WO2012003745A1

WO2012003745A1 - Method and system for initiating a counter in packet loss rate measurement

Info

Publication number: WO2012003745A1
Application number: PCT/CN2011/074537
Authority: WO
Inventors: 肖敏
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-07-05
Filing date: 2011-05-23
Publication date: 2012-01-12
Also published as: CN102315980B; CN102315980A

Abstract

The present invention discloses a method for initiating a counter in packet loss rate measurement. The method includes the following steps: after initiating a counter for the Class of Service (CoS) contraposed by the present packet loss rate measurement, an initiator Maintenance End Point (MEP) sends a request message for initiating a counter to an opposite end MEP; after receiving the request message for initiating the counter, the opposite end MEP initiates the corresponding counter, and returns a response message for initiating the counter to the initiator MEP. The present invention also discloses a system for initiating a counter in packet loss rate measurement accordingly. The present invention can initiate the counter on the opposite end MEP of packet loss rate measurement, and does not need to configure the opposite end MEP as another initiator MEP, so that the unnecessary configuration on the opposite end MEP can be avoided and the operation is simplified. The present invention can save human resources by initiating the corresponding counter with a data module or a control module.

Description

Method and system for starting counter in packet loss rate measurement

The present invention relates to a packet loss rate measurement technique, and more particularly to a method and system for starting a counter in a packet loss rate measurement. Background technique

In the current various packet-switched communication networks, the support of the operation, administration, and maintenance (OAM) functions of communication devices is increasingly valued by network operators for various 0AM functional requirements. Technical implementation solutions are also emerging. The packet loss rate measurement function is one of the 0AM functional requirements. The standard organization International Telecommunication Union-Telecommunication

The Standardization Sector (ITU-T) proposed a technical implementation scheme for the packet loss rate measurement function in Ethernet in the Y.1731 standard released in February 2008.

The Internet Engineering Task Force (IETF), a standard organization, is advancing the technical implementation of the packet loss rate measurement function in the Multi-Protocol Label Switching-Transport Profile (MPLS-TP) network. The technical solutions in the ITU-T Y.1731 standard are consistent, and the two are only different for the packet network of the application.

The following is a detailed description of the prior art implementation of the packet loss rate measurement function in the packet network. FIG. 1 is a schematic diagram of the functional entity in the packet network. As shown in FIG. 1 , the provider edge device (Provider Edge, located at the edge of the packet network, PE) can create one or more maintenance end nodes ( Maintenance End Point, ΜΕΡ) based on the port. One or more maintenance can be created based on the port on the provider intermediate device ( Provider Device, P ) located in the middle of the packet network. Maintenance Intermediate Point (MIP). In the OAM functional requirements of the packet network, it is explicitly required that the packet loss rate measurement function can be performed between the MEP and the MEP, and the packet loss rate measurement function measures for a predetermined Class of Service (CoS). The packet loss rate is as follows:

Step 1: Start the counter for a certain CoS at the initiator MEP of the packet loss rate measurement (referred to as MEP1 in the subsequent step). The method of starting the counter may be management module configuration or control module configuration, and the counter will accumulate records after startup. The number of all transmission and reception packets belonging to the CoS on the MEP.

Here, the CoS identification method differs for different packet networks. For example, a specific service level in Ethernet is identified by a Priority Code Point (PCP) field in the Ethernet frame header, in MPLS- The specific level of service in the TP network is identified by the Per-Hop Behavior (PHB) field in the packet MPLS label.

Step 2: In the peer MEP of the packet loss rate measurement (referred to as MEP2 in the subsequent step), start the counter for a certain CoS. The method of starting the counter may be management module configuration or control module configuration, counter function and CoS identification method. Same as described in the first step, but the CoS here cannot be chosen at will, but must be consistent with the CoS selected in the first step.

The third step: MEP1 sends a packet loss rate measurement request message to the MEP2 through the data module, and carries the number of packets T1 recorded by the counter on the MEP1 at the request message sending time.

