CN101110654B - Method and device for testing network delay time - Google Patents
Method and device for testing network delay time Download PDFInfo
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- CN101110654B CN101110654B CN2007101296934A CN200710129693A CN101110654B CN 101110654 B CN101110654 B CN 101110654B CN 2007101296934 A CN2007101296934 A CN 2007101296934A CN 200710129693 A CN200710129693 A CN 200710129693A CN 101110654 B CN101110654 B CN 101110654B
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Abstract
A method and a device to test network time delay include components and procedures below. Firstly, two wireless terminals are switched on to realize a state of mutual call. And then, a sound source emits a voice sample. Here, a voice sample unprocessed by a wireless network is recorded to record a capture time T1 synchronously. Consequently, a same voice sample is recorded unprocessed by the wireless network through recording to synchronously record a capture time T2. It is necessary to measure difference between the T1 and T2 to acquire time delay of the tested wireless network. The present invention utilizes voice transmission and voice detection of wireless terminals and realizes accurate voice time delay measurement of the wireless network by measuring two moments before and after processing the voice sample signal. Besides, the present invention will not change the system at all and will conserve terminals for tests. More importantly, daily office equipments or living commoditiesare used as testing equipments, thus ensuring simple operation and slight test result deviation, applying to any test at any time and meeting test demands.
Description
Technical field
The present invention relates to wireless communication technology, relate in particular to a kind of wireless communication system network time delay measuring method and device.
Background technology
The voice quality of voice communication product can meet consumers' demand be weigh this system can commercial basic index, and voice delay time is to influence the most key in all indexs of voice quality an index.Time delay is increased to a certain degree, can cause the problem such as out of order, shake, packet loss of packets of information in the Network Transmission, has a strong impact on speech quality.Measure voice delay time end to end exactly, grasp the wireless network moving law,, become an important topic of wireless communication networks development for the improvement of network technology provides reliable theoretical foundation.
The voice delay time of cordless communication network, that is the spontaneous end of making arrangements for his funeral of speech samples sends, and passed through the wireless communication network system processing, arrives the time difference between the receiving terminal.Commercial voice delay time tester on the market adopts this principle mostly at present, cooperate the test of finishing voice delay time by terminal, but this quasi-instrument is professional class testing instrument, output is little, cost an arm and a leg, the communication system equipment developer is caused bigger development cost pressure, and in test, revise measurand, made the accuracy of test be under suspicion.In addition, also the someone attempts loading test badge on speech samples, has so not only changed measurand, and often can not really be used for actual test because of complicated operation.
In the current techniques, having a kind of method, mainly is that testing mobile phone is transformed, and respectively draws a lead by the microphone and the loudspeaker of mobile phone, is connected to oscilloscope, is respectively applied for the starting point of recording voice sample and the terminal point after the process network processes.Because in the middle of the voice delay time test, mobile phone is not only the part of system handles, and is the crucial measurer of delay testing, transformation to mobile phone, directly revised measurand and measurer, introduced new error, make the accuracy of test bigger depart from truth; And the described modification on mobile phone process of this method, relate to complicated operations technology, implement very complexity, the possibility of damaging mobile phone is also arranged, increased testing cost.In addition, the network delay test job is not limited to laboratory tests, often will test commercial network, need under vehicle-mounted mobile status, test, if carry heavy oscilloscope and mobile phone through transforming, can be because complicated operation in practical operation, and be difficult to carry out.
In sum, the voice delay time measuring technology scheme of a kind of simple possible of current needs comes network delay is tested.
Summary of the invention
Technical problem to be solved by this invention provides a kind of network delay method of testing and device, tests by the voice delay time of simple possible network delay is tested.
In order to address the above problem, the invention provides a kind of network delay method of testing, may further comprise the steps:
A, two wireless terminals of connection enter the state of communicating with each other;
After b, sound source were sent speech samples, by the speech samples of handling without wireless network under the sound recordings, T1 constantly caught in record simultaneously; Follow the same speech samples of handling through wireless network by under the sound recordings; T2 constantly caught in record simultaneously; Described sound source equates with the distance on sound source recording distance ground that apart from the distance of caller wireless terminal the earphone of described called wireless terminal is pasting recording ground;
C, measure the difference of described T2 and T1, i.e. T2-T1 obtains the time delay of the wireless network that will test, and the time delay of described wireless network comprises the processing delay of caller wireless terminal and the processing delay of called wireless terminal.
Further, said method also can comprise, among the described step b, is the same speech samples that the earphone of called wireless terminal sends by the same speech samples of handling through wireless network under the sound recordings.
