WO2017041579A1 - Link quality detection method and apparatus - Google Patents

Abstract

A link quality detection method and apparatus, which are applied to a network element containing one or more processing boards and one or more interface boards. The method comprises: a network element forwarding via an interface board a session request message of a client via a processing board to a service end, wherein the session request message carries a single board identifier; and after receiving a session response message sent by the service end via the interface board, the network element sending same to a corresponding processing board according to the single board identifier carried in the session response message. Compared with the relevant art, the embodiments of the present invention realize link quality detection in the interior of a distributed network element, and provide more accurate data for an IP performance of each processing board in a network.

Description

Link quality detection method and device Technical field

This document relates to, but is not limited to, the field of network communication, and in particular, to a method and apparatus for implementing link quality detection.

Background technique

The Two-Way Active Measurement Protocol (TWAMP) defines a method for measuring the round-trip Internet Protocol (IP) performance between any two devices supporting this standard in the network. TWAMP defines two sets of protocols: one for establishing a performance test session, called a control session, and the other for the transmission and reception of performance measurement probes, called a test session. The control session allows a client and server to negotiate and initiate a performance test session. The test session's transmit and receive protocols define the packet format required to measure round-trip performance. With TWAMP, the full IP performance of the transmission can be effectively measured by cooperation between already deployed network devices.

The distributed architecture network element includes an interface board and a processing board. Interface boards and processing boards are typically in the form of one-to-many or many-to-many. In order to reduce the occupation of the public network IP address, multiple processing boards usually share the IP address of a public network, and packets are forwarded from the interface board. In the related art, when the TWAMP is used to measure the network performance of the distributed network element, the interface board and the external server establish a control session and a test session to complete the quality detection data of the external link of the network element. For the internal channel of the network element, that is, the link quality detection between the interface board and the processing board, the current measurement scheme is not considered. Under the requirement of end-to-end detection of services, quality detection of links inside distributed network elements is an urgent problem to be solved in the field of network communication.

Summary of the invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

The embodiment of the invention provides a method and a device for implementing link quality detection, which can implement detection of internal link quality of a distributed network element.

According to an aspect of the embodiments of the present invention, a method for implementing link quality detection is provided, which is applied to a network element including a plurality of processing boards and a plurality of interface boards.

The network element forwards the session request packet of the client to the server through the interface board, and the session request packet carries the board identifier.

After receiving the session response packet sent by the server, the network element sends the session response packet sent by the server to the corresponding processing board according to the identifier of the board carried in the session response packet.

Optionally, when the session request includes a control session request, the session request message includes a control session request message, where the session request message carries a board identifier, including:

The board identifier is carried in the control session request message as a client port number.

Optionally, when the session request includes a test session request, the session request message includes a test session request message, where the session request message carries a board identifier, including: filling the board identifier into the test In the padding field of the session request message.

Optionally, the method further includes: after the board identifier is filled into a padding field of a test session request message,

The feature code flag is filled in the front of the padding field of the padded board to indicate that the board identifier is included in the padding field.

Optionally, the padding field includes at least two repeating sequences; wherein each of the repeating sequences respectively includes the corresponding signature code and the board identifier.

Optionally, the repeating sequence is 27 bytes.

According to another aspect of the embodiments of the present invention, a method for implementing link quality measurement is provided, which is applied to a server, and the method includes:

Receiving a session request message that is sent by the network element and carrying the identifier of the board;

The board identifier is carried in the session response packet and fed back to the network element.

Optionally, the method further includes: when the received session request message includes a control session request message, the board identifier carried by the control session request packet is used as a destination port and a server port number as a source. The port is fed back to the network element.

Optionally, the method further includes: when the received session request message includes a test session request message, obtaining the board identifier from a padding field of the test session request message, and The board ID is filled in the padding field of the test session response packet and fed back to the network element.

Optionally, the padding field of the test session request packet includes at least two repetitive sequences, where each of the repetitive sequences includes the board identifier, and the board identifier is filled into the test session response report. The padding fields in the text include:

Extracting a repeating sequence from the padding field of the test session request message, and populating the remaining repeating sequence into the padding field of the test session response message.

