WO2010096966A1

WO2010096966A1 - Method for switching channel, terminal equipment and channel switching server

Info

Publication number: WO2010096966A1
Application number: PCT/CN2009/070578
Authority: WO
Inventors: 邸佩云; 邹子轩; 刘欣; 许阳坡; 胡昌启
Original assignee: 华为技术有限公司
Priority date: 2009-02-27
Filing date: 2009-02-27
Publication date: 2010-09-02
Also published as: CN102356615A

Abstract

A method for switching channel is disclosed in the embodiments of the present invention, which includes the steps of: sending a switching request message to a channel switching server to make the channel switching server to stop or continue sending data stream of a current channel according to the switching request message, and make the channel switching server to send data stream of a new channel, wherein the switching request message at least includes channel information on the new channel and channel process information. The terminal equipment and the channel switching server are disclosed in the embodiments of the present invention, they can shorten information interactivity time and information processing time during the process of channel switching, so increase the speed of channel switching.

Description

Channel switching method, terminal device and channel switching server

The embodiments of the present invention relate to the field of communications technologies, and in particular, to a channel switching method, a terminal device, and a channel switching server. Background technique

QoE evaluates the quality of a service from the perspective of common user experience. In IPTV service, the speed of channel switching is an important indicator that affects QoE. The channel switching time is from the user to issue a channel switching command to the user to watch the new. The time of the channel. After the user sends a channel switching instruction to the client device, the STB sends a channel switching request to the server providing the channel switching service, and after receiving the user's request, the server responds to the user's request and proceeds to the unicast form. The user provides the service of the new channel. After the user accesses the unicast for a period of time, the multicast server provides the user with the service of the channel. During the period from the time when the client device issues a channel switching request command to the time when the client device receives the information of the new channel, the client device and the server providing the channel switching service need to perform some information interaction, and the interaction of the information takes a certain time. In order to complete, and because the IP network itself has packet loss, there will be data damage during the interaction and data transmission between the client device and the server providing the channel switching service.

In order to shorten the time of channel switching and ensure the quality of channel switching, in the prior art, the client first sends a fast channel switching request to the server, and after receiving the request, the server sends the channel description information to the server in the form of unicast, and then (or ) Send load description information and load information of the data stream. After a period of time, the client sends an IGMP request to the multicast server to request to join the multicast group. The multicast group sends the multicast stream of the channel to the client. After the client receives the multicast stream, the client receives the multicast stream. The serial number information of the first RTP packet is sent to the channel switching unicast server, and the server determines whether to stop the transmission of the unicast stream according to the serial number information of the first RTP packet of the received multicast stream.

In the process of implementing the present invention, the inventor has found that the prior art has at least the following disadvantages: If the user issues a channel switching instruction again, the client separately sends the request message leaving the unicast and requests the new channel request message, that is, the client. The terminal needs to interact with the server twice, which increases the bandwidth of the uplink. The client and the server must process two packets continuously. If the client needs to issue multiple channel switching requests, the server needs to perform with the client. Multiple interactions require more bandwidth, and the time interval between two messages affects the speed of fast channel switching.

Summary of the invention

The embodiment of the invention provides a channel switching method, a terminal device and a channel switching server to improve the speed of channel switching.

According to an aspect of the present invention, a method for switching a channel is provided, including:

Transmitting a handover request message to the channel switching server, so that the channel switching server stops or continues to send the data stream of the current channel according to the handover request message, and causes the channel switching server to send a data stream of the new channel, where The handover request message includes at least channel information of the new channel and processing information of the channel.

According to another aspect of the present invention, a method for switching a channel is also provided, including:

Receiving a handover request message sent by the terminal device;

Parsing the handover request message, obtaining at least channel information of the new channel and processing information of the channel; stopping or continuing to send the data stream of the channel to the terminal device according to the processing information of the channel, and transmitting according to the channel information of the new channel The data of the new channel flows to the terminal device.

According to another aspect of the present invention, a terminal device is further provided, including: a behavior detecting module, configured to detect whether the switching channel information of the user is received;

a switching processing module, configured to: when the behavior detecting module detects the switching channel information of the user, send a switching request message to the channel switching server, so that the channel switching server stops or continues to send the current according to the switching request message. a data stream of the channel, and causing the channel switching server to send a data stream of the new channel, wherein the handover request message includes at least channel information of the new channel and processing information of the channel. .

According to another aspect of the present invention, a channel switching server is further provided, including:

a message processing module, configured to receive a handover request message sent by the terminal device, and parse the handover request message, to obtain at least channel information of the new channel and processing information of the channel;

And a sending module, configured to stop or continue to send the data stream of the channel to the terminal device according to the processing information of the channel, and send the data stream of the new channel to the terminal device according to the channel information of the new channel.

Transmitting the switching request message including the channel information of the new channel and the processing information of the current channel to the channel switching server to notify the channel switching server to stop or continue to transmit the current channel by using the switching method of the channel provided above, the terminal device, and the channel switching server. The data stream is sent to the terminal device, and the new channel data stream is sent to the terminal device, which can shorten the information interaction time and the information processing time in the channel switching process, and improve the channel switching speed.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any inventive labor. 1 is a schematic diagram of an application environment of a terminal device applied to channel switching according to an embodiment of the present invention; FIG. 2 is a schematic structural diagram of a terminal device and a channel switching server applied to channel switching according to Embodiment 1 of the present invention;

3 is a schematic structural diagram of a terminal device and a channel switching server applied to channel switching according to Embodiment 2 of the present invention;

4 is a schematic structural diagram of a terminal device and a channel switching server applied to channel switching according to Embodiment 3 of the present invention;

FIG. 5 is a flowchart of a method for switching a channel according to Embodiment 1 of the present invention; FIG.

