CN108769760B

CN108769760B - Code rate adjustment method, UE, MEC and network system

Info

Publication number: CN108769760B
Application number: CN201810503075.XA
Authority: CN
Inventors: 韩赛; 马红兵; 陈丹; 秦钧; 王友祥; 范斌; 乌云霄; 余智
Original assignee: China United Network Communications Group Co Ltd
Current assignee: China United Network Communications Group Co Ltd
Priority date: 2018-05-23
Filing date: 2018-05-23
Publication date: 2021-03-12
Anticipated expiration: 2038-05-23
Also published as: CN108769760A

Abstract

The embodiment of the invention provides a code rate adjusting method, UE, MEC and a network system, relates to the technical field of communication, and solves the problems that in the prior art, when a user watches a specified video through a webpage or an APP, when the user manually selects a definition, such as high definition, the user selection is always followed in the playing process, and when the network condition can not meet the selection of the user, the user is stuck and the watching experience of the user is influenced. The method comprises the steps that when a MEC receives a first message which is sent by UE and carries at least one optional code rate for starting video code rate adaptation and appointing a video, a second message responding to the first message is sent to the UE; the MEC receives an evaluation item list sent by the UE according to the reporting period in the second message; and the MEC sends a fourth message carrying the adjusted code rate to the UE. The embodiment of the invention is used for manufacturing the MEC.

Description

Code rate adjustment method, UE, MEC and network system

Technical Field

The invention relates to the technical field of video playing, in particular to a code rate adjusting method, UE, MEC and a network system.

Background

With the advancement of technology, video streaming media services have been rapidly developed in the internet field, and become one of the most important services of network service providers as video services already occupy most of the traffic on the internet.

At present, most of domestic network service providers provide video playing for users through web pages or Application programs (Application, APP for short); for example, taking an example that a user plays a video through an APP, the APP generally plays the video according to a code rate set when the user uses the APP last time or a code rate set when the user uses the APP this time; the efficiency of the air interface wireless resource is influenced by the number of service users, the coverage interference condition of a user terminal and other conditions; statistically, in the video watching process, if the video is frequently jammed, the user has a high possibility to choose not to watch the specified video any more. The reason why the video segment is jammed is that the bandwidth cannot meet the downloading speed of the video segment, most users prefer to select low-definition smooth and prefer high-definition accompanied by the jamming, most domestic video APPs such as Tencent and Aiqi are not provided with the self-adaptive definition conversion function at present, namely once the user manually selects one definition such as high-definition, the user selection is always followed in the playing process, and when the network condition cannot meet the user selection, the jamming occurs, so that the watching experience of the user is influenced.

Therefore, in the prior art, when a user watches a specified video through a webpage or an APP, when the user manually selects a definition, such as high definition, the user will always follow the selection of the user in the playing process, and when the network condition cannot meet the selection of the user, the user will be stuck and the watching experience of the user is affected.

Disclosure of Invention

Embodiments of the present invention provide a code rate adjustment method, a UE, an MEC, and a network system, which solve the problem in the prior art that when a user watches a specific video through a web page or an APP, the user will always follow the user's selection in the playing process when the user manually selects a definition, such as high definition, and the user's watching experience is affected due to the fact that the user is stuck when the network condition cannot meet the user's selection.

In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:

in a first aspect, an embodiment of the present invention provides a method for adjusting a code rate, including: when receiving a first message which is sent by UE and carries at least one optional code rate for starting video code rate adaptation and appointing a video, the MEC sends a second message responding to the first message to the UE; wherein the second message comprises at least one or more of: the second message is used for indicating the UE to send the evaluation item list to the MEC according to the reporting period; wherein the evaluation item list at least comprises one or more of the following parameters: appointing the current playing code rate, the downloading rate, the RSRP value, the SINR value and the pause frequency of the video, wherein the pause frequency is equal to the ratio of pause time to preset time; the MEC receives a third message sent by the UE according to the reporting period in the second message; wherein the third message comprises: evaluating a measured value of at least one parameter in the list of items; the MEC sends a fourth message carrying the adjusted code rate to the UE; and the fourth message is used for indicating the UE to play the specified video according to the adjusted code rate in the fourth message, and the adjusted code rate is determined according to at least one optional code rate in the first message and the evaluation item list in the third message.

Optionally, the reporting period includes at least one acquisition point, and the parameters acquired by each acquisition point at least include one or more of the following: appointing the current playing code rate, the downloading rate, the RSRP value, the SINR value and the pause frequency of the video, wherein the pause frequency is equal to the ratio of pause time to preset time; the evaluation item list includes: measured values of the parameters acquired at the at least one acquisition point; the MEC sends a fourth message carrying the adjusted code rate to the UE, including: the MEC determines a definition grade corresponding to at least one optional code rate of the designated video and a definition grade corresponding to the current playing code rate of the designated video according to a code rate adjustment algorithm configuration table, at least one optional code rate of the designated video in the first message and the current playing code rate of the designated video in the third message; wherein, the code rate adjustment algorithm configuration table comprises: the corresponding relation between the definition grade and the code rate interval; the MEC acquires parameters of each acquisition point in at least one acquisition point; the MEC determines the evaluation result of each acquisition point according to the parameters of each acquisition point; wherein, the evaluation result comprises: lifting the definition, reducing the definition and keeping the current definition; the MEC determines the evaluation result of the reporting period according to the evaluation result of at least one acquisition point in the reporting period; the MEC determines an evaluation result of a preset period according to the evaluation result of at least one reporting period in the preset period; and the MEC determines the adjusted code rate according to the evaluation result of the preset period, the definition level corresponding to at least one optional code rate of the appointed video and the definition level corresponding to the current playing code rate of the appointed video, and sends a fourth message carrying the adjusted code rate to the UE.

Optionally, the code rate adjustment algorithm configuration table further includes: definition level and RSRP threshold, SINR threshold, and base coefficient K₀Approximation coefficient K₁Distance coefficient K₂And a correspondence to a stuck frequency threshold; the MEC determines an evaluation result of each acquisition point according to the parameters of each acquisition point, and the evaluation result comprises the following steps: when determining that an acquisition point which is not matched with each code rate interval in a code rate adjustment algorithm configuration table exists, the MEC determines that the evaluation result of the acquisition point is to keep the current definition; when determining that the acquisition point meeting the first condition exists, the MEC determines that the evaluation result of the acquisition point is the lifting definition; wherein the first condition comprises: the RSRP value is greater than or equal to an RSRP threshold value corresponding to the definition level corresponding to at least one optional code rate of the designated video and higher than the definition level corresponding to the current playing code rate of the designated video, the SINR value is greater than or equal to an SINR threshold value corresponding to the definition level corresponding to at least one optional code rate of the designated video and higher than the definition level corresponding to the current playing code rate of the designated video, and the pause frequency is less than or equal to the pause frequency threshold value corresponding to at least one optional code rate of the designated video and higher than the pause frequency threshold value corresponding to the definition level corresponding to the current playing code rate of the designated video and

wherein V represents the current download rate, b represents the current play code rate, and K₀A basic coefficient, K, corresponding to the definition level corresponding to the current playing code rate₁An approximation coefficient, K, corresponding to the definition level corresponding to the current playing code rate₀Greater than 0, K₁Greater than 0;

when the MEC determines that the acquisition points meeting the second condition exist, determining that the evaluation result of the acquisition points is the reduced definition; wherein the second condition comprises: the RSRP value is smaller than the current definition grade lower than the designated video in the definition grade corresponding to at least one optional code rate of the designated videoThe RSRP threshold corresponding to the definition level corresponding to the playing code rate, or the SINR value is less than the SINR threshold corresponding to the definition level corresponding to the current playing code rate of the designated video in the definition levels corresponding to the at least one optional code rate of the designated video, or the stuck frequency is greater than the stuck frequency threshold corresponding to the definition level corresponding to the current playing code rate of the designated video in the definition levels corresponding to the at least one optional code rate of the designated video and is less than the stuck frequency threshold corresponding to the definition level corresponding to the current playing code rate of the designated video

Wherein, K₂A distance coefficient, K, corresponding to the definition level corresponding to the current playing code rate₂Greater than 0; and when the MEC determines that the acquisition points which do not meet the first condition and the second condition exist, determining that the evaluation result of the acquisition points is to keep the current definition.

Optionally, the determining, by the MEC, the evaluation result of the reporting period according to the evaluation result of the at least one acquisition point in the reporting period includes: when determining that the evaluation result of at least one acquisition point in the reporting period meets a third condition, the MEC determines that the evaluation result of the reporting period is lifting definition; wherein the third condition includes: the number of the acquisition points of which the evaluation result is the lifting definition in the reporting period is greater than that of the acquisition points of which the evaluation result is the lowering definition in the reporting period, and the number of the acquisition points of which the evaluation result is the lifting definition in the reporting period is greater than that of the acquisition points of which the evaluation result is the keeping of the current definition in the reporting period; when the MEC determines that the evaluation result of at least one acquisition point in the reporting period meets the fourth condition, determining that the evaluation result of the reporting period is the definition reduction; wherein the fourth condition comprises: the number of the acquisition points with the evaluation result of reducing the definition in the reporting period is greater than the number of the acquisition points with the evaluation result of lifting the definition in the reporting period, and the number of the acquisition points with the evaluation result of reducing the definition in the reporting period is greater than the number of the acquisition points with the evaluation result of maintaining the current definition in the reporting period; and when the MEC determines that the evaluation result of at least one acquisition point in the reporting period does not meet the third condition and the fourth condition, determining that the evaluation result of the reporting period keeps the current definition.

Optionally, the determining, by the MEC, the evaluation result of the preset period according to the evaluation result of the at least one reporting period in the preset period includes: when the MEC determines that the evaluation result of at least one reporting period in the preset period meets a fifth condition, determining that the evaluation result of the preset period is the lifting definition; wherein the fifth condition comprises: the number of reporting periods with the lifting definition as an evaluation result in a preset period is greater than the number of reporting periods with the lifting definition as an evaluation result in a preset period, and the evaluation result of the last reporting period is the lifting definition; when determining that the evaluation result of at least one reporting period in the preset period meets the sixth condition, the MEC determines that the evaluation result of the preset period is to reduce the definition; wherein the sixth condition comprises: the number of reporting periods with the evaluation result of reducing the definition in the preset period is larger than the number of reporting periods with the evaluation result of lifting the definition in the preset period, and the evaluation result of the last reporting period is reducing the definition; and when the MEC determines that the evaluation result of at least one reporting period in the preset period does not meet the fifth condition and the sixth condition, determining that the evaluation result of the preset period keeps the current definition.

