WO2009043242A1

WO2009043242A1 - Network control method and apparatus for vcr operation

Info

Publication number: WO2009043242A1
Application number: PCT/CN2008/071825
Authority: WO
Inventors: Xiao Wang
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2007-09-29
Filing date: 2008-07-30
Publication date: 2009-04-09
Also published as: CN101399725B; CN101399725A

Abstract

A network control method and apparatus of VCR operation involves that the network side controls the VCR operation of the user terminal. The method includes: obtaining the VCR operation control strategy (301); controlling the VCR operation executed by the user terminal according to the VCR operation control strategy (302). The network control method and apparatus of VCR operation can be applied to IPTV network.

Description

Network control method and device for VCR operation

The present invention relates to the field of communications technologies, and in particular, to a method and apparatus for controlling VCR operations performed on a user terminal by a network side.

Background technique

IPTV (IP Television) technology is a new technology that utilizes broadband cable television networks, computer interconnection networks, and communication networks to provide home users with a variety of interactive services, including digital television. The IPTV service is usually implemented based on the IP Multimedia Subsystem (IMS) to fully utilize the existing session control and establishment mechanisms in the IMS network to provide users with streaming media services, streaming media and real-time session services. Interactive multimedia services. The user can select a multimedia service that he or she desires to perform based on a terminal such as a normal TV plus set-top box, a computer or a mobile terminal on the user side, such as watching digital TV, and performing a series of VCR operations on the received media stream playback based on the terminal. Such as fast forward, backward, pause, positioning, normal play and other operations.

The above VCR originally refers to the old VCR (Video Cassette Recording). The VCR usually has a media playback control function, and buttons such as play, pause, fast forward, and back are set on the user. A button to perform the corresponding playback, pause, etc. These operations are called VCR operations. With the development of the three networks, the above-mentioned video playback control technology that allows the user to control the user is no longer limited to the above-mentioned VCR, and in the subsequently developed media playback control technology, such as the above IPTV technology, the user is also allowed to The playback of the media is performed such as playing, pausing, etc. Therefore, the term VCR operation is still used, and these operations are referred to as VCR operations.

Figure 1 is a schematic diagram of a draft general architecture of existing media control defined by the IETF. The IETF defines three logical entities in the architecture, including: Control Server, Control Client, and Control Channel. The session description based on the Session Initiation Protocol (SIP) between the control server and the control client The protocol (SDP) establishes a media control channel, and the control server processes the request of the client to perform a VCR operation on the media play through the media control channel, and implements the VCR operation requested by the control client.

Figure 2 is a schematic diagram of the functional architecture of an existing IMS-based IPTV service defined by ETSI TISPAN. The IPTV media function (MF, Media Function) entity may include a Media Delivery Function (MCF) and a Media Control Function (MCF) from a functional point of view; the media delivery function entity is usually some media. The server, under the control of the media control function entity, transmits the media stream required by the user to the user terminal. In the streaming media application, the user terminal establishes an RTSP control channel with the MCF through an IPTV Service Control Function (SCF) entity. Through the RTSP control channel, the MCF controls the VCR operation performed by the user on the media stream based on the request of the user terminal. The SCF controls the MCF to implement related media functions through the y2 interface with the MCF.

In the process of implementing the present invention, the inventors have found that the prior art has the following problems: Generally, the user has all the control rights for controlling the playback of the media stream, and the user sends a VCR operation request through the user terminal; accordingly, on the network side, the MCF will Receiving the VCR operation request, and implementing control broadcast of the media stream by using an RTSP control channel with the user terminal. In practical applications, the service provider sometimes does not want the user to be able to perform certain VCR operations on the media stream. If the service provider on the network side publishes a movie and expects the user to be able to view certain advertisements interspersed in the movie, the service provider does not want the user to perform a fast forward operation on the user side to play the media stream in an attempt Skip the ad. However, based on the existing media playback control technology for IPTV, the network side service controller will have difficulty controlling the user's VCR operation, and it is difficult to achieve the purpose of advertising the advertisement product. Summary of the invention

The embodiment of the invention provides a network control method for VCR operation, which enables the network side to control the VCR operation of the user terminal.

A network control method for VCR operation, including:

Obtain a VCR operation control strategy; The VCR operation control strategy is used to control the VCR operation performed by the user terminal.

The embodiment of the invention further provides a media control device, which enables the network side to control the VCR operation of the user terminal.

A media control device includes: a policy acquisition unit and an execution unit; wherein

The policy obtaining unit is configured to acquire a VCR operation control policy;

The executing unit is configured to control, by using the VCR operation control policy acquired by the policy obtaining unit, a VCR operation performed by a user terminal.

The embodiment of the present invention further provides a VCR operation policy supply device, including: a policy generation unit and a policy delivery unit;

The policy generating unit is configured to generate a VCR operation control policy for controlling a VCR operation of the user terminal according to a network side requirement;

And the policy sending unit is configured to send the VCR operation control policy generated by the policy generating unit to the media control device.

