WO2018161303A1 - Method and apparatus for monitoring video quality of experience supported by wireless quality of service - Google Patents

Abstract

The present application provides a method and an apparatus for monitoring video quality of experience supported by wireless quality of service. The method comprises: acquiring network information of wireless nodes in a network, the network information comprising a first air interface rate capability and a first wireless side round-trip delay time (RAN RTT) in data transmission between a base station and user equipment (UE); calculating, according to the first air interface rate capability and the first RAN RTT, a first initial buffer delay supported by the base station, and calculating, according to the first air interface rate capability, a first stutter duration proportion supported by the base station; and determining, by using the first initial buffer delay, the first stutter duration proportion, and specified video source quality, a first video quality of experience score supported by a wireless air interface of the base station, determining whether the first video quality of experience score is less than a preset target value, and determining that wireless quality of service between the base station and the UE cannot meet a requirement if the first video quality of experience score is less than the preset target value.

Description

Wireless quality support video experience detection method and device Technical field

The present application relates to the field of user video experience, and in particular, to a method and apparatus for detecting a wireless quality support video experience.

Background technique

The video experience value score is the score that the user plays on the network video experience, and is a measure used by the network operator to evaluate the quality of the network video. Therefore, it is the main purpose of the operator to improve the video quality to increase the user's video experience.

An existing mobile video network system, as shown in FIG. 1, the system includes a user equipment (UE), a base station, a switch, an over the top (OTT) server, a transport network, and a core network. (mobility management entity, MME), bearer network and other equipment. The user clicks to browse the video source, and transmits it to the OTT server through the base station, the switch, and the core network, and the OTT server allocates and deploys the video download rate according to the bandwidth of the mobile video network system.

Generally, in a mobile video network system, when a base station transmits video to a UE, the UE acquires a download rate of the base station, that is, an air interface rate is an important link affecting transmission efficiency in the network system, and is good for ensuring a user video experience. The necessary conditions, therefore, need to evaluate the wireless quality support video experience between the base station and the UE, and guide the operator to conduct wireless quality planning based on the target video experience.

However, the existing evaluation method for the network side video experience is generally a method of deploying a probe at the network node for intermediate packet capture or server analysis, and analyzing and evaluating the video end-to-end (E2E) experience. For example, the video experience from the UE to the server does not represent the video experience supported by the radio quality between the UE and the base station, and thus cannot accurately guide the wireless network planning.

Summary of the invention

The present application provides a method for detecting a wireless quality support video experience to implement video quality assessment and planning based on wireless quality support. To solve this technical problem, the present application discloses the following technical solutions:

In a first aspect, the present application provides a method for detecting a wireless quality support video experience, the method comprising:

The computer or the software obtains the network information of the wireless node in the network, where the wireless node in the network includes the base station, the user equipment UE, the server, and the like, and the network information includes the first air interface rate capability and the first data transmission between the base station and the UE. a radio side round trip delay RAN RTT, wherein the RAN RTT is a UE to a base station Round-trip delay; calculating a first initial buffer delay supported by the base station according to the first air interface rate capability and the first RAN RTT, and calculating a first supported by the base station according to the first air interface rate capability Determining the first video buffer score supported by the base station wireless air interface by using the first initial buffering delay, the first carding duration ratio, and the specified video source quality; determining the first video experience score Whether it is less than a preset target value, if it is less than the preset target value, it is determined that the wireless quality between the base station and the UE cannot meet the requirement.

In this implementation manner, by acquiring the air interface rate capability between the base station and the user equipment and the round-trip delay of the wireless side, and using these two parameters to determine the video experience supported by the wireless air interface of the base station, representing the wireless quality between the base station and the user equipment. The video experience that can be supported, finds the bottleneck of the wireless air interface, and accurately guides the wireless network planning according to the wireless air interface pipeline capability, ensuring that the wireless quality supports the best effect of the video experience.

With reference to the first aspect, in the first implementation of the first aspect, the acquiring the first air interface rate capability in the network information includes: acquiring a first air interface rate capability supported by the base station, where the air interface rate capability is The at least one UE covered by the base station averages the maximum transmission rate obtained when each of the UEs transmits data. Since the air interface rate capability represents the maximum rate that wireless quality can support, it can fully reflect the wireless pipe transmission capability.

With reference to the first aspect, in the second implementation of the first aspect, in the three-way handshake of the TCP protocol, the first RAN RTT can be obtained by: acquiring the negotiation packet sent by the server in the network to the UE. a first moment of the SYNACK; then, after receiving the SYNACK, the UE feeds back a SYNACKACK to the server, and the computer acquires a moment when the UE feeds back a SYNACKACK, and sets a second moment; and finally, according to the second moment and the second moment The first RAN RTT is calculated at intervals between times.

In this implementation manner, by acquiring the first RAN RTT between the base station and the UE, the loopback delay in the existing network environment can be accurately reflected, and the video experience score supported by the wireless air interface can be accurately calculated.

With reference to the first aspect, in a third implementation of the first aspect, the step of the computer calculating the first initial buffering delay supported by the base station by using the first air interface rate capability and the first RAN RTT specifically includes: first designating a video source; Obtaining a video source parameter according to the specified video source, where the video source parameter includes a video resolution and a video bit rate; and then, using the video source parameter and a data flow required by the initial buffer of the video source, establishing an initial buffer model The initial buffering model is used to calculate a first initial buffering delay. Specifically, the first air interface rate capability and the first RAN RTT may be substituted into the initial buffering model to calculate the first initial buffering delay.