6 is a flowchart of a method for switching a channel according to Embodiment 2 of the present invention;

FIG. 7 is a flowchart of a method for switching a channel according to Embodiment 3 of the present invention.

detailed description

BRIEF DESCRIPTION OF THE DRAWINGS The technical solutions in the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative work are within the scope of the present invention.

FIG. 1 is an application environment diagram of a terminal device applied to channel switching according to an embodiment of the present invention. In this embodiment, the multicast server 10 is connected to the channel switching server 20 and the terminal device 30, and the channel switching server 20 is configured to send the unicast data stream of the switched channel to the channel switching request of the terminal device 30. Terminal device 30. The multicast server 10 is configured to receive the request for joining the multicast group sent by the terminal device 30 after receiving the unicast data stream sent by the channel switching server 20 for a period of time, and send the multicast data stream to the terminal device 30, The multicast data stream is sent to the channel switching server 20 for storage. In this embodiment, the terminal device 30 can be a set top box. FIG. 2 is a schematic structural diagram of a terminal device and a channel switching server applied to channel switching according to Embodiment 1 of the present invention. In the present embodiment, the terminal device 30 receives the unicast data stream transmitted by the channel server 20. The channel switching server 20 includes a channel switching data storage module 200, a media key information acquiring module 210, a sending module 220, and a message processing module 230. The terminal device 30 includes a data receiving module 300, a data stream monitoring module 310, a switching processing module 320, and a behavior detecting module 330.

In this embodiment, the data receiving module 300 is configured to receive a multicast data stream and/or a unicast data stream that satisfies a user playing channel. In this embodiment, after the terminal device 30 switches channels, the unicast data stream sent by the channel switching server 20 is received first, and after receiving the unicast data stream for a period of time, the multicast data stream sent by the multicast server 10 is received. At this time, the unicast data stream is still received, mainly to synchronize the data streams of the same channel sent by the switching channel server 20 and the multicast server 10, and after a period of time, that is, after the synchronization is reached, the channel switching server 20 After the unicast data stream of the channel is suspended, the terminal device 30 receives the multicast data stream sent by the multicast server 10, but the channel switching server 20 still sends some data about other services or services of the channel, for example, when When there is an erroneous data stream in the multicast data stream of the channel transmitted by the multicast server 10, the channel switching server 20 can be notified to resend part of the data stream related to the channel.

The data flow monitoring module 310 is configured to monitor the data received in the data receiving module 300, that is, whether the data stream received by the monitoring data receiving module 300 is a unicast data stream or a multicast data stream, and data of the received data stream. Rate and so on. In the present embodiment, the data stream monitoring module 310 detects that the unicast data stream is received in the data receiving module 300.

In this embodiment, when the user needs to switch the current channel, a message for switching channels is generated. In this embodiment, the current channel of the user may be one or multiple channels. There are several cases of switching channel information: If the current channel is one, the user can stop the current channel, or To retain the current channel, add one or more channels to be played, and then add one or more new channels. If the current channel is multiple, the user can stop the current multiple channels. One or more, also retain one or more of the current multiple channels, or you can add one or more channels to play.

In this embodiment, the behavior detecting module 330 is configured to detect whether user-generated switching channel information is received. The switching processing module 320 is configured to: when the behavior detecting module 330 detects the switching channel information generated by the user, acquire a plurality of channel information from the data receiving module 300 according to the switching channel information, and send a switching request message to the channel switching server 20, so as to enable the The channel switching server 20 stops or continues to transmit the data stream of the current channel, and causes the channel switching server 20 to transmit the data stream of the new channel. In this embodiment, the handover processing module 320 sends a handover request to the channel switching server, and the handover request message includes at least channel information of the new channel and processing information of the channel.

In this embodiment, when the current channel is one, if the current channel is stopped, the handover request message includes channel information of the new channel and processing information of the channel, and the processing information of the channel includes stopping the transmission of the data stream of the current channel. If the current channel is stopped and one or more channels to be played are added, the switching request message includes channel information of the new channel and processing information of the channel, and the processing information of the channel includes stopping the transmission of the data stream of the current channel. Information, adding one or more channels to be played, also as a new channel; if one or more channels to be played are added when the current channel is reserved, the switch request message includes the channel information of the new channel and The processing information of the channel, the processing information of the channel includes information for retaining the data stream of the current channel, in this case, the channel switching server 20 defaults to add one or more to be played when receiving the channel information of the new channel. Channel.

In this embodiment, when there are multiple current channels, if one or more of the current channels are stopped, one or more of the current multiple channels are reserved, and the handover request message includes the frequency of the current channel. Channel information, channel information of the new channel, and processing information of the channel, the processing information of the channel includes information of the data stream of the stop channel, or information of the data stream of the reserved channel, and the switching request message may also include channel information of the current channel. The channel information of the new channel and the processing information of the channel, the processing information of the channel includes the information of the data stream of the stop channel and the information of the data stream for starting the new channel, or the information of the data stream of the reserved channel and the data for starting the new channel. Streaming information; if one or more of the current channels are stopped, one or more of the current plurality of channels are reserved, and one or more channels to be played are added, the switching request message includes channel information of the current channel The channel information of the new channel and the processing information of the channel, the processing information of the channel includes information of the data stream of the stop channel, or information of the data stream of the reserved channel, and the switching request message may also include channel information of the current channel, new Channel information of the channel and processing information of the channel, the processing information of the channel includes stopping the channel According to the data flow information and start a new information channel data stream information, or leave the channel data stream and start a new channel of information flow.

