CN101052119A - Control method, device and use for video frequency ordering - Google Patents

Abstract

The invention discloses a video-on-demand control method, which includes 1) receiving a user's request for video-on-demand; 2) judging the user level according to user information; and 3) performing on-demand control according to the user level. It overcomes the problem that each on-demand service uses a fixed on-demand rate in the prior art, which cannot meet the needs of different customers. The invention also discloses a video-on-demand control device including a policy data unit, a policy selection unit, a calculation unit, an admission control unit, a rate adjustment unit, a forced termination unit, and a billing control unit; The relationship between the egress bandwidth value and the egress bandwidth threshold value and the total maximum egress bandwidth of the VoD server is used to determine whether to accept the user's on-demand request, and the control strategy selection unit selects the corresponding strategy of the strategy data unit. The invention also discloses a video-on-demand system using the video-on-demand control device, so as to realize the rate control of the video-on-demand server and improve the control effect.

Description

Control method, device and application of video on demand

technical field

The invention relates to a video-on-demand system, in particular to a video-on-demand control method, device and application.

Background technique

With the rapid development of broadband services, VoD (Video on Demand) is more and more widely used. The emergence of VoD enables users to access video-on-demand servers through the network, and order various programs such as TV, movies, music or entertainment according to personal hobbies or needs. Users don't have to stick to traditional schedules, such as sitting in front of the TV waiting for a desired TV show. Users only need to open the client terminal to directly click on the program they want to watch. And the user does not need to be disturbed by advertisements in the traditional TV system, and fully realizes that the user has the initiative to obtain information. VoD enables users to change from a passive receiving method to an active or interactive receiving method.

Referring to Fig. 1, a VoD system generally consists of three parts: a VoD server, a transmission network and a client. The VoD server is the core component of the VoD system, which is used to compress, store and process audio and video data, and realize the transmission and sharing of audio and video data. The function of the transmission network is to provide real-time transmission of audio and video data, and send the audio and video data to the user's client. The client completes various control functions such as decoding and playing functions of on-demand programs, program selection, and recording. Currently, there are mainly two types of clients, one is a common PC, and the other is a TV with a set-top box.

The egress bandwidth of the VoD server is limited. With the increase of VoD users, the on-demand services that need to be processed at the same time also increase accordingly. Therefore, the export bandwidth of the VOD server will become the bottleneck of system expansion. The processing performance of the VoD server is directly related to the service capability of the system, so it is necessary to control the on-demand rate of each VoD user's on-demand request to limit the egress bandwidth it occupies.

The application number is 200410065742.9, and the invention patent titled "Measurement-Based Adaptive Admission Control Method for Video-on-Demand System" discloses an admission control method for Video-on-demand system. The method includes dividing access into different service categories according to the decoding rate; calculating in advance or pre-calculating the normal average bandwidth of a single stream and the probability quantile point of this type of service for each type of access; when a new service request arrives, calculate the The current probability quantile of , and the expected probability quantile of this class; if the current probability quantile of each type of service is greater than the expected probability quantile, it will be accepted, otherwise it indicates that the server is overloaded and rejected.

The above-mentioned prior art is applicable to the admission control of the video-on-demand system. Although the admission control of the video-on-demand system can be realized, the measurement-based adaptive admission control method of the above-mentioned video-on-demand system has the following deficiencies:

1. The accuracy of admission control is not high. The existing technology is based on probability calculation. The normal average bandwidth of a single flow is calculated in advance or pre-calculated for each type of access. Due to certain errors in the calculation, admission control is judged based on calculation, and the accuracy of admission control is difficult to guarantee.

2. Each on-demand service uses a fixed on-demand rate, which cannot meet the needs of different customers.

3. Limited by the VoD server outlet bandwidth, the user access rate cannot be further improved.

Contents of the invention

The purpose of the present invention is to provide a method for controlling video-on-demand, so as to overcome that each on-demand service uses a fixed on-demand rate in the prior art, which cannot meet the needs of different customers.

Another object of the present invention is to provide a kind of control method of video on demand, comprising steps:

1). Receive user on-demand requests;

2). Judge the user level according to the user information;

3). According to the user level, perform on-demand control.

In the step 2), the user grades are three grades:

A-level users: no VOD rate guarantee, and VOD services can only be obtained when the load of the VOD server is light;

Class B users: For on-demand services, there are k kinds of on-demand rates;

Class C users: For on-demand services, a fixed on-demand rate c is given;

Among them, k: the number of on-demand rates that B-level users can choose;

c: Constant on-demand rate for C level users.

The step 3) is specifically:

a) If the on-demand service requester is an A-level user:

When a+U<N, accept the on-demand request; otherwise, reject the on-demand request;

b) If the on-demand service requester is a B-level user:

When U≤N, accept the on-demand request and adopt the maximum on-demand rate b ₁ ;

When U>N, U+b _k ≤ M, accept the on-demand request and adopt the minimum on-demand rate b _k ;

c) If the on-demand service requester is a C-level user:

When U+c≤M, accept the on-demand request and adopt a constant on-demand rate c;

Among them, k: the number of on-demand rates that B-level users can choose;

a: On-demand rate of A-level users;

b _i : the i-th possible on-demand rate of B-level users, the range of i is 1≤i≤k, the smaller i is, the larger b _i is;

Among them, c: constant on-demand rate of C level users;

M: the total maximum egress bandwidth of the VoD server;

U: the egress bandwidth value currently used by the VoD server;

N: Egress bandwidth threshold.

The step 3) is specifically:

When the export bandwidth of the video-on-demand server is tight, the on-demand service of all A-level users who are requesting video is forcibly terminated to release the export bandwidth occupied by them.

The outlet bandwidth of the video-on-demand server is tight, specifically,

The egress bandwidth value currently used by the VOD server is greater than the egress bandwidth threshold of the VOD server.

