WO2010045796A1

WO2010045796A1 - Control method, device and system for video-on-demand service

Info

Publication number: WO2010045796A1
Application number: PCT/CN2009/072167
Authority: WO
Inventors: 黄灵芝; 李幼颖; 和晓艳; 王丰
Original assignee: 华为技术有限公司
Priority date: 2008-10-25
Filing date: 2009-06-08
Publication date: 2010-04-29
Also published as: CN101404753A

Abstract

The embodiments of the invent propose a control method, device and system for video-on-demand service, and can implement the control for the media operation request based on the control policy for video-on-demand service, which concretely include: the control policy for video-on-demand service is obtained; the obtained control policy is sent to the control implementation unit, so as to make the control implementation unit implement the control for video-on-demand service based on the control policy. The embodiments of the invent can implement the control for the media operation request based on the control policy for video-on-demand service, and so can effectively control the operation to the media.

Description

Method, device and system for controlling on-demand service This application claims to be Chinese patent issued on October 25, 2008, with the application number of 200810216974.8, the Chinese patent entitled "Control method, device and system for on-demand service" Priority of the application, the entire contents of which are incorporated herein by reference.

Technical field

The present invention relates to the field of communications, and in particular, to a method, an apparatus, and a system for controlling an on-demand service.

Background technique

IPTV (Internet Protocol Television) is a TV broadcast service based on IP protocol. It is a display terminal based on IP network transmission using television or personal computer. It provides digital TV, video service, information service and interaction to users. Technology for a variety of broadband services such as entertainment and e-commerce. Digital audio and video streaming services are the core business of IPTV. The way in which streaming media is transferred in the system varies with the way users receive it. IMS based IPTV is an IPTV service provided by TISPAN (Telecommunications and Internet Convergence Service and Advanced Network Protocol) under the overall architecture of IP Multimedia Subsystem (IMS) to fully utilize the existing registration and authentication in the IMS network. Mechanisms such as routing, session control and establishment, service triggering, charging, and end-to-end QoS (Quality of Service) guarantee to provide users with streaming services and multimedia services that integrate streaming media and real-time session services. From the perspective of the end user, there are two main ways of receiving broadcast and broadcast. The video-on-demand (VOD), also called the COD service, is a unicast distribution method transmitted by the network side to the user equipment, and during the viewing process, the user side is allowed to initiate fast forwarding at any time. Rewind, pause, etc. VCR (Video Cassette Recorder, VCR now refers to a video clip) operation.

Therefore, when the user views the program content preset by the program provider, such as an advertisement, the advertisement content in the program can be skipped by a control command such as "fast forward"; The donor does not want to allow it. Because the advertisements distributed together with the program content often bear the cost of the program itself to a certain extent, if all the users who watch the game can arbitrarily skip, it will inevitably weaken the meaning of the advertisement; and may even lead to the exit of the advertiser. Disguised increases the cost of on-demand. Of course, it is not limited to advertising content. For media content that the program provider does not want to operate arbitrarily, there is a problem that it may be arbitrarily operated.

Summary of the invention

The embodiment of the invention provides a method, a device and a system for controlling the on-demand service, which can control the media operation request according to the control policy of the on-demand service.

A method for controlling an on-demand service provided by an embodiment of the present invention includes:

Obtain control strategies for on-demand services;

And transmitting the acquired control policy to the control implementation unit, so that the control implementation unit performs control of the on-demand service according to the control policy.

The control strategy unit of the on-demand service provided by the embodiment of the present invention includes an obtaining module and a sending module:

The obtaining module is configured to acquire a control strategy of the on-demand service;

The sending module is configured to send the acquired control policy to the control implementation unit, so that the control implementation unit performs the control of the on-demand service according to the control policy.

A system for on-demand service provided by an embodiment of the present invention includes a control policy unit and a control implementation unit:

The control policy unit is configured to obtain a control policy of the on-demand service and send the obtained control policy to the control implementation unit;

The control implementation unit is configured to perform control of the on-demand service according to the control policy.

The method, device and system for controlling the on-demand service provided by the embodiment of the present invention control the media operation request according to the control policy of the on-demand service, thereby effectively controlling the operation on the media. 1 is a schematic diagram of a method for controlling an on-demand service according to an embodiment of the present invention;

2 is a flowchart of a method for controlling an on-demand service according to another embodiment of the present invention;

3 is a flowchart of a method for controlling an on-demand service according to another embodiment of the present invention;

4 is a flowchart of a method for controlling an on-demand service according to another embodiment of the present invention;

FIG. 5 is a flowchart of a method for controlling an on-demand service according to another embodiment of the present invention; FIG.

