CN102624712A - Method for optimizing quality of service of wireless streaming media and device - Google Patents

Method for optimizing quality of service of wireless streaming media and device Download PDF

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Publication number
CN102624712A
CN102624712A CN2012100475919A CN201210047591A CN102624712A CN 102624712 A CN102624712 A CN 102624712A CN 2012100475919 A CN2012100475919 A CN 2012100475919A CN 201210047591 A CN201210047591 A CN 201210047591A CN 102624712 A CN102624712 A CN 102624712A
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China
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user terminal
streaming media
score value
network equipment
bandwidth
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CN2012100475919A
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Chinese (zh)
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CN102624712B (en
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刘澎源
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大唐移动通信设备有限公司
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Abstract

The invention discloses a method for optimizing quality of service of a wireless streaming medium and a device. The method for optimizing the quality of the service of the wireless streaming medium is applied to a long term evolution (LTE) system and includes that network-side equipment receives a wireless streaming media playing request sent by a user terminal; the network-side equipment confirms a video source bit rate of the wireless streaming media requested to play according to the received wireless streaming media playing request and distributes band width for the user terminal according to the video source bit rate; and when the network-side equipment receives the value of mean opinion score (MOS) of the streaming media fed back by the user terminal, the network-side equipment adjusts the band width of the user terminal according to the value of the MOS of the streaming media. According to the method for optimizing the quality of service of the wireless streaming media and the device, the LTE band width distribution is reasonable, the LTE band width resource waste is reduced, and simultaneously the MOS of the wireless streaming media is guaranteed.

Description

A kind of method and apparatus of optimizing wireless flow media service quality

Technical field

The present invention relates to wireless communication technology field, relate in particular to a kind of method and apparatus of optimizing wireless flow media service quality.

Background technology

Along with developing rapidly of wireless technology, wireless network and traditional mobile radio communication have all become the important component part of Internet.Use as new-type network, streaming media service will be the chief component in the GSM (3G (3G (Third Generation) Moblie), B3G (ultra 3 g mobile communication), 4G (the 4th third-generation mobile communication)).

Because Internet is a kind of network of the type of doing one's best, it can only not provide any QoS (Quality of Service, service quality) to guarantee to application for upper layer application provides the single transmission service of doing one's best.In addition, the problem that exists in the wireless network environments such as mobility at the limited and dynamic change of the bandwidth resources of the packet loss that wireless channel is high and the error rate, wireless network, terminal all can cause bigger influence to the quality of wireless flow media.

The QoS of prior wireless network guarantees that mechanism is main and adopts adaptive streaming media transmission technique, and promptly the quality according to the change dynamics adjustment medium of network state makes it to be complementary with network state.Existing rate controlled model can be divided into following two types: based on the rate controlled of transmitting terminal with based on the rate controlled of receiving terminal.Wherein:

Code check adaptation technique (based on transmitting terminal): perhaps be the basis with network, dynamically adjust the mobile flow medium communication flows with each user.Transmitting terminal mainly is responsible for adjustment speed, and the feedback information that provides according to receiving terminal or network is dynamically adjusted the transmission rate in streaming media service source, reaches best bandwidth availability ratio.

Channel adjustment technology (based on receiving terminal): receiving terminal is through increasing and reduce the audio rate of looking that channel is adjusted reception.Generally, the rate controlled based on receiving terminal is used in the scalability video-voice frequency flow transmission of multicast.Wherein, scalable video-voice frequency flow is meant that media file forms by several layers, in the process of Streaming Media transmission, and the corresponding channel of layer.

The QoS of prior wireless network guarantees that mechanism just makes it to be complementary with network state according to the quality of the change dynamics adjustment medium of network state, and it alleviates offered load through reducing media delivery speed method, has reduced video quality.

Summary of the invention

The embodiment of the invention provides a kind of method and apparatus of optimizing wireless flow media service quality, so that the LTE allocated bandwidth is more reasonable, when reducing the waste of LTE bandwidth resources, guarantees wireless flow media MOS.