Step 4: After receiving the packet loss rate measurement request message sent by the MEP1, the data module sends a packet loss rate measurement reply message to the MEP1, which carries the received T1 and the counter recorded on the request message receiving time ΜΕΡ2. The number of packets received by the counter on the number of packets R1 and the reply message transmission time ΜΕΡ2 is Τ2, and the number of packets recorded by the counter on the MEP1 is R2 when the packet loss rate measurement reply message is received.

Step 5: After a predetermined fixed period, the MEP1 sends a second packet loss rate measurement request message to the MEP2, carrying the number of packets T3 recorded by the counter on the MEP1 at the request message sending time. Step 6: After receiving the packet loss rate measurement request message sent by the MEP1, the MEP2 sends a packet loss rate measurement reply message to the MEP1, carrying the received T3, the number of packets recorded by the counter on the request message receiving time ΜΕΡ2 R3, and the number of packets T4 recorded by the counter on the MEP2 at the time of the reply message transmission, when the packet loss rate measurement reply message is received, the number of packets recorded by the counter on the MEP1 is R4.

After that, MEP1 can calculate the packet loss rate in the two directions during the time period by using the difference between the number of previously received and received packets. The calculation formula is as follows:

Packet loss rate from MEP1 to MEP2 = ((T3-T1)-(R3-R1)) I (T3-T1)

The packet loss rate of MEP2 to MEP1 = ((T4-T2)-(R4-R2)) / (T4-T2) The above calculation result is only the packet loss rate during this time period, and the actual packet loss rate measurement function is used. There are two modes to choose from: Proactive measurement and On-demand measurement; where active measurement refers to continuously repeating the process described in the third and subsequent steps above, obtaining continuous The packet loss rate measurement result completes the continuous monitoring of a CoS service on the tested communication link; the on-demand measurement refers to setting the number of measurements before the measurement starts, repeating the third step in a certain period of time and After the process described in the following steps, a certain number of packet loss rate measurement results are obtained, and phase monitoring of a CoS service on the tested communication link is completed.

It should be noted that in the prior art, the counter MEP startup counter measured by the control plane at the packet loss rate is performed by using Resource Reservation Protocol (TRAM) (RSVP-TE) with traffic engineering. Expanded to achieve, it can only be applied to active packet loss rate measurement, can not be applied to on-demand packet loss rate measurement, and the existing solution is to automatically follow the same configuration parameters for the MEPs at both ends of the tested communication link. The initiator MEP is configured as a packet loss rate measurement to achieve the purpose of simultaneously starting a counter for a certain CoS at both ends of the MEP. In the prior art, the counter is started by the peer MEP of the packet loss rate measured by the management plane. It can be applied to both active packet loss rate measurement and on-demand packet loss rate measurement.

The existing packet loss rate measurement technology is respectively initiated at the initiator MEP of the packet loss rate measurement and the peer MEP. The counter for a CoS is required, and the CoS for which the counter started by the peer MEP is required must be the same as the CoS for the counter started by the initiator MEP. If the counter MEP does not start the counter at the packet loss rate measurement, the packet loss rate measurement cannot be completed; if the counter that the peer MEP starts at the packet loss rate measurement is for the CoS and the counter that is started at the initiator MEP, If the CoS is inconsistent, the wrong packet loss rate measurement result will be obtained.

In summary, when the active packet loss rate is measured, the peer MEP is used to start the counter at the peer MEP. The management plane configuration or control plane configuration is required on the peer MEP. The CoS that is manually guaranteed by the configuration personnel to ensure that the started counter is synchronized with the CoS that is started by the MEP at the originating end; if configured through the control plane, the CoS and the counter for which the counter is automatically guaranteed by the RSVP-TE protocol The CoS that the counter that the initiator MEP starts is directed to.

