CN102802043A - Distributed monitoring system and video on demand method and device - Google Patents
Distributed monitoring system and video on demand method and device Download PDFInfo
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Abstract
The invention provides a distributed monitoring system and a video on demand method and device. The video on demand method comprises the steps of: after receiving a video on demand command of a user, determining a data transmission optical link between the user and a client end according to the video on demand command and a link selection rule, and sending the video data to the client end through the data transmission optical link, therefore, transmission links are dynamically distributed, and therefore, even if some link load is heavy, the failure of video on demand can be avoided.
Description
Technical Field
The invention relates to the field of video monitoring, in particular to a distributed monitoring system and a video-on-demand method and device thereof.
Background
The monitoring videos collected in the distributed monitoring system are usually stored in a distributed mode, when monitoring videos needing to be collected on demand are watched, when any service node receives an on-demand instruction, if the monitoring videos requested by a user are not stored in the current service node, the on-demand instruction is forwarded through other service nodes, and after the service node where the monitoring videos are located receives the on-demand instruction, the monitoring videos are sent to a client through a fixed data link. The data link may be a link between a service node where the monitoring video is located and the client, or a data link formed by forwarding the service node where the monitoring video is located through other service nodes.
Disclosure of Invention
In view of this, the present invention provides a distributed monitoring system and a video-on-demand method and device thereof, and aims to solve the problem that the video-on-demand method of the existing distributed monitoring system is easy to fail.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:
the video-on-demand method of the distributed monitoring system is characterized by comprising the following steps:
receiving a request instruction of a user;
when the on-demand instruction meets a first condition, determining an optimal data transmission link between the client and the on-demand instruction according to a link selection rule;
and sending the video data indicated in the on-demand instruction to the client through the optimal data transmission link.
Preferably, the link selection rule includes:
taking the link with the lightest load with the client as an optimal link; or,
and taking the link closest to the client as the optimal link.
Preferably, the first condition comprises:
and the video data indicated in the on-demand instruction is local video data.
Preferably, the method further comprises the following steps:
and when the on-demand instruction does not meet the first condition, forwarding the on-demand instruction.
Preferably, the forwarding the on-demand instruction includes:
determining an optimal service node forwarded by the on-demand instruction according to a service node selection rule;
and forwarding the on-demand instruction to a target service node through the optimal service node forwarded by the on-demand instruction.
Preferably, the service node selection rule includes:
and taking the service node with the lightest load as the optimal service node.
Preferably, the specific manner of sending the video data indicated in the on-demand instruction to the client via the data transmission optimal link includes:
and (4) a streaming media mode.
A video-on-demand apparatus for a distributed monitoring system, comprising:
the receiving module is used for receiving the on-demand instruction of the user;
the data transmission optimal link determining module is used for determining a data transmission optimal link between the client and the client according to a link selection rule when the on-demand instruction meets a first condition;
and the sending module is used for sending the video data indicated in the on-demand instruction to the client through the data transmission optimal link.
Preferably, the data transmission optimal link determining unit includes:
a calculating unit, configured to calculate a load of a link with the client; or, calculating a distance to a link between the client and the server;
and the determining unit is used for determining the link with the minimum load or the shortest distance as the optimal link for data transmission.
Preferably, the method further comprises the following steps:
and the forwarding module is used for forwarding the on-demand instruction when the on-demand instruction does not meet the first condition.
Preferably, the forwarding module includes:
the optimal service node determining unit is used for determining the optimal service node forwarded by the on-demand instruction according to the service node selection rule;
and the forwarding unit is used for forwarding the on-demand instruction to the target service node through the optimal service node forwarded by the on-demand instruction.
Preferably, the optimal serving node determining unit includes:
the computing subunit is used for computing the load of the service node;
and the determining subunit is used for determining the service node with the lightest load as the optimal service node.
A distributed monitoring system, comprising:
and the service node is used for receiving a video-on-demand instruction of a user, determining an optimal data transmission link with the client according to a link selection rule when the video-on-demand instruction meets a first condition, and sending the video data indicated in the video-on-demand instruction to the client through the optimal data transmission link.
According to the distributed monitoring system and the video-on-demand method and device thereof, after the video-on-demand instruction of the user is received, the optimal data transmission link between the distributed monitoring system and the client can be determined according to the video-on-demand instruction and the link selection rule, and the video data is sent to the client through the optimal data transmission link, so that the transmission link is dynamically distributed, and therefore, even if a certain link is overloaded, the failure of video-on-demand can be avoided.
