Method for link self-loop test on IMA interface

Abstract

The invention discloses a loop-back detecting method of a chain circuit on the IMA interface, the loop-back detecting method comprises the following steps: A, a chain circuit E1 in the IMA group is selected as a loop-back detecting chain circuit, the chain circuit ID of the chain circuit E1 is a first ID value; B, the value of end-to-end channel field of ICP cell transmitted through the IMA groupis set as any value R from 1 to 255; C, the ICP cell received on the chain circuit E1 is captured, the chain circuit ID is analyzed as a second ID value, and the value of the end-to-end channel fieldis analyzed as a second field value; D, when the second ID value is equal to the first ID value, and the second field value is equal to R, the success of the loop-back chain circuit E1 is judged, theloop-back warning of the chain circuit E1 is reported, and simultaneously, the chain circuit E1 in the IMA group is set as unavailable; otherwise, the loop-back chain circuit E1 is unsuccessful, and if the chain circuit E1 is in the loop-back warning state, the restoration of the loop-back warning of the chain circuit E1 is reported, and the chain circuit E1 is installed as available. The condition of certain loop-back chain circuit in the IMA group can be automatically judged through a procedure in the loop-back detecting method, and the loop-back chain circuit is automatically eliminated, to ensure the normal work of the IMA.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a self-loop detection method for physical links between communication devices interconnected based on the IMA protocol. Background technique [0002] ATM Inverse Multiplexing (IMA-Inverse Multiplexing for ATM) is a method proposed by the ATM Forum (Asynchronous Transfer Mode) to multiplex multiple low-speed physical links (such as E1 / DS1) into relatively high-speed logical links for transmission. ATM cell method. Its basic working principle is attached figure 1 As shown, the ATM data flow at the sending end is distributed to each physical link in turn in units of cells, and the ATM data flow is recovered in the same order at the receiving end. The two sides of IMA communication use a special ICP (IMA Control Protocol-IMA Control Protocol) cell to negotiate parameters and exchange status information between the two parties, so that as long as one physical link in the IMA ...

AI Technical Summary

Problems solved by technology

The general method is to first disconnect all E1 connections on the distribution frame at the RNC side, then self-loop a certain E1 towards the NODEB side, and arrange a person in the NODEB computer room to observe whether the ATM upper-layer protocol SSCOP can be communicated to judge the connection. Whether the E1 self-loop is successful or not, you must cancel the self-loop of this E1 and let other E1s connect normally. The whole process is time-consuming and laborious.

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