However, the existing solution automatically configures the peer MEP as another initiator MEP through the RSVP-TE protocol, and needs to configure more parameters, and another independent packet loss rate measurement process is started, so the implementation process is cumbersome. Moreover, when the on-demand packet loss rate measurement is performed, the counter of the MEP is started at the opposite end of the packet loss rate measurement by the prior art solution, and the management plane configuration of the peer MEP is required, and the counter is manually guaranteed by the configuration personnel. The CoS that is targeted is consistent with the CoS targeted by the counter launched by the MEP at the originating end, which requires a certain amount of human resources. Summary of the invention

In view of this, the main object of the present invention is to provide a method and system for starting a counter in a packet loss rate measurement, which can simplify operation and save human resources.

In order to achieve the above object, the technical solution of the present invention is achieved as follows:

A method for starting a counter in a packet loss rate measurement, comprising:

The initiator maintenance node MEP starts a counter for the service level CoS for which the current packet loss rate is measured, and sends a start counter request message to the peer MEP.

After receiving the start counter request message, the peer MEP starts a corresponding counter. And returning a start counter reply message to the originating MEP.

The start counter request message carries at least the CoS for which the current packet loss rate measurement is performed; the corresponding counter of the peer MEP starts to: start the CoS for the current packet loss rate measurement carried by the start counter request message Counter

The start counter reply message carries at least an indication of whether the peer MEP is successful for the CoS start counter for the current packet loss rate measurement.

Before the initiator MEP starts the counter for the CoS for the current packet loss rate measurement, the method further includes: the initiator MEP performs the packet loss rate measurement configuration,

When configured as the active packet loss rate measurement, the packet loss rate measurement configuration parameters include: The transmission period of the CoS and packet loss rate measurement messages for the current packet loss rate measurement;

When configured as an on-demand packet loss rate measurement, the packet loss rate measurement configuration parameters include: CoS, the transmission period of the packet loss rate measurement message, and the number of times the packet loss rate measurement message is sent.

The initiator MEP sends a start counter request message to the peer MEP as follows:

When the initiator MEP performs the active packet loss rate measurement, the data module or the control module sends a start counter request message to the peer MEP. When the initiator MEP performs the on-demand packet loss rate measurement, the data module sends the start to the peer MEP. Counter request message.

After receiving the start counter request message, the peer MEP starts a corresponding counter, and returns a start counter reply message to the initiator MEP as:

For the initiator counter request message sent by the originating MEP through the data module or the control module, the peer MEP receives the corresponding data module or the control module, and starts the corresponding counter, and then returns a startup counter reply to the initiator MEP. Message.

After the peer MEP returns a start counter reply message to the initiator MEP, the method further includes:

The startup counter reply message indicates that the startup counter is successful, and the initiator MEP loses. Packet rate measurement; The start counter reply message indicates that the start counter fails, and the initiator MEP terminates the packet loss rate measurement and returns an error prompt.

A system for starting a counter in a packet loss rate measurement, comprising: an initiator MEP and a peer MEP; wherein

The initiator MEP is configured to send a start counter request message to the peer MEP after starting the counter for the service level CoS for the current packet loss rate measurement;

The peer MEP is configured to start a corresponding counter after receiving a start counter request message from the initiator MEP, and return a start counter reply message to the initiator MEP.

The start counter request message sent by the initiator MEP to the peer MEP carries at least the CoS for which the current packet loss rate measurement is performed;

The peer MEP starts a corresponding counter as: a counter for initiating a CoS for the current packet loss rate measurement carried by the startup counter request message;

The start counter reply message returned by the peer MEP to the initiator MEP carries at least an indication of whether the peer MEP is successful for the CoS start counter for which the current packet loss rate measurement is performed.

The initiating MEP is further configured to perform a packet loss rate measurement configuration. When the initiating MEP is configured as an active packet loss rate measurement, the packet loss rate measurement configuration parameter includes: the CoS and the target of the packet loss rate measurement. Packet loss rate measurement message transmission period; when the initiator MEP is configured to measure the on-demand packet loss rate, the packet loss rate measurement configuration parameters include: CoS and packet loss rate measurement messages for the current packet loss rate measurement The number of times the transmission period and the packet loss rate measurement message are sent.

