WO2018010119A1

WO2018010119A1 - Video service resource allocation method and device

Info

Publication number: WO2018010119A1
Application number: PCT/CN2016/089899
Authority: WO
Inventors: 石娴文; 巢志骏; 楼群芳; 张劲林; 瓦伦汀S; 提斯里曼妥思D; 戈麦斯A·N; 杨建强
Original assignee: 华为技术有限公司
Priority date: 2016-07-13
Filing date: 2016-07-13
Publication date: 2018-01-18

Abstract

Disclosed in embodiments of the present invention are a video service resource allocation method and device. The method comprises: acquiring, by a base station, a current buffer state of a video service of a terminal; determining, according to a predetermined mapping policy, a scheduling priority level corresponding to the current buffer state of the video service, the mapping policy comprising a mapping relationship between buffer states and scheduling priority levels or a mapping relationship between buffer states and algorithms for calculating a scheduling priority level; and allocating, according to the scheduling priority level, a radio resource to the video service. The present invention ensures playback quality and smoothness of a video, thus improving user experience.

Description

Video service resource allocation method and device

Technical field

The present invention relates to the field of wireless communication technologies, and in particular, to a video service resource allocation method and apparatus.

Background technique

With the continuous development of wireless mobile communication systems, the business volume of mobile video services has grown rapidly. Mobile video service refers to communication services that provide video content to users through mobile networks and mobile terminals, such as video messages, video mail, real-time/on-demand video content, video games, mobile video telephony/conference, mobile video shopping, and mobile video surveillance. And other types of business, etc., to facilitate users to experience video services anytime, anywhere.

In view of the large data volume characteristics of the video service, in order to smooth the delay caused by the mobile network transmission and realize the synchronous playback of the transceiver end, the user terminal needs to temporarily store the received audio and video in the cache to ensure the audio and video. Data can continue to play continuously after being transmitted over the mobile network. However, in the wireless communication environment, the increase in the number of video users, the unreasonable allocation of radio resources, and the channel of the mobile communication network may cause congestion of the network and decrease the air interface rate, resulting in insufficient buffering of the video service of the user, which ultimately leads to Video users are prone to stagnation, affecting the experience of video users.

Summary of the invention

The technical problem to be solved by the embodiments of the present invention is to provide a video service resource allocation method and device, which solves the problem of poor user experience of video services in the existing wireless communication system.

In a first aspect, an embodiment of the present invention provides a video service resource allocation method, which may include:

The base station acquires a current buffer status of the video service of the terminal;

Determining, according to a preset mapping policy, a scheduling priority corresponding to a current cache state of the video service, where the mapping policy includes a mapping relationship between a cache state and a scheduling priority or a relationship between a cache state and a scheduling priority algorithm Mapping relations;

Performing radio resource allocation for the video service according to the scheduling priority. The higher the scheduling priority, the more radio resources are allocated.

By implementing the embodiment of the present invention, the radio resource is adjusted according to the buffering state of the video, so that the video service of the terminal can be played more smoothly under the condition that the radio resource is limited, and the video playback quality and smoothness are ensured. Sexuality, enhance the user experience.

With reference to the first aspect, in a first possible implementation, the acquiring, by the base station, a current cache state of a video service of the terminal includes:

If the video service does not start playing, the current cache state is an initial cache state;

Determining, according to a preset mapping policy, a scheduling priority corresponding to a current cache state of the video service, including:

And determining, according to the mapping relationship between the cache state and the scheduling priority, that the current scheduling priority of the video service is the first scheduling priority.

By implementing the embodiment of the present invention, the video service play is divided into an initial cache state and resource allocation adjustment is performed on the video in the state, which can improve the user experience during initial viewing.

With reference to the first possible implementation manner of the first aspect, in a second possible implementation, the acquiring, by the base station, a current cache state of a video service of the terminal includes:

If the video service starts playing, the current playable duration in the buffer is less than the preset time threshold, and the current playable duration is greater than the preset rate threshold, and the current cache state is the cache fill state;

Determining, according to the mapping relationship between the cache state and the scheduling priority, that the current scheduling priority of the video service is the second scheduling priority, where the current scheduling state is the second scheduling priority, the first scheduling The priority is higher than the second scheduling priority.

By implementing the embodiment of the present invention, the video service play is divided into a cache fill state and resource allocation adjustment is performed on the video in the state, which can improve the video viewing experience of the user in the case that a card may occur.

Combining the first aspect, or combining the first possible implementation of the first aspect, or A second possible implementation manner of the first aspect, in a third possible implementation manner, the acquiring, by the base station, a current cache state of a video service of the terminal includes:

After the video service starts playing, the current playable duration in the buffer is greater than or equal to the preset time threshold, and the current playable duration growth rate is less than or equal to the preset rate threshold, and the current cache state is cache stable. status;

If the current cache state is a cache stable state, the preset calculation formula of the scheduling priority corresponding to the video service is searched according to the mapping relationship between the cache state and the scheduling priority algorithm;

And calculating, according to the preset calculation formula, a scheduling priority corresponding to a cache stable state of the video service to a third scheduling priority.

By implementing the embodiment of the present invention, the video service play is divided into a cache stable state and resource allocation adjustment is performed on the video in the state, so that the video can be maintained in the current play stable state, and the overall viewing experience of the user is improved.

With reference to the third possible implementation manner of the foregoing aspect, in a fourth possible implementation manner, the preset calculation formula is:

P=f(K)

P is the scheduling priority, K is the ratio of the estimated video stream rate to the target video stream rate, and the K is greater than or equal to 0. For any two K values K1 and K2, when K1 is less than K2, K1 corresponds to the priority. Level P is higher than or equal to the priority P corresponding to K2;

The estimated video flow rate is an average video stream rate in a preset period in which the video service enters the buffer stable state, and the target video stream rate is the video service entry point. The video stream rate at the time of the cache steady state or the average video stream rate or the preset video stream rate in the preset time period after entering the buffer stable state.

With reference to the third possible implementation manner of the first aspect, in a fifth possible implementation manner, the preset calculation formula is:

σ is a judgment factor of the scheduling priority of the video service, and P is a scheduling priority of the video service in a cache stable state, where P3 is greater than P2 and smaller than P1, where A is a pre-set and judgment factor σ A first threshold for comparison, B is a second threshold value for comparison with the determination factor σ, the first threshold A is greater than the second threshold B, A is a number less than 0, and B is a number greater than 0, A The units of B and B are both seconds; in the preset calculation formula, the specific calculation method of the judgment factor σ is:

Where B(t) is the playable duration of the video service in the buffer area at time t, and B(0) is the value of B(t) when t is 0, for the video service to enter the location The playable duration in the buffer area at the initial moment of the cache stable state; SchData(t _i ) is the video stream rate obtained by the video service at time t _i ,

For the total amount of video streams accumulated in the τ time period from the current time t to the previous time (t-τ), S' ₃ (t-τ) is the target video stream rate at the time of (t-τ),

It refers to the total number of transmission time intervals TTI of the radio buffer control RLC layer in the τ time period from the current time t to the previous time (t-τ), wherein the value of t _i is t -τ to the time value corresponding to each TTI in time t, τ is the calculation update period of the determination factor σ, and the units of t, τ, and t _i are all seconds.