According to the foregoing technical solution provided by the embodiment of the present invention, the network-side media control device controls the VCR operation of the user terminal according to the acquired VCR operation control policy, so that the VCR of the user-side user terminal can be controlled on the network side. Operation, to meet the needs of the network side. It can effectively prevent the user side from recording the relevant media content without the permission of the service provider, and avoid the loss of the service provider.

DRAWINGS

Figure 1 is a schematic diagram of a draft general architecture of existing media control defined by the IETF;

2 is a schematic diagram of a functional architecture of an existing IMS-based IPTV service defined by ETSI TISPAN;

3 is a flowchart of a network control method for VCR operation according to an embodiment of the present invention; FIG. 4 is a schematic structural diagram of a media control device according to an embodiment of the present invention;

5 is a schematic structural diagram of a VCR operation policy supply apparatus according to an embodiment of the present invention; FIG. 6 is a flowchart of controlling a VCR operation of a user terminal according to Embodiment 1 of the present invention; 7 is a flowchart of controlling a VCR operation of a user terminal according to Embodiment 2 of the present invention; FIG. 8 is a flowchart of controlling a VCR operation of a user terminal according to Embodiment 3 of the present invention;

9 is a flowchart of controlling a VCR operation of a user terminal in Embodiment 4 of the present invention;

FIG. 10 is a flowchart of controlling a VCR operation of a user terminal according to Embodiment 5 of the present invention.

detailed description

The technical solutions provided by the embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

It is difficult for the network side to control the VCR operation issued by the user terminal because the existing media playback control technology does not consider the VCR operation of the user terminal controlled by the network side; that is, the VCR operation of the user terminal is not deployed on the network side. The policy is controlled for the MCF to execute the policy after obtaining the policy, thereby effectively controlling the VCR operation of the user terminal.

Based on the above analysis, the embodiment of the present invention can provide a network control method for VCR operation. As shown in Figure 3, the method can include the following steps:

Step 301: The MCF obtains a VCR operation control policy.

The manner in which the MCF obtains the VCR operation control policy may be: receiving the VCR operation control policy delivered by the SCF, such as receiving the SIP message or the media control message delivered by the SCF, and the SCF carrying the VCR operation control policy in the message; The VCR operation control policy is configured locally in advance.

Step 302: The MCF controls the VCR operation performed by the user terminal by using the VCR operation control policy.

In the embodiment of the present invention, the MCF may be set as an independent functional entity, or may be set on the MF together with the MDF.

Correspondingly, the embodiment of the present invention may further provide a media control device, which may be disposed in the MCF. As shown in FIG. 4, the apparatus may include: a policy acquiring unit, an execution unit, where

a policy obtaining unit 401, configured to acquire a VCR operation control policy;

The executing unit 402 is configured to control the VCR operation control policy acquired by the policy acquiring unit 401 to control the VCR operation performed by the user terminal.

The policy obtaining unit 401 can obtain the VCR by receiving the VCR operation control policy delivered by the SCF. The operation control policy, such as receiving the SIP message or the media control message that is sent by the SCF and carrying the VCR operation control policy, to obtain the VCR operation control policy; the policy acquisition unit 401 may further include: a receiving unit 4011 and a storage unit 4012, where The receiving unit 4011 is configured to receive the VCR operation control policy delivered by the SCF, and the storage unit 4012 is configured to store the VCR operation control policy received by the receiving unit.

The policy acquisition unit 401 can also obtain a VCR operation control policy through a locally pre-configured VCR operation control policy. The policy obtaining unit 401 may further include: a configuration unit 4013, configured to pre-configure the VCR operation control policy, and a storage unit 4012, configured to store the VCR operation control policy configured by the configuration unit 4013. In this case, the execution unit 402 may include: an indication receiving unit 4021 and an instruction execution unit 4022, where

The indication receiving unit 4021 is configured to receive the policy identifier corresponding to the VCR operation control policy delivered by the SCF, and the SCF requires the VCR operation control policy corresponding to the policy identifier to be applied to the indication of the specified user terminal; the SCF may pass the policy identifier and the indication SIP messages are brought to the user terminal;

The instruction execution unit 4022 is configured to control the VCR operation of the specified user terminal by using the VCR operation control policy corresponding to the policy identifier according to the indication received by the indication receiving unit 4021. The indication execution unit 4022 finds a corresponding VCR operation control policy by using the policy identifier. If the VCR operation control policy allows the user terminal to perform the VCR operation requested by the user, the MCF processes the VCR operation request requested by the user terminal, based on the RTSP control channel. The VCR operation requested by the user terminal; conversely, if the VCR operation control policy prohibits the user terminal from performing its requested VCR operation, the MCF refuses to process the request.