The B-level users include,

Ordinary B level users: when the VOD server load is light, the maximum VOD rate b ₁ is given, and when the VOD server load is heavy, the VOD server is adjusted to a smaller VOD rate b _i , where the VOD rate of b _k is the smallest, _and the VOD rate of bi is between between b ₁ and b _k ;

Among them, i=1, 2...k;

Privileged B-level users: have the authority to snatch resources; when users of this level request on-demand services, when the video-on-demand server outlet bandwidth is not enough, the on-demand services of ordinary B-level or/and ordinary C-level users that have not been served are forcibly terminated in advance;

The C-level users include,

Ordinary C-level users: For on-demand services, a fixed on-demand rate c is given;

Privileged C-level users: have the authority to snatch resources; if the video-on-demand server outlet bandwidth is not enough, the on-demand services of ordinary B-level or/and ordinary C-level users who have not been served are forcibly terminated in advance.

The step 3) is specifically:

When the egress bandwidth of the video-on-demand server is insufficient, the privileged level user sends an on-demand service request to reduce the on-demand rate of the B-level users who have already ordered according to the predetermined downgrading strategy, and/or terminate the ordinary-level user’s on-demand service according to the predetermined forced termination strategy , or reject the on-demand request;

When the egress bandwidth of the video-on-demand server is not enough, the ordinary-level user sends an on-demand service request, and according to the predetermined downgrading strategy, the on-demand rate of the B-level user who has already ordered is reduced or the on-demand request is rejected.

The step 3) is specifically:

If the on-demand service requester is a B-level user, when U+b _k >M, reduce the on-demand rate of the B-level user who is on-demand, release enough egress bandwidth, and accept the on-demand request using the minimum on-demand rate b _k ;

If sufficient egress bandwidth cannot be released, for ordinary B-level users, the on-demand request will be rejected;

When U+b _k > M, ordinary B-level users send on-demand requests, by reducing the on-demand rate of one or more B-level users who are on-demand, releasing enough egress bandwidth, and accepting the on-demand request adopts the minimum on-demand rate b _k ; otherwise , rejecting the on-demand request;

When U+b _k > M, the privileged B-level user sends an on-demand request, and by reducing the on-demand rate of one or more B-level users who are on-demand, and cannot release enough egress bandwidth, one or more ordinary B-level users who are on-demand will be forcibly terminated. For the on-demand service of B-level or C-level users, enough egress bandwidth is released, and the minimum on-demand rate b _k is adopted to accept the on-demand request; otherwise, the on-demand request is rejected.

The step 3) is specifically:

When U+c>M, ordinary C-level users send on-demand requests, by reducing the on-demand rate of B-level users who are on-demand, release enough egress bandwidth, and accept the on-demand request; otherwise, reject the on-demand request if they cannot release enough egress bandwidth on-demand request;

When U+c>M, the privileged C-level user sends an on-demand request, and by reducing the on-demand rate of one or more B-level users who are on-demand, and cannot release enough egress bandwidth, forcibly terminate one or more ordinary B-level users who are on-demand Or the on-demand service of level C users, release enough egress bandwidth, accept the on-demand request; otherwise reject the on-demand request.

Said step 3) further comprises,

When certain/some users order service is terminated or order rate is reduced, notify this/some users that order service is terminated or order rate is reduced.

Said step 3) further comprises,

When a certain/some user's ordering service is terminated or the ordering rate is reduced, adjust the billing method of this/some users.

Also includes,

When the on-demand service ends normally or the user actively terminates, if the video-on-demand server outlet bandwidth is sufficient, the on-demand rate of the user with a non-fixed on-demand rate is increased according to a predetermined rate increase strategy.

When the ordering rate of a user with a non-fixed ordering rate is increased, the user is notified that the ordering rate has been increased, and the corresponding billing method is adjusted.

According to the non-fixed on-demand rate user request, adjust the non-fixed on-demand rate user's on-demand rate level according to the predetermined user rate adjustment strategy.

When the ordering rate of a user with a non-fixed ordering rate is adjusted, the user is notified that the ordering rate is adjusted, and the corresponding billing method is adjusted.

The invention also discloses a video-on-demand control device, including a policy data unit, a policy selection unit, a calculation unit, an admission control unit, a rate adjustment unit, a forced termination unit, and a charging control unit;

The policy data unit: connected to the policy selection unit, used to save the downgrade policy, the forced termination policy, the rate increase policy, and the user rate adjustment policy;

The policy selection unit: connected to the admission control unit, selects a corresponding policy from the policy data unit;

The calculation unit: connected to the admission control unit, to calculate the used egress bandwidth U value;

The admission control unit: used to set the egress bandwidth threshold N; according to the relationship between the used egress bandwidth value U calculated by the calculation unit, the egress bandwidth threshold N and the total maximum egress bandwidth M of the VoD server, determine Whether to accept the user's on-demand request, and control the strategy selection unit to select the corresponding strategy of the strategy data unit;

The rate adjustment unit: connected to the admission control unit, reduces or increases the request rate of B-level users;

The forced termination unit: connected to the admission control unit, terminates the on-demand service of A-level, ordinary B-level and/or C-level users;

The billing control unit: connected to the admission control unit, to set and adjust the corresponding billing mode.

The invention also discloses a video-on-demand system, including:

Central control unit: respectively connected with the program data unit, on-demand processing unit, communication unit, user data unit, and video-on-demand control device for coordinating and controlling each unit;

Program data unit: connected to the central control unit, used to save data files of all program content of the video-on-demand service;

On-demand processing unit: connected to the central control unit, used to process the program content in the program data unit and complete the encoding and compression of video and audio data;

Communication unit: connected to the central control unit, used for controlling and interacting with the user's client and sending the media stream of the program on demand to the user;

User data unit: connected to the central control unit, used to divide and record the user level and user information of the customized video-on-demand service users;

It is characterized in that it also includes,

Video-on-demand control device: connected to the central control unit, used to control the user's video-on-demand request according to the egress bandwidth value used by the server.

