WO2007003098A1

WO2007003098A1 - A method for classifying the multiple protocol label switching traffic stream

Info

Publication number: WO2007003098A1
Application number: PCT/CN2006/001367
Authority: WO
Inventors: Liubo Mei
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2005-06-30
Filing date: 2006-06-16
Publication date: 2007-01-11
Also published as: CN1889582B; CN1889582A

Abstract

A method for classifying the Multiple Protocol Label Switching traffic stream includes: both communicating parties in the Worldwide interoperability for Microwave Access (WiMAX) network set the mapping relation of the Multiple Protocol Label Switching (MPLS) label to the WiMAX Connection Identifier (CID); after classifying the MPLS traffic stream based on the mapping relation, transmit the traffic stream on the logical connection corresponding to the category in the WiMAX network. Using the scheme of the invention, the mapping from the MPLS traffic stream which identifier is the MPLS label to the WiMAX wireless access network data stream which identifier is the connection identifier (CID) is realized in the WiMAX wireless access network. Thereby, the MPLS traffic stream could obtain the corresponding appropriate service in the WiMAX wireless access network.

Description

Method for classifying multi-protocol label switching service flow

Technical field

The present invention relates to the field of communications, and in particular, to a method for classifying a multi-protocol label switching service flow. Background of the invention

Worldwide Interoperability for Microwave Access (WiMAX) is a metropolitan area network wireless broadband access technology with wide coverage and large data bandwidth. In the WiMAX network, the service specific Convergence Sublayer (CS) is identified for the service of the packet. That is, the main functions of the Packet CS are: classifying the traffic of the upper layer protocol service flow, and completing the traffic flow of the high layer protocol to the WiMAX data stream. Mapping.

MPLS (Multi Protocol Label Switching) technology is gradually recognized in the scope of the metropolitan area network due to its superiority in virtual private network VPN service bearer, network scalability, operation and maintenance OAM, traffic engineering, etc. And use.

However, in the current WiMAX network Packet CS, there is no traffic classification rule for MPLS-type packets, and the service flow type in the MPLS network cannot be mapped to the data flow type in the WiMAX network, resulting in MPLS-type packets in WiMAX wireless. The corresponding services are not available in the access network, which affects the combination of WiMAX technology and MPLS technology. Summary of the invention

In view of the above problems in the prior art, the present invention provides a method for classifying MPLS service flows, and classifying MPLS service flows in a WiMAX radio access network. A method for classifying a multi-protocol label switching service flow, characterized in that: the communication parties in the world microwave interoperating WiMAX network set a mapping relationship between the multi-protocol label switching MPLS label to the WiMAX connection identifier CID, and according to the established relationship The mapping relationship classifies the MPLS service flows and then transmits them on the logical connections corresponding to the classifications in the WiMAX network.

Wherein, the method further comprises: setting, by the communication parties in the WiMAX network, the mapping relationship to advance:

The communicating parties in the WiMAX network inform each other that they support the classification of MPLS messages.

The mapping relationship between the MPLS label and the WiMAX CID in the communication between the two parties in the WiMAX network is:

The mapping relationship between the MPLS label and the WiMAX CI is statically set in the service identification convergence sublayer of the packet in the WiMAX network;

Or

The communication parties in the WiMAX network dynamically set the mapping relationship between the MPLS label and the WiMAX CID by adding a management message or a dynamic service modification management message to the dynamic service of the WiMAX network.

The communication between the MPLS label and the WiMAX CID is dynamically set by the communication partner in the WiMAX network by using the dynamic service add management message of the WiMAX network, where the sending end sends the dynamic service add request message to the receiving end to establish a logical connection. The dynamic service addition request message includes an MPLS packet type corresponding to the logical connection to be established, an MPLS label corresponding to the logical connection to be established, and a WiMAX CID of the logical connection to be established;

After receiving the dynamic service addition request message, the receiving end adds the dynamic service according to the dynamic service The MPLS packet type, the MPLS label, and the WiMAX CID in the request message establish a mapping relationship between the MPLS label and the WiMAX CID, and perform subsequent interaction with the sender to complete the establishment of the logical connection.