In this implementation manner, the video source parameter, the video resolution, and the video bit rate are determined by specifying a video source to ensure that the video quality influencing factors of the non-air interface are unchanged, thereby implementing the detection and evaluation of the radio quality based on the air interface rate capability and the RAN RTT. .

With reference to the first aspect, in a fourth implementation of the first aspect, the step of calculating, by the computer according to the first air interface rate capability, the proportion of the cardon duration supported by the base station includes: first, acquiring a specified video source; Specifying a video source to obtain video source parameters, such as video resolution and video bitrate; then, utilizing the video a source parameter and a process of a video playing phase of the video source, establishing a carton duration ratio model supported by the base station; and finally, calculating, by using the parameter of the first air interface rate capability into the carton duration ratio model, The first carton is the proportion of time.

In this implementation manner, the video source parameter, the video resolution, and the video bit rate are determined by specifying a video source to ensure that the video quality influencing factors of the non-air interface are unchanged, thereby implementing the detection and evaluation of the radio quality based on the air interface rate capability and the RAN RTT. .

With reference to the first aspect, or any one of the first to fourth aspects of the first aspect, in the fifth implementation of the first aspect, detecting, if the video experience score is smaller than the preset target value, indicating that the base station and The radio quality between UEs cannot support the best experience of user video. The RAN RTT and air interface rate capabilities need to be re-planned. The specific implementation includes the following steps: First, through the method of big data modeling and the massive samples that have occurred on the live network. Based on the big data learning theory, the function model of the key performance indicator KPI in the RAN RTT and the network foundation is established; then, the network KPI information is obtained after the simulation planning, and the network KPI information includes the planned second air interface rate capability and the number of users. And loading, etc. Finally, the network KPI information and the second air interface rate capability are substituted into the KPI function model to calculate the planned second RAN RTT.

In this implementation manner, the second RAN RTT after the planning can be accurately predicted by establishing the KPI function model, so that the video experience score supported by the wireless quality after network construction can be accurately predicted according to the second RAN RTT.

With the fifth implementation of the first aspect, in the sixth implementation of the first aspect, after obtaining the planned RAN RTT and the air interface rate capability, it is required to further determine whether the planned radio quality meets the target requirement, and the specific detection method includes the following: Step: First, calculate a second initial buffering delay supported by the base station, and a ratio of a second aging time according to the planned second air interface rate capability and the planned RAN RTT, where the first The initial buffer model and the Carton duration ratio model established by the aspect obtain the second initial buffer delay and the second cardon duration; then, the second initial buffer delay, the second Karten duration ratio, and the designated video source are utilized. The second video experience score supported by the base station after the quality determination is planned; determining whether the second video experience score is greater than or equal to a preset target value, and if the second video experience score is greater than or equal to the preset target value, The wireless quality between the planned base station and the UE meets the requirements; otherwise, if the requirements are not met, the RAN RTT and the air interface rate energy need to be planned again. After the video experience points again until the plan reaches the preset target so far.

The method provided by the present invention realizes that the wireless quality can support the evaluation of the best video experience, finds the bottleneck of the wireless quality air interface, accurately evaluates the user's video experience, and guides the operator to carry out network planning, thereby realizing the most reasonable planning. The solution solves the problem of wireless networks.

In a second aspect, the present application further provides a detecting apparatus for a wireless quality support video experience, where the apparatus includes: an acquiring unit, configured to acquire network information of a wireless node in a network, where the network information includes a base station and a user equipment UE a first air interface rate capability for transmitting data and a first radio side round trip delay RAN RTT; a processing unit, configured to calculate a first initial supported by the base station according to the first air interface rate capability and the first RAN RTT a buffering delay, and calculating, according to the first air interface rate capability, a first cascading time ratio supported by the base station; the processing unit is further configured to utilize the first initial buffering delay and the first aging time Proportion and index Determining a video source quality to determine a first video experience score supported by the base station wireless air interface; the processing unit is further configured to determine whether the first video experience score is less than a preset target value, and if the preset target value is less than Then determining that the wireless quality between the base station and the UE cannot meet the requirements.

In addition, the device further includes a storage unit, configured to store data acquired and generated, including a first air interface rate capability, a first RAN RTT, a first initial buffering delay, a first aging time ratio, and a designated video source. Data such as quality, first video experience points, and preset target values.

With reference to the second aspect, in a first implementation of the second aspect, the acquiring unit is configured to acquire a first air interface rate capability supported by the base station, where the air interface rate capability is in at least one UE covered by the base station , averaging the maximum transmission rate obtained when each of the UEs transmits data.

With reference to the second aspect, in a second implementation of the second aspect, the acquiring unit is further configured to record, in a three-way handshake of the TCP protocol, a first moment that is sent by the server in the network to the UE to negotiate a packet SYNACK. Recording a second time that the UE sends the SYNACKACK to the server, where the second time refers to that the UE feeds back to the server after receiving the SYNACK sent by the server, and then, according to the first moment and the first Calculating, by the second time, the first RAN RTT between the UE and the base station.

With reference to the second aspect, in a third implementation of the second aspect, the processing unit is further configured to: obtain, by using the acquiring unit, a specified video source, and obtain a video source parameter according to the specified video source, where the video source parameter is Including a video resolution and a video bit rate, using the video source parameters and a data flow required by the initial buffering of the video source to establish an initial buffer model; substituting the first air interface rate and the first RAN RTT into the initial The buffer model calculates the first initial buffer delay.