In order to reach above purpose, the embodiment of the invention provides a kind of method of optimizing wireless flow media service quality, is applied to Long Term Evolution LTE system, and this method comprises:

Network equipment receives the wireless flow media playing request that user terminal sends;

Said network equipment confirms that according to the wireless flow media playing request that receives institute ask the film source code check of the wireless flow media of broadcast, and is said user terminal distribution bandwidth according to said film source code check;

When network equipment received the average subjective score MOS score value of the Streaming Media of user terminal feedback, said network equipment was adjusted the bandwidth of this user terminal according to this Streaming Media MOS score value.

The embodiment of the invention also provides a kind of network equipment, is applied to Long Term Evolution LTE system, it is characterized in that this network equipment comprises:

Receiver module is used to receive the wireless flow media playing request that user terminal sends;

Determination module, the wireless flow media playing request that is used for receiving according to said receiver module is confirmed the film source code check of the wireless flow media of broadcast of asking;

Bandwidth allocation module, being used for according to the film source code check that said determination module is confirmed is that said user terminal distributes bandwidth;

The bandwidth adjusting module is used for when said receiver module receives the average subjective score MOS score value of the Streaming Media of user terminal feedback, according to the Streaming Media MOS score value that receives the bandwidth of this user terminal being adjusted.

 

In the above embodiment of the present invention, network equipment is confirmed the film source code check according to the wireless flow media playing request that receives, and is that user terminal distributes bandwidth according to this film source code check; Receive Streaming Media MOS (the Mean Opinion Score of user terminal feedback when network equipment; Average subjective score) during score value; Network equipment is adjusted the bandwidth of this user terminal according to this Streaming Media MOS score value; Make the LTE allocated bandwidth more reasonable, when reducing the waste of LTE bandwidth resources, guaranteed wireless flow media MOS.

Description of drawings

A kind of method flow sketch map of optimizing wireless flow media service quality that Fig. 1 provides for the embodiment of the invention;

The structural representation of a kind of network equipment that Fig. 2 provides for the embodiment of the invention.

Embodiment

The embodiment of the invention provides a kind of technical scheme of optimizing wireless flow media service quality; Be applied in the LTE system; In this technical scheme, network equipment is confirmed the film source code check according to the wireless flow media playing request that receives, and is that user terminal distributes bandwidth according to this film source code check; When network equipment receives the Streaming Media MOS score value of user terminal feedback; Network equipment is adjusted the bandwidth of this user terminal according to this Streaming Media MOS score value; Make the LTE allocated bandwidth more reasonable, when reducing the waste of LTE bandwidth resources, guaranteed wireless flow media MOS.Wherein, this wireless flow media comprises audio frequency or/and video.

To combine the accompanying drawing among the application below, the technical scheme among the application is carried out clear, complete description, obviously, described embodiment is a part of embodiment of the application, rather than whole embodiment.Based on the embodiment among the application, the every other embodiment that those of ordinary skills are obtained under the prerequisite of not making creative work belongs to the scope that the application protects.

As shown in Figure 1, a kind of method flow sketch map of optimizing wireless flow media service quality for the embodiment of the invention provides can may further comprise the steps:

Step 101, network equipment receive the wireless flow media playing request that user terminal sends.

Concrete; In this embodiment; With the wireless flow media is that video is that example is described; When the user wants onlinely when watching video, the user can send corresponding video playback request through the user terminal at place to network equipment, the relevant information (like video name) of the video that the request of carrying in this video playback request is play.

Step 102, network equipment are confirmed the film source code check according to the wireless flow media playing request that receives.

Concrete, after network equipment receives the video playback request that user terminal sends, can confirm that user terminal ask the video of broadcast according to this video playback request, and and then the film source code check of definite this video.

In video display process, film source is a principal element that directly influences user's subjective feeling.Aspect the film source selection, the factor that consider mainly comprises code check and coded system (VBR or CBR) of video flowing etc.