6 is a flowchart of a method for controlling an on-demand service according to another embodiment of the present invention;

7 is a flowchart of a method for controlling an on-demand service according to another embodiment of the present invention;

8 is a schematic structural diagram of a control system control unit of an on-demand service in an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of an apparatus for an on-demand service according to an embodiment of the present invention.

detailed description

The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

As shown in FIG. 1 , an embodiment of the present invention provides a method for controlling an on-demand service, which specifically includes: Step 101: Acquire a control policy of an on-demand service;

Specifically, the server that stores the on-demand service control policy is queried according to the information carried in the received user request, and the control policy of the on-demand service is obtained.

A user request can be a business request (such as an on-demand request) or a media operation request (such as fast forward and rewind).

The control policy of the on-demand service may be one or more of the start time, the end time, the duration, the resource identifier, the encoding format, and the location information of the on-demand service media stream to be controlled.

Step 102: Send the acquired control policy to the control implementation unit, so that the control implementation unit performs control of the on-demand service according to the control policy.

The sending in step 102 may be a transmission between two entities, or a logical concept transmission between different virtual modules of the same entity.

The obtained control policy may be specifically sent to the control implementation unit through a message body or an extended header field of a Session Initiation Protocol (SIP); or the acquired control The policy may be sent to the control implementation unit through a message body or an extended header field of a Real Time Streaming Protocol (RTSP).

An example of carrying it through the RTSP extended header field.

To carry through the RTSP extended header field, you need to extend the feature-tag as follows:

Paly. skip: Support of skip operation for media playback by using Range header. Applies only for servers.

Play. scale. range: Support of scale operations for media playback only in the time range presented in the Range header. Applies only for servers in PLAY, PAUSE , SETUP, REDIRECT, and PLAY NOTIFY response.

Play. skip. range: Support of skip operations for media playback only in the time range presented in the Range header. Applies only for servers in PLAY, PAUSE , SETUP, REDIRECT, and PLAY NOTIFY response.

An example of the application of the above extension:

Unsupport: play.scale.range,play.skip.range

Range: npt=0-0: 10:34.10

It indicates that fast forward is not allowed in the range of npt=0-0: 10:34.10, that is, the user's media operation request is not allowed.

The message body of SIP or RTSP may specifically be a Session Description Protocol (SDP) or an XML (Extensible Markup Language) message body; when it is an SDP message body, the attribute line of the SDP may be extended. Carry the acquired control strategy and send it to the control implementation unit.

An example of extending the SDP attribute line is as follows:

a=unsupport: <feature tag>[/< npt-range>][/< utc-range>][/< smpte-range>]

Where npt-range = ( npt-time "-" [ npt-time ] ) | ( "-" npt- time )

Npt-time = "now" | npt- sec | npt-hhmmss

Npt- sec = 1 *DIGIT [ "." *DIGIT ]

Npt-hhmmss = npt-hh ":" npt-mm ":" npt-ss [ "." *DIGIT ]

Npt-hh = 1*DIGIT ; any positive number

Npt-mm = 1 *2DIGIT ; 0-59

Npt-ss = 1 DIGIT ; 0-59 Utc-range = "clock""=" utc-time "-" [ utc-time ]

Utc-time = utc-date "T" utc-time "Z"

Utc-date = 8DIGIT; < YYYYMMDD >

Utc-time = 6DIGIT [ "." fraction ]; < HHMMSS. fraction >

Smpte-range = smpte-type "=" smpte-time "-" [ smpte-time ]

Smpte-type = "smpte" | "smpte-30-drop" | "smpte-25"; other timecodes may be added

Smpte-time = 2DIGIT ":" 1*2DIGIT ":" 1*2DIGIT [ ":" 1 *2DIGIT ] [ "."

1 *2DIGIT ]

Among them, npt-range, utc-range > smpte-range refer to RFC2326 3.6, 3.7, section 3.5 definition, Feature tag has an extended definition of play.scale in RTSP2.0, ie double speed fast forward; play.skip is needed The extended Feature tag, which means that the Range request is carried in the Play request.

An example of the application of the above extension:

a=unsupported:play.scale/ npt=0-0 :10:34.10

a=unsupported:play.skip/ npt=0-0: 10:34.10

The above combination indicates that fast forward is not allowed in the range of npt=0-0:10:34.10, that is, the user's media operation request is not allowed.