With reference to the second aspect, in a fourth implementation of the second aspect, the processing unit is further configured to acquire a specified video source, and obtain a video source parameter according to the specified video source, where the video source parameter includes a video resolution and a video. a code rate, using the video source parameter and a process of a video playing phase of the video source, establishing a carton duration ratio model supported by the base station; and substituting the first air interface rate into the cardon duration ratio The model calculates the ratio of the first cascading time.

With reference to the second aspect, or any one of the first to fourth aspects of the second aspect, in the fifth implementation of the second aspect, the processing unit is further configured to detect, if the video experience score is smaller than the pre- Setting a target value, establishing a function model of the first RAN RTT and a key performance indicator KPI of the network; obtaining network KPI information after the simulation planning, the network KPI information including a second air interface rate capability; using the network KPI information and the location The second air interface rate capability and the function model calculate a planned second RAN RTT.

With reference to the fifth implementation of the second aspect, in a sixth implementation of the second aspect, the processing unit is further configured to calculate, according to the second air interface rate capability and the planned RAN RTT, the base station supported by the base station a second initial buffering delay and a second cascading time ratio; determining, by the base station, the second initial buffering delay, the second cascading duration ratio, and the specified video source quality a second video experience score; if the second video experience score is greater than or equal to the preset target value, the wireless between the planned base station and the UE Quality meets the requirements. If the second video experience score is less than the preset target value, the optimal video experience effect is still not satisfied, and the wireless quality between the base station and the UE needs to be planned again.

In a third aspect, the present application further provides a network device, including the apparatus for detecting a wireless quality support video experience according to the foregoing various implementation manners of the second aspect, specifically, the network device includes: a transceiver, a processor, and A memory, the processor can execute a program or instructions stored in the memory to implement a method of detecting a wireless quality support video experience as described in various implementations of the first aspect.

In a fourth aspect, the present application further provides a storage medium, where the computer storage medium can store a program, and when the program is executed, part or all of the embodiments of the method for detecting a wireless quality support video experience provided by the present application can be implemented. step.

Compared with the traditional E2E video quality assessment method, the detection method provided by the present application considers the air interface rate capability between the base station and the user equipment and the RAN RTT, and isolates the video quality influencing factors of the non-air interface, and solidifies the resolution, the code rate, and the RAN. The above-mentioned RTT and initial buffered data amount and other non-airway influence factors can accurately determine whether the video quality is lower than the preset target value or not. If it is not caused by wireless quality, it is necessary to solve the problem of non-wireless network; if it is caused by wireless quality, the wireless quality is planned and processed.

DRAWINGS

In order to more clearly illustrate the technical solutions of the present application, the drawings used in the embodiments will be briefly described below. Obviously, for those skilled in the art, without any creative labor, Other drawings can also be obtained from these figures.

FIG. 1 is a schematic diagram of an E2E network structure according to an embodiment of the present application;

2 is a schematic diagram of factors affecting video quality of each node of a network according to an embodiment of the present application;

FIG. 3 is a flowchart of a method for detecting a wireless quality support video experience according to an embodiment of the present disclosure;

FIG. 4 is a schematic flowchart of acquiring an air interface rate capability according to an embodiment of the present disclosure;

FIG. 5 is a schematic flowchart of a TCP three-way handshake according to an embodiment of the present disclosure;

FIG. 6 is a schematic diagram of a video playing process according to an embodiment of the present application;

FIG. 7 is a schematic diagram of an initial download phase after TCP establishment according to an embodiment of the present application;

FIG. 8 is a schematic diagram of downloading video initial buffer data according to an embodiment of the present disclosure;

FIG. 9 is a schematic flowchart of a wireless quality planning according to an embodiment of the present disclosure;

FIG. 10 is a schematic diagram of a device for detecting a wireless quality support video experience according to an embodiment of the present disclosure;

FIG. 11 is a schematic structural diagram of a network device according to an embodiment of the present disclosure;

FIG. 12 is a schematic diagram of a relationship between video experience points and resolutions according to an embodiment of the present disclosure.

detailed description

In order to facilitate the following description and clearly explain the present application, the following briefly describes the concepts that may be used in this application:

In order to evaluate whether the wireless quality between the base station and the UE meets the video experience requirements of the operator, the present application proposes an evaluation of the wireless access user to obtain a video experience under the wireless quality, and guides the wireless according to the operator's video experience target. The network planning solution includes: designating a typical video source of the network, ensuring the video experience supported by the wireless network under the premise that the transmission network or the server is not a bottleneck, and performing network planning based on the current wirelessly supported video experience, and simulating the planned Wireless network quality supports the video experience.

The wireless quality support video experience can be understood as: specifying a typical video to ensure that the transmission or the server is not a bottleneck, based on the current network architecture, the best video experience that the wireless quality can support.

Referring to FIG. 2, in a network evaluation plan that supports an optimal video experience for wireless quality, in general, the main factors affecting the video experience include video source quality, video buffer delay, and sStalling. Further, parameters affecting these main factors include: resolution, code rate, initial buffer playable duration, wireless speed capability, Radio Access Network Round-Trip Time (RAN RTT), and RAN above RTT and so on. The parameters of the air interface video quality between the base station and the UE that can affect the main factors of the video experience include only the air interface rate and the RAN RTT, and the remaining parameters (such as resolution, code rate, RTT above RAN and initial buffer playable duration) can be summarized. It is a factor affecting the quality of non-air interface video.