With reference to the third possible implementation manner of the first aspect, in a sixth possible implementation manner, the preset calculation formula is:

P=f(L)

P is the scheduling priority, L is the ratio of the current slice playable duration to the historical average slice download duration, and the L is greater than or equal to 0. For any two L values L1 and L2, when L1 is less than L2, L1 The corresponding priority P is higher than or equal to the priority P corresponding to L2;

The historical average slice download duration is an average duration of all the slice downloads after the video service enters the cache stable state and before the current slice download.

With reference to the third possible implementation manner of the first aspect, in a seventh possible implementation manner, the preset calculation formula is:

P(n) is the scheduling priority of the nth fragment download currently located after the video service enters the cache stable state, P3 is greater than P2 and less than P1, and MSD is fragmentable playable duration, SFT(n-1) The (n-1) slice download duration after the video service enters the cache stable state, and the AvgSFT(n-1) is the front of the video service after entering the cache stable state (n-1) The average duration of the downloads of the fragments, where C is the pre-set for the ratio

The third threshold for comparison, D is the pre-set for the ratio

A fourth threshold for comparison is performed, the third threshold C is less than the fourth threshold D, and C and D are both positive numbers.

With reference to the seventh possible implementation manner of the first aspect, in the eighth possible implementation manner, the specific manner of calculating the AvgSFT(n-1) is:

AvgSFT(n-1)=(1-α)·AvgSFT(n-2)+α·SFT(n-1), where α is a filter coefficient, and α is in a range of more than 0 and less than 1.

With reference to the third possible implementation manner of the first aspect, in a ninth possible implementation manner, the preset calculation formula is:

P=f(M)

P is the scheduling priority, and M is the ratio of the slack playable duration to the current slicing download duration. The M is greater than or equal to 0. For any two M values M1 and M2, when M1 is less than M2, M1 corresponds to The priority P is higher than or equal to the priority P corresponding to M2;

The current fragment download duration is when the video service enters the cache stable state. The shard that was in the previous download downloads the currently used download duration.

With reference to the third possible implementation manner of the foregoing aspect, in a tenth possible implementation manner, the preset calculation formula is:

The P(t ⁿ ) is the scheduling priority of the video service at the current time t, the MSD is the fragmentable playable duration, and the current time t is the nth after the video service enters the cache stable state. Within the time range of the slice download, HOL(t ⁿ ) is the download time of the currently used slice for the nth slice where the current time t is located.

In a second aspect, an embodiment of the present invention provides a base station, which may include: a memory and a processor;

The memory is used to store program code, and the processor is configured to invoke the program code stored in the memory to perform the following steps:

Obtaining the current cache status of the video service of the terminal;

With reference to the second aspect, in a first possible implementation manner, the processor is configured to obtain a current cache state of a video service of the terminal, specifically:

The processor is configured to determine, according to a preset mapping policy, a scheduling priority corresponding to a current cache state of the video service, specifically:

With reference to the first possible implementation manner of the second aspect, in a second possible implementation manner, the processor is configured to obtain a current cache state of a video service of the terminal, specifically:

With reference to the second aspect, or in combination with the first possible implementation of the second aspect, or in combination with the second possible implementation of the second aspect, in a third possible implementation, the processor is configured to obtain The current cache status of the video service of the terminal, specifically:

With reference to the third possible implementation manner of the second aspect, in a fourth possible implementation manner, the preset calculation formula is:

P=f(K)

The estimated video flow rate is when the video service enters the cache stable state. And an average video stream rate in a preset period in which the video is in a predetermined period of time after the video service enters the buffer stable state or enters the cache stable state. The average video stream rate or the preset video stream rate.

With reference to the third possible implementation manner of the second aspect, in a fifth possible implementation manner, the preset calculation formula is:

With reference to the third possible implementation manner of the second aspect, in a sixth possible implementation manner, the preset calculation formula is:

P=f(L)

With reference to the third possible implementation manner of the second aspect, in a seventh possible implementation manner, the preset calculation formula is:

The third threshold for comparison, D is the pre-set for the ratio

With reference to the seventh possible implementation manner of the second aspect, in the eighth possible implementation manner, the specific manner of calculating the AvgSFT(n-1) is:

AvgSFT(n-1)=(1-α)·AvgSFT(n-2)+α·SFT(n-1), where α is a filter coefficient, α The value ranges from greater than 0 to less than 1.

With reference to the third possible implementation manner of the second aspect, in a ninth possible implementation manner, the preset calculation formula is:

P=f(M)

The download duration of the current fragment is the download duration currently used by the current fragment download after the video service enters the cache stable state.

With reference to the third possible implementation manner of the second aspect, in a tenth possible implementation manner, the preset calculation formula is:

In a third aspect, an embodiment of the present invention provides a video service resource allocation apparatus, which may include:

An obtaining module, configured to acquire a current cache state of a video service of the terminal;

a determining module, configured to determine, according to a preset mapping policy, a scheduling priority corresponding to a current cache state of the video service, where the mapping policy includes a mapping relationship between a cache state and a scheduling priority, or a cache state and a scheduling priority Mapping relationship between level algorithms;

And an allocating module, configured to perform radio resource allocation for the video service according to the scheduling priority, where the higher the scheduling priority, the more allocated radio resources.

In combination with the third aspect, in the first possible implementation, the obtaining module is specifically configured to:

The determination module is specifically used to:

In conjunction with the first possible implementation of the third aspect, in a second possible implementation, the obtaining module is specifically configured to:

The determination module is specifically used to:

With reference to the third aspect, or in combination with the first possible implementation of the third aspect, or in combination with the second possible implementation of the third aspect, in a third possible implementation, the obtaining module is specifically configured to:

The determining module includes:

a searching unit, configured to: if the current cache state is a cache stable state, search for a preset calculation formula of a scheduling priority corresponding to the video service according to a mapping relationship between the cache state and a scheduling priority algorithm;

The calculating unit is configured to calculate, according to the preset calculation formula, a scheduling priority corresponding to a cache stable state of the video service to a third scheduling priority.