In this embodiment, the channel information includes an identification of a channel (SSRC). In this embodiment, the switching processing module 320 is further configured to send a handover request message to the channel switching server 20 according to the data received in the data receiving module 300 detected by the data flow monitoring module 310.

That is, the handover request message includes channel information of the new channel and the processing information of the channel, the channel information includes an identifier of the channel, and the processing information of the channel includes information for stopping the transmission of the data stream of the current channel, the channel information including the channel Logo.

The data receiving module 300 is further configured to receive a data stream of a new channel sent by the channel switching server. When the switching request message includes the channel information of the new channel and the processing information of the channel, where the channel information includes the identifier of the channel, and the processing information of the channel includes the information of the data stream that retains the current channel, the data receiving module 300 Also used to continue receiving the channel switching server 20 to send The data stream of the current channel is received and the data stream of the new channel transmitted by the channel switching server 20 is received. When the handover request message includes channel information of a current channel, channel information of a new channel, and processing information of a channel, the processing information of the channel includes information of stopping a data stream of the channel, or retaining information of a data stream of the channel, or The handover request message includes channel information of a current channel, channel information of a new channel, and processing information of a channel, and the processing information of the channel includes information of a data stream of the stop channel and information of a data stream for starting a new channel, or a reserved channel. The data receiving module 300 is further configured to continue to receive the data stream of the current channel that needs to be reserved sent by the channel switching server 20, and receive the channel switching, when the information of the data stream is started and the information of the data stream of the new channel is started. The data stream of the new channel sent by the server 20.

In this embodiment, the handover request message may be represented by a different message format, which is described below:

First, the handover request message can be represented by the following message format: I header: |

I user: ID |

I media source ID | where user ID is used to indicate the ID of the current user, and media source ID is the channel information of the new channel. If the media source ID field in the current packet has a data value, it indicates that the current channel needs to be stopped. And start a new channel, which is equivalent to carrying the channel information of the new channel, the processing information of the current channel and the new channel.

Second, the handover request message can be represented by the following message format: +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- +-+-+-+-+-+-+-+ I header |

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- +-+-+-+-+-+-+-+

I user ID |

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- +-+-+-+-+-+-+-+

I media source ID ( current ) |

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- +-+-+-+-+-+-+-+

I media source ID ( new ) |

+-+ -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- +-+-+-+-+-+-+-+

The media source ID (current) indicates the channel information of the stop channel in the current channel, and the media source ID (new) indicates the channel information of the new channel. When there is a data value in the field of the media source ID (current), it indicates that the channel needs to be stopped. The current channel, when there is a data value in the field of the media source ID (new), indicates that the new channel is activated, that is, the message carries the channel information of the new channel, the processing information of the current channel and the new channel. In this embodiment, the RTCP packet is described as follows:

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- +-+-+-+-+-+-+-+

I rtcp header |

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- +-+-+-+-+-+-+-+

I Extens ions |

+-+ -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- +-+-+-+-+-+-+-+

In the above RTCP message, the rtcp header is the rfc4585 message format, and the extensions field is an extension field. The rtcp header can be expressed in the following format:

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- +-+-+-+-+-+-+-+

I V=2 I P I FMT I PT | l e ngt h |

I S S RC o f packet s e nde r |

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- +-+-+-+-+-+-+-+

I S S RC o f me di a s o u rce |

+-+-+-+-+-+-+-+-+-+-+-+-+ -+- +-+ -+- +-+ -+- +-+ -+- +-+ - +- +-+ -+- +-+ -+- + where SSRC of packet sender indicates the sender of the current message, that is, the identifier of the terminal device 30, compared with the first or second type of message. The field corresponds to the use ID field in the first or second type of message; the SSRC of media source indicates the channel information of the new channel, and the SSRC of media source field corresponds to the media source ID field in the first type of message. Or include the media source ID (current) or media source ID (new) field in the second packet, SSRC is ―

Synchronization source, P sync source, .

In this embodiment, the description is still made in the RTCP packet, and the RTCP packet has several cases, which are respectively described below:

The first type of RTCP message:

1

+ -+- + -+- ■+- ■+- +- ■+- ■+- ■+-+-+- ■ + one + one + one + one + one + one + one + one + one + one +一+一₊ _ ■+- ■+- ■+- ■+- ■+- ■+- ■+- ■+

1 SSRC of media source ( cuuuen ) 1

1 SSRC of media source ( new) 1

1 Extens ions 1

+ -+- + -+- ■+- ■+- +- ■+- ■+- ■+-+-+- ■ + one + one + one + one + one + one + one + one + one + one +一+一+一■+- ■+- ■+- ■+- ■+- ■+- ■+- ■+ where SSRC of media source (current) indicates the channel information of the stop channel in the current channel, SSRC of Media source (new) indicates the channel information of the new channel. When there is a data value in the SSRC of media source (current) field, it means that the current channel needs to be stopped. When there is a data value in the SSRC of media source (new) field, It means that the new channel is activated, which means that the message carries the channel information of the new channel, the processing information of the current channel and the new channel.

Or

SSRC of media source (current) indicates the channel information of the reserved channel in the current channel, and SSRC of media source (new) indicates the channel information of the new channel. When there is a data value in the SSRC of media source (current) field, it indicates that it needs to be reserved. The current channel, when there is a data value in the SSRC of media source (new) field, indicates that the new channel is activated, that is, the message carries the channel information of the new channel and the processing information of the current channel and the new channel. The second type of RTCP packet: +- +- +- +- +- +- +- +- +- +-+-+-■ + one + one + one + one + one + one + one + one + one + one + one + one + One +- +- +- +- +- +-■+-■+ 1 SSRC of packet sender: 1

+- +- +- +- +- +- +- +- +- +-+-+- ■ + one + one + one + one + one + one + one + one + one + one + one + one + One +- +- +- +- +- +- ■+- ■+

1 SSRC of media source ( new) 1

1 SSRC of media source ( cuuuen ) 1

1 Extens ions 1

+- +- +- +- +- +- +- +- +- +-+-+- +- +- +- +- +- +- ■+- ■+

Where SSRC of media source (current) field and SSRC of media source (new)

+

The order of the fields can be interchanged.