Optionally, the MEC determines the adjusted code rate according to the evaluation result of the preset period, the definition level corresponding to at least one optional code rate of the designated video, and the definition level corresponding to the currently played code rate of the designated video, and sends a fourth message carrying the adjusted code rate to the UE, including: when the MEC determines that the evaluation result of the preset period is lifting definition and a definition grade higher than the current playing code rate exists in the definition grades of at least one optional code rate, the MEC determines that the adjusted code rate is the optional code rate corresponding to the definition grade higher than the current playing code rate and sends a fourth message carrying the optional code rate corresponding to the definition grade higher than the current playing code rate to the UE; or when the MEC determines that the evaluation result of the preset period is that the definition is reduced and a definition grade lower than the current playing code rate exists in the definition grades of at least one optional code rate, determining that the adjusted code rate is the optional code rate corresponding to the definition grade lower than the current playing code rate, and sending a fourth message carrying the optional code rate corresponding to the definition grade lower than the current playing code rate to the UE; or, when determining that the evaluation result of the preset period is to maintain the current definition, the MEC determines that the adjusted code rate is the current playing code rate reported in the last reporting period in the preset period, and sends a fourth message carrying the current playing code rate reported in the last reporting period in the preset period to the UE.

A second aspect and an embodiment of the present invention provide a method for adjusting a code rate, including: when the UE determines to establish connection with a server and receives at least one video data packet of a designated video requested by the UE and sent by the server, sending a first message carrying at least one optional code rate for starting video code rate adaptation and the designated video to the MEC; the UE receives a second message sent by the MEC in response to the first message; wherein the second message comprises at least one or more of: the second message is used for indicating the UE to send the evaluation item list to the MEC according to the reporting period; wherein the evaluation item list at least comprises one or more of the following parameters: appointing the current playing code rate, the downloading rate, the RSRP value, the SINR value and the pause frequency of the video, wherein the pause frequency is equal to the ratio of pause time to preset time; the UE determines whether video code rate adaptation is needed or not according to the playing time length and the time length threshold of the designated video in the second message; when the UE determines that the playing time length is greater than or equal to the time length threshold value, the UE sends a third message to the MEC according to the reporting period in the second message; wherein the third message comprises: evaluating a measured value of at least one parameter in the list of items; the UE receives a fourth message which is sent by the MEC and carries the adjusted code rate; and the MEC determines the adjusted code rate according to at least one optional code rate in the first message and the evaluation item list sent by the UE.

Optionally, the method further includes: when receiving the fourth message sent by the MEC, the UE sends a fifth message carrying the adjusted code rate to the server after receiving the video data packet if the video data packet of the designated video sent by the server is being downloaded; the fifth message is used for indicating the server to send the next video data packet according to the adjusted code rate carried in the fifth message; or when receiving the fourth message sent by the MEC, the UE sends a fifth message carrying the adjusted code rate to the server if the video data packet of the designated video sent by the server is being downloaded; and the fifth message is used for indicating the server to send the video data packet of the current specified video according to the adjusted code rate carried in the fifth message.

In a third aspect, embodiments of the present invention provide an MEC, comprising: the processing module is used for controlling the sending module to send a second message responding to the first message to the UE when the receiving module receives the first message which is sent by the UE and carries at least one optional code rate for starting video code rate adaptation and appointing a video; wherein the second message comprises at least one or more of: the second message is used for indicating the UE to send the evaluation item list to the MEC according to the reporting period; wherein the evaluation item list at least comprises one or more of the following parameters: appointing the current playing code rate, the downloading rate, the RSRP value, the SINR value and the pause frequency of the video, wherein the pause frequency is equal to the ratio of pause time to preset time; the receiving module is further used for receiving a third message sent by the UE according to the reporting period in the second message; wherein the third message evaluates the measured value of the at least one parameter in the item list; the processing module is further used for controlling the sending module to send a fourth message carrying the adjusted code rate to the UE; the fourth message is used for instructing the UE to play the designated video according to the adjusted code rate in the fourth message, and the adjusted code rate is determined according to at least one optional code rate in the first message received by the receiving module and the evaluation item list in the third message received by the receiving module.

Optionally, the reporting period includes at least one acquisition point, and the parameters acquired by each acquisition point at least include one or more of the following: appointing the current playing code rate, the downloading rate, the RSRP value, the SINR value and the pause frequency of the video, wherein the pause frequency is equal to the ratio of pause time to preset time; the evaluation item list includes: measured values of the parameters acquired at the at least one acquisition point; the processing module is specifically used for determining a definition grade corresponding to at least one optional code rate of the designated video and a definition grade corresponding to the current playing code rate of the designated video according to a code rate adjustment algorithm configuration table, at least one optional code rate of the designated video in the first message received by the receiving module and the current playing code rate of the designated video in the third message received by the receiving module; wherein, the code rate adjustment algorithm configuration table comprises: the corresponding relation between the definition grade and the code rate interval; the acquisition module is also used for acquiring the parameters of each acquisition point in at least one acquisition point; the processing module is further used for determining the evaluation result of each acquisition point according to the parameter of each acquisition point acquired by the acquisition module; wherein, the evaluation result comprises: lifting the definition, reducing the definition and keeping the current definition; the processing module is further used for determining the evaluation result of the reporting period according to the evaluation result of at least one acquisition point in the reporting period; the processing module is further used for determining the evaluation result of the preset period according to the evaluation result of at least one reporting period in the preset period; and the processing module is further used for determining the adjusted code rate according to the evaluation result of the preset period, the definition level corresponding to at least one optional code rate of the designated video and the definition level corresponding to the current playing code rate of the designated video, and controlling the sending module to send a fourth message carrying the adjusted code rate to the UE.

Optionally, the code rate adjustment algorithm configuration table further includes: definition level and RSRP threshold, SINR threshold, and base coefficient K₀Approximation coefficient K₁Distance coefficient K₂And a correspondence to a stuck frequency threshold; the processing module is specifically used for determining that the evaluation result of the acquisition point is the current definition when the acquisition point which is not matched with each code rate interval in the code rate adjustment algorithm configuration table is determined to exist; the processing module is specifically used for determining that the evaluation result of the acquisition point is lifting definition when the acquisition point meeting the first condition is determined to exist; wherein the first condition comprises: the RSRP value is greater than or equal to the RSR corresponding to the definition grade corresponding to at least one optional code rate of the designated video and higher than the definition grade corresponding to the current playing code rate of the designated videoThe SINR value is greater than or equal to the SINR threshold value corresponding to the definition level corresponding to the at least one optional code rate of the designated video and higher than the SINR threshold value corresponding to the definition level corresponding to the current playing code rate of the designated video, and the stuck frequency is less than or equal to the stuck frequency threshold value corresponding to the definition level corresponding to the at least one optional code rate of the designated video and higher than the stuck frequency threshold value corresponding to the definition level corresponding to the current playing code rate of the designated video and

wherein V represents the current download rate, b represents the current play code rate, and K₀A basic coefficient, K, corresponding to the definition level corresponding to the current playing code rate₁An approximation coefficient, K, corresponding to the definition level corresponding to the current playing code rate₀Greater than 0, K₁Greater than 0; the processing module is specifically used for determining that the evaluation result of the acquisition point is the reduced definition when the acquisition point meeting the second condition is determined to exist; wherein the second condition comprises: the RSRP value is smaller than an RSRP threshold value corresponding to a definition grade corresponding to a current playing code rate of the designated video in a definition grade corresponding to at least one optional code rate of the designated video, or the SINR value is smaller than an SINR threshold value corresponding to a definition grade corresponding to a current playing code rate of the designated video in a definition grade corresponding to at least one optional code rate of the designated video, or the stuck frequency is greater than a stuck frequency threshold value corresponding to a definition grade corresponding to a current playing code rate of the designated video in a definition grade corresponding to at least one optional code rate of the designated video and is lower than the stuck frequency threshold value corresponding to a definition grade corresponding to a current playing code rate of the designated video

Wherein, K₂A distance coefficient, K, corresponding to the definition level corresponding to the current playing code rate₂Greater than 0; and the processing module is specifically used for determining that the evaluation result of the acquisition point is to keep the current definition when the acquisition point which does not meet the first condition and the second condition is determined to exist.

Optionally, the processing module is specifically configured to determine that the evaluation result of the reporting period is the lifting definition when it is determined that the evaluation result of the at least one acquisition point in the reporting period meets a third condition; wherein the third condition includes: the number of the acquisition points of which the evaluation result is the lifting definition in the reporting period is greater than that of the acquisition points of which the evaluation result is the lowering definition in the reporting period, and the number of the acquisition points of which the evaluation result is the lifting definition in the reporting period is greater than that of the acquisition points of which the evaluation result is the keeping of the current definition in the reporting period; the processing module is specifically configured to determine that the evaluation result of the reporting period is reduced in definition when it is determined that the evaluation result of the at least one acquisition point in the reporting period satisfies a fourth condition; wherein the fourth condition comprises: the number of the acquisition points with the evaluation result of reducing the definition in the reporting period is greater than the number of the acquisition points with the evaluation result of lifting the definition in the reporting period, and the number of the acquisition points with the evaluation result of reducing the definition in the reporting period is greater than the number of the acquisition points with the evaluation result of maintaining the current definition in the reporting period; and the processing module is specifically configured to determine that the evaluation result of the reporting period is to maintain the current definition when it is determined that the evaluation result of the at least one acquisition point in the reporting period does not satisfy the third condition and the fourth condition.

Optionally, the processing module is specifically configured to determine that the evaluation result of the preset period is the lifting definition when it is determined that the evaluation result of at least one reporting period in the preset period meets a fifth condition; wherein the fifth condition comprises: the number of reporting periods with the lifting definition as an evaluation result in a preset period is greater than the number of reporting periods with the lifting definition as an evaluation result in a preset period, and the evaluation result of the last reporting period is the lifting definition; the processing module is specifically configured to determine that the evaluation result of the preset period is to reduce the definition when it is determined that the evaluation result of at least one reporting period in the preset period meets a sixth condition; wherein the sixth condition comprises: the number of reporting periods with the evaluation result of reducing the definition in the preset period is larger than the number of reporting periods with the evaluation result of lifting the definition in the preset period, and the evaluation result of the last reporting period is reducing the definition; and the processing module is specifically configured to determine that the evaluation result of the preset period is to maintain the current definition when it is determined that the evaluation result of at least one reporting period in the preset period does not satisfy the fifth condition and the sixth condition.

