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A frame loss detection method, device and maintenance entity group endpoint

A technology for loss detection and maintenance of entities, which is applied in digital transmission systems, electrical components, and error prevention. It can solve problems such as loss, average transmission time difference of data frames, frame errors, etc., and achieve good compatibility and flexible methods.

Active Publication Date: 2016-01-20
RAISECOM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0041] In the above method, during the transmission of CCM frames or LMM and LMR frames, only one frame is sent at a time, which may be lost, or the actual transmission time of the frame may fluctuate due to changes in the network status and be inconsistent with the data There is a large difference in the average transmission time of the frame, resulting in a different size between the time window on which the data frame is sent (hereinafter referred to as the sending time window) and the time window on which the data frame is received (hereinafter referred to as the receiving time window) , or there is a large difference between the delay of the receiving time window relative to the sending time window and the average transmission time of the data frame, which will cause the error of frame loss detection

Method used

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  • A frame loss detection method, device and maintenance entity group endpoint
  • A frame loss detection method, device and maintenance entity group endpoint
  • A frame loss detection method, device and maintenance entity group endpoint

Examples

Experimental program
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Effect test

Embodiment 1

[0097] This embodiment involves double-ended ETH-LM, and the two MEPs maintain clock synchronization, and periodically send CCM frames in the same manner at the same scheduled sending time. Hereinafter, among the two MEPs that are peer MEPs, the MEP that initiates frame loss detection is called the first MEP, and the other MEP is called the second MEP.

[0098] figure 1 Shown is a flow chart of the frame loss detection method performed by the first MEP, including:

[0099] Step 110, the first MEP notifies the second MEP of the information about the scheduled sending time of periodically sending the CCM frame;

[0100] The above-mentioned information of the scheduled sending time can be sent through a notification frame (also called a notification message), and the notification frame can also carry the mark of the CCM frame in addition to the information of the scheduled sending time, such as using the serial number "101" as a marker. The information of the scheduled sending...

Embodiment 2

[0131] This embodiment relates to a single-ended ETH-LM. Two MEPs keep clocks synchronized. Among the two MEPs that are peer MEPs, the MEP that actively initiates frame loss detection is called the first MEP, and the other MEP is called the second MEP. The first MEP sends the LMM frame, and the second MEP sends the LMR frame, but the scheduled sending time of the LMM frame and the LMR frame is the same.

[0132] Figure 4 Shown is a flow chart of the frame loss detection method performed by the first MEP, including:

[0133] Step 210, the first MEP notifies the second MEP of the scheduled sending time information of periodically sending the LMM frame;

[0134] In this step, the notification can be implemented in the same manner as in the first embodiment.

[0135] Step 220, the first MEP sends the LMM frame carrying Tx1 to the second MEP at each scheduled sending moment, and receives the LMR frame carrying Tx2, Tx'2 and Rx'2 sent by the second MEP;

[0136] In this step, th...

Embodiment 3

[0146] This embodiment provides a maintenance entity group endpoint (MEP) used in the above two embodiments based on the solutions provided in the above two embodiments, and the MEP includes a frame loss detection device, such as Figure 5 As shown, the frame loss detection device includes:

[0147] The appointment unit 10 is used to notify the peer MEP of the information of the scheduled sending time of the periodically sent Ethernet loss detection function (ETH-LM) frame, or determine the scheduled sending time of the ETH-LM frame according to the notification of the peer MEP;

[0148] The transceiver unit 20 is configured to send an ETH-LM frame carrying Tx to the peer MEP at each predetermined sending moment, receive the ETH-LM frame carrying Tx' and Rx' sent by the peer MEP, and the Tx in the ETH-LM frame is the value of the local transmission counter of the MEP that sent the ETH-LM frame at the scheduled sending time of the ETH-LM frame, and Tx' in the ETH-LM frame is th...

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Abstract

The invention discloses a frame loss detecting method and device as well as MEPs (maintenance entity group End Points). The method comprises the following steps that: a first MEP notifies information of a preset sending moment of periodically-sent ETH-LM (Ethernet Loss Measurement) frames to a second MEP; the first MEP sends the ETH-LM frames carrying Tx to the second MEP at each preset sending moment, and receives the ETH-LM frames carrying Tx' and Rx' sent from the second MEP; and the first MEP detects the frame loss at a remote end according to the Tx' and Rx' in the ETH-LM frames sent from the second MEP in the latest secondary preset sending moments of the second MEP. The invention also provides the frame loss detecting method and the corresponding MEPs for realizing the method. According to the invention, the sending moment is appointed between the equal MEPs so as to allow a sending time window and a receiving time window to be the same in size and relative time delay to be more reasonable on the premise of not increasing hardware, so that the frame loss detection is more accurate.

Description

technical field [0001] The present invention relates to an Ethernet loss detection function (ETH-LM: EthernetLossMeasurement), and more specifically, to a frame loss detection method, device and maintenance entity group endpoint (MEP: MaintenanceentitygroupEndPoint). Background technique [0002] In a network that requires frame exchange, due to business needs, devices need to communicate with each other, and need to send relevant data frames to maintain services. This involves, in order to maintain the normal operation of the business, it is necessary to have good performance between the links, so as to reduce the frame loss rate as much as possible and maintain the normal operation of the entire communication network. [0003] The frame loss rate is one of the important performance indicators to measure the quality of network links. It can be understood as: within a specified time range, between specific devices and between given data links, the data received by the receiv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00
Inventor 李庆妙
Owner RAISECOM TECH
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