CN103024768B - End-to-end videophone service quality evaluation method and system - Google Patents
End-to-end videophone service quality evaluation method and system Download PDFInfo
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Abstract
The invention discloses an end-to-end videophone service quality evaluation method and an end-to-end videophone service quality evaluation system, wherein the method comprises the following steps of: after the access of a mobile terminal into a mobile communication system, within a videophone quality evaluation time length, calculating wireless link parameters on a wireless link layer related to a videophone service quality by a wireless network side corresponding to uplink transmitting data; depending on the wireless link parameters and a service quality evaluation function, acquiring a videophone service quality score, and evaluating the videophone service quality depending on the videophone service quality score. By the end-to-end videophone service quality evaluation method and system disclosed by the invention, the wireless network side in the mobile communication system can objectively evaluate the quality of the videophone service by actively calculating the wireless link parameters and important wireless behaviors related to the videophone service quality, so that an important reference evidence is provided for optimization of the mobile communication network and for improvement of the videophone service quality.
Description
Technical field
The present invention relates to moving communicating field, in particular to a kind of end-to-end visual telephone service quality evaluation side
Method and system.
Background technology
At present, mobile communication carrier sets a series of KPI (Key Performance Indicators, key
Performance indications) index (being such as successfully accessed rate, cutting off rate), to the performance and quality of weighing mobile communications network.But only lead to
Cross KPI indexs to be often not enough to reflect sense of reality of the user to end-to-end business experience.And the sense of reality of user is visitor
The key factor of operator is selected at family, so as to being also key factor that operator is able to dominate the market.
Quality of experience evaluation of the user to end to end services, there is the methods such as subjective assessment and objective evaluation.
Wherein, the subjective evaluation method is that by inquiry subjective assessment of the user to business experience carrys out statistical service quality
Evaluation result.There is following defect in the method：Survey scope is limited, and evaluation procedure is loaded down with trivial details, and also cannot be to affecting quality of service
Problem positioned, with suitable limitation.
Secondly, the method for objectively evaluating without reference, can be without reference to original service data, can be in network side to big
Amount business carries out objective quality assessment, can also positioning effects quality link.
Videophone there is presently no for videophone quality as distinctive business in 3-G (Generation Three mobile communication system)
The technology for carrying out the objective evaluation without reference occurs.
The content of the invention
It is an object of the invention to provide a kind of end-to-end videophone service quality evaluation method and system, it can be carried
For one kind without reference to original service data, so as to realize that visual telephone service quality is evaluated.
In order to reach the purpose of the present invention, the present invention employs the following technical solutions realization：
A kind of end-to-end videophone service quality evaluation method, including：
After mobile terminal access mobile communication system, in videophone quality evaluation duration, wireless network side is for upper
Row sends data statisticss in the radio link layer radio link parameter related to visual telephone service quality；
According to the radio link parameter and evaluation the quality function acquisition visual telephone service quality score, and according to
According to the visual telephone service quality score assessment visual telephone service quality.
Preferably, the radio link parameter includes frame losing number, most long continuous frame losing number, and data dithering, the industry
Business quality evaluation functions be：
Visual telephone service quality score=f1 × frame losing numberα1+ f2 × most long continuous frame losing numberα2+ f3 × data ditheringα3+
Fbase, wherein,
Fbase is the benchmark score value of optimum quality of service, f1, f2 and f3 be respectively frame losing number, most long continuous frame losing number with
And the quality of service that causes of data dithering deteriorates metewand, α 1, α 2 and α 3 be respectively frame losing number, most long continuous frame losing number and
The assessment index that the quality of service that data dithering causes deteriorates.
A kind of end-to-end visual telephone service QA system, the system includes mobile terminal and wireless network control
Device processed, wherein,
Mobile terminal, for after access mobile communication system, sending upstream data；
Radio network controller, it is wireless for uplink data sending statistics in videophone quality evaluation duration
Network side is in the radio link layer radio link parameter related to visual telephone service quality；And, for according to described wireless
Link parameter and evaluation the quality function obtain visual telephone service quality score, and according to the visual telephone service quality
Score value assesses visual telephone service quality.
