WO2015161680A1

WO2015161680A1 - Code stream transmission method, device, server and system

Info

Publication number: WO2015161680A1
Application number: PCT/CN2015/070214
Authority: WO
Inventors: 陈斌; 姜炎; 平云娟
Original assignee: 中兴通讯股份有限公司
Priority date: 2014-04-24
Filing date: 2015-01-06
Publication date: 2015-10-29
Also published as: CN105007499A; CN105007499B

Abstract

A code stream transmission method, device, server and system. The code stream transmission method comprises: receiving a code stream sent by an encoder and storing same; confirming a download request sent by a CDN node; and sending the code stream sent by the encoder to the CDN node.

Description

Code stream transmission method, device, server and system

Technical field

The present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, a server, and a system for transmitting a code stream.

Background technique

In the Internet Protocol Television (IPTV)/Overview Network (OTT) system, the code stream transmission method is generally that the encoder passes the code stream through the PUSH (push, active transmission) mode. It is sent to the content delivery network (CDN) central node, and then the CDN central node and the CDN edge node are relayed by PULL (pull, active acquisition), and the traditional code stream transmission method will cause at least the following two. Questions:

1. In actual applications, the IP address of the card at the central node of the CDN is subject to change, and the IP address of the new board is added due to the addition of a new CDN central node. In this case, the encoder needs to be modified and adjusted. .

2. The encoder transmits the code stream directly to the CDN central node through the PUSH mode, so that the number of CDN central nodes is limited. If the number of CDN central nodes increases, the performance of the encoder push code stream will be compared. Great impact.

In view of the problem that the encoder in the related art is affected by the change of the CDN node, an effective solution has not been proposed yet.

Summary of the invention

For the problem that the encoder is affected by the change of the CDN node in the related art, the embodiment of the present invention provides a method, a device, a server and a system for transmitting a code stream to solve at least the above problem.

An embodiment of the present invention provides a method for transmitting a code stream, including: receiving a code stream sent by an encoder and storing, confirming a download request sent by a CDN node, and sending the code stream sent by the encoder to The CDN node.

Optionally, the code stream sent by the receiving encoder includes: a total index file, a sub-shard file, and a channel index file that are sent by the encoder in sequence; and the confirming the download request sent by the CDN node, including: sequentially confirming the The download total index file request, the download channel index file request, and the download sub-slice file request sent by the CDN node.

Optionally, the method for transmitting the code stream further includes: receiving a delete sub-fragment file command periodically sent by the encoder, and deleting the sub-fragment file that exceeds a preset cache period.

Optionally, after the receiving the code stream sent by the encoder, the method further includes: counting the number of channels established by the encoder; and sending the alarm information to the network management when the number of the channels exceeds a preset upper threshold.

Optionally, after the confirming the download request sent by the CDN node, the method further includes: counting the number of the CDN nodes; and sending the alarm information to the network management when the number of the CDN nodes exceeds a preset upper threshold.

Optionally, after the receiving the code stream sent by the encoder, the method further includes: counting the number of channels established by the encoder; and sending the alarm information to the network management when the number of the channels exceeds a preset upper threshold. The confirming the download request sent by the CDN node further includes: counting the number of the CDN nodes; and sending the alarm information to the network management when the number of the CDN nodes exceeds a preset upper threshold.

An embodiment of the present invention further provides a code stream transmission apparatus, including: a receiving module, configured to receive a code stream sent by an encoder; a storage module, configured to store a code stream sent by the encoder; and an acknowledgment module, configured to confirm a CDN node Sending a download request; the sending module is configured to send the code stream sent by the encoder to the CDN node.

Optionally, the receiving module is configured to receive the code stream sent by the encoder in the following manner: the total index file, the sub-shard file, and the channel index file sent by the encoder in sequence; the confirmation module is set to be as follows The mode confirms the download request sent by the CDN node: sequentially confirming the download total index file request, the download channel index file request, and the download sub-fragment file request sent by the CDN node.

Optionally, the foregoing code stream transmission apparatus further includes: a log management module, configured to receive the edit The coder periodically sends a delete sub-fragment file command, and deletes the sub-fragment file that exceeds the preset cache period.

Optionally, the foregoing code stream transmission apparatus further includes: a first detecting module, configured to count the number of channels established by the encoder; and an alarm module, configured to: when the number of the channels exceeds a preset upper threshold The NMS sends an alarm.