When the XML message body of the SIP or RTSP carries the acquired control policy and sends it to the control implementation unit, the XML format can be as shown in the following example, but is not limited to this:

<?xml version="1.0" encoding="UTF-8"?>

<xs: schema xmlns:xs="http .//-www. w3.org/2001/XMLSchema"

targetNamespace="urn:xxx:xml:ns:iptvpushserviceactiondata"

elementFormDefault="qualified" attributeFormDefault="unqualified">

<xs: element name="IPTVADControlData">

<xs:complexType>

<xs:sequence>

<xs: element name="Controlcontent" type="xs: anyURI"/>

<xs: element name="StartTime" type="xs:time" minOccurs="0"/>

<xs: element name="Duration" type="xs:unsignedlnt"

minOccurs="0"/> <xs: element name="OffTime"type="xs:time"/>

<xs: element name="Indicator" type="xs: string"/>

<xs: element

</xs:element>

</xs:sequence>

</xs:complexType>

</xs:element>

</xs:schema>

And controlling, by the control implementation unit, the on-demand service according to the control policy, specifically: determining, according to the control policy, whether the media operation request is allowed; or determining whether to negotiate the media control channel according to the control policy.

When it is determined that the media operation request is not to be executed according to the control policy, the control of the control implementation unit to perform the on-demand service includes:

Receiving a media operation request;

The media operation request is rejected or ignored according to the control policy.

When it is determined that the media control channel is not negotiated according to the control policy, the control of the control implementation unit to perform the on-demand service includes:

Set the media control channel port to 0 to not negotiate the media control channel.

The control implementation unit further includes saving the received control policy before performing the control of the on-demand service according to the control policy.

FIG. 2 is a flowchart of a method for controlling an on-demand service according to another embodiment of the present invention. In this embodiment, the service control function (SCF) is used as the control policy unit, and the user equipment (User Equipment, UE) is the control implementation unit, and the SCF uses the SIP message to send the control policy of the on-demand service to the UE, and The media stream that needs to be controlled is an example of an advertisement.

In this example, the Media Function (MF) is a combination of the Media Control Function (MCF) and the Media Delivery Function (MDF). To streamline the process, consider the ads that need to be controlled and the programs that are on demand. Located in the same MF; the principle of the method is also true for scenes with on-demand programs and advertising media located in different MFs.

201. The UE establishes a media channel through negotiation by requesting a service request.

202. The SCF receives the request for the on-demand service (the session requested by the service is required to be sent to the MF, but the SCF can be triggered to obtain the control policy after passing the SCF), and the control policy of the on-demand service is obtained according to the information carried in the request for the on-demand service. Specifically, the index SCF obtains the control policy of the on-demand service by using one or more of the on-demand content identifier, the user identity, the location information of the on-demand content, or the operation indication of the on-demand content carried in the on-demand service request (in this case, the SCF is used as the storage). The server of the on-demand service control policy may be one or more of a start time, an end time, a duration, a resource identifier, and an encoding format of the on-demand service media stream to be controlled. Among them, there is no successive relationship between establishing media channels and obtaining control strategies (such as advertising parameters, etc.) in agreement with media content;

203. The SCF sends the control policy obtained by the SCF to the UE side, which may be, but is not limited to, the control strategy obtained by using SIP Info, SIP Message, SIP Subscribe/Notify, and SIP 200 OK Response. The control policy can be carried by XML or SDP, or by extending the header field.

The following takes the control message obtained by using the XML message in the Info message as an example, indicating that the advertisement does not allow fast forwarding during the time period of npt=0: 10:34.10-0:12:34.10.

INFO sip: user-a@iptv.com SIP/2.0

From: <sip: cod-scf@iptv.com >;tag=31415

To: <sip: user@iptv.com >

Content-Type: application/xml

Content-Length: 127

<?xml version:" 1.0" encoding= "UTF-8 "? >

<IPTVADControl> < Controlcontent >sip: CODContent 1 @iptv. com</ Controlcontent >

< StartTime>0 : 10:34.10</StartTime >

<VCRControl>play.scale</VCRControl>

</IPTVADControl> Take the Info message with the SDP carrying the acquired control policy as an example (the extension of SDP can be as shown in Embodiment 1), indicating that the npt=0:10:34.10-0:12:34.10 time period in the on-demand program Ads are not allowed to fast forward.

INFO sip: user-a@iptv.com SIP/2.0

From: <sip: cod-scf@iptv.com >;tag=31415

To: <sip: user@iptv.com >

Content-Type: application/sdp

Content-Length: 127

V=0

o=- 2880844256 2880842807 IN IP4 192.0.2.5 a= unsupported: play . scale/ npt=0 : 10:34.10-0: 12:34.10

a=unsupported:play. skip/ npt=0 : 10:34.10-0: 12:34.10

204. The UE saves the received media control policy.

205. The UE returns a response to the Info information. 200 OK.

206. The UE starts to watch the program content.

207. When the user issues a fast forward media operation request, the UE determines, according to the acquired media control policy, whether the fast forward will cross the advertisement in the program, and the UE has the capability of restricting the user from improperly fast forwarding. If the fast forward will cross the advertisement in the program, or is currently in the advertising range, the UE rejects or ignores the user's media operation request. As shown in FIG. 3, it is a flowchart of a method for controlling an on-demand service according to another embodiment of the present invention. In this embodiment, MCF or SCF is used as the control strategy unit, and MCF is the control implementation unit. When the SCF is used as the control policy unit, the SCF uses the SIP message to send the control policy of the on-demand service to the MCF, and uses the media stream to be controlled as an advertisement as an example.