Preferably, the radio link parameter includes frame losing number, most long continuous frame losing number, and data dithering, the industry
Business quality evaluation functions be：
Visual telephone service quality score=f1 × frame losing numberα1+ f2 × most long continuous frame losing numberα2+ f3 × data ditheringα3+
Fbase, wherein,
Fbase is the benchmark score value of optimum quality of service, f1, f2 and f3 be respectively frame losing number, most long continuous frame losing number with
And the quality of service that causes of data dithering deteriorates metewand, α 1, α 2 and α 3 be respectively frame losing number, most long continuous frame losing number and
The assessment index that the quality of service that data dithering causes deteriorates.
A kind of end-to-end videophone service quality evaluation method, including：
After mobile terminal access mobile communication system, in videophone quality evaluation duration, wireless network side is directed to down
Row receiving data is counted in the radio link layer radio link parameter related to visual telephone service quality；
In videophone quality evaluation duration, radio network controller counts the mobile terminal and visual telephone service matter
The related important wireless behavior of amount；
Visual telephone service is obtained according to the radio link parameter, important wireless behavior and evaluation the quality function
Quality score, and according to the visual telephone service quality score assessment visual telephone service quality.
Preferably, the radio link parameter includes frame losing number, most long continuous frame losing number, and data dithering, wireless
Network side is got after the radio link parameter, is also included：
Radio network controller issues the periodicity Block Error Rate measurement control message of standard to mobile terminal, and mobile terminal is surveyed
The downlink space interface Block Error Rate of amount visual telephone service, and measurement result is reported into wireless network by the measurement report message of standard
Network controller.
It is further preferable that the important wireless behavior includes：Switching times, again with number of times and cell update number of times, institute
Stating evaluation the quality function is：
Visual telephone service quality score=f1 × equivalent frame losing numberα1+ f2 × most long continuous frame losing numberα2+ f3 × data are trembled
It is dynamicα3+ fbase,
Wherein, the computing formula of the equivalent frame losing number is：
Total frames received × Block Error Rate+switching times in equivalent frame losing number=frame losing number+videophone quality evaluation duration
The frame losing number+again that × switching causes is with number of times × again with losing that the frame losing number+cell update number of times × cell update for causing causes
Frame number；
Wherein, fbase is the benchmark score value of optimum quality of service, and f1, f2 and f3 are respectively frame losing number, most long continuous frame losing
The quality of service that number and data dithering cause deteriorates metewand, and α 1, α 2 and α 3 are respectively frame losing number, most long continuous frame losing number
And the assessment index that the quality of service that causes of data dithering deteriorates.
A kind of end-to-end visual telephone service QA system, the system includes mobile terminal and wireless network control
Device processed, wherein,
Mobile terminal, for after access mobile communication system, receiving the downlink data that radio network controller is issued；
Radio network controller, in videophone quality evaluation duration, for the downlink reception data statisticss
In the radio link layer radio link parameter related to visual telephone service quality；For in videophone quality evaluation duration
It is interior, count the mobile terminal important wireless behavior related to visual telephone service quality；And, for according to the radio chains
LUSHEN number, important wireless behavior and evaluation the quality function obtain visual telephone service quality score, and visual according to this
Telephone service quality score value assesses visual telephone service quality.
Preferably, the radio link parameter includes frame losing number, most long continuous frame losing number, and data dithering, wireless
Network side is got after the radio link parameter, and radio network controller to the periodicity that mobile terminal issues standard misses block
Rate measures control message, and mobile terminal measures the downlink space interface Block Error Rate of visual telephone service, and measurement result is passed through into standard
Measurement report message report radio network controller.
It is further preferable that the important wireless behavior includes：Switching times, again with number of times and cell update number of times, institute
Stating evaluation the quality function is：
Visual telephone service quality score=f1 × equivalent frame losing numberα1+ f2 × most long continuous frame losing numberα2+ f3 × data are trembled
It is dynamicα3+ fbase,
Wherein, the computing formula of the equivalent frame losing number is：
Total frames received × Block Error Rate+switching times in equivalent frame losing number=frame losing number+videophone quality evaluation duration
The frame losing number+again that × switching causes is with number of times × again with losing that the frame losing number+cell update number of times × cell update for causing causes
Frame number；
Wherein, fbase is the benchmark score value of optimum quality of service, and f1, f2 and f3 are respectively frame losing number, most long continuous frame losing
The quality of service that number and data dithering cause deteriorates metewand, and α 1, α 2 and α 3 are respectively frame losing number, most long continuous frame losing number
And the assessment index that the quality of service that causes of data dithering deteriorates.