Optionally, the foregoing code stream transmission device further includes: a second detecting module, configured to count the number of the CDN nodes; and an alarm module, configured to send to the network management when the number of the CDN nodes exceeds a preset upper threshold Alarm information.

Optionally, the foregoing code stream transmission apparatus further includes: a first detecting module, configured to count the number of channels established by the encoder; and a second detecting module, configured to count the number of the CDN nodes; The module is configured to send an alarm message to the network management when the number of the channels exceeds a preset upper threshold, and is further configured to send an alarm message to the network management when the number of the CDN nodes exceeds a preset upper threshold.

Embodiments of the present invention also provide a server, which may include a processor and a memory, the memory storing program instructions that, when executed, cause the server to perform the method described above.

An embodiment of the present invention provides a code stream transmission system, including an encoder, a CDN node, and at least one server; the encoder is configured to compile and send the original code stream to the server; the CDN node And sending a download request to the server, and acquiring a code stream sent by the server; the server is configured to receive a code stream sent by the encoder, confirm a download request sent by the CDN node, and send the code to the encoder. The code stream is sent to the CDN node.

Optionally, the number of the servers is two, and a heartbeat line is connected between the two servers, and the main standby device is used to prevent a single point of failure.

Embodiments of the present invention also provide a computer readable storage medium storing program instructions that, when executed, cause the server to perform the method described above.

According to the embodiment of the present invention, the code stream sent by the encoder is received, the download request sent by the CDN node is confirmed, and the code stream sent by the encoder is sent to the CDN node, so that the CDN node is later The encoder does not need to be modified when the board IP address is changed or other CDN nodes are added. And when the number of CDN nodes increases, the performance of the encoder remains stable and is not affected by the number of CDN nodes.

BRIEF abstract

The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

1 is a flowchart of a code stream transmission method according to an embodiment of the present invention;

2 is an optional flowchart of a code stream transmission method according to an embodiment of the present invention;

3 is a block diagram showing the structure of a code stream transmission apparatus according to an embodiment of the present invention;

4 is a block diagram showing an optional structure of a code stream transmission apparatus according to an embodiment of the present invention;

FIG. 5 is a block diagram 2 of an optional structure of a code stream transmission apparatus according to an embodiment of the present invention; FIG.

6 is a structural block diagram of a code stream transmission server according to an embodiment of the present invention;

FIG. 7 is a block diagram showing an optional structure of a code stream transmission system networking according to an embodiment of the present invention.

Preferred embodiment of the invention

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

The embodiment of the present invention provides a method for code stream transmission. FIG. 1 is a flowchart of a code stream transmission method according to an embodiment of the present invention. As shown in FIG. 1, the method includes the following steps (S101 to S103):

S101. Receive a code stream sent by an encoder and store the code stream.

S102. Confirm a download request sent by the CDN node.

S103. Send the code stream sent by the encoder to the CDN node.

In this embodiment, the encoder receives the original code stream and sends it to the server, and the server stores the code stream sent by the encoder and stores the code stream locally, when the CDN node sends the code stream to the server. When downloading the request, the above server confirms the download request and sends the stored code stream to the CDN node.

According to the embodiment of the present invention, the code stream sent by the encoder is received, the download request sent by the CDN node is confirmed, and the code stream sent by the encoder is sent to the CDN node, so that the IP address of the CDN node is changed or increased. The encoder does not need to make any changes to other CDN nodes. And when the number of CDN nodes increases, the performance of the encoder remains stable and is not affected by the number of CDN nodes.

In an embodiment of the present invention, FIG. 2 is an optional flowchart of a code stream transmission method according to an embodiment of the present invention. As shown in FIG. 2, the code stream transmission method may include the following steps (S201 to S211). :

S201, the encoder prepares a source code stream, performs coding and segmentation;

S202. The encoder uploads the total index file to the server.

S203. The encoder uploads the sub-shard file to the server.

S204. The encoder uploads the channel index file to the server.

S205. The CDN node sends a request for downloading a total index file to the server.

S206. The server sends the total index file sent by the encoder to the CDN node.

S207. The CDN node sends a download channel index file request to the server.

S208. The server sends the channel index file sent by the encoder to the CDN node.

S209. The CDN node sends a download sub-slice file request to the server.

S210. The server sends the sub-fragment file sent by the encoder to the CDN node.