In this example, the Media Function (MF) is the media control function (Media).

Control Function (MCF) is a combination of Media Transfer Function (MDF). In order to simplify the process, the advertisements to be controlled and the programs to be broadcast are considered to be located in the same MF; the principle of the method is also true for the scenes of the on-demand programs and the advertisement media located in different MFs.

301. The UE establishes a media channel by negotiating a service request by using an on-demand service;

302A. The SCF receives the request for the on-demand service, and acquires a control policy of the on-demand service according to the information carried in the request for the on-demand service. Specifically, the index SCF itself obtains the control policy of the on-demand service by using one or more of the on-demand content identifier, the user identity, the location information of the on-demand content, or the operation instruction of the on-demand content carried in the on-demand service request (in this case, the SCF acts as The server that controls the on-demand service control policy may be one or more of a start time, an end time, a duration, a resource identifier, and an encoding format of the on-demand service media stream to be controlled;

303A, the SCF selects an appropriate MCF according to the ID of the on-demand content, and sends the control policy of the index acquisition to the MCF, which may be, but is not limited to, the control obtained by using SIP Info, SIP Message, SIP Subscribe/Notify, SIP 200 OK Response, etc. Strategy. The control policy can be carried in the manner of the XML or the SDP, or the extended header field, as shown in the second embodiment.

The SCF can directly forward the on-demand service request of the UE, and adopts a control policy that is obtained by using SIP Info, SIP Message, SIP Subscribe/Notify, and SIP 200 OK Response; or the SCF can use the SIP Reinvite to request the on-demand service request of the UE. Carrying the acquired control strategy; 304, MCF saves the obtained media control strategy;

305a\305b, MCF returns response 200 OK;

306. The UE starts to watch the program content.

307. When the user issues a fast forward media operation request, the MCF determines, according to the acquired media control policy, whether the fast forward will cross the advertisement in the program. If the fast forward will cross the advertisement in the program, or is currently in the advertising range, the MCF rejects or ignores the user's media operation request.

If the MCF is used as the control strategy unit, the above steps 302A and 303A are changed to:

302B: The SCF selects an appropriate MCF according to the ID of the on-demand content, and forwards the UE's on-demand service request to the MCF;

303B. The MCF receives the request for the on-demand service, and acquires a control policy of the on-demand service according to the information carried in the request for the on-demand service. Specifically, the MCF obtains the control policy of the on-demand service by using one or more of the on-demand content identifier, the user identity, the location information of the on-demand content, or the operation indication of the on-demand content carried in the on-demand service request (in this case, the MCF is used as the storage) The server of the on-demand service control policy is obtained from the server that stores the traffic control policy. The control policy of the on-demand service may be the start time, the end time, the duration, the resource identifier, and the coding of the on-demand service media stream to be controlled. One or more of the formats. It is then sent by the control policy unit located inside the MCF to the control implementation unit located inside the MCF, at which point the transmission belongs to the logical concept transmission between different virtual modules of the same entity.

The rest of the steps are the same.

As shown in FIG. 4, it is a flowchart of a method for controlling an on-demand service according to another embodiment of the present invention. In this embodiment, the MCF or SCF is used as the control policy unit, and the UE is the control implementation unit. When the SCF is used as the control policy unit, the SCF uses the control policy of the SIP message to send the on-demand service to the MCF. The MCF uses the SIP or RTSP message to send the control policy of the on-demand service to the UE, and the media stream to be controlled is used as an example.

In this example, the media function (Media Function, MF) is the media control function (Media). Control Function (MCF) is a combination of Media Transfer Function (MDF). In order to simplify the process, the figure considers the advertisements to be controlled and the programs to be broadcast are located in the same MF; the principle of the method is also true for the scenes of the on-demand programs and the advertisement media located in different MFs.

401. The UE establishes a media channel by using the on-demand service request negotiation and the media content.

The SCF receives the request for the on-demand service, and obtains the control policy of the on-demand service according to the information carried in the request for the on-demand service. Specifically, the index SCF itself obtains the control policy of the on-demand service by using one or more of the on-demand content identifier, the user identity, the location information of the on-demand content, or the operation instruction of the on-demand content carried in the on-demand service request (in this case, the SCF acts as The server that controls the on-demand service control policy may be one or more of a start time, an end time, a duration, a resource identifier, and an encoding format of the on-demand service media stream to be controlled;

403A, the SCF selects an appropriate MCF according to the ID of the on-demand content, and sends the control policy of the index to the MCF, which may be, but is not limited to, using SIP Info, SIP Message, SIP Subscribe/Notify, SIP 200 OK Response, etc. Control Strategy. The control policy may be carried in the manner of the XML or the SDP, or the extended header field, as shown in the second embodiment.

