WO2007033555A1

WO2007033555A1 - Method, device and system for obtaining link performance parameter

Info

Publication number: WO2007033555A1
Application number: PCT/CN2006/001765
Authority: WO
Inventors: Jian Li; You Gao
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2005-09-19
Filing date: 2006-07-19
Publication date: 2007-03-29
Also published as: CN1863100A; CN100421395C

Abstract

A method for obtaining link performance parameter includes the sending node sending request message to the opposite terminal node of the link which is to be measured; the opposite terminal node identifying that said received message is said request message returning response message which is carrying time information to sending node the said time information includes the time at which receiving request message as the first reception time as well as the time at which sending response message as the second sending time; the sending node determining that the received message is the response message, counting processing time of opposite terminal node according to the time information carried in the response message the sending node counting link parameter performance according to the time of sending request message , the time of receiving response message as well as the said processing time. The present invention also includes sending node and opposite terminal node as well as the system for obtaining link parameter performance corresponding to the said method. Adopting the present invention's technology can improve measure accuracy to the communication link performance parameter.

Description

Method, device and system for obtaining communication link performance parameters

Technical field

The present invention relates to the field of network communication technologies, and in particular, to a method, device and system for obtaining performance parameters of a communication link. Background of the invention

Transmission delay, jitter, and packet loss rate are important communication link performance parameters for the management and maintenance of communication links. The method for measuring the transmission delay and the jitter in the prior art is: sending, by the measuring end node, a request message to the opposite end node of the link to be measured, and recording the time at which the request message is sent as the sending time; After receiving the request message, the corresponding response message is sent to the measurement end node; when the measurement end node receives the response message sent back by the opposite end node, the time at which the response message is received is recorded as the reception time. Then, the measuring end node determines the difference between the receiving time and the sending time as the transmission delay of the message communication link, and determines the jitter of the message communication link according to the multiple transmission delays.

In the prior art, the difference between the receiving time and the sending time includes the processing time of the request message by the opposite node of the link to be measured. In some cases, the processing time of the packet by the peer node is larger than that of the link, which results in inaccurate measurement of link performance parameters such as transmission delay and jitter of the communication link. Summary of the invention

In view of this, the present invention provides a method for obtaining performance parameters of a communication link, which improves the accuracy of measurement of performance parameters of a communication link.

The present invention also provides an apparatus for obtaining performance parameters of a communication link, which improves the accuracy of measurement of performance parameters of a communication link. The present invention also provides a system for obtaining communication link performance parameters, which improves the accuracy of measurement of communication link performance parameters.

The specific technical solutions of the present invention are as follows:

A method for obtaining link performance parameters includes the following steps:

The sending node sends a request message to the opposite node of the link to be measured;

The peer node determines that the received packet is the request packet, and returns a response packet carrying the time information to the sending node, where the time information includes the time of receiving the request message as the first receiving time, and The time at which the response message is transmitted at the second transmission time;

The sending node determines that the received packet is the response packet, and calculates the processing time of the peer node according to the time information carried in the response packet;

The sending node calculates the link performance parameter according to the time at which the request message is sent, the time at which the response message is received, and the processing time.

The calculating, by the sending node, the processing time of the peer node according to the time information carried in the response packet includes:

The sending node extracts the first receiving time and the second sending time from the response message; the sending node uses the absolute value of the difference between the first receiving time and the second sending time as the processing time of the opposite node.

The sending node sends a request message to the opposite end node of the link to be measured: the sending node carries the sending time of the request message as the first sending time in the request message and sends the request message to the opposite node;

The method further includes: when the opposite node returns a response message carrying the time information to the sending node:

The first sending moment that is extracted from the request packet is carried in the response packet, and the sending node calculates the link performance parameter according to the time of sending the request packet, the time of receiving the response packet, and the processing time, including: The sending node records the time when the response message is received as the second receiving time;

The transmitting node calculates the absolute value of the difference between the first transmission time and the second reception time, and then subtracts the processing time from the obtained absolute value, and the result is the instantaneous transmission delay of the self to the opposite node.

The method further includes: when the peer node returns a response packet carrying the time information to the sending node:

The peer node generates check information according to the first receiving time and the second sending time, and carries the obtained check information in the response message;

The method further includes: after the sending node receives the response message:

The sending node checks whether the first receiving time and the second sending time match the check information. If yes, the processing time of the opposite node is calculated according to the time information carried in the response message, otherwise the response is discarded. The message ends and the current process ends.