The control device for the video on demand also includes,

Calculation unit: calculate the used egress bandwidth U value;

Admission control unit: used to set the egress bandwidth threshold N; connected to the computing unit, between the used egress bandwidth value U calculated by the computing unit, the egress bandwidth threshold N and the total maximum egress bandwidth M of the VoD server relationship, determine whether to accept the user's on-demand request, and control the strategy selection unit to select the corresponding strategy of the strategy data unit;

Policy data unit: used to save the downgrade policy, forced termination policy, rate increase policy, and user rate adjustment policy;

Policy selection unit: connected to the policy selection unit and the admission control unit, and selects the corresponding policy from the policy data unit;

Rate adjustment unit: connected to the admission control unit to reduce or increase the on-demand rate of B-level users;

Forced termination unit: connected to the admission control unit, terminates the on-demand service of users of grade A, common grade B and/or C;

Charging control unit: connected to the admission control unit, to set and adjust the corresponding charging method.

Management unit: connected to the central control unit, used for user registration, logout management and billing management.

As can be seen from the above technical solutions provided by the present invention, the present invention divides service levels for users using video-on-demand services under the condition of limited bandwidth capacity at the egress of the video-on-demand server, and adopts different rate control strategies for different user levels. It enables users to obtain differentiated service performance, improves the ability of the VoD on-demand server to accept on-demand requests, and realizes the efficient use of the VoD system.

Description of drawings

FIG. 1 is a schematic diagram of a VoD system in the prior art;

Fig. 2 is the realization flowchart of the inventive method;

Fig. 3 is the control flowchart of normal termination of on-demand service;

Fig. 4 is the flow chart of the control process for the user to actively adjust the rate of request;

Fig. 5 is the structural diagram of the control device of video on demand;

Fig. 6 is a structural diagram of the application system of the video-on-demand control device.

Detailed ways

Since different users usually have different service quality requirements and different payment levels, service rate control strategies can be given to different users to meet differentiated user performance requirements while maximizing system efficiency.

Referring to Fig. 2, this figure is a flow chart of the implementation of the method of the present invention.

The control method of video on demand of the present invention comprises the steps of:

S1. Receive a user request for broadcasting;

S2. Judging the user level according to the user information;

There are three user levels:

A-level users: no VOD rate guarantee, and VOD services can only be obtained when the load of the VOD server is light;

Class B users: For on-demand services, there are k kinds of on-demand rates;

Class C users: For on-demand services, a fixed on-demand rate c is given;

B-level users can be further divided into:

Ordinary B-level users: used for general paying users, is a user whose on-demand rate can be changed; for a certain on-demand service, there are k kinds of on-demand rates, and the maximum on-demand rate b1 is given when the video-on-demand server load is light. When the on-demand server load is heavy, adjust to a smaller on-demand bi;

Wherein i=1, 2...k, bk on-demand rate is minimum;

Privileged level B users: It is used for advanced paid users, and it is also a user whose on-demand rate can be changed. It has the user level to snatch resource rights; Terminate the on-demand services of ordinary B-level or/and ordinary C-level users who have not been served in advance.

C-level users can be further divided into:

Ordinary C-level users: used for high-end paid users, who have high requirements for the quality of on-demand programs, and are users with a constant on-demand rate; for on-demand services, a fixed on-demand rate c is given;

Privileged C-level users: used for advanced paying users, who have high requirements for the quality of on-demand programs, and have the user level to snatch resource rights; if the bandwidth of the video-on-demand server outlet is not enough, the ordinary B-level or/or unfinished service can be forcibly terminated in advance And the on-demand service of ordinary C-level users.

The following explains the meaning of several parameters:

k: When using a certain on-demand service, the number of on-demand rates that B-level users can choose.

a: When using an on-demand service, the on-demand rate of A-level users.

bi: When using a certain on-demand service, the i-th possible on-demand rate of B-level users, the range of i is 1≤i≤k, the smaller i is, the larger bi is.

c: When using a certain on-demand service, the constant on-demand rate of C-level users.

M: The total maximum export bandwidth of the VoD server. The sum of the on-demand rates of all services cannot exceed this value.

U: The egress bandwidth value currently used by the VoD server.

N: the egress bandwidth threshold value, when U>N, it means that the VoD server is in a state of tight egress bandwidth.

A VoD server can provide multiple video-on-demand services at the same time, and different users may use the same or different video-on-demand services. For different services, their program content is different, and usually have different audio and video quality performance, so each service has its specific on-demand rate parameters bk, a, b1, c, and the relationship between parameters should generally satisfy a ≤bk≤b1≤c.

S3. Perform control according to the user level.

When the video-on-demand server egress bandwidth is not enough, the privileged level user sends an on-demand service request, reduces the on-demand rate of the ordinary level user and/or terminates the on-demand service of the ordinary level user and/or reduces the on-demand rate of the privileged level user or rejects the on-demand request.

When a certain/some user's ordering service is terminated or the ordering rate is reduced, this/some users are notified that the ordering service is terminated or the ordering rate is reduced, and the charging method of this/some users is adjusted.

When the egress bandwidth of the video-on-demand server is insufficient, the ordinary-level user sends an on-demand service request to reduce the ordering rate of the ordinary-level user who has ordered the video or reject the on-demand request.

When a certain/some user's ordering rate is reduced, notify this/some users that the ordering rate is reduced, and adjust the billing method of this/some user.