In an embodiment of the present invention, the command to delete the sub-shard file sent by the encoder may be received, the cached period of the stored sub-shard file is set in advance, and the sub-fragment file exceeding the cache period is deleted. . This can periodically clear the cache to ensure sufficient code stream storage space. In addition, the server can also set the storage policy by itself, and delete the stored code stream according to the policy.

In an embodiment of the present invention, the code stream sent by the encoder is received, and the number of channels established by the encoder is also counted, and an upper threshold is set. When the number of channels established by the encoder exceeds a set upper threshold. Send an alarm message and report the alarm information sent to the network to the network. tube. After the alarm is cleared, the information about the alarm is also reported to the NMS. Optionally, the number of channels established by the encoder is counted and an upper threshold is set. When the number of channels established by the encoder exceeds the upper threshold, the alarm information is sent to include the following steps:

S501, setting a channel counter, and setting a channel counter to an upper limit;

S502. After receiving the channel establishment request sent by the encoder, detecting whether the number of channels exceeds a counting upper limit of the channel counter;

S503, if the upper limit of the channel counter is not exceeded, the channel counter is incremented by one;

S504. If the upper limit of the channel counter is exceeded, the encoder request is rejected and an alarm is sent;

S505, a time is preset, such as 10 seconds, 20 seconds, 30 seconds, 40 seconds, etc., and the channel counter is decremented by 1 when the channel counter does not respond within the time.

In an embodiment of the present invention, when the download request sent by the CDN node is confirmed, the number of CDN nodes that send the download request may be counted and an upper threshold is set, and when the number of CDN nodes that send the download request exceeds the upper threshold. The alarm information is sent, and the alarm information sent by the above is reported to the NMS. After the alarm is cleared, the information about the alarm is also reported to the NMS. Optionally, the number of the CDN nodes that send the download request is counted, and the upper threshold is set. When the number of the CDN nodes that send the download request exceeds the upper threshold, sending the alarm information includes the following steps:

S601, setting a user counter, and setting a user counter to an upper limit;

S602. After receiving the download request sent by the CDN node, detecting whether the number of CDN nodes exceeds the upper limit of the user counter;

S603, if the upper limit of the user counter is not exceeded, the user counter is incremented by one;

S604. If the upper limit of the user counter is exceeded, the download request of the CDN node is rejected and an alarm is sent;

S605, a time is preset, such as 10 seconds, 20 seconds, 30 seconds, 40 seconds, etc., and the user counter is decremented by 1 when the user counter does not respond within the time.

In an embodiment of the present invention, the code stream sent by the encoder is received, and the number of channels established by the encoder is counted and an upper threshold is set, and when the number of channels established by the encoder exceeds a set upper threshold, the identifier is sent. The alarm information, at the same time, confirms the download request sent by the CDN node, and can also count the number of CDN nodes that send the download request and set an upper threshold, when sent The alarm information is sent when the number of the requested CDN nodes exceeds the upper threshold. The alarm information sent is reported to the NMS. After the alarm is cleared, the information about the alarm is also reported to the NMS.

The embodiment of the present invention further provides a code stream transmission apparatus. FIG. 3 is a structural block diagram of a code stream transmission apparatus according to an embodiment of the present invention. As shown in FIG. 3, the apparatus includes: a receiving module 301, a storage module 302, and a confirmation. The module 303 and the sending module 304, wherein the receiving module 301 is configured to receive the code stream sent by the encoder, the storage module 302 is configured to store the code stream received by the receiving module, and store the code stream, and the confirmation module 303 is configured to receive And confirming the download request sent by the CDN node; the sending module 304 is configured to send the code stream sent by the encoder after the confirmation module 303 completes the confirmation to the CDN node.

Through the embodiment of the present invention, the receiving module 301 receives the code stream sent by the encoder and stores it in the storage module 302. The confirmation module 303 receives the download request sent by the CDN node and completes the confirmation, and the sending module 304 then prepares the encoder. The sent code stream is sent to the CDN node, so that the encoder does not need to be directly connected to the CDN node, that is, the encoder does not need to fill in the IP address of the CDN node board, and the encoder does not need to be added when the CDN node is added or the board IP address changes occur. Making changes will not affect the performance of the encoder.

