CN1574767A - On-line method for testing echoing characteristic of communication system and testing system thereof - Google Patents
On-line method for testing echoing characteristic of communication system and testing system thereof Download PDFInfo
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- CN1574767A CN1574767A CN 03147372 CN03147372A CN1574767A CN 1574767 A CN1574767 A CN 1574767A CN 03147372 CN03147372 CN 03147372 CN 03147372 A CN03147372 A CN 03147372A CN 1574767 A CN1574767 A CN 1574767A
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Abstract
The present invention discloses an on-line method for testing echoing characteristic of communication system. The method includes the following steps: setting talking business channel between the calling subscriber and the called subscriber in the communication system; providing the calling subscriber number to a testing system and sending testing command; the testing system acquires the business channel occupied by the calling subscriber from the resource management module in the communication system; the testing system sends testing signal to the business channel and receives the echoing signals; analyzing the echoing signals and obtaining at least one of the echoing time delay and echoing back waste of the tested communication system. The invention also discloses an echoing characteristic testing system.
Description
Technical field
The present invention relates to the communication network measuring technology, particularly the on-line testing method and the test macro of communication system echoing characteristics.
Background technology
At long distance telephone network or wireless communication system, in GSM (global system for mobile communications), CDMA (code division multiple access) system,, tend to produce echo owing to reasons such as circuit itself do not match.In order to make receiving end signal clear, pure, generally to dispose echo eliminator.The disposal ability of echo eliminator has determined echo eliminator can eliminate great echo time delay, if the real system echo time delay surpasses the disposal ability of echo eliminator, just can't eliminate echo effectively.
General echo eliminator adopts digital signal processor, and (Digital Signal Processor realizes that DSP) echo time delay is more little, requires the disposal ability of DSP low more, and cost is also more little.Therefore taking cost into account, according to the size of actual ghosts time-delay, configuration suitable capability echo eliminator can be saved cost.Many echo eliminators echo time delay as a parameter that can be provided with, so that be configured according to actual conditions.In addition, the suitable echo return loss parameter of configuration on the echo eliminator of configuration can be so that echo eliminator be more accurate to the detection of echo, thereby can more effectively eliminate echo.Therefore, echo time delay and echo return loss parameter value is definite extremely important.
At present, some testers can be tested the echo time delay and the echo return loss of communication system, and the interface of employing is E1/T1 (E1:2Mbps, T1:1.5Mbps) interface.When test, need be connected in series to instrument in the system.As shown in Figure 1, tester is connected in the E1 interface between base station control center (BSC) and the mobile switching centre (MSC), can test b SC, MSC, echo time delay and echo return loss between the public telephone network (PSTN).
The tester though echo time delay and echo return loss that existing tester can test macro, the E1/T1 holding wire that needs to be in the parting system connection status during test are contacted, thereby service that can interrupt system; In addition, also need manually to search the system channel resource that takies, inefficiency.
Summary of the invention
The object of the present invention is to provide a kind of on-line testing method and test macro of communication system echoing characteristics, to solve the problem that the test macro echo time delay needs interrupt system to serve in the prior art.
To achieve these goals, the invention provides following technical scheme:
A kind of on-line testing method of communication system echoing characteristics is characterized in that comprising step:
Set up the Traffic Channel of conversation between A, the calling subscriber in communication system and the called subscriber;
B, described rear subscriber number is provided and issues test command to test macro;
C, test macro obtain the Traffic Channel that described calling subscriber takies according to calling number from the resource management module of communication system;
D, test macro send test massage and receive echo-signal to described Traffic Channel;
E, echo-signal is carried out analyzing and processing, obtain one of the echo time delay of tested communication system and echo return loss at least.
A kind of echoing characteristics test macro comprises:
The operation maintenance device that issues and obtain test result that is used for test command;
Obtain the system business channel resource of this CU according to operation maintenance device input Subscriber Number from system under test (SUT), and according to the control module of test command control test process;
Be used to store the memory module of data test signal and echo signal data;
Under the control of control module, the data test signal in the memory module is sent to the data transmission blocks of Traffic Channel;
Under the control of control module, will store the data reception module of described memory module into from the echo signal data that Traffic Channel receives; And
Under the control of control module, the data test signal in the memory module and echo signal data are carried out the data analysis module of analyzing and processing.