The embodiment of the present invention further provides a VCR operation policy supply device, and the function of the device may be a new function of the SCF. As shown in FIG. 5, the apparatus may include: a policy generating unit 501 and a policy sending unit 502;

The policy generation unit 501 is configured to generate a VCR operation control policy for controlling a VCR operation of the user terminal according to the network side requirement; the policy generation unit 501 may describe the generated VCR operation control policy by using an XML; The policy sending unit 502 is configured to send the VCR operation control policy generated by the policy generating unit 501 to a media control device, such as an MCF. The policy delivery unit 502 can bring the VCR operation control policy generated by the policy generation unit to the MCF through a SIP message or a media control message.

In the embodiment of the present invention, the VCR operation control strategy can be described in an XML language. In practical applications, the VCR operation control strategy can be described by using the XML description method listed in Table 1.

Table I:

< ?xml vers ion^ " 1 . 0 " encoding^ ¹¹ UTF- 8 " ? >

<vcr-policy xmlns = "urn: ietf: params: xml: ns: rtsp-policy ¹¹ xmlns: xsi= ¹¹ http: / / www . w3 . org/ 2001/X LSchema - instance■'>

<allow>

</ fast forward max=>

</return max=>

</pause>

</ positioning >

</allow>

</recording >

/ * rs]<allow> * /

</ forbid >

</vcr-pol icy> In the XML script example listed in Table 1 above, the VCR operation control policy allows the VCR operations performed by the user terminal to include operations such as fast forward, backward, pause, and locate; and forbid the user terminal. The VCR operations performed may include operations such as recording. In practical applications, the VCR operation that can be performed by the user terminal can be filled according to actual needs, and the VCR operation performed by the user terminal needs to be stopped.

In practical applications, the VCR operation control strategy can also be described by using the XML description method listed in Table 2.

The example shown in Table 2 gives another example of a script that uses XML to describe the VCR operational control strategy. Among them, - lists a number of commonly used VCR operations, including fast forward, backward, pause, positioning, recording, etc. For each VCR operation, "on" can be selected to allow the user terminal to perform the VCR operation, select "off" "To indicate that the user terminal is prevented from performing the VCR operation.

Table II: < ?xml vers ion^ " 1 . 0 " encoding^ " UTF- 8 " ? >

<vcr-policy xmlns = "urn: ietf: arams: xml : ns: rtsp-policy" xmlns: xsi= ¹¹ http: / / www . w3 . org/ 2001/X LSchema - instance ">

On/off //on : allow off : disable

</ fast forward >

On/off

</return>

<pause>

On/off

</pause>

On/off

</ positioning >

On/off

</recording >

</vcr-pol icy> The technical solutions in the embodiments of the present invention are described in detail below. As an example of the control strategy, in the actual application, other XML script instances may be designed to implement the VCR operation control strategy, and other VCR operations not mentioned in the embodiment of the present invention may be expanded according to actual conditions.

Embodiment 1: The VCR operation control policy is generated by the SCF, and the SCF sends the VCR operation control policy through the media control message.

As shown in FIG. 6, the method for controlling the VCR operation of the user terminal in the first embodiment of the present invention may include:

Step 601 to step 606, the user terminal desires to establish a session with the MCF, and sends an Invite message requesting to establish a session with the MCF to the SCF, where the SDP file of the Invite message gives the IP address, port number, and media description information of the user terminal. After the SCF receives the Invite message, the SCF forwards the message to the MCF. After receiving the Invite message forwarded by the SCF, the SCF confirms the confirmation interaction process with the SCF to receive the Invite message. The SCF receives the MCF return. After the 200 OK response, the confirmation interaction process of receiving the Invite message is performed with the user terminal.

In this embodiment, two processes are established between the UE and the MCF through the procedures of steps 601 to 606. Media stream, the two media streams are a video media stream and an audio media stream respectively, the tagged video media stream is the media stream 1 and the audio media stream is the media stream 2; and an RTSP control channel is established between the UE and the MCF. In practical applications, the implementation process of the VCR operation of the user terminal may be, for example, the user terminal sends a fast forward VCR operation to the MCF through the RTSP control channel. In general, the MCF receives the fast forward indication control medium in the RTSP control channel. The stream advances so that the desired VCR operation of the user terminal can be achieved. In this embodiment, the RTSP control channel is configured to control the two media streams.

The above steps 601 to 606 can be implemented based on the existing related processes, and are not described herein.

Step 607: The SCF sends a media control message to the MCF, and the VCR operation control policy generated by the SCF is carried to the MCF by using the media control message.

In the embodiment of the present invention, the SCF may generate a VCR operation control policy according to actual requirements. For example, the SCF may determine that the user's level is lower according to the user subscription information, such as an ordinary user. Therefore, the SCF may be based on the user subscription information, user level, The VCR operation control policy is generated by the user's payment situation; or the VCR operation control policy may be generated according to the requirements of the service provider, the network operator, and the like. The media control message name may be an MRequest message, and the message body of the MRequst message carries a VCR operation control policy described by the XML language.