The SCF can forward the UE's on-demand service request directly, and use the SIP Info, SIP Message, SIP Subscribe/Notify, SIP 200 OK Response, etc. to obtain the obtained control policy. The SCF can also use the SIP Reinvite request to forward the UE's on-demand service request. Carrying the acquired control strategy;

404. The MCF saves the obtained media control policy.

405a\405b, MCF returns response 200 OK;

406. The UE starts to watch the program content.

407. The UE initiates an RTSP DESCRIBE request, and the request may be, but is not limited to, an RTSP.

Requests such as DESCRIBE, RTSP SETUP, or RTSP PLAY; 408. The MCF returns an RTSP 200 OK, where the media control policy is carried, in this example, an advertisement parameter;

When carrying the RTSP extended SDP attribute line, the example is as follows:

RTSP/2.0 200 OK

CSeq: 1

Server: PhonyServer/1.0

Date: 23 Jan 1997 15:35:06 GMT

Content- Type: application/sdp

Content-Length: 257

Content-Base: rtsp :// example. com/twister .3 gp/

Expires: 24 Jan 1997 15:35:06 GMT

o=- 2880844256 2880842807 IN IP4 192.0.2.5

s=RTSP Session

i=An Example of RTSP Session Usage

E=adm@example.com

a= unsupported :play . scale/ npt=0 : 10:34.10-0: 12:34.10

a=unsupported:play.skip/ npt=0: 10:34.10-0: 12:34.10

t=0 0

m=audio 0 RTP/AVP 0

When carrying the RTSP extended header field, the example is as follows:

RTSP/2.0 200 OK

CSeq: 1

Server: PhonyServer/1 0

Date: 23 Jan 1997 15:35:06 GMT

Unsupport: play. scale.range,play. skip. range

Range: npt=0-0: 10:34.10

Session: 47112344; timeout=60

Transport: RTP/AVP; unicast; dest_addr=":4588"/":4589";

Src_addr="192.0.2.241 :6256"/" 192.0.2.241 :6257";

Ssrc=2A3F93ED It is indicated that fast forward is not allowed in Range of 0-0:10:34.10.

409. When the user issues a fast forward media operation request, the UE determines, according to the acquired media control policy, whether the fast forward will cross the advertisement in the program. If the fast forward will cross the advertisement in the program, or is currently in the advertising range, the UE rejects or ignores the user's media operation request.

Of course, in step 405, the media control policy may be carried to the UE by extending the attribute line of the SDP, and the 408 step does not need to be carried.

As shown in FIG. 5, it is a flowchart of a method for controlling an on-demand service according to another embodiment of the present invention. In this embodiment, the MCF is used as the control implementation unit. The main difference from the previous embodiment is that the principle of triggering the acquisition control policy is different: the previous embodiment triggers the MCF acquisition control policy to be triggered when receiving the service request established by the media channel, and the fifth embodiment is to receive the media operation request, such as fast forward. Triggered when.

In order to simplify the process, the figure considers the advertisements to be controlled and the programs to be broadcast are located in the same MF; the principle of the method is the same for the on-demand programs and the scenes in which the advertisement media are located in different MFs.

501. The UE establishes a media channel by negotiating a service request and negotiating with the media content;

502. The MDF sends the streaming media;

503. The UE starts to watch the program content.

504. The user issues a fast forward media operation request, such as RTSP Play;

505. After receiving the fast forward media operation request, the MCF acquires a control policy of the on-demand service according to the information carried in the media operation request. Specifically, the MCF obtains the control policy of the on-demand service by using one or more of the on-demand content identifier, the user identity, the location information of the on-demand content, or the operation instruction of the on-demand content carried in the media operation request; or may be MCF and The MDF interacts with the MDF as a server for storing the on-demand service control policy, and obtains the control policy of the on-demand service. The SCF can also obtain the control policy of the on-demand service according to the information carried in the service request, and the MCF interacts with the SCF to obtain the control of the on-demand service. Strategy; of course, the MCF can interact with other independent control policy storage servers to obtain the control strategy of the on-demand service. See the description of the previous embodiment for the method. The control policy of the on-demand service may be one or more of the start time, the end time, the duration, the resource identifier, and the encoding format of the on-demand service media stream to be controlled.

