service function that provides the service to be processed when determining each service to be processed according to the service chain path table. Forwarding path: the service forwarder uses the service forwarding table and the service chain path table to route the obtained user data packets.

Preferably, the service forwarder adopts the service forwarding table and the service chain path table to route the user data packet, including: the service forwarder sequentially obtains successively passed multiple data packets from the service chain path table according to the service chain identifier and the service pointer in the user data packet. Each business name, and query the service forwarding table according to each business name to obtain the path information of the business function that provides the service; sequentially use the path information corresponding to each business name to forward the user data packet.

Through the embodiment of the present invention, the service link routing management function is used to configure the service forwarding table and the service link path table for the service forwarder, wherein the service link path table includes the service forwarder to process the received user data packet. The service list, the service forwarding table includes the forwarding path that the service forwarder sends the service data packet to the service function that provides the service to be processed when determining each service to be processed according to the service chain path table; the service forwarder is used for Obtain each pending service according to the service chain path table, and send the user data packet to the service function that provides the service to be processed according to the service forwarding table; the service function is used to perform business processing on the user data packet, and solves related problems The manual configuration method used in the technology to send the service link route to the service forwarder lacks flexibility and cannot realize network automation, and then the system can automatically generate a service forwarding table to realize the automatic management of service routing.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present invention and constitute a part of the application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations to the present invention. In the attached picture:

FIG. 1 is a schematic diagram of service chain architecture components defined by the IETF in the related art;

Fig. 2 is a structural block diagram of a service link routing management system according to an embodiment of the present invention;

Fig. 3 is a schematic structural diagram of a service link routing management system according to a preferred embodiment of the present invention;

4 is a schematic diagram of a network topology of a gateway forwarding plane, a service forwarder, and a service function according to a preferred embodiment of the present invention;

Fig. 5 is a schematic diagram of data packets during communication between the gateway forwarding plane and the service forwarder according to a preferred embodiment of the present invention;

Fig. 6 is a flowchart of a method for using a service link routing management system according to an embodiment of the present invention;

Fig. 7 is a flow chart of another method for using a service link routing management system according to an embodiment of the present invention;

Fig. 8 is a flow chart of registering a service forwarder to a service link routing management module according to a preferred embodiment of the present invention;

Fig. 9 is a flow chart of information interaction between the service forwarder and the service link routing management module during logout according to a preferred embodiment of the present invention;

Fig. 10 is a flow chart of information interaction between a service function and a service link routing management module according to a preferred embodiment of the present invention.

detailed description

Hereinafter, the present invention will be described in detail with reference to the drawings and examples. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

Fig. 2 is a structural block diagram of a service link routing management system according to an embodiment of the present invention. As shown in Figure 2, the service link routing management system may include: a service link routing management function 10 configured to configure a service forwarding table and a service link path table for the service forwarder, wherein the service link path table includes a service forwarder In order to process the service list that the received user data packet passes through, the service forwarding table includes the service function that the service forwarder sends the service data packet to the service that provides the service to be processed when determining each service to be processed according to the service chain path table the forwarding path; the service forwarder 20 is used to obtain each service to be processed according to the service chain path table, and sends the user data packet to the service function that provides the service to be processed according to the service forwarding table; the service function 30 uses It is used for business processing on user data packets.

The manual configuration method used in the related art to route the service link to the service forwarder lacks flexibility and cannot realize network automation. With the system shown in Figure 2, service functions and service forwarders can automatically report neighbor information and their own capability information, so that the system can automatically generate service forwarding tables to realize automatic management of service routes.