When requesting the same on-demand service, different admission controls are adopted for different user service levels. The following describes the admission control of the three levels of users respectively:

1) If the on-demand service requester is an A-level user:

When a+U<N, the egress bandwidth threshold is not exceeded, and the on-demand request is accepted. Otherwise, reject the on-demand request.

2) If the on-demand service requester is a B-level user:

When U≤N, the server has sufficient idle bandwidth, accepts the on-demand request, adopts the maximum optional on-demand rate b1, and sets the corresponding billing method;

When U>N, U+bk≤M, the idle outlet bandwidth of the server is tight, accept the on-demand request, but adopt the minimum optional on-demand rate bk, and set the corresponding billing method;

When U+bk>M, the idle egress bandwidth of the server is not enough, and it is necessary to reduce the on-demand rate of one or several B-level users who are on-demand according to the corresponding downgrading strategy, so as to release enough egress bandwidth so that the request can be accepted and sent The minimum on-demand rate bk is adopted.

The downgrading strategy adopted can select B-level users with the highest on-demand rate level for downgrade processing, and can also be selected according to factors such as on-demand time and billing methods. When sufficient egress bandwidth is released, accept the on-demand request and set the corresponding billing method.

If the downgrade cannot release enough egress bandwidth, for example, all B-level users currently use the minimum on-demand rate. For ordinary B-level users, the on-demand request is rejected. At this time, there will be no A-level users ordering, because all A-level users have been terminated to order services before the ordering rate of B-level users is reduced. For privileged B-level users, in addition to reducing the on-demand rate of some B-level users like ordinary B-level users, they can also forcibly terminate one or several ordinary B and/or ordinary C-level users who are on-demand according to the corresponding forced termination policy User's on-demand service. Thereby releasing sufficient egress bandwidth, so that the request can be accepted and the minimum on-demand rate bk is adopted. If still unable to release enough egress bandwidth, the current system is mainly dominated by privileged B and privileged C level users, whose service cannot be forcibly terminated, then the on-demand request of the privileged B user will be rejected.

The forced termination strategy adopted can choose the user with the highest requesting rate to forcibly terminate, or choose according to factors such as the requesting time and charging method. When sufficient egress bandwidth is released, the on-demand request is accepted and the corresponding billing method is set.

3) If the on-demand service requester is a C-level user:

When U+c<=M, the server’s idle outlet bandwidth is sufficient, accept the on-demand request, adopt a constant on-demand rate c, and set the corresponding billing method;

When U+c>M, the idle egress bandwidth of the server is not enough, and it is necessary to reduce the on-demand rate of one or several B-level users who are on-demand according to the corresponding downgrading strategy, so as to release enough egress bandwidth so that the request can be accepted. When sufficient egress bandwidth is released, the on-demand request is accepted.

For ordinary C level users, if the downgrade process fails to release enough egress bandwidth, the on-demand request is rejected.

For privileged C-level users, when sufficient egress bandwidth cannot be released through downgrade processing, the on-demand service of one or several ordinary B and/or ordinary C-level users who are on-demand can also be forcibly terminated according to the corresponding forced termination policy , thus releasing enough egress bandwidth to allow the request to be accepted. When sufficient egress bandwidth is released, the on-demand request is accepted and the corresponding billing method is set. When sufficient egress bandwidth cannot be released, the VOD request of the privileged C user is rejected.

After the VOD service ends normally, the VoD server egress bandwidth occupied by it will be released. When the egress bandwidth is restored to be sufficient, for B-class users who use lower on-demand rates, they should consider increasing their on-demand rates according to the corresponding rate increase strategy. In order to avoid relatively frequent rate adjustments, for all B-level users who do not use the maximum optional request rate, when the idle server outlet bandwidth is sufficient for all these users to increase a request rate level, then increase the request rate of these users at the same time One level, otherwise no rate increase processing is performed. Of course, it is also possible to determine to increase the ordering rate of the B-level user and the increased rate level according to the ordering time or the ordering frequency.

Referring to FIG. 3 , this figure is a control flow chart of the normal termination of the on-demand service.

S10. The on-demand program ends normally or the user actively terminates the on-demand program; when the user's on-demand program ends normally or actively terminates the on-demand program, the egress bandwidth rate resource occupied by it can be released.

S20. Recalculate the used egress bandwidth U value;

S30. Perform billing-related processing;

S40. According to the corresponding rate increase strategy, it is determined whether the on-demand rate can be increased for certain B-level users, and if the rate increase operation cannot be implemented, then step S80 is performed;

S50. When the rate can be increased, increase the selected B-level users to a certain on-demand rate, and adjust the corresponding charging method;

S60. Notify the B-level user that its on-demand rate has been increased to a new level;

S70. Recalculate the used egress bandwidth U value;

S80. The control process ends.

When B level users actively request to adjust their on-demand rate level. If the corresponding user rate adjustment policy is met, the server accepts the request.

Referring to Fig. 4, this figure is the flow chart of the control process for the user to actively adjust the rate of request:

S100. Receive a rate adjustment request from a class B user;

S200. Determine whether to perform rate adjustment according to the current server egress bandwidth status and the corresponding user rate adjustment policy. If the rate cannot be adjusted, the user is notified that the request cannot be accepted, and step S600 is executed;

S300. If rate adjustment is possible, adjust the user's on-demand rate and adjust the corresponding billing method;

S400. Notify the user that the rate adjustment is successful;

S500. Recalculate the used egress bandwidth U value;

S600. The control process ends.

Another object of the present invention is to provide a video-on-demand control device and its application, so as to realize video-on-demand rate control and improve the control effect.

Referring to FIG. 5 , it is a structural diagram of a video-on-demand control device.

The control device 4 of video on demand comprises, strategy data unit 43, strategy selection unit 44, calculation unit 41, admission control unit 42, rate adjustment unit 45, forced termination unit 46, billing control unit 47; For receiving request user information, Control user requests according to the egress bandwidth value used by the server.