The wireless network side that the technical scheme provided by the present invention can be seen that in mobile communication system is united by active
The meter radio link parameter related to visual telephone service quality and important wireless behavior, can go out videophone industry with objective evaluation
The quality of business, so as to provide important reference for mobile communication network optimization, visual telephone service increased quality.
Description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the present invention, this
Bright schematic description and description does not constitute inappropriate limitation of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 is the end-to-end videophone service quality evaluation method schematic flow sheet that the embodiment of the present invention 1 is provided；
Fig. 2 is the end-to-end videophone service quality evaluation method schematic flow sheet that the embodiment of the present invention 2 is provided；
Fig. 3 is end-to-end visual telephone service QA system structural representation provided in an embodiment of the present invention.
Specific embodiment
In order that the technical problem to be solved, technical scheme and beneficial effect are clearer, clear, below tie
Drawings and Examples are closed, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only
To explain the present invention, it is not intended to limit the present invention.
Embodiment 1
As shown in figure 1, a kind of end-to-end videophone service quality evaluation method is embodiments provided, the side
Method is comprised the following specific steps that：
After S100, mobile terminal access mobile communication system, in videophone quality evaluation duration, wireless network side pin
Uplink data sending is counted in the radio link layer radio link parameter related to visual telephone service quality；
S101, obtain visual telephone service quality point according to the radio link parameter and evaluation the quality function
Value, and according to the visual telephone service quality score assessment visual telephone service quality.
Under preferred implementation, the radio link parameter includes frame losing number, most long continuous frame losing number, and data are trembled
Dynamic, the evaluation the quality function is：
Visual telephone service quality score=f1 × frame losing numberα1+ f2 × most long continuous frame losing numberα2+ f3 × data ditheringα3+
Fbase, wherein,
Fbase is the benchmark score value of optimum quality of service, f1, f2 and f3 be respectively frame losing number, most long continuous frame losing number with
And the quality of service that causes of data dithering deteriorates metewand, α 1, α 2 and α 3 be respectively frame losing number, most long continuous frame losing number and
The assessment index that the quality of service that data dithering causes deteriorates.
Wherein, (mistake) frame number is lost for described：According to the characteristic of the stable transfer rate of videophone, can calculate visual
Telephony quality evaluates the frame number for expecting to send in duration, and, RNC (Radio Network Controller, wireless network control
Device processed) the actual correct frame number for sending of statistics, what both differences as sent data loses (mistake) frame number.
Most long (mistake) frame number is continuously lost for described：When the data that RNC discoveries send have loses (mistake) frame, that is, count continuous
Lose (mistake) frame number, and count in videophone quality evaluation duration most long continuously lose (mistake) frame number.
For the data dithering：(its measurement period is less than videophone to the actual frame number for sending data of periodic statistics
Quality evaluation duration).In multiple actual transmission data statisticss result in videophone quality evaluation duration, maximal and minmal value
Difference as data dithering statistical result.
In this embodiment, (mistake) frame number is lost due to the uplink data sending caused by important wireless behavior, body
Now in (mistake) frames statistic is lost, therefore the important wireless behavior of the visual telephone service need not be counted in the present embodiment.
Visual telephone service quality score is being obtained according to the evaluation the quality function, just can be according to the visual electricity
Call business quality score obtains visual telephone service quality, for example, in the present embodiment, the evaluation of the videophone quality of acquisition
Standard is table 1：
Table 1
Assume that the visual telephone service quality calculated by above-mentioned evaluation the quality function is 3.5, according to standards of grading,
The score value of the videophone quality is 3.5 points；If with videophone industry corresponding with the visual telephone service quality score
Business credit rating point is evaluated, then the grade score value of the videophone quality is 4, its final corresponding visual telephone service quality
It is clear for audio frequency.
The present embodiment additionally provides a kind of end-to-end visual telephone service QA system, as shown in figure 3, the system
Including mobile terminal 10 and radio network controller 20, wherein,
Mobile terminal 10, for after access mobile communication system, sending upstream data；
Radio network controller 20, in videophone quality evaluation duration, for uplink data sending nothing being counted
Line network side is in the radio link layer radio link parameter related to visual telephone service quality；And, for according to the nothing
Wired link parameter and evaluation the quality function obtain visual telephone service quality score, and according to the visual telephone service matter
Amount score value assessment visual telephone service quality.