The present invention can be rapid, easily under the situation of not interrupt communication system service, echo return loss in the communication system and echo time delay are carried out on-line testing, compare with existing measuring technology, the present invention is on the basis of communication system existing resources management information and memory resource and calculation resources, by increasing relevant control, data send, Data Receiving, data analysis processing module etc., echo return loss on-line testing function is provided, made full use of the device resource of communication system itself, improved the service quality of communication system, the loss of having avoided the communication system service disruption to cause.Simultaneously, the present invention searches the system business channel resource that passage to be tested takies automatically according to user's sign (as IMSI number of mobile phone), does not need manually to search Traffic Channel, has improved automaticity, reliability and the efficient of test.
Description of drawings
Fig. 1 is for utilizing the schematic diagram of tester test echoing characteristics in the prior art;
Fig. 2 is test system structure block diagram of the present invention and test philosophy schematic diagram;
Fig. 3 is the connection diagram of the current busy channel in test macro of the present invention and the communication system;
Fig. 4 is integrated in the schematic diagram that the test macro of the base stations control heart of cdma system is tested;
Fig. 5 is integrated in the schematic diagram that the test macro of the mobile switching centre of cdma system is tested;
Fig. 6 is a test flow chart of the present invention;
Fig. 7 is an echo path model schematic diagram.
Embodiment
Consult shown in Figure 2ly, the echoing characteristics Online Transaction Processing comprises operation maintenance device 100, control module 110, data transmission blocks 120, data reception module 130, data analysis module 140 and memory module 150,160.
Operation maintenance device 100 has the human interface function, finishes issuing of test command and obtaining of test result data.
Control module 110, be connected with operation maintenance device 100 by message interface, according to from test subscriber's number of operation maintenance device 100 input (as, mobile phone IMSI number etc.), control module 110 is initiated to search the request of the channel resource that the test subscriber takies and is obtained the channel appointed resource information to the resource management module of communication system, order data sending module 120 sends test data to the Traffic Channel of appointment then, data reception module 130 is from the Traffic Channel image data of appointment, the control data analysis module is analyzed the data of gathering, handle, and result return attending device.
Data transmission blocks 120 under the control of control module 110, is finished the data sending function, promptly the reference signal in the reference signal data storage area 150 is sent to the Traffic Channel that the test subscriber takies.
Data reception module 130 under the control of control module 110, is finished the Data Receiving function, promptly receives from the echo signal data of Traffic Channel and stores in the received signal data storage area 160.
Data analysis module 140 under the control of control module 110, is finished the analyzing and processing to reference signal data and echo signal data in the memory module, and is provided test result.
Memory module is used to store data; Be divided into data test signal memory block 150 and received signal data storage area 160.
Consult shown in Figure 3ly, the resource management module of communication system obtains corresponding channel resource according to test subscriber's number mark.Control module initiates to search the request of the channel resource that the test subscriber takies to resource management module, resource management module utilizes Subscriber Number as index, find corresponding channel resources information, pass through the query requests of message interface response module then, thereby control module obtains the channel appointed resource information.
Consult shown in Figure 4ly, test macro is integrated in base station control center (BSC) subsystem of cdma system.Comprise the encoding and decoding speech module in the BSC subsystem, this module adopts digital signal processor (DSP) to realize, a DSP can handle the encoding and decoding speech of a plurality of Traffic Channels, be called the audio coder ﹠ decoder (codec) resource, utilize the hardware resource of DSP can realize the software function of test macro data transmission blocks, data reception module, data analysis module.Also comprise the channel resource management module in the BSC subsystem, this module generally goes up at central processing unit (CPU) and realizes, be responsible for which audio coder ﹠ decoder (codec) resource of CU of assignment and administer calls, utilize the hardware resource of CPU can realize the software function of test macro control module.Also comprise operation maintenance device in the BSC subsystem, generally on server, realize, utilize the existing operation maintenance device of BSC subsystem, can realize the function of operation maintenance device in the test macro.The echoing characteristics test macro can select to test any one time slot from BSC to MSC.
Consult shown in Figure 5, test macro is integrated in the mobile switching centre (MSC) of cdma system, in the MSC subsystem, equally also include encoding and decoding speech module, channel resource management module, operation maintenance device, test macro in the realization of mobile switching centre with identical in base station control center.The echoing characteristics test macro can select to test any one time slot from MSC to PSTN.
