CN1497901A - Method for estimating service quality of communication link through network - Google Patents
Method for estimating service quality of communication link through network Download PDFInfo
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- CN1497901A CN1497901A CNA2003101017020A CN200310101702A CN1497901A CN 1497901 A CN1497901 A CN 1497901A CN A2003101017020 A CNA2003101017020 A CN A2003101017020A CN 200310101702 A CN200310101702 A CN 200310101702A CN 1497901 A CN1497901 A CN 1497901A
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Abstract
The present invention concerns a method for evaluating and/or controlling the quality of service of a telecommunication link via a network. Method wherein it consists in performing the following operations: determination of the edge equipment, determination of the impairments introduced by the various pieces of equipment or hardware involved in the concerned telecommunication link, real time measurement of delay and packet loss in relation with said telecommunication link, real time measurement of noise in relation with said telecommunication link, and then computing the values of the foregoing determined or measured parameters and factors to provide an indicator, preferably a numerical indicator, representative of the quality of service perceived by the user(s) of said telecommunication link.
Description
Technical field
The present invention relates to field of telecommunication networks, exactly, the present invention relates to assess the quality of this communication, and a kind of method of assessing and/or controlling the service quality of this communication link.
Background technology
For client and provider, service quality (QoS) all is an important problem, especially in the network field that transmits speech (VoIP) by Internet protocol.
For example, must monitor the service quality that offers the client by voip network, thereby realize:
-detect the quality that occurs because of network load condition or fault to descend;
-at consulting QoS, be evaluated at line mass (when creating service or at each, call out and carry out)
-support is based on the charging of QoS.
For QoS is provided indication, some schemes have been proposed, these schemes are based on LAN (local area network (LAN)) specific indexes that basic structure provided (for example postponing and packet loss).
But, when the index that is provided when LAN basic structure is used to limit LAN itself, the QoS of the VoIP service that they just can't representative of consumer be experienced.
This situation can illustrate by following two examples.
On the one hand, it is a kind of very bad situation that 3% packet loss is arranged on the LAN, can infer that to the simple measurement of LAN index QoS can't accept.In fact, when this situation occurs in following time of condition based on the IP phone of G711 PLC (packet loss concealment), the MOS that experiences is 4.1, and this is fairly good.
On the other hand, can cause the MOS value in the random packet loss of G723.1 and VAD (voice activation detection) last 1% is 2.9, and this can't accept.
People propose to utilize former index to come the estimation of calculated mass indication, for example well-known MOS (average ratings branch) and the R factor (referring to the example of WO 01/080492).
But even in a kind of scheme in back, when carrying out the indication of described quality and calculate, some critical components and the factor still are not taken into account, and are not perhaps taken into full account at least.
The objective of the invention is to overcome these restrictions.
Summary of the invention
Therefore, the present invention relates to a kind of assessment and/or control communication link by network, a kind of method of the service quality of the VoIP link between two terminals especially, this method comprises carries out following operation:
-determine marginal equipment,
-determine the impairment that various device that this communication link is related or hardware are introduced,
-measure delay and packet loss in real time at described communication link,
-measure noise in real time at described communication link,
Calculate the aforementioned parameter of determining or measuring and the value of the factor subsequently, so that an indicating device to be provided, digital indicator has preferably been represented the service quality that the user experienced of described communication link.
Description of drawings
Following description taken in conjunction accompanying schematic figure has been explained the preferred implementation of the present invention as non-limitative example, thereby makes the present invention be easier to understand.
The schematic diagram of Fig. 1 has been summed up under VoIP communication link situation, the impairment that network and terminal are introduced and to the influence of service quality.
Fig. 2 is exemplary to illustrate typical VoIP communication link, and realizes the schematic diagram according to a kind of instrument of method of the present invention.
Embodiment
Calculate with a kind of limit of having carried out the indicating device of representing service quality according to innovative approach of the present invention illustrated in the accompanying drawings as previously mentioned, this indicating device is based on so-called Emodel, and is made of the relevant parameter of indication.
The described indicating device that calculates can for example be made of MOS, and the computational methods of MOS have been well-known in the prior art.
The measurement of delay and packet loss is finished by marginal equipment.Limit equipment can be terminal itself, if this terminal is the ethernet type terminal, and the soft phone on Ethernet Phone or the PC for example.In addition, marginal equipment also can be the gateway between IP and the circuit-mode, and the standard telecommunication telephone that is connected to this gateway.In general, marginal equipment is compatible and place the equipment at IP network edge with IP network.This just marginal equipment can send needed about the delay of ongoing communication and the information of packet loss.The impairment that the equipment that relates to (hardware or software) is introduced can obtain in the perhaps similar storage device from comprising the storehouse of the information (for example codec type, echo control, noise or similar information) that may relate to equipment.