The method further includes: when the sending node sends the request packet to the opposite node of the link to be measured:

The sending node generates the check information according to the first sending time, and carries the check information in the request message. The method further includes: after receiving the request message by the peer node:

The peer node checks whether the first sending moment matches the check information, and if yes, returns a response packet carrying the time information to the sending node, otherwise discards the request message and ends the current process.

The peer node generates the verification information according to the first sending time, the first receiving time, and the second sending time, and carries the obtained verification information in the response message;

Checking the first sending moment, the first receiving moment, and the second sending moment with the check If the information matches, the processing time of the peer node is calculated according to the time information carried in the response packet, otherwise the response packet is discarded and the current process is ended.

The first identifier indicating the packet type is the request packet, and the second identifier indicating that the packet type is the response packet, where the sending node sends a request to the opposite node of the link to be measured. The message further includes:

The sending node carries the first identifier in the request packet;

Then, the peer node determines that the received packet is the request packet:

The peer node determines, according to the first identifier in the received packet, that the received packet is the request packet;

The peer node carries the second identifier in the response packet;

The sending node determines that the received packet is the response packet:

The sending node determines, according to the second identifier in the received packet, that the received packet is the response message.

The setting indicates that the packet type is an identifier for measuring a link performance parameter, and sets a special value indicating that the packet type is the request packet, where the sending node sends a request to the opposite node of the link to be measured. The message further includes:

The sending node carries the identifier and the special value in the request packet;

The peer node determines that the received packet is the request packet:

The peer node determines, according to the identifier and the special value in the received packet, that the received packet is the request packet;

The peer node carries the identifier in the response >text; The sending node determines that the received packet is the response packet: the sending node determines, according to the identifier in the received packet, that the received packet is the response packet.

The sending node and the peer node are resilient packet ring RPR nodes, and the request message and the response message are operations, management, and maintenance OMA messages.

A transmitting device for obtaining a link performance parameter, comprising: a communication interface module for transmitting a request message and receiving a response message carrying time information, the device further comprising:

a request message generating module, configured to generate a request message, and send the message through the communication interface module;

The identification module is configured to determine, according to the identifier in the packet received by the communication interface module, the packet type as a response packet, and send the response packet to the link performance parameter calculation module; the link performance parameter calculation module, Calculating link performance parameters according to the time information carried in the response message.

The request message generating module is further configured to acquire a time at which the request message is sent and carry the message in the request message;

a time at which the response packet carries the packet, and a time at which the peer node of the link to be measured receives the request packet and a time at which the response packet is sent;

The identifying module is further configured to acquire a time at which the response message is received;

The link performance parameter calculation module includes a transient transmission delay calculation sub-module, configured to calculate a link according to a time when the request message is sent, a time when the request message is received, a time when the response message is sent, and a time when the response message is received. Instantaneous transmission delay.

The request packet generating module is further configured to carry an identifier indicating that the packet type is the request packet in the request packet.

The request message generating module is further configured to generate check information according to a time when the request message is sent, and carry the check information in the request message. The sending message further includes: according to the time when the request message is sent, the time when the request message is received, and the check information generated by the time when the response message is sent, the sending device further includes:

a verification module, configured to check whether the verification information in the response packet sent to the link performance parameter calculation module is the time of sending the request message and the time of receiving the request message The time at which the response packet is sent is matched. If the match is sent, the response packet is sent to the link performance parameter calculation module, otherwise the response packet is discarded.

The transmitting device is an elastic packet ring RPR node.

A peer device for obtaining a link performance parameter, comprising: a communication interface module for receiving a request message, and sending a response message, the device further comprising:

The identification module is configured to determine, according to the identifier in the message received by the communication interface module, the message type as the request message, record the time when the request message is received, and send the request message to the response message generating module;

The response message generating module is configured to carry the time when the request message is received and the time when the response message is sent in the response message, and send the message through the communication interface module.

The response message generating module is further configured to generate verification information according to the time when the request message is received and the time when the response message is sent, and carry the verification information in the response message.

The response packet generating module is further configured to carry the identifier indicating that the packet type is the response packet in the response packet.

The request message carries a time when the request message is sent, and the response message generating module is further configured to carry the time of sending the request message in the response message.