As a preferred embodiment of the present invention, FIG. 3 is a schematic structural diagram of a service link routing management system according to a preferred embodiment of the present invention. As shown in FIG. 3 , the gateway controller 40 is configured to configure the gateway forwarding plane, for example, sending the user plane tunnel information and user service chain classification rules to the gateway forwarding plane. The user service chain policy management function 50 is used to manage policies related to the user service chain, for example: configuring user service chain classification rules for the service classifier, configuring user service configuration parameters for service functions, and so on. The service chain policy management function manages the service chain policies related to users. The service link routing management function 10 is used to manage service functions, the connection relationship between service functions and service forwarders, and be responsible for load sharing among multiple instances of service functions, and configure service forwarding tables and service chain path tables for service forwarders. The gateway forwarding plane 60 is responsible for forwarding user data packets, classifying user data packets according to user service chain classification rules, and attaching service chain headers to user data packets, which may include but not limited to: service chain identifiers. The service forwarder 20 is responsible for querying the service chain path table according to the service chain identifier in the user data packet, the current position of the user data packet in the service chain, etc., to obtain the next pending service of the user data packet, and query The service forwarding table obtains the forwarding path of the corresponding service function, and then sends the data packet to the service function. The service function 30 is responsible for performing service-related processing on user data packets, such as codec, NAT, parental control, and the like. The user service configuration parameters of the user may be used during the processing of the user data packet. The SDN controller is responsible for centralized and unified control of the underlying forwarding equipment, and at the same time provides an interface for network capability calls to upper-layer services. The gateway controller, the user service chain policy management function, and the service link routing management function are applications on the SDN controller 70. These applications can control the lower-layer forwarding equipment through the southbound interface provided by the SDN, including: gateway forwarding plane and service forwarding device.

In the above architecture, service classification can be performed on the forwarding plane of the gateway. Therefore, the user service chain policy management function can send the service classification rules to the forwarding plane of the gateway through the gateway controller. The forwarding plane of the gateway classifies the user data packets according to the service classification rules, and adds the corresponding service chain identifier and other parameters, such as user service configuration index, etc. In a specific implementation process, the user service chain policy management function can be realized by enhancing the Policy and Charging Rule Function (Policy and Charging Rule Function, PCRF for short) in the 3rd Generation Partnership Project (3GPP) network. The interface between the user service chain policy management function and the gateway controller can be realized by extending the Gx interface, adding content related to service classification rules on the original Gx interface. An SDN controller interface may be used between the gateway controller and the gateway forwarding plane.

The foregoing service classification rules may include, but are not limited to: user service chain flow description, service chain identifier, and other options, such as user service configuration index. The forwarding plane of the gateway can match the received user data packet with the user service chain flow description in the service classification rules; if the match is successful, it will add information such as the service chain identifier, service pointer, and other optional items in the user data packet, where The service chain identifier is used to identify a logical service chain that has nothing to do with the user, and the service pointer is the position of the user data packet in the current service chain, that is, it points to the current service.

In order to support the transmission of user service configuration parameters through the control channel, the user service chain policy management function interfaces with the service function, so as to send the user service configuration parameters to the service function through the interface. The interface between the user service chain policy management function and the service function can be implemented by extending the Sd interface or extending the Rx interface.

The user service configuration parameters sent by the user service chain policy management function to the service function may include but not limited to the following parameters:

(1) Service configuration parameters: the parameters required by the service function to process the service data packets of the user service chain, for example: user identification, wireless congestion status, and user level.

(2) Service chain identification: used to identify the logical service chain.

Optionally, the user service configuration parameter index is used for quickly querying service configuration parameters, and the corresponding user service configuration parameters can be quickly found through the user service configuration parameter index, and can be modified or deleted.

Optionally, the user service configuration parameters may also include: user service chain flow description, the user service chain flow description is used to describe the service data flow characteristics of the service chain of the user, which may at least include: the user's Internet protocol ( IP) address. Adding the user service chain flow description in the user service configuration parameters can effectively prevent the service classifier from appending the service configuration parameter index in the user data packet. When the packet length of the user data packet is short, the packet transmission efficiency will be reduced by adding a new field; and when the user data packet is long, the packet fragmentation will be caused by adding a new field. Therefore, in order to add as few fields as possible to the user data packet, the user service chain flow description is added to the user service configuration parameters, and the service function will match the received user data packet with the user service chain flow description. , the service configuration parameter corresponding to the user service chain flow description above is the service configuration parameter corresponding to the user data packet, and the service function will use the user service configuration parameter to process the user data packet. If the user's service data packet matches multiple user service chain flow descriptions, select the corresponding service configuration data according to the longest matching principle, and use the service configuration parameters to process the user's service data packet.