The initiator MEP includes a data module and a control module, and the peer MEP includes a data module and a control module, and the initiator MEP sends a start counter request message to the peer MEP as follows:

When the initiator MEP performs the active packet loss rate measurement, the data module or the control module sends a start counter request message to the peer MEP; the initiator MEP performs the on-demand packet loss rate. During measurement, a start counter request message is sent to the peer MEP through the data module therein.

For the initiator counter request message sent by the initiator MEP through its data module or control module, the peer MEP receives the data through its corresponding data module or control module, and starts the corresponding counter, and then returns to the initiator MEP to start. The counter replies to the message.

The initiator MEP is further configured to: when the start counter reply message indicates that the start counter is successful, perform a packet loss rate measurement; and when the start counter reply message indicates that the start counter fails, terminate the packet loss rate measurement, and return an error prompt.

The method and system for starting a counter in the packet loss rate measurement of the present invention, after the MEP is configured with the packet loss rate measurement function at the initiating end of the packet loss rate measurement, the initiating MEP sends a start counter request message to the peer MEP through the data module or the control module. Carrying the service level for the packet loss rate measurement configured on the initiating MEP, the peer MEP is required to start a counter for the service level; after receiving the start counter request message, the peer MEP starts through the data module or the control module. Corresponding counters, and send a start counter reply message to the originating MEP, indicating that the counter is successfully or failed to start the service level. The invention can start the counter on the peer MEP of the packet loss rate measurement, and does not need to configure the peer MEP as another initiator MEP, thereby avoiding unnecessary configuration on the peer MEP and simplifying operation; The invention can save human resources by starting the corresponding counter through the data module or the control module. DRAWINGS

Figure 1 is a schematic diagram of an OAM functional entity in a packet network;

2 is a schematic flow chart of a method for starting a counter in a packet loss rate measurement according to the present invention;

3 is a schematic flowchart of a packet loss rate measurement according to Embodiment 1 of the present invention;

FIG. 4 is a schematic flowchart of packet loss rate measurement according to Embodiment 2 of the present invention. detailed description

The technical problem to be solved by the present invention is to provide a method for starting a counter on a peer MEP in a packet network packet loss rate measurement function based on an OAM function entity, and overcoming the prior art scheme using a management module or a control module to configure the peer MEP. The problem exists, and some unnecessary configurations in the prior art solution are omitted, including all configurations performed on the peer MEP through the management module configuration, and another initiation on the peer MEP when configured by the control module. The MEP configuration fails to prevent the packet loss rate measurement failure caused by the inconsistency between the configuration of the CoS parameters on the initiating MEP and the peer MEP.

The basic idea of the present invention is: After the packet loss rate measurement function is configured on the MEP of the initiator of the packet loss rate measurement, the initiating MEP sends a start counter request message to the peer MEP through the data module or the control module, and carries the configuration on the MEP of the initiator. The service level for the packet loss rate measurement requires the peer MEP to start a counter for the service level; after receiving the start counter request message, the peer MEP starts the corresponding counter through the data module or the control module, and initiates The MEP sends a Start Counter Reply message indicating that the counter was successfully or failed for the service level.

2 is a schematic flowchart of a method for starting a counter in a packet loss rate measurement according to the present invention. As shown in FIG. 2, the method includes:

Step 201: The initiator MEP starts the counting of the CoS for the current packet loss rate measurement.

Here, the initiator MEP starts the counter for the CoS for the current packet loss rate measurement, and implements the packet loss rate measurement function at the initiator MEP, and initiates the packet loss rate measurement before the packet loss rate measurement function is started. The MEP also needs to send the packet loss rate measurement configuration parameters through the management module or the control module.

The packet loss rate measurement is one of the packet network OAM functions. It can be configured as active or on-demand. If the active packet loss rate measurement is configured, the packet loss rate measurement configuration parameters include: The transmission period of the CoS and packet loss rate measurement messages for the second packet loss rate measurement; if configured as the on-demand packet loss rate measurement, in addition to the above parameters, the packet loss rate measurement configuration parameter also includes the number of times the packet loss rate measurement message is sent. .