In an embodiment of the present invention, FIG. 4 is an optional structural block diagram of a code stream transmission apparatus according to an embodiment of the present invention. As shown in FIG. 4, the apparatus may further include: a log management module 305. The storage space of the code stream storage device 302 is limited. In the actual working process, the storage module 302 is likely to accumulate a large number of redundant sub-shard files, and the log management module 305 is responsible for receiving the encoder periodically. The sub-fragment file command is deleted, and the sub-fragment file stored in the storage module 302 is set to a cache period. After receiving the command to delete the sub-fragment file sent by the encoder, the sub-fragment file exceeding the cache period is deleted. To ensure that the storage module 302 has sufficient storage space.

In an embodiment of the present invention, FIG. 5 is a block diagram of an optional block diagram of a code stream transmission apparatus according to an embodiment of the present invention. As shown in FIG. 5, the apparatus may further include: a first detection module 307, The second detection module 308 and the alarm module 306.

The first detecting module 307 counts the number of channels established by the encoder, and sets an upper threshold. When the number of the channels exceeds the upper threshold, the alarm information is sent. The second detecting module 308 sends the number of CDN nodes that send the download request. Counting and setting an upper threshold, the CDN nodes When the number exceeds the upper threshold, the alarm information is sent; the alarm module 306 collects the alarm information sent and reports the information to the network management system; when the number of channels or the number of CDN nodes exceeds the upper threshold, the first detection module 307 or the second The detection module 308 sends the alarm information, and the alarm module 306 collects the alarm information and reports it to the network management system. When the alarm is removed from the first detection module 307 or the second detection module 308, the alarm module 306 also reports the alarm elimination information to the network management system.

Optionally, the number of channels established by the encoder is counted and an upper threshold is set, and when the number of channels established by the encoder exceeds the set upper threshold, an alarm message is sent, and the number of CDN nodes that send the download request is counted. The upper threshold is set. When the number of CDN nodes that send the download request exceeds the upper threshold, sending the alarm information includes the following steps:

S701, the first detecting module 307 sets a channel counter, and sets the channel counter to the upper limit of the counting; the second detecting module 308 sets a user counter, and sets the user counter to the upper limit of counting.

S702. After receiving the channel establishment request sent by the encoder, the first detecting module detects whether the channel number exceeds the upper limit of the channel counter. After receiving the download request sent by the CDN node, the second detecting module detects whether the number of CDN nodes exceeds the user counter. The upper limit of the count.

S703: if the upper limit of the channel counter is not exceeded, the channel counter is incremented by one; if the upper limit of the user counter is not exceeded, the user counter is incremented by one.

S704. If the upper limit of the channel counter is exceeded, the request of the encoder is rejected and the alarm is sent; if the upper limit of the user counter is exceeded, the download request of the CDN node is rejected and the alarm is triggered.

S705, preset a time, such as 10 seconds, 20 seconds, 30 seconds, 40 seconds, etc., if the channel counter does not respond within the time, the channel counter is decremented by 1; a preset time, such as 10 seconds, 20 Seconds, 30 seconds, 40 seconds, etc., during which the user counter does not respond, the user counter is decremented by one.

It should be noted that the first detection module and the second detection module do not have to be included in the device at the same time, and may include only the first detection module and the alarm module, or only the second detection module and the alarm module. Of course, the foregoing embodiment can include a log management module at the same time.

The embodiment of the present invention further provides a server. FIG. 6 is a structural block diagram of a code stream transmission server according to an embodiment of the present invention. As shown in FIG. 6, the server may include a processor 405; Block 401, configured to receive a code stream sent after the encoder is programmed; the storage module 402 is configured to store the code stream received by the receiving module; the confirmation module 403 is configured to receive and confirm a download request sent by the CDN node; and the sending module 404 After the confirmation module 403 completes the confirmation, the code stream sent by the encoder is sent to the CDN node.

The server in the embodiment of the present invention may further include an alarm module, and may also include an alarm module and the first detection module and/or the second detection module. Of course, the foregoing embodiment can include a log management module at the same time.

An embodiment of the present invention further provides a code stream transmission system, where the code stream transmission system includes an encoder, a CDN node, and a server, wherein the server may be set to one or two or more; the following is to set two servers as The details are explained. As shown in FIG. 7, the system includes a server 1 and a server 2, which are mutually standby and connected by a heartbeat line.

As shown in FIG. 7, the encoder is connected to the server 1 and transmits the code stream to the server 1. The server 1 is connected to the CDN node, receives and confirms the download request sent by the CDN node, and transmits the code stream to the CDN node. When the server 1 fails to work normally, the heartbeat detects the fault and reflects it to the backup machine, that is, the server 2, and the server 2 can immediately replace the server 1 to receive the code stream sent by the encoder, receive and confirm the download request sent by the CDN node and The code stream is sent to the CDN node, which ensures the smooth operation of the network and the normal operation of the service.