As another preferred embodiment of the present invention, FIG. 4 is a schematic diagram of a network topology of a gateway forwarding plane, a service forwarder, and a service function according to a preferred embodiment of the present invention. As shown in FIG. 4 , the gateway forwarding plane is configured with a default service forwarder, and the gateway forwarding plane sends the classified user data packets with added service chain headers to the default service forwarder. The forwarding plane of the gateway and the service forwarder can be directly connected through a layer 2 link or connected through an IP tunnel. Configure the forwarding path of the default service forwarder on the forwarding plane of the gateway: when the two are connected through a layer-2 link, the forwarding path is a layer-2 tunnel; when the two are connected through a layer-3 link, the forwarding path is a layer-3 tunnel.

As yet another preferred embodiment of the present invention, FIG. 5 is a schematic diagram of data packets during communication between the forwarding plane of the gateway and the service forwarder according to the preferred embodiment of the present invention. As shown in Figure 5, a service chain header is added before the original user data packet (or added in the user data packet), and the service chain header may include information such as service chain identifier, service pointer, and other optional items. The forwarding plane of the gateway encapsulates the above-mentioned user data packet with the added service chain header into a layer-2 tunnel or a layer-3 tunnel according to the forwarding path of the configured service forwarder, and the destination address of the layer-2/layer-3 tunnel (layer-2 or layer-3 ) is the address of the service forwarder.

As shown in FIG. 4 above, a service forwarder can be connected to one or more service functions, and these service functions can support the same or different service types. There may be one or more service forwarders in the network, and the service forwarders may be directly connected through a layer-2 link or connected through a layer-3 tunnel. When a specific service function is unreachable through the service forwarder configured on the forwarding plane of the gateway, the user data packet can be forwarded to the service forwarder connected to the service function through the layer 2 or layer 3 link between the service forwarders, and the The service forwarder sends the user data packets to the service functions. In the above Figure 4, if the user data packet sent from the gateway forwarding plane 1 needs to be processed by the service function 4, the service forwarder 1 needs to send the user data packet to the service forwarder 3 through the service forwarder 2, and then the service Transponder 3 sends user data packets to service function 4 .

In a preferred embodiment, two tables are stored in the service forwarder: a service chain routing table and a service forwarding table.

Table 1 is the service chain route table. As shown in Table 1:

Table 1

The service chain path table is a relatively static table, which stores the ordered service combinations in the logical service chain, that is, the ordered list of a series of services that all data packets belonging to the logical service chain need to pass through. The service forwarder searches the list of services that the user data packet passes through according to the service chain identifier in the user data packet, and searches for the name of the next service to be processed according to the service pointer in the user data packet. Then, the service forwarder searches the service forwarding table according to the service name, so as to obtain the forwarding path for sending the data packet to the service function providing the service.

Table 2 is a service forwarding table. As shown in table 2:

Table 2

The service forwarding table stores the forwarding path of a specific service, that is, the information of the service function corresponding to the specific service, that is, the information of the layer-2 or layer-3 tunnel from the service forwarder to the service function. When one service corresponds to multiple service function instances, the routing table also stores the load factor of each service function, and the load factor indicates the packet processing capability of the service function instance. The service forwarder determines the proportion of tasks allocated to the service function according to the load factor. For example: in the above FIG. 4 , service 1 is served by two instances of service function 11 and service function 12 , both of which are connected to service forwarder 1 . The service forwarding path information of service 1 in the service path table in service forwarder 1 is as follows:

Service 1, next hop: service function 11, load factor 0.4;

Service 1, next hop: service function 12, load factor 0.6;

When the service forwarder 1 receives the user data packet that needs to be processed by the service 1, it finds the service forwarding path information of the above service 1, and the service forwarder can select the service function 11 to serve the user data packet according to the load factor, and the service forwarder will The user data packet is forwarded to the service function 11 through a layer-2 or layer-3 tunnel.

When a specific service function needs to be forwarded through other service forwarders, the forwarding path information of the service stored in the service forwarding table is the information of the next-hop service forwarder. For example: in the above Figure 4, the forwarding path information about the service 4 provided by the service function 4 stored in the service forwarder 1 is:

Service 4, next hop: service forwarder 2;

The forwarding path information of the service 4 stored in the service forwarder 2 is:

Service 4, next hop: service forwarder 3;

The forwarding path information of the service 4 stored in the service forwarder 3 is:

Business 4, next hop: business function 4;

When the user data packet sent from gateway forwarding plane 1 needs to be processed by service 4, the service forwarder encapsulates the user data packet in the second or third layer leading to service forwarder 2 according to the next hop information of service 4 Sent to the service forwarder 2 in the tunnel; when the data packet reaches the service forwarder 2, the service forwarder 2 searches for the next hop information of the service 4, and encapsulates the user data packet on the second or third layer leading to the service forwarder 3 The service function 4 is directly connected to the service forwarder 3, and the service forwarder 3 encapsulates the data packet in the tunnel leading to the service function 4 and sends it to the service function 4.

