CN1988401A

CN1988401A - System and method for preventing misreceiving number echo

Info

Publication number: CN1988401A
Application number: CN 200610114798
Authority: CN
Inventors: 张明星; 金凤昕; 肖金平
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2006-11-23
Filing date: 2006-11-23
Publication date: 2007-06-27

Abstract

This invention relates to a systm for preventing error-receiving number echoes including an exchange call control process module, an echo eliminating module and a receiving module, in which, the receiving module is used in receiving dual voice multi-frequency signals, said echo eliminating module is composed of a resource echo elimination unit used in eliminating echoes of multiple channels, said exchange call process module is used in judging if it is necessary to start up said number receiving module in the call process of the calling and called to apply for said echo elimination module, the call circuit and said number receiving module and control the connection of the recceiving module and the echo elimination module and release connection of the channels with said echo elimination module and said receiving module.

Description

A kind of system and method that prevents misreceiving number echo

Technical field

The present invention relates to the digital communication switching technology in the communication technology, relate in particular to a kind of system and method that prevents misreceiving number echo.

Background technology

In the implementation of fixed network 2.5G (in perhaps similar other possible implementations), move on in the tandem exchange (iMS) on the data of exchange end office (EO) (LS) are whole, LS only plays the effect of an access, all call business controls are controlled by iMS, because connect by No. seven circuit between LS and the iMS, so the user's of LS hook flash signal can't be delivered to iMS, but by changing user's use habit, replace hooking as dialling ##, this just needs the iMS side for this user is ready to the equipment that collects the digits, and is used to receive touch-tone signal (DTMF) signal.Because dial ## after the conversation, this dtmf signal is wanted to be received by the own module that collects the digits exactly and be discerned, and the echo by speech channel, the DTMF that can pass to the opposite side of the conversation module that collects the digits; If the opposite side of conversation has also used the module that collects the digits, then this signal can not needed the DTMF of this signal module that collects the digits to receive identification, causes the number mistake to receive.When the calling and called both sides might use fork spring business in communication process, the iMS side will all connect the module that collects the digits the both sides that converse, to be used for receiving switch hook signal possible in the conversation.Because the effect of the echo of speech channel, the switch hook signal that may cause certain side to dial is received by an other side, causes business normally to realize, for example the calling and called both sides have the business of three-party talking function.

Fig. 1 is background problems environment description figure of the present invention.Curve 11 is dtmf signals that user A side is dialed among the figure, and user A wants to enable Three-Way Calling in the conversation, and the user has dialed ## and replaced dialing hook switch; This moment, the imaginary curve 12 described echoes that are exactly this signal in the formation of called subscriber B side if level still within the specific limits, can cause the DTMF_B digit receiver of called subscriber B side also to receive ##, caused the number mistake to receive.

Summary of the invention

In order to solve above-mentioned technical problem, a kind of system and method that prevents misreceiving number echo is provided, its purpose is, makes full use of the existing hardware and software resource of digital SPC exchange, ensures that the user uses new business smoothly.

The invention provides a kind of system that prevents misreceiving number echo, be arranged in the switch, described system comprises calling of switchboard control treatment module, echo cancellation module and the module that collects the digits;

The described module that collects the digits is used to receive touch-tone signal;

Described echo cancellation module is eliminated the unit by resource-type echo and is constituted, and the echo that is used for multi-path call is eliminated;

Described calling of switchboard control treatment module, be used for whether needing to enable the described module that collects the digits at the calling procedure of judging Calling Side and callee side, apply for described echo cancellation module, call circuit and the described module that collects the digits, and control the described module that collects the digits and be connected, and discharge speech channel behind the end of calling and continue and being connected of described echo cancellation module and the described module that collects the digits with described echo cancellation module.

The present invention also provides a kind of method that prevents misreceiving number echo, may further comprise the steps:

Step 201, callee side judge whether Calling Side and described callee side need enable the module that collects the digits in conversation, if, then notify described Calling Side, and execution in step 202, otherwise carry out the ordinary call flow process;

Step 202, described Calling Side and described callee side application echo cancellation module and the module that collects the digits continue call circuit, described echo cancellation module and the described module that collects the digits;

Step 203, after calling discharged, described Calling Side discharged being connected of described echo cancellation module and the described module that collects the digits with described callee side, and the release speech channel continues.

Comprise also whether step 204, described Calling Side will use the information of the module that collects the digits to issue described callee side before the described step 201.

In the described step 202, if in communication process, the described module that collects the digits need be released, and the new callee side that need continue again, then discharges described echo cancellation module earlier, and application continues again then.

Compared with prior art, the present invention is on the basis of switch device, directly utilize the existing resource of system, by increasing the part hardware processing module and in the exchange control processing system, realizing the calling of switchboard control treatment module, realize a kind of echo cancelling system that is equal to fully on the function.