The method provided in this embodiment isolates the video quality influencing factors of the non-air interface, and fixes the non-air interface factors (resolution, code rate, RTT and initial buffered data amount), and detects whether the video quality is lower than the target value. The quality of the radio between the base station and the UE results. If it is not caused by wireless quality, it is necessary to solve the problem of non-wireless network; if it is caused by wireless quality, the wireless quality is optimized.

Referring to FIG. 3, a flowchart of a method for detecting a radio quality according to an embodiment of the present disclosure includes the following steps:

Step 301: The network device acquires network information of the wireless node in the network, where the network information includes a first air interface rate capability for transmitting data between the base station and the user equipment UE, and a first radio side round-trip delay RAN RTT.

Step 302: Calculate a first initial buffer delay supported by the base station according to the first air interface rate capability and the first RAN RTT, and calculate a first jam time supported by the base station according to the first air interface rate capability. Long-term ratio.

Step 303: Determine, by using the first initial buffering delay, the first cardon duration ratio, and the specified video source quality, a first video experience score supported by the base station wireless air interface.

Step 304: Determine whether the first video experience score is less than a preset target value. If the preset target value is less than the preset target value, determine that the radio quality between the base station and the UE cannot meet the requirement, and need to be planned; if greater than or equal to The preset target value indicates that the wireless quality meets the requirements and no planning is required.

Specifically, in step 301, the network information further includes: a resolution, a code rate, an initial buffer playable duration, and an RTT or higher parameter. The air interface rate capability refers to an average transmission rate obtained when each of the UEs transmits data in at least one UE covered by the base station.

Optionally, as shown in FIG. 4, the network device acquires the air interface rate capability of the UE, where the base station acquires a measurement report reported by the UE, where the measurement report includes parameters such as a CMSI and a RANK value of the base station coverage quality channel quality indicator, according to the protocol TBS. INDEX calculates the schedulable data of each RB, and then calculates the maximum schedulable rate capability of the cell according to the number of bandwidth RBs. The network device calculates, according to the maximum schedulable rate capability of the cell and the fair scheduling principle, the maximum scheduling rate that can be obtained by a single user when the number of concurrent users is N, and uses the maximum scheduling rate as the air interface rate capability (V).

Wherein, in step 301, the E2E RTT includes a RAN RTT and an RTT above the RAN. Among the RTTs above the RAN, the delay is basically stable because the network is relatively stable after the video is specified. The RAN RTT is greatly affected by the quality and load of the air interface coverage. It can be extracted from the actual service initiated by the network when detecting the wireless quality.

For example, in this embodiment, acquiring the first RAN RTT includes: acquiring a round-trip delay RTT of the UE to the base station. Specifically, as shown in FIG. 5, the base station acquires a Transmission Control Protocol (TCP) three-way handshake data of the UE and the server. The base station records a first time of the negotiation packet SYNACK sent by the server to the UE, for example, a timestamp t1; the base station records a second time of the SYNACKACK packet of the UE in response to the server SYNACK, for example, a timestamp t2, and calculates the second moment The RAN RTT is obtained from the time difference of the first time, that is, according to the time stamp t2-t1.

In the TCP handshake protocol, the TCP protocol provides a reliable connection service, and a three-way handshake is used to establish a connection. Specifically, the first handshake: When establishing a connection, the UE sends a SYN packet (SYN=1) to the server, and enters the SYN SEND state, waiting for the server to confirm; SYN (Synchronize Sequence Numbers). The second handshake: After receiving the SYN packet, the server must confirm the SYN of the UE (ACK=X+1), and also send a SYN packet (SYN=1), that is, the SYN+ACK packet, and the server enters the SYN_RECV state. Third handshake: The UE receives the SYN+ACK packet from the server and sends an acknowledgement packet ACK (ACK=Y+1) to the server. After the packet is sent, the UE and the server enter the ESTABLISHED state and complete the three-way handshake. . After completing the three-way handshake, the UE and the server start transmitting data.

The method provided in this embodiment obtains the air interface rate capability between the base station and the user equipment and the round-trip delay of the wireless side, and uses these two parameters to determine the video experience supported by the wireless air interface of the base station, and represents the relationship between the base station and the user equipment. The video experience that wireless quality can support, finds the bottleneck of the wireless air interface, and accurately guides the wireless network planning according to the wireless air interface pipeline capability, ensuring that the wireless quality supports the best effect of the video experience.

Optionally, the first initial buffering delay supported by the base station is calculated according to the first air interface rate capability and the first RAN RTT, and the base station support is calculated according to the first air interface rate capability. Before the first carton duration, it also includes: establishing an initial buffer delay model and a carton duration ratio model, the specific process includes:

First, the video source is specified, and then the video source parameter is obtained according to the specified video source, where the video source parameter includes a resolution, a code rate, an RTT of the base station to the video service, a data amount to be downloaded in the buffering stage, and the like. a video source parameter and a data flow required for initial buffering of the video source, establishing an initial buffer model, and finally, calculating a first initial buffering time according to the first air interface rate, the first RAN RTT, and the initial buffer model Delay.

Similarly, the process of calculating the proportion of the cardon duration supported by the base station according to the first air interface rate includes: first acquiring a specified video source, and obtaining a video source parameter according to the specified video source, where the video source parameter includes a resolution, a code rate, The RTT of the base station to the video service, the amount of data to be downloaded in the buffering phase, and the like, and the use of the video source parameter and the video playback phase of the video source to establish a model of the card time duration ratio supported by the base station. Finally, the first Karten time ratio is calculated according to the first air interface rate capability and the Carton duration ratio model.