Optionally, the processing module is specifically configured to determine that the adjusted code rate is the optional code rate corresponding to the definition level higher than the current playing code rate when it is determined that the evaluation result of the preset period is the lifting definition and there is a definition level higher than the current playing code rate in the definition levels of the at least one optional code rate, and control the sending module to send a fourth message carrying the optional code rate corresponding to the definition level higher than the current playing code rate to the UE; or the processing module is specifically configured to determine that the adjusted code rate is the optional code rate corresponding to the definition level lower than the current playing code rate when it is determined that the evaluation result of the preset period is that the definition is reduced and a definition level lower than the current playing code rate exists in the definition levels of the at least one optional code rate, and control the sending module to send a fourth message carrying the optional code rate corresponding to the definition level lower than the current playing code rate to the UE; or, the processing module is specifically configured to, when it is determined that the evaluation result of the preset period is that the current definition is maintained, determine that the adjusted code rate is the current playing code rate reported in the last reporting period in the preset period, and control the sending module to send a fourth message carrying the current playing code rate reported in the last reporting period in the preset period to the UE.

In a fourth aspect, an embodiment of the present invention provides a UE, including: the processing module is used for controlling the sending module to send a first message carrying at least one optional code rate for starting video code rate adaptation and the designated video to the MEC when the connection with the server is determined and the receiving module receives at least one video data packet of the designated video requested by the UE and sent by the server; the receiving module is further used for receiving a second message sent by the MEC in response to the first message; wherein the second message comprises at least one or more of: the second message is used for indicating the UE to send the evaluation item list to the MEC according to the reporting period; wherein the evaluation item list includes at least one or more of: appointing the current playing code rate, the downloading rate, the RSRP value, the SINR value and the pause frequency of the video, wherein the pause frequency is equal to the ratio of pause time to preset time; the processing module is further used for determining whether video code rate adaptation needs to be carried out according to the playing duration and the duration threshold of the specified video in the second message received by the receiving module; the processing module is further configured to control the sending module to send a third message to the MEC according to a reporting period in the second message received by the receiving module when it is determined that the playing duration is greater than or equal to the duration threshold; wherein the third message comprises: evaluating a measured value of at least one parameter in the list of items; the receiving module is further configured to receive a fourth message carrying the adjusted code rate and sent by the MEC; and the MEC determines the adjusted code rate according to at least one optional code rate in the first message and the evaluation item list sent by the UE.

Optionally, the processing module is further configured to, when the receiving module receives the fourth message sent by the MEC, if a video data packet of a specified video sent by the server is being downloaded, control the sending module to send a fifth message carrying the adjusted code rate to the server after the video data packet is received; the fifth message is used for indicating the server to send the next video data packet according to the adjusted code rate carried in the fifth message; or, the processing module is further configured to, when the receiving module receives the fourth message sent by the MEC, control the sending module to send a fifth message carrying the adjusted code rate to the server if the video data packet of the specified video sent by the server is being downloaded; and the fifth message is used for indicating the server to send the video data packet of the current specified video according to the adjusted code rate carried in the fifth message.

A fifth aspect and an embodiment of the present invention provide a network system, including: any UE, base station, any MEC, and server as provided in the third aspect.

The embodiment of the invention provides a code rate adjusting method, UE, MEC and a network system, when a user watches a specified video by using a webpage or APP of the UE, if the UE determines that video code rate adaptation needs to be started, the MEC instructs the UE to send an evaluation item list to the MEC according to a reporting period, so that the MEC can determine an adjusted code rate according to the evaluation item list reported by the UE and further instructs the UE to play the specified video according to the adjusted code rate; the problem of in the prior art when the user watches appointed video through webpage or APP, when the user has manually selected a definition, for example high definition, will follow user's selection always in the broadcast process, when the network situation can't satisfy user's selection, will appear blocking, influence the user and watch the experience is solved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic diagram of a network architecture for a code rate adjustment method according to an embodiment of the present invention;

fig. 2 is a flowchart illustrating a method for adjusting a code rate according to an embodiment of the present invention;

FIG. 3 is a second flowchart illustrating a code rate adjustment method according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a logic operation flow of a code rate adjustment method according to an embodiment of the present invention;

fig. 5 is a schematic diagram illustrating an operation flow of a code rate adjustment method according to an embodiment of the present invention;

fig. 6 is a third schematic flow chart of a code rate adjustment method according to an embodiment of the present invention;

FIG. 7 is a fourth flowchart illustrating a method for adjusting a code rate according to an embodiment of the present invention;

FIG. 8 is a fifth flowchart illustrating a method for adjusting a code rate according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a UE according to an embodiment of the present invention;

fig. 10 provides a schematic structural diagram of an MEC according to an embodiment of the present invention.

Reference numerals:

UE-10；

a receiving module-101; a processing module-102; a sending module-103;

MEC-20；

a receiving module-201; a processing module-202; a sending module-203.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

A network architecture of a code rate adjustment method provided in an embodiment of the present invention is shown in fig. 1, and includes: user Equipment (UE), an evolution base station (eNodeB), Multi-access Edge Computing (MEC), a Core network (EPC) and a server, wherein the server comprises one or more of a local network, a third-party remote Internet server or a public network Internet; the embodiment of the invention provides a code rate adjusting method, UE, MEC and a network system, which can solve the problem that in the prior art, when a user watches a specified video through a webpage or an APP, the user needs to switch the code rate according to the smooth depth of the watched specified video, and the specific implementation mode is as follows:

example one

An embodiment of the present invention provides a method for adjusting a code rate, as shown in fig. 2 and 4, including:

s101, when receiving a first message which is sent by UE and carries at least one optional code rate for starting video code rate adaptation and appointing a video, an MEC sends a second message responding to the first message to the UE; wherein the second message comprises at least one or more of: the second message is used for indicating the UE to send the evaluation item list to the MEC according to the reporting period; wherein the evaluation item list at least comprises one or more of the following parameters: the current playing code rate, the downloading rate, the Reference Signal Receiving Power (RSRP) value, the Signal to Interference plus Noise Ratio (SINR) value and the pause frequency of the video are specified, wherein the pause frequency is equal to the Ratio of the pause time to the preset time.

It should be noted that the specified video refers to a video that the user needs to play, that is, a video that the user selects on a webpage or APP and needs to play.

S102, the MEC receives a third message sent by the UE according to the reporting period in the second message; wherein the third message comprises: a measured value of at least one parameter in the list of items is evaluated.

It should be noted that, in practical applications, the UE may collect at least one parameter in the evaluation item list, and send a measured value of the parameter to the MEC according to a reporting period; therefore, the MEC may determine the network state of the current UE according to at least one parameter in the evaluation item list sent by the UE, and further determine the play code rate (adjusted code rate) of the specified video played by the UE.

S103, the MEC sends a fourth message carrying the adjusted code rate to the UE; and the fourth message is used for indicating the UE to play the specified video according to the adjusted code rate in the fourth message, and the adjusted code rate is determined according to at least one optional code rate in the first message and the evaluation item list in the third message.

It should be noted that, in practical applications, step S101, step S102 and step S103 are generally called Video bit Rate Adaptation (VRA).

Specifically, as shown in fig. 3, an embodiment of the present invention provides a method for adjusting a code rate, where a reporting period includes at least one acquisition point, and parameters acquired by each acquisition point at least include one or more of the following: appointing the current playing code rate, the downloading rate, the RSRP value, the SINR value and the pause frequency of the video, wherein the pause frequency is equal to the ratio of pause time to preset time; the evaluation item list includes: at least one acquisition point acquires a measured value of a parameter.

S103, the MEC sends a fourth message carrying the adjusted code rate to the UE, including:

s1030, the MEC determines a definition grade corresponding to at least one optional code rate of the designated video and a definition grade corresponding to the current playing code rate of the designated video according to a code rate adjustment algorithm configuration table, at least one optional code rate of the designated video in the first message and the current playing code rate of the designated video in the third message; wherein, the code rate adjustment algorithm configuration table comprises: and the corresponding relation between the definition grade and the code rate interval.

Specifically, the code rate adjustment algorithm configuration table is shown in table 1.

TABLE 1

Exemplarily, the values of the parameters in the code rate adjustment algorithm configuration table are shown in table 2 (only values of some of the parameters are shown), and specific operation and maintenance personnel can set each definition level and video definition, code rate interval, RSRP threshold, SINR threshold, and basic coefficient K according to actual conditions₀Approximation coefficient K₁Distance coefficient K₂And a correspondence relationship of the stuck frequency threshold (N is an integer greater than or equal to 1), which is not limited herein.

TABLE 2

S1031, MEC obtains parameters of each acquisition point in at least one acquisition point.

S1032, the MEC determines the evaluation result of each acquisition point according to the parameter of each acquisition point; wherein, the evaluation result comprises: raise sharpness, lower sharpness, and maintain current sharpness.

S1033, the MEC determines the evaluation result of the reporting period according to the evaluation result of at least one acquisition point in the reporting period.

S1034 and MEC determine the evaluation result of the preset period according to the evaluation result of at least one reporting period in the preset period.

S1035, MEC determines the adjusted code rate according to the evaluation result of the preset period, the definition level corresponding to at least one optional code rate of the appointed video and the definition level corresponding to the current playing code rate of the appointed video, and sends a fourth message carrying the adjusted code rate to the UE.

Optionally, an embodiment of the present invention provides a code rate adjustment algorithm configuration table in a code rate adjustment method, further including: definition level and RSRP threshold, SINR threshold, and base coefficient K₀Approximation coefficient K₁Distance coefficient K₂And a stuck frequency threshold.

S1032, the MEC determines the evaluation result of each acquisition point according to the parameter of each acquisition point, and the evaluation result comprises the following steps:

s1032-1, when determining that the acquisition points which are not matched with each code rate interval in the code rate adjustment algorithm configuration table exist, determining the evaluation result of the acquisition points to keep the current definition.

S1032-2, when determining that the acquisition points meeting the first condition exist, determining that the evaluation result of the acquisition points is lifting definition; wherein the first condition comprises: the RSRP value is greater than or equal to an RSRP threshold value corresponding to the definition level corresponding to at least one optional code rate of the designated video and higher than the definition level corresponding to the current playing code rate of the designated video, the SINR value is greater than or equal to an SINR threshold value corresponding to the definition level corresponding to at least one optional code rate of the designated video and higher than the definition level corresponding to the current playing code rate of the designated video, and the pause frequency is less than or equal to the pause frequency threshold value corresponding to at least one optional code rate of the designated video and higher than the pause frequency threshold value corresponding to the definition level corresponding to the current playing code rate of the designated video and

wherein V represents the current download rate, b represents the current play code rate, and K₀A basic coefficient, K, corresponding to the definition level corresponding to the current playing code rate₁An approximation coefficient, K, corresponding to the definition level corresponding to the current playing code rate₀Greater than 0, K₁Greater than 0.