Policy data unit 43: connected to the policy selection unit 44, used to save the downgrading policy, the forced termination policy, the rate promotion policy, and the user rate adjustment policy;

Policy selection unit 44: connected to the admission control unit 42, and selects the corresponding policy from the policy data unit 43;

Calculation unit 41: connected to the admission control unit 42, to calculate the used egress bandwidth U value;

Admission control unit 42: used to set the egress bandwidth threshold N; according to the relationship between the used egress bandwidth U and the egress bandwidth threshold N and the total maximum egress bandwidth M of the VoD server, determine whether to accept the user's on-demand request, The control strategy selection unit 44 selects a strategy corresponding to the strategy data unit 43;

Rate adjustment unit 45: connected to the admission control unit 42, to reduce or increase the ordering rate of B-level users;

Forced termination unit 46: connected to the admission control unit 42, terminates the on-demand service of A, ordinary B or/and C level users;

Charging control unit 47: connected to the admission control unit 42, to set and adjust the corresponding charging method.

The working process of the device will be described below by taking users of grades A, B and C as examples.

If the on-demand service requester is an A-level user:

Calculation unit 41, calculating the currently used egress bandwidth value U;

The admission control unit 42 judges whether the sum of the currently used egress bandwidth value U and the order rate a of the A-level user is less than the egress bandwidth threshold value N;

When a+U<N, the on-demand request is accepted if the egress bandwidth threshold is not exceeded; otherwise, the on-demand request is rejected.

If the on-demand service requester is a B-level user:

Calculation unit 41, calculating the currently used egress bandwidth value U;

The admission control unit 42 determines the relationship between the currently used egress bandwidth value U and the egress bandwidth threshold N and the total maximum egress bandwidth M of the VoD server;

When U≤N, the server has sufficient bandwidth at the idle exit, accepts the on-demand request, and adopts the maximum optional on-demand rate b ₁ ;

When U>N, U+b _k ≤ M, the idle outlet bandwidth of the server is tight, accept the on-demand request, and adopt the minimum optional on-demand rate b _k ;

When U+b _k >M, the idle egress bandwidth of the server is not enough, the admission control unit 42 controls the policy selection unit 44 to select the downgrade strategy of the policy data unit 43; the admission control unit 42 invokes the rate adjustment unit 45 according to the downgrade strategy, and determines to reduce a certain Or some ordinary B-level and privileged B-level users who are ordering can release enough egress bandwidth so that the request can be accepted and adopt the minimum on-demand rate b _k .

The billing control unit 47 adjusts the corresponding billing method for the one or those B-level users who are ordering at the reduced rate.

If sufficient egress bandwidth cannot be released through downgrading, for example, all B-level users currently use the minimum on-demand rate:

For ordinary B-level users, the on-demand request is rejected.

For privileged B level users, in addition to reducing the processing rate of some B level users the same as ordinary B level users, the admission control unit 42 controls the policy selection unit 44 to select the forced termination strategy of the policy data unit 43, and the admission control unit 42 is based on the forced termination strategy. The forcible termination unit 46 is called to determine the forcible termination of the on-demand service of one or several ordinary B or ordinary C level users who are ordering. Thereby releasing enough egress bandwidth, so that the request can be accepted, and adopt the minimum on-demand rate b _k . If it is still unable to release enough egress bandwidth, the current system mainly consists of privileged B and privileged C level users, whose service cannot be forcibly terminated, then the on-demand request of the privileged level B user will be rejected.

For the one or several ordinary B or ordinary C level users who are forcibly terminated, the billing control unit 47 adjusts the corresponding billing method.

If the on-demand service requester is a C-level user:

Calculation unit 41, calculating the currently used egress bandwidth value U;

Admission control unit 42 judges the relationship between the sum of the current egress bandwidth value U and the constant on-demand rate c of C level users and the total maximum egress bandwidth M of the VoD server;

When U+c<=M, the idle bandwidth of the server is sufficient, and the on-demand request is accepted, and the constant on-demand rate c is adopted;

When U+c>M, the idle egress bandwidth of the server is not enough, and the admission control unit 42 controls the policy selection unit 44 to select the downgrade strategy of the policy data unit 43; the admission control unit 42 calls the rate adjustment unit 45 according to the downgrade strategy, and determines to reduce a certain or The on-demand rate of some ordinary B-level and privileged B-level users who are on-demand releases enough egress bandwidth so that the request can be accepted. When sufficient egress bandwidth is released, accept the on-demand request.

The billing control unit 47 adjusts the corresponding billing method for the one or those B-level users who are ordering at the reduced rate.

For ordinary C level users, if the downgrade cannot release enough egress bandwidth, the on-demand request will be rejected.

For a privileged C level user, when sufficient egress bandwidth cannot be released by downgrading, the admission control unit 42 controls the policy selection unit 44 to select the forced termination strategy of the policy data unit 43, and the admission control unit 42 invokes the forced termination unit 46 according to the forced termination strategy to determine Forcibly terminate the on-demand service of one or several ordinary B or ordinary C level users who are on-demand, so as to release enough egress bandwidth to allow the request to be accepted. When sufficient egress bandwidth is released, accept the on-demand request. When sufficient egress bandwidth cannot be released, the VOD request of the privileged C user is rejected.

For the one or several ordinary B or ordinary C level users who are forcibly terminated, the billing control unit 47 adjusts the corresponding billing method.

Refer to FIG. 6 , which is a structural diagram of the application system of the VOD control device.

The system includes a program data unit 2 , an on-demand processing unit 8 , a communication unit 7 , a user data unit 1 , a video-on-demand control device 4 , a management unit 6 , and a central control unit 3 .

Program data unit 2: connected to the central control unit 3, used to save data files of all program contents of the video-on-demand service.