The present invention also provides a kind of network delay testing apparatus, comprises caller wireless terminal, called wireless terminal, sound source module, recording module, wherein,
Sound source module is used to send speech samples;
Recording module is used to write down speech samples, and the moment of speech samples caught in record simultaneously; Described recording module comprises microphone; The distance of the described caller wireless terminal of described sound source module distance equates that with the distance of the described recording module of described sound source module distance the earphone of described called wireless terminal is pasting the microphone of recording module;
Connect two wireless terminals, sound source module sends speech samples, and recording module is noted the speech samples of handling without wireless network, and T1 constantly caught in record simultaneously; Recording module is noted the same speech samples that the earphone of called wireless terminal sends, T2 constantly caught in record simultaneously, the difference that obtains T2 and T1 is the time delay of the wireless network that will test, and the time delay of described wireless network comprises the processing delay of caller wireless terminal and the processing delay of called wireless terminal.
Compared with prior art, the present invention utilizes the voice to wireless terminal to send and speech detection, by measuring two time points of speech samples signal before and after handling by wireless network, realization is to the accurate measurement of wireless network voice delay time, not only any change is not done by system, cooperate the employed terminal of test nor change, the what is more important testing equipment is routine office work instrument or daily necessities, not only simple to operate but also the test result error is little, be suitable for carrying out whenever and wherever possible, satisfy the needs of daily test.
Description of drawings
Fig. 1 is the voice delay time exploded view of communication system;
Fig. 2 is a network delay method of testing logic diagram in the specific embodiment of the invention;
Fig. 3 is the flow chart of a kind of network delay method of testing in the specific embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the invention is described further.
At first, people are decomposed by the sentient voice delay time of communication system.
As shown in Figure 1, people's ear under the normal condition sensible voice delay time comprised time delay t1 from sound source to caller wireless terminal microphone, the processing delay t2 of caller wireless terminal, communication system processing delay t3, called wireless terminal processing delay t4, the time delay t5 from called receiver to those who answer's ear.T3 is the system handles time delay that need obtain, the value of considering t1, t2, t4, t5 is generally all very little, and for example the earphone with wireless terminal calculates according to 1CM apart from the distance of ear, and the speed of sound is 340m/s, t1 and t5 can ignore fully less than 0.03MS.The processing delay t2 of caller wireless terminal and the processing delay t4 of called wireless terminal belong to the part of communication system, and value is very little, and the network delay of test gained comprises this part in the specific embodiment of the invention.
If by a kind of instrument, note the T1 moment that sound source is sounded, note the T2 moment that those who answer receives voice signal again.T2 is to the time difference of T1, just for needing the individual event voice delay time of investigation so.
The specific embodiment of the invention has used recording module to note speech samples former and later two moment point through the processing of wireless communication system, calculates the network delay of communication system.
As shown in Figure 2, after sound source is sounded, need to pay close attention to two transmission paths of speech samples.Article one, path, the speech samples solid black lines arrives recording module, and first that note that speech samples arrives be T1 constantly.Meanwhile, sound is along the black dotted lines path, and middle processing through wireless network arrives the caller wireless terminal, at last the moment T2 that is arrived by speech samples under the recording module collection.Should be noted that, same speech samples, recording module has recorded two moment that successively arrive, why second moment T2 is later than first T1 constantly, be exactly because the processing delay of wireless network communications system, the time difference between two moment is exactly the network delay of the wireless network finally asked.
In the middle of practical operation, what time followingly note:
The sound that sound source is sent is certain tight short clear, is convenient to have a speech samples clearly;
Sound source is short as far as possible apart from the distance of caller wireless terminal, be convenient to have one clearly speech samples import the caller wireless terminal into;
The distance of sound source recording distance module is short as far as possible, so that the following speech samples clearly without wireless network transmissions of record, and record moment T1;
Sound source should equate with the distance of sound source recording distance module apart from the distance of caller wireless terminal; Being described sound source equates with the distance on sound source recording distance ground apart from the distance of caller wireless terminal.
The distance of the earphone of recording ground and called wireless terminal is less than the distance of sound source with recording ground.
The earphone of called wireless terminal is close to the microphone of recording module, so that the following speech samples clearly of record, and record moment T2.
As shown in Figure 3, a kind of network delay method of testing may further comprise the steps:
Step 110, two wireless terminals of connection enter the state of communicating with each other;
Step 120, sound source are sent speech samples clearly;
Step 130, speech samples by handling without wireless network under the sound recordings, T1 constantly caught in record simultaneously;
Step 140, same speech samples by handling through wireless network under the sound recordings; T2 constantly caught in record simultaneously;
The same speech samples that earphone by called wireless terminal under the sound recordings sends, T2 constantly caught in record simultaneously.
The earphone of described called wireless terminal is pasting recording ground.
Step 150, measure the difference (being T2-T1) of described T2 and T1, obtain the time delay of the wireless network that will test.
