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Method for measuring frame loss, system for measuring frame loss, and device for measuring frame loss

A measurement method and measurement system technology, applied in the transmission system, electrical components, etc., can solve the problems of zero processing time, low processing speed, complex and large-scale circuits, etc.

Inactive Publication Date: 2010-12-22
FUJITSU LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] However, even if it is realized by hardware, it is impossible or difficult to reduce the processing time from the generation of the OAM frame to the transmission to zero, which leads to the complexity and scale of the circuit, and also has the disadvantages of low processing speed

Method used

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  • Method for measuring frame loss, system for measuring frame loss, and device for measuring frame loss

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Embodiment Construction

[0027] Hereinafter, the present invention improves the single-end and double-end frame loss measurement described in the above-mentioned ITU-T Recommendation Y.1371 and will be described as an embodiment of the present invention, but the present invention is not limited thereto. For example, the method of the present invention can also be applied to loss measurement of a path set on an IP network based on MPLS (Multi Protocol Label Switching) technology.

[0028] figure 1 A first example of the configuration of an apparatus for realizing single-ended frame loss measurement according to an embodiment of the present invention is shown.

[0029] The frame transmitting section 10 has: a frame transmitting circuit 12 that transmits data frames or OAM frames; a transmission counter 14 that counts the number of data frames transmitted from the frame transmitting circuit 12; and an OAM frame generating section 16 that generates frames for OAM frames for frame loss measurement (LMM fr...

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Abstract

A method for calculating frame loss accurately without causing complexity, large-scale size, and degraded processing speed. A transmitting counter (14) counts the number of data frames transmitted between a device (32) and a device (34), while a receiving counter (24) counts the number of received frames. At the time of transmission of OAM frame for measuring frame loss of LMM frame (36), LMR frame (38), CCM frame or the like, a value of the transmitting counter (14) is saved to a transmitting counter value save memory (18). In generating the OAM frame at an OAM frame generation section (16),a value stored on the transmitting counter value save memory (18) is used to generate the OAM frame on which a transmitting counter value at the time of transmission of the OAM frame transmitted immediately before is placed. Frame loss is calculated based on a difference from the previous value of the transmitting counter value placed on the OAM frame and a difference from the previous value of the receiving counter value at the time of reception of the OAM frame received immediately before.

Description

technical field [0001] The present invention relates to a method and system for measuring frame loss or packet loss as an index indicating the quality of a path set on a network, and an apparatus used in the method and system. Hereinafter, frames and packets are collectively referred to as "frames", and frame loss and packet loss are collectively referred to as "frame loss". Background technique [0002] As a method of measuring the frame loss of the path set on the network, Section 8.1 of ITU-T Recommendation Y.1731 discloses the measurement of the frame loss of the service path set on the Ethernet (registered trademark) (ETH- LM: Ethernet (registered trademark) Loss Measurement). In the disclosed ETH-LM, a transmission counter is used to count the number of frames transmitted in the MEP (Maintenance entity group End Point, maintenance entity group end point) on the transmission side. And, an OAM (Operation, Administration and Maintenance) frame carrying the value of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/14H04L69/40
CPCH04L47/10H04L43/0841H04L47/34H04L43/0811
Inventor 深川恭
Owner FUJITSU LTD
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