Wherein, existing files in stream media coded system mainly can comprise VBR (Variable Bit Rate, dynamic bit rate) mode and CBR (Constant Bit Rate, static bit rates) mode.The VBR mode encode obtain be the files in stream media of variable bit rate, the bandwidth of the required distribution of network has bigger fluctuation in transmission course; The CBR mode encode obtain be the files in stream media of constant code rate.Therefore, in wireless network transmissions, adopt the CBR mode to encode usually.

The code check of considering video flowing is big more, and corresponding M OS is just high more.Therefore, in order to obtain higher-quality video file, can improve the code check of video flowing usually, correspondingly, the bandwidth that takies also can increase.

Wherein, the film source code check can calculate through following formula:

Film source code check=sheet source size/reproduction time.

Step 103, network equipment are that user terminal distributes bandwidth according to determined film source code check.

Concrete, network equipment can be a user terminal distribution bandwidth according to this film source code check after confirming that the user ask film source code check of video of broadcast.Wherein, in order to guarantee video playing quality, avoid occurring phenomenons such as pauses, frame-skipping, network equipment is the film source code check of the bandwidth of the user terminal distribution video that should ask to play greater than the user.

Step 104, network equipment receive the Streaming Media MOS score value of user terminal feedback, and according to this Streaming Media MOS score value the bandwidth of this user terminal are adjusted.

Concrete; Present ITU-T (International Telecommunication Union Telecommunication Standardization Sector; International telecommunication union telecommunication's Standardization Sector) existing speech quality subjective assessment standard (Perceptual Evaluation of Speech Quality; Be called for short PESQ), and have associated companies to submit picture quality subjective assessment motion (Perceptual Evaluation of Video Quality is called for short PEVQ) to.Wherein, speech quality subjective evaluation standard can be as shown in table 1:

Table 1, speech quality subjective evaluation standard

Video quality subjective evaluation standard can be as shown in table 2:

Table 2, video quality subjective evaluation standard

In embodiments of the present invention, from the angle of subjective angle perception, the audio-visual synchronization standard is decided to be four grades as shown in table 3:

Table 3, synchronizing quality standards of grading

Wherein, the division of the time-delay thresholding of each grade can be as shown in table 4:

Table 4, synchronizing quality scoring thresholding

Comprehensive above three kinds of standards of grading (referring to table 1, table 2 and table 3) in embodiments of the present invention, have been introduced the standards of grading of Streaming Media MOS, comprise good, qualified and defective three class, and its concrete division can be as shown in table 5:

Table 5, Streaming Media MOS standards of grading

In video display process, user terminal can be marked to the video of current broadcast according to above-mentioned standards of grading, and regularly or not timing ground to the MOS score value of network equipment feedback current video.Wherein, user terminal can realize that to network equipment feedback flow medium MOS score value defective like 01 expression, 10 expressions are qualified through the form of the binary code of making an appointment, and 11 expressions are good.

Network equipment can be adjusted the bandwidth of this user terminal according to this Streaming Media MOS score value after receiving the Streaming Media MOS score value of user terminal feedback.Wherein:

The MOS score value that receives when network equipment is the stream media quality grade that shows the respective user terminal when being good first-class medium MOS score value, and network equipment thinks that the current bandwidth of this user terminal is proper, it is not adjusted;

The MOS score value that receives when network equipment is to show that the stream media quality grade at respective user terminal is the second qualified Streaming Media MOS score value; Or/and show when the stream media quality grade at respective user terminal is underproof the 3rd Streaming Media MOS score value; Network equipment improves the bandwidth of this user terminal, to improve the MOS score value of the video that this user terminal plays.Wherein, For the MOS score value is qualified and the MOS score value is underproof user, and network equipment can improve its bandwidth with different ratios, as being qualified user for the MOS score value; Network equipment can be finely tuned its bandwidth, so that its bandwidth to be provided than small scale; And be underproof user for the MOS score value, network equipment can provide its bandwidth with larger proportion.