The response message generating module is further configured to generate verification information according to the time when the request message is sent, the time when the request message is received, and the time when the response message is sent, and the verification information is carried in the response message. . The request message further carries the check information generated according to the time when the request message is sent, and the peer device further includes:

a check module, configured to check whether the check information in the request message sent to the response message generating module matches the time of sending the request message carried in the request message, and if yes, the response is The packet is sent to the response packet generation module, otherwise the request packet is discarded.

The peer device is an elastic packet ring RPR node.

A system for obtaining a link performance parameter, comprising: a transmitting device and a peer device, wherein the transmitting device includes a transmitting device communication interface module for transmitting a request message and receiving a response message carrying time information, and further comprising:

a request message generating module, configured to generate a request message, and send the message through the sending device communication interface module;

The identification module is configured to determine, according to the identifier in the message received by the communication interface module of the sending device, the message type as a response message, and send the response message to the link performance parameter calculation module;

a link performance parameter calculation module, configured to calculate a link performance parameter according to time information carried in the response packet;

The peer device includes a peer device communication interface module, configured to receive a request message, and send a response message, and further includes:

The identification module is configured to determine, according to the identifier in the packet received by the communication device module of the peer device, the packet type as the request packet, record the time when the request packet is received, and send the request packet to the response packet. Generating a module;

The response message generating module is configured to carry the time when the request message is received and the time when the response message is sent in the response message, and send the message through the peer device communication interface module.

As can be seen from the description of the above technical solutions, the present invention determines link performance parameters such as transmission. When delay and jitter are used, the processing time of the packet by the peer node of the link is fully considered. The peer node carries the receiving time of the receiving request message and the sending time of the sending response message in the response message, so that the sending node can conveniently determine the processing time of the packet by the peer node, and then in the computing chain. The road time delay takes into account the processing time. Further, by setting the check information in the request packet and the response packet, the time information is abnormal due to other factors in the transmission process, and the link performance parameter measurement is inaccurate. Therefore, the technical solution of the present invention improves the accuracy of link performance parameter measurement. BRIEF DESCRIPTION OF THE DRAWINGS

1 is a network structure diagram of Embodiment 1 of a method for obtaining a communication link performance parameter provided by the present invention;

2 is a flow chart of Embodiment 1 of a method for obtaining a communication link performance parameter according to the present invention;

3(a) and 3(b) are block diagrams of apparatus for obtaining communication link performance parameters provided by the present invention. Mode for carrying out the invention

The core of the present invention is: The sending node sends a request message to the opposite node of the link to be measured and records the sending time, and the time at which the peer node receives the request message and the time at which the response message is sent are carried in the response message. Sending to the sending node, the sending node records the time when the response message is received, and then determines the link performance parameter according to the above moments.

When transmitting the request message, the sending node of the present invention carries the first sending time of the sending request message in the request message; when the peer node of the link to be measured receives the request message, it will receive the request message. The first receiving time, the second sending time of the response message corresponding to the received request message, and the first sending time of the received request message are carried on In the response packet, returning to the sending node; when receiving the response message, the sending node records the second receiving time of receiving the response message, and obtains the corresponding first sending time from the information carried by the response message, The first receiving time and the second sending time.

Of course, the sending node may not carry the first sending time when transmitting the request message, but carry a unique message identifier, and correspondingly match the message identifier with the first sending time. The relationship is saved; when the peer node receives the request message, it will receive the first receiving time of the request message, send the second sending time of the response message corresponding to the received request message, and receive the received message. The packet identifier in the request packet is carried in the response packet and is returned to the sending node. When receiving the response packet, the sending node records the second receiving moment of receiving the response packet, and the slave packet carries the response packet. The corresponding first receiving time and the second sending time are obtained in the information, and the first sending time is determined according to the correspondence between the saved message representation and the first sending time.

The absolute value of the difference between the second transmission time and the first reception time is the processing time of the requesting message and the response message by the opposite end node. In this way, the absolute value of the difference between the second receiving moment of the transmitting node and the first sending moment is subtracted from the processing time of the opposite node, and the absolute value of the obtained difference is the instant of the sending node to the opposite node. Transmission delay.

The sending node continuously sends the request message. If the request message is sent according to the predetermined period, multiple response messages are received one after another. Multiple instantaneous transmission delays can be obtained by using the above method, and the average of multiple instantaneous transmission delays is adopted. The value of the method can determine the transmission delay of the link.