S1032-3, when determining that the acquisition points meeting the second condition exist, determining that the evaluation result of the acquisition points is the reduced definition; wherein the second condition comprises: the RSRP value is smaller than an RSRP threshold value corresponding to a definition grade corresponding to a current playing code rate of the designated video in a definition grade corresponding to at least one optional code rate of the designated video, or the SINR value is smaller than an SINR threshold value corresponding to a definition grade corresponding to a current playing code rate of the designated video in a definition grade corresponding to at least one optional code rate of the designated video, or the stuck frequency is greater than a stuck frequency threshold value corresponding to a definition grade corresponding to a current playing code rate of the designated video in a definition grade corresponding to at least one optional code rate of the designated video and is lower than the stuck frequency threshold value corresponding to a definition grade corresponding to a current playing code rate of the designated video

Wherein, K₂A distance coefficient, K, corresponding to the definition level corresponding to the current playing code rate₂Greater than 0.

S1032-4, when determining that there are acquisition points which do not satisfy the first condition and the second condition, the MEC determines that the evaluation result of the acquisition points is to maintain the current definition.

Optionally, an embodiment of the present invention provides a method for adjusting a code rate, where S1033 and an MEC determine an evaluation result of a reporting period according to an evaluation result of at least one acquisition point in the reporting period, where the method includes:

s1033-1, when the MEC determines that the evaluation result of at least one acquisition point in the reporting period meets a third condition, determining that the evaluation result of the reporting period is lifting definition; wherein the third condition includes: the number of acquisition points of which the evaluation result is the lifting definition in the reporting period is greater than the number of acquisition points of which the evaluation result is the lowering definition in the reporting period, and the number of acquisition points of which the evaluation result is the lifting definition in the reporting period is greater than the number of acquisition points of which the evaluation result is the keeping of the current definition in the reporting period.

For example, as shown in fig. 5, taking an example that the preset period is 120 seconds, the reporting period is 10 seconds, and the acquisition period of the acquisition point is 1 second, a specific implementation process is as follows:

as can be seen from the above, the preset period includes 12 reporting periods, each reporting period includes parameters acquired by 10 acquisition points, and for convenience, according to the sequence of the reporting periods, each reporting period is referred to as: a first reporting period, a second reporting period, a third reporting period, a fourth reporting period, a fifth reporting period, a sixth reporting period, a seventh reporting period, an eighth reporting period, a ninth reporting period, a tenth reporting period, an eleventh reporting period, and a twelfth reporting period.

And when the evaluation result of the acquisition point in the first reporting period is determined to be the lifting definition times of 6 times, the evaluation result is determined to be the definition reducing times of 2 times, and the evaluation result is determined to be the current definition keeping times of 2 times, determining that the evaluation result of the first reporting period is the lifting definition.

And when the evaluation result of the acquisition point in the second reporting period is determined to be the lifting definition times of 4 times, the evaluation result is determined to be the definition reducing times of 4 times, and the evaluation result is determined to be the current definition keeping times of 2 times, determining the evaluation result of the first reporting period to be the lifting definition.

And when the evaluation result of the acquisition point in the third reporting period is determined to be 2 times of lifting definition, 6 times of reducing definition and 2 times of maintaining the current definition, determining the evaluation result of the first reporting period to be reducing definition.

And when the evaluation result of the acquisition point in the fourth reporting period is determined to be the number of times of lifting definition is 1, the evaluation result is determined to be the number of times of reducing definition is 6, and the evaluation result is determined to be the number of times of keeping the current definition is 3, determining that the evaluation result of the first reporting period is the reduction of definition.

And when the evaluation result of the acquisition point in the fifth reporting period is determined to be 2 times of lifting definition, 5 times of reducing definition and 3 times of maintaining the current definition, determining that the evaluation result of the first reporting period is reduced definition.

And when the evaluation result of the acquisition point in the sixth reporting period is determined to be that the number of times of lifting the definition is 3, the number of times of reducing the definition is 3, and the number of times of keeping the current definition is 4, determining that the evaluation result of the first reporting period is to keep the current definition.

And when the evaluation result of the acquisition point in the seventh reporting period is determined to be that the number of times of lifting definition is 5, the number of times of reducing the definition is 3, and the number of times of keeping the current definition is 2, determining that the evaluation result of the first reporting period is lifting definition.

And when the evaluation result of the acquisition point in the eighth reporting period is determined to be 5 times of lifting definition, the evaluation result is determined to be 2 times of reducing definition, and the evaluation result is determined to be 3 times of maintaining the current definition, determining that the evaluation result of the first reporting period is lifting definition.

And when the evaluation result of the acquisition point in the ninth reporting period is determined to be that the number of times of lifting definition is 0, the number of times of reducing definition is 6, and the number of times of keeping the current definition is 4, determining that the evaluation result of the first reporting period is reduced definition.

And when the evaluation result of the acquisition point in the tenth reporting period is determined to be that the number of times of lifting definition is 4, the number of times of reducing definition is 5, and the number of times of keeping the current definition is 1, determining that the evaluation result of the first reporting period is reduced definition.

And when the evaluation result of the acquisition point in the eleventh reporting period is determined to be the number of times of lifting definition is 3, the evaluation result is determined to be the number of times of reducing definition is 6, and the evaluation result is determined to be the number of times of keeping the current definition is 1, determining that the evaluation result of the first reporting period is the reduction of definition.

And when the evaluation result of the acquisition point in the twelfth reporting period is determined to be 1 time of lifting definition, 5 times of reducing definition and 4 times of keeping the current definition, determining that the evaluation result of the first reporting period is reduced definition.

According to the scheme, the number of times of reporting the evaluation result of the period in the preset period, namely the lifting definition, is 4, the number of times of reporting the evaluation result, namely the reducing definition, is 7, and the number of times of reporting the evaluation result, namely the maintaining of the current definition, is 1; determining that the evaluation result of at least one reporting period in the preset period meets a sixth condition, and therefore determining that the evaluation result of the preset period is to reduce the definition; specifically, the manner of determining the evaluation result of the preset period as the lifting definition and the maintaining definition is similar to the method described above, and details are not repeated here.

S1033-2, when the MEC determines that the evaluation result of at least one acquisition point in the reporting period meets a fourth condition, determining that the evaluation result of the reporting period is the definition reduction; wherein the fourth condition comprises: the number of the acquisition points with the evaluation result of reducing the definition in the reporting period is larger than the number of the acquisition points with the evaluation result of lifting the definition in the reporting period, and the number of the acquisition points with the evaluation result of reducing the definition in the reporting period is larger than the number of the acquisition points with the evaluation result of keeping the current definition in the reporting period.

S1033-3, when the MEC determines that the evaluation result of at least one acquisition point in the reporting period does not meet the third condition and the fourth condition, determining that the evaluation result of the reporting period keeps the current definition.

Optionally, an embodiment of the present invention provides a method for adjusting a code rate, where S1034 and MEC determine an evaluation result of a preset period according to an evaluation result of at least one reporting period in the preset period, where the method includes:

s1034-1, when determining that the evaluation result of at least one reporting period in the preset period meets a fifth condition, determining that the evaluation result of the preset period is lifting definition; wherein the fifth condition comprises: the number of reporting periods with the evaluation result of lifting definition in the preset period is larger than the number of reporting periods with the evaluation result of reducing definition in the preset period, and the evaluation result of the last reporting period is lifting definition.

S1034-2, when the fact that the evaluation result of at least one reporting period in the preset period meets the sixth condition is determined, determining that the evaluation result of the preset period is the definition reduction; wherein the sixth condition comprises: the number of reporting periods with the evaluation result of reducing the definition in the preset period is larger than the number of reporting periods with the evaluation result of lifting the definition in the preset period, and the evaluation result of the last reporting period is reducing the definition.

S1034-3, when the fact that the evaluation result of at least one reporting period in the preset period does not meet the fifth condition and the sixth condition is determined, the fact that the current definition is kept is determined as the evaluation result of the preset period.

It should be noted that, in practical applications, because the code rate standards of the video resources provided by different servers are different, the specific definition levels of the video resources provided by different servers need to be determined through a definition table; exemplary, such as: all selectable resolutions and corresponding code rates include: 80kbps, 720kbps, 2000kbps, the definition and bitrate interval in the bitrate adjustment algorithm table are as shown in table 2, therefore, designating the video corresponding level includes: level 1 (resolution of 360P), level 3 (resolution of 720P), and level 5 (resolution of 2K).

Assuming that a user currently uses 360P (80kbps) to play a specified video, at this time, when the MEC judges, the selectable bitrate corresponding to a level higher than the current bitrate of playing is 720P (720 kbps); if the user currently uses 720P (720kbps) to play the designated video, at this time, when the MEC is in judgment, the selectable definition and code rate corresponding to the definition level higher than the current playing code rate is 2K (2000kbps), and the selectable definition and code rate corresponding to the definition level lower than the current playing code rate is 360P (80 kbps); that is, when determining the adjusted bitrate, the MEC selects a level higher or lower than the current level from the determined levels according to the definition level corresponding to at least one selectable bitrate of the designated video and the definition level corresponding to the current playing bitrate of the designated video, and then takes the bitrate corresponding to the level as the adjusted bitrate.

Specifically, when the MEC receives a video request sent by the UE to stop playing the specified video, the MEC sends a sixth data packet carrying a termination VRA to the UE, so that the UE stops determining whether the code rate adjustment is required for the specified video.

Specifically, when data in the evaluation item list reported by the UE is abnormal (generally referred to as abnormal trigger), a sixth data packet carrying a termination VRA is sent to the UE, so that the UE stops determining whether code rate adjustment is required for the pointed video.

Specifically, when the user views the specified video through the UE, the UE sends an HTTP request (including no need of performing VRA) to the MEC, and when the MEC receives the HTTP request, the MEC returns an HTTP response 200OK to the UE.

Optionally, in the method for adjusting a bitrate provided in the embodiment of the present invention, the step of S1035 and the MEC determining the adjusted bitrate according to the evaluation result of the preset period, the definition level corresponding to at least one optional bitrate of the designated video, and the definition level corresponding to the currently played bitrate of the designated video, and sending a fourth message carrying the adjusted bitrate to the UE includes:

s1035-1, when it is determined that the evaluation result of the preset period is to raise the definition and there is a definition level higher than the currently played code rate in the definition levels of the at least one selectable code rate, the MEC determines that the adjusted code rate is the selectable code rate corresponding to the definition level higher than the currently played code rate, and sends a fourth message carrying the selectable code rate corresponding to the definition level higher than the currently played code rate to the UE.