Referring to FIG. 6, the video playing process includes: a video preparation phase, a video buffering phase, and a video playback phase. These three phases correspond to video source quality (sQuality), initial buffering delay (sLoading), and stalling time ratio (sStalling).

Among them, the quality of the video source: mainly includes the video resolution and the video bit rate, which can be obtained by specifying a video source. Initial buffering delay: Includes the video preparation phase and the video initial buffer phase. The video preparation phase involves complex processes such as video related information acquisition (such as advertisements), video frequency division index file address acquisition, redirection, and TCP link establishment. These processes are closely related to end-to-end delay (E2E RTT). Correlation, so it can be converted to the number of required E2E RTTs by analyzing the specified video source, where the E2E RTT includes the RAN RTT and the RTT above the RAN.

The video buffering phase is a real download process of the video segmentation data. Under the determined initial buffered data volume, the video buffer download delay can be evaluated according to the video segmentation information and the TCP data transmission model, and the general process of the TCP data transmission model for video downloading. Including: slow start, congestion avoidance and steady state download three stages, as shown in Figure 7.

Among them, in the slow start phase, the server TCP send window increases exponentially for each E2E RTT time period. When the TCP send window reaches the slow start threshold, it enters the congestion avoidance phase. The influencing factors include the server initial send window (m) and the slow start threshold (ssthrsh). In the congestion avoidance phase, the server TCP transmission window grows linearly every E2E RTT time period until the network bandwidth is reached, and the steady-state download phase is entered. The influencing factors include the linear growth step (s) of the server transmission window. The steady state download phase is related to the initial buffered data volume requirement (T1) of the video service and the steady state packet rate (v) of the server.

The server includes a video server or an OTT server.

The initial buffering delay model is related to video fragmentation information, initial buffered data volume, and TCP transmission process. As shown in Figure 8. Specifically, the initial buffer delay model is expressed as follows:

When modeling the sStalling, it is necessary to ensure that the air interface rate capability is greater than the specified video playback rate (Bitrate) during the video playback phase. If the air interface rate capability is greater than the video playback rate, the video can be played normally; if the air interface rate capability is less than the video playback rate and there is no buffered data, the card will be generated; since the video playback rate is constantly changing, the normal code The rate is the average bit rate, considering the fluctuation of the code rate, no carton playback, the download rate of E2E (such as server to UE) is required ≥ k* video average play rate; if the download rate is <k* video average code Rate, the video download duration will be greater than the video playback duration, and the video playback duration is greater than the video playback duration. Generally, when the k value is 1.3, the video is basically free of stagnation, so the empirical value k is 1.3), thereby establishing the following Karten duration ratio model:

After the video source is specified, the parameters related to the specified video source are fixed, for example: fragmentation information, TCP initial transmission window (m), TCP packet size (MSS), slow start threshold (ssthrsh), congestion Avoid window growth step (s), steady state rate (V), video playback rate (Bitrate) and video initial buffer phase download data volume (T1), wireless quality related air interface rate capability (V) and RAN RTT It will change accordingly.

In order to detect the influence of the influencing factors (airport rate capability and RAN RTT) in the radio quality on the video experience, according to the initial buffering delay model and the Carton duration ratio model established above, the fixed parameters and the influencing factors are assigned after the specified video. Calculate the best video quality supported by the air interface, as follows:

Where N is the number of round trips for video negotiation, M is the number of slow start round trips, RTT is the round trip delay between the base station and the UE, V is the air interface rate capability, the unit is xMbps, and m is the TCP initial send window (windows size) MSS indicates the size of the TCP packet, T1 indicates the amount of data downloaded during the video buffer phase, B_inti indicates the amount of data downloaded during the slow start phase of the video, and Bitrate indicates the video bit rate.

Establish a video experience model, which can be used for video source quality (sQuality), initial buffer delay (sLoading), The sStalling output model is output separately, and the video experience model including three factors can also be output, and the simulation of video source quality, initial buffer delay, carton duration and overall video experience can be simulated separately. .

One possible implementation manner is that, according to the relationship: video experience score = f (sQuality, sLoading, sStalling), the video experience score or video experience indicator supported by each base station can be calculated. The video experience indicator is related to factors such as initial buffer duration, number of jams, duration of the card, resolution, and screen size. It is assumed that the evaluated video experience of the base station is divided into X, and the preset target value required by the operator to establish a network is Y. If X is greater than or equal to Y, it indicates that the radio quality between the base station and the UE reaches a preset target value, and the base station needs Re-planning, if X is less than Y, the radio quality does not meet the requirements, and the base station needs to plan again.

A possible video experience sub-evaluation method is: see 12, which shows a relationship between video experience and resolution, wherein the video experience score is obtained when the video resolution is 720 with a perfect score of 5 points. Between 1-4 points; when the resolution is 1080, the corresponding video experience points range from 1-4.5 points; when the resolution is 2000, the corresponding video experience points range from 1-4.8 points; the resolution is 4000. The corresponding video experience score ranges from 1 to 4.9 points, which means that the higher the resolution of the video, the higher the video experience score is, the more the user video experience can be achieved. Specifically, the video experience points and user feelings are shown in Table 1 below.

Video experience points	Value	User experience
5	Excellent	very good
4	Good	well
3	Fair	Good, slight dislike
2	Poor		Dislike
1	Bad	Very disgusted

Table 1

The network evaluation planning method based on wireless support for optimal video quality provided by the embodiment can not only achieve the wireless quality to support the evaluation of the best video experience, but also find the bottleneck of the wireless air interface, and can support the best video experience based on the wireless quality. Guide the video network planning to ensure that the wireless network will not become a bottleneck in video development.