Step 202: The initiator MEP sends a start counter request message to the peer MEP, where the start counter request message carries at least the CoS for which the current packet loss rate measurement is performed.

Here, the initiating MEP sends a start counter request message to the peer MEP through the data module or the control module. If the active packet loss rate is measured, the initiating MEP may send a start counter request message to the peer MEP through the data module or the control module. If it is an on-demand packet loss rate measurement, the initiator MEP can only send a start counter request message to the peer MEP through the data module.

The start counter request message carries at least the CoS for which the current packet loss rate measurement is performed, and the purpose is to require the peer MEP to start a counter for the CoS.

Step 203: After receiving the start counter request message, the peer MEP starts a counter for the CoS for which the current packet loss rate measurement is carried in the start counter request message.

Step 204: The peer MEP returns a start counter reply message to the initiator MEP, where the start counter reply message carries at least an indication of whether the peer MEP is successful for the CoS start counter for the current packet loss rate measurement.

Here, the peer MEP replies to the start counter reply message by using the data module or the control module. Specifically, if the start counter request message is received through the data module, the peer MEP replies through the data module; if it is received through the control module The counter requests the message, and the peer MEP replies through the control module. For the message sent by the initiator MEP through the data module/control module, the peer MEP also needs to receive and execute through the corresponding data module/control module.

The start counter reply message carries at least an indication of whether the peer MEP is successful for the CoS start counter for which the current packet loss rate measurement is performed, and if it is an indication that the counter is successful, the initiator end After receiving the indication, the MEP will continue the process of measuring the packet loss rate according to the prior art; if it is the indication that the counter is failed, the initiator MEP will terminate the packet loss rate measurement process after receiving the indication, and return an error message. .

The present invention also provides a system for starting a counter in a packet loss rate measurement, the system comprising: an originating MEP and a peer MEP; wherein

When the initiator MEP performs active packet loss rate measurement, it passes the data module or control module. The block sends a start counter request message to the peer MEP. When the initiator MEP performs the on-demand packet loss rate measurement, the data module sends a start counter request message to the peer MEP.

The implementation of the technical solution will be further described in detail below with reference to the accompanying drawings.

Example 1

In this embodiment, the counter is started on the peer MEP of the packet loss rate measurement through the data plane. FIG. 3 is a schematic flowchart of packet loss rate measurement according to Embodiment 1 of the present invention. As shown in FIG. 3, the method for measuring packet loss rate in Embodiment 1 includes the following steps:

Step 301: The initiator of the packet loss rate measurement MEP configures and starts the active or on-demand packet loss rate measurement function, which can be completed by the management module or the control module.

If it is an active measurement, the parameters to be configured include the transmission period of the CoS and packet loss rate measurement messages for the packet loss rate measurement. If the measurement is on-demand, in addition to the above parameters, you need to configure the transmission of the packet loss rate measurement message. frequency.

Step 302: After the configuration on the initiating MEP is completed, the MEP sends a start counter request OAM message to the peer MEP through the data module, and carries the CoS for the packet loss rate measurement configured on the initiating MEP, and requires the peer end. The MEP starts a counter for the CoS.

Step 303: After receiving the start counter request OAM message, the peer MEP starts a counter for the CoS carried in the message, and returns a start counter to reply OAM through the data module. A message indicating whether the startup counter was successful or not.

In this embodiment, the start counter replies with an OAM message indicating that the start counter is successful.

Step 304: After receiving the start counter reply message indicating success, the originating MEP sends a packet loss rate measurement request message to the peer MEP according to the existing ITU-T Y.1731 standard or the IETF standard draft, and carries the request message sending time. The number of packets T1 recorded by the counter on the initiator MEP.

Step 305: After receiving the packet loss rate measurement request message, the peer end immediately responds to the packet loss rate measurement reply message, and carries the received T1 and the number of packets recorded by the counter on the opposite end of the request message receiving time. And the number of packets T2 recorded by the counter on the peer MEP at the time of sending the reply message. When receiving the packet loss rate measurement reply message, the number of packets recorded by the counter on the originating MEP is R2.