The difference between the two instantaneous transmission delays that are successively obtained is the instantaneous jitter of the link, and the jitter of the communication link can be determined by using the average of multiple instantaneous jitters.

In order to ensure the accuracy of the information such as the sending time and the receiving time carried in the request message and the response message, the present invention adds check information such as a checksum to the request message, and/or the response message. The verification information verifies each time information in the message. In this way, if the request message carries the check information, the peer node determines that the received message is received according to the check information. When the time information carried in the message is incorrect, the response message corresponding to the received request message may not be sent. If the response message carries the check information, the sending node does not determine the link information in the response packet when the time information carried in the response packet is incorrect according to the check information. The basis of the parameters.

The request message of the present invention, and/or the response message may also carry preset identification information, which is used to indicate that the purpose of the message is to measure link performance parameters, so as to facilitate receiving the node of the message. The packet is identified, and the corresponding processing process is performed. The identifier information of the request packet may be the same as or different from the identifier information of the response packet. The identification information of the foregoing packet can be implemented by setting a signature field in the packet, or by extending the packet type of the packet.

The sending node in the present invention may also determine the packet loss rate of the message communication link according to the number of request messages sent by the sending node and the number of received response messages.

The present invention will be further described in detail below with reference to the accompanying drawings. In the following embodiments, the technical solution provided by the present invention is specifically described for the Resilient Packet Ring (RPR) technology.

1 is a network structure diagram of Embodiment 1 of a method for obtaining a communication link performance parameter according to the present invention.

In Figure 1, the topological structure of the RPR ring network is a reciprocal double-loop structure. Each optical path on the ring works at the same rate. Two sub-rings in the RPR ring network can be transmitted. These two sub-rings are respectively called Outer ring and inner ring. The outer ring is transported clockwise and the inner ring is counterclockwise.

Please refer to FIG. 2. FIG. 2 is a flowchart of Embodiment 1 of a method for obtaining a communication link performance parameter according to the present invention. In this embodiment, the operation, management, and maintenance (OAM, Operations, Administration, and Maintenance) of the RPR protocol is used to implement the RPR. Statistics of link delay, jitter, and packet loss rate on the ring. In particular, the object of the present invention can be achieved by extending the Echo message of the OAM.

The contents related to the present invention in the Echo message are as shown in Table 1: Feature code eq_Time(A) Req_Time(B) Rsp_Time(B) Check information Table 1 where each field is 4 bytes in length. The feature code in the table-- is mainly used to distinguish the currently existing Echo message from the Echo message used to measure the link performance parameter in this embodiment. Req_Time(A) is used to carry the sending moment of the Echo packet sent by the sending node, that is, the first sending time; Req_Time(B) is used to carry the first receiving moment of the Echo packet received by the peer node; Rsp_Time(B) The sending moment at which the Echo packet is sent by the opposite end node, that is, the second sending moment. The check information is mainly used to check the time information carried in the Echo message, such as accumulating or performing CRC operations on the Req_Time(A), Req_Time(B), and Rsp_Time(B) fields, and verifying the information. It can guarantee the accuracy of the time information in the Echo message.

Step 201: The sending node sends an Echo packet.

The sending node carries the current time as the first sending time in Req_Time(A) of the Echo message.

The sending node also sets the signature and verification information in the Echo packet accordingly. In this embodiment, the feature code of the Echo message sent by the sending node is different from the feature code of the Echo message sent by the peer node, and is a first feature code and a second feature code, respectively.

The Echo packet sent by the sending node can be called a request packet.

The sending node may send Echo packets to all the nodes except the local node on the RPR ring, so as to obtain link performance parameters such as transmission delay and jitter of all nodes except the local node on the RPR ring. Step 202: The peer node receives the Echo packet.

When receiving the Echo message, the peer node records the current time as the first receiving time, and determines that the received message is on the network except itself according to the feature code of the received message. Request message sent by other nodes for measuring link performance parameters. The peer node also records the subring of the received Echo packet.

Step 203: The peer node checks the time information carried in the Echo packet according to the check information in the Echo packet. If the check is correct, go to step 204. Otherwise, discard the received Echo packet and end the current. Process.

Step 204: The peer node returns the Echo packet to the sending node.