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 description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flowchart of a video-on-demand method of a distributed monitoring system according to an embodiment of the present invention;
FIG. 2 is a flowchart of a video-on-demand method of another distributed monitoring system according to an embodiment of the present invention;
FIG. 3 is a flowchart of a video-on-demand method of another distributed monitoring system according to an embodiment of the present invention;
FIG. 4 is a flowchart of a video-on-demand method of another distributed monitoring system according to an embodiment of the present disclosure;
FIG. 5 is a schematic structural diagram of a video-on-demand apparatus of a distributed monitoring system according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a video-on-demand apparatus of another distributed monitoring system according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a video-on-demand apparatus of another distributed monitoring system according to an embodiment of the present invention.
Detailed Description
The invention discloses a video-on-demand method and device of a distributed monitoring system and the distributed monitoring system, aiming at solving the problem that video-on-demand in the distributed monitoring system is easy to fail.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the present invention discloses a video-on-demand method for a distributed monitoring system, wherein the storage of monitoring videos in the distributed monitoring system is also distributed, that is, the monitoring videos are stored in different service nodes, as shown in fig. 1, the method is applied to any one service node in the distributed monitoring system, and the method includes:
s101: receiving a request instruction of a user;
the on-demand instruction of the user refers to an instruction of the user for on-demand of the monitoring video in the distributed monitoring system.
S102: when the on-demand instruction meets a first condition, determining an optimal data transmission link between the client and the on-demand instruction according to a link selection rule;
the first condition and the link selection rule may be preset by a user, and the optimal data transmission link between the service node and the user refers to a data link for sending the monitoring video from the current service node to the client, where the quality of the data link is optimal, and may be specifically expressed in that the load of the data link is lightest, or the data link is a data link with the shortest distance from the current service node to the client.
S103: and sending the video data indicated in the on-demand instruction to the client through the optimal data transmission link.
According to the video-on-demand method in the distributed monitoring system, the service node receiving the on-demand instruction can select the optimal link from the service node to the client as the link for sending the video data according to the first condition and the link selection rule, so that the dynamic allocation of the data link is realized, and the video data can be guaranteed to be transmitted to the sending end.
The video-on-demand method of another distributed monitoring system disclosed in the embodiment of the present invention is applied to any service node in the distributed monitoring system, and as shown in fig. 2, the method includes:
s201: receiving a request instruction of a user;
s202: judging whether the video data indicated in the on-demand instruction is local video data, if so, executing S203, and if not, executing S205;
s203: determining an optimal data transmission link between the current service node and the client according to a link selection rule;
in this embodiment, the link selection rule includes: and taking the link with the lightest load with the client as an optimal link, or taking the link closest to the client as the optimal link. The first link selection rule takes the link with the lightest load or the nearest link as the most optimal link, and aims to ensure the rapid and stable transmission of video data, avoid the video on demand failure caused by the overweight load of the link, or avoid the problem of overlarge on demand delay caused by the overlong link.
S204: sending the video data indicated in the on-demand instruction to the client in a streaming media mode through the optimal data transmission link;
the video-on-demand method and the system have the advantages that the video-on-demand method and the system are transmitted in a streaming media mode, the playing can be realized while transmitting, the playing does not need to be carried out after the whole video file is transmitted, and the time delay of video-on-demand is reduced.
S205: forwarding the on-demand instruction;
and if the video data requested in the request instruction is not stored in the current service node, forwarding the request instruction to other service nodes so as to find the service node where the video data is stored.
According to the video-on-demand method of the distributed monitoring system, after a service node in the distributed monitoring system receives a video-on-demand instruction, if the video requested by the video-on-demand instruction is local video data, an optimal transmission link is determined and transmitted to a client, if the video is remote video data, namely the video is not stored in the current service node, the video-on-demand instruction is forwarded, the work of the current service node is finished, and therefore the failure of video-on-demand can be avoided.
The video-on-demand method of another distributed monitoring system disclosed in the embodiment of the present invention is applied to any service node in the distributed monitoring system, and as shown in fig. 3, the method includes:
s301: receiving a request instruction of a user;
s302: judging whether the video data indicated in the on-demand instruction is local video data, if so, executing S303, and if not, executing S305;
s303: determining an optimal data transmission link between the current service node and the client according to a link selection rule;
the link selection rule is the same as that described in the above embodiments, and is not described again here.
S304: sending the video data indicated in the on-demand instruction to the client in a streaming media mode through the optimal data transmission link;
s305: determining an optimal service node forwarded by the on-demand instruction according to a service node selection rule;
s306: and forwarding the on-demand instruction to a target service node through the optimal service node forwarded by the on-demand instruction.