Fig. 6 is a flowchart of a method for using the service link routing management system according to an embodiment of the present invention. As shown in Figure 6, the method may include the following processing steps:

Step S602: The service link management function receives the first information set from the service function, wherein the first information set includes at least one of the following: capability information of the service function, load information of the service function, and service forwarding of the service function connection and/or, the service link management function receives the second information set from the service forwarder, wherein the second information set includes at least one of the following: neighbor information, self information, neighbor information includes: related to service forwarding Information about other service forwarders directly connected to the forwarder;

Step S604: The service link routing management function configures a service forwarding table for the service forwarder according to the first information set and/or the second information set.

Preferably, the service forwarder information of the above service function connection can be one of the following:

(1) Layer 2 link information of the connected service forwarder;

(2) IP address of the connected service forwarder;

(3) Logical name of the connected service forwarder.

Preferably, the above capability information may include: the type of service supported by the service function, and the capacity of the service function.

Preferably, the above-mentioned information on other service forwarders directly connected to the service forwarder may be one of the following:

(1) Layer 2 link information of other service transponders;

(2) Layer 3 IP address information of other service forwarders;

(3) Logical names of other service forwarders.

Preferably, in step S604, the service link routing management function configuring the service forwarding table for the service forwarder according to the first information set and/or the second information set may include the following operations:

Step S1: The service link routing management function calculates a service forwarding table for the service forwarder according to the first information set and/or the second information set;

Step S2: The service link routing management function sends the service forwarding table and the service link path table to the service forwarder via the SDN controller, wherein the service link path table is a pre-configured table.

Preferably, in step S604, after the service link routing management function configures the service forwarding table and the service link path table for the service forwarder according to the first information set and/or the second information set, the following steps may also be included:

Step S3: The service link management function receives the load change event reported by the service function, wherein the load change event is triggered when the load of the service function changes beyond the preset load threshold set by the service link management function ;

Step S4: The service link routing management function reconfigures the service forwarding table for the service forwarder according to the load change event.

Fig. 7 is a flow chart of another method for using the service link routing management system according to an embodiment of the present invention. As shown in Figure 7, the method may include the following processing steps:

Step S702: The service forwarder receives the service forwarding table and the service chain path table from the service link routing management function, wherein the service chain path table includes the service list that the service forwarder passes through to process the received user data packet, and the service The forwarding table includes that the service forwarder sends the service data packet to the forwarding path that provides the service function of the service to be processed when determining each service to be processed according to the service chain path table;

Step S704: the service forwarder uses the service forwarding table and the service link path table to route the obtained user data packets.

Preferably, in step S704, the routing of the user data packet by the service forwarder using the service forwarding table and the service chain path table may include the following operations:

Step S5: The service forwarder obtains successively passed multiple service names from the service chain path table according to the service chain identifier and service pointer in the user data packet, and queries the service forwarding table according to each service name to obtain the service function for providing the service path information;

Step S6: using the path information corresponding to each service name to forward the user data packet in sequence.

Fig. 8 is a flowchart of a service forwarder registering with a service link routing management module according to a preferred embodiment of the present invention. As shown in Figure 8, after the service forwarder is powered on, it registers with the service link routing management module, which may include the following processing steps:

Step S802: The service forwarder sends a registration request message to the service link routing management module, wherein the registration request message carries the identity information of the service forwarder.

Step S804: Two-way identity authentication is performed between the service forwarder and the service link routing management module.

Step S806: The service forwarder sends neighbor information to the service link routing management module, where the neighbor information may include but not limited to: information about the service function connected to the service forwarder, other service forwarders connected to the service forwarder device information.

Step S808: The service link routing management module saves the neighbor information received from the service forwarder, and uses the above neighbor information, the neighbor information received from other service forwarders, and the service forwarder information received from the service function and the service function The information recalculates the service forwarding table.