Under preferred implementation, the radio link parameter includes frame losing number, most long continuous frame losing number, and data are trembled
Dynamic, the evaluation the quality function is：
Visual telephone service quality score=f1 × frame losing numberα1+ f2 × most long continuous frame losing numberα2+ f3 × data ditheringα3+
Fbase, wherein,
Fbase is the benchmark score value of optimum quality of service, f1, f2 and f3 be respectively frame losing number, most long continuous frame losing number with
And the quality of service that causes of data dithering deteriorates metewand, α 1, α 2 and α 3 be respectively frame losing number, most long continuous frame losing number and
The assessment index that the quality of service that data dithering causes deteriorates.
Embodiment 2
A kind of end-to-end videophone service quality evaluation method is this embodiment offers, as shown in Fig. 2 methods described bag
Include following concrete steps：
After S200, mobile terminal access mobile communication system, in videophone quality evaluation duration, wireless network side pin
To downlink reception data statisticss in the radio link layer radio link parameter related to visual telephone service quality；
S202, in videophone quality evaluation duration, radio network controller counts the mobile terminal and videophone
The related important wireless behavior of quality of service；
S203, obtain visual electricity according to the radio link parameter, important wireless behavior and evaluation the quality function
Call business quality score, and according to the visual telephone service quality score assessment visual telephone service quality.
Under preferred implementation, the radio link parameter includes frame losing number, most long continuous frame losing number, and data are trembled
It is dynamic, after wireless network side gets the radio link parameter, also include：
S201, radio network controller issue the periodicity Block Error Rate measurement control message of standard to mobile terminal, mobile
Terminal measures the downlink space interface Block Error Rate of visual telephone service, and measurement result is reported by the measurement report message of standard
Radio network controller.
Wherein, (mistake) frame number is lost for described：According to the characteristic of the stable transfer rate of videophone, can calculate visual
Telephony quality evaluates the frame number for expecting to send in duration, and, RNC (Radio Network Controller, wireless network control
Device processed) the actual correct frame number for sending of statistics, what both differences as sent data loses (mistake) frame number.
Most long (mistake) frame number is continuously lost for described：When the data that RNC discoveries send have loses (mistake) frame, that is, count continuous
Lose (mistake) frame number, and count in videophone quality evaluation duration most long continuously lose (mistake) frame number.
For the data dithering：(its measurement period is less than videophone to the actual frame number for sending data of periodic statistics
Quality evaluation duration).In multiple actual transmission data statisticss result in videophone quality evaluation duration, maximal and minmal value
Difference as data dithering statistical result.
Under the embodiment being more highly preferred to, the important wireless behavior includes：Switching times, again with number of times and cell more
New number of times, the evaluation the quality function is：
Visual telephone service quality score=f1 × equivalent frame losing numberα1+ f2 × most long continuous frame losing numberα2+ f3 × data are trembled
It is dynamicα3+ fbase,
Wherein, the computing formula of the equivalent frame losing number is：
Total frames received × Block Error Rate+switching times in equivalent frame losing number=frame losing number+videophone quality evaluation duration
The frame losing number+again that × switching causes is with number of times × again with losing that the frame losing number+cell update number of times × cell update for causing causes
Frame number；
Wherein, fbase is the benchmark score value of optimum quality of service, and f1, f2 and f3 are respectively frame losing number, most long continuous frame losing
The quality of service that number and data dithering cause deteriorates metewand, and α 1, α 2 and α 3 are respectively frame losing number, most long continuous frame losing number
And the assessment index that the quality of service that causes of data dithering deteriorates.In addition, switching cause frame losing number, again with the frame losing that causes
Number, the frame losing number that causes of cell update are configuration parameter, switch, match somebody with somebody again for assessment, these wireless behaviors such as cell update are drawn
The deterioration of the visual telephone service quality for rising.
After visual telephone service quality score is obtained according to the evaluation the quality function, just can be visual according to this
Telephone service quality score value obtains visual telephone service quality, and for example, in the present embodiment, the videophone quality of acquisition is commented
It is table 2 that price card is accurate：
Table 2
Assume that the visual telephone service quality score calculated by above-mentioned evaluation the quality function is 2.7, according to scoring
Standard, the score value of the visual telephone service quality is 2.7 points；If with it is corresponding with the visual telephone service quality score can
Phonovision quality of service ranking score is evaluated, then the visual telephone service credit rating score value is 3, its corresponding visual telephone service
Quality is that audio frequency is more clear.