It should be noted that, in practical applications, when the network condition is better, the MEC may instruct the UE to raise the bitrate, and this method may help the user to enjoy a video with higher definition, thereby improving user experience.

Alternatively, the first and second electrodes may be,

s1035-2, when it is determined that the evaluation result of the preset period is that the definition is reduced and a definition level lower than the currently played code rate exists in the definition levels of the at least one selectable code rate, the MEC determines that the adjusted code rate is the selectable code rate corresponding to the definition level lower than the currently played code rate, and sends a fourth message carrying the selectable code rate corresponding to the definition level lower than the currently played code rate to the UE.

It should be noted that, in practical applications, when a network condition is not good, the MEC may instruct the UE to decrease the bit rate, and although the definition of the designated video watched by the user decreases, the frequency of pause when the user watches the designated video is less, that is, the playing fluency of the designated video is improved; therefore, the user experience can be improved.

Alternatively, the first and second electrodes may be,

s1035-3, when it is determined that the evaluation result of the preset period is that the current definition is maintained, the MEC determines that the adjusted code rate is the current playing code rate reported in the last reporting period in the preset period, and sends a fourth message carrying the current playing code rate reported in the last reporting period in the preset period to the UE.

It should be noted that, in practical applications, when the network condition can support the play code rate of the specified video, if the MEC maintains the current definition according to the evaluation result of the predetermined period, the definition of the specified video of the UE is not changed, and frequent switching of the definition is avoided; therefore, the user experience can be improved; specifically, in practical applications, if the adjusted code rate is the same as the current playing code rate, code rate adjustment is not required, and at this time, the MEC needs to return an HTTP response 200OK to the UE, so that the UE determines that the sharpness does not need to be switched according to the received 200OK response.

The embodiment of the invention provides a code rate adjustment method, when a user watches a specified video by using a webpage or APP of UE, if the UE determines that video code rate adaptation needs to be started, an MEC instructs the UE to send an evaluation item list to the MEC according to a reporting period, so that the MEC can determine an adjusted code rate according to the evaluation item list reported by the UE and further instructs the UE to play the specified video according to the adjusted code rate; the problem of in the prior art when the user watches appointed video through webpage or APP, when the user has manually selected a definition, for example high definition, will follow user's selection always in the broadcast process, when the network situation can't satisfy user's selection, will appear blocking, influence the user and watch the experience is solved.

Example two

An embodiment of the present invention provides a method for adjusting a code rate, as shown in fig. 6 and 4, including:

s201, when the UE determines to establish connection with a server and receives at least one video data packet of a designated video requested by the UE and sent by the server, the UE sends a first message carrying at least one optional code rate for starting video code rate adaptation and the designated video to an MEC.

It should be noted that, in practical applications, when a user watches a specified video through a webpage or APP of a UE, the user needs to send a video request to a server corresponding to the video, and when the server receives the video request sent by the UE, the server responds to the video request of the UE and starts to send down a segmented data packet of the specified video; as shown in fig. 1, since the MEC is located between the UE and the server; therefore, the UE can query the playing duration of the video to be played according to the MEC, and determine whether to perform the code rate adjustment according to the playing duration.

Specifically, specifying at least one optional bitrate of the video refers to: all selectable code rates of the appointed video which is supported by the server and needs to be played by the user; such as: the user needs to play a certain video (either on-demand or live), and the optional bit rates of the certain video provided by the server include: 80kbps, 720kbps and 2000kbps, at this time, according to the code rate adjustment algorithm table shown in table 2, it can be known that the definition level corresponding to the optional code rate 80kbps provided by the server is level 1 (definition is 360P), the definition level corresponding to the optional code rate 720kbps is level 3 (definition is 720P), and the definition level corresponding to the optional code rate 2000kbps is level 5 (definition is 2K). The specified current playing code rate of the video refers to any one of the code rates set when the user quits the webpage or APP last time or the selectable code rates provided by the server and selected when the user uses the webpage or APP this time, for example, when the current playing code rate selected when the user quits the webpage or APP last time is 720kbps, the code rate adjustment method provided according to the embodiment of the present invention knows that the definition level of the 720kbps corresponding to the code rate adjustment algorithm table is level 3 (the definition is 720P); when the MEC is in the process of performing VRA during the playing process, if it is determined that the evaluation result of the preset period is to reduce the definition, it can be known from the above that the level 1 (definition is 360P) which is lower than the definition level currently played by the user among the selectable code rates provided by the server, and the selectable code rate provided by the server corresponding to the level 1 (definition is 360P) is 80 kbps; therefore, the MEC instructs the UE to play the specified video according to the adjusted code rate (80kbps), and simultaneously the current play code rate of the UE in the reported evaluation item list in the next preset period is 80 kbps; specifically, determining the adjusted code rate in each preset period is similar to the method described above, and is not described here again. When the UE determines that the playing time length is smaller than the time length threshold, the UE does not need to send a second data packet carrying the code rate adjustment to the MEC; specifically, when the playing duration is determined to be greater than or equal to the duration threshold, the UE initiates a short connection of a Transmission Control Protocol (TCP) to the MEC, and sends a Hypertext Transfer Protocol (HTTP) to the MEC, where the HTTP request carries at least one optional bit rate that needs to be adjusted for the bit rate and specifies the video.

S202, the UE receives a second message sent by the MEC responding to the first message; wherein the second message comprises at least one or more of: the second message is used for indicating the UE to send the evaluation item list to the MEC according to the reporting period; wherein the evaluation item list at least comprises one or more of the following parameters: and specifying the current playing code rate, the downloading rate, the RSRP value, the SINR value and the pause frequency of the video, wherein the pause frequency is equal to the ratio of pause time to preset time.

S203, the UE determines whether video code rate adaptation is needed according to the playing time length and the time length threshold of the specified video in the second message.

S204, when the playing time length is determined to be greater than or equal to the time length threshold value, the UE sends a third message to the MEC according to the reporting period in the second message; wherein the third message comprises: a measured value of at least one parameter in the list of items is evaluated.

S205, the UE receives a fourth message which is sent by the MEC and carries the adjusted code rate; and the MEC determines the adjusted code rate according to at least one optional code rate in the first message and the evaluation item list sent by the UE.

When the network condition is not good, the MEC can instruct the UE to reduce the code rate, although the definition of the appointed video watched by the user is reduced, the times of pause when the user watches the appointed video are fewer, namely the playing fluency of the appointed video is improved; therefore, the user experience can be improved.

When the network condition can support the playing code rate of the appointed video, the MEC does not change the definition of the appointed video of the UE according to the fact that the current definition is kept according to the evaluation result of the preset period, and frequent switching of the definition is avoided; therefore, the user experience can be improved.

Optionally, as shown in fig. 4, fig. 7 and fig. 8, the embodiment of the present invention provides a method for adjusting a code rate, further comprising:

s206, when receiving the fourth message sent by the MEC, if the video data packet of the designated video sent by the server is being downloaded, the UE sends a fifth message carrying the adjusted code rate to the server after receiving the video data packet; and the fifth message is used for indicating the server to send the next video data packet according to the adjusted code rate carried in the fifth message.

Alternatively, the first and second electrodes may be,

s207, when receiving the fourth message sent by the MEC, the UE sends a fifth message carrying the adjusted code rate to the server if the video data packet of the designated video sent by the server is being downloaded; and the fifth message is used for indicating the server to send the video data packet of the current specified video according to the adjusted code rate carried in the fifth message.

It should be noted that, as shown in fig. 4, when the UE receives the fourth message sent by the MEC, there are two cases, where the first UE is downloading the video data packet of the designated video sent by the server, and after the video data packet is received, the fifth message carrying the adjusted bitrate is sent to the server, and at this time, step S206 is executed; another UE is downloading a video data packet of a designated video sent by the server, and sending a fifth message carrying the adjusted code rate to the server, where step S207 is executed; and the UE performs code rate switching between the server and the received fourth data packet carrying the adjusted code rate, and when the switching is successful, the UE needs to judge whether the VRA process needs to be performed again, and restarts the reporting of the specified period.

Specifically, after receiving the code rate switching request message, the UE may carry a request cell different from the current definition video in the request message when requesting the next segment from the server after the current downloaded segment is downloaded, and the server provides the segment with the corresponding code rate according to the definition requirement requested by the UE; or the UE can immediately request the server in the current downloading and slicing downloading process, a request cell different from the current definition video is carried in the request message, and the server immediately switches the code rate according to the definition requirement requested by the UE; or when the UE does not report the evaluation item list according to the reporting period, the MEC terminates the VRA process.

The embodiment of the invention provides a code rate adjustment method, when a user watches a specified video by using a webpage or an APP of UE, if the UE determines that video code rate adaptation needs to be started, an MEC instructs the UE to send an evaluation item list to the MEC according to a reporting period, so that the MEC can determine an adjusted code rate according to the evaluation item list reported by the UE and further instructs the UE to play the specified video according to the adjusted code rate, and the problems that when the user watches the specified video through the webpage or the APP, the user manually selects a definition, such as high definition, in the prior art, the user always follows the selection of the user in the playing process, and when the network condition cannot meet the selection of the user, the user is stuck and the watching experience of the user is influenced are solved.

EXAMPLE III

An embodiment of the present invention provides a UE10, as shown in fig. 9, including:

the processing module 102 is configured to, when it is determined that a connection is established with the server and the receiving module 101 receives at least one video data packet of a specified video requested by the UE sent by the server, control the sending module 103 to send a first message to the MEC20, where the first message carries at least one optional bitrate for starting video bitrate adaptation and the specified video.

A receiving module 101, further configured to receive a second message sent by MEC20 in response to the first message; wherein the second message comprises at least one or more of: the second message is used for indicating the UE to send the evaluation item list to the MEC according to the reporting period; wherein the evaluation item list at least comprises one or more of the following parameters: and specifying the current playing code rate, the downloading rate, the RSRP value, the SINR value and the pause frequency of the video, wherein the pause frequency is equal to the ratio of pause time to preset time.

The processing module 102 is further configured to determine whether video rate adaptation needs to be performed according to the playing duration and the duration threshold of the specified video in the second message received by the receiving module 101.

The processing module 102 is further configured to, when it is determined that the playing duration is greater than or equal to the duration threshold, control the sending module 103 to send a third message to the MEC20 according to the reporting period in the second message received by the receiving module 101; wherein the third message comprises: a measured value of at least one parameter in the list of items is evaluated.