Step S810: the service link routing management module sends the service link routing table and the service forwarding table to the service forwarder. The service forwarder saves the service chain path table and the service forwarding table.

Step S812: After the service route table changes, the service link routing management module sends a message to other service forwarders in the management domain to update the service forwarding table. If the service link routing table also changes, the service link routing management module simultaneously The service chain routing table is also sent to these service forwarders. The service forwarder saves the service forwarding table and the service chain routing table.

Fig. 9 is a flow chart of information interaction between the service forwarder and the service link routing management module during logout according to a preferred embodiment of the present invention. As shown in Figure 9, a service forwarder wishes to delete itself from the service chain due to a specific reason, and the service forwarder sends a deregistration request to the service link routing management module, wherein the deregistration request carries the information of the service forwarder Neighbor service forwarder information. If there is a service function connected to it, the service forwarder can also send the connected service function information to the service link routing management module. The process can include the following processing steps:

Step S902: The service forwarder wants to delete itself from the service chain, and the service forwarder sends a deregistration request to the service link routing management module, wherein the deregistration message carries information of neighboring service forwarders and connected service function information.

Step S904: The service link routing management module recalculates the service forwarding path after receiving the cancellation request message.

Step S906: The service chain route management module sends a new service forwarding path to other service forwarders in the service chain.

Fig. 10 is a flow chart of information interaction between a service function and a service link routing management module according to a preferred embodiment of the present invention. As shown in Figure 10, the service function first sends a registration request message to the service link routing management module. In the registration request message, the service function reports its own capability and load as well as information about the service forwarder connected to the service function. When the service function load changes, the service function will also report this change to the service link routing management module. The service link routing management module can calculate the service forwarding table according to these information. The process can include the following processing steps:

Step S1002: The service function sends a registration request message to the service link routing management module, wherein, in the registration request message, the service function sends its own identity information, capability information, load information and the information of the connected service forwarder to The service link is routed by the management module. The capability information indicates the type of service supported by the service function, that is, the service name; the load information indicates the packet processing capability of the service function instance.

Step S1004: The service link management module authenticates the identity of the service function.

Step S1006: After the authentication is successful, the service link management module saves the identity information, capability information, load information of the service function and the information of the connected service transponder, and the service link management module uses the above information and other service functions to receive The received information and the information received from the service forwarder recalculate the service forwarding table.

Step S1008: The service link routing management module sends a registration confirmation message to the service function, wherein the registration confirmation message carries a load reporting threshold value, which is used to indicate the timing for the service function to report the load change. For example: when the load exceeds the reporting threshold, the reporting service function is busy; and when the load is lower than the reporting threshold, the reporting service function is available.

Step S1010: The service link routing management module sends a message to the service forwarder to update the service forwarding table.

Step S1012: The change of the service function load exceeds the above-mentioned reporting threshold.

Step S1014: When the load of the service function changes and reaches the reporting threshold set by the service link management module, the service function reports a load change event, for example: the service function is busy or the service function is idle (current load value).

Step S1016: The service link routing management module recalculates the service route table after receiving the service function load change event.

Step S1018: The service link routing management module sends a message to the service forwarder to update the service forwarding table.

The neighbor information sent by the service forwarder to the service link routing management module may include but not limited to: the information of the adjacent service forwarder and the information of the connected service function, wherein the information of the connected service forwarder is the adjacent service forwarder The Layer 2 address or IP address of the connected service function, the information of the connected service function is the Layer 2 address or IP address of the connected service function, and the Layer 2 address can be a Media Access Control (MAC) address or other Layer 2 protocol-related addresses.

Taking the above-mentioned Figure 4 as an example, the neighbor information reported by the service forwarder 1 to the service link routing management module is as follows:

(1) service transponder 2, the two-layer address of service transponder 2;

(2) business function 11, the second layer address of business function 11;

(3) Service function 12, the Layer 2 address of the service function 12.

The neighbor information reported by the service forwarder 3 to the service link routing management module is as follows:

(1) service transponder 1, the layer 2 address of service transponder 1;

(2) service transponder 3, the two-layer address of service transponder 2;

(3) Service function 2, the Layer 2 address of service function 2;

(4) Service function 3, the Layer 2 address of service function 3.