It should be noted that, when a video requested by a request instruction is not at a current service node, a current service node needs to forward the request instruction, and when forwarding the request instruction, the request instruction can be directly forwarded to a service node where the request video data is located. And taking the service node with the lightest load as the optimal service node. That is, the current service node forwards the on-demand instruction to the destination service node through the optimal service node.
It should be emphasized that, in this embodiment, when the current service node forwards the on-demand instruction to the destination service node, an instruction forwarding link from the current service node to the destination service node is established, when the destination service node sends video data, the instruction forwarding link may be used to forward the video data to the current service node, and then the current service node determines the optimal link by the above method to send the video data to the client, or the destination service node determines the optimal data sending link with the client by the above method to send the video data to the client.
The video-on-demand method of the distributed monitoring system described in this embodiment focuses on the process that the current service node forwards the on-demand instruction, and the forwarding of the on-demand instruction can also be performed by searching for the optimal service node, so that the data processing speed of the distributed monitoring system can be optimized.
The invention discloses a video-on-demand method of a distributed monitoring system, which is applied to two service nodes or a plurality of service nodes of the distributed monitoring system, and as shown in figure 4, the method comprises the following steps:
s401: a first service node receives a request instruction of a user;
s402: the first service node judges whether the video data indicated in the on-demand instruction is local video data, if so, S403 is executed, and if not, S405 is executed;
s403: the first service node determines an optimal data transmission link between the first service node and the client according to a link selection rule;
s404: the first service node sends the video data indicated in the on-demand instruction to the client through the optimal data transmission link in a streaming media mode;
s405: the first service node determines an optimal service node forwarded by the on-demand instruction according to the service node selection rule;
s406: and the first service node forwards the on-demand instruction to a target service node, namely a second service node through the optimal service node forwarded by the on-demand instruction.
S407: the second service node determines an optimal data transmission link between the current service node and the client according to a link selection rule;
in this embodiment, the link selection rule is the same as that in the above embodiment, and is not described here again.
S408: and the second service node sends the video data indicated in the on-demand instruction to the client in a streaming media mode through the optimal data transmission link.
In the video-on-demand method of the distributed monitoring system according to this embodiment, the first service node and the second service node both have the capability of selecting the optimal link for data transmission, and thus it can be ensured that the food data is sent to the client.
Further, the methods described in the above embodiments may also include:
and allocating transmission paths according to the priority of the users.
When a plurality of users simultaneously carry out video on-demand broadcasting, the optimal path of data transmission can be allocated to the users with high priority for use according to the preset priority of the users.
The video-on-demand device of the distributed monitoring system disclosed by the embodiment of the invention is applied to any service node in the distributed monitoring system, and as shown in fig. 5, the video-on-demand device comprises:
a receiving module 501, configured to receive a request instruction of a user;
a data transmission optimal link determining module 502, configured to determine, according to a link selection rule, an optimal link for data transmission with a client when the on-demand instruction meets a first condition;
a sending module 503, configured to send the video data indicated in the on-demand instruction to the client through the optimal data transmission link.
The working process of the device in this embodiment specifically is as follows:
after the receiving module receives a request instruction of a user, the data transmission optimal link determining module determines a data transmission optimal link between the current service node and the client according to a first condition and a link selection rule, and transmits data to the client through the data transmission optimal link.
As shown in fig. 6, a video-on-demand apparatus of another distributed monitoring system disclosed in the embodiment of the present invention includes:
a receiving module 601, configured to receive a request instruction of a user;
a calculating unit 602, configured to calculate a load of a link with the client; or, calculating a distance to a link between the client and the server;
a determining unit 603, configured to determine that the link with the smallest load or the shortest distance is an optimal link for data transmission;
a sending module 604, configured to send the video data indicated in the on-demand instruction to the client through the optimal data transmission link.
As shown in fig. 7, a video-on-demand apparatus of another distributed monitoring system disclosed in the embodiment of the present invention includes:
a receiving module 701, configured to receive a request instruction of a user;
a data transmission optimal link determining module 702, configured to determine, when the on-demand instruction satisfies a first condition, a data transmission optimal link with the client according to a link selection rule;
a sending module 703, configured to send the video data indicated in the on-demand instruction to the client through the optimal data transmission link.
A forwarding module 704, configured to forward the on-demand instruction when the on-demand instruction does not satisfy the first condition.
Specifically, the forwarding module may include:
the optimal service node determining unit is used for determining the optimal service node forwarded by the on-demand instruction according to the service node selection rule;
and the forwarding unit is used for forwarding the on-demand instruction to the target service node through the optimal service node forwarded by the on-demand instruction.