The dynamic service addition request message includes a convergence sub-layer description parameter, where the dynamic service addition request message includes an MPLS packet type corresponding to the logical connection to be established:

The convergence sublayer description parameter in the dynamic service addition request message indicates the MPLS packet type corresponding to the logical connection to be established.

The dynamic service addition request message includes a packet classification rule parameter, where the MPLS label corresponding to the logical connection to be established is included in the dynamic service addition request message:

The message classification rule parameter in the dynamic service addition request message indicates that the MPLS label corresponds to the logical connection to be established.

The MPLS label identification parameter is added to the packet classification rule parameter, where the packet classification rule parameter indicates that the MPLS label corresponding to the logical connection to be established is: the value of the MPLS label identification parameter is equal to The value of the tag identifier in the MPLS label corresponding to the logical connection to be established.

The MPLS experiment uses the bit parameter in the packet classification rule parameter, where the message classification rule parameter indicates that the MPLS label corresponding to the logical connection to be established is:

Let the MPLS experiment use the bit parameter to indicate the experimental use bit range in the MPLS label corresponding to the logical connection to be established.

The MPLS experiment uses the bit parameter in the packet classification rule parameter, where the message classification rule parameter indicates that the MPLS label corresponding to the logical connection to be established is: Let the MPLS experiment use the value of the bit parameter equal to the value of the experimental use bit in the MPLS label corresponding to the logical connection to be established.

With the technical solution provided by the present invention, the mapping of the MPLS service flow marked by the MPLS label to the "WiMAX radio access network data stream identified by the connection identifier (CID, Connection Identifier) can be implemented in the WiMAX radio access network. In the WiMAX radio access network, the data stream is classified according to the CID. That is, the present invention implements classification of the MPLS service flow in the WiMAX radio access network, so that the MPLS service flow is The corresponding suitable service is obtained in the WiMAX radio access network.

Figure 1 is a block diagram of a system to which the present invention is applied;

2 is a schematic diagram of a format of an MPLS data packet;

Figure 3 is a schematic diagram of the format of an MPLS label;

FIG. 4 is a flow chart of a method for classifying a multi-protocol label switching service flow according to the present invention. Mode for carrying out the invention

The present invention will be further described in detail below with reference to the accompanying drawings.

The core idea of the present invention is: Adding CS parameter settings supporting MPLS encapsulated messages in the parameters of the management message of the WiMAX network, so that the base station (BS, Base Station) and the user station (SS, Subscriber) in the WiMAX radio access network Stations can implement the mapping of MPLS labels to CIDs through interaction, thus completing the flow classification of MPLS packets.

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the system block diagram of the application, the remote broadband access device may be a small and medium-sized digital subscriber line access multiplexer DSLAM or a multi-service access network node MSAN, and access the final resident, enterprise or VPN user through the MPLS network. The SS is connected to the BS via a WiMAX network, such as WiMAX Backhaul. The BS is further connected to the core access device. The core access device can be an aggregation Ethernet switch, a router, or a large-scale DSLAM device that aggregates traffic onto an IP metropolitan area network MAN running MPLS technology.

On the remote broadband access device, you can provide MPLS services such as MPLS PWE3 or L2 VPN. As the BS and SS of the WiMAX Backhaul device, it is necessary to carry and transmit the MPLS data stream transmitted by these remote broadband access devices. The format of the MPLS data packet received by the BS on the side close to the core access device and on the side of the SS near the remote broadband access device is shown in Figure 2.

Figure 2 shows the encapsulation format of two types of packets: MPLS over 802.3 Ethemet (MPLS carried in 802.3/Ethernet format) and MPLS over 802.1Q VLAN (MPLS carried in 802.1Q VLAN format). Since the MPLS service flow is distinguished by the MPLS label, in the present invention, only the MPLS label, that is, the MPLS Label in Fig. 2, is described.

Since the MPLS label is not recognized inside the WiMAX network, the WiMAX device SS and BS are devices that transparently transmit MPLS service flows, and the MPLS label needs to be mapped to a CID that can be recognized inside the WiMAX network.