As in the first embodiment, when the user level is low, the SCF can generate a VCR operation control policy with more restrictions on the VCR operation of the user terminal. For example, the script example of the VCR operation control policy in the first embodiment described in the XML language is listed in Table 3, which can be referenced in practical applications.

Table 3: < ?xml vers ion^ " 1 . 0 " encoding^ " UTF- 8 " ? >

<vcr-policy xmlns = "urn: ietf: arams: xml ns: rtsp-policy " xmlns: xsi= ¹¹ http: / / www . w3 . org/ 2001/X LSchema- - instance ">

On //on : allow off: prohibit

</ fast forward >

Off

</return>

<pause>

Off

</pause>

Off

</ positioning >

Off

</recording >

</vcr-pol icy> The VCR operation control strategies given in the examples shown in Table 3 include: "on" to indicate that the VCR operation that can be performed by the user terminal is only fast-forward; and "off" to indicate that the user needs to be stopped. The VCR operations performed by the terminal include back, pause, locate, and record. In addition, the VCR operation control policy corresponding to the script shown in Table 3 does not indicate the VCR operation object, that is, it does not indicate which media stream the VCR operation is allowed for, and which media stream is blocked for the VCR operation, in which case, the default is The VCR operation object is all media streams, that is, the MCF performs the fast forwarding operation of the video media stream and the audio media stream by the user terminal, but the MCF stops the user terminal from retreating, suspending, and locating the video media stream and the audio media stream.

Step 608: After receiving the MRequest message, the MCF returns an MResponse response to the SCF, and parses the MRequest message to obtain a VCR operation control policy carried therein, and may save the VCR operation control policy, and then control the user terminal according to the policy. Request for VCR operation.

For example, after the user terminal sends a request for a back operation of the video media stream, after receiving the request, the MCF searches for the saved VCR operation control policy, and determines that the user terminal's back operation is stopped. Therefore, the request is not processed. Returning the response of the failed operation; if the user terminal sends a request for a fast forward operation on the audio media stream, the MCF receives the request and searches for the saved VCR. The operation control policy determines that the fast forwarding operation of the audio media stream by the user terminal is allowed. Therefore, the fast forwarding operation of the audio media stream by the user terminal can be implemented according to the existing fast forwarding operation for the user terminal, and A response that returns a successful operation.

Step 609: The SCF sends a next MRequest message to the MCF, where the MRequest message carries a new VCR operation control policy.

In the first embodiment, the new VCR operation control policy includes: stopping the user terminal to perform a back operation on the video media stream, and stopping the user terminal from suspending the audio media stream. See Table 4, which lists examples of scripts for new VCR operational control strategies described in XML. The VCR operation control policy given by the example shown in Table 4 includes: allowing the user terminal to perform fast forward, pause, and locate operations on the media stream 1, that is, the video media stream; and stopping the user terminal from backing up and recording the media stream 1; The user terminal performs fast forward, backward, and positioning operations on the media stream 2, that is, the audio media stream, and stops the user terminal from suspending and recording the media stream 2.

Step 610: After receiving the next MRequest message, the MCF returns a MResponse response of the message to the SCF, and parses the received MRequest message to obtain a new VCR operation control policy, and overwrites the original with the new VCR operation control policy. VCR operation control strategy. After that, the VCR operation of the user terminal can be controlled according to the new VCR operation control strategy, and the process can be completed.

Table 4:

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

<rtsp-policy xmlns="urn:ietf:params:xml:ns:rtsp-policy"

Xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance'

<media mid=1 :

On //on: allow off: prohibit

</ fast forward >

Off

</return>

On

: Positioning >

On

:/Targeting >

Off

</media>

On

</ fast forward >

On

</return>

Off

: Positioning >

On

:/Targeting >

Off

</media>

</rtsp-policy> Embodiment 2: The VCR operation control policy is generated by the SCF, and the SCF sends the VCR operation control policy through the SIP message.

As shown in FIG. 7, the method for controlling the VCR operation of the user terminal in the second embodiment of the present invention may include:

Step 701: The user terminal sends an Invite message requesting to establish a session with the MCF to the SCF, where the Invite message carries information such as an IP address, a port number, and a media description information of the user terminal.

Step 702: After receiving the Invite message, the SCF adds the generated VCR operation control policy. After the Invite message is entered, the Invite message carrying the VCR operation control policy is sent to the MCF. The flow of the steps 703 to 706 is similar to the flow of the above steps 603 to 606, and details are not described herein.