More specifically, the optimal serving node determining unit may include:
the computing subunit is used for computing the load of the service node;
and the determining subunit is used for determining the service node with the lightest load as the optimal service node.
In this embodiment, the computing unit and the computing subunit may be integrated or independently configured, for example, executed by the same computing chip; likewise, the determination unit and the determination subunit may be integrated or may be independent.
The video-on-demand device of the distributed monitoring system in the embodiment of the invention is arranged in any service node of the distributed monitoring system, so that the service node of the distributed monitoring system has the function of selecting the optimal video data sending link, and the video data can be sent to the client even if one service node or one data transmission link fails or has heavy load.
The embodiment of the invention also discloses a distributed monitoring system, which comprises:
and the service node is used for receiving a video-on-demand instruction of a user, determining an optimal data transmission link with the client according to a link selection rule when the video-on-demand instruction meets a first condition, and sending the video data indicated in the video-on-demand instruction to the client through the optimal data transmission link.
The distributed monitoring system according to this embodiment may include two or more service nodes, each service node has a function of selecting an optimal link for data transmission, a work flow of one service node is shown in fig. 2 or 3, and a working process of two service nodes in cooperation with each other is shown in fig. 4, which is not described herein again.
Compared with the existing distributed monitoring system, the distributed monitoring system of the embodiment has the advantages that the transmission links of the video data can be dynamically allocated, but not fixed links, and when one transmission link fails, the transmission of the video data cannot be influenced.
The functions described in the method of the present embodiment, if implemented in the form of software functional units and sold or used as independent products, may be stored in a storage medium readable by a computing device. Based on such understanding, part of the contribution of the embodiments of the present invention to the prior art or part of the technical solution may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computing device (which may be a personal computer, a server, a mobile computing device, a network device, or the like) to execute all or part of the steps of the method described in the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (13)
1. The video-on-demand method of the distributed monitoring system is characterized by comprising the following steps:
receiving a request instruction of a user;
when the on-demand instruction meets a first condition, determining an optimal data transmission link between the client and the on-demand instruction according to a link selection rule;
and sending the video data indicated in the on-demand instruction to the client through the optimal data transmission link.
2. The method of claim 1, wherein the link selection rule comprises:
taking the link with the lightest load with the client as an optimal link; or,
and taking the link closest to the client as the optimal link.
3. The method of claim 1 or 2, wherein the first condition comprises:
and the video data indicated in the on-demand instruction is local video data.
4. The method of claim 1, further comprising:
and when the on-demand instruction does not meet the first condition, forwarding the on-demand instruction.
5. The method of claim 4, wherein forwarding the on-demand instruction comprises:
determining an optimal service node forwarded by the on-demand instruction according to a service node selection rule;
and forwarding the on-demand instruction to a target service node through the optimal service node forwarded by the on-demand instruction.
6. The method of claim 5, wherein the service node selection rule comprises:
and taking the service node with the lightest load as the optimal service node.
7. The method according to claim 1, wherein the sending the video data indicated in the on-demand instruction to the client via the optimal data transmission link comprises:
and (4) a streaming media mode.
8. A video-on-demand apparatus for a distributed monitoring system, comprising:
the receiving module is used for receiving the on-demand instruction of the user;
the data transmission optimal link determining module is used for determining a data transmission optimal link between the client and the client according to a link selection rule when the on-demand instruction meets a first condition;
and the sending module is used for sending the video data indicated in the on-demand instruction to the client through the data transmission optimal link.
9. The apparatus of claim 8, wherein the data transmission optimal link determining unit comprises:
a calculating unit, configured to calculate a load of a link with the client; or, calculating a distance to a link between the client and the server;
and the determining unit is used for determining the link with the minimum load or the shortest distance as the optimal link for data transmission.
10. The apparatus of claim 8, further comprising:
and the forwarding module is used for forwarding the on-demand instruction when the on-demand instruction does not meet the first condition.
11. The apparatus of claim 10, wherein the forwarding module comprises:
the optimal service node determining unit is used for determining the optimal service node forwarded by the on-demand instruction according to the service node selection rule;
and the forwarding unit is used for forwarding the on-demand instruction to the target service node through the optimal service node forwarded by the on-demand instruction.
12. The apparatus of claim 11, wherein the optimal serving node determining unit comprises:
the computing subunit is used for computing the load of the service node;
and the determining subunit is used for determining the service node with the lightest load as the optimal service node.
13. A distributed monitoring system, comprising:
and the service node is used for receiving a video-on-demand instruction of a user, determining an optimal data transmission link with the client according to a link selection rule when the video-on-demand instruction meets a first condition, and sending the video data indicated in the video-on-demand instruction to the client through the optimal data transmission link.
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