The MCF then determines, based on the acquired media control policy, whether the fast forward will cross the advertisement or other important information in the program. If the fast forward will cross the advertisement or other important information in the program, or is currently in the scope of an advertisement or other important information, the MCF rejects or ignores the user's media operation request. The error response may also carry a control policy to the UE side. The specific message can be as shown in the following example:

RTSP/2.0 403 Forbidden

CSeq: 1

Date: 23 Jan 1997 15:35:06 GMT

Unsupport: play. scale.range,play. skip. range

Range: npt=0-0: 10:34.10

Session: 47112344; timeout=60 As shown in FIG. 6, it is a flowchart of a method for controlling an on-demand service according to another embodiment of the present invention. In this embodiment, the advertisements to be controlled and the programs to be broadcast are different media streams, and may even be located on different servers. To simplify the process, the control functions and transmission functions of the advertising media to be controlled are located in the AD Server as an example. The negotiation of the media stream to be controlled in this embodiment is initiated by the UE side, and the control channel is not negotiated.

601. The UE establishes a media channel by using an on-demand service request negotiation with a media server that provides the program, and then receives the media stream to view the program content.

602. The network side acquires a control policy of the on-demand service according to the information carried in the service request. The network element of the network instance may be an SCF and/or an MCF. Specifically, the MCF may be a server that stores an on-demand service control policy, and the index obtains a control policy of the on-demand service. The MCF may also interact with the MDF, and the MDF functions as a storage-on-demand service control policy. The server, the MDF obtains the control strategy of the on-demand service from the MCF; or may be the SCF as the server for storing the on-demand service control policy, The control strategy of the on-demand service is obtained; the control strategy of the on-demand service is obtained by the SCF, and the MCF interacts with the SCF to obtain the control strategy of the on-demand service; of course, the MCF or the SCF can interact with other independent servers to obtain the control of the on-demand service. Strategy. For a specific acquisition method, refer to the description of the previous embodiment. The control policy of the on-demand service may be one or more of the start time, the end time, the duration, the resource identifier, the encoding format, and the location information of the on-demand service media stream to be controlled;

603. The network side sends the obtained control policy of the on-demand service to the UE side. Corresponding to the description of step 602, the network element of the control policy of the on-demand service that is obtained by the network side may be an MCF or an SCF. An example is given in the drawing by MCF. The control strategy can be obtained by using, for example, SIP Info, SIP Message, SIP Subscribe/Notify, and SIP 200 OK Response. The control policy of the on-demand service obtained by the network side may also be carried in the process of negotiating and establishing a media channel with the media server (media content) providing the program, for example, by using a SIP response message. The advertisement parameter may be carried in an XML or SDP description, or an extended header field, as shown in the second embodiment. The advertisement parameter that is delivered needs to include an advertisement identifier of the advertisement medium.

604a\604b\604c, the UE triggers a pause command for the on-demand content according to the acquired control policy of the on-demand service, that is, the advertisement information, and pauses the media stream of the on-demand program content.

For example, the specific start time of the advertisement in the control strategy may be reached, and the UE needs to suspend the program media stream that was originally viewed;

605. The UE re-initiates the on-demand service request negotiation, and the SIP Reinvite increases the negotiation of the advertisement media stream, where the request may carry the advertisement identifier.

606. The SCF forwards the on-demand service request to negotiate the SIP Reinv e, and sets the media control channel port to 0 according to the advertisement identifier carried in the request, and only negotiates the media delivery channel;

Or the SCF does not have the control policy of the on-demand service, the SCF forwards the request to the MCF, and only the media delivery channel and the control channel that does not negotiate the advertisement are completed by the MCF, and the MCF sets the media control channel port to 0 according to the advertisement identifier carried in the request. Negotiate media delivery channels. In practical applications, the AD Server can also be used as the MCF to complete this function, or it can be a dedicated MCF. Or the UE is used as the control implementation unit. Before the step 605, the control policy unit (MCF or SCF) sends the obtained control policy to the UE. Then, in step 605, when the UE initiates the Reinvite, the advertisement media stream is not negotiated. The control channel, then 606 kinds of SCF can forward the request according to the normal flow.

607a\607b, the UE receives the advertisement media information. During the time when the user issues a fast forward media operation request, the UE determines whether the fast forward will cross the advertisement in the program according to the obtained media control policy. If the fast forward will cross the advertisement in the program, or is currently in the advertising range, the UE rejects or ignores the user's media operation request. Because the control command is only for on-demand content, it is invalid for the advertising media;

608a\608b\608c, the UE perceives the end time of the advertisement according to the acquired advertisement parameter information, and initiates an RTSP PLAY to replay the original on-demand program.

FIG. 7 is a flowchart of a method for controlling an on-demand service according to another embodiment of the present invention. The negotiation of the media stream to be controlled in this embodiment is initiated by the SCF side, and the control channel is not negotiated.