It should be added that after receiving the Invite message sent by the SCF, the MCF parses out the VCR operation control policy, stores the VCR operation control policy, and then uses the RTSP between the user terminal based on the VCR operation control policy. The control channel controls the VCR operation of the user terminal for each media stream.

In the second embodiment, two media streams are also established between the user terminal and the MCF, which are a video media stream and an audio media stream, and the MCF utilizes an RTSP control channel between the user terminal and the MCF, and an SCF. The VCR operation control policy carried in the Invite message controls the two media streams, that is, the VCR operation for controlling the playback of the two media streams by the user terminal. In practical applications, only one media stream may be established between the user terminal and the MCF, or a plurality of media streams may be established, and the MCF controls one or more of the ones by using one or more RTSP control channels. Media streams. The embodiment of the present invention merely enumerates a situation that may occur, that is, the MCF controls two media streams by using one RTSP control channel, and other situations are similarly not described herein.

Step 707 to step 708, the SCF sends a new VCR operation control policy to the MCF through the Info message; after receiving the new VCR operation control policy, the MCF stores the new VCR operation control policy, and then operates based on the new VCR. The control strategy controls the VCR operation initiated by the user terminal through the RTSP control channel.

For example, the related examples in the first embodiment are not described here.

In the embodiment of the present invention, in the case that the SCF brings the VCR operation control policy to the MCF through the SIP message, the SIP message may be the above Invite message, Info message or other SIP message.

In addition, in the actual application, when the SCF needs to update the VCR operation control policy, the VCR operation control policy may be issued in the same or different manner as the previous time, and the VCR operation control policy on the MCF is updated. For example, when the SCF establishes a session between the user terminal and the MCF, the SCF is sent to the MCF. The Invite message is sent to the MCF by the VCR operation control policy. After the session between the user terminal and the MCF is successfully established, the SCF can use the media control message to bring the new VCR operation control policy to the MCF. That is to say, in practical applications, the corresponding VCR operation control strategy can be used as needed, which is no longer listed in this paper.

Embodiment 3: The VCR operation control policy is generated by the SCF, and the SCF uses the SDP in the SIP message to bring the VCR operation control policy to the MCF.

The VCR operation control policy of the third embodiment is not specifically a control policy for each VCR operation, but a usage policy of the RTSP control channel for the user terminal.

Only when the RTSP control channel is activated, the MCF can use the RTSP control channel to implement the request of the allowed user terminal's VCR operation. When the RTSP control channel is deactivated, the MCF will not process any relevant VCR of the user terminal. Request for operation. Therefore, in the third embodiment, the VCR operation of the user terminal can be controlled by controlling the activation and activation of the RTSP control channel. In the third embodiment, the VCR operation control policy may include: activating an RTSP control channel between the user terminal and the MCF; or deactivating the RTSP control channel.

For the case where the MCF controls the playing of multiple media streams by using one RTSP control channel, in the actual use process, the RTSP control channel may be used to control the playing of one or several media streams in the plurality of media streams. For this case, the VCR operation control policy may be set to: allow the specified media stream to be associated with the RTSP control channel; and the association of the other specified media stream with the RTSP control channel to associate the other specified media stream with the RTSP control channel. The playback of the media stream associated with the RTSP control channel can be controlled by the RTSP control channel, and the playback of the media stream associated with the RTSP control channel will not be controlled by the RTSP control channel. In addition, as long as there is no logical conflict, a VCR operation control policy may specify that a media stream is associated with the RTSP control channel, while specifying other media streams to be associated with the RTSP control channel.

As shown in FIG. 8, the method for controlling the VCR operation of the user terminal in the third embodiment of the present invention may include:

The flow of steps 801 to 806 can be similar to the flow of steps 601 to 606 described above. In the third embodiment, an RTSP control channel controls two media streams between the user terminal and the MCF, a video media stream and an audio media stream, that is, media stream 1 and media stream 2 as shown in FIG.

Step 807 to step 809, the SCF and the MCF perform SIP SDP interaction, and the VCR operation control policy is brought to the MCF by using the SDP in the Invite message body. After receiving the Invite message, the MCF receives the Invite message from the SCF. Confirm the interaction process.

Referring to Table 5, Table 5 lists the script examples of the VCR operation control strategy in the third embodiment described in the XML language. By setting the RTSP control channel to the deactivated state, the user terminal is prevented from performing VCR operations on the two media streams. . In addition, the deactivation setting for the RTSP control channel in this example is to set the RTSP control channel's property to "inactive". In practical applications, the attribute parameter value "recvonly" of the existing RTSP control channel can also be used to set the attribute of the RTSP control channel to deactivate. The above "recvonly" means that only the user terminal is allowed to receive the media stream. The value of the RTSP control channel attribute parameter compared with the "recvonly" is "sendrecv", which means that the user terminal is allowed to receive the media stream, and the user terminal is allowed to send information, and the information that is allowed to be sent includes the user terminal can send The request for the VCR operation on the media stream is requested. Therefore, if the attribute of the RTSP control channel is set to "recvonly" or "inactive", in the third embodiment, the user terminal is prohibited from transmitting the VCR operation request to the network side. In other words, the VCR operation of the media stream by the user terminal is stopped.

