A network failure testing method under asynchronous transmission mode

Abstract

The invention discloses an asynchronous transfer mode network fault testing method which comprises the following steps that: step one, a sending network element and a receiving network element adopt a service specific connection oriented protocol to transmit data; step two, the sending network element sends a test request data packet to the receiving network element; step three, the receiving network element receives the test request data packet sent by the sending network element and then sends a test response data packet to the sending network element; step four, the sending network element judges whether the test response data packet is received, the step five is executed if the test response data packet is received; step five, the sending network element compares the time of receiving the test response data packet with the time of sending the test response data packet to obtain the time delay of the data.

Description

technical field [0001] The invention relates to the field of asynchronous transfer mode (ATM) transmission, in particular to an ATM network fault testing method. Background technique [0002] ATM (Asynchronous Transfer Mode) is a fast packet transfer technology. ATM transmission adopts the ATM cell format of fixed byte length to transmit in the network in an asynchronous manner. The ATM data transmission mode is carried out according to the ATM protocol model, and the ATM protocol reference model includes the physical layer, the ATM layer, the adaptation layer AAL (or the signaling adaptation layer SAAL) and high-level applications. AAL adapts high-level information into ATM letter yuan so that it can be transmitted through the ATM network, and then takes the information out of the ATM letter yuan and submits it to the upper level. [0003] Since AAL5 can realize high-efficiency data service transmission adaptation, the AAL5 adaptation type is widely used in data transmiss...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to detect in real time the abnormal situation that small packet data can be sent but large packet data cannot be sent on the network when using SSCOP protocol to carry out ATM data transmission between two network elements of the ATM network, and adopt SSCOP A specific type of protocol data unit (PDU) in the protocol is used for network detection, providing users with positioning test means

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