701. The UE establishes a media channel by using an on-demand service request negotiation and a media server (media content) that provides the program, and then receives the media stream to view the program content of the on-demand program;

702. The network side acquires a control policy of the on-demand service according to the information carried in the service request. The network element of the network instance may be an SCF and/or an MCF. Specifically, the MCF may be a server that stores an on-demand service control policy, and the index obtains a control policy of the on-demand service. The MCF may also interact with the MDF, and the MDF functions as a storage-on-demand service control policy. The server obtains the control strategy of the on-demand service; or the SCF is used as the server for storing the on-demand service control policy, and the index obtains the control strategy of the on-demand service; or the SCF has acquired the control policy of the on-demand service, and the MCF interacts with the SCF to obtain the on-demand The control strategy of the service; of course, the MCF or SCF can also interact with other independent servers to obtain the control strategy of the on-demand service. See the description of the previous embodiment for the specific acquisition method. The control policy of the on-demand service may specifically be one or more of the start time, the end time, the duration, the resource identifier, the encoding format, and the location information of the on-demand service media stream to be controlled, that is, the control policy of the on-demand service specifically includes the advertisement. Media parameter information;

703a\703b, MCF triggers a pause command for on-demand content according to the advertisement information, and pauses the point Broadcasting the media stream of the program content; 702 and 703 steps have no temporal relationship;

704a. If the SCF is the control implementation unit, the SCF initiates a media channel requesting negotiation between the user and the advertising MCF, which does not include the media control channel;

705. The advertisement MCF returns the negotiated advertisement media parameter information in the response, and establishes a transmission channel of the advertisement medium. The AD Server of Figure 7 includes the above-mentioned advertising MCF.

If the advertisement MCF is used as the control enforcement unit, the above steps 704a and 705 are changed to: 704b, the SCF initiates a request to negotiate a media channel for the advertisement between the user and the advertisement MCF. The delivery channel of the consultation media will also negotiate the media control channel;

705. The entity that obtains the control policy sends the control policy to the advertisement MCF, and the advertisement MCF returns the negotiated advertisement media parameter information, and sets the media control channel port to 0 according to the control policy, and only negotiates the media delivery channel.

706. The user views the advertisement content, and the media control command cannot be executed during the advertisement;

707a\707b\707c Trigger the playback of the original program according to the end time in the control policy, restore the on-demand program media, and the user continues to watch.

Similarly, the UE acts as a control implementation unit, and the steps are similar.

As shown in FIG. 8, the embodiment of the present invention further provides a system for on-demand services, including a control policy unit 801 and a control implementation unit 802:

The control policy unit can also be used to select an appropriate control implementation unit based on the information of the on-demand content.

In a specific application, the control policy unit 801 may be a media control function MCF or a service control function SCF; the control implementation unit 802 may be a media control function MCF, a service control function SCF or a user terminal UE.

The control policy unit and the control enforcement unit can be located within the same entity. For example, MCF It can be used as a control strategy unit and as a control implementation unit.

As shown in FIG. 9, the embodiment of the present invention further provides a control policy unit of an on-demand service, which specifically includes an obtaining module 8011 and a sending module 8012:

The obtaining module 8011 is configured to acquire a control policy of the on-demand service;

The server that stores the on-demand service control policy may be the control policy unit itself or a separately deployed server.

The sending module 8012 is configured to send the acquired control policy to the control implementation unit, so that the control implementation unit performs the control of the on-demand service according to the control policy.

The obtained control policy may be specifically sent to the control implementation unit through a message body or an extended header field of the Session Initiation Protocol SIP or the Real-Time Streaming Protocol RTSP.

The carrying of the RTSP extended header field can be as shown in the first embodiment.

The message body of the SIP or RTSP may be a session description protocol SDP or an XML message body. When it is an SDP message body, the acquired control policy may be carried by the extended SDP attribute line and sent to the control implementation unit.

The attribute line of the extended SDP can be as shown in the first embodiment.

When the XML message body of the SIP or RTSP carries the acquired control policy and sends it to the control implementation unit, the XML format can be as shown in the first embodiment.

The control policy unit also includes a selection module for selecting an appropriate control enforcement unit based on the information of the on-demand content.

In a specific application, the control policy unit may be a media control function MCF or a service control function. Will SCF.

The embodiment of the present invention further provides a control implementation unit for the on-demand service, which specifically includes a receiving module 8021 and a control implementation module 8022:

The receiving module 8021 is configured to receive a control policy of the on-demand service sent by the control policy unit. The control implementation module 8022 is configured to perform the control of the on-demand service according to the control policy, and specifically includes:

Determining whether to permit the media operation request according to the control policy; or determining whether to negotiate the media control channel according to the control policy.