Consulting shown in Figure 6ly, is example with test system and test MSC and the echoing characteristics between the PSTN that is integrated among the MSC in the cdma system, and wherein echoing characteristics is mainly echo time delay and echo return loss, and its testing process is as follows:
1, makes a call by the fixed telephone subscriber of the mobile subscriber in the cdma system in PSTN, and set up the Traffic Channel of conversation.
Set up and make landline telephone side keep quite (as: pulling out microphone etc.) after the Traffic Channel.Because need to estimate according to the echo that returns the time-delay of echo, so echo should not receive the interference of fixation side signal, keeps quite or pulls out microphone and can meet the demands.
2, import mobile subscriber's international mobile subscriber identification number (IMSI) from operation maintenance device, and issue test command to control module.
3, control module is obtained the channel resource that current phone takies from the resource management module of mobile switching centre (MSC).
4, control module control data sending module sends to MSC corresponding service channel from the data test signal memory block reading of data of memory module.Signal produces echo-signal through behind MSC, the PSTN on PSTN, echo-signal is returned MSC, and is sent to the echoing characteristics test macro, is received by data reception module, stores the received signal data storage area of memory module into.
5, data analysis module carries out obtaining echo return loss and echo time delay size to analyzing, handling to the data in reference signal data storage area and the received signal data storage area, is shown test results by operation maintenance device.
It is to be obtained test signal from the reference signal data storage area and obtained echo-signal from the received signal data storage area by data analysis module that analyzing and processing obtains the echo return loss; Described data analysis module analysis, handle described transmission signal and echo-signal, obtain the level of described transmission signal and echo-signal respectively; By sending the subtraction calculations of signal level and echo-signal level, obtain the numerical value of echo return loss.
The first step that analyzing and processing obtains the echo time delay size be adopt sef-adapting filter and least mean-square error (Least Mean Square, LMS) algorithm calculates the model of echo path; Second step was to estimate the echo time-delay from the supplemental characteristic of echo path model.Consult Fig. 7, at the curve representation echo path that axis of abscissas fluctuates up and down, general echo path comprises one section pure time delay part and one section dynamic change part, and the echo path numerical value of pure time delay part is 0, the envelope of dynamic part has roll-off characteristic from big to small, and finally trends towards 0.Echo time delay refers to following interval: the envelope that begins dynamic part to the echo path model from axis of abscissas starting point (position 0) is than setting the echo time delay that time delay between the little point of threshold value is system
Though present embodiment is that test describes example to echoing characteristics with echo time delay and echo return loss parameter, but be not limited in this, the inventive method also can be tested other parameters of echoing characteristics according to the echo-signal that obtains, and its test philosophy is identical.
Claims (11)
1, a kind of on-line testing method of communication system echoing characteristics is characterized in that comprising step:
A, between the calling subscriber of communication system and called subscriber, set up the talk business channel;
B, described rear subscriber number is provided and issues test command to test macro;
C, test macro obtain the Traffic Channel that described calling subscriber takies according to calling number from the resource management module of communication system;
D, test macro send test massage and receive echo-signal from this Traffic Channel to described Traffic Channel;
E, echo-signal is carried out analyzing and processing, obtain one of the echo time delay of tested communication system and echo return loss at least.
2, the method for claim 1 is characterized in that, makes the called subscriber keep mute state after the Traffic Channel of setting up conversation, to eliminate interference signal.
3, the method for claim 1 is characterized in that, it is characterized in that the described talk business channel of setting up is to select any one base station control center from communication system (BSC) to set up Traffic Channel to the time slot of mobile switching centre (MSC).
4, the method for claim 1 is characterized in that, it is characterized in that the described talk business channel of setting up is to select any one mobile switching centre from communication system (MSC) to set up the talk business channel to the time slot of public telephone network (PSTN).
5, the method for claim 1 is characterized in that, step C comprises step:
Test macro is according to calling number, initiates to search the request of the channel resource that the calling subscriber takies by the resource management module of message interface in communication system;
Resource management module utilizes calling number as index, finds corresponding channel resources information; And
By message interface Query Result is returned to described test macro.
6, the method for claim 1 is characterized in that, in step e, obtains the echo return loss and comprises step:
The test signal that sends is carried out analyzing and processing and obtained the level of test signal;
The echo-signal that receives is carried out analyzing and processing and obtained the level of echo-signal;
Calculate the numerical value of echo return loss according to the level meter of the level of the test signal that obtains and echo-signal.