With reference to the third possible implementation manner of the third aspect, in a fourth possible implementation manner, the preset calculation formula is:

P=f(K)

P is the scheduling priority, and K is the ratio of the estimated video stream rate to the target video stream rate, the K Greater than or equal to 0, for any two K values K1 and K2, when K1 is less than K2, the priority P corresponding to K1 is higher than or equal to the priority P corresponding to K2;

With reference to the third possible implementation manner of the third aspect, in a fifth possible implementation manner, the preset calculation formula is:

It refers to the total number of transmission time intervals TTI of the radio buffer control RLC layer of the radio link control RLC from the current time t to the previous time (t-τ), where the value of t _i is t -τ to the time value corresponding to each TTI in time t, τ is the calculation update period of the determination factor σ, and the units of t, τ, and t _i are all seconds.

With reference to the third possible implementation manner of the third aspect, in a sixth possible implementation manner, the preset calculation formula is:

P=f(L)

With reference to the third possible implementation manner of the third aspect, in a seventh possible implementation manner, the preset calculation formula is:

The third threshold for comparison, D is the pre-set for the ratio

With reference to the seventh possible implementation manner of the third aspect, in the eighth possible implementation manner, the specific manner of calculating the AvgSFT(n-1) is:

With reference to the third possible implementation manner of the third aspect, in a ninth possible implementation manner, the preset calculation formula is:

P=f(M)

With reference to the third possible implementation manner of the third aspect, in a tenth possible implementation manner, the preset calculation formula is:

In the embodiment of the present invention, the current cache state of the video service of the terminal is obtained by the base station, and the scheduling priority corresponding to the current cache state of the video service is determined according to the preset mapping policy, and finally, according to the scheduling priority, The video service performs radio resource allocation. That is, by using the direct acquisition or the budget estimation of the current cache state of the video service of the terminal by the base station to determine the current cache state of the video service, and then determining the delay according to the determined cache state and the preset mapping policy. The scheduling priority corresponding to the storage state, and finally, the radio resource is adjusted according to the determined scheduling priority, so that the video service of the terminal can be played more smoothly under the condition that the radio resource is limited, and the video is played. Quality and fluency to enhance the user experience.

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 embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.

1 is a schematic diagram of a network architecture of video service resource allocation according to an embodiment of the present invention;

2 is a schematic flowchart of a video service resource allocation method according to an embodiment of the present invention;

3 is a schematic structural diagram of a base station according to an embodiment of the present invention;

4 is a schematic structural diagram of a video service resource allocation apparatus according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of another video service resource allocation apparatus according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The terms "first", "second", "third", and "fourth" and the like in the specification and claims of the present invention are used to distinguish different objects, and are not intended to describe a specific order. . Furthermore, the terms "comprises" and "comprising" and "comprising" are intended to cover a non-exclusive inclusion. For example, a process, method, system, product, or device that comprises a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units not listed, or alternatively Other steps or units inherent to these processes, methods, products or equipment.

References to "an embodiment" herein mean that a particular feature, structure, or characteristic described in connection with the embodiments can be included in at least one embodiment of the invention. The appearances of the phrases in various places in the specification are not necessarily referring to the same embodiments, and are not exclusive or alternative implementations that are mutually exclusive. example. Those skilled in the art will understand and implicitly understand that the embodiments described herein can be combined with other embodiments.

It should be understood that the technical solutions of the embodiments of the present invention can be applied to various communication systems, such as a Global System of Mobile communication (GSM) system, a Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (Frequency Division Duplex, FDD) system, LTE Time Division Duplex (TDD), Universal Mobile Telecommunication System (UMTS), and the like.

It should also be understood that, in the embodiment of the present invention, the base station may be a base station (Base Transceiver Station, BTS) in GSM or CDMA, or may be a base station (NodeB) in WCDMA, or may be an evolved base station in LTE ( The present invention is not limited to the evolution of the Node B, the eNB or the eNodeB, or the base station equipment in the future 5G network.

It should also be understood that, in the embodiment of the present invention, the terminal may also be referred to as an access terminal, a terminal device, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, and a user. Equipment, wireless communication equipment, user agents or user devices. The terminal can be a cellular phone, a cordless phone, a smart phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a smart bracelet, and a smart wearer that support wireless mobile communication video services. Equipment, MP3 player (Moving Picture Experts Group Audio Layer III, Motion Picture Experts Group Audio Layer 3), MP4 (Moving Picture Experts Group Audio Layer IV), player, personal digital processing ( Personal Digital Assistant (PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, and a terminal device in a future 5G network.

In order to facilitate the understanding of the embodiments of the present invention, the network architecture of the wireless communication system on which the embodiments of the present invention are based is first described. Please refer to FIG. 1. FIG. 1 is a schematic diagram of a network structure of a wireless communication system. As shown in FIG. 1 , a terminal initiates a video service request to a base station through a wireless communication link, and the terminal communicates with the base station through wireless, and the base station passes optical fiber and mobility management. Entity (Mobility Management Entity, MME) is connected to obtain related video service resources from a server or core network that provides video service support. The video service in the present invention is applicable to an international standard group of MPEG-based adaptive frequency coding over the standard (Dynamic Adaptive Streaming over HTTP, DASH) and a dynamic rate adaptation (HLS) transmission mechanism.

It is to be understood that the foregoing network architecture is only one of the preferred embodiments of the present invention. The network architecture in the embodiment of the present invention includes, but is not limited to, the foregoing network architecture, as long as the network of the video service in the wireless communication system can be implemented. The architecture is within the scope of the invention as protected and covered.

FIG. 2 is a schematic flowchart of a method for allocating a video service resource according to an embodiment of the present invention. The following description is made from the base station side in conjunction with FIG. 2. As shown in FIG. 2, the method may include the following steps S201-S203. .

Step S201: The base station acquires a current cache state of the video service of the terminal.

Specifically, the base station acquires the current buffer status of the video service of the terminal, and estimates the current buffer status of the terminal video service by using the size and time information of the downlink IP packet of the video stream to reach the base station. When the information interface of the video service related information is set between the base station and the terminal, the base station directly receives the current cache information or related parameter information of the video service sent by the terminal (for example, the terminal actively reports to the base station whether the current video playback is stable. State, or report the cache state, code rate and other related parameters). In the process of video playback, the cache status can directly reflect the user's current video playback situation, and even predict whether the video will be stuck or fluent in the future, and whether the video can be played smoothly. Seriously affecting the experience and mood of the user when watching the video. Therefore, in the present invention, by using the direct acquisition or the budget estimation of the current buffer status of the video service of the terminal by the base station, it is determined which cache state the video service is currently in. Then, according to the determined cache state, the radio resource allocation and regulation of the video service of the terminal is performed to ensure that the user can obtain a smooth video service experience.