Step 306: After the sending period of the packet loss rate measurement message configured in step 301, the initiating MEP sends a second packet loss rate measurement request message to the peer MEP, and carries the request message to send the counter on the MEP at the originating end. The number of packets sent is T3.

Step 307: After receiving the packet loss rate measurement request message, the peer end immediately responds to the packet loss rate measurement reply message, and carries the received packet number R3 recorded by the counter on the peer end of the request message receiving time. And the number of packets T4 recorded by the counter on the peer MEP at the time of sending the reply message. When the packet loss rate measurement reply message is received, the number of packets recorded by the counter on the originating MEP is R4.

Step 308: After receiving the packet loss rate measurement reply message, the MEP uses the difference between the number of previously received and received packets to calculate the packet loss rate in the two directions during the time period.

Here, the packet loss rate is calculated as follows:

Packet loss rate from the originating end to the opposite end = ((T3 -T 1 )-(R3 -R 1 )) / (T3 -T 1 )

Packet loss rate from the peer to the initiator = ((T4-T2)-(R4-R2)) I (T4-T2)

It should be noted that the above calculation result is only the packet loss rate during this time period. After step 308, steps 306-308 are repeatedly performed periodically. If it is an active measurement, the number of repetitions is infinite. If it is an on-demand measurement, the number of repetitions is the number of times the packet loss rate measurement message is configured in step 301. Decide. Example 2

In this embodiment, the counter is started on the opposite MEP of the packet loss rate measurement by the control plane. 4 is a schematic flowchart of packet loss rate measurement according to Embodiment 2 of the present invention. As shown in FIG. 4, the method for measuring packet loss rate in Embodiment 2 includes the following steps:

Step 401: The MEP of the initiator of the packet loss rate measurement is configured and the active packet loss rate measurement function is started. The configuration may be performed by the management module or the control module, and the parameters to be configured include the CoS and the packet loss for the packet loss rate measurement. Rate measurement period of the message.

Step 402: After the configuration on the initiating MEP is completed, the control module sends a start counter request message to the peer MEP, and the message may be extended by the existing RSVP-TE protocol message, and the time configured on the initiating MEP is carried. The CoS for the packet loss rate measurement requires the peer MEP to start the counter for the CoS.

Step 403: After receiving the start counter request message, the peer MEP starts a counter for the CoS carried in the message, and replies to the start counter reply message by using the control module, and the message may be extended by the existing RSVP-TE protocol message. Comes, indicating whether the startup counter is successful or not.

In this embodiment, the start counter reply message indicates that the start counter is successful.

Step 404: After receiving the start counter reply message indicating success, the initiator MEP sends a packet loss rate measurement request message to the peer MEP according to the existing ITU-T Y.1731 standard or the IETF standard draft, and carries the request message sending time. The number of packets T1 recorded by the counter on the initiator MEP.

Step 405: After receiving the packet loss rate measurement request message, the peer end immediately responds to the packet loss rate measurement reply message, and carries the received T1, the number of the received packets recorded by the counter on the opposite end of the request message receiving time. And the counter on the opposite MEP at the time the reply message is sent The number of received packets T2, when the packet loss rate measurement reply message is received, the number of packets recorded by the counter on the originating terminal is R2.

Step 406: After the sending period of the packet loss rate measurement message configured in step 401, the initiating MEP sends a second packet loss rate measurement request message to the peer MEP, and carries the request message to send the counter on the MEP at the originating end. The number of packets sent is T3.

Step 407: After receiving the packet loss rate measurement request message, the peer end immediately responds to the packet loss rate measurement reply message, and carries the received packet number R3 recorded by the counter on the peer end of the request message receiving time. And the number of packets T4 recorded by the counter on the peer MEP at the time of sending the reply message. When the packet loss rate measurement reply message is received, the number of packets recorded by the counter on the originating MEP is R4.