The MPLS label in the MPLS service flow may have one or more layers, as shown in Figure 2.

Label is the outermost label of the message. WiMA devices SS and BS act as devices that transparently transmit MPLS traffic, and only care about the outermost Outer Label.

Figure 3 shows the format of the MPLS label. Includes label identification Label ID and experiment usage bit EXP. The MPLS service flow is differentiated by the MPLS label. When the MPLS service is transparently transmitted, the remote broadband access device or the core access device needs to identify the label ID of the label in the Outer Label of the received PLS service stream. And/or the real face uses the EXP value to map to the corresponding CID value, and then distinguishes different MPLS service flows according to the CID value, and provides corresponding service shield QoS guarantee mechanisms respectively.

The mapping of the MPLS service flow to the WiMAX data flow to be implemented by the present invention includes three mapping relationships, as follows:

1. The mapping relationship between the 20-digit Label ID in the MPLS Outer Label and the 16-bit CID in the WiMAX data stream;

2. The mapping between the three bits in the MPLS Outer Label and the 16-bit CID in the WiMAX data stream, for example, mapping the MPLS traffic with an EXP value in a certain range to a WiMAX data stream with a certain CID;

3. The 16-bit Label ID in the MPLS Outer Label combines the mapping relationship between the 3-bit EXP and the 16-bit CID in the WiMAX data stream.

There may be many specific mapping methods depending on the number of streams that need to be implemented. For example, there are several mapping methods:

1. Use the Label ID to linearly find a RAM and get the CID corresponding to the Label. Or use the Label ID to perform Hash calculation, and then obtain an index value, and then look up the Hash bucket or linked list to get the CID corresponding to the Label.

2. Use EXP to linearly find a RAM and get the CID corresponding to the EXP.

3. After the Hash calculation is performed by using Label ID+EX, an index value is obtained, and the Hash bucket or the linked list is searched according to the obtained index value, and the CID corresponding to the Label combined EXP is obtained.

4. Use a special search device, such as CAM (Content Access Memory), to get the corresponding CID. After obtaining the CID corresponding to the MPLS label according to the mapping method described above, the mapping relationship adopted by the SS and the BS is required to be unified. In the implementation of the present invention, in order to unify the mapping relationship adopted by the SS and the BS, the static mapping may be manually performed, that is, the same mapping relationship is set on the SS and the BS respectively; or the corresponding traffic classification may be performed when the connection is dynamically established. Rule setting, this solution needs to extend management messages in the WiMAX network.

If the method of dynamically defining a traffic classification rule is adopted, the SS and the BS need to notify the other party to support the classification of MPLS packets when the SS registers with the BS. This can be done by extending the REG-REQ/RSP management message. When the SS registers with the BS, the SS sends a registration request REG-REQ management message to the BS, and the BS transmits a registration response REG-RSP management message to the SS to implement. These two management messages respectively declare the ability of the SS and BS to support the CS sublayer. Since the extension of the REG-REQ and REG-RSP management messages is the same in the embodiment of the present invention, the two management messages are represented by REG-REQ/RSP.

The specific expansion process is as follows:

The SDU Encapsulation Support (Service Data Unit Encapsulation Support) parameter definition in the Convergence Sublayer Capabilities parameter in the extended REG-REQ RSP management message is implemented in the SDU encapsulation supported by the reserved bit extension SS or BS. The SDU encapsulation format of MPLS over 802.3/Ethernet^ MPLS over 802.1Q VLAN is added to Packet CS. As shown in Table 1.

Table 1: Extended SDU Encapsulation Support Parameter Structure

Type Length (bytes) Value Message Name

7 2 Bit #0: ATM REG-REQ

Bit #1: Packet IPv4

REG-RSP

Bit #2: Packet IPv6

Bit #3: Packet 802.3/Ethernet

Bit #4: Packet 802.1Q VLAN Bit #5: Packet IPv4 over 802.3 Ethemet

Bit #6: Packet IPv6 over 802.3/Ethernet

Bit #7: Packet IPv4 over 802.1Q VLAN

Bit #8: Packet IPv6 over 802.1Q VLAN

Bit #9: Packet MPLS over 802.3/Ethernet

Bit #10 : Packet MPLS over 802.1Q VLAN

Bit #l l~15: Reserved bits, all are 0. The 9th bit (Bit #9) and the 10th bit (Bit #10) are extensions of the embodiment of the present invention.