According to still another aspect of the embodiments of the present invention, an apparatus for implementing link quality detection includes:

The processing board is configured to forward the session request packet sent by the client with the board identifier to the server through the interface board.

The interface board is configured to send the session response packet sent by the server to the corresponding processing board according to the identifier of the board carried in the session response packet.

Optionally, the device is applied to a distributed network element.

According to still another aspect of the embodiments of the present invention, an apparatus for implementing link quality detection includes:

The receiving unit is configured to receive a session request packet that is sent by the network element and carries the identifier of the board.

The processing unit is configured to carry the board identifier in the session response packet;

The sending unit is configured to feed back the session response message to the network element.

Optionally, the device is applied to a server.

Compared with the related art, the technical solution provided by the embodiment of the present invention includes: applying to a network element that includes one or more processing boards and one or more interface boards, including: the network element requests a session of the client through the processing board. The packet is forwarded to the server through the interface board. The session request packet carries the board identifier. The network element receives the session response packet sent by the server through the interface board, and then the board identifier is carried in the session response packet. Send to the corresponding processing board. Compared with the related art, the embodiment of the present invention implements link quality detection within a distributed network element, and provides more accurate data for obtaining IP performance of each processing board in the network.

The method and the device provided by the embodiment of the present invention, by setting a client in a processing board of a distributed network element, the client of each processing board can separately initiate a TWAMP control session and/or a test session, and carry the processing board. A unique identifier is sent by the server to the corresponding client when the server returns a response packet. The interface board distributes the response packet to the corresponding client through the identifier. The packet can complete the quality measurement of the link inside the NE. Compared with the related art, the embodiment of the present invention can quickly implement the quality measurement of the link inside the distributed network element, and provide more accurate data for obtaining the IP performance of each processing board in the network.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

BRIEF abstract

FIG. 1 is a flowchart of a method for implementing link quality detection according to an embodiment of the present invention;

2 is a flowchart of a process for implementing a control session according to an embodiment of the present invention;

3 is a schematic diagram of addressing a client port number according to an embodiment of the present invention;

4 is a flowchart of implementing a test session according to an embodiment of the present invention;

5 is a package format diagram of a test session request message in the related art;

6 is a package format diagram of a test session response message in the related art;

7 is a package format diagram of a test session request packet according to an embodiment of the present invention;

FIG. 8 is a flowchart of a method for implementing link quality measurement according to an embodiment of the present invention;

9 is a package format diagram of a test session response packet according to an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of an apparatus for implementing link quality detection according to an embodiment of the present invention;

FIG. 11 is a schematic structural diagram of an apparatus for implementing link quality detection according to an embodiment of the present invention.

Embodiments of the invention

Embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other.

Referring to FIG. 1, an embodiment of the present invention provides a method for implementing link quality detection, which is applied to a network element including one or more processing boards and one or more interface boards, including:

Step 101: The network element forwards the session request packet of the client to the server through the interface board, and the session request packet carries the board identifier.

Step 102: After receiving the session response packet sent by the server, the network element sends the session response packet sent by the server to the corresponding processing board according to the identifier of the board carried in the session response packet.

It should be noted that the network element in this embodiment of the present invention may include a unified access controller (uMAC, Unified mobile access controller) A network element or a radio network controller (RNC) network element.

Optionally, when the session request includes the control session request, the session request packet includes a control session request packet, where the session request packet carries the board identifier, including:

The board ID is carried in the control session request packet as the client port number.

When the session request includes the test session request, the session request message includes the test session request message, and the session request message carries the board identifier, including: filling the board identifier into the padding field of the test session request message.

Optionally, the method of the embodiment of the present invention further includes: after the board identifier is filled into a padding field of a test session request message,

The feature code flag is filled in the front part of the padding field of the padded board identifier to indicate that the padding field includes the board identifier.

Optionally, the padding field includes at least two repeating sequences; wherein each of the repeating sequences respectively includes the corresponding signature code and the board identifier.

Optionally, the repeating sequence is 27 bytes.

The embodiments of the present invention are described below in conjunction with the accompanying drawings and embodiments. It is to be understood that the embodiments described herein are merely illustrative of the invention and are not limiting of the invention.