On-demand processing unit 8: connected to the central control unit 3, used to process the program content in the program data unit 2, and complete the encoding and compression of video and audio data.

Communication unit 7: connected to the central control unit 3, used for controlling and interacting with the user's client terminal and sending the media stream of the on-demand program to the user.

User data unit 1: connected to the central control unit 3, used to classify and record the user level and user information of the customized video-on-demand service users.

The control device 4 of video on demand includes,

Policy data unit 43: connected to the policy selection unit 44, used to save the downgrading policy, the forced termination policy, the rate promotion policy, and the user rate adjustment policy;

Policy selection unit 44: connected to the admission control unit 42, and selects the corresponding policy from the policy data unit 43;

Calculation unit 41: connected to the admission control unit 42, to calculate the used egress bandwidth U value;

Admission control unit 42: used to set the egress bandwidth threshold N; according to the relationship between the used egress bandwidth U and the egress bandwidth threshold N and the total maximum egress bandwidth M of the VoD server, determine whether to accept the user's on-demand request, The control strategy selection unit 44 selects a strategy corresponding to the strategy data unit 43;

Rate adjustment unit 45: connected to the admission control unit 42, to reduce or increase the ordering rate of B-level users;

Forced termination unit 46: connected to the admission control unit 42, terminates the on-demand service of A, ordinary B or/and C level users;

Charging control unit 47: connected to the admission control unit 42, to set and adjust the corresponding charging method.

Management unit 6: connected to the central control unit 3, used for user registration and cancellation management, billing management, etc., to ensure the normal operation of the system,

Central control unit 3: connected to program data unit 2, on-demand processing unit 8, communication unit 7, user data unit 1, management unit 6, and video-on-demand control device 4, for coordinating and controlling each unit.

The specific working process of video on demand:

The communication unit 7 receives a new request for an on-demand service.

The central control unit 3 queries the user data unit 1 to obtain the user information of the requesting user.

When the information of the requesting user cannot be found or the user's current service is limited, the communication unit 7 notifies the user's client that the request for the requesting service cannot be accepted, and the control process ends.

When the requesting user is available, the central control unit 3 determines the service level of the user and the rate parameter of the program requested.

When U>N, the outlet bandwidth of the VoD server is tight, and the admission control unit 42 of the video-on-demand control device 4 invokes the forced termination unit 46 to terminate the on-demand services of all A-level users in advance, releasing the outlet bandwidth occupied by them. The communication unit 7 notifies the class A user that the on-demand service is terminated.

The computing unit 41 of the video-on-demand control device 4 recalculates the used egress bandwidth U value;

The VOD control device 4 accepts the VOD control request.

The control device 4 of video-on-demand accepts the specific work process of controlling the request for video-on-demand:

If the on-demand service requester is an A-level user:

Calculation unit 41, calculating the currently used egress bandwidth value U;

The admission control unit 42 judges whether the sum of the currently used egress bandwidth value U and the order rate a of the A-level user is less than the egress bandwidth threshold value N;

When a+U<N, the on-demand request is accepted if the egress bandwidth threshold is not exceeded; otherwise, the on-demand request is rejected.

If the on-demand service requester is a B-level user:

Calculation unit 41, calculating the currently used egress bandwidth value U;

The admission control unit 42 determines the relationship between the currently used egress bandwidth value U and the egress bandwidth threshold N and the total maximum egress bandwidth M of the VoD server;

When U≤N, the server has sufficient bandwidth at the idle exit, accepts the on-demand request, and adopts the maximum optional on-demand rate b ₁ ;

When U>N, U+b _k ≤ M, the idle outlet bandwidth of the server is tight, accept the on-demand request, and adopt the minimum optional on-demand rate b _k ;

When U+b _k >M, the idle egress bandwidth of the server is not enough, the admission control unit 42 controls the policy selection unit 44 to select the downgrade strategy of the policy data unit 43; the admission control unit 42 invokes the rate adjustment unit 45 according to the downgrade strategy, and determines to reduce a certain Or the on-demand rate of some B-level users who are on-demand releases enough egress bandwidth, so that the request can be accepted and the minimum on-demand rate b _k is adopted.

The billing control unit 47 adjusts the corresponding billing method for the one or those B-level users who are ordering at the reduced rate.

If sufficient egress bandwidth cannot be released through downgrading, for example, all B-level users currently use the minimum on-demand rate:

For ordinary B-level users, the on-demand request is rejected.

For privileged B level users, in addition to reducing the processing rate of some B level users the same as ordinary B level users, the admission control unit 42 controls the policy selection unit 44 to select the forced termination strategy of the policy data unit 43, and the admission control unit 42 is based on the forced termination strategy. The forcible termination unit 46 is called to determine the forcible termination of the on-demand service of one or several ordinary B or ordinary C level users who are ordering. Thereby releasing enough egress bandwidth, so that the request can be accepted, and adopt the minimum on-demand rate b _k . If it is still unable to release enough egress bandwidth, the current system mainly consists of privileged B and privileged C level users, whose service cannot be forcibly terminated, then the on-demand request of the privileged level B user will be rejected.

For the one or several ordinary B or ordinary C level users who are forcibly terminated, the billing control unit 47 adjusts the corresponding billing method.

If the on-demand service requester is a C-level user:

Calculation unit 41, calculating the currently used egress bandwidth value U;

Admission control unit 42 judges the relationship between the sum of the current egress bandwidth value U and the constant on-demand rate c of C level users and the total maximum egress bandwidth M of the VoD server;

When U+c<=M, the idle bandwidth of the server is sufficient, and the on-demand request is accepted, and the constant on-demand rate c is adopted;

When U+c>M, the idle egress bandwidth of the server is not enough, and the admission control unit 42 controls the policy selection unit 44 to select the downgrade strategy of the policy data unit 43; the admission control unit 42 calls the rate adjustment unit 45 according to the downgrade strategy, and determines to reduce a certain or The on-demand rate of some ordinary B-level and privileged B-level users who are on-demand releases enough egress bandwidth so that the request can be accepted. When sufficient egress bandwidth is released, accept the on-demand request.