For the purpose of the present invention, determine that clearly marginal equipment is extremely important.Determine marginal equipment with different may communicate by letter irrelevant.In case by utilizing for example telephone number or MAC/IP addressee, clearly determined to be connected to the marginal equipment that private branch exchange and this time signal post relate to, just can determine that this terminal is which kind of type (for example soft phone on POT, specific analog/digital terminal, IP phone, the PC) by watching certain file of having stored allocation list.This table is the mapping of a kind of network configuration of finishing of certain system operator.In case determined terminal type well, just must utilize all relevant informations of different terminals type in certain database, for example the sidetone level of masking, the listener sidetone level of masking, reception loudness level, transmission loudness level, average one-way latency, the equipment impairment factor, QDU quantizing distortion unit, calling party's echo loudness level, the expection factor (advantage factor) ...
In case determined local communication terminal, just can be in the same manner, the telecommunication terminal information of utilizing certain IP terminal or gateway to visit is determined the characteristic of this terminal.May utilize certain SIP or equivalent protocols to set up certain preproduction phase of communication, these information are being collected on IP terminal or the gateway---and the latter uses under the situation of IP terminal.
More favourable a kind of way is, utilizes detector, preferably utilizes near the detector one of the end of related communication link to carry out noise testing.Like this, the centralized calculation that noise testing itself is calculated based on operation parameter, for example calculating of describing in the vad algorithm.
The innovation method can produce an incident, for example network, perhaps alarm of the business load of at least a portion of described network or action automatically when quality-of-service indicators is lower than or reach predefined acceptable minimum value.
If impossible, perhaps do not wish to carry out real-time analysis, can plan record under with the relevant one or more quality-of-service indicators values of considering that calculate of communication link, and after described link disappearance, in follow-up QoS analytic process, analyze.
According to first execution mode of the present invention,, just call out one by one and implement QoS assessment and/or control method automatically each calling.
According to second execution mode, this innovative approach is implemented automatically or when requiring at the specific communications route, can implement once, several times or implement with repetitive mode.
According to the 3rd execution mode, this innovative approach is implemented when requiring, to realize to subnetwork for example diagnosis of a port or a node.
Can take into full account all relevant parameters and the factor that influences QoS according to method of the present invention, especially shake and postpone/packet loss background noise and end-to-end delay.
Because the queuing in the LAN parts can influence passing through the time of grouping, the VoIP of equipment (IP phone, gateway) has comprised a wobble buffer.This wobble buffer can increase some delays, but because postpone to have caused the voice signal quality to descend, it is normally limited, this means that the shake of increase may cause packet loss.Just when LAN obtains index, the situation that this packet loss is lost whole group is disadvantageous, but can utilize the present invention to handle.
Background noise is the key element of the MOS that experiences, therefore, need pay attention in calculating (and measurement).
At last, end-to-end delay is correlation factor of calculating the MOS or the R factor, and the delay that records in LAN inside is too limited.The measurement of the real time delay that the present invention carried out is based on mechanism in a kind of band that brings significant improvement.
The invention still further relates to and a kind ofly assess and/or control communication link by network as Fig. 2 being used to shown in the part, especially a kind of measurement and the assessment tool of the service quality of the VoIP link between two terminals, this instrument is characterised in that it comprises the device that can carry out following operation:
-determine marginal equipment,
-determine the impairment that various device that this communication link is related or hardware are introduced,
-measure delay and packet loss in real time at described communication link,
And calculation element, this calculation element can provide a digital indicator based on the aforementioned parameter and the factor of determining or measuring, and has represented the relevant service quality of described communication link.
According to a specific character of the present invention, described instrument comprises a noise measurement probe, also comprise with comprising communication link and set up the storehouse or the similar memory device of the information that may relate to equipment or hardware in the process and set up communicating devices, and comprise and to set up communicating devices with at least one terminal in two terminals of described communication link.
The present invention is not subject to description here certainly and by the preferred implementation shown in the accompanying drawing, under the situation that does not depart from the scope of the invention, can changes or use mode of equal value.
Claims (10)
1. the method for the service quality of the VoIP link between assessment and/or the communication link of control by network, especially two terminals is characterized in that this method comprises carries out following operation:
-determine marginal equipment,
-determine the impairment that various device that this communication link is related or hardware are introduced,
-measure delay and packet loss in real time at described communication link,
-measure noise in real time at described communication link,
Calculate the aforementioned parameter of determining or measuring and the value of the factor subsequently, so that an indicating device to be provided, digital indicator has preferably been represented the service quality that the user experienced of described communication link.
2. according to the method for claim 1, it is characterized in that marginal equipment provides the measurement of delay and packet loss, its feature also is, the impairment that equipment that relates to or hardware are introduced can obtain in the perhaps similar storage device from comprising the storehouse of the information that may relate to equipment.
3. according to method any in claim 1 and 2, it is characterized in that, utilize detector, preferably utilize near the detector one of the end of the communication link relate to carry out noise testing.