The peer node carries the first receiving time recorded in step 202 in the Req_Time (B) field of the received Echo message; and when the Echo message is returned to the sending node, the current time is sent as the second sending. The time is carried in Rsp_Time(B); at the same time, the check information in the Echo message is reset according to Req_Time(A), Req_Time(B) and Rsp_Time(B); the peer node is set and the sent Echo is set. The feature code of the message is the second feature code.

The Echo packet sent by the peer node can be called a response packet. In this step, the peer node returns Echo in the RPR ring network on another subring different from the subring recorded in step 202.

Step 205: The sending node receives the Echo packet, records the current time, and determines, according to the feature code of the received packet, that the received packet is an Echo packet sent by the sending node to measure the link performance parameter. Response message. The transmitting node takes the recorded time as the second receiving time Rsp_Time(A).

The sending node verifies the time information carried in the Echo packet according to the check information in the Echo packet, and obtains Req_Time(A), Req_Time(B), and Rsp_Time from the Echo packet when determining that the check is correct. B) „

Step 206: The sending node calculates, according to the received and recorded time information, from itself to the pair. The instantaneous transmission delay of the terminal.

The instantaneous transmission delay represents an instantaneous transmission delay of a link from a transmitting node to a correspondent node to a transmitting node, and the calculation formula is:

(Rsp_Time(A) - Req_Time(A)) - (Rsp_Time(B) - Req_Time(B)) ₀ Since the packet in the RPR network carries the source address and the destination address, the sending node can receive it according to The source address in the Echo message determines which node is instantaneously transmitted to the network based on the above formula.

The transmitting node can obtain multiple instantaneous transmission delays according to the above method, and the average value of the multiple instantaneous transmission delays can be used as the transmission delay of the link from the transmitting node to the opposite node to the transmitting node.

The difference between the two instantaneous transmission delays obtained in sequence is the instantaneous jitter of the link from the transmitting node to the opposite node to the transmitting node, and the average value of the multiple instantaneous jitters can be used as the sending node to the opposite node. The jitter of the link of the sending node.

In step 201, the sending node may count the number of request messages sent to the specific peer node within a certain period of time; in step 205, the sending node may count that the check received from the specific peer node is correct. The number of response messages; the sending node determines the difference between the number of transmissions and the number of received, and compares the ratio of the difference to the number of transmissions as the link from the transmitting node to the opposite node to the transmitting node during this time. Packet loss rate.

In step 203, when the peer node checks the time information carried in the request message according to the check information in the request message, if the check is incorrect, the received request message is discarded. At this time, the sending node does not receive the response message from the correspondent node. However, the transmitting node calculates the transmission delay and jitter according to the time information carried in the response packet after receiving the response packet. Therefore, the sending node does not need to care whether the peer node discards the request packet. .

In the calculation of the packet loss rate, since the sending node calculates the packet loss rate, it is based on the data. The number of packets sent in a period of time and the number of response packets received and verified correctly are calculated. Therefore, the sending node does not need to care whether the peer node discards the request. The situation of the message.

Of course, it is also possible to preset a maximum transmission delay according to the average of the network. After receiving the response packet, the transmitting node discards the response packet if it finds that the calculated instantaneous transmission delay exceeds the maximum transmission delay. In addition, as described above, in the process of measuring the packet loss rate, the transmitting node needs to send a series of request messages to the opposite node. After the last request message in the series of request messages is sent to the peer node, it needs to wait for a period of time for statistics and calculation. This wait time can be set according to the maximum transmission delay.

In the above embodiment, the signatures of the request message and the response message are different. As an alternative, the signature of the request message and the response message can be made the same. When sending the Echo packet, the sending node sets Req_Time(B), and/or Rsp_Time(B) in the packet to a special value set in advance, for example, the value of all the binary bits is 1. When receiving an Echo packet, the node distinguishes whether the received Echo packet type is a request packet or a response packet according to whether the Req_Time(B), and/or Rsp_Time(B) is a preset special value. .

In this embodiment, the format of the request message and the response message are the same. As an alternative, the message format of the request message and the response message may be different. For example, the request message does not set Req_Time (B) and Rsp_Time (B), and only the response message sets the two data fields. In this case, if the signatures of the request packet and the response packet are the same, the node can determine whether the received Echo packet is a request packet or a response packet according to whether the two data fields are set.

Please refer to FIG. 3. FIG. 3 is a block diagram of an apparatus for obtaining performance parameters of a communication link provided by the present invention. In Fig. 3, Fig. 3(a) is a block diagram of the transmitting node, and Fig. 3(b) is a block diagram of the opposite node.