It should be noted that; Because in the LTE system; The number of users that each sub-district can be carried is conditional; The number of users that inserts when certain sub-district has surpassed the going up of number of users that can carry this sub-district prescribes a time limit, and network equipment may occur and repeatedly adjust after bandwidth for certain user terminal, and the MOS score value that this user terminal feeds back is defective (the 3rd Streaming Media MOS score value) always.In order to practice thrift the system bandwidth resource; In embodiments of the present invention; When the Streaming Media MOS score value that in preset duration, receives the user terminal feedback when network equipment is the 3rd Streaming Media MOS score value; Network equipment can pipe off this user terminal, and stops to distribute bandwidth for this user terminal.

With TD-LTE (Time Division Long Term Evolution, time-division Long Term Evolution) system is example, and the present LTE system actual test rate in outfield can reach descending 56Mbps, and (in sub-frame configuration is DSUUDDSUUD; Special subframe adopts under the situation of 10:2:2 configuration); Calculate that according to this, single sub-district professional at the GBR that guarantees bandwidth (Guaranteed Bit Rate guarantees bit rate) be not under the load condition; If each user distributes the 5M bandwidth; Then for UDP (User Datagram Protocol, UDP) business, single subdistrict can carry 9 ~ 10 users in theory; For TCP (Transmission Control Protocol, transmission control protocol) business, single subdistrict can carry 6 ~ 8 users in theory.

Can draw through above description; In the technical scheme that the embodiment of the invention provides, on the one hand, network equipment is confirmed the film source code check that user terminal requests is play according to the wireless flow media playing request that receives; And be that user terminal distributes bandwidth according to this film source code check; Compare with the GBR business of fixed-bandwidth in the prior art, allocated bandwidth is more reasonable, has reduced the waste of bandwidth resources; On the other hand; When the network equipment receives the Streaming Media MOS score value of user terminal feedback; Network equipment is adjusted the bandwidth of this user terminal according to this Streaming Media MOS score value; Be that cost makes it to compare with the mode that network state is complementary through reducing stream media quality in the prior art, in the reasonable distribution bandwidth resources, guaranteed wireless flow media MOS.

It should be noted that in the technical scheme that the embodiment of the invention provides, is qualified and underproof user terminal for Streaming Media MOS score value; Except improving the Streaming Media MOS through the adjustment bandwidth; Can also realize improving Streaming Media MOS through the mode of adjustment transmission parameter, for example, be qualified and underproof user terminal for Streaming Media MOS score value; User terminal and network equipment can self adaptation be revised relevant parameters; Like transmission mode, MCS (Modulation and Coding Scheme, code modulation mode) grade, its concrete implementation repeats no more at this.

Based on the identical technical conceive of said method flow process, the embodiment of the invention also provides a kind of network equipment, can be applied to the said method flow process.

As shown in Figure 2, the structural representation of a kind of network equipment that provides for the embodiment of the invention is applied to the LTE system, can comprise:

Receiver module 21 is used to receive the wireless flow media playing request that user terminal sends;

Determination module 22, the wireless flow media playing request that is used for receiving according to said receiver module 21 is confirmed the film source code check of the wireless flow media of broadcast of asking;

Bandwidth allocation module 23, being used for according to the film source code check that said determination module 22 is confirmed is that said user terminal distributes bandwidth;

Bandwidth adjusting module 24 is used for when said receiver module 21 receives the average subjective score MOS score value of the Streaming Media of user terminal feedback, according to the Streaming Media MOS score value that receives the bandwidth of this user terminal being adjusted.

Wherein, said bandwidth allocation module 23 can specifically be used for, and distributes the bandwidth that is not less than said film source code check for user terminal.

Wherein, said Streaming Media MOS score value comprises:

The stream media quality grade that shows the respective user terminal is good first-class medium MOS score value; Or,

The stream media quality grade that shows the respective user terminal is the second qualified Streaming Media MOS score value; Or,

The stream media quality grade that shows the respective user terminal is underproof the 3rd Streaming Media MOS score value.