Step 408: After receiving the packet loss rate measurement reply message, the MEP uses the difference between the number of previously received and received packets to calculate the packet loss rate in the two directions during the time period.

The specific calculation formula is as follows:

Packet loss rate from the peer to the initiator = ((T4-T2)-(R4-R2)) I (T4-T2)

It should be noted that the above calculation result is only the packet loss rate during this time period.

After step 408, steps 406-408 are repeatedly performed periodically, and since it is an active measurement, the number of repetitions is infinite.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Claims

Claim

A method for starting a counter in a packet loss rate measurement, the method comprising: the initiating end maintenance node MEP initiating a service level for the current packet loss rate measurement

After the counter of the CoS, sending a start counter request message to the peer MEP;

After receiving the start counter request message, the peer MEP starts a corresponding counter, and returns a start counter reply message to the initiator MEP.

The method for starting a counter in the packet loss rate measurement according to claim 1, wherein the start counter request message carries at least a CoS for which the current packet loss rate measurement is performed; and the peer MEP starts corresponding The counter is: a counter for initiating a CoS for the current packet loss rate measurement carried by the start counter request message;

The method for starting a counter in the packet loss rate measurement according to claim 2, wherein before the initiating MEP starts a counter for the CoS for which the current packet loss rate is measured, the method further includes: The MEP performs the packet loss measurement configuration.

The method for starting a counter in the packet loss rate measurement according to claim 3, wherein the initiator MEP sends a start counter request message to the peer MEP as:

When the initiator MEP performs the active packet loss rate measurement, the data module or the control module sends a start counter request message to the peer MEP; when the initiator MEP performs the on-demand packet loss rate measurement, A start counter request message is sent to the peer MEP through the data module.

The method for starting a counter in the packet loss rate measurement according to claim 4, wherein, after receiving the start counter request message, the peer MEP starts a corresponding counter, and sends the corresponding MEP to the initiator. The return start counter reply message is:

The method for starting a counter in a packet loss rate measurement according to any one of claims 2 to 5, wherein after the peer MEP returns a start counter reply message to the originating MEP, the method further includes :

The startup counter reply message indicates that the startup counter is successful, and the initiator MEP performs a packet loss rate measurement; the startup counter reply message indicates that the startup counter fails, and the initiator MEP terminates the packet loss rate measurement, and returns an error prompt.

A system for starting a counter in a packet loss rate measurement, the system comprising: an initiator MEP and a peer MEP;

The system for starting a counter in the packet loss rate measurement according to claim 7, wherein the start counter request message sent by the originating MEP to the opposite MEP carries at least the CoS for the current packet loss rate measurement. ;

The start counter reply message returned by the peer MEP to the originating MEP carries at least The indication with the peer MEP for the success of the CoS start counter for which the current packet loss rate is measured.

9. The system for starting a counter in a packet loss rate measurement according to claim 8, wherein:

The initiating MEP is further configured to perform a packet loss rate measurement configuration. When the initiating MEP is configured as an active packet loss rate measurement, the packet loss rate measurement configuration parameter includes: the CoS and the target of the packet loss rate measurement. The transmission period of the packet loss rate measurement message;

When the initiating MEP is configured as an on-demand packet loss rate measurement, the packet loss rate measurement configuration parameters include: a CoS, a packet loss rate measurement message transmission period, and a packet loss rate measurement message for the current packet loss rate measurement. The number of transmissions.

10. The system for starting a counter in a packet loss rate measurement according to claim 9, wherein:

When the initiator MEP performs the active packet loss rate measurement, the data module or the control module sends a start counter request message to the peer MEP. When the initiator MEP performs the on-demand packet loss rate measurement, the data module is forwarded through the pair. The MEP sends a Start Counter Request message.

The system for starting a counter in the packet loss rate measurement according to claim 10, wherein after receiving the start counter request message, the peer MEP starts a corresponding counter, and sends the corresponding MEP to the initiator. The return start counter reply message is:

12. A system for starting a counter in a packet loss rate measurement according to any one of claims 8 to 11. System, which is characterized by