After the extension, if the REG-REQ message received by the BS, the 9th bit of the SDU Encapsulation Support parameter is 1, the SS that sends the REG-REQ message supports the MPLS over 802.3/Ethernet service flow and the WiMAX data flow. If the 10th bit of the SDU Encapsulation Support parameter is 1, the SS that sends the REG-REQ message supports the MPLS over 802.1Q VLAN service flow and the WiMAX data flow. The mapping between the two.

Similarly, if the 9th bit of the SDU Encapsulation Support parameter is 1 in the REG-RPS message received by the SS, the BS that sends the REG-RSP message supports the MPLS over 802.3/Ethernet service flow and the WiMAX data stream. If the SS receives the REG-RSP message, the 10th bit of the SDU Encapsulation Support parameter is 1, indicating that the BS that sends the REG-RSP message supports the MPLS over 802.1Q VLAN service flow and the WiMAX data flow. Mapping.

After the SS registers with the BS, the SS or the BS can establish a logical new connection by sending a Dynamic Service Addition Request (DSA-REQ) message to the other party, and carry it in the DSA-REQ message. The CID is used to identify the new connection to be established. After the new connection is established, the WiMAX data stream can be sent and received over the connection.

In an embodiment of the present invention, in order to achieve corresponding distribution when a new connection is established The class rule setting, that is, mapping the MPLS service flow that satisfies certain conditions to the new connection, needs to further extend the Dynamic Service Addition (DSA) management message and the dynamic service modification (DSC, Dynamic) in the Packet CS. Service Change ) Manage messages to map the currently connected CID to a specific MPLS label. The DSA management message is a general name of a DSA-REQ, a DSA response message DSA-RSP, and a DSA acknowledgement message DSA-ACK, and the DSC management message is a DSC request message DSC-REQ.DSC response message DSC-RSP and a DSC acknowledgement message. A general term for DSC-ACK. In the description of embodiments of the invention, these messages are represented by DSA-x/DSC-x.

The specific expansion process is as follows.

First, the convergence sublayer in the extended DSA-REQ message describes the CS Specification parameter. The structure of the extended parameter is shown in Table 2.

Table 2: Structure of the extended CS Specification parameters

The purpose of the CS Specification parameter is to define which specific packet encapsulation format is used in the CS sublayer. In Table 2, the CS Specification parameter values are 10 and 11. It is an increase in the embodiment of the present invention. The extension parameter defines the addition of Packet MPLS over suz.i/Jbtnernet ( axtenaea κ

And Packet MPLS over 802.1Q VLAN (Extended) (MPLS packets carried in 802.1Q VLAN format) format. Therefore, if the stream to be distinguished is in the Packet MPLS over 802.3/Ethernet format, the value of this parameter is "10"; if the stream to be distinguished is in the Packet MPLS over 802.1 Q VLAN format, the value of this parameter is "11". ".

The DS or the BS that receives the DSA-REQ message, if the value of the CS Specification parameter is 10, indicates that the DSA-REQ message is set to Packet MPLS over 802.3/Ethernet. The mapping between the formatted MPLS service flow and the current connection. If the value of the CS Specification parameter is 10, the DSA-REQ message is the mapping relationship between the MPLS service flow of the Packet MPLS over 802.1Q VLAN and the current connection.

Secondly, the CS Parameter Encoding Rules is extended. The extended rules are shown in Table 3.

Table 3: Extended CS Parameter Encoding Rules Rules

The CS Parameter Encoding Rules rule is used to describe a particular format. The index number used by the Packet Classification Rule parameter for packet classification. In Table 3, the Packet Classification Rule parameter index of the Packet MPLS over number is 108, and the Packet MPLS over 802.1Q VLAN format packet is classified as 109. In other words, the Packet Classification Rule parameter with the index number of 108 is used to classify packets in the Packet MPLS over 802.3 / Ethernet format; the Packet Classification Rule parameter with the index number 109 is used to report the Packet MPLS over 802.1Q VLAN format. The text is classified.