4. according to method any in the claim 1 to 3, it is characterized in that, when quality-of-service indicators is lower than or reach predefined acceptable minimum value, produce an incident automatically, for example network, perhaps alarm of the business load of at least a portion of described network or action.
5. according to method any in the claim 1 to 4, it is characterized in that, note the one or more quality-of-service indicators values that calculate relevant, and after described link disappears, analyze with the communication link of considering.
6. according to method any in the claim 1 to 5, it is characterized in that, each is called out this method of implementing automatically.
7. according to method any in the claim 1 to 5, it is characterized in that this method is implemented automatically or when requiring at the specific communications route, can implement once, several times or implement with repetitive mode.
8. according to method any in the claim 1 to 5, it is characterized in that this method is implemented when requiring, to realize to subnetwork for example diagnosis of a port or a node.
9. the measurement and the assessment tool of the service quality of the VoIP link between communication link that is used to assess and/or control by network, especially two terminals is characterized in that it comprises the device that can carry out following operation:
-determine marginal equipment,
-determine the impairment that various device that this communication link is related or hardware are introduced,
-measure delay and packet loss in real time at described communication link,
And calculation element, this calculation element can provide a digital indicator based on the aforementioned parameter and the factor of determining or measuring, and has represented the relevant service quality of described communication link.
10. measurement according to claim 9 and assessment tool, it is characterized in that, this instrument comprises a noise measurement probe, also comprise with comprising communication link and set up the storehouse or the similar memory device of the information that may relate to equipment or hardware in the process and set up communicating devices, and comprise and to set up communicating devices with at least one terminal in two terminals of described communication link.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2003101017020A CN1497901A (en) | 2002-10-22 | 2003-10-21 | Method for estimating service quality of communication link through network |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP02360290.7 | 2002-10-22 | ||
| CNA2003101017020A CN1497901A (en) | 2002-10-22 | 2003-10-21 | Method for estimating service quality of communication link through network |
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| CN1497901A true CN1497901A (en) | 2004-05-19 |
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| CNA2003101017020A Pending CN1497901A (en) | 2002-10-22 | 2003-10-21 | Method for estimating service quality of communication link through network |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007025427A1 (en) * | 2005-08-31 | 2007-03-08 | Huawei Technologies Co., Ltd. | A method for getting the link estimating parameters |
| CN100466560C (en) * | 2006-03-15 | 2009-03-04 | 华为技术有限公司 | Method, system, device for detecting service quality, and charging and fault detecting system |
| WO2009030146A1 (en) * | 2007-08-28 | 2009-03-12 | Hanmin Yang | Method for expressing the communication quality of a network telephone |
| CN100563179C (en) * | 2007-03-09 | 2009-11-25 | 杭州中导科技开发有限公司 | Ethernet Private Line method of real-time and monitoring equipment thereof |
| CN101227340B (en) * | 2007-01-17 | 2010-09-22 | 中国电信股份有限公司 | Embedded type network quality detecting device and method and evaluation system and evaluation method thereof |
| CN103098418A (en) * | 2010-09-10 | 2013-05-08 | 阿尔卡特朗讯 | Method of enabling a packet loss measurement in a packet transport network |
| CN104104545A (en) * | 2014-07-22 | 2014-10-15 | 浪潮(北京)电子信息产业有限公司 | Method, device and system for evaluating service quality of CSPs |
-
2003
- 2003-10-21 CN CNA2003101017020A patent/CN1497901A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007025427A1 (en) * | 2005-08-31 | 2007-03-08 | Huawei Technologies Co., Ltd. | A method for getting the link estimating parameters |
| CN100466560C (en) * | 2006-03-15 | 2009-03-04 | 华为技术有限公司 | Method, system, device for detecting service quality, and charging and fault detecting system |
| CN101227340B (en) * | 2007-01-17 | 2010-09-22 | 中国电信股份有限公司 | Embedded type network quality detecting device and method and evaluation system and evaluation method thereof |
| CN100563179C (en) * | 2007-03-09 | 2009-11-25 | 杭州中导科技开发有限公司 | Ethernet Private Line method of real-time and monitoring equipment thereof |
| WO2009030146A1 (en) * | 2007-08-28 | 2009-03-12 | Hanmin Yang | Method for expressing the communication quality of a network telephone |
| CN103098418A (en) * | 2010-09-10 | 2013-05-08 | 阿尔卡特朗讯 | Method of enabling a packet loss measurement in a packet transport network |
| CN103098418B (en) * | 2010-09-10 | 2015-06-03 | 阿尔卡特朗讯 | Method of enabling a packet loss measurement in a packet transport network |
| CN104104545A (en) * | 2014-07-22 | 2014-10-15 | 浪潮(北京)电子信息产业有限公司 | Method, device and system for evaluating service quality of CSPs |
| CN104104545B (en) * | 2014-07-22 | 2017-10-03 | 浪潮(北京)电子信息产业有限公司 | A kind of method of assessment CSP service quality, apparatus and system |
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