The sending node shown in Figure 3 (a) includes a request message generating module, a communication interface module, Identification module, verification module, packet loss rate calculation module, transmission delay and jitter calculation module. The request message generating module is configured to generate a request message, and notify the packet loss rate calculation module to perform counting. The generating the request message includes the first sending time of the sending request message and the feature code and the check information of the setting request message in the request message. If the request message and the response message have the same format and use the same feature code, the request message generation module further needs to set the first receiving time in the request message, and/or the second sending time is a preset special value.

The communication interface module is configured to send a request message generated by the request message generating module, receive the response message, and send the response message to the identification module for processing.

An identification module, configured to determine that the received message is the response message, and record the time when the response message is received; then send the response message to the verification module; and calculate the module according to the transmission delay and jitter The request, to which the recorded time of receipt of the response message is sent.

The verification module is configured to check the response packet according to the verification information in the response packet sent by the identification module, and if the verification succeeds, send the response packet to the transmission delay and jitter calculation module, and notify the lost The packet rate calculation module counts, otherwise the response message is discarded. This module is optional.

The link performance parameter calculation module includes a transient transmission delay calculation submodule, a transmission delay calculation submodule, and a jitter calculation submodule. The instantaneous transmission delay calculation sub-module is configured to: when receiving the response message sent by the verification module, acquire the time at which the response message is received from the identification module, and the time information carried in the response message The instantaneous transmission delay is calculated together. The transmission delay calculation sub-module and the jitter calculation sub-module are used to calculate transmission delay and jitter according to a plurality of instantaneous transmission delays obtained by the instantaneous transmission delay calculation module, and the two sub-modules are optional.

The packet loss rate calculation module is configured to calculate a packet loss rate according to the request packet sending module and the check module, and calculate a packet loss rate according to the counting result. This module is optional. The peer node shown in FIG. 3(b) includes a communication interface module, an identification module, a verification module, and a response message generation module.

a communication interface module, configured to receive a request message and send it to the identification module for processing, and send a response message generated by the response message generating module,

The identification module is configured to determine that the received message is the request message, and record the time when the request message is received; then send the request message to the verification module; and generate a request according to the response message , to which the recorded time of receipt of the request message is sent.

The verification module is configured to check the request message according to the verification information in the request message sent by the identification module, and send the request message to the response message generation module for processing if the verification is passed, otherwise discarding the Request a message.

The response message generating module is configured to generate a response message. The generating the response message includes: carrying the second sending time of the sending response message in the response message, and carrying the time of receiving the request message obtained by the identifying module in the response message, and setting the feature of the response message Code and check information.

It should be noted that the technical solution provided by the present invention is mainly applied to an RPR network, but is not limited to being applied to an RPR network.

The above described specific embodiments of the present invention are described in detail, and are not intended to limit the present invention. Any modifications, equivalent substitutions, 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 obtaining link performance parameters, characterized in that the method comprises the following steps:

Determining, by the peer node, that the received packet is the request packet, and returning, to the sending node, a response packet carrying the time information, where the time information includes the time of receiving the request message as the first receiving time, and The time of transmitting the response message as the second transmission time;

The method for obtaining a link performance parameter according to claim 1, wherein the sending node calculates the processing time of the peer node according to the time information carried in the response message, including:

The method for obtaining a link performance parameter according to claim 2, wherein the sending node sends a request message to the opposite node of the link to be measured:

The sending node carries the sending time of the request message as the first sending time in the request message and sends it to the opposite node;

The first sending moment extracted from the request packet is carried in the response packet; The calculating, by the sending node, the link performance parameter according to the time of sending the request message, the time of receiving the response, and the processing time, includes:

The sending node records the time when the response message is received as the second receiving time;

The method for obtaining a link performance parameter according to claim 2, wherein the method further comprises: when the peer node returns a response message carrying the time information to the sending node:

The sending node checks whether the first receiving time and the second sending time match the check information. If the matching, the processing time of the opposite node is calculated according to the time information carried in the response message, otherwise the response message is discarded. End the current process.

The method for obtaining a link performance parameter according to claim 3, wherein the method further includes: when the sending node sends the request message to the opposite node of the link to be measured:

The method for obtaining a link performance parameter according to claim 3, wherein the method further forwards when the opposite node returns a response message carrying the time information to the sending node. Includes:

Checking whether the first sending time, the first receiving time, and the second sending time match the check information, and if yes, calculating the processing time of the opposite node according to the time information carried in the response message, otherwise discarding the The response ^ = 艮 text and end the current process.