Finally, the Packet Classification Rule parameters with index numbers 108 and 109 are extended, and the MPLS EXP and MPLS Label-ID parameters are added. The structure is as follows:

Table 4. Added MPLS EXP parameter structure

Table 5, Added MPLS Label - ID Parameter Structure

In the MPLS EXP parameter structure shown in Table 4 and the MPLS Label JD parameter structure shown in Table 5, among the value values of 3 bytes (24 bits), only the leftmost (highest) 201⁄23 is valid]^1 ^ 1^1^1—10 value; the rightmost (lowest) 4bits are invalid, and no comparison is made when matching. Of course, it is also possible that only the rightmost (lowest) 20 bits are valid MPLS Label-ID values; the leftmost (highest) 4 bits are invalid, and are not compared when matching. The purpose of the Packet Classification Rule parameter is to map the MPLS label to the CID carried in the DSA-REQ message. For example, if the MPLS label with the Label_ID of a certain value needs to be mapped to the current CID, the MPLS Label_ID parameter may be set to the specific value in the DSA-REQ message. If the MPLS label with the EXP greater than or equal to 2 and less than or equal to 5 is mapped to the current CID, the EXP-low of the MPLS EXP parameter is 2 and the EXP-high is 5 in the DSA-REQ message. If the MPLS label with the EXP equal to a certain value needs to be mapped to the current CID, the EXP-low and EXP-high of the MPLS EXP parameter may be the specific value in the DSA-REQ message. Of course, the MPLS EXP parameter may be only one byte. If the MPLS label with the EXP equal to a certain value needs to be mapped to the current CID, the MPLS EXP parameter is set to the specific value in the DSA-REQ message. Just fine.

It should be noted that, in the embodiment of the present invention, the DSA-REQ message only needs to carry at least one of an MPLS Label-ID parameter and an MPLS EXP parameter.

Similarly, for DSC-REQ messages, the MPLS EXP parameters and the MPLS Label-ID parameters can be similarly carried. The difference is that the DSA-REQ message is to establish a new MPLS label to CID mapping, and the DSC-REQ message is to modify the existing mapping relationship.

After the definition of the traffic classification rule and the extension of the related message, the MPLS service flow can be classified in the WiMAX radio access network, so that the MPLS service flow can obtain the appropriate service. It should be noted that, in the foregoing extension of the related message, the reserved bit of the existing parameter is used to extend the related message. As an alternative, the related message may also be extended by setting a custom parameter. The methods of extension are basically the same and will not be described here.

The above-mentioned extension does not affect the PHS parameter configuration of the CS sub-layer. For MPLS over 802.3/Ethernet, MPLS over 802.1 Q VLAN packets can be used as Packet. CS's PHS setting, to complete the PHS function.

Please refer to FIG. 4. FIG. 4 is a flowchart of a method for classifying a multi-protocol label switching service flow according to an embodiment of the present invention.

Step U01: The sending end sends a DSA-REQ message to the receiving end to establish a logical connection, and specifies an MPLS label corresponding to the logical connection to be established in the DSA-REQ message.

Since the DSA-REQ message may be sent by the SS to the BS or the BS may be sent to the SS, in the following description, the sender is used to indicate the party that sent the DSA-REQ message, and the party that receives the DSA-REQ message is identified by the receiver. .

In addition, since the logical connection and the CID are corresponding to each other in the WiMAX network, the MPLS label corresponding to the logical connection to be established is specified, that is, the mapping relationship between the CID and the MPLS label is specified.

Specifically, the sender indicates that the current connection is to process the packet in the Packet MPLS over 802.3 Ethemet format by setting the value of the CS Specification parameter in the DSA-REQ message to 10; the index in the sender and even in the DSA-REQ message. The value of the MPLS EXP parameter and the MPLS Label_ID parameter in the Packet Classification Rule parameter of number 108, such that the MPLS label combined by the MPLS EXP parameter and the MPLS Label-ID parameter corresponds to the CID of the logical connection to be established. .