Determining, according to the control policy, that the media operation request is not executed specifically includes:

Receiving a media operation request;

Determining, according to the control policy, that the media control channel is not negotiated specifically includes:

The control implementation unit further includes a storage module configured to save the received control policy prior to performing control of the on-demand service according to the control policy.

In a specific application, the control implementation unit may be a media control function MCF, a service control function SCF or a user terminal UE.

Through the embodiment of the present invention, the control of the media operation request is performed according to the control policy of the on-demand service, so that the operation on the media can be effectively controlled. For example, for advertisements or other important information that do not want users to fast forward, the user can effectively control the fast forward operation of the advertisement media.

One of ordinary skill in the art will appreciate that all or part of the steps in implementing the above-described embodiments may be accomplished by a program instructing the associated hardware, which may be stored in a computer readable storage medium. The above-mentioned storage medium may be a read only memory, a magnetic disk or an optical disk or the like.

Obviously, those skilled in the art can make various modifications and variations to the present invention without departing from the invention. The spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of the inventions

Claims

Claim

A method for controlling an on-demand service, characterized in that the method comprises:

Obtain control strategies for on-demand services;

And sending the acquired control policy to the control implementation unit, so that the control implementation unit performs control of the on-demand service according to the control policy.

2. The method according to claim 1, wherein the controlling policy for acquiring the on-demand service specifically includes:

Receiving a user request, and acquiring a control policy of the on-demand service according to the information carried in the received user request.

3. The method of claim 2, wherein the user request is a service request or a media operation request.

The method according to claim 2, wherein the controlling policy for acquiring the on-demand service according to the information carried in the received user request specifically includes:

The server that stores the on-demand service control policy is queried according to the information carried in the received user request, and the control policy of the on-demand service is obtained.

The method according to claim 1, wherein the acquired control policy is sent to the control implementation unit through a message body or an extended header field of the session initiation protocol SIP; or the acquired control policy is implemented by the real-time streaming protocol RTSP. The message body or extended header field is sent to the control implementation unit.

The method according to claim 1, wherein the controlling the execution unit to perform the control of the on-demand service according to the control policy comprises: determining, according to the control policy, whether the media operation request is allowed; The media operation request receives a media operation request, and rejects or ignores the media operation request according to the control policy.

The method according to claim 1, wherein the controlling the execution unit to perform the control of the on-demand service according to the control policy comprises: determining, according to the control policy, whether to negotiate the media control channel, according to the If the control policy determines that the media control channel is not negotiated, the media control channel port is set to 0 to not negotiate the media control channel.

The method according to claim 1, wherein the control implementation unit further comprises saving the received control policy before performing the control of the on-demand service according to the control policy.

The method of claim 2, wherein the information carried in the user request comprises at least one of the following: an on-demand content identifier, a user identity identifier, location information of the on-demand content, and an operation indication of the on-demand content.

The method according to claim 1, wherein the control policy of the on-demand service includes at least one of the following: start time, end time, duration, resource identifier, and encoding of the on-demand service media stream to be controlled. Format, location information.

A control strategy unit for an on-demand service, wherein the control policy unit comprises an acquisition module and a transmission module:

An obtaining module, configured to acquire a control strategy of an on-demand service;

And a sending module, configured to send the acquired control policy to the control implementation unit, so that the control implementation unit performs control of the on-demand service according to the control policy.

The unit according to claim 11, wherein the control policy unit further comprises a selection module, configured to select a suitable control implementation unit according to the information of the on-demand content.

13. A control implementation unit for an on-demand service, wherein the control implementation unit comprises a receiving module and a control implementation module:

a receiving module, configured to receive a control strategy of the on-demand service;

And a control implementation module, configured to perform on-demand service control according to the control policy.

The unit according to claim 13, wherein the controlling the execution unit to perform the control of the on-demand service according to the control policy comprises: determining whether to allow the media operation request according to the control policy; The media operation request receives a media operation request, and rejects or ignores the media operation request according to the control policy.

The unit according to claim 14, wherein the controlling the execution unit to perform the control of the on-demand service according to the control policy comprises: determining, according to the control policy, whether to negotiate the media control channel, according to the If the control strategy judges that the media control channel is not negotiated, then the media is set. The body control channel port is 0 to not negotiate the media control channel.

16. A system for on-demand service, characterized in that the system comprises a control strategy unit and a control implementation unit:

a control policy unit, configured to acquire a control policy of the on-demand service and send the acquired control policy to the control implementation unit;

And a control implementation unit, configured to perform control of the on-demand service according to the control policy.

The system according to claim 16, wherein the control policy unit is specifically a media control function MCF or a service control function SCF.

The system according to claim 16 or 17, wherein the control implementation unit is specifically a media control function MCF, a service control function SCF or a user terminal UE.

The system according to claim 16, wherein the control policy unit is further configured to select the control implementation unit based on information of the on-demand content.