The method for obtaining a link performance parameter according to claim 1, wherein: setting a first identifier indicating that the packet type is the request packet, and indicating that the packet type is the response packet The second identifier, the method further includes: when the sending node sends the request packet to the opposite node of the link to be measured:

The sending node carries the first identifier in the request packet;

Then, the peer node determines that the received packet is the request packet:

The peer node carries the second identifier in the response packet;

The sending node determines that the received packet is the response packet:

The method for obtaining a link performance parameter according to claim 1, wherein the identifier is set to be an identifier for measuring a link performance parameter, and the packet type is set to be the request packet. The special value, the method further includes: when the sending node sends the request message to the opposite node of the link to be measured: The sending node carries the identifier and the special value in the request packet; the peer node determines that the received packet is the request packet:

The peer node carries the identifier in the response packet;

The sending node determines that the received packet is the response packet:

The sending node determines, according to the identifier in the received message, that the received message is the response message.

The method for obtaining a link performance parameter according to claim 1, wherein the sending node and the peer node are resilient packet ring RPR nodes, and the request packet and the response packet are running, managing, and Maintain OMA messages.

A device for transmitting a link performance parameter, comprising: a communication interface module for transmitting a request message and receiving a response message carrying time information, wherein the device further comprises:

The identification module is configured to determine, according to the identifier in the message received by the communication interface module, the message type as a response message, and send the response message to the link performance parameter calculation module;

The link performance parameter calculation module is configured to calculate a link performance parameter according to the time information carried in the response packet.

The device for transmitting a link performance parameter according to claim 10, wherein the request message generating module is further configured to acquire a time at which the request message is sent and carry the message in the request message; The time at which the response packet carries the request packet, and the time at which the peer node of the link to be measured receives the request packet and the time at which the response packet is sent;

The device for transmitting a link performance parameter according to claim 10, wherein the request message generating module is further configured to carry an identifier indicating that the message type is the request message in the request In the message.

The device for transmitting link performance parameters according to claim 11, wherein the request message generating module is further configured to generate check information according to a time when the request message is sent, and carry the check information. In the request message.

The device for transmitting a link performance parameter according to claim 11, wherein the response message further carries a time according to the time of transmitting the clearing message, a time of receiving the request message, and a message for transmitting the response message. The verification information generated at a time, the sending device further includes:

15. The apparatus for transmitting link performance parameters according to claim 10, wherein the transmitting apparatus is an elastic packet ring RPR node.

A peer device for obtaining a link performance parameter, comprising: a communication interface module for receiving a request message and transmitting a response message, wherein the device further comprises: an identification module, configured to use the communication interface The identification judgment report in the message received by the module The text type is a request message, and records the time when the request message is received, and sends the request message to the response message generating module;

The peer device for obtaining the link performance parameter according to claim 16, wherein the response message generating module is further configured to generate a school according to the time when the request message is received and the time when the response message is sent. Verify the information and carry the verification information in the response message.

The device for transmitting a link performance parameter according to claim 16, wherein the response message generating module is further configured to carry an identifier indicating that the message type is the response message in the response In the message.

The device for obtaining a link performance parameter according to claim 16, wherein the request message carries a time at which a request message is sent, and the response message generating module is further configured to send the message The time at which the message is requested is carried in the response message.

The device for obtaining a link performance parameter according to claim 19, wherein the response message generating module is further configured to: according to a time when the request message is sent, a time when the request message is received, and a sending The verification information is generated at the time of responding to the message, and the verification information is carried in the response message.

The peer device for obtaining the link performance parameter according to claim 19, wherein the request message further carries the verification information generated according to the time when the request message is sent, and the peer device further includes :

22. The peer device for obtaining link performance parameters according to claim 16, characterized in that The peer device is an elastic packet ring RPR node.

A system for obtaining link performance parameters, including a transmitting device and a peer device, wherein the transmitting device includes a transmitting device communication interface module for transmitting a request message and receiving a response message carrying time information. , further including:

The identification module is configured to determine, according to the identifier in the packet received by the communication device module of the peer device, the message type as the request message, and record the time when the request is received, and send the request message to the response. Message generation module;