The cache state in the embodiment of the present invention includes an initial cache state, a cache fill state, and a cache stable state. The initial buffering state indicates that the video service is initially in the buffering state before the video service is started. The buffering state indicates that the current playable duration in the buffering area is less than the preset time threshold and the current playable duration increases. The value is greater than the preset rate threshold. The cache stable state indicates that the current playable duration in the buffer is greater than or equal to the preset time threshold after the video service starts playing. The growth rate of the currently playable duration is less than or equal to the preset rate threshold. For example, when the user clicks on the entertainment video, the initial buffer state is generally experienced, and the cache stable state after the start of playing, but if the number of currently watching videos is large or the wireless channel conditions are poor, the buffer of the video buffer will start to be consumed. When the consumption reaches a certain level, it enters the cache fill state, and finally, the video jam occurs when the buffer is exhausted.

Step S202: Determine a scheduling priority corresponding to a current cache state of the video service according to a preset mapping policy, where the mapping policy includes a mapping relationship between a cache state and a scheduling priority, or a buffer state and a scheduling priority algorithm. The mapping relationship between them.

Specifically, the radio resource scheduling priority is determined according to the mapping policy after the related mapping policy is set or stored in the base station side, and after the base station learns the current buffer status of the video service. Next, the specific content of the preset mapping policy and how to determine the scheduling priority of the wireless resource allocation of the video service according to the preset mapping policy are elaborated.

Since the current cache state can include an initial cache state, a cache fill state, and a cache stable state. The actual playback situation of the terminal video service in response to different buffer status is completely different. For example, when the video service is in the initial cache state or the cache fill state, the main purpose of determining the scheduling priority of the video service is to adjust the The scheduling priority of the video service is such that the current cache state of the video service can eventually tend to be cache stable, so that the user can smoothly play the video. When the video service is already in the cache stable state, since the state is stable at this time, it is obvious that the main purpose of adjusting or determining the scheduling priority of the video service is not to make it tend to cache the steady state, but to maintain the current state. Good momentum (cache stable state), and the regulation process requires more precise and complicated calculations than the above two states. Therefore, the present invention gives the above three buffer states and their respective corresponding control purposes. The following different solutions are available.

For the initial cache state and the cache padding state, the embodiment of the present invention adopts a mapping list manner, that is, the mapping list includes a mapping relationship between a cache state and a scheduling priority, and can directly search for scheduling priorities corresponding to the two states. Level to determine its corresponding scheduling priority.

Specifically, when the video service is in the initial buffering state, the base station searches for and determines the first scheduling priority (higher priority) corresponding to the initial buffering state of the video service according to the mapping relationship between the buffering state and the scheduling priority. In order to reduce the initial buffering delay of the video user, the user can obtain a superior video viewing experience. When the video service is in the cache fill state, the base station can also be based on the cache status. The mapping relationship between the scheduling priority and the scheduling priority is used to find and determine a second scheduling priority (higher priority) corresponding to the cache filling state of the video service, so that the video service can obtain a comparison before it has entered the cache stable state. More wireless resource allocation, so as to tend to cache steady state as soon as possible. Further, the first scheduling priority is greater than the second scheduling priority, that is, the first scheduling priority corresponds to the allocated radio resource being greater than the second scheduling priority corresponding to the allocated radio resource. The reason is that before the initial playback of the video, since there is currently no buffering amount, a large scheduling priority is required to quickly enter the smooth playback phase, and the cache filling state has accumulated a certain amount of buffering, so compared with the former, Relatively less allocation of wireless resources.

It should be noted that the scheduling priority in the embodiments of the present invention may be a preferred parameter obtained through simulation, a parameter set by an empirical value, or a parameter calculated in advance by a related control algorithm, and the present invention is This is not specifically limited. It can be understood that different video services can be set with different initial priorities, and the base station can determine the final priority of the current moment of the video service according to the initial priority of the video service and the current cache state of the video service. No specific limitation. It is also understood that the amount of buffering in the embodiments of the present invention may refer to the current playable duration of the buffer area in the time dimension, or the amount of data currently playable by the buffer area in the data dimension, or may refer to Scalar for other dimensions, etc.

For the cache stable state, a more complicated control method is needed. Therefore, the embodiment of the invention uses a preset algorithm to calculate, that is, after the video service enters the cache stable state, the video is checked according to the mapping relationship between the cache state and the scheduling priority algorithm. The preset calculation formula of the scheduling priority corresponding to the cache stable state of the service, and then calculating the scheduling priority of the cache stable state of the video service according to a preset calculation formula. It can specifically include the following three implementations:

Embodiment 1:

The default calculation formula is:

P=f(K)

P is the scheduling priority, K is the ratio of the estimated video stream rate to the target video stream rate, and the K is greater than or equal to 0. For any two K values K1 and K2, when K1 is less than K2, K1 corresponds to the priority. The level P is higher than or equal to the priority P corresponding to K2. The estimated video flow rate is an average video stream rate in a preset period in which the video service enters the buffer stable state, and the target video stream rate is the video service entering the cache. Video flow rate at steady state moment Rate or an average video stream rate or a preset video stream rate within a preset time period after entering the cache stable state. Specifically, the concept of the video stream rate refers to the rate of transmission of the video data. Therefore, the estimated video stream rate in the embodiment of the present invention is determined by the base station according to the relevant parameters, and the video service enters the buffer stable state after each preset period. The corresponding average video stream rate, the target video stream rate is the video stream rate at the moment when the video service enters the buffer stable state or the average video stream rate or the preset video stream rate in the preset time period after entering the buffer stable state. Because, after the video service enters the cache stable state, the current playable duration of the buffer area reaches a certain time threshold. Therefore, if the video service enters the cache stable state, every preset period (such as 5s) The calculated average video stream rate (that is, the estimated video stream rate) and the target video stream rate are kept within a certain range, so that the cache amount of the video service buffer is stable to a certain extent. Level, thus ensuring smooth playback of the video service. It should be noted that the preset period and the preset time period mentioned in the embodiment of the present invention are not the same concept, that is, the time lengths may be consistent or inconsistent, and there is no necessary relationship between them.