After receiving the Invite message, the MCF can parse out the VCR operation control policy and perform corresponding deactivation processing. Thereafter, if a request from the user terminal to perform a VCR operation on the media stream 1 or 2 is received, the request is rejected.

Table 5: INVITE sip MCF . example . com SIP/2

Via : ...

Route ...

Max- Forwards ...

From : ...

To : ...

Cal l - ID : ...

CSeq : ...

v=

o=SCF 20000000 20000001 IN IP4 sc f . example . com

s =

c=IN IP4 uehost . example . com

t =

m=audio 30000 RTP/AVP 0 8 97 / * mediastream 1 */

a=rtpmap : 8 PCMA/8000

a=label 1

m=video 30100 RTP/AVP 31 32 / * mediastream 2 * /

a=rtpmap : 31 H26 l/ 9

a=label 2

m=application 9 TCP/RTSP rtsp

a=f mtp rtsp version 2 . 0

a=rtspid m- stream : 1 , 2

a=inactive /* In this example, RTSP is set to deactivate, that is, disable RTSP or use a=recvonly. */

Step 810 to step 812: The SCF sends a next Invite message to the MCF, where the Invite message carries a new VCR operation control policy. The new VCR operation control policy is also described by the SDP in the Invite message; after receiving the Invite message, the MCF performs an acknowledgment interaction process with the SCF to receive the Invite message, and the process can be ended.

In the third embodiment, the VCR operation control policy described in the SDP of the next Invite message sent by the SCF to the MCF requires that the media stream 1, that is, the video media stream, be associated with the RTSP control channel. Referring to Table 6, Table 6 lists a script example of another VCR operation control policy in the third embodiment described in the XML language, wherein two media streams originally controlled by the RTSP control channel are configured to be configured by the RTSP. The control channel controls a media stream, and according to the identifier of the media stream, the media stream 2 is controlled by the RTSP control channel, that is, the audio media stream, and the media stream 1 originally controlled by the RTSP control channel is deleted, thereby stopping the user. The terminal performs a VCR operation on the media stream 1.

After the MCF receives the request of the user terminal to perform the VCR operation on the media stream 1, the request is rejected; if the user terminal requests the VCR operation on the media stream 2, the MCF can still follow the currently stored user terminal. The VCR operation control policy for media stream 2 processes the request. INVITE si : MCF . example . com SIP/2.0

Via: ...

Route: ...

Max- Forwards: ...

From: ...

To: ...

Call-ID: ...

CSeq: ...

V=0

o=SCF 20000000 20000002 IN IP4 scf . example . com

s =

c=IN IP4 uehost . example . com

t = 0 0

m=audio 30000 RTP/AVP 0 8 97 /* mediastream 1 */ a=rtpmap: 8 PCMA/8000

a=label: 1

m=video 30100 RTP/AVP 31 32 /* mediastream 2 */

a=rtpmap: 31 H261/90000

a=label: 2

m=application 9 TCP/RTSP rtsp

a=f mt : rtsp version: 2.0

a=:rtspid m-stream:fiber 2 /* deletes 1 in m-stream, Wt mediastream

2 association with RTSP */

a=sendrecv /* a=send:recv activates RTSP */ In the above-mentioned Embodiments 1 to 3, the SCF may not directly carry the VCR operation control policy to be delivered to the MCF through a SIP message or a media control message. The location of the VCR operation control policy is sent to the MCF through a SIP message or a media control message. After receiving the message, the MCF can obtain the VCR operation from the corresponding location according to the location information of the VCR operation control policy carried in the message. Control Strategy.

Embodiment 4: The VCR operation control policy is generated by the SCF, and the SCF sends a VCR operation control policy to the MCF by sending a control command to the MCF. Control commands can be carried by SIP messages or media control messages sent by the SCF to the MCF.

As shown in FIG. 9, a method for controlling a VCR operation of a user terminal according to Embodiment 4 of the present invention, wherein the user terminal has established two sessions and an RTSP control channel with the MCF through the SCF. The method can include:

Step 901: The SCF sends an MRequest message to the MCF, where the message carries a VCR operation control policy, that is, a control command, for instructing the MCF to control the user terminal to the media stream 1.

The VCR operation control policy may be to prevent the user terminal from performing a fast forward operation on the media stream 1. Step 902: After receiving the MRequest message, the MCF returns a MResponse response to the SCF. In this embodiment, the MCF parses the control command in the MRequest message, and according to the control command, the request for the fast forward operation of the media stream 1 by the received user terminal is rejected.