The third type of RTCP message:

+

Wherein, the SSRC of media source can represent the channel information of the channel, the media mark represents the processing information of the channel, and the media mark can be marked with 0 or 1, if the media mark field is 010101...0101, wherein, starting from left to right, The first digit, that is, 0, corresponds to the first SSRC of media source field in the third RTCP packet, and assuming 0 indicates that the channel corresponding to the channel information in the SSRC of media source field is stopped, and may also be represented by 0. The channel corresponding to the channel information in the SSRC of media source field is reserved or enabled, and the second digit corresponds to the second SSRC of media source field in the third RTCP packet, and so on. Keep or turn on the channel corresponding to the channel information in the SSRC of media source field. In the embodiment of the present invention, there is no limitation, that is, the message carrying the channel information of the new channel, the current channel, and the processing of the new channel are carried out by using 1 as the channel corresponding to the channel information in the SSRC of media source field. information.

The fourth type of RTCP packet:

+-+ -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- +-+-+-+-+-+-+-+

I V=2 I P | FHT I PT | length |

+-+ -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- +-+-+-+-+-+-+-+

I SSRC of packet sender: |

+-+ -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- +-+-+-+-+-+-+-+

I length of current media | length of new media |

+-+ -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- +-+-+-+-+-+-+-+

I SSRC of media source |

+-+ -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- +-+-+-+-+-+-+-+

I SSRC of media source |

+-+ -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- +-+-+-+-+-+-+-+

I Extens ions |

+-+ -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- +-+-+-+-+-+-+-+ where length of current media indicates that the processing information of the current channel needs to be stopped, or the processing information of the current channel is retained, and length of new mdeia indicates the processing information of the new channel, that is, The length of new media field indicates that the channel corresponding to the channel information in the N SSRC of media source fields in the fourth RTCP packet is stopped or reserved, N is a value of length of current media, and the length of new media field indicates that the fourth is enabled. The channel corresponding to the channel information in the M SSRC of media source fields in the RTCP message, M is the value of length of new media, it should be noted that when the N SSRC of media source fields are ranked in length of current media When the field and the length of new media field are followed, the M SSRC of media source fields include the N+1 SSRC of media source field of the N+1th media source field. In this embodiment, when the N SSRC of media source fields are ranked after the length of current media field and the length of new media field, the length of new media field indicates that the fourth RTCP is enabled. The channel corresponding to the channel information in the M SSRC of media source fields in the message, the length of current media field indicates that the channel corresponding to the channel information in the N SSRC of media source fields in the fourth RTCP message is stopped or reserved. It should be noted that the N SSRC of media source fields include the N+M SSRC of media source fields of the M+1th SSRC of media source field, which is equivalent to the channel information of the new channel carrying the message and Channel processing information. In this embodiment, the length of current media may be defaulted, then the length of new media field indicates that the channel corresponding to the channel information in the M SSRC of media source fields in the fourth RTCP message is enabled, and the remaining SSRC of media The channel corresponding to the channel information in the source field is reserved or stopped. Or in this embodiment, length of new media may be defaulted, then the length of current media field indicates that the channel corresponding to the channel information in the N SSRC of media source fields in the fourth RTCP message is stopped or reserved, and the remaining The channel information corresponding to the channel information in the SSRC of media source field is equivalent to the processing information of the new channel, that is, the message carries the channel information of the new channel and the processing information of the current channel and the new channel.

In addition, in this embodiment, the length of current media field and the length of new media field have no precedence order, or, when the length of current media field and the length of new media field are used as one field, this field and SSRC of media The source field has no precedence order.

In this embodiment, the channel switching data storage module 200 is configured to store the multicast data stream sent by the multicast server 10 and the key information of the media of the data stream. The media key information obtaining module 210 is configured to acquire description information of key information of the media of the multicast data stream stored by the channel switching data storage module 200. In this embodiment, the description information of the key information of the media may include, but is not limited to, the following: the location of the random access point of the channel of the media, the location of the description information required for the normal play of the channel, where the channel of the media is random The location of the access point can be the starting packet of the data stream to be sent when the random access point is located. The serial number, the description information required for the normal play of the channel may be the identifier of all the data contained in the channel and the type of the data stream, and may also analyze various parameter information required by the data stream, and the various data in the channel are required for synchronization. Information.

The message processing module 230 is configured to receive a handover request message sent by the terminal device 30, and parse the handover request message to obtain at least channel information of the new channel and processing information of the channel. That is, when the message processing module 230 parses the switching request message to include the channel information of the new channel and the processing information of the channel, the processing information of the channel includes the information of stopping the transmission of the data stream of the current channel, or retaining the information of the data stream of the current channel. At this time, the notification sending module 220 stops transmitting the unicast data stream of one or more current channels, or continues to transmit the unicast data stream of one or more current channels, and starts transmitting the unicast data stream of one or more new channels.