The billing control unit 47 adjusts the corresponding billing method for the one or those B-level users who are ordering at the reduced rate.

For ordinary C level users, if the downgrade cannot release enough egress bandwidth, the on-demand request will be rejected.

For a privileged C level user, when sufficient egress bandwidth cannot be released by downgrading, the admission control unit 42 controls the policy selection unit 44 to select the forced termination strategy of the policy data unit 43, and the admission control unit 42 invokes the forced termination unit 46 according to the forced termination strategy to determine Forcibly terminate the on-demand service of one or several ordinary B or ordinary C level users who are on-demand, so as to release enough egress bandwidth to allow the request to be accepted. When sufficient egress bandwidth is released, accept the on-demand request. When sufficient egress bandwidth cannot be released, the VOD request of the privileged C user is rejected.

For the one or several ordinary B or ordinary C level users who are forcibly terminated, the billing control unit 47 adjusts the corresponding billing method.

When user rate is reduced or service is terminated, communication unit 7 informs these users that its rate is reduced to a new rate or its service is terminated; order processing unit 8 performs order by new rate or stops its order service.

Calculation unit 41 recalculates the used egress bandwidth U value;

When the program is ordered for the first time, the central control unit 3 will transfer the content of the program from the program data unit 2 to the order processing unit 8; the order processing unit 8 encodes the program content by the corresponding order rate, and processes it.

The communication unit 7 sends the media stream of the on-demand program to the user's client, and the user normally watches the on-demand program; the control process ends.

The above is only a preferred embodiment of the present invention, it should be pointed out that, for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications can also be made. It should be regarded as the protection scope of the present invention.

Claims (19)

1, a kind of control method of video request program is characterized in that, comprises step:

1) receives user's order request;

2) judge user gradation according to user profile;

3), carry out program request control according to user gradation.

2, the control method of video request program as claimed in claim 1 is characterized in that, described step 2) in user gradation be Three Estate:

The A class user: no program request speed guarantees, could obtain video-on-demand service when the ordering server load is light;

B class user:, k kind program request speed is arranged for demand (telecommunication) service;

The C class user: for demand (telecommunication) service, the program request speed c of administration of fixed;

Wherein, the quantity of the optional program request speed of k:B class user;

The constant program request speed of c:C class user.

3, the control method of video request program as claimed in claim 2 is characterized in that, described step 3) is specially:

If a) the demand (telecommunication) service requestor is the A class user:

When a+U＜N, accept this order request; Otherwise, refuse this order request;

B) if the demand (telecommunication) service requestor is the B class user:

When U≤N, accept this order request, adopt maximum program request speed b ₁

As U＞N, U+b _kDuring≤M, accept this order request, adopt minimum program request speed b _k

C) if the demand (telecommunication) service requestor is the C class user:

When U+c≤M, accept this order request, adopt constant program request speed c;

Wherein, the quantity of the optional program request speed of k:B class user;

The program request speed of a:A class user;

b _i: B class user i possible program request speed, the scope of i is 1≤i≤k, i is more little, then b _iBig more;

Wherein, the constant program request speed of c:C class user;

The maximum outlet bandwidth that the M:VoD server is total;

The current outlet bandwidth value of having used of U:VoD server;

N: outlet bandwidth threshold value.

4, the control method of video request program as claimed in claim 2 is characterized in that, described step 3) is specially:

When the ordering server outlet bandwidth is nervous, stop all by force just in the order program service of the A of program request class user, discharge the outlet bandwidth that they take.

5, the control method of video request program as claimed in claim 4 is characterized in that, described ordering server outlet bandwidth anxiety is specially,

The current outlet bandwidth numerical value that has used of ordering server is greater than ordering server outlet bandwidth threshold value.

6, the control method of video request program as claimed in claim 2 is characterized in that, described B class user comprises,

Common B class user: when the ordering server load is light, give maximum program request speed b ₁, when ordering server load is big, is adjusted into more point and broadcasts speed b _i, b wherein _kProgram request speed minimum, b _iProgram request speed is between b ₁With b _kBetween;

Wherein, i=1,2.....k;

Privilege B class user: the authority of grabbing resource is arranged; This grade user is in request during demand (telecommunication) service, and when the ordering server outlet bandwidth is not enough, the premature termination common B grade of not served is or/and the user's of common C grade demand (telecommunication) service by force;

Described C class user comprises,

Common C class user: for demand (telecommunication) service, the program request speed c of administration of fixed;

Privilege C class user: the authority of grabbing resource is arranged; If the ordering server outlet bandwidth is not enough, the premature termination common B grade of not served is or/and the user's of common C grade demand (telecommunication) service by force.

7, the control method of video request program as claimed in claim 6 is characterized in that, described step 3) is specially:

When the ordering server outlet bandwidth is not enough, the prerogative grade user sends the order program service request, according to predetermined degradation strategy, reduce the program request speed of the B class user of program request, and/or according to the predetermined strategy of termination by force, stop common grade user demand (telecommunication) service, or refuse this order request;

When the ordering server outlet bandwidth was not enough, common grade user sent the order program service request, according to predetermined degradation strategy, reduce program request the B class user program request speed or refuse this order request.