In a possible implementation manner, the preset calculation formula is specifically:

σ is a judgment factor of the scheduling priority of the video service, and P is a scheduling priority of the video service in a cache stable state, where P3 is greater than P2 and smaller than P1, where A is a pre-set and judgment factor σ A first threshold for comparison, B is a second threshold value for comparison with the determination factor σ, the first threshold A is greater than the second threshold B, A is a number less than 0, and B is a number greater than 0, A And the unit of B is a second; in the preset calculation formula, the specific calculation manner of the determination factor σ is: in the preset calculation formula, by determining the size of the current judgment factor σ of the video service Determining a scheduling priority P of the video service in the cache stable state, where the value of P is P1, P2, or P3, and when σ is less than or equal to A, the scheduling priority is P1, when σ is greater than or When the value is equal to B, the scheduling priority is P2. When σ is less than B and greater than A, the scheduling priority is P3, where P1 has the highest priority, P3 is the second, and P2 has the lowest priority. Optionally, according to the historical experience value or according to the simulation result, the value of A may be -1 s, and the value of B may be 2 s, which is understandable. The specific value of the parameter in the preset calculation formula is not specifically limited. For the value of the scheduling priority involved in the embodiment of the present invention, refer to the following Table 1:

Table 1

调度优先级Scheduling priority	参考值Reference
第一优先级First priority	44
第二优先级Second priority	22
P1P1	44
P2P2	0.050.05
P3P3	0.50.5

The specific calculation method of the judgment factor σ is:

σ=B(t)-B(0);

specifically:

B(0)=T ₁ ;

Specifically, B(t) is a playable duration at a time t in a buffer area of the video service, and B(0) is a value of B(t) when t is 0, for the video service to enter The playable duration in the buffer area at the initial moment of the cache stable state; SchData(t _i ) is the video stream rate obtained by the video service at time t _i ,

It refers to the total number of transmission time intervals TTI of the radio buffer control RLC layer of the RLC layer in the τ time period from the current time t to the previous time (t-τ), where the value of t _i is t -τ to the time value corresponding to each TTI in time t, τ is the calculation update period of the determination factor σ, and the units of t, τ, and t _i are all seconds.

Wherein, in a possible implementation manner, S' ₃ (t-τ)=StreamingTurningFactor·S ₃ (t-τ);

Specifically, S' ₃ (t-τ) represents the target video stream rate of the rate control at (t-τ) time, and the unit is bps (bps=bits/s=bytes/8s, 1 Bps transmits 1 Byte data every 8 seconds) It is equal to the StreamingTurningFactor (the video stream adjustment factor, which can be regarded as an adjustment factor) of the input video stream rate S3 of the base station, that is, S' ₃ (t-τ)=StreamingTuringFactor·S ₃ (t-τ). Optionally, the value of the target video stream rate S' ₃ (t-τ) may also be a video stream rate when the video service enters the buffer stable state; or the periodically acquired video service enters the cache stable state. The subsequent video stream rate; or a preset video stream rate.

on

The specific calculation method is: when the buffer time of the radio link control (RLC) layer is not empty within the current transmission time interval (TTI) transmitted by the base station, then RLCBufferNotEmpty(t _i ) =1; when the buffer Buffer of the RLC layer is empty in the current TTI transmitted by the base station, then RLCBufferNotEmpty(t _i )=0. which is

The essential meaning is that the buffer buffer of the RLC layer is the total number of non-empty TTIs in the time period τ from t _i to t. That is, only the buffered TTI is calculated, and the TTI for which the buffer is empty can be neglected. This calculation method can better control the video rate.

It can be understood that the unit of B(t) is seconds (/s), and the range of B(t) is B _min ≤ B(t) ≤ B _max .

among them,

B _min = T ₁ + A;

B _max = T ₁ + B;

It can also be understood that, in a special case, when the buffer Buffer of the RLC in the τ period is empty, and the total amount of video streams accumulated in the τ period is 0, B(t)=B(t -τ);

It should be noted that, after the video service enters the cache stable state, the scheduling priority of the current time may be calculated according to the foregoing preset calculation formula every time period τ. It can be understood that each parameter in the preset calculation formula may be calculated by the base station itself through the size of the data packet and the corresponding time information related to the video service, or may be actively sent by the base station receiving terminal. In the specific calculation method of the judgment factor σ, it can be seen that the video stream rate after the video service enters the buffer stable state is maintained at the target video stream rate S' ₃ (t-τ) level, at this time, at time t The current playable duration in the buffer area of B(t) and B(0) that has just entered the cache stable time is the same, that is, the value of the judgment factor σ is 0, which is an ideal state. For example, when t is 1s and 2s respectively (1s and 2s after entering the cache stable state), B(t) is specifically:

The period τ may also be a preset period for updating the priority of the video service, and the present invention does not specifically limit the value of τ.

Embodiment 2:

In the prior art, the output of the video service in the cache stable state is very regular, and the Media Segment Duration (MSD) is fixed, and is downloaded during the download and playback of the fragment. New shards. In general, the segmentation time (Segment Fetch Time) is less than the MSD in the cache stable state. The terminal generally does not request the next slice after the slice is downloaded, but waits until the current slice is played. Download the next shard, that is, the interval between downloads of two shards is the duration of one shard. It can be understood that when the historical slice download time is closer to the slice playable duration, the wireless resource of the current slice download can be predicted. It can not be used enough. It may just be that the downloaded piece will need to be played immediately. If the download length of the slice is slightly extended, the phenomenon may be stuck. When the download duration of the historical slice is much smaller than the playable duration of the slice, it means that the download of the slice is relatively smooth, and it can be predicted that the currently allocated wireless resource is sufficient. Therefore, in this implementation manner, the preset calculation formula is:

P=f(L)

The third threshold for comparison, D is the pre-set for the ratio

Optionally, C has a value of 1.0 and D has a value of 1.5. That is, at the start time of each slice download, the scheduling priority of the video service in the slice is calculated according to the above preset calculation formula. The starting time of each fragment downloading may be determined according to the request GET request sent by the uplink of the user terminal. Whether the uplink GET request packet is further identified according to whether the valid data of the uplink packet of the video stream is greater than 100 bytes.

In a possible implementation manner, the specific manner of calculating the AvgSFT(n-1) is:

AvgSFT(n-1)=(1-α)·AvgSFT(n-2)+α·SFT(n-1), where α is a filter coefficient, and α is in a range of more than 0 and less than 1. That is, the alpha filtering algorithm is adopted, in which the coefficient α can be taken as 0.5.

Embodiment 3:

The preset calculation formula is:

P=f(M)

The second embodiment differs from the second embodiment in that the second embodiment is based on the average download time of the slice download time, and the third embodiment is based on the current slice download duration. The scheduling priority is determined, that is, the closer the current slice download duration is to the slice playable duration, which means that the current resource is not enough. If the slice download duration is slightly extended, the click phenomenon may occur. When the current slice download duration is much smaller than the slice playable duration, it means that the slice download is relatively smooth, indicating that the currently allocated wireless resources are sufficient.

In a possible implementation manner, the preset calculation formula is a fourth calculation formula, where the fourth calculation formula is specifically:

The P(t ⁿ ) is the scheduling priority of the video service at the current time t, the MSD is the fragmentable playable duration, and the current time t is the nth after the video service enters the cache stable state. Within the time range of the slice download, HOL(t ⁿ ) is the download time of the currently used slice for the nth slice where the current time t is located. It can be understood that the range of HOL(t ⁿ ) ranges from 0 to the length of time used for the download of the slice. In a practical application scenario, the scheduling priority of the video service may be updated according to the above calculation formula in each transmission time interval (TTI) of each slice download, such as 1 ms.