System of the present invention is built in switch system fully, and user's only use expense when buying switch system seldom can obtain this kind system; The present invention can be embedded in the process of calling and carries out real-time control, can carry out echo as required and eliminate the inhibition of (ECC) echo, saves the ECC resource.

Description of drawings

Fig. 1 is background problems environment description figure of the present invention;

Fig. 2 is a system block diagram of the present invention;

Fig. 3 is the speech channel of calling subscriber's side among the present invention schematic diagram that continues;

Fig. 4 is the speech channel of called subscriber's side among the present invention schematic diagram that continues;

Fig. 5 is the realization flow figure that prevents the misreceiving number echo method among the present invention.

Embodiment

Down in conjunction with the accompanying drawings, describe the embodiment of technical solution of the present invention in detail.

As shown in Figure 2, be the system block diagram of system of the present invention, this system is built in switch system, comprises foreground call control process module 21 and ECC module 22.

Call control process module 21, a functional module in the treatment system of machine master control in return and existing, thus this module is to add the echo cancellation process process to realize the echo inhibition in the calling procedure control and treatment task of switch master control system.Judge user's traffic performance at first in conversation, according to whether needs suppress echo, application ECC resource connects the ECC circuit with the relevant speech channel of the module that collects the digits, thereby prevents echo before enabling the module that collects the digits.In the service call process, exist speech channel to discharge and set up, along with the release and the application of the module that collects the digits, also need to discharge and the ECC circuit that continues according to the actual conditions module that will collect the digits.After calling out release, give back release with the ECC resource; This module is the core of whole echo cancelling system.

ECC module 22 is mainly eliminated the unit by communication switchboard resource-type echo and is constituted, and is to finish the key hardware parts that echo is eliminated.The ECC module compared time slot circuit ECCTLN1 and suppresses time slot circuit ECCTLN2 by inserting during 22 each inhibition, and inside compares, and reaches the effect that can suppress echo on the circuit that picks out; Adopt public echo to suppress the mode of resource, apply for during use, do not give back after not re-using;

What the present invention relates to prevents the misreceiving number echo method flow as shown in Figure 5, may further comprise the steps:

Step 100, before the call setup, whether Calling Side uses the information of the module that collects the digits to issue callee side in conversation Calling Side.

Step 101, callee side are received the information that step 100 is sent, and judge whether callee side uses the module that collects the digits in conversation;

Step 102 judges whether whether both sides all will use the module that collects the digits, if then explanation needs the module that collects the digits is connected ECC in calling out, and the notice Calling Side, execution in step 200, otherwise carry out common call flow.

Step 200, after the conversation beginning, Calling Side (OP) is applied for ECC module, the module that collects the digits before need enabling the module that collects the digits, then with call circuit, the ECC module, the module that collects the digits of application continues; As shown in Figure 3.Be that caller suppresses to needs to the callee at this moment, caller time slot circuit meets ECCTLN1, and called time slot circuit and caller digit receiver time slot meet ECCTLN2.Specifically continue as shown in Figure 3.

Step 201, after the conversation beginning, callee side (TP) needs the preceding application of reception module ECC module, the module that collects the digits, then with call circuit, the ECC module, the module that collects the digits of application continues; As shown in Figure 4.Be to be called into the calling party to suppress to needs at this moment, caller time slot circuit meets ECCTLN2, and called time slot circuit and called digit receiver time slot meet ECCTLN1.Specifically continue as shown in Figure 4.

Step 300 discharges the module that collects the digits if desired in the conversation, and the new callee side that continues again converses, and then needs to discharge earlier the ECC module, distinguishes the calling and called side then equally, set by step 200 or step 201 continue;

Step 400, after call out discharging, the calling and called side need discharge being connected of ECC and the module that collects the digits.The release speech channel continues.

The user can not pay extra cost or append the function that just can obtain the echo inhibition under the situation of low-down expense after buying switch device; Can be according to the actual needs of both call sides, carry out the echo inhibition, thereby can peak efficiency utilize the ECC resource.

Those skilled in the art can also carry out various modifications to above content under the condition that does not break away from the definite the spirit and scope of the present invention of claims.Therefore scope of the present invention is not limited in above explanation, but determine by the scope of claims.

Claims

1. a system that prevents misreceiving number echo is arranged in the switch, it is characterized in that, described system comprises calling of switchboard control treatment module, echo cancellation module and the module that collects the digits;

2. a method that prevents misreceiving number echo is characterized in that, may further comprise the steps:

3. the method that prevents misreceiving number echo as claimed in claim 2 is characterized in that, comprises also whether step 204, described Calling Side will use the information of the module that collects the digits to issue described callee side before the described step 201.

4. the method that prevents misreceiving number echo as claimed in claim 2 is characterized in that, in the described step 202, if in communication process, the described module that collects the digits need be released, and the new callee side that need continue again, then discharge described echo cancellation module earlier, application continues again then.