8, the control method of video request program as claimed in claim 6 is characterized in that, described step 3) is specially:

If the demand (telecommunication) service requestor is the B class user, work as U+b _kDuring＞M, reduce, discharge enough outlet bandwidths, accept this order request and adopt minimum program request speed b just in the program request speed of the B of program request class user _k

If can't discharge enough outlet bandwidths,, then refuse this order request for common B class user;

Work as U+b _k＞M, common B class user sends order request, just in one or the program request speed of most individual B class users of program request, discharges enough outlet bandwidths by reduction, accepts this order request and adopts minimum program request speed b _kOtherwise, refuse this order request;

Work as U+b _k＞M, privilege B class user sends order request, by just reducing program request speed at one or most B class users of program request, in the time of can't discharging enough outlet bandwidths, stop one or more by force just in the common B grade of program request or the order program service of C class user, discharge enough outlet bandwidths, accept this order request and adopt minimum program request speed b _kOtherwise, refuse this order request.

9, the control method of video request program as claimed in claim 6 is characterized in that, described step 3) is specially:

As U+c＞M, common C class user sends order request, by reducing just in the program request speed of the B of program request class user, discharges enough outlet bandwidths, accepts this order request; Otherwise, in the time of can't discharging enough outlet bandwidths, refuse this order request;

As U+c＞M, privilege C class user sends order request, by just reducing program request speed at one or more B class user of program request, in the time of can't discharging enough outlet bandwidths, stop one or more by force just in the order program service of the common B or the C class user of program request, discharge enough outlet bandwidths, accept this order request; Otherwise refuse this order request.

As the control method of claim 1 or 6 or 8 described video request programs, it is characterized in that 10, described step 3) further comprises,

When certain/a little user's demand (telecommunication) services are terminated or program request speed is lowered, and notify this/a little user's demand (telecommunication) services are terminated or program request speed is lowered.

11, the control method of video request program as claimed in claim 10 is characterized in that, described step 3) further comprises,

When certain/a little user's demand (telecommunication) services are terminated or program request speed is lowered, and adjust this/a little users' charging way.

12, the control method of video request program as claimed in claim 1 is characterized in that, also comprise,

When order program service normal termination or user's active termination,, promote the user's of on-fixed program request speed program request speed if ordering server outlet bandwidth abundance promotes strategy according to predetermined speed.

13, the control method of video request program as claimed in claim 12 is characterized in that, also comprise,

After the user's of on-fixed program request speed program request speed is raised, notifies this user's program request speed to be raised, and adjust corresponding charging way.

14, the control method of video request program as claimed in claim 1 is characterized in that, also comprise,

According to the request of on-fixed program request rate users, adjust strategy according to predetermined user speed, adjust on-fixed program request rate users program request speed rank.

15, the control method of video request program as claimed in claim 14 is characterized in that, also comprise,

After the user's of on-fixed program request speed program request speed is adjusted, notifies this user's program request speed to be adjusted, and adjust corresponding charging way.

16, a kind of control device of video request program is characterized in that, comprises the policy data unit, the policy selection unit, and computing unit, admission control cell, the speed adjustment unit stops the unit by force, the charging control unit;

Described policy data unit: link to each other with described policy selection unit, be used for preserving the degradation strategy, stop strategy by force, speed promotes strategy, and user rate is adjusted strategy;

Described policy selection unit: link to each other with described admission control cell, from described policy data unit, select corresponding strategy;

Described computing unit: link to each other with described admission control cell, calculate the outlet bandwidth U value of having used;

Described admission control cell: be used to set out port band width threshold value N; Concern according to using between the total maximum outlet bandwidth M of outlet bandwidth value U and outlet bandwidth threshold value N and VoD server of described computing unit calculating, judge the order request of whether accepting the user, control described policy selection unit and select described policy data unit strategy accordingly;

Described speed adjustment unit: link to each other with described admission control cell, reduce or improve the program request speed of B class user;

The described unit that stops by force: link to each other with described admission control cell, stop the A grade, common B is or/and the order program service of C class user;

Described charging control unit: link to each other with described admission control cell, be provided with and adjust corresponding charging way.

17, a kind of video on-demand system comprises,

Central control unit: the control device with program data unit, program request processing unit, communication unit, user data cell, video request program links to each other respectively, is used for coordinating and each unit of control;

Program data unit: link to each other with central control unit, be used to preserve the data file of all programme contents of video-on-demand service;

Program request processing unit: link to each other with central control unit, be used for the programme content of program data unit is carried out processed, finish the encoding compression of video/audio;

Communication unit: link to each other with central control unit, the Media Stream that is used for and transmission request program mutual with the control of user client is to described user;

User data cell: link to each other with central control unit, be used to divide and write down custom video order program service user's user gradation and user profile;

It is characterized in that, also comprise,

The control device of video request program: link to each other with central control unit, be used for outlet bandwidth value, control described user's order request according to the server use.

18., it is characterized in that the control device of described video request program also comprises as a kind of video on-demand system as described in the claim 17,

Computing unit: calculate the outlet bandwidth U value of having used;

Admission control cell: be used to set out port band width threshold value N; Link to each other with computing unit, concern according to using between the total maximum outlet bandwidth M of outlet bandwidth value U and outlet bandwidth threshold value N and VoD server of described computing unit calculating, judge the order request of whether accepting the user, control strategy selected cell selection strategy data cell is strategy accordingly;

The policy data unit: be used for preserving the degradation strategy, stop strategy by force, speed promotes strategy, and user rate is adjusted strategy;

Policy selection unit: link to each other with admission control cell with the policy selection unit, from the policy data unit, select corresponding strategy;

Speed adjustment unit: link to each other with admission control cell, reduce or improve the program request speed of B class user;

Stop the unit by force: link to each other with admission control cell, stop the A grade, common B is or/and the order program service of C class user;

Charging control unit: link to each other with admission control cell, be provided with and adjust corresponding charging way.

19, video on-demand system as claimed in claim 18 is characterized in that, also comprise,

Administrative unit: link to each other with central control unit, be used for the registered user, nullify management and accounting management.

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