The receiving module 101 is further configured to receive a fourth message carrying the adjusted code rate and sent by the MEC 20; the fourth message is used for instructing the UE to play the specified video according to the adjusted bitrate in the fourth message, and the MEC20 determines the adjusted bitrate according to at least one optional bitrate in the first message and the evaluation item list sent by the UE.

Optionally, the processing module 102 is further configured to, when the receiving module 101 receives the fourth message sent by the MEC20, if the video data packet of the specified video sent by the server is being downloaded, control the sending module 103 to send a fifth message carrying the adjusted bitrate to the server after the video data packet is received; and the fifth message is used for indicating the server to send the next video data packet according to the adjusted code rate carried in the fifth message.

Alternatively, the first and second electrodes may be,

the processing module 102 is further configured to, when the receiving module 101 receives the fourth message sent by the MEC20, control the sending module 103 to send a fifth message carrying the adjusted code rate to the server if the video data packet of the specified video sent by the server is being downloaded; and the fifth message is used for indicating the server to send the video data packet of the current specified video according to the adjusted code rate carried in the fifth message.

The embodiment of the invention provides UE (user equipment), wherein when a user watches a specified video by using a webpage or APP (application) of the UE, if the UE determines that video code rate adaptation needs to be started, an MEC (media access control) instructs the UE to send an evaluation item list to the MEC according to a reporting period, so that the MEC can determine an adjusted code rate according to the evaluation item list reported by the UE and further instruct the UE to play the specified video according to the adjusted code rate; the problem of in the prior art when the user watches appointed video through webpage or APP, when the user has manually selected a definition, for example high definition, will follow user's selection always in the broadcast process, when the network situation can't satisfy user's selection, will appear blocking, influence the user and watch the experience is solved.

Example four

An embodiment of the present invention provides an MEC20, as shown in fig. 10, comprising:

a processing module 202, configured to control the sending module 203 to send a second message responding to the first message to the UE10 when the receiving module 201 receives the first message that carries at least one optional bitrate for starting video bitrate adaptation and specifying a video and is sent by the UE; wherein the second message comprises at least one or more of: the reporting period, the evaluation item list and the playing duration of the specified video, and the second message is used for indicating the UE to send the evaluation item list to the MEC20 according to the reporting period; wherein the evaluation item list at least comprises one or more of the following parameters: and specifying the current playing code rate, the downloading rate, the RSRP value, the SINR value and the pause frequency of the video, wherein the pause frequency is equal to the ratio of pause time to preset time.

The receiving module 201 is further configured to receive a third message sent by the UE10 according to the reporting period in the second message; wherein the third message comprises: a measured value of at least one parameter in the list of items is evaluated.

The processing module 202 is further configured to control the sending module 203 to send a fourth message carrying the adjusted code rate to the UE 10; the fourth message is used to instruct the UE10 to play the specified video according to the adjusted bitrate in the fourth message, where the adjusted bitrate is determined according to at least one optional bitrate in the first message received by the receiving module 201 and the evaluation item list in the third message received by the receiving module 201.

Optionally, the reporting period includes at least one acquisition point, and the parameters acquired by each acquisition point at least include one or more of the following: appointing the current playing code rate, the downloading rate, the RSRP value, the SINR value and the pause frequency of the video, wherein the pause frequency is equal to the ratio of pause time to preset time; the evaluation item list includes: at least one acquisition point acquires a measured value of a parameter.

The processing module 202 is specifically configured to determine, according to a code rate adjustment algorithm configuration table, at least one optional code rate of the designated video in the first message received by the receiving module 201, and a current playing code rate of the designated video in the third message received by the receiving module, a definition level corresponding to the at least one optional code rate of the designated video and a definition level corresponding to the current playing code rate of the designated video; wherein, the code rate adjustment algorithm configuration table comprises: and the corresponding relation between the definition grade and the code rate interval.

The obtaining module 201 is further configured to obtain a parameter of each of the at least one acquisition point.

The processing module 202 is further configured to determine an evaluation result of each acquisition point according to the parameter of each acquisition point acquired by the acquisition module 201; wherein, the evaluation result comprises: raise sharpness, lower sharpness, and maintain current sharpness.

The processing module 202 is further configured to determine an evaluation result of the reporting period according to the evaluation result of the at least one acquisition point in the reporting period.

The processing module 202 is further configured to determine an evaluation result of the preset period according to the evaluation result of at least one reporting period in the preset period.

The processing module 202 is further configured to determine the adjusted code rate according to the evaluation result of the preset period, the definition level corresponding to at least one optional code rate of the designated video, and the definition level corresponding to the current playing code rate of the designated video, and control the sending module 203 to send a fourth message carrying the adjusted code rate to the UE 10.

Optionally, the code rate adjustment algorithm configuration table further includes: definition level and RSRP threshold, SINR threshold, and base coefficient K₀Approximation coefficient K₁Distance coefficient K₂And a correspondence to a stuck frequency threshold; the processing module 202 is specifically configured to determine that an evaluation result of an acquisition point is to maintain current definition when it is determined that an acquisition point does not match each code rate interval in the code rate adjustment algorithm configuration table; the processing module 202 is specifically configured to determine that an evaluation result of an acquisition point is lifting definition when it is determined that the acquisition point satisfying the first condition exists; wherein the first condition comprises: the RSRP value is greater than or equal to an RSRP threshold value corresponding to the definition level corresponding to at least one optional code rate of the designated video and higher than the definition level corresponding to the current playing code rate of the designated video, the SINR value is greater than or equal to an SINR threshold value corresponding to the definition level corresponding to at least one optional code rate of the designated video and higher than the definition level corresponding to the current playing code rate of the designated video, and the pause frequency is less than or equal to the pause frequency threshold value corresponding to at least one optional code rate of the designated video and higher than the pause frequency threshold value corresponding to the definition level corresponding to the current playing code rate of the designated video and

wherein V represents the current download rate, b represents the current play code rate, and K₀A basic coefficient, K, corresponding to the definition level corresponding to the current playing code rate₁An approximation coefficient, K, corresponding to the definition level corresponding to the current playing code rate₀Greater than 0, K₁Greater than 0; the processing module 202 is specifically configured to determine that an evaluation result of an acquisition point is reduced in definition when it is determined that an acquisition point satisfying a second condition exists; wherein the second condition comprises: the RSRP value is smaller than an RSRP threshold value corresponding to a definition grade corresponding to a current playing code rate of the designated video in a definition grade corresponding to at least one optional code rate of the designated video, or the SINR value is smaller than an SINR threshold value corresponding to a definition grade corresponding to a current playing code rate of the designated video in a definition grade corresponding to at least one optional code rate of the designated video, or the stuck frequency is greater than a stuck frequency threshold value corresponding to a definition grade corresponding to a current playing code rate of the designated video in a definition grade corresponding to at least one optional code rate of the designated video and is lower than the stuck frequency threshold value corresponding to a definition grade corresponding to a current playing code rate of the designated video

Wherein, K₂A distance coefficient, K, corresponding to the definition level corresponding to the current playing code rate₂Greater than 0; the processing module 202 is specifically configured to, when it is determined that there is an acquisition point that does not satisfy the first condition and the second condition, determine that the evaluation result of the acquisition point is to maintain the current sharpness.

Optionally, the processing module 202 is specifically configured to determine that the evaluation result of the reporting period is lifting definition when it is determined that the evaluation result of at least one acquisition point in the reporting period meets a third condition; wherein the third condition includes: the number of the acquisition points of which the evaluation result is the lifting definition in the reporting period is greater than that of the acquisition points of which the evaluation result is the lowering definition in the reporting period, and the number of the acquisition points of which the evaluation result is the lifting definition in the reporting period is greater than that of the acquisition points of which the evaluation result is the keeping of the current definition in the reporting period; the processing module 202 is specifically configured to determine that the evaluation result of the reporting period is to reduce the definition when it is determined that the evaluation result of the at least one acquisition point in the reporting period meets the fourth condition; wherein the fourth condition comprises: the number of the acquisition points with the evaluation result of reducing the definition in the reporting period is greater than the number of the acquisition points with the evaluation result of lifting the definition in the reporting period, and the number of the acquisition points with the evaluation result of reducing the definition in the reporting period is greater than the number of the acquisition points with the evaluation result of maintaining the current definition in the reporting period; the processing module 202 is specifically configured to determine that the evaluation result of the reporting period is to maintain the current definition when it is determined that the evaluation result of the at least one acquisition point in the reporting period does not satisfy the third condition and the fourth condition.

Optionally, the processing module 202 is specifically configured to determine that the evaluation result of the preset period is the lifting definition when it is determined that the evaluation result of at least one reporting period in the preset period meets a fifth condition; wherein the fifth condition comprises: the number of reporting periods with the lifting definition as an evaluation result in a preset period is greater than the number of reporting periods with the lifting definition as an evaluation result in a preset period, and the evaluation result of the last reporting period is the lifting definition; the processing module 202 is specifically configured to determine that the evaluation result of the preset period is to reduce the definition when it is determined that the evaluation result of at least one reporting period in the preset period meets the sixth condition; wherein the sixth condition comprises: the number of reporting periods with the evaluation result of reducing the definition in the preset period is larger than the number of reporting periods with the evaluation result of lifting the definition in the preset period, and the evaluation result of the last reporting period is reducing the definition; the processing module 202 is specifically configured to determine that the evaluation result of the preset period is to maintain the current definition when it is determined that the evaluation result of at least one reporting period in the preset period does not satisfy the fifth condition and the sixth condition.

Optionally, the processing module 202 is specifically configured to determine that the adjusted code rate is the optional code rate corresponding to the definition level higher than the current playing code rate when it is determined that the evaluation result of the preset period is to raise the definition and there is a definition level higher than the current playing code rate in the definition levels of the at least one optional code rate, and control the sending module 203 to send a fourth message carrying the optional code rate corresponding to the definition level higher than the current playing code rate to the UE 10; or, the processing module 202 is specifically configured to determine that the adjusted code rate is the optional code rate corresponding to the definition level lower than the current playing code rate when it is determined that the evaluation result of the preset period is that the definition is reduced and there is a definition level lower than the current playing code rate in the definition levels of the at least one optional code rate, and control the sending module 203 to send a fourth message carrying the optional code rate corresponding to the definition level lower than the current playing code rate to the UE 10; or, the processing module 202 is specifically configured to, when it is determined that the evaluation result of the preset period is that the current definition is maintained, determine that the adjusted code rate is the current playing code rate reported in the last reporting period in the preset period, and control the sending module 203 to send a fourth message carrying the current playing code rate reported in the last reporting period in the preset period to the UE 10.