In this embodiment, when the current channel is one, the sending module 220 is further configured to: when the message processing module 230 parses the switching request message, the channel information including the new channel and the processing information of the current channel, and the processing information of the channel. When the information of the data stream of the current channel is stopped, or the information of the data stream of the current channel is retained, the data stream of the current channel is stopped according to the information of stopping the data stream of the current channel, or the current channel is reserved according to the The information of the data stream continues to transmit the data stream of the current channel, and the description information of the media key information of the new channel in the media key information obtaining module 210 is obtained according to the channel information of the new channel, and according to the description The information about the key information of the new channel and the data stream information of the random access point in the channel switching data storage module 200 are sent to the terminal device 30 through the unicast data stream. In this embodiment, the multicast data stream stored in the channel switching data storage module 200 is a transport stream (TS), the data stream information includes audio, video, data, etc., and the key information of the new channel includes the PSI of the channel. Random access point location for information and channels, IDR frame position or I frame position, and channel decoding parameters Number set SPS, PPS, etc.

When the current channel is multiple, the sending module 220 is further configured to: when the message processing module 230 obtains channel information of the current channel, channel information of the new channel, and processing information of the channel, the processing information of the channel includes stopping the data flow of the channel. Information, or information about the channel's data stream. In this embodiment, if it is necessary to stop one or more of the current channels, the channel information of the current channel includes the channel information of the current channel that needs to be stopped, or the channel information of the current channel that needs to be reserved. Stop transmitting the data stream of the stop channel according to the information of the data stream of the stop channel and the channel information of the current channel or continue to transmit the data stream of the reserved channel according to the information of the data stream of the reserved channel and the channel information of the current channel, Acquiring the description information of the media key information of the new channel in the media key information acquiring module 210 according to the channel information of the new channel, and acquiring the channel in the channel switching data storage module 200 according to the description information. The key information of the new channel and the data stream information of the random access point are transmitted to the terminal device 30 through the unicast data stream.

The sending module 220 is further configured to: when the message processing module 230 obtains channel information of the current channel, channel information of the new channel, and processing information of the channel, the processing information of the channel includes information of stopping the data flow of the channel and starting the data flow of the new channel. The information, or the information of the data stream of the reserved channel and the information of the data stream of the new channel, stop transmitting the data stream of the stop channel according to the information of the data stream of the stop channel and the channel information of the current channel. The information of the data stream of the reserved channel and the channel information of the current channel continue to transmit the data stream of the reserved channel, and acquire the media key information acquiring module 210 according to the channel information of the new channel and the information of the data stream for starting the new channel. The description information of the media key information of the new channel, and the key information of the new channel and the data flow information of the random access point in the channel switching data storage module 200 according to the description information, by unicast The data stream is sent to the terminal device 30. FIG. 3 is a schematic structural diagram of a terminal device and a channel switching server applied to channel switching according to Embodiment 2 of the present invention. In this embodiment, the terminal device 30 receives the unicast data stream sent by the channel switching server 20 and the multicast data stream sent by the multicast server 10, that is, in the embodiment, the data stream monitoring module 310 detects the data receiving module 300. The unicast data stream and the group multicast data stream are received mainly for synchronizing the data streams of the same channel transmitted by the switching channel server 20 and the multicast server 10. When the user needs to switch the current channel, the information about the switching channel is generated, and the terminal device 30 sends the information of the switching channel to the channel switching server 20 on the one hand, which is the same as the method of FIG. 2, and will not be described in detail here. On the one hand, the information of the multicast data stream that needs to be switched to the current channel is sent to the multicast server 10 to cause the multicast server 10 to stop transmitting the current channel multicast data stream.

FIG. 4 is a schematic structural diagram of a terminal device and a channel switching server applied to channel switching according to Embodiment 3 of the present invention. In this embodiment, the difference between FIG. 4 and FIG. 3 is that after the data flow of the same channel sent by the switching channel server 20 and the multicast server 10 is synchronized, the terminal device 30 receives the multicast data stream sent by the multicast server 10, The unicast data stream sent by the channel switching server 20 is not received, but the channel switching server 20 still sends some data about other services or services of the channel, for example, when there is an error in the multicast data stream of the channel sent by the multicast server 10. At the time of the data stream, the channel switching server 20 can be notified to resend part of the data stream for the channel. That is, in this embodiment, the data stream monitoring module 310 detects that the multicast data stream is received in the data receiving module 300. In this embodiment, the terminal device 30 also sends the information of the switching channel to the channel switching server 20 on the one hand, which is the same as the method of FIG. 2, and will not be described in detail here. In this embodiment, the current channel that needs to be switched is needed. And/or continue to send the data stream of the current channel that does not need to be switched to send a data stream related to the error or the lost data; on the other hand, the transmission disconnects the information of the multicast stream of the current channel to the multicast service. The device 10 switches the current channel multicast data stream so that the multicast server 10 stops transmitting. When performing channel switching, the terminal device provided by the embodiment of the present invention sends a handover request message to the channel switching server, that is, sends a handover request message to the channel switching server, where the handover request message includes at least the channel information of the new channel and the current channel. Processing the information to notify the channel switching server to stop or continue to send the data stream of the current channel, and cause the channel switching server to send the data stream of the new channel, that is, in a handover request message, the channel switching server needs to stop sending the data of the current channel. Streaming, and transmitting the data stream of the new channel, or continuing to send the data stream of the current channel and transmitting the data stream of the new channel, can shorten the information interaction time and information processing time in the channel switching process, and improve the channel switching speed, and Compared with the prior art, the request message leaving the unicast is sent separately from the request for the new channel request message, because the bandwidth of the link is increased due to the prior art, and the instance of the present invention is sent out at one time to reduce the interaction. The number of times, thereby reducing the interaction To the information, make the bandwidth without increasing the uplink, and also reduces the header overhead in the transmission information of the channel switching.

FIG. 5 is a flowchart of a method for switching a channel according to Embodiment 1 of the present invention.