7, the method for claim 1 is characterized in that, in step e, obtains echo time delay and comprises step:
According to the echo-signal that receives, adopt sef-adapting filter and least mean-square error (LMS) algorithm computation to go out the model of echo path;
From the supplemental characteristic of echo path model, estimate echo time delay.
8, the method for claim 1 is characterized in that, described tested communication system is that wired toll telephone system is or/and wireless communication system.
9, a kind of echoing characteristics test macro is characterized in that comprising:
The operation maintenance device that issues and obtain test result that is used for test command;
Subscriber Number according to input obtains the system business channel resource of this CU from system under test (SUT), and according to the control module of test command control test process;
Be used to store the memory module of data test signal and echo signal data;
Under the control of control module, the data test signal in the memory module is sent to the data transmission blocks of Traffic Channel;
Under the control of control module, will store the data reception module of described memory module into from the echo signal data that Traffic Channel receives; And
Under the control of control module, the data test signal in the memory module and echo signal data are carried out the data analysis module of analyzing and processing.
10, echoing characteristics test macro as claimed in claim 9 is characterized in that, this echo delay test system integration is in base station control center (BSC) subsystem of communication system; Wherein, described data transmission blocks, data reception module, data analysis module are integrated in the encoding and decoding speech module of described base station control center subsystem, described control module is integrated in the channel resource management module of described base station control center subsystem, and described operation maintenance device is integrated on the server of described base station control center subsystem.
11, echoing characteristics test macro as claimed in claim 7 is characterized in that, this echo delay test system integration is in base station control center (BSC) subsystem of communication system; Wherein, described data transmission blocks, data reception module, data analysis module are integrated in the encoding and decoding speech module of described BSC subsystem, described control module is integrated in the channel resource management module of described BSC subsystem, and described operation maintenance device is integrated on the server of described BSC subsystem.
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| CNB031473725A CN100379210C (en) | 2003-06-08 | 2003-07-12 | On-line method for testing echoing characteristic of communication system and testing system thereof |
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| CN03137324.0 | 2003-06-08 | ||
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| CNB031473725A CN100379210C (en) | 2003-06-08 | 2003-07-12 | On-line method for testing echoing characteristic of communication system and testing system thereof |
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| CN1574767A true CN1574767A (en) | 2005-02-02 |
| CN100379210C CN100379210C (en) | 2008-04-02 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101145970B (en) * | 2007-10-11 | 2010-09-08 | 中兴通讯股份有限公司 | System and method for online location of communication system device failures |
| CN102833434A (en) * | 2012-08-15 | 2012-12-19 | 深圳市共进电子股份有限公司 | Method, device and system for detecting network-side dual-tone multi-frequency signals |
| CN106448698A (en) * | 2016-11-17 | 2017-02-22 | 北京世纪东方国铁科技股份有限公司 | Test device for analyzing voice delay of voice device, system and method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IL115892A (en) * | 1994-11-10 | 1999-05-09 | British Telecomm | Interference detection system for telecommunications |
| IT1293441B1 (en) * | 1997-07-11 | 1999-03-01 | Sip | PROCEDURE AND DEVICE FOR MEASURING THE ECHO PARAMETERS ON TELEPHONE LINES. |
| DE19946762C2 (en) * | 1999-09-29 | 2002-07-11 | Siemens Ag | Method for measuring the operating characteristics of a subscriber line module for high bit rate data transmission |
| WO2001024491A1 (en) * | 1999-09-30 | 2001-04-05 | Telcordia Technologies, Inc. | Improved method for determining subscriber loop make-up |
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2003
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101145970B (en) * | 2007-10-11 | 2010-09-08 | 中兴通讯股份有限公司 | System and method for online location of communication system device failures |
| CN102833434A (en) * | 2012-08-15 | 2012-12-19 | 深圳市共进电子股份有限公司 | Method, device and system for detecting network-side dual-tone multi-frequency signals |
| CN102833434B (en) * | 2012-08-15 | 2014-02-19 | 深圳市共进电子股份有限公司 | Method, device and system for detecting network-side dual-tone multi-frequency signals |
| CN106448698A (en) * | 2016-11-17 | 2017-02-22 | 北京世纪东方国铁科技股份有限公司 | Test device for analyzing voice delay of voice device, system and method |
| CN106448698B (en) * | 2016-11-17 | 2024-04-02 | 北京世纪东方智汇科技股份有限公司 | Testing device, system and method for analyzing voice delay of voice equipment |
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