The embodiment of the present invention additionally provides a kind of end-to-end visual telephone service QA system, referring again to Fig. 3, institute
System is stated including mobile terminal 10 and radio network controller 20, wherein,
Mobile terminal 10, for after access mobile communication system, receiving the lower line number that radio network controller 20 is issued
According to；
Radio network controller 20, in videophone quality evaluation duration, for downlink reception data system
Meter is in the radio link layer radio link parameter related to visual telephone service quality；For in videophone quality evaluation duration
It is interior, count the mobile terminal important wireless behavior related to visual telephone service quality；And, for according to the radio chains
LUSHEN number, important wireless behavior and evaluation the quality function obtain visual telephone service quality score, and visual according to this
Telephone service quality score value assesses visual telephone service quality.
Under preferred implementation, the radio link parameter includes frame losing number, most long continuous frame losing number, and data are trembled
Dynamic, after wireless network side gets the radio link parameter, radio network controller to mobile terminal issues standard
Periodicity Block Error Rate measures control message, and mobile terminal measures the downlink space interface Block Error Rate of visual telephone service, and measurement is tied
Fruit reports radio network controller by the measurement report message of standard.
Under the embodiment being more highly preferred to, the important wireless behavior includes：Switching times, again with number of times and cell more
New number of times, the evaluation the quality function is：
Visual telephone service quality score=f1 × equivalent frame losing numberα1+ f2 × most long continuous frame losing numberα2+ f3 × data are trembled
It is dynamicα3+ fbase,
Wherein, the computing formula of the equivalent frame losing number is：
Total frames received × Block Error Rate+switching times in equivalent frame losing number=frame losing number+videophone quality evaluation duration
The frame losing number+again that × switching causes is with number of times × again with losing that the frame losing number+cell update number of times × cell update for causing causes
Frame number；
Wherein, fbase is the benchmark score value of optimum quality of service, and f1, f2 and f3 are respectively frame losing number, most long continuous frame losing
The quality of service that number and data dithering cause deteriorates metewand, and α 1, α 2 and α 3 are respectively frame losing number, most long continuous frame losing number
And the assessment index that the quality of service that causes of data dithering deteriorates.Described above illustrates and describes one of the present invention preferably
Embodiment, but as previously mentioned, it should be understood that the present invention is not limited to form disclosed herein, is not to be taken as to other realities
The exclusion of example is applied, and can be used for various other combinations, modification and environment, and can be led in invention contemplated scope described herein
The technology or knowledge for crossing above-mentioned teaching or association area is modified.And change that those skilled in the art are carried out and change without departing from
The spirit and scope of the present invention, then all should be in the protection domain of claims of the present invention.
Claims (4)
1. a kind of end-to-end videophone service quality evaluation method, it is characterised in that include：
After mobile terminal access mobile communication system, in videophone quality evaluation duration, wireless network side is directed to up
Data statisticss are sent in the radio link layer radio link parameter related to visual telephone service quality；
Visual telephone service quality score is obtained according to the radio link parameter and evaluation the quality function, and foundation should
Visual telephone service quality score assesses visual telephone service quality；
Wherein, the radio link parameter includes frame losing number, most long continuous frame losing number, and data dithering, the quality of service
Valuation functions are：
Visual telephone service quality score=f1 × frame losing numberα1+ f2 × most long continuous frame losing numberα2+ f3 × data ditheringα3+
Fbase, wherein,
Fbase is the benchmark score value of optimum quality of service, and f1, f2 and f3 are respectively frame losing number, most long continuous frame losing number and number
The quality of service caused according to shake deteriorates metewand, and α 1, α 2 and α 3 are respectively frame losing number, most long continuous frame losing number and data
The assessment index that the quality of service that shake causes deteriorates.
2. a kind of end-to-end visual telephone service QA system, it is characterised in that the system include mobile terminal and
Radio network controller, wherein,
Mobile terminal, for after access mobile communication system, sending upstream data；
Radio network controller, in videophone quality evaluation duration, for uplink data sending wireless network being counted
Side is in the radio link layer radio link parameter related to visual telephone service quality；And, for according to the wireless link
Parameter and evaluation the quality function obtain visual telephone service quality score, and according to the visual telephone service quality score
Assessment visual telephone service quality；
Wherein, the radio link parameter includes frame losing number, most long continuous frame losing number, and data dithering, the quality of service
Valuation functions are：
Visual telephone service quality score=f1 × frame losing numberα1+ f2 × most long continuous frame losing numberα2+ f3 × data ditheringα3+
Fbase, wherein,
Fbase is the benchmark score value of optimum quality of service, and f1, f2 and f3 are respectively frame losing number, most long continuous frame losing number and number
The quality of service caused according to shake deteriorates metewand, and α 1, α 2 and α 3 are respectively frame losing number, most long continuous frame losing number and data
The assessment index that the quality of service that shake causes deteriorates.