Step S203: Perform radio resource allocation for the video service according to the scheduling priority. The higher the scheduling priority, the more radio resources are allocated.

Specifically, after the base station calculates the scheduling priority of the video service of the terminal according to the method in step S202, the radio resource is allocated according to the scheduling priority, and the higher the scheduling priority, the buffer status of the current user terminal is already in an emergency. The state, that is, the card state may occur due to insufficient playable duration of the buffer area and the slow rate of the received video stream, so that more radio resources need to be allocated immediately; the lower the scheduling priority, the user terminal The current cache state of the video service is in a relatively abundant state, that is, the playable duration of the buffer area is large and the received video stream rate is fast, so that the card will not appear for a while, and may not be in the future period of time. In order to make reasonable use of limited wireless communication resources, the base station considers that the current video service of the user does not need more radio resources, and can even reduce the allocation of some wireless resources to give other buffers. Fewer users, thus achieving the beneficial effect of balanced resource allocation. It can be understood that the embodiments of the present invention may also control the code rate of the video service based on the radio resource, or other parameters, as long as the essence is the control mode of controlling the radio resources of the video service distributed to the terminal, It is within the scope of the protection of the present invention.

In the embodiment of the present invention, the current cache state of the video service of the terminal is obtained by the base station, and the scheduling priority corresponding to the current cache state of the video service is determined according to the preset mapping policy, and finally, according to the scheduling priority, The video service performs radio resource allocation. That is, by using the direct acquisition or the budget estimation of the current cache state of the video service of the terminal by the base station, the current cache state of the video service is determined, and then the cache state corresponding to the cache state is determined according to the determined cache state and the preset mapping policy. Scheduling the priority, and finally adjusting the radio resources of the video service according to the determined scheduling priority, so that the video service of the terminal can be played more smoothly when the radio resources are limited, and the resource utilization can be maximized. To ensure the quality and smoothness of video playback, User experience.

In order to facilitate the better implementation of the above described aspects of the embodiments of the present invention, the present invention also provides an apparatus for cooperatively implementing the above aspects. The following is a detailed description of the structure of the embodiment of the base station provided by the present invention shown in FIG. 3:

As shown in FIG. 3, the base station 10 includes at least one processor 101, at least one memory 102, and at least one communication interface 103. In addition, the base station may also include general components such as an antenna, which will not be described in detail herein.

The processor 101 can be a general purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of the above program.

The communication interface 103 is configured to communicate with other devices or communication networks, such as Ethernet, Radio Access Network (RAN), Wireless Local Area Networks (WLAN), and the like.

The memory 102 can be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or other type that can store information and instructions. The dynamic storage device can also be an Electrically Erasable Programmable Read-Only Memory (EEPROM), a Compact Disc Read-Only Memory (CD-ROM) or other optical disc storage, and a disc storage device. (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program code in the form of instructions or data structures and can be Any other media accessed, but not limited to this. The memory can exist independently and be connected to the processor via a bus. The memory can also be integrated with the processor.

The memory 102 is configured to store application code for executing the above solution, and is controlled by the processor 101. Specifically, the processor 101 is configured to invoke the program code stored in the memory 102 to perform the following steps:

Obtaining the current cache status of the video service of the terminal;

Determining, according to a preset mapping policy, a scheduling priority corresponding to a current cache state of the video service, where the mapping policy includes a mapping relationship between a cache state and a scheduling priority, or a cache state and a a mapping relationship with a scheduling priority algorithm;

Specifically, the processor 101 is configured to obtain a current cache status of the video service of the terminal, specifically:

The processor 101 is configured to determine, according to a preset mapping policy, a scheduling priority corresponding to a current cache state of the video service, specifically:

Further, the processor 101 is configured to obtain a current cache status of the video service of the terminal, specifically:

Further, the processor 101 is configured to acquire a current cache status of the video service of the terminal, specifically:

Calculating the scheduling superiority corresponding to the cache stable state of the video service according to the preset calculation formula The first level is the third scheduling priority.

Further, the preset calculation formula is:

P=f(K)

Further, the preset calculation formula is:

Further, the preset calculation formula is:

P=f(L)

Further, the preset calculation formula is:

The third threshold for comparison, D is the pre-set for the ratio

Still further, the specific manner of calculating the AvgSFT(n-1) is:

Further, the preset calculation formula is:

P=f(M)

Further, the preset calculation formula is:

It can be understood that the functions of the functional modules in the base station 10 can be referred to the specific implementation manners in the foregoing method embodiments in FIG. 1 to FIG. 2, and details are not described herein again.

Referring to FIG. 4, FIG. 4 is a schematic structural diagram of a video service resource allocation apparatus according to an embodiment of the present invention. The apparatus 20 may include: an obtaining module 201, a determining module 202, and an allocating module 203. It can be understood that the module in this embodiment is 201, 202, and 203 correspond to the role played by the processor 101 in the embodiment of FIG. 3, wherein

The obtaining module 201 is configured to acquire a current cache state of the video service of the terminal.

The determining module 202 is configured to determine a current cache of the video service according to a preset mapping policy. a scheduling priority corresponding to the state, where the mapping policy includes a mapping relationship between the cache state and the scheduling priority or a mapping relationship between the cache state and the scheduling priority algorithm;

The allocating module 203 is configured to perform radio resource allocation for the video service according to the scheduling priority. The higher the scheduling priority, the more radio resources are allocated.

Specifically, the obtaining module 201 is specifically configured to:

The determining module 202 is specifically configured to:

Further, the obtaining module 201 is specifically configured to:

The determining module 202 is specifically configured to:

Further, the obtaining module 201 is specifically configured to:

Further, referring to FIG. 5, FIG. 5 is a schematic structural diagram of another video service resource allocation apparatus according to an embodiment of the present invention. In the apparatus 20, the determining module 202 may include a searching unit 2021 and a computing unit 2022, where

The searching unit 2021 is configured to: if the current cache state is a cache stable state, search for a preset calculation formula of a scheduling priority currently corresponding to the video service according to a mapping relationship between the cache state and a scheduling priority algorithm;

The calculating unit 2022 is configured to calculate a cache stability of the video service according to the preset calculation formula The scheduling priority corresponding to the fixed state is the third scheduling priority.