Step 903: The SCF sends a next MRequest message to the MCF, where the message carries a VCR operation control policy, that is, a control command, for instructing the MCF to control the user terminal to the media stream 2.

The VCR operation control policy may be to prevent the user terminal from performing a back operation on the media stream 2. Step 904: After receiving the MRequest message, the MCF returns a MResponse response to the SCF, and the process may end.

In this embodiment, the MCF parses the control command in the MRequest message, and according to the control command, the request for the received user terminal to request the backoff operation of the media stream 2 will reject the request.

Embodiment 5: The VCR operation control policy is pre-configured on the MCF.

In this case, the pre-configured VCR operation control policy may be a policy for a streaming media service of a certain user terminal, or may be a VCR operation control policy applicable to all user terminals. When there is only one pre-configured VCR operation control policy, the policy may not need to be identified. When the pre-configured VCR operation control policy is more than one, each VCR operation control policy needs to be assigned a respective identifier, and the identification information needs to be provided to the SCF.

As shown in FIG. 10, the method for controlling the VCR operation of the user terminal in Embodiment 5 of the present invention may include:

Step 1001: Configure multiple VCR operation control policies on the MCF, and assign a policy identifier that can uniquely identify the VCR operation control policy for each VCR operation control policy.

The flow of steps 1002 to 1007 is similar to the flow of the above steps 601 to 606. An RTSP control channel is established between the user terminal and the MCF, and a media session exists between the user terminal and the MCF.

It should be noted that after the SCF receives the Invite message that the user terminal establishes a session with the MCF, the SCF instructs the MCF to control the VCR operation of the user terminal, and the policy identifier corresponding to the VCR operation control policy corresponding to the user terminal, Populated into the Invite message, and in the The Invite message carries an indication applied to the user terminal of the VCR operation control policy corresponding to the policy identifier, and sends an Invite message carrying the policy identifier and the indication to the MCF. After receiving the Invite message, the MCF parses the policy identifier. And indicating, according to the policy identifier, finding a corresponding VCR operation control policy, and using the VCR operation control policy as a VCR operation control policy corresponding to the user terminal. In addition, the SCF may carry the policy identifier in a SIP message sent by the user terminal, such as an Accept-Contact or Contact header field of the Invite message, and the policy identifier may be pgroup=mctrll.

Step 1008: The user terminal sends a request to perform a VCR operation request, and after receiving the request, the MCF finds a VCR operation control policy corresponding to the user terminal. When the policy allows the user terminal to perform the VCR operation requested by the user, the MCF processes the request. The VCR operation requested by the user terminal is implemented based on the RTSP control channel; when the VCR operation control policy stops the user terminal from performing its requested VCR operation, the MCF refuses to process the VCR operation request.

Step 1009 to step 1010, the SCF sends a next SIP message, such as an Invite message, an Info message, or an Update message, to the MCF, and sends the policy identifier corresponding to the new VCR operation control policy applied to the user terminal to the MCF; After the SIP message, the device returns a 200 OK response to the SCF, and parses the policy identifier carried in the received SIP message, such as pgroup=mctrl2, to update the VCR operation control policy applicable to the user terminal, and the process may end.

In practical applications, the VCR operation control strategy pre-configured on the MCF and the VCR operation control strategy issued by the SCF can be combined to enable the MCF to obtain the required VCR operation control strategy.

In addition, the embodiment of the present invention also enumerates some examples of VCR operation control strategies that may be commonly used in XML description as follows, which can be used for practical application:

Referring to Table VII, Table 7 lists the VCR operation control policies for stopping the recording of media streams by the user terminal. Table 7: <?xml version^ "1.0" encoding^ ¹¹ UTF- 8 "?>

<vcr-policy xmlns= "urn: ietf: arams: xml: ns: rtsp-policy xmlns: xsi= ¹¹ http: / / www. w3. org/ 2001/X LSchema - instance■'>

</recording >

</ forbid >

</vcr-policy> See Table VIII. Table 8 lists another way to describe the XML of Table VII.

Table 8:

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

<vcr-policy xmlns = "urn: ietf: params: xml: ns: rtsp-policy ¹¹ xmlns : xsi= ¹¹ htt : 11 www. w3. org/ 2001/XMLSchema - instance■'>

On //on: 3⁄4i noon off: ^ih

</ fast forward >

On

</return>

<pause>

On

</pause>

On

</ positioning >

Off

</recording >

</vcr-policy> See Table IX. Table 9 lists the VCR operation control policies that allow user terminals to fast forward media streams. Table 9:

<?xml version^ "1.0" encoding^ ¹¹ UTF - 8 "?>

<vcr-policy xmlns = "urn: ietf: params: xml: ns: rtsp-policy ¹¹ xmlns: xsi= ¹¹ http: / / www. w3. org/ 2001/XMLSchema - instance■'>

<allow>

</ fast into max=l>

</ allow >

</vcr-policy> In summary, in the technical solution of the VCR operation network control method, the media control device, and the VCR operation policy supply device provided by the embodiment of the present invention, the network side media control device operates according to the acquired VCR. Control strategy to control the VCR operation of the user terminal, The VCR operation of the user side user terminal can be controlled on the network side to meet the requirements of the network side. It can effectively prevent the user side from recording the relevant media content without the permission of the service provider, and avoid the loss of the service provider. In addition, the technical solutions provided by the embodiments of the present invention are applicable to various communication system structures.