Compared with the traditional E2E video quality assessment method, the wireless quality detection between the base station and the UE is realized by studying the air interface rate capability of the base station and the RAN RTT, so that the best video quality evaluation of the wireless support can focus on the video quality supported by the wireless network. , fully embodies the ability of wireless air ducts. The detection method provided by the technical solution realizes planning based on the most accurate wireless side support video quality evaluation, so that the planning result is reasonable.

It should be noted that the method provided by the embodiment of the present application detects and plans the air interface rate capability and the RAN RTT that affect the radio quality between the base station and the UE by using a typical video source of the specified network as the evaluation object, where the planning means includes It is not limited to modeling and calculation of initial buffer delay, carton duration, cardoon duration, and rebuffer delay. That is, through the three processes of video experience theory modeling, air interface best video experience evaluation, planning and simulation prediction, the method of wireless network planning for the best video experience supported by current wireless quality belongs to this application. Please protect the scope.

In an optional embodiment of the present application, if the radio quality of the detecting base station does not meet the requirement, that is, the video experience score is smaller than the preset target value, the radio quality of the base station is planned, as shown in FIG. include:

Step 305: The network device establishes a function model of the first RAN RTT and the Key Performance Indicators (KPI) of the network.

Step 306: After the simulation is planned, the network KPI information is obtained, where the network KPI information includes the second air interface rate capability, the cell traffic, the cell load, the number of cell users, and the like.

Step 307: Calculate the planned second RAN RTT by using the network KPI information and the second air interface rate capability and the function model.

Specifically, since the planned air interface rate capability, that is, the second air interface rate capability, is related to the number of cell users and the user signal quality, the traffic, the number of cell users, and the signal quality of the cell after the planning are changed, and the cell phone is simulated after the simulation. Service, number of cell users, signal quality, recalculating the air interface rate capability, that is, the second air interface rate capability.

In step 307, the planned cell traffic, the number of cell users, the cell load, and the like are simulated, and the second air interface rate capability is combined to predict the post-planned RAN RTT, that is, the second RAN RTT.

After acquiring the second air interface rate capability and the planned RAN RTT, calculating, according to the second air interface rate capability and the planned RAN RTT, the second initial buffer delay supported by the base station, and the second cardon duration ratio And then determining, by the second initial buffering delay, the second duration of the card and the specified video source quality, the second video experience score supported by the base station after the planning; comparing the second video experience score The size of the preset target value, if the second video experience score is greater than or equal to the preset target value, the wireless quality between the planned base station and the UE meets the requirement, and the planned radio quality reaches The network operator requires; if it is smaller than the preset target value, the air interface rate capability and the RAN RTT need to be planned again until the planned video experience reaches the preset target value.

The wireless quality planning means described in this embodiment includes not limited to video characteristics, product characteristics (such as CA&mTnR, etc.), multi-carrier, multi-sector, macro-micro station, room sub-station, and the like.

The wireless quality support video experience planning scheme provided by this embodiment supports a method for modeling big data by using RAN RTT and network KPI, number of users, load, and the like, and predicts RAN RTT after network planning, and represents the largest pipeline of the wireless network. The video experience supported by the ability, and the planning and resolution of the video experience shortcomings due to wireless quality reasons.

The embodiment of the present application further provides a device for detecting a wireless quality support video experience, which is used to implement the functions in the foregoing method embodiments. Specifically, as shown in FIG. 10, the apparatus includes: acquiring unit 1001 And processing unit 1002, in addition to the obtaining unit 1001 and the processing unit 1002, the apparatus may include other unit modules such as a transmitting unit and a storage unit.

The acquiring unit 1001 is configured to acquire network information of a wireless node in the network, where the network information includes a first air interface rate capability for transmitting data between the base station and the user equipment UE, and a first radio side round-trip delay RAN RTT.

The processing unit 1002 is configured to calculate, according to the first air interface rate capability and the first RAN RTT, a first initial buffering delay supported by the base station, and calculate, according to the first air interface rate capability, a first campon duration ratio supported by the base station. .

The processing unit 1002 is further configured to determine, by using a first initial buffering delay, a first cardon duration ratio, and a specified video source quality, a first video experience score supported by the base station wireless air interface.

The processing unit 1002 is further configured to determine whether the first video experience score is less than a preset target value, and if it is less than the preset target value, determine that the radio quality between the base station and the UE cannot meet the requirement.

Optionally, the acquiring unit 1001 is configured to acquire a first air interface rate capability supported by the base station, where the air interface rate capability is obtained by using an average of each of the UEs to transmit data in the at least one UE covered by the base station. Maximum transfer rate.

Optionally, the obtaining unit 1001 is further configured to: acquire, by using a base station, a first time that is sent by the server in the network to the UE to negotiate a packet SYNACK, and acquire, by the base station, the UE to send to the server in response to the SYNACK. a second moment of the SYNACKACK, and calculating, according to the first moment and the second moment, the first RAN RTT between the UE and the base station.

Optionally, the processing unit 1002 is further configured to obtain a specified video source, and obtain a video source parameter according to the specified video source, where the video source parameter includes a resolution, a code rate, an RTT of the base station to the video service, and a buffering stage. An amount of data to be downloaded, an initial buffer model is established by using the video source parameter and a data flow required for initial buffering of the video source; according to the first air interface rate, the first RAN RTT, and the initial buffer model Calculating the first initial buffering delay.