Correspondingly, said bandwidth adjusting module 24 can specifically be used for, and when said Streaming Media MOS score value was the second Streaming Media MOS score value, said network equipment improved the bandwidth of this user terminal; Or/and,

When said Streaming Media MOS score value was the 3rd Streaming Media MOS score value, said network equipment improved the bandwidth of this user terminal.

Wherein, said bandwidth adjusting module 24 can also be used for, and when the Streaming Media MOS score value that in preset duration, receives this user terminal feedback when said receiver module was the 3rd Streaming Media MOS score value, it was that this user terminal distributes bandwidth that said network equipment stops.

Can draw through above description; In the technical scheme that the embodiment of the invention provides, on the one hand, network equipment is confirmed the film source code check that user terminal requests is play according to the wireless flow media playing request that receives; And be that user terminal distributes bandwidth according to this film source code check; Compare with the GBR business of fixed-bandwidth in the prior art, allocated bandwidth is more reasonable, has reduced the waste of bandwidth resources; On the other hand; When the network equipment receives the Streaming Media MOS score value of user terminal feedback; Network equipment is adjusted the bandwidth of this user terminal according to this Streaming Media MOS score value; Be that cost makes it to compare with the mode that network state is complementary through reducing stream media quality in the prior art, in the reasonable distribution bandwidth resources, guaranteed wireless flow media MOS.

Through the description of above execution mode, those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential general hardware platform, can certainly pass through hardware, but the former is better execution mode under a lot of situation.Based on such understanding; The part that technical scheme of the present invention contributes to prior art in essence in other words can be come out with the embodied of software product; This computer software product is stored in the storage medium, comprise some instructions with so that a station terminal equipment (can be mobile phone, personal computer; Server, the perhaps network equipment etc.) carry out the described method of each embodiment of the present invention.

The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also should be looked protection scope of the present invention.

Claims (10)

1. A kind of method of optimizing wireless flow media service quality is applied to Long Term Evolution LTE system, it is characterized in that this method comprises:
Network equipment receives the wireless flow media playing request that user terminal sends;
Said network equipment confirms that according to the wireless flow media playing request that receives institute ask the film source code check of the wireless flow media of broadcast, and is said user terminal distribution bandwidth according to said film source code check;
When received the average subjective score MOS score value of the Streaming Media of user terminal feedback when network equipment, said network equipment was adjusted the bandwidth of this user terminal according to this Streaming Media MOS score value.
2. The method of claim 1 is characterized in that, said network equipment is that user terminal distributes bandwidth according to the film source code check, is specially:
said network equipment is that user terminal distributes the bandwidth that is not less than said film source code check.
3. The method of claim 1 is characterized in that, said Streaming Media MOS score value comprises:
The stream media quality grade that shows the respective user terminal is good first-class medium MOS score value; Or,
The stream media quality grade that shows the respective user terminal is the second qualified Streaming Media MOS score value; Or,
show that the stream media quality grade at respective user terminal is underproof the 3rd Streaming Media MOS score value.
4. Method as claimed in claim 3 is characterized in that, said network equipment is adjusted the bandwidth of this user terminal according to this Streaming Media MOS score value, is specially:
When said Streaming Media MOS score value was the second Streaming Media MOS score value, said network equipment improved the bandwidth of this user terminal; Or/and,
When were the 3rd Streaming Media MOS score value when said Streaming Media MOS score value, said network equipment improved the bandwidth of this user terminal.
5. Method as claimed in claim 3 is characterized in that, this method also comprises:
When receive this user terminal feedback when network equipment in preset duration Streaming Media MOS score value was the 3rd Streaming Media MOS score value, it was that this user terminal distributes bandwidth that said network equipment stops.
6. A kind of network equipment is applied to Long Term Evolution LTE system, it is characterized in that this network equipment comprises:
Receiver module is used to receive the wireless flow media playing request that user terminal sends;
Determination module, the wireless flow media playing request that is used for receiving according to said receiver module is confirmed the film source code check of the wireless flow media of broadcast of asking;
Bandwidth allocation module, being used for according to the film source code check that said determination module is confirmed is that said user terminal distributes bandwidth;
bandwidth adjusting module is used for when said receiver module receives the average subjective score MOS score value of the Streaming Media of user terminal feedback, according to the Streaming Media MOS score value that receives the bandwidth of this user terminal being adjusted.
7. Network equipment as claimed in claim 6 is characterized in that,
said bandwidth allocation module specifically is used for, and distributes the bandwidth that is not less than said film source code check for user terminal.
8. Network equipment as claimed in claim 6 is characterized in that, said Streaming Media MOS score value comprises:
The stream media quality grade that shows the respective user terminal is good first-class medium MOS score value; Or,
The stream media quality grade that shows the respective user terminal is the second qualified Streaming Media MOS score value; Or,
show that the stream media quality grade at respective user terminal is underproof the 3rd Streaming Media MOS score value.
9. Network equipment as claimed in claim 8 is characterized in that,
Said bandwidth adjusting module specifically is used for, and when said Streaming Media MOS score value was the second Streaming Media MOS score value, said network equipment improved the bandwidth of this user terminal; Or/and,
When were the 3rd Streaming Media MOS score value when said Streaming Media MOS score value, said network equipment improved the bandwidth of this user terminal.
10. Network equipment as claimed in claim 8 is characterized in that,
said bandwidth adjusting module also is used for; When the Streaming Media MOS score value that in preset duration, receives this user terminal feedback when said receiver module was the 3rd Streaming Media MOS score value, it was that this user terminal distributes bandwidth that said network equipment stops.
CN201210047591.9A 2012-02-28 2012-02-28 Method for optimizing quality of service of wireless streaming media and device CN102624712B (en)