Or, the sending end indicates that the current connection is to process the packet in the Packet MPLS over 802.1 Q VLAN format by setting the value of the CS Specification parameter in the DSA-REQ message to be 11; the index number in the sending end and even in the DSA-REQ message. The value of the MPLS EXP parameter and the MPLS Label_ID parameter in the Packet Classification Rule parameter of 109 is such that the MPLS label combined by the MPLS EXP parameter and the MPLS LabelJD parameter corresponds to the CID of the logical connection to be established.

Step U02: The receiving end determines whether it supports the classification of the MPLS packet. If yes, the process proceeds to step U03. Otherwise, the process proceeds to step U06. Step U03: The receiving end establishes an MPLS service flow with a specific MPLS label according to the value of the MPLS EXP parameter and the MPLS Label_ID parameter in the CS Specification parameter and the Packet Classification Rule parameter in the DSA-REQ message, and the logic to be established. The mapping between WiMAX data streams on the connection.

In this way, when the receiving end receives the MPLS service flow sent by the MPLS connected to itself, it can correspond to the WiMAX data stream according to the MPLS label carried in the MPLS service flow.

Step U04: The receiving end and the sending end perform subsequent interactions to complete the establishment of the logical connection. Here, the receiving end sends a DSA-RSP message to the transmitting end, and the transmitting end sends a DSA-ACK message to the receiving end.

Step U05: Transmitting the MPLS service flow with the specific label on the established logical connection.

There can be multiple logical connections between the BS and the SS. Therefore, if for each logical connection, the MPLS service flow corresponding to the logical connection is specified, the PLS service flow is actually classified. After receiving the MPLS packet, the BS or the SS can perform the MPLS label carried in the packet and the mapping relationship between the MPLS label and the CID, and the packets with different MPLS labels can be connected through different logical connections. Transfer. On the other hand, within the WiMAX network, different service types can be provided according to the CID, such as different QoS guarantee mechanisms. This provides different service types for MPLS traffic with different MPLS labels in WiMAX networks.

Step U06, ending the current process.

If the BS or SS wants to change the MPLS traffic corresponding to a logical connection, it only needs to send a DSC-REQ message to the other party through the logical connection.

Figure 4 is actually a flow chart for setting the mapping relationship between CID and MPLS labels when establishing a new connection between the SS and the BS. Generally speaking, before this, SS and BS need to know each other's support. Classify MPLS service flows. For a BS that supports classification of MPLS service flows, only when the REG-REQ message is known that the SS also supports classification of the MPLS service flow, the MPLS label and the CID are established when a new logical connection is subsequently established. Mapping relations. Similarly, for an SS that supports classification of MPLS service flows, only when the REG-RSP message is known to support the classification of the MPLS service flow by the BS, the MPLS label and the MPLS label are established when a new logical connection is subsequently established. CID mapping relationship.

However, such mutual notification between the BS and the SS is not necessary. Because according to the above process, if the SS supporting the classification of the MPLS service flow transmits a DSA-REQ message to the BS that does not support the classification of the MPLS service flow, a new connection is established, and the new logical connection is established when the new logical connection is established. The mapping between MPLS labels and CIDs does not support the processing of such DSA-REQs for BSs that classify MPLS service flows. Therefore, new logical connections cannot be established. vice versa.

In summary, the above description is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Any modifications, equivalents, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

A method for classifying a multi-protocol label switching service flow, characterized in that: the communication parties in the world microwave interoperating WiMAX network set a mapping relationship between the multi-protocol label switching MPLS label to the WiMAX connection identifier CID, and according to The established mapping relationship classifies the MPLS service flow and then transmits it on the logical connection corresponding to the classification in the WiMAX network.

The method according to claim 1, wherein the method further comprises: before the communication parties in the WiMAX network set the mapping relationship:

The communicating parties in the WiMAX network inform each other that they support the classification of MPLS packets.