As mentioned above, TWAMP defines two sets of protocols: control sessions and test sessions. The following describes the implementation process of two sessions in a distributed client.

Referring to FIG. 2, the flow of the control session is implemented in the embodiment of the present invention, including the implementation process of the TWAMP control session in the distributed client. The embodiment of the present invention is described by using the processing board 1 and the client 1 as an implementation example, including:

In step 201, the client 1 of the processing board 1 sends a control session request to the interface board to initiate a TWAMP control session. The port number carried in the control session request packet of the embodiment of the present invention includes the board identifier 1 of the processing board.

When a TWAMP control session is established, the packets of the control session may be selected using the Transmission Control Protocol (TCP) protocol, including the source port and the destination port. In the control session request message, the TCP port number of the server may include a well-known port number 862, guest The client TCP port number is dynamically assigned by the client. For the addressing mode of the TCP port number of the client, see Figure 3, including the board type and board identification field. The board identifier field is located in the low bit of the client port number. In the embodiment of the present invention, the board identifier is carried in the control session request packet as the client port number, and the internal distribution of the control session packet of the link quality detection in the distributed system network element is implemented.

Step 202: After receiving the control session request message of the processing board 1, the interface board sends the route directly to the server.

Step 203: The interface board receives the control session response packet of the server, and parses the board identifier 1 of the destination port in the control session response packet, and directly distributes the packet to the processing board 1 according to the board identifier.

Step 204: The client 1 receives the control session response message and controls the session establishment link.

The above describes how the TWAMP distributed client establishes a control session process. After the TWAMP control session is established, the client and the server start the establishment of a test session for measuring the internal link quality.

Referring to FIG. 4, the process of implementing a test session, including the implementation process of a TWAMP test session in a distributed client, includes:

Step 401: The processing board forwards the session request packet of the client to the server through the interface board. The session request packet carries the board identifier. The session request message of the embodiment of the present invention includes a test session request message.

For the TWAMP test session, RFC 5357 defines two types of message formats: the client test session request message (Sender Test Packet) and the server test session response message (Reflector Test Packet), as shown in FIG. 5 and FIG. 6, respectively. The Sender Test Packet does not contain a padding field that is 14 bytes in length, and the Reflector Test Packet does not contain a padding field that is 41 bytes in length.

Optionally, the client Sender Test Packet message format is modified. The processing board fills the board ID into the padding field of the test session request message. The padding field can also be filled with the signature of the board, which is used to mark the board identifier in the padding field.

Optionally, in the embodiment of the present invention, the padding field includes at least two repeating sequences; wherein each of the repeating sequences includes a corresponding feature code flag and a board identifier. Optionally, from the padding field The first byte and the 27*N (N is a positive integer) byte start to fill the signature flag and the board identifier respectively. Thus, the padding field of the Sender Test Packet includes at least two repeating sequences. Each sequence is filled with a signature identifier and a board identifier. Among them, each repeating sequence is 27 bytes. The feature code flag can be used to identify the probability of miscellaneous packet distribution. The board identifier can occupy two bytes for the interface board packet distribution policy. .

Optionally, if the minimum length of the client Sender Test Packet message is 68 bytes and the padding byte number is at least 54 bytes, the "5A5445" signature flag and the board identification field may be from the packet. The 14 bytes and the 41st byte are filled. The format of the filled message can be as shown in FIG. 7.

Step 402: The interface board receives the test session request packet sent by the client 1, and directly sends the test session request packet.

Step 403: After receiving the test session response message sent by the server, the interface board sends the test session response message to the corresponding processing board according to the board identifier carried in the session response message.

After receiving the test session response packet Reflector Test Packet from the server, the interface board needs to obtain the board identifier from the padding field of the packet. The packet is sent to the processing board according to the board identifier. The interface board obtains the signature of the signature in the padding field. If the signature is the same, the board identifier is obtained.