3. a kind of end-to-end videophone service quality evaluation method, it is characterised in that include：
After mobile terminal access mobile communication system, in videophone quality evaluation duration, wireless network side connects for descending
Data statisticss are received in the radio link layer radio link parameter related to visual telephone service quality；
In videophone quality evaluation duration, radio network controller counts the mobile terminal with visual telephone service quality phase
The important wireless behavior closed；
Visual telephone service quality is obtained according to the radio link parameter, important wireless behavior and evaluation the quality function
Score value, and according to the visual telephone service quality score assessment visual telephone service quality；
Wherein, the radio link parameter includes frame losing number, most long continuous frame losing number, and data dithering, in wireless network side
After getting the radio link parameter, also include：
Radio network controller issues the periodicity Block Error Rate measurement control message of standard to mobile terminal, and mobile terminal measurement can
The downlink space interface Block Error Rate of phonovision business, and measurement result is reported into wireless network control by the measurement report message of standard
Device processed；
The important wireless behavior includes：Switching times, again with number of times and cell update number of times, the evaluation the quality letter
Number is：
Visual telephone service quality score=f1 × equivalent frame losing numberα1+ f2 × most long continuous frame losing numberα2+ f3 × data ditheringα3+
Fbase,
Wherein, the computing formula of the equivalent frame losing number is：
Total frames received × Block Error Rate+switching times in equivalent frame losing number=frame losing number+videophone quality evaluation duration × cut
Change the frame losing number of the frame losing number that causes+again with number of times × cause with the frame losing number+cell update number of times × cell update for causing again；
Wherein, fbase is the benchmark score value of optimum quality of service, f1, f2 and f3 be respectively frame losing number, most long continuous frame losing number with
And the quality of service that causes of data dithering deteriorates metewand, α 1, α 2 and α 3 be respectively frame losing number, most long continuous frame losing number and
The assessment index that the quality of service that data dithering causes deteriorates.
4. a kind of end-to-end visual telephone service QA system, it is characterised in that the system include mobile terminal and
Radio network controller, wherein,
Mobile terminal, for after access mobile communication system, receiving the downlink data that radio network controller is issued；
Radio network controller, in videophone quality evaluation duration, for the downlink reception data statisticss in nothing
The link-layer radio link parameter related to visual telephone service quality；For in videophone quality evaluation duration, uniting
Count the mobile terminal important wireless behavior related to visual telephone service quality；And, for according to the radio chains LUSHEN
Several, important wireless behavior and evaluation the quality function obtain visual telephone service quality score, and according to the videophone
Quality of service score value assesses visual telephone service quality；
Wherein, the radio link parameter includes frame losing number, most long continuous frame losing number, and data dithering, in wireless network side
After getting the radio link parameter, radio network controller issues the periodicity Block Error Rate measurement of standard to mobile terminal
Control message, mobile terminal measures the downlink space interface Block Error Rate of visual telephone service, and the measurement that measurement result is passed through into standard
Report message reports radio network controller；
The important wireless behavior includes：Switching times, again with number of times and cell update number of times, the evaluation the quality letter
Number is：
Visual telephone service quality score=f1 × equivalent frame losing numberα1+ f2 × most long continuous frame losing numberα2+ f3 × data ditheringα3+
Fbase,
Wherein, the computing formula of the equivalent frame losing number is：
Total frames received × Block Error Rate+switching times in equivalent frame losing number=frame losing number+videophone quality evaluation duration × cut
Change the frame losing number of the frame losing number that causes+again with number of times × cause with the frame losing number+cell update number of times × cell update for causing again；
Wherein, fbase is the benchmark score value of optimum quality of service, f1, f2 and f3 be respectively frame losing number, most long continuous frame losing number with
And the quality of service that causes of data dithering deteriorates metewand, α 1, α 2 and α 3 be respectively frame losing number, most long continuous frame losing number and
The assessment index that the quality of service that data dithering causes deteriorates.
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