Optionally, the processing unit 1002 is further configured to acquire a specified video source, and obtain a video source parameter according to the specified video source, where the video source parameter includes a resolution, a code rate, and the base station to video service. The RTT and the buffering phase need to download the amount of data, and use the video source parameter and the process of the video playing phase of the video source to establish a carton duration ratio model supported by the base station; according to the first air interface rate and The Carton duration ratio model calculates the ratio of the first cardon duration.

Optionally, the processing unit 1002 is further configured to: if the video experience score is smaller than the preset target value, establish a function model of the first RAN RTT and a key performance indicator KPI of the network; KPI information, the network KPI information includes a second air interface rate capability; and the planned second RAN RTT is calculated by using the network KPI information and the second air interface rate capability and the function model.

Optionally, the processing unit 1002 is further configured to calculate, according to the second air interface rate capability and the planned RAN RTT, a second initial buffering delay supported by the base station, and a second cardinal duration ratio; The second initial buffering delay, the second cascading time ratio, and the second video experience score supported by the base station after the specified video source quality determination plan; if the second video experience score is greater than or equal to And the preset target value, the wireless quality between the planned base station and the UE meets the requirement.

The apparatus for detecting a wireless quality support video experience provided by the embodiment obtains an air interface rate capability between the base station and the user equipment and a round-trip delay of the radio side, and uses the two parameters to determine a video experience supported by the wireless air interface of the base station, and represents The video quality supported by the wireless quality between the base station and the user equipment finds the bottleneck of the wireless air interface, and accurately guides the wireless network planning according to the wireless air interface pipeline capability, ensuring that the wireless quality supports the best effect of the video experience.

Referring to FIG. 11, the present application further provides a network device for implementing the method steps in the foregoing embodiments.

The network device may be composed of a transceiver 1101, a processor 1102, a memory 1103, and the like.

The processor 1102 is a control center of the network device, and connects various parts of the entire network device by using various interfaces and lines, by running or executing software programs and/or modules stored in the memory, and calling data stored in the memory, Perform various functions and/or process data of the network side device.

The processor 1102 can be a central processing unit (CPU), a network processor (NP), or a combination of a CPU and an NP. The processor may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a general array logic (GAL), or any combination thereof.

The memory 1103 may include a volatile memory such as a random access memory (RAM); and may also include a non-volatile memory such as a flash memory. A hard disk drive (HDD) or a solid state drive (SSD); the memory may also include a combination of the above types of memories.

The transceiver 1101 can be configured to receive or transmit data, and the transceiver can transmit data to various nodes or other devices in the video network system under the control of the processor, and receive each node or under the control of the processor. Data sent by other devices.

In the embodiment of the present application, the transceiver 1101 may be configured to implement network information for receiving a wireless node in a network in the foregoing embodiment, where the network information includes an air interface rate capability and a RAN for transmitting data between the base station and the user equipment UE. RTT. The functions to be implemented by the acquisition unit 1001 in the foregoing device embodiment may be implemented by the transceiver 1101 of the network device or by the processor 1102 controlling the transceiver 1101. The treatment The functionality to be implemented by unit 1002 can also be implemented by processor 1102 of the network device.

In a specific implementation, the present application further provides a computer storage medium, wherein the computer storage medium may store a program, where the program may include a part of each embodiment of the method for detecting a wireless quality support video experience provided by the application. Or all steps. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

In various embodiments of the present application, the UE may also be referred to as a terminal, a mobile station (MS), a mobile terminal (MT), a remote terminal (RT), and a connection. Access terminal (AT), user agent (UA), etc. The UE may communicate with one or more core networks via a radio access network (RAN), or may access the distributed network in an ad hoc or unlicensed manner, and the UE may also access the wireless network through other means. For the communication, the UE can also directly perform wireless communication with other UEs, which is not limited in this embodiment of the present invention.

The UE may be a mobile phone, a tablet (Pad), a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, and an industrial control (industrial) Wireless terminal in control), wireless terminal in self driving, wireless terminal in remote medical, wireless terminal in smart grid, wireless in transport safety A terminal, a wireless terminal in a smart city, a wireless terminal in a smart home, and the like.

The base station may be an enhanced base station, or a relay having a scheduling function, or a device having a base station function, or the like. The base station may be an evolved base station (evolved Node B, eNB) in the network system, or may be a base station in other systems, which is not limited in this embodiment.

Those skilled in the art can clearly understand that the technology in the embodiments of the present application can be implemented by means of software plus a necessary general hardware platform. Based on such understanding, the technical solution in the embodiments of the present application may be embodied in the form of a software product in essence or in the form of a software product, and the computer software product may be stored in a storage medium such as a ROM/RAM. , a diskette, an optical disk, etc., including instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments of the present application or portions of the embodiments.

The same and similar parts between the various embodiments in this specification can be referred to each other. In particular, for the above embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant points can be referred to the description in the method embodiment.

The embodiments of the invention described above are not intended to limit the scope of the invention.