Optionally, in the embodiment of the present invention, if the 41st byte of the test session response message of the server starts to match the "5A5445" signature code first: if the signature code is different, the packet needs to be discarded; if the signature is If the same is true, the board identification 1 field is obtained from the 45 bytes of the packet. The test session response packet is directly distributed to the processing board 1 according to the "board identification 1" field. The embodiment of the present invention facilitates the identification of distributed clients and packet distribution by carrying the board identification field in the test session.

In step 404, the client 1 receives the test session response message and completes a test session interaction.

The client can perform the measurement of the link quality from the processing board to the server through the packet exchange of multiple test sessions, that is, the measurement of the link quality data inside the network element. The measurement data can be directly used for service policy control on the processing board to meet the end-to-end detection requirements of the service.

The embodiment of the invention further provides a computer storage medium, wherein the computer storage medium stores computer executable instructions, and the computer executable instructions are used to execute the link quality measurement method.

Referring to FIG. 8, an embodiment of the present invention further provides a method for implementing link quality measurement, which is applied to a server, and includes:

Step 801: Receive a session request packet that is sent by the network element and carries the identifier of the board.

In step 801, the board identifier is carried in the session response packet and fed back to the network element.

Optionally, the method of the embodiment of the present invention further includes: when the session request message includes the control session request message, after receiving the control session request message of the TWAMP of the client, the server receives the source port and the destination port in the message. The exchange is performed, and the control session response packet is sent to the interface board. Optionally, when the received session request packet is a control session request packet, the board identifier of the control session request packet is used as the source port and the server port number as the source port, and is fed back to the network element.

Optionally, the board identifier is obtained from the padding field of the test session request packet, and the board identifier is filled in the padding field of the test session response packet, and is fed back to the network element. The padding field includes at least two repeating sequences, and the board identifier is located in each repeating sequence; the repeating sequence is removed from the padding field of the test session request message, and the remaining repeating sequence is filled into the padding field of the test session response message.

When implementing the Reflector Test Packet message, the TWAMP protocol requires the server to reuse the Sender Test Packet packet padding field of the client, so that the Reflector Test Packet message has the same length as the Sender Test Packet message.

Optionally, referring to FIG. 9, after the header or the tail of the padding field of the Sender Test Packet of the client is truncated by 27 bytes, the padding field of the Reflector Test Packet of the server is re-used by the Sender Test Packet packet to be truncated. The remaining fields.

The padding field of the Sender Test Packet includes at least two repeating sequences, and the board identifier is located in each repeating sequence. When the server reuses the Sender Test Packet field, the server culls a repeated sequence from the padding field of the test session request message, and fills the remaining repetitive sequence into the padding field of the test session request message. When culling a repeating sequence, whether it is truncated from the head or truncated at the end of the word 27 words In the embodiment of the present invention, the Reflector Test Packet message format shown in FIG. 7 can be used to carry the "feature code flag" and the "board identifier" field.

The embodiment of the invention further provides a computer storage medium, wherein the computer storage medium stores computer executable instructions, and the computer executable instructions are used to execute the link quality measurement method.

Referring to FIG. 10, an embodiment of the present invention further provides an apparatus for implementing link quality detection, including:

The processing board is configured to forward the session request packet sent by the client with the board identifier to the server through the interface board.

The interface board is configured to send the session response packet sent by the server to the corresponding processing board according to the board identifier carried in the session response packet.

Optionally, the device in the embodiment of the present invention may be applied to a distributed network element.

It should be noted that the device in the embodiment of the present invention may also be connected to the network element as an independent entity to implement the embodiment of the present invention.

Referring to FIG. 11, an embodiment of the present invention further provides an apparatus for implementing link quality detection, including:

The receiving unit is configured to receive a session request packet that is sent by the network element and carries the identifier of the board.

The processing unit is configured to carry the board identifier in the session response packet;

The sending unit is configured to feed back the session response message to the network element.

Optionally, the device in the embodiment of the present invention may be applied to a server.

It should be noted that the device in the embodiment of the present invention may also be connected to the server as a separate entity to implement the embodiment of the present invention.