The embodiment of the invention provides an MEC, when a user watches a specified video by using a webpage or an APP of UE, if the UE determines that video code rate adaptation needs to be started, the MEC instructs the UE to send an evaluation item list to the MEC according to a reporting period, so that the MEC can determine an adjusted code rate according to the evaluation item list reported by the UE and further instruct the UE to play the specified video according to the adjusted code rate; the problem of in the prior art when the user watches appointed video through webpage or APP, when the user has manually selected a definition, for example high definition, will follow user's selection always in the broadcast process, when the network situation can't satisfy user's selection, will appear blocking, influence the user and watch the experience is solved.

EXAMPLE five

An embodiment of the present invention provides a network system, including: any UE, base station, any MEC, and server as provided by embodiment four. For specific UE, refer to the relevant description in the third apparatus embodiment, and for MEC, refer to the relevant description in the fourth apparatus embodiment, which is not described herein again.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A method for adjusting a code rate, comprising:

when receiving a first message which is sent by UE and carries at least one optional code rate for starting video code rate adaptation and appointing a video, the MEC sends a second message responding to the first message to the UE; the second message includes a reporting period, an evaluation item list and a playing duration of the specified video, and is used for instructing the UE to send the evaluation item list to the MEC according to the reporting period; the evaluation item list comprises the current playing code rate, the downloading rate, the RSRP value, the SINR value and the pause frequency of the specified video, wherein the pause frequency is equal to the ratio of pause time to preset time;

the MEC receives a third message sent by the UE according to the reporting period in the second message; wherein the third message comprises: evaluating the measured values of the parameters in the item list;

the MEC sends a fourth message carrying the adjusted code rate to the UE; the fourth message is used for instructing the UE to play the specified video according to the adjusted code rate in the fourth message, and the adjusted code rate is determined according to the at least one optional code rate in the first message and the evaluation item list in the third message;

the reporting period comprises at least one acquisition point, and parameters acquired by each acquisition point comprise the current playing code rate, the downloading rate, the RSRP value, the SINR value and the pause frequency of the specified video, wherein the pause frequency is equal to the ratio of pause time to preset time;

the evaluation item list includes: measured values of the parameter acquired by the at least one acquisition point;

the sending, by the MEC, a fourth message carrying the adjusted code rate to the UE, including:

the MEC determines a definition level corresponding to at least one optional code rate of the designated video and a definition level corresponding to the current playing code rate of the designated video according to a code rate adjustment algorithm configuration table, at least one optional code rate of the designated video in the first message and the current playing code rate of the designated video in the third message; wherein, the code rate adjustment algorithm configuration table comprises: the corresponding relation between the definition grade and the code rate interval;

the MEC obtains parameters of each acquisition point in the at least one acquisition point;

the MEC determines an evaluation result of each acquisition point according to the parameters of each acquisition point; wherein the evaluation result comprises: lifting the definition, reducing the definition and keeping the current definition;

the MEC determines an evaluation result of the reporting period according to an evaluation result of at least one acquisition point in the reporting period;

the MEC determines an evaluation result of a preset period according to an evaluation result of at least one reporting period in the preset period;

and the MEC determines the adjusted code rate according to the evaluation result of the preset period, the definition level corresponding to at least one optional code rate of the appointed video and the definition level corresponding to the current playing code rate of the appointed video, and sends a fourth message carrying the adjusted code rate to the UE.

2. The method of claim 1, wherein the code rate adjustment algorithm configuration table further comprises: definition level and RSRP threshold, SINR threshold, and base coefficient K₀Approximation coefficient K₁Distance coefficient K₂And a correspondence to a stuck frequency threshold;

the MEC determines an evaluation result of each acquisition point according to the parameters of each acquisition point, and the evaluation result comprises the following steps:

when the MEC determines that the acquisition points which are not matched with each code rate interval in the code rate adjustment algorithm configuration table exist, determining that the evaluation result of the acquisition points is to keep the current definition;

when the MEC determines that the collection point meeting the first condition exists, determining that the evaluation result of the collection point is lifting definition; wherein the first condition comprises:

the RSRP value is greater than or equal to an RSRP threshold corresponding to a definition level corresponding to at least one optional bitrate of the designated video and higher than an RSRP threshold corresponding to a definition level corresponding to a current playing bitrate of the designated video, the SINR value is greater than or equal to an SINR threshold corresponding to a definition level corresponding to at least one optional bitrate of the designated video and higher than a definition level corresponding to the current playing bitrate of the designated video, and the stuck frequency is less than or equal to a stuck frequency threshold corresponding to at least one optional bitrate of the designated video and higher than a stuck frequency threshold corresponding to a definition level corresponding to the current playing bitrate of the designated video and lower than or equal to a stuck frequency threshold corresponding to at least one optional bitrate of the designated video and higher than a stuck frequency threshold corresponding to

when the MEC determines that the acquisition points meeting the second condition exist, determining that the evaluation result of the acquisition points is the reduced definition; wherein the second condition comprises:

the RSRP value is less than an RSRP threshold corresponding to a definition level corresponding to at least one optional bit rate of the designated video and lower than a definition level corresponding to a current playing bit rate of the designated video, or the SINR value is less than an SINR threshold corresponding to a definition level corresponding to at least one optional bit rate of the designated video and lower than a definition level corresponding to the current playing bit rate of the designated video, or the stuck frequency is greater than a stuck frequency threshold corresponding to at least one optional bit rate of the designated video and lower than a stuck frequency threshold corresponding to a definition level corresponding to the current playing bit rate of the designated video and higher than the stuck frequency threshold

Wherein, K₂A distance coefficient, K, corresponding to the definition level corresponding to the current playing code rate₂Greater than 0;

the MEC determines that the evaluation result of the acquisition points is to maintain the current sharpness when determining that there are acquisition points that do not satisfy the first condition and the second condition.

3. The method according to claim 1, wherein the MEC determines the evaluation result of the reporting period according to the evaluation result of at least one acquisition point in the reporting period, and comprises:

when the MEC determines that the evaluation result of at least one acquisition point in the reporting period meets a third condition, determining that the evaluation result of the reporting period is lifting definition; wherein the third condition comprises: the number of acquisition points of which the evaluation result is lifting definition in the reporting period is greater than the number of acquisition points of which the evaluation result is reducing definition in the reporting period, and the number of acquisition points of which the evaluation result is lifting definition in the reporting period is greater than the number of acquisition points of which the evaluation result is maintaining the current definition in the reporting period;

when the MEC determines that the evaluation result of at least one acquisition point in the reporting period meets a fourth condition, determining that the evaluation result of the reporting period is the resolution reduction; wherein the fourth condition includes: the number of the acquisition points with the evaluation result of reducing the definition in the reporting period is greater than the number of the acquisition points with the evaluation result of lifting the definition in the reporting period, and the number of the acquisition points with the evaluation result of reducing the definition in the reporting period is greater than the number of the acquisition points with the evaluation result of maintaining the current definition in the reporting period;

and when the MEC determines that the evaluation result of at least one acquisition point in the reporting period does not meet the third condition and the fourth condition, determining that the evaluation result of the reporting period keeps the current definition.

4. The method of claim 1, wherein the determining, by the MEC, the evaluation result of the preset period according to the evaluation result of at least one reporting period in the preset period comprises:

when the MEC determines that the evaluation result of at least one reporting period in the preset period meets a fifth condition, determining that the evaluation result of the preset period is the lifting definition; wherein the fifth condition comprises: the number of reporting periods with the evaluation result of lifting definition in the preset period is greater than the number of reporting periods with the evaluation result of reducing definition in the preset period, and the evaluation result of the last reporting period is lifting definition;

when the MEC determines that the evaluation result of at least one reporting period in the preset period meets a sixth condition, determining that the evaluation result of the preset period is the resolution reduction; wherein the sixth condition comprises: the number of reporting periods with the evaluation result of reducing definition in the preset period is greater than the number of reporting periods with the evaluation result of lifting definition in the preset period, and the evaluation result of the last reporting period is reducing definition;

and when the MEC determines that the evaluation result of at least one reporting period in the preset period does not meet the fifth condition and the sixth condition, determining that the evaluation result of the preset period keeps the current definition.

5. The method according to claim 1, wherein the MEC determines the adjusted bitrate according to the evaluation result of the preset period, the definition level corresponding to the at least one selectable bitrate of the designated video, and the definition level corresponding to the current playing bitrate of the designated video, and sends a fourth message carrying the adjusted bitrate to the UE, including:

when the MEC determines that the evaluation result of the preset period is raised definition and a definition grade higher than the current playing code rate exists in the definition grades of the at least one optional code rate, the MEC determines that the adjusted code rate is the optional code rate corresponding to the definition grade higher than the current playing code rate and sends a fourth message carrying the optional code rate corresponding to the definition grade higher than the current playing code rate to the UE;

alternatively, the first and second electrodes may be,

when the MEC determines that the evaluation result of the preset period is that the definition is reduced and a definition grade lower than the current playing code rate exists in the definition grades of the at least one optional code rate, the MEC determines that the adjusted code rate is the optional code rate corresponding to the definition grade lower than the current playing code rate and sends a fourth message carrying the optional code rate corresponding to the definition grade lower than the current playing code rate to the UE;

alternatively, the first and second electrodes may be,

and when the MEC determines that the evaluation result of the preset period is that the current definition is kept, determining that the adjusted code rate is the current playing code rate reported by the last reporting period in the preset period, and sending a fourth message carrying the current playing code rate reported by the last reporting period in the preset period to the UE.

6. A method for adjusting a code rate, comprising:

when the UE determines to establish connection with a server and receives at least one video data packet of a designated video requested by the UE and sent by the server, sending a first message carrying at least one optional code rate for starting video code rate adaptation and the designated video to an MEC;

the UE receives a second message sent by the MEC in response to the first message; the second message includes a reporting period, an evaluation item list and a playing duration of the specified video, and is used for instructing the UE to send the evaluation item list to the MEC according to the reporting period; the evaluation item list comprises the current playing code rate, the downloading rate, the RSRP value, the SINR value and the pause frequency of the specified video, wherein the pause frequency is equal to the ratio of pause time to preset time;

the UE determines whether video code rate adaptation is needed or not according to the playing duration and the duration threshold of the specified video in the second message;

when the UE determines that the playing time length is greater than or equal to the time length threshold value, the UE sends a third message to the MEC according to the reporting period in the second message; wherein the third message comprises: evaluating the measured values of the parameters in the item list;

the UE receives a fourth message which is sent by the MEC and carries the adjusted code rate; the fourth message is used to instruct the UE to play the specified video according to the adjusted bitrate in the fourth message, and the MEC determines the adjusted bitrate according to the at least one optional bitrate in the first message and the evaluation item list sent by the UE;

7. The method of claim 6, further comprising:

when receiving the fourth message sent by the MEC, if the video data packet of the specified video sent by the server is being downloaded, the UE sends a fifth message carrying the adjusted code rate to the server after receiving the video data packet; the fifth message is used for instructing the server to send the next video data packet according to the adjusted code rate carried in the fifth message;

alternatively, the first and second electrodes may be,

when receiving a fourth message issued by the MEC, the UE sends a fifth message carrying the adjusted code rate to the server if downloading the video data packet of the designated video sent by the server; and the fifth message is used for indicating the server to send the video data packet of the current specified video according to the adjusted code rate carried in the fifth message.