In the present embodiment, the method of fast channel is applied to the case where only a unicast data stream is received. Step S500, detecting whether there is switching channel information of the user. In this embodiment, the current channel of the user may be one or multiple channels. There are several situations in which the channel information is switched: If the current channel is one, the user can stop the current channel, or the current channel can be reserved, and one or more channels to be played are added, and one more is added. Or multiple new channels; if there are multiple current channels, the user can stop one or more of the current multiple channels, and also retain one or more of the current multiple channels, or add one or more The channel to play.

Step S502, when detecting the switching channel information of the user, sending according to the switching channel information Switching the request message to the channel switching server, the switching request message includes at least channel information of the new channel and processing information of the channel. In this embodiment, a handover request message is sent to the channel switching server. If the current channel is stopped, the handover request message includes channel information of the new channel and processing information of the channel, and the processing information of the channel includes information for stopping the transmission of the data stream of the current channel; if the current channel is stopped, one or more new channels are added. When the channel to be played is selected, the switching request message includes channel information of the new channel and processing information of the channel, and the processing information of the channel includes information for stopping the transmission of the data stream of the current channel, and adding one or more channels to be played, Also, as a new channel; if one or more channels to be played are added when the current channel is reserved, the switching request message includes channel information of the new channel and processing information of the channel, and the processing information of the channel includes stopping or retaining the current The information of the data stream of the channel. In this case, the channel switching server defaults to add one or more channels to be played when receiving the channel information of the new channel.

In this embodiment, when there are multiple current channels, if one or more of the current channels are stopped, one or more of the current multiple channels are reserved, and the handover request message includes channel information of the current channel, The channel information of the new channel and the processing information of the channel, the processing information of the channel includes the information of the data stream of the stop channel, or the information of the data stream of the reserved channel, and the switching request message may also include the channel information of the current channel, the new channel. The channel information and the processing information of the channel, the processing information of the channel includes information of the data stream of the stop channel and information of the data stream for starting the new channel, or information of the data stream of the reserved channel and information of the data stream for starting the new channel. If one or more of the current channels are stopped, one or more of the current plurality of channels are reserved, and one or more channels to be played are added, the handover request message includes channel information of the current channel, and a new channel. Channel information and processing information of the channel, the processing information of the channel includes information of stopping the data flow of the channel, or Data stream of information channels, the handover request message may also include channel information of a current channel, a new channel frequency channels Processing information of the channel, the processing information of the channel includes information of the data stream of the stop channel and information of the data stream for starting the new channel, or information of the data stream of the reserved channel and information of the data stream for starting the new channel.

Step S504, parsing the handover request message, and obtaining at least channel information of the new channel and processing information of the channel;

Step S506: Stop or continue to send the data stream of the channel to the terminal device according to the processing information of the channel, and send the data stream of the new channel to the terminal device according to the channel information of the new channel.

In this embodiment, step S506 includes the following situations:

When the channel information of the new channel and the processing information of the channel are obtained, the processing information of the channel includes the information of stopping the data stream of the current channel, or the information of the data stream of the current channel is retained, and the data of the current channel is stopped according to the stopping. The streamed information stops transmitting the data stream of the current channel or continues to transmit the data stream of the current channel according to the information of the data stream retaining the current channel; and acquiring the media key information of the new channel according to the channel information of the new channel The information is obtained, and the key information of the new channel and the data stream information of the random access point are obtained according to the description information, and are sent to the terminal device through a unicast data stream.

When the channel information of the current channel, the channel information of the new channel, and the processing information of the channel are obtained, the processing information of the channel includes the information of the data stream of the stop channel, or the information of the data stream of the reserved channel, according to the stop channel The information of the data stream and the channel information of the current channel stop transmitting the data stream of the stop channel, or continue to transmit the data stream of the reserved channel according to the information of the data stream of the reserved channel and the channel information of the current channel; according to the new channel The channel information acquires description information of the media key information of the new channel; acquires key information of the new channel according to the description information, and randomly The data stream information of the access point is sent to the terminal device through the unicast data stream.

When the channel information of the current channel, the channel information of the new channel, and the processing information of the channel are obtained, the processing information of the channel includes information of stopping the data stream of the channel and information of starting the data stream of the new channel, or retaining the data stream of the channel. And transmitting information of the data stream of the new channel and the channel information of the current channel to stop transmitting the data stream of the stop channel according to the information of the data stream of the stop channel, or according to the information of the data stream of the reserved channel; The channel information of the current channel continues to transmit the data stream of the reserved channel; the description information of the media key information of the new channel is obtained according to the channel information of the new channel and the information of the data stream that starts the new channel; and the description information is obtained according to the description information. The key information of the new channel and the data stream information of the random access point are sent to the terminal device through the unicast data stream. The key information of the new channel and the data flow information of the random access are obtained according to the description information, and are sent to the terminal device through a unicast data stream.

FIG. 6 is a flowchart of a method for switching a channel according to Embodiment 2 of the present invention.

In the present embodiment, the difference between Fig. 5 and Fig. 6 is applied to the case where the unicast data stream and the multicast data stream are received. In this embodiment, steps S600, S604, and S606 in FIG. 6 are the same as steps S500, S504, and S506 in FIG. 5, and the description thereof will not be repeated here. Since FIG. 6 is applied to the case where the unicast data stream and the multicast data stream are received, the difference between step S602 in FIG. 6 and step S502 in FIG. 5 is that, in step S602, the disconnected multicast data stream needs to be sent again. Request to the multicast server to cause the multicast server to disconnect the multicast data stream. In this embodiment, the information of the disconnected multicast data stream is information for disconnecting the multicast data stream that needs to switch the current channel.