Further, the preset calculation formula is:

P=f(K)

Further, the preset calculation formula is:

Further, the preset calculation formula is:

P=f(L)

Further, the preset calculation formula is:

The third threshold for comparison, D is the pre-set for the ratio

Still further, the specific manner of calculating the AvgSFT(n-1) is:

Further, the preset calculation formula is:

P=f(M)

Further, the preset calculation formula is:

It is to be understood that the functions of the modules in the video service resource allocation device 20 may be corresponding to the specific implementation manners in the foregoing method embodiments in FIG. 1 to FIG. 2 , and details are not described herein again.

The embodiment of the present invention further provides a computer storage medium, wherein the computer storage medium may store a program, and the program includes some or all of the steps of any one of the video service resource allocation methods described in the foregoing method embodiments.

Although the present invention has been described herein in connection with the embodiments of the present invention, it will be understood by those skilled in the <RTIgt; Other variations of the disclosed embodiments are achieved. In the claims, "includes" The word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude a plurality of instances. A single processor or other unit may fulfill several of the functions recited in the claims. Certain measures are recited in mutually different dependent claims, but this does not mean that the measures are not combined to produce a good effect.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, apparatus (device), or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code. The computer program is stored/distributed in a suitable medium, provided with other hardware or as part of the hardware, or in other distributed forms, such as over the Internet or other wired or wireless telecommunication systems.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of the methods, apparatus, and computer program products of the embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

While the invention has been described with respect to the specific embodiments and embodiments thereof, various modifications and combinations may be made without departing from the spirit and scope of the invention. Accordingly, the description and drawings are merely illustrative of the invention as defined by the appended claims Any and all modifications, variations, combinations or equivalents within the scope of the invention. It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the invention

Claims

A video service resource allocation method, comprising:

The base station acquires a current buffer status of the video service of the terminal;

Determining, according to a preset mapping policy, a scheduling priority corresponding to a current cache state of the video service, where the mapping policy includes a mapping relationship between a cache state and a scheduling priority or a relationship between a cache state and a scheduling priority algorithm Mapping relations;

Performing radio resource allocation for the video service according to the scheduling priority. The higher the scheduling priority, the more radio resources are allocated.
The method of claim 1, wherein the acquiring, by the base station, the current cache status of the video service of the terminal includes:

If the video service does not start playing, the current cache state is an initial cache state;

Determining, according to a preset mapping policy, a scheduling priority corresponding to a current cache state of the video service, including:

And determining, according to the mapping relationship between the cache state and the scheduling priority, that the current scheduling priority of the video service is the first scheduling priority.
The method according to claim 2, wherein the acquiring, by the base station, the current cache status of the video service of the terminal includes:

If the video service starts playing, the current playable duration in the buffer is less than the preset time threshold, and the current playable duration is greater than the preset rate threshold, and the current cache state is the cache fill state;

Determining, according to a preset mapping policy, a scheduling priority corresponding to a current cache state of the video service, including:

Determining, according to the mapping relationship between the cache state and the scheduling priority, that the current scheduling priority of the video service is the second scheduling priority, where the current scheduling state is the second scheduling priority, the first scheduling The priority is higher than the second scheduling priority.
The method according to any one of claims 1-3, wherein the acquiring, by the base station, the current cache status of the video service of the terminal includes:

After the video service starts playing, the current playable duration in the buffer is greater than or equal to the preset time threshold, and the current playable duration growth rate is less than or equal to the preset rate threshold, and the current cache state is cache stable. status;

Determining, according to a preset mapping policy, a scheduling priority corresponding to a current cache state of the video service, including:

If the current cache state is a cache stable state, the preset calculation formula of the scheduling priority corresponding to the video service is searched according to the mapping relationship between the cache state and the scheduling priority algorithm;

And calculating, according to the preset calculation formula, a scheduling priority corresponding to a cache stable state of the video service to a third scheduling priority.
The method of claim 4 wherein said predetermined calculation formula is:

P=f(K)

P is the scheduling priority, K is the ratio of the estimated video stream rate to the target video stream rate, and the K is greater than or equal to 0. For any two K values K1 and K2, when K1 is less than K2, K1 corresponds to the priority. Level P is higher than or equal to the priority P corresponding to K2;

The estimated video flow rate is an average video stream rate in a preset period in which the video service enters the buffer stable state, and the target video stream rate is the video service entry point. The video stream rate at the time of the cache steady state or the average video stream rate or the preset video stream rate in the preset time period after entering the buffer stable state.
The method of claim 4 wherein said predetermined calculation formula is:

σ is a judgment factor of the scheduling priority of the video service, and P is a scheduling priority of the video service in a cache stable state, where P3 is greater than P2 and smaller than P1, where A is preset for The first threshold value compared with the judgment factor σ, B is a second threshold value for comparison with the determination factor σ, the first threshold value A is greater than the second threshold value B, A is a number less than 0, and B is greater than 0. The number of units A and B are both seconds; in the preset calculation formula, the specific calculation method of the judgment factor σ is:

Where B(t) is the playable duration of the video service in the buffer area at time t, and B(0) is the value of B(t) when t is 0, for the video service to enter the location The playable duration in the buffer area at the initial moment of the cache stable state; SchData(t i ) is the video stream rate obtained by the video service at time t i ,
For the total amount of video streams accumulated in the τ time period from the current time t to the previous time (t-τ), S' 3 (t-τ) is the target video stream rate at the time of (t-τ),
It refers to the total number of transmission time intervals TTI of the radio buffer control RLC layer in the τ time period from the current time t to the previous time (t-τ), wherein the value of t i is t -τ to the time value corresponding to each TTI in time t, τ is the calculation update period of the determination factor σ, and the units of t, τ, and t i are all seconds.
The method of claim 4 wherein said predetermined calculation formula is:

P=f(L)

P is the scheduling priority, L is the ratio of the current slice playable duration to the historical average slice download duration, and the L is greater than or equal to 0. For any two L values L1 and L2, when L1 is less than L2, L1 The corresponding priority P is higher than or equal to the priority P corresponding to L2;

The historical average slice download duration is an average duration of all the slice downloads after the video service enters the cache stable state and before the current slice download.
The method of claim 4 wherein said predetermined calculation formula is:

P(n) is the scheduling priority of the nth fragment download currently located after the video service enters the cache stable state, P3 is greater than P2 and less than P1, and MSD is fragmentable playable duration, SFT(n-1) The (n-1) slice download duration after the video service enters the cache stable state, and the AvgSFT(n-1) is the front of the video service after entering the cache stable state (n-1) The average duration of the downloads of the fragments, where C is the pre-set for the ratio
The third threshold for comparison, D is the pre-set for the ratio
A fourth threshold for comparison is performed, the third threshold C is less than the fourth threshold D, and C and D are both positive numbers.
The method of claim 8 wherein the specific manner of calculating said AvgSFT(n-1) is:

AvgSFT(n-1)=(1-α)·AvgSFT(n-2)+α·SFT(n-1), where α is a filter coefficient, and α is in a range of more than 0 and less than 1.
The method of claim 4 wherein said predetermined calculation formula is:

P=f(M)

P is the scheduling priority, and M is the ratio of the slack playable duration to the current slicing download duration. The M is greater than or equal to 0. For any two M values M1 and M2, when M1 is less than M2, M1 corresponds to The priority P is higher than or equal to the priority P corresponding to M2;

The download duration of the current fragment is the download duration currently used by the current fragment download after the video service enters the cache stable state.
The method of claim 4 wherein said predetermined calculation formula is:

The P(t n ) is the scheduling priority of the video service at the current time t, the MSD is the fragmentable playable duration, and the current time t is the nth after the video service enters the cache stable state. Within the time range of the slice download, HOL(t n ) is the download time of the currently used slice for the nth slice where the current time t is located.
A video service resource allocation device, comprising:

An obtaining module, configured to acquire a current cache state of a video service of the terminal;

a determining module, configured to determine, according to a preset mapping policy, a scheduling priority corresponding to a current cache state of the video service, where the mapping policy includes a mapping relationship between a cache state and a scheduling priority, or a cache state and a scheduling priority Mapping relationship between level algorithms;

And an allocating module, configured to perform radio resource allocation for the video service according to the scheduling priority, where the higher the scheduling priority, the more allocated radio resources.
The device according to claim 12, wherein the obtaining module is specifically configured to:

If the video service does not start playing, the current cache state is an initial cache state;

The determination module is specifically used to:

And determining, according to the mapping relationship between the cache state and the scheduling priority, that the current scheduling priority of the video service is the first scheduling priority.
The device according to claim 13, wherein the obtaining module is specifically configured to:

If the video service starts playing, the current playable duration in the buffer is less than the preset time threshold, and the current playable duration is greater than the preset rate threshold, and the current cache state is the cache fill state;

The determining module is specifically configured to:

Determining, according to the mapping relationship between the cache state and the scheduling priority, that the current scheduling priority of the video service is the second scheduling priority, where the current scheduling state is the second scheduling priority, the first scheduling The priority is higher than the second scheduling priority.
The device according to any one of claims 12-14, wherein the obtaining module is specifically configured to:

After the video service starts playing, the current playable duration in the buffer is greater than or equal to the preset time threshold, and the current playable duration growth rate is less than or equal to the preset rate threshold, and the current cache state is cache stable. status;

The determining module includes:

a searching unit, configured to: if the current cache state is a cache stable state, search for a preset calculation formula of a scheduling priority corresponding to the video service according to a mapping relationship between the cache state and a scheduling priority algorithm;

The calculating unit is configured to calculate, according to the preset calculation formula, a scheduling priority corresponding to a cache stable state of the video service to a third scheduling priority.
The apparatus according to claim 15, wherein said preset calculation formula is:

P=f(K)

P is the scheduling priority, K is the ratio of the estimated video stream rate to the target video stream rate, and the K is greater than or equal to 0. For any two K values K1 and K2, when K1 is less than K2, K1 corresponds to the priority. Level P is higher than or equal to the priority P corresponding to K2;

The estimated video flow rate is an average video stream rate in a preset period in which the video service enters the buffer stable state, and the target video stream rate is the video service entry point. The video stream rate at the time of the cache steady state or the average video stream rate or the preset video stream rate in the preset time period after entering the buffer stable state.
The apparatus according to claim 15, wherein said preset calculation formula is:

σ is a judgment factor of the scheduling priority of the video service, and P is a scheduling priority of the video service in a cache stable state, where P3 is greater than P2 and smaller than P1, where A is a pre-set and judgment factor σ A first threshold for comparison, B is a second threshold value for comparison with the determination factor σ, the first threshold A is greater than the second threshold B, A is a number less than 0, and B is a number greater than 0, A The units of B and B are both seconds; in the preset calculation formula, the specific calculation method of the judgment factor σ is:

Where B(t) is the playable duration of the video service in the buffer area at time t, and B(0) is the value of B(t) when t is 0, for the video service to enter the location The playable duration in the buffer area at the initial moment of the cache stable state; SchData(t i ) is the video stream rate obtained by the video service at time t i ,
For the total amount of video streams accumulated in the τ time period from the current time t to the previous time (t-τ), S' 3 (t-τ) is the target video stream rate at the time of (t-τ),
It refers to the total number of transmission time intervals TTI of the radio buffer control RLC layer in the τ time period from the current time t to the previous time (t-τ), wherein the value of t i is t -τ to the time value corresponding to each TTI in time t, τ is the calculation update period of the determination factor σ, and the units of t, τ, and t i are all seconds.
The apparatus according to claim 15, wherein said preset calculation formula is:

P=f(L)

P is the scheduling priority, L is the ratio of the current fragmentable play duration and the historical average slice download duration, and the L is greater than or equal to 0. For any two L values L1 and L2, when L1 is less than L2, The priority P corresponding to L1 is higher than or equal to the priority P corresponding to L2;

The historical average slice download duration is an average duration of all the slice downloads after the video service enters the cache stable state and before the current slice download.
The apparatus according to claim 15, wherein said preset calculation formula is:

P(n) is the scheduling priority of the nth fragment download currently located after the video service enters the cache stable state, P3 is greater than P2 and less than P1, and MSD is fragmentable playable duration, SFT(n-1) The (n-1) slice download duration after the video service enters the cache stable state, and the AvgSFT(n-1) is the front of the video service after entering the cache stable state (n-1) The average duration of the downloads of the fragments, where C is the pre-set for the ratio
The third threshold for comparison, D is the pre-set for the ratio
A fourth threshold for comparison is performed, the third threshold C is less than the fourth threshold D, and C and D are both positive numbers.
The apparatus according to claim 19, wherein the specific manner of the AvgSFT(n-1) is:

AvgSFT(n-1)=(1-α)·AvgSFT(n-2)+α·SFT(n-1), where α is a filter coefficient, and α is in a range of more than 0 and less than 1.
The apparatus according to claim 15, wherein said preset calculation formula is:

P=f(M)

P is the scheduling priority, and M is the ratio of the slack playable duration to the current slicing download duration. The M is greater than or equal to 0. For any two M values M1 and M2, when M1 is less than M2, M1 corresponds to The priority P is higher than or equal to the priority P corresponding to M2;

The download duration of the current fragment is the download duration currently used by the current fragment download after the video service enters the cache stable state.
The apparatus according to claim 15, wherein said preset calculation formula is:

The P(t n ) is the scheduling priority of the video service at the current time t, the MSD is the fragmentable playable duration, and the current time t is the nth after the video service enters the cache stable state. Within the time range of the slice download, HOL(t n ) is the download time of the currently used slice for the nth slice where the current time t is located.