8. An MEC, comprising:

the processing module is used for controlling the sending module to send a second message responding to the first message to the UE when the receiving module receives the first message which is sent by the UE and carries at least one optional code rate for starting video code rate adaptation and appointing a video; the second message includes a reporting period, an evaluation item list and a playing duration of the specified video, and is used for instructing the UE to send the evaluation item list to the MEC according to the reporting period; the evaluation item list comprises the current playing code rate, the downloading rate, the RSRP value, the SINR value and the pause frequency of the specified video, wherein the pause frequency is equal to the ratio of pause time to preset time;

the receiving module is further configured to receive a third message sent by the UE according to the reporting period in the second message; wherein the third message comprises: evaluating the measured values of the parameters in the item list;

the processing module is further configured to control the sending module to send a fourth message carrying the adjusted code rate to the UE; wherein the fourth message is used to instruct the UE to play the specified video according to the adjusted bitrate in the fourth message, and the adjusted bitrate is determined according to the at least one optional bitrate in the first message received by the receiving module and the evaluation item list in the third message received by the receiving module;

the processing module is specifically configured to determine, according to a code rate adjustment algorithm configuration table, at least one optional code rate of the designated video in the first message received by the receiving module, and a currently played code rate of the designated video in the third message received by the receiving module, a definition level corresponding to the at least one optional code rate of the designated video and a definition level corresponding to the currently played code rate of the designated video; wherein, the code rate adjustment algorithm configuration table comprises: the corresponding relation between the definition grade and the code rate interval;

the acquisition module is further used for acquiring parameters of each acquisition point in the at least one acquisition point;

the processing module is further used for determining an evaluation result of each acquisition point according to the parameter of each acquisition point acquired by the acquisition module; wherein the evaluation result comprises: lifting the definition, reducing the definition and keeping the current definition;

the processing module is further configured to determine an evaluation result of the reporting period according to an evaluation result of at least one acquisition point in the reporting period;

the processing module is further configured to determine an evaluation result of the preset period according to an evaluation result of at least one reporting period within the preset period;

the processing module is further configured to determine an adjusted code rate according to the evaluation result of the preset period, the definition level corresponding to the at least one optional code rate of the designated video, and the definition level corresponding to the currently played code rate of the designated video, and control the sending module to send a fourth message carrying the adjusted code rate to the UE.

9. The MEC of claim 8, wherein the rate adjustment algorithm configuration table further comprises: definition level and RSRP threshold, SINR threshold, and base coefficient K₀Approximation coefficient K₁Distance coefficient K₂And a correspondence to a stuck frequency threshold;

the processing module is specifically configured to determine that an evaluation result of the acquisition point is to maintain current definition when it is determined that an acquisition point that does not match each code rate interval in the code rate adjustment algorithm configuration table exists;

the processing module is specifically used for determining that the evaluation result of the acquisition point is lifting definition when the acquisition point meeting the first condition is determined to exist; wherein the first condition comprises:

the RSRP value is greater than or equal to the current definition level higher than the designated video in the definition level corresponding to at least one optional code rate of the designated videoThe SINR value is greater than or equal to an RSRP threshold corresponding to a definition level corresponding to at least one optional code rate of the designated video, the SINR value is higher than an SINR threshold corresponding to a definition level corresponding to the current playing code rate of the designated video, and the stuck frequency is less than or equal to a stuck frequency threshold corresponding to a definition level corresponding to at least one optional code rate of the designated video, the stuck frequency threshold corresponding to a definition level corresponding to the current playing code rate of the designated video, the stuck frequency threshold is higher than the stuck frequency threshold corresponding to a definition level corresponding to the current playing code rate of the designated video, and the stuck frequency threshold is

the processing module is specifically used for determining that the evaluation result of the acquisition point is reduced definition when the acquisition point meeting a second condition is determined to exist; wherein the second condition comprises:

the processing module is specifically configured to determine that the evaluation result of the acquisition point is to maintain the current definition when it is determined that there is an acquisition point that does not satisfy the first condition and the second condition.

10. The MEC according to claim 8, wherein the processing module is specifically configured to determine that the evaluation result of the reporting period is lifting resolution when it is determined that the evaluation result of at least one acquisition point in the reporting period satisfies a third condition; wherein the third condition comprises: the number of acquisition points of which the evaluation result is lifting definition in the reporting period is greater than the number of acquisition points of which the evaluation result is reducing definition in the reporting period, and the number of acquisition points of which the evaluation result is lifting definition in the reporting period is greater than the number of acquisition points of which the evaluation result is maintaining the current definition in the reporting period;

the processing module is specifically configured to determine that the evaluation result of the reporting period is reduced in definition when it is determined that the evaluation result of at least one acquisition point in the reporting period satisfies a fourth condition; wherein the fourth condition includes: the number of the acquisition points with the evaluation result of reducing the definition in the reporting period is greater than the number of the acquisition points with the evaluation result of lifting the definition in the reporting period, and the number of the acquisition points with the evaluation result of reducing the definition in the reporting period is greater than the number of the acquisition points with the evaluation result of maintaining the current definition in the reporting period;

the processing module is specifically configured to determine that the evaluation result of the reporting period is to maintain the current definition when it is determined that the evaluation result of the at least one acquisition point in the reporting period does not satisfy the third condition and the fourth condition.

11. The MEC according to claim 8, wherein the processing module is specifically configured to determine that the evaluation result of the preset period is lifting resolution when it is determined that the evaluation result of at least one reporting period in the preset period satisfies a fifth condition; wherein the fifth condition comprises: the number of reporting periods with the evaluation result of lifting definition in the preset period is greater than the number of reporting periods with the evaluation result of reducing definition in the preset period, and the evaluation result of the last reporting period is lifting definition;

the processing module is specifically configured to determine that the evaluation result of the preset period is to reduce the definition when it is determined that the evaluation result of at least one reporting period in the preset period meets a sixth condition; wherein the sixth condition comprises: the number of reporting periods with the evaluation result of reducing definition in the preset period is greater than the number of reporting periods with the evaluation result of lifting definition in the preset period, and the evaluation result of the last reporting period is reducing definition;

the processing module is specifically configured to determine that the evaluation result of the preset period is to maintain the current definition when it is determined that the evaluation result of at least one reporting period in the preset period does not satisfy the fifth condition and the sixth condition.

12. The MEC of claim 8, wherein the processing module is specifically configured to, when it is determined that the evaluation result of the preset period is raised definition and a definition level higher than the currently played code rate exists in the definition levels of the at least one selectable code rate, determine that the adjusted code rate is the selectable code rate corresponding to the definition level higher than the currently played code rate, and control the sending module to send a fourth message carrying the selectable code rate corresponding to the definition level higher than the currently played code rate to the UE;

alternatively, the first and second electrodes may be,

the processing module is specifically configured to determine that the adjusted code rate is the selectable code rate corresponding to the definition level lower than the current playing code rate when it is determined that the evaluation result of the preset period is that the definition is reduced and the definition level lower than the current playing code rate exists in the definition levels of the at least one selectable code rate, and control the sending module to send a fourth message carrying the selectable code rate corresponding to the definition level lower than the current playing code rate to the UE;

alternatively, the first and second electrodes may be,

the processing module is specifically configured to, when it is determined that the evaluation result of the preset period is that the current definition is maintained, determine that the adjusted code rate is the current playing code rate reported in the last reporting period in the preset period, and control the sending module to send a fourth message carrying the current playing code rate reported in the last reporting period in the preset period to the UE.

13. A UE, comprising:

the processing module is used for controlling the sending module to send a first message carrying at least one optional code rate for starting video code rate adaptation and the appointed video to the MEC when the connection with the server is determined and the receiving module receives at least one video data packet of the appointed video requested by the UE and sent by the server;

the receiving module is further configured to receive a second message sent by the MEC in response to the first message; the second message includes a reporting period, an evaluation item list and a playing duration of the specified video, and is used for instructing the UE to send the evaluation item list to the MEC according to the reporting period; the evaluation item list comprises the current playing code rate, the downloading rate, the RSRP value, the SINR value and the pause frequency of the specified video, wherein the pause frequency is equal to the ratio of pause time to preset time;

the processing module is further configured to determine whether video code rate adaptation needs to be performed according to the playing time length and the time length threshold of the specified video in the second message received by the receiving module;

the processing module is further configured to control the sending module to send a third message to the MEC according to a reporting period in the second message received by the receiving module when it is determined that the playing duration is greater than or equal to the duration threshold; wherein the third message comprises: evaluating the measured values of the parameters in the item list;

the receiving module is further configured to receive a fourth message carrying the adjusted code rate and sent by the MEC; the fourth message is used to instruct the UE to play the specified video according to the adjusted bitrate in the fourth message, and the MEC determines the adjusted bitrate according to the at least one optional bitrate in the first message and the evaluation item list sent by the UE;

14. The UE of claim 13, wherein the processing module is further configured to, when the receiving module receives a fourth message sent by the MEC, if a video data packet of the specified video sent by the server is being downloaded, control the sending module to send a fifth message carrying the adjusted bitrate to the server after the video data packet is received; the fifth message is used for instructing the server to send the next video data packet according to the adjusted code rate carried in the fifth message;

alternatively, the first and second electrodes may be,

the processing module is further configured to, when the receiving module receives a fourth message sent by the MEC, control the sending module to send a fifth message carrying the adjusted bitrate to the server if the video data packet of the specified video sent by the server is being downloaded; and the fifth message is used for indicating the server to send the video data packet of the current specified video according to the adjusted code rate carried in the fifth message.

15. A network system, comprising: the MEC of any one of claims 8-12 and a server, a base station, a UE of any one of claims 13 or 14.