In the present embodiment, the difference between FIG. 7 and FIG. 6 is that FIG. 7 is applied to receive a multicast data stream of a relevant channel, and receives data of other services or services related to the channel, for example, in a multicast data stream. When there is an error or missing data, you need to resend the unicast data stream for this error or missing data. In this embodiment, steps S700, S702, S704, and S706 in FIG. 7 are the same as steps S600, S602, S604, and S606 in FIG. 6, and the description thereof will not be repeated here. Step S706 in FIG. 7 is different from step S606 in FIG. 6 in that, in step S706 in FIG. 7, the data stream of the current channel that needs to be switched is stopped, and the data of the current channel that does not need to be switched is continuously transmitted. The stream is a stream of data about errors or missing data.

The method for switching a channel provided by the embodiment of the present invention sends a handover request message to the channel switching server, that is, sends a handover request message to the channel switching server, where the handover request message includes at least the channel information of the new channel and the processing information of the current channel. Notifying the channel switching server to stop or continue to send the data stream of the current channel, and causing the channel switching server to send the data stream of the new channel, that is, in a handover request message, informing the channel switching server that the data stream of the current channel needs to be stopped, and Sending the data stream of the new channel, or continuing to send the data stream of the current channel and transmitting the data stream of the new channel, can shorten the information interaction time and information processing time in the channel switching process, improve the channel switching speed, and Compared with the request for sending a new channel request message separately from the unicast request message, the technology increases the bandwidth of the link due to the prior art, and the inventive example is sent out at one time to reduce the number of interactions. Thereby reducing the need for interaction The information does not increase the bandwidth of the uplink, and also reduces the overhead of header information when transmitting information in channel switching.

A person skilled in the art can understand that all or part of the process of implementing the above embodiment method can be completed by a computer program to instruct related hardware, and the program can be stored in a computer readable storage medium, the program When executed, the flow of an embodiment of the methods as described above may be included. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM). It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to be limiting, although the present invention will be described in detail with reference to the preferred embodiments. The technical solutions of the present invention may be modified or equivalently substituted, and the modified technical solutions may not deviate from the spirit and scope of the technical solutions of the present invention.

Claims

Rights request

A method for switching a channel, comprising:

2. The method according to claim 1, further comprising:

Receiving a channel data stream sent by the channel switching server.

The method according to claim 1, wherein the handover request message includes channel information of a new channel and processing information of a channel, the channel information includes an identifier of the channel, and the processing information of the channel includes stopping sending Information about the current channel's data stream, or information that retains the current channel's data stream.

The method according to claim 1, wherein the handover request message includes channel information of a current channel, channel information of a new channel, and processing information of a channel, and the processing information of the channel includes a data stream of the stop channel. Information, or information of a data stream of a reserved channel, the channel information including an identification of a channel.

The method according to claim 1, wherein the handover request message includes channel information of a current channel, channel information of a new channel, and processing information of a channel, and the processing information of the channel includes a data stream of the stop channel. The information and information of the data stream that initiates the new channel, or the information of the data stream that holds the channel and the information stream that initiates the new channel.

6. A channel switching method, characterized in that:

Receiving a handover request message sent by the terminal device; Parsing the handover request message, obtaining at least channel information of the new channel and processing information of the channel; stopping or continuing to send the data stream of the channel to the terminal device according to the processing information of the channel, and transmitting according to the channel information of the new channel The data of the new channel flows to the terminal device.

The method according to claim 6, wherein the step of parsing the handover request message to obtain at least channel information of a new channel and processing information of a channel comprises:

The channel information of the new channel and the processing information of the channel are obtained. The processing information of the channel includes information for stopping the transmission of the data stream of the current channel, or retaining the information of the data stream of the current channel, the channel information including the identifier of the channel.

The method according to claim 7, wherein the stopping or continuing to transmit the data stream of the channel to the terminal device according to the processing information of the channel, and transmitting the new channel according to the channel information of the new channel. The step of streaming data to the terminal device includes:

Stop transmitting the data stream of the current channel according to the information of stopping the data stream of the current channel, or continuing to send the data stream of the current channel according to the information of the data stream retaining the current channel; according to the channel information of the new channel Obtaining the description information of the media key information of the new channel; acquiring the key information of the new channel and the data stream information of the random access point according to the description information, and transmitting the data to the terminal device by using a unicast data stream.

Obtaining channel information of the current channel, channel information of the new channel, and processing information of the channel, the processing information of the channel includes information of a data stream of the stop channel, or information of a data stream of the reserved channel, where the channel information includes an identifier of the channel .

10. The method according to claim 9, wherein the processing according to the channel The information stops or continues to send the data stream of the channel to the terminal device, and the step of transmitting the data stream of the new channel to the terminal device according to the channel information of the new channel includes:

Stop transmitting the data stream of the stop channel according to the information of the data stream of the stop channel and the channel information of the current channel, or continue to transmit the data stream of the reserved channel according to the information of the data stream of the reserved channel and the channel information of the current channel. ;

Obtaining description information of the media key information of the new channel according to the channel information of the new channel; acquiring key information of the new channel and data flow information of the random access point according to the description information, and sending the data through the unicast data stream To the terminal device.

The method according to claim 8, wherein the step of parsing the handover request message to obtain at least channel information of a new channel and processing information of a channel comprises:

Obtaining channel information of the current channel, channel information of the new channel, and processing information of the channel, the processing information of the channel includes information of stopping the data stream of the channel and information of the data stream for starting the new channel, or information of the data stream of the reserved channel And information for initiating a data stream of the new channel, the channel information including an identification of the channel.