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Cited By (5)

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CN102883193A (en) * 2012-10-09 2013-01-16 乐视网信息技术(北京)股份有限公司 Content distribution flow control method
CN103052165A (en) * 2013-01-06 2013-04-17 西安交通大学 Wireless resource distribution method of multi-service family base station
CN104967880A (en) * 2015-05-29 2015-10-07 董遂武 Method and equipment for uniformly distributing videos in wireless network
WO2017147743A1 (en) * 2016-02-29 2017-09-08 华为技术有限公司 Video optimization method, user equipment unit and network equipment unit
US10440078B2 (en) * 2014-10-24 2019-10-08 Amazon Technologies, Inc. Streaming content adjustment based on camera feedback

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CN101018199A (en) * 2007-01-12 2007-08-15 华为技术有限公司 Radio bandwidth allocation method, device and gateway device of the mobile stream media code stream
CN101159442A (en) * 2007-10-30 2008-04-09 上海华为技术有限公司 Method and base station of enhancing voice quality

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CN101018199A (en) * 2007-01-12 2007-08-15 华为技术有限公司 Radio bandwidth allocation method, device and gateway device of the mobile stream media code stream
CN101159442A (en) * 2007-10-30 2008-04-09 上海华为技术有限公司 Method and base station of enhancing voice quality

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102883193A (en) * 2012-10-09 2013-01-16 乐视网信息技术(北京)股份有限公司 Content distribution flow control method
CN103052165A (en) * 2013-01-06 2013-04-17 西安交通大学 Wireless resource distribution method of multi-service family base station
CN103052165B (en) * 2013-01-06 2015-10-28 西安交通大学 A kind of wireless resource allocation methods of multiple services Home eNodeB
US10440078B2 (en) * 2014-10-24 2019-10-08 Amazon Technologies, Inc. Streaming content adjustment based on camera feedback
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CN104967880B (en) * 2015-05-29 2019-04-30 董遂武 A kind of method and apparatus of distribution video uniform in the wireless network
WO2017147743A1 (en) * 2016-02-29 2017-09-08 华为技术有限公司 Video optimization method, user equipment unit and network equipment unit
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