The method according to claim 2, wherein the two communication parties in the WiMAX network are a subscriber station SS and a base station BS, and the two communicating parties in the WiMAX network notify each other to support the classification of the MPLS packet. Includes:

The SS sends a registration request message to the BS for registration, and carries a parameter for indicating that the MPLS packet is supported by the SS in the registration request message;

After receiving the registration request message sent by the SS, the BS sends a registration response message to the SS, and the registration response message carries a parameter indicating that it supports the classification of the MPLS message.

The method according to claim 3, wherein the registration request message and the registration response message include a service data unit encapsulation support parameter, and the SS is carried in the registration request message to indicate that the self-supports the MPLS report. The parameters for classification are:

When the SS sends the registration request message, the value of the service data unit encapsulation support parameter in the registration request message is a specific value indicating that the MPLS packet is supported for classification;

The parameter that the BS carries in the registration response message to indicate that it supports the classification of the MPLS packet is: When the BS sends the registration response message, the value of the service data unit encapsulation support parameter in the registration response message is a specific value indicating that the MPLS packet is supported for classification.

The method according to claim 1, wherein the mapping relationship between the MPLS label and the WiMAX CID is set by the communication parties in the WiMAX network:

The mapping relationship between the MPLS label and the WiMAX CID is statically set in the service identification convergence sublayer of the packet in the WiMAX network;

Or

The method according to claim 5, wherein the communication between the MPLS label and the WiMAX CID is dynamically set by the communication parties in the WiMAX network through the WiMAX dynamic service addition management message, including:

The sending end sends a dynamic service add request message to the receiving end to establish a logical connection, where the dynamic service add request message includes an MPLS packet type corresponding to the logical connection to be established, an MPLS label corresponding to the logical connection to be established, and The WiMAX CID of the logical connection to be established;

After receiving the dynamic service addition request message, the receiving end establishes a mapping relationship between the MPLS label and the WiMAX CID according to the MPLS packet type, the MPLS label, and the WiMAX CID in the dynamic service addition request message, and performs the mapping relationship between the MPLS label and the WiMAX CID. Subsequent interactions complete the establishment of a logical connection.

The method according to claim 6, wherein the dynamic service addition request message includes a convergence sublayer description parameter, where the dynamic service addition request message includes a logical connection corresponding to the logical connection to be established. The MPLS · 艮 type is:

Let the convergence sublayer in the dynamic service add request message indicate the parameter representation and the desired The logical connection corresponds to the MPLS packet type.

The method according to claim 6, wherein the dynamic service addition request message includes a message classification rule parameter, where the dynamic service addition request message includes a logical connection corresponding to the logical connection to be established. The MPLS label is:

The method according to claim 8, wherein a PLS tag identification parameter is added to the message classification rule parameter, and the parameter classification rule parameter indicates that the MPLS label corresponding to the logical connection to be established is :

The value of the MPLS label identification parameter is equal to the value of the label identifier in the MPLS label corresponding to the logical connection to be established.

The method according to claim 9, wherein the MPLS label identification parameter is a 24-bit binary number, and the label identifier in the MPLS label is a 20-bit binary number, and the value of the MPLS label identification parameter is determined. , the value of the tag identifier in the MPLS label corresponding to the logical connection to be established is:

The lower 20 bits of the MPLS label identification parameter are equal to the label identifier in the MPLS label;

Or

The upper 20 bits of the MPLS label identification parameter are equal to the label identifier in the MPLS label.

The method according to claim 8, wherein the MPLS experiment uses a bit parameter in the message classification rule parameter, and the message classification rule parameter indicates an MPLS label corresponding to the logical connection to be established. For:

12. The method according to claim 8, wherein the MPLS experiment uses a bit parameter in the message classification rule parameter, where the message classification rule parameter indicates an MPLS label corresponding to the logical connection to be established. For:

Let the MPLS experiment use the value of the bit parameter equal to the value of the experimental use bit in the MPLS label corresponding to the logical connection to be established.

The method according to claim 6, wherein the method further comprises: after receiving the dynamic service addition request message by the receiving end, the method further comprises:

The receiving end determines whether it supports the classification of MPLS packets. If it supports, the mapping between MPLS labels and WiMAX CIDs is established. Otherwise, the current process ends.