A person skilled in the art can understand that all or part of the steps of implementing the above embodiments can be completed by a program to instruct related hardware, and the program can be stored in a computer readable storage medium, such as ROM/RAM, magnetic. Disc or CD.

The above is only a specific embodiment of the present invention, but the scope of protection of the embodiments of the present invention is not limited thereto, and any person skilled in the art can easily think of it within the technical scope disclosed by the present invention. Variations or substitutions are intended to be covered by the scope of the invention. Therefore, the scope of protection of the embodiments of the present invention should be determined by the scope of protection of the claims.

Claims

Claim

A network control method for VCR operation, comprising:

Obtain a VCR operation control strategy;

The VCR operation control strategy is used to control the VCR operation performed by the user terminal.

2. The network control method for VCR operation according to claim 1, wherein the VCR operation policy is generated by a service control function SCF.

3. The network control method for VCR operation according to claim 2, wherein the step of acquiring a VCR operation control policy comprises:

Receiving the VCR operation control policy delivered by the SCF.

The network control method for VCR operation according to claim 3, wherein the VCR operation control policy comprises: allowing a user terminal to perform some or all operations in a VCR operation; or: stopping the user terminal from executing the VCR Operation or all operations.

The network control method for VCR operation according to claim 3 or 4, wherein the VCR operation control policy is carried by the SCF through a SIP message; or carried by the SCF through a media control message; The SCF is carried by a control command.

The network control method for VCR operation according to claim 3 or 4, wherein the step of acquiring the VCR operation control policy comprises:

Receiving a message sent by the SCF that carries the location of the VCR operation control policy;

Obtaining the VCR operation control policy from the network location;

The message includes: a SIP message, or a media control message.

7. The network control method for VCR operation according to claim 3, wherein the VCR operation control policy comprises any one of the following:

Activating an RTSP control channel between the user terminal and the MCF;

Deactivating the RTSP control channel;

Allowing a specified media stream to be associated with the RTSP control channel;

The association of the specified media stream with the RTSP control channel is suppressed.

8. The network control method for VCR operation according to claim 7, wherein the step of acquiring a VCR operation control policy comprises:

And receiving the SIP message delivered by the SCF, where the SDP of the SIP message carries the VCR operation control policy.

9. The network control method for VCR operation according to claim 1, wherein the step of acquiring a VCR operation control policy comprises:

The VCR operation control policy is pre-configured.

The network control method for VCR operation according to claim 9, wherein the step of controlling the user terminal to perform the VCR operation by using the VCR operation control policy comprises:

Receiving, by the SCF, a policy identifier corresponding to the VCR operation control policy, and the SCF requesting, by using the VCR operation control policy corresponding to the policy identifier, an indication of the specified user terminal; The policy identifies a corresponding VCR operation control policy, and controls the VCR operation of the specified user terminal.

The network control method of the VCR operation according to claim 10, wherein the policy identifier is carried by a Request-URI delivered by the SCF, or carried by a header field of a SIP message delivered by the SCF. .

12. A media control device, comprising: a policy acquisition unit and an execution unit; wherein

The execution unit is configured to control the VCR operation control policy obtained by the policy acquisition unit to control a VCR operation performed by the user terminal.

The media control device according to claim 12, wherein the policy acquisition unit comprises:

a receiving unit and a storage unit, wherein

The receiving unit is configured to receive the VCR operation control policy delivered by the SCF;

The storage unit is configured to store the VCR operation control policy received by the receiving unit.

a configuration unit, configured to pre-configure the VCR operation control policy;

And a storage unit, configured to store the VCR operation control policy configured by the configuration unit.

The media control device according to claim 14, wherein the execution unit comprises: an indication receiving unit, an instruction execution unit, wherein

The indication receiving unit is configured to receive a policy identifier that is sent by the SCF and that is corresponding to the VCR operation control policy, and the SCF needs to apply an indication that the VCR operation control policy corresponding to the policy identifier is applied to the specified user terminal;

And the indication execution unit is configured to control the VCR operation of the specified user terminal by using a VCR operation control policy corresponding to the policy identifier according to the indication received by the indication receiving unit.

A VCR operation policy supply device, comprising: a policy generation unit and a policy delivery unit; wherein

The policy issuing unit is configured to send the VCR operation control policy generated by the policy generating unit to the media control device.