Method for call quality test based on dual tone multi frequency

Abstract

The invention discloses a method for call quality test (CQT) based on a dual tone multi frequency (DTMF), using two monitoring terminals as a calling terminal and a called terminal for simulating the communication of subscribers. The method comprises the following steps: the calling terminal calls the called terminal, so that a voice link connection can be established between the two terminals; the calling terminal and the called terminal send a first DTMF code and a second DTMF code having fixed values to one another respectively at regular intervals within the test time, and receive the second DTMF code and the first DTMF code having the corresponding values respectively; the calling terminal and the called terminal count the respective number of the received DTMF code respectively and compare the number with the given judgment threshold value, if the number is lower than the judgment threshold value, the current link is in a single channel state, and if not, the current link is in a normal state; and the calling terminal and the called terminal record the respective state of the tested current link respectively, and either terminal hangs up, so that the voice link can be disconnected. By automatically conducting the mutual-dialing test of the CQT, the method has the advantages of easy achievement, low cost, high accuracy and reliability and has great values of application and popularization.

Description

technical field [0001] The invention relates to the field of wireless network optimization, in particular to a method for testing call quality based on Dual Tone Multi Frequency (DTMF for short). Background technique [0002] One-way or double-no-way phenomenon is a problem often encountered in mobile communication networks, and it is also a problem that mobile communication users complain more about. In the mobile communication network, one-way communication refers to the phenomenon that one party can hear the voice of the other party when the call connection has been established, but the other party cannot hear the voice of the other party. When both parties have established a call connection, neither party can hear the other party's voice. There are many reasons for one-way or two-way failures, such as the presence of mandarin lines or loopbacks in the transmission link, the incompatibility of link data time series data, and the mismatch between the uplink and downlink l...

AI Technical Summary

Problems solved by technology

Due to the low probability of single-pass or double-no-pass, it is difficult to find the problems existing in the mobile communication network through manual CQT; although automatic CQT can realize continuous and uninterrupted automatic single-pass test to a certain extent, thus monitoring single-pass or double-pass However, it is difficult to realize the automatic one-way or double-no-way test. In the early days, it was usually realized through voice digital processing and analysis methods. This method is complicated to implement, high in cost, and difficult to popularize.

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