In the method for detecting link quality provided by the embodiment of the present invention, the client is separately set in the processing board of the distributed network element, and the client of each processing board can separately initiate a control session/test session, and the processing board is carried in the session. The unique identifier of the link is used by the interface board to distribute the response packet of the server to the corresponding client. The client can complete the performance measurement of the link inside the network element according to the response packet. Compared with related technologies, the network performance of the network element is quickly implemented in the embodiment of the present invention. Measurements, combined with related art external link quality detection, provide more accurate data for obtaining IP performance of each processing board in the network.

A person skilled in the art can understand that all or part of the process of implementing the above embodiment method can be completed by a computer program to instruct related hardware, and the program can be stored in a computer readable storage medium. The flow of an embodiment of the method as in the above embodiment may be included.

One of ordinary skill in the art will appreciate that all or a portion of the above steps may be performed by a program to instruct related hardware, such as a processor, which may be stored in a computer readable storage medium, such as a read only memory, disk or optical disk. Wait. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the foregoing embodiment may be implemented in the form of hardware, for example, by implementing an integrated circuit to implement its corresponding function, or may be implemented in the form of a software function module, for example, being executed by a processor and stored in a memory. Programs/instructions to implement their respective functions. The invention is not limited to any specific form of combination of hardware and software.

The embodiments disclosed in the present application are as described above, but the descriptions are only for the purpose of understanding the present application, and are not intended to limit the present application, such as the specific implementation method in the embodiments of the present invention. Any modifications and changes in the form and details of the embodiments may be made by those skilled in the art without departing from the spirit and scope of the disclosure. The scope defined by the appended claims shall prevail.

Industrial applicability

The foregoing technical solution implements link quality detection inside a distributed network element.

Claims (14)

A method for implementing link quality detection is applied to a network element including one or more processing boards and one or more interface boards, the method comprising: The network element forwards the session request packet of the client to the server through the interface board, and the session request packet carries the board identifier. After receiving the session response packet sent by the server, the network element sends the session response packet sent by the server to the corresponding processing board according to the identifier of the board carried in the session response packet. The method of claim 1 wherein When the session request includes a control session request, the session request message includes a control session request message, and the board request message carries a board identifier including: The board identifier is carried in the control session request message as a client port number. The method of claim 1 or 2, wherein When the session request includes the test session request, the session request message includes a test session request message, and the board request message carries the board identifier, including: filling the board identifier into the test session request message. In the padding field. The method of claim 3, the method further comprising: after the board identifier is filled into a padding field of a test session request message, The feature code flag is filled in the front of the padding field of the padded board to indicate that the board identifier is included in the padding field. The method of claim 4, wherein The padding field includes at least two repeating sequences; wherein each of the repeating sequences respectively includes the corresponding signature code and the board identifier. The method of claim 5, wherein The repeating sequence is 27 bytes. A method for implementing link quality measurement is applied to a server, and the method includes: Receiving a session request message that is sent by the network element and carrying the identifier of the board; The board identifier is carried in the session response packet and fed back to the network element. The method of claim 7, the method further comprising: receiving the session request message, including the board identifier carried by the control session request message as a destination port, and a service when the session request message is controlled. The port number is used as the source port and is fed back to the network element. The method according to claim 7 or 8, the method further comprising: when the received session request message includes a test session request message, obtaining the single ticket from a padding field of the test session request message The board identifier is filled in the padding field of the test session response packet and fed back to the network element. The method of claim 9, wherein the padding field of the test session request message includes at least two repeating sequences, each of the repeating sequences respectively including the board identifier; The padding field that identifies the padding to the test session response message includes: Extracting a repeating sequence from the padding field of the test session request message, and populating the remaining repeating sequence into the padding field of the test session response message. A device for implementing link quality detection, comprising: The processing board is configured to forward the session request packet sent by the client with the board identifier to the server through the interface board. The interface board is configured to send the session response packet sent by the server to the corresponding processing board according to the identifier of the board carried in the session response packet. The apparatus of claim 11 wherein said apparatus is applied to a distributed network element. A device for implementing link quality detection, comprising: The receiving unit is configured to receive a session request packet that is sent by the network element and carries the identifier of the board. The processing unit is configured to carry the board identifier in the session response packet; The sending unit is configured to feed back the session response message to the network element. The apparatus of claim 13 wherein said apparatus is applied to a server.

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