Patent Application
20240305520
The present application relates to the technical field of digital broadcasting network transmission, and particularly relates to a hot backup switching method and system based on network card detection.
With the development of digital network broadcasting industry, the fields and scales involved by the digital network broadcasting industry are expanded, and many new broadcasting projects begin to use digital network audio broadcasting instead of traditional analog audio broadcasting. At the same time, some projects and fields have high requirements for stability and reliability of broadcasting systems. However, due to design limitations and hardware performance limitations of general network broadcasting equipment, it is difficult to ensure audio playback stability and reliability of systems, resulting in that the fields having high requirements for stability and reliability are blocked out. Especially for a sudden failure, e.g., when a server connected with an external signal source has an unexpected accident, it basically means that the entire broadcasting system enters a paralysis state. Communication fault detection and other means are usually used to avoid faults when performing important broadcasting tasks such as listening test and station announcement. However, communication fault detection in conventional settings will consume a lot of server resources; the higher the requirement for a communication fault detection result is, the more the server fluency and sound quality will be affected, so that the system is prone to instability during operation.
To overcome the defects in the prior art, one purpose of the present application is to provide a hot backup switching method based on network card detection, which can solve the problem that communication fault detection in conventional settings will consume a lot of server resources, and the server fluency and sound quality will be affected, so that the system is prone to instability during operation.
Another purpose of the present application is to provide a hot backup switching system based on network card detection, which can solve the problem that communication fault detection in conventional settings will consume a lot of server resources, and the server fluency and sound quality will be affected, so that the system is prone to instability during operation.
To achieve the one of the above purposes, the present application adopts the following technical solution:
A hot backup switching method based on a network card detection, comprising the following steps:
Preferably, the method further comprises a GPS module used for satellite time service, and both the master server device and the slave server device are connected with the GPS module.
Preferably, the slave server device comprises the first synchronous network card and a slave server used for connecting with an audio source, the master server device comprises the second synchronous network card and a master server used for connecting with the audio source, the master server and the slave server are connected through the first synchronous network card and the second synchronous network card, and the first synchronous network card and the second synchronous network card are connected with the playback terminal.
Preferably, before the step S1, the method further comprises the following steps:
Preferably, the step S1 is specifically implemented by the following steps:
Preferably, the step S4 is specifically implemented by the following steps:
Preferably, the working mode of the playback terminal is either a master mode in playback state or an idle mode in idle state.
To achieve the other of the above purposes, the present application adopts the following technical solution:
Preferably, the system further comprises a GPS module used for satellite time service, and both the master server and the slave server are connected with the GPS module.
Compared with the prior art, the present application has the following beneficial effects: dual-server hot backup switching detection is carried out by the first synchronous network card and the second synchronous network card to avoid the impact of non-timeliness and computing efficiency of the servers, and high-speed dual-server hot backup switching is realized by the advantages of the hardware to reduce resource occupation of servers, so that the fluency and stability of the servers are ensured; further, the GPS module is used to provide time service for the master server device and the slave server device synchronously to synchronize timestamps of the master server device and the slave server device, and the same audio frame is played back at the same timestamp to realize audio synchronization, so that seamless switching of audio playback can be realized during the dual-server hot backup switching of the system, and a reliable and stable network broadcasting function is provided for the system.
Preferred embodiments of the present application will be explained below in detail in combination with drawings. It should be understood that the preferred embodiments described below are only used for describing and explaining the present application, but are not used for limiting the present application.
It should be noted in the description of the present application that terms such as “central”, “upper”, “lower”, “left”, “right”, “vertical”, “horizontal”, “inner”, “outer”, etc. indicate direction or position relationships shown based on the drawings, and are only intended to facilitate the description of the present application and the simplification of the description rather than to indicate or imply that the indicated device or element must have a specific direction or constructed and operated in a specific direction, and therefore, shall not be understood as a limitation to the present application. In addition, the terms such as “first”, “second” and “third” are only used for the purpose of description, rather than being understood to indicate or imply relative importance.
It should be noted in the explanation of the present application that, unless otherwise specifically regulated and defined, terms such as “installation,” “connected,” and “connecting” shall be understood in broad sense, and for example, may refer to fixed connection or detachable connection or integral connection, may refer to mechanical connection or electrical connection, and may refer to direct connection or indirect connection through an intermediate medium or inner communication of two elements. For those ordinary skilled in the art, the specific meanings of the above terms in the present application may be understood according to specific conditions.
The present application is further described below in combination with drawings and specific embodiments.
In the present application, both the master server device and the slave server device are in double-layer settings; preferably, the slave server device comprises the first synchronous network card and a slave server used for connecting with an audio source, the master server device comprises the second synchronous network card and a master server used for connecting with the audio source, the master server and the slave server are connected through the first synchronous network card and the second synchronous network card, and the first synchronous network card and the second synchronous network card are connected with the playback terminal. Both the master server and the slave server are embedded platforms, both the first synchronous network card and the second synchronous network card are USB gigabit network cards, and a schematic diagram thereof is shown in
As shown in
Preferably, a terminal configuration tool can be used to search for the devices and configure the IP address of each device (the address of the master server device and the address of the slave server device) in a network broadcasting mode, so that after the first synchronous network card is configured by the configuration tool, the IP address of the second synchronous network card is directly obtained, and the target IP address can be queried directly.
Specifically, if the first synchronous network card can obtain the current IP address of the second synchronous network card within 5 seconds, establishing the communication channel between the first synchronous network card and the second synchronous network card to perform hot backup detection; preferably, the method further comprises a GPS module used for satellite time service, and both the master server device and the slave server device are connected with the GPS module; after establishing the communication channel between the first synchronous network card and the second synchronous network card, driving the GPS module to provide time service for the master server device and the slave server device synchronously, and obtaining timestamps by GPS time service; the timestamp deviation between the master server device and the slave server device shall not be more than 20 us, so as to ensure that the same audio frame is played back at the same timestamp by the master server and the slave server. if the first synchronous network card cannot obtain the current IP address of the second synchronous network card within 5 seconds, the first synchronous network card sending a working mode query instruction to the