Claims (16)

1. A method for detecting a wireless quality support video experience, characterized in that the method comprises:

   Obtaining network information of a wireless node in the network, where the network information includes a first air interface rate capability for transmitting data between the base station and the user equipment UE, and a first radio side round-trip delay RAN RTT;

   Calculating, according to the first air interface rate capability and the first RAN RTT, a first initial buffering delay supported by the base station, and calculating, according to the first air interface rate capability, a ratio of a first time duration supported by the base station ;

   Determining, by using the first initial buffering delay, the first cardon duration ratio, and the specified video source quality, a first video experience score supported by the base station wireless air interface;

   Determining whether the first video experience score is less than a preset target value, and if it is less than the preset target value, determining that the radio quality between the base station and the UE cannot meet the requirement.
2. The method according to claim 1, wherein the acquiring the first air interface rate capability in the network information comprises:

   Obtaining a first air interface rate capability supported by the base station, where the air interface rate capability is an average transmission rate obtained when each of the UEs transmits data in at least one UE covered by the base station.
3. The method according to claim 1, wherein the acquiring the first RAN RTT comprises:

   Obtaining a first moment that is sent by the server in the network to the UE to negotiate a packet SYNACK;

   Obtaining a second moment that the UE responds to the SYNACK and sends the SYNACKACK to the server;

   Calculating the first RAN RTT between the UE and the base station according to the first moment and the second moment.
4. The method according to claim 1, wherein calculating the first initial buffering delay supported by the base station according to the first air interface rate capability and the first RAN RTT comprises:

   Get the specified video source;

   Obtaining a video source parameter according to the specified video source;

   Establishing an initial buffer model by using the video source parameters and a data flow required for initial buffering of the video source;

   And calculating the first initial buffering delay according to the first air interface rate capability, the first RAN RTT, and the initial buffering model.
5. The method according to claim 1, wherein calculating a ratio of the duration of the card support supported by the base station according to the first air interface rate capability comprises:

   Get the specified video source;

   Obtaining a video source parameter according to the specified video source;

   Establishing a carton duration ratio model supported by the base station by using the video source parameter and a process of a video playing phase of the video source;

   Calculating the first cardon duration ratio according to the first air interface rate capability and the Carton duration ratio model.
6. The method according to any one of claims 1-5, wherein if the video experience score is smaller than the preset target value, the method further comprises:

   Establishing a function model of the first RAN RTT and a key performance indicator KPI of the network;

   After the simulation is planned, network KPI information is obtained, where the network KPI information includes a second air interface rate capability;

   The planned second RAN RTT is calculated using the network KPI information and the second air interface rate capability and the function model.
7. The method of claim 6 wherein the method further comprises:

   Calculating, according to the second air interface rate capability and the planned RAN RTT, a second initial buffering delay supported by the base station, and a second cardon duration ratio;

   Determining, by the second initial buffering delay, the second aging time ratio, and the specified video source quality, a second video experience score supported by the base station after the planning;

   If the second video experience score is greater than or equal to the preset target value, the wireless quality between the planned base station and the UE satisfies the requirement.
8. A device for detecting a wireless quality support video experience, characterized in that the device comprises:

   An acquiring unit, configured to acquire network information of a wireless node in a network, where the network information includes a first air interface rate capability for transmitting data between the base station and the user equipment UE, and a first radio side round-trip delay RAN RTT;

   a processing unit, configured to calculate, according to the first air interface rate capability and the first RAN RTT, a first initial buffering delay supported by the base station, and calculate, according to the first air interface rate capability, a first supported by the base station Carton time ratio;

   The processing unit is further configured to determine, by using the first initial buffering delay, the first cardon duration ratio, and the specified video source quality, the first video experience score supported by the base station wireless air interface;

   The processing unit is further configured to determine whether the first video experience score is less than a preset target value, and if it is less than the preset target value, determine that the radio quality between the base station and the UE cannot meet the requirement.
9. The device of claim 8 wherein:

   The acquiring unit is configured to acquire a first air interface rate capability supported by the base station, where the air interface rate capability is an average transmission rate obtained when each of the UEs transmits data in at least one UE covered by the base station .
10. The device of claim 8 wherein:

    The acquiring unit is further configured to acquire a first time that is sent by the server in the network to the UE to negotiate a SYNACK, and acquire a second time that the UE responds to the SYNACK and sends the SYNACKACK to the server, and And calculating, according to the first time and the second time, the first RAN RTT between the UE and the base station.
11. The device of claim 8 wherein:

    The processing unit is further configured to obtain a specified video source, obtain a video source parameter according to the specified video source, and establish an initial buffer model by using the video source parameter and a data flow required for initial buffering of the video source; Calculating the first initial buffering delay by describing the first air interface rate, the first RAN RTT, and the initial buffering model.
12. The device of claim 8 wherein:

    The processing unit is further configured to obtain a specified video source, obtain a video source parameter according to the specified video source, and use the video source parameter and a video playback phase of the video source to establish a card support time supported by the base station. a long-term ratio model; calculating the first cardon duration ratio according to the first air interface rate and the Karten duration ratio model.
13. A device according to any one of claims 8-12, wherein

    The processing unit is further configured to: if the video experience score is smaller than the preset target value, establish a function model of the first RAN RTT and a key performance indicator KPI of the network; and obtain network KPI information after simulation planning, The network KPI information includes a second air interface rate capability; the planned second RAN RTT is calculated by using the network KPI information and the second air interface rate capability and the function model.
14. The device of claim 13 wherein:

    The processing unit is further configured to calculate, according to the second air interface rate capability and the planned RAN RTT, a second initial buffering delay supported by the base station, and a second camping duration ratio; And a second video experience score supported by the base station after the specified video source quality determination plan; if the second video experience score is greater than or equal to the pre-predetermined If the target value is set, the wireless quality between the planned base station and the UE satisfies the requirement.
15. A network device, comprising the apparatus for detecting a wireless quality support video experience according to any one of claims 8 to 14.
16. A computer readable storage medium, comprising: instructions that, when executed on a computer, cause the computer to perform the method of any one of claims 1 to method.

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