A kind of network delay testing apparatus comprises caller wireless terminal, called wireless terminal, sound source module, recording module, wherein,
Sound source module is used to send speech samples clearly;
Recording module is used to write down speech samples, and the moment of speech samples caught in record simultaneously;
Connect two wireless terminals, sound source module sends speech samples clearly, and recording module is noted the speech samples of handling without wireless network, and T1 constantly caught in record simultaneously; Recording module is noted the same speech samples that the earphone of called wireless terminal sends, and T2 constantly caught in record simultaneously, and the difference that obtains T2 and T1 is the time delay of the wireless network that will test.
Recording module comprises microphone.
The distance of the described caller wireless terminal of described sound source module distance should equate with the distance of the described recording module of described sound source module distance.
The distance of the earphone of described recording module and called wireless terminal is less than the distance of sound source module and recording module.
The earphone of described called wireless terminal is pasting the microphone of recording module.
The method of the specific embodiment of the invention, not only any change is not done by system, cooperate the employed wireless terminal of test nor change, the what is more important testing equipment is routine office work instrument or daily necessities, not only simple to operate but also the test result error is little, be suitable for carrying out whenever and wherever possible, satisfy the needs of daily test.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with the people of this technology in the disclosed technical scope of the present invention; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (3)
1. a network delay method of testing is characterized in that, may further comprise the steps:
A, connection caller wireless terminal and called wireless terminal enter the state of communicating with each other;
After b, sound source were sent speech samples, by the speech samples of handling without wireless network under the sound recordings, T1 constantly caught in record simultaneously; Follow the same speech samples of handling through wireless network by under the sound recordings; T2 constantly caught in record simultaneously; Described sound source equates with the distance on sound source recording distance ground that apart from the distance of caller wireless terminal the earphone of described called wireless terminal is pasting recording ground;
C, measure the difference of described T2 and T1, i.e. T2-T1 obtains the time delay of the wireless network that will test, and the time delay of described wireless network comprises the processing delay of caller wireless terminal and the processing delay of called wireless terminal.
2. the method for claim 1 is characterized in that, among the described step b, is the same speech samples that the earphone of called wireless terminal sends by the same speech samples of handling through wireless network under the sound recordings.
3. a network delay testing apparatus comprises caller wireless terminal, called wireless terminal, it is characterized in that, also comprises sound source module, recording module, wherein,
Sound source module is used to send speech samples;
Recording module is used to write down speech samples, and the moment of speech samples caught in record simultaneously; Described recording module comprises microphone; The distance of the described caller wireless terminal of described sound source module distance equates that with the distance of the described recording module of described sound source module distance the earphone of described called wireless terminal is pasting the microphone of recording module;
Connect two wireless terminals, sound source module sends speech samples, and recording module is noted the speech samples of handling without wireless network, and T1 constantly caught in record simultaneously; Recording module is noted the same speech samples that the earphone of called wireless terminal sends, T2 constantly caught in record simultaneously, the difference that obtains T2 and T1 is the time delay of the wireless network that will test, and the time delay of described wireless network comprises the processing delay of caller wireless terminal and the processing delay of called wireless terminal.
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| CN2007101296934A CN101110654B (en) | 2007-08-17 | 2007-08-17 | Method and device for testing network delay time |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105071980A (en) * | 2015-07-13 | 2015-11-18 | 中国传媒大学 | Intercom voice communication delay measurement method |
| CN105472190A (en) * | 2015-11-13 | 2016-04-06 | 公安部第三研究所 | Audio signal time delay testing method |
| CN105450882B (en) * | 2015-11-13 | 2018-07-20 | 公安部第三研究所 | A kind of audio conversion characteristic test method |
| CN105933181B (en) * | 2016-04-29 | 2019-01-25 | 腾讯科技（深圳）有限公司 | A kind of call time delay appraisal procedure and device |
| CN108235426B (en) * | 2016-12-15 | 2021-01-15 | 中国移动通信有限公司研究院 | Method, device and system for detecting time delay and local time difference between terminals |
| CN109246664B (en) * | 2017-06-13 | 2021-07-23 | 上海大唐移动通信设备有限公司 | Voice test method and device |
| CN110300036A (en) * | 2019-06-25 | 2019-10-01 | 广州小鹏汽车科技有限公司 | Speech path network time-delay test method and test macro |
| CN110324566B (en) * | 2019-07-05 | 2020-12-25 | 苏州科达科技股份有限公司 | Method, device and equipment for testing sound delay in video conference |
| CN112737870B (en) * | 2019-10-29 | 2022-09-20 | 成都鼎桥通信技术有限公司 | System and method for testing time delay of MCPTT (Multi-chip PTT) service |
| CN112489686A (en) * | 2020-12-02 | 2021-03-12 | 公安部第三研究所 | End-to-end audio signal delay testing method |
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