The neighbor information reported by the service forwarder 4 to the service link routing management module is as follows:

(1) service transponder 2, the two-layer address of service transponder 2;

(2) Service function 4, the Layer 2 address of service function 4.

The information reported by each service function to the service link routing management module is as follows:

(1) Service function 11, supporting service 1, with a load of a, connected to service transponder 1;

(2) Service function 12, supporting service 1, with a load of b, connected to service transponder 1;

(3) Service function 2, supporting service 2, with a load of x, connected to service transponder 2;

(4) Service function 3, supports service 3, load is x, and is connected with service transponder 2;

(5) Service function 4, supports service 4, load is x, and is connected with service transponder 3.

The service link routing management module forms the service reachable path information shown in Table 3 according to the information received from service forwarders 1, 2, 3 and each service function:

table 3

business 1 Business forwarder 1 load a Service function 11 Layer 2 address MAC encapsulation business 1 Business forwarder 1 load b Service function 12 Layer 2 address MAC encapsulation Business 2 Business forwarder 2 load x Service function 2 layer 2 address MAC encapsulation Business 3 Business forwarder 2 load x Service function 3 Layer 2 address MAC encapsulation Business 4 Business forwarder 3 load x Service function 4 Layer 2 address MAC encapsulation

According to the neighbor service forwarder information received from service forwarders 1, 2, and 3, the service link routing management module can calculate the topology structure of the interconnection of service forwarders.

According to the interconnection topology of the service forwarders and the above reachable path information, the service link management module calculates a service forwarding table for each service forwarder and distributes it to each service forwarder. For example: in the above Figure 4, the service forwarding table calculated by the service link management module for the service forwarder 1 is shown in Table 4:

Table 4

business 1 load a Service function 11 Layer 2 address MAC encapsulation business 1 load b Service function 12 Layer 2 address MAC encapsulation Business 2 load x Layer 2 address of service forwarder 2 MAC encapsulation business 3 load x Layer 2 address of service forwarder 2 MAC encapsulation Business 4 load x Layer 2 address of service forwarder 2 MAC encapsulation

The service forwarding table calculated by the service link management module for the service forwarder 2 is shown in Table 5:

table 5

business 1 load y Layer 2 address of service forwarder 1 MAC encapsulation Business 2 load x Service function 2 layer 2 address MAC encapsulation business 3 load x Service function 3 Layer 2 address MAC encapsulation Business 4 load x Layer 2 address of service forwarder 3 MAC encapsulation

The service forwarding table calculated by the service link management module for the service forwarder 3 is shown in Table 6:

Table 6

business 1 load y Layer 2 address of service forwarder 1 MAC encapsulation Business 2 load x Layer 2 address of service forwarder 2 MAC encapsulation Business 3 load x Layer 2 address of service forwarder 2 MAC encapsulation Business 4 load x Service function 4 Layer 2 address MAC encapsulation

In the service forwarding table sent to service forwarder 2 and service forwarder 3 by the service link routing management module, only one record pointing to service forwarder 1 is included for service 1, and the service link routing management module The load of 12 calculates the load of the service 1 in the service forwarding table sent to the service forwarder 2 and the service forwarder 3 .

When the service forwarder receives the user data packet, it first queries the service chain path table according to the service chain identifier and the service pointer in the user data packet to obtain the next service name to be processed, and then queries the service forwarding table according to the service name to obtain The encapsulation mode and destination address information of the next hop are obtained, and the user data packet can be encapsulated according to the encapsulation mode and then sent to the next hop by using the destination address information.

From the above description, it can be seen that the above-mentioned embodiments achieve the following technical effects (it should be noted that these effects are the effects that some preferred embodiments can achieve): adopting the technical solutions provided by the embodiments of the present invention can make The service function and service forwarder automatically report neighbor information and its own capability information, so that the system can automatically generate a service forwarding table to realize automatic management of service routing.

Obviously, those skilled in the art should understand that each module or each step of the above-mentioned present invention can be realized by a general-purpose computing device, and they can be concentrated on a single computing device, or distributed in a network formed by multiple computing devices Alternatively, they may be implemented in program code executable by a computing device so that they may be stored in a storage device to be executed by a computing device, and in some cases in an order different from that shown here The steps shown or described are carried out, or they are separately fabricated into individual integrated circuit modules, or multiple modules or steps among them are fabricated into a single integrated circuit module for implementation. As such, the present invention is not limited to any specific combination of hardware and software.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. 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 (13)

1. a business chain route management system, it is characterised in that including:

Business chain routing management function, for for business transponder configuration service forward table and business chain routing table, wherein, it is process the service lists that the user data package that receives is passed that described business chain routing table includes described business transponder, and described business forward table includes described business transponder and described business data packet sends when determining each pending business according to described business chain routing table the forward-path of the business function to the business providing this pending；

Described business transponder, for obtaining each pending business according to described business chain routing table, and sends described user data package to the business function providing this pending business according to described business forward table；

Described business function, for carrying out Business Processing to described user data package.

2. system according to claim 1, it is characterised in that described system also includes:

Gateway forwards face, for sending described user data package to described business transponder, wherein, according to customer service chain classifying rules, described user data package is classified, and in described user data package, adding business chain head, described business chain head includes business chain mark.

3. system according to claim 2, it is characterised in that described system also includes:

Gateway controller, for configuring described gateway forwards face.

4. system according to claim 3, it is characterised in that described system also includes:

Customer service chain policy management capability, for managing the strategy corresponding with customer service chain.

5. system according to claim 4, it is characterised in that described system also includes:

Software defined network SDN controller, for providing southbound interface that described gateway forwards face and business transponder are controlled for described gateway controller, described customer service chain policy management capability and described business chain routing management function.

6. the using method of the business chain route management system as according to any one of claim 1 to 5, it is characterised in that including:

Business chain routing management function receives the first information set coming from business function, wherein, described first information set includes at least one of: the business transponder information that the ability information of described business function, the information on load of described business function, described business function connect；And/or, described business chain routing management function receives the second information aggregate coming from business transponder, wherein, described second information aggregate includes at least one of: neighbor information, self information, and described neighbor information includes: other business transponder information being joined directly together with described business transponder；

Described business chain routing management function is described business transponder configuration service forward table according to described first information set and/or described second information aggregate.

7. method according to claim 6, it is characterized in that, the business transponder information that described business function connects is one below: two layers of link information of the business transponder connected, the internet protocol address of the business transponder connected, the logical name of business transponder that connects.

8. method according to claim 6, it is characterised in that described ability information includes: described business function support type of service, described business function capacity.

9. method according to claim 6, it is characterized in that, other business transponder information being joined directly together with described business transponder are one below: two layers of link information of other business transponders, the three layers of IP address information of other business transponders described, other business transponders described logical name.

10. method according to claim 6, it is characterised in that described business chain routing management function is that the described business forward table of described business transponder configuration includes according to described first information set and/or described second information aggregate:

Described business chain routing management function is that described business transponder calculates described business forward table according to described first information set and/or described second information aggregate；

Described business forward table and business chain routing table are sent to described business transponder by described business chain routing management function via software defined network SDN controller, and wherein, described business chain routing table is the form being pre-configured with.

11. the method according to any one of claim 6 to 10, it is characterized in that, after described business chain routing management function is the described business transponder described business forward table of configuration and described business chain routing table according to described first information set and/or described second information aggregate, also include:

Described business chain routing management function receives the load variations event that described business function reports, wherein, described load variations event is to trigger when the load of described business function changes and exceedes default load threshold value that described business chain routing management function sets；

Described business chain routing management function is that described business transponder configures described business forward table according to described load variations event again.

12. the using method of the business chain route management system as according to any one of claim 1 to 5, it is characterised in that including:

Business transponder receives the business forward table and the business chain routing table that come from business chain routing management function, wherein, it is process the service lists that the user data package that receives is passed that described business chain routing table includes described business transponder, and described business forward table includes described business transponder and described business data packet sends when determining each pending business according to described business chain routing table the forward-path of the business function to the business providing this pending；

Described business transponder adopts described business forward table and described business chain routing table that the user data package got is route.

13. method according to claim 12, it is characterised in that described business transponder adopts described business forward table and described business chain routing table described user data package to be carried out route and includes:

Described business transponder identifies according to the business chain in described user data package and business pointer obtain successively from described business chain routing table continuously across multiple business names, and inquire about described business forward table according to each business name and obtain the routing information of business function that service is provided；

Utilize the routing information corresponding with each business name that described user data package is forwarded successively.