The method according to claim 11, wherein the data flow of the channel is stopped or continued according to the processing information of the channel to the terminal device, and the new channel is sent according to the channel information of the new channel. The step of streaming data to the terminal device includes:

Obtaining, according to the channel information of the new channel and the information of the data stream that starts the new channel, the description information of the media key information of the new channel; And acquiring the key information of the new channel and the data stream information of the random access point according to the description information, and sending the data to the terminal device by using a unicast data stream. And acquiring the key information of the new channel and the data flow information of the random access according to the description information, and sending the data to the terminal device by using a unicast data stream.

13. A terminal device, comprising:

a behavior detecting module, configured to detect whether the switching channel information of the user is received;

a switching processing module, configured to: when the behavior detecting module detects the switching channel information of the user, send a switching request message to the channel switching server, so that the channel switching server stops or continues to send the current according to the switching request message. a data stream of the channel, and causing the channel switching server to send a data stream of the new channel, wherein the handover request message includes at least channel information of the new channel and processing information of the channel.

The terminal device according to claim 13, further comprising:

And a data receiving module, configured to receive a channel data stream sent by the channel switching server.

The terminal device according to claim 13, wherein the handover request message includes channel information of the new channel and processing information of the channel, the channel information includes an identifier of the channel, and the processing information of the channel includes stopping sending the current Information about the channel's data stream, or information that retains the current channel's data stream.

The terminal device according to claim 13, wherein the handover request message includes channel information of a current channel, channel information of a new channel, and processing information of a channel, and the processing information of the channel includes data of a stop channel. The information of the stream, or the information of the data stream of the reserved channel, the channel information including the identifier of the channel.

The terminal device according to claim 13, wherein the handover request message includes channel information of a current channel, channel information of a new channel, and processing information of a channel, where The processing information includes information for stopping the data stream of the channel and information for starting the data stream of the new channel, or information for retaining the data stream of the channel and information for starting the data stream of the new channel.

18. A channel switching server, comprising:

The channel switching server according to claim 18, further comprising: a channel switching data storage module, configured to store key information of the channel data stream and the media of the data stream;

The media key information obtaining module is configured to obtain description information of the key information of the media of the data stream in the channel switching data storage module, where the description information of the key information of the media includes: a random access point of the channel of the media Position, the location of the description information required for the normal play of the channel, the location of the random access point of the channel of the media may be the serial number of the start packet of the data stream to be sent when the random access point is located, the channel is normal The description information required for playback is the identification of all data included in the channel and the type of data stream, various parameter information required for parsing the data stream, and information required for synchronization of various data in the channel.

The channel switching server according to claim 18, wherein the sending module is further configured to: when the message processing module obtains channel information of a new channel and processing information of a channel, the processing information of the channel includes stopping When transmitting information of a data stream of a current channel or retaining information of a data stream of a current channel, the channel information includes an identifier of a channel, and according to the stop sending the current channel The information of the data stream stops transmitting the data stream of the current channel or continues to send the data stream of the current channel according to the information of the data stream that retains the current channel, and acquires the media key information acquiring module according to the channel information of the new channel. Decoding information of the media key information of the new channel, and acquiring key information of the new channel and data flow information of the random access point in the channel switching data storage module according to the description information, by using unicast The data stream is sent to the terminal device.

The channel switching server according to claim 18, wherein the sending module is further configured to: when the message processing module obtains channel information of a current channel, channel information of a new channel, and processing information of a channel, When the processing information of the channel includes the information of the data stream of the stop channel or the information of the data stream of the reserved channel, the channel information includes the identifier of the channel, and stops sending according to the information of the data stream of the stop channel and the channel information of the current channel. And stopping the data flow of the reserved channel according to the information of the data stream of the reserved channel and the channel information of the current channel, and acquiring the media key information acquiring module according to the channel information of the new channel. The description information of the media key information of the new channel, and acquiring the key information of the new channel and the data stream information of the random access point in the channel switching data storage module according to the description information, by using unicast data The stream is sent to the terminal device.

The channel switching server according to claim 18, wherein the sending module is further configured to: when the message processing module obtains channel information of a current channel, channel information of a new channel, and processing information of a channel, The processing information of the channel includes information of the data stream of the stop channel and information of the data stream for starting the new channel, or information of the data stream of the reserved channel and information of the data stream for starting the new channel, the channel information including the identifier of the channel, Stop transmitting the data stream of the stop channel according to the information of the data stream of the stop channel and the channel information of the current channel or continue to transmit the data stream of the reserved channel according to the information of the data stream of the reserved channel and the channel information of the current channel, And according to the new The channel information of the channel and the information of the data stream that starts the new channel are used to obtain the description information of the media key information of the new channel in the media key information acquiring module, and obtain the channel switching data storage module according to the description information. The key information of the new channel and the data stream information of the random access point are sent to the terminal device through a unicast data stream.

23. A method for switching channels, characterized in that:

Each message carries at least channel information of the new channel and processing information of the channel for requesting to stop or continue to transmit the data stream of the current channel, and requesting to transmit the data stream of the new channel.

The message according to claim 23, wherein the message carries channel information of a new channel and processing information of a channel, and the processing information of the channel includes information for stopping sending a data stream of the current channel, or Keep information about the current channel's data stream.

The message according to claim 23, wherein the message carries channel information of a current channel, channel information of a new channel, and processing information of a channel, and the processing information of the channel includes a data stream of the stop channel. Information, or information about the channel's data stream.

The message according to claim 23, wherein the message carries channel information of a current channel, channel information of a new channel, and processing information of a channel, and the processing information of the channel includes a data stream of the stop channel. The information and information of the data stream that initiates the new channel, or the information of the data stream that holds the channel and the information stream that initiates the new channel.