One of ordinary skill in the art will appreciate that all or a portion of the steps of the above-described embodiments can be implemented using a computer program flow, which can be stored in a computer readable storage medium, such as on a corresponding hardware platform (eg, The system, device, device, device, etc. are executed, and when executed, include one or a combination of the steps of the method embodiments.

Alternatively, all or part of the steps of the above embodiments may also be implemented by using an integrated circuit. These steps may be separately fabricated into individual integrated circuit modules, or multiple modules or steps may be fabricated into a single integrated circuit module. achieve. Thus, the invention is not limited to any specific combination of hardware and software.

The devices/function modules/functional units in the above embodiments may be implemented by a general-purpose computing device, which may be centralized on a single computing device or distributed over a network of multiple computing devices.

Each device/function module/function unit in the above embodiment is implemented in the form of a software function module. And when sold or used as a stand-alone product, it can be stored on a computer readable storage medium. The above mentioned computer readable storage medium may be a read only memory, a magnetic disk or an optical disk or the like.

Industrial applicability

Claims

A code stream transmission method includes:

Receiving a code stream sent by the encoder and storing it;

Confirming a download request sent by a content distribution network (CDN) node;

And transmitting, according to the download request, the corresponding code stream to the CDN node.
The method of claim 1 wherein

The code stream sent by the receiving encoder includes: a total index file, a sub-shard file, and a channel index file that are sequentially sent by the receiving encoder;

The confirming the download request sent by the CDN node includes: sequentially confirming the download total index file request, the download channel index file request, and the download sub-slice file request sent by the CDN node.
The method of claim 2, further comprising: receiving a delete sub-fragment file command sent by the encoder at a time, and deleting the sub-fragment file that exceeds a preset cache period.
The method of claim 1, wherein after the receiving the code stream transmitted by the encoder, the method further comprises:

Counting the number of channels established by the encoder;

When the number of the channels exceeds the preset upper threshold, the alarm information is sent to the network management.
The method according to claim 1 or 4, wherein after the confirming the download request sent by the CDN node, the method further comprises:

Counting the number of the CDN nodes;

When the number of the CDN nodes exceeds a preset upper threshold, the alarm information is sent to the network management.
A code stream transmission device comprising:

a receiving module, configured to: receive a code stream sent by the encoder;

a storage module, configured to: store a code stream sent by the encoder;

a confirmation module, configured to: confirm a download request sent by a content distribution network (CDN) node;

And a sending module, configured to: send the code stream sent by the encoder to the CDN node.
The code stream transmission device according to claim 6, wherein

The receiving module is configured to receive the code stream sent by the encoder in the following manner: the total index file, the sub-shard file, and the channel index file sent by the receiving encoder in sequence;

The confirmation module is configured to confirm the download request sent by the CDN node in the following manner: sequentially confirm the download total index file request, the download channel index file request, and the download sub-slice file request sent by the CDN node.
The code stream transmission apparatus according to claim 7, further comprising:

And a log management module, configured to: receive a delete sub-fragment file command sent by the encoder periodically, and delete the sub-fragment file that exceeds a preset cache period.
The code stream transmission device according to claim 6, further comprising:

a first detecting module, configured to: count the number of channels established by the encoder;

The alarm module is configured to send an alarm message to the network management when the number of the channels exceeds a preset upper threshold.
The code stream transmission device according to claim 6, further comprising:

a second detecting module, configured to: count the number of the CDN nodes;

The alarm module is configured to send an alarm message to the network management when the number of the CDN nodes exceeds a preset upper threshold.
A server that includes:

Processor and memory;

The memory stores program instructions that, when executed, cause the server to perform the method of any of claims 1-5.
A code stream transmission system comprising an encoder, a content distribution network (CDN) node, and at least one server;

The encoder is configured to program the original code stream and send to the server;

The CDN node is configured to send a download request to the server, and acquire a code stream sent by the server;

The server is configured to receive a code stream sent by the encoder, confirm a download request sent by the CDN node, and send the code stream sent by the encoder to the CDN node.
The code stream transmission system according to claim 12, wherein the number of the servers is two, and a heartbeat line is connected between the two servers, which are mutually active standby machines.
A computer readable storage medium storing program instructions that, when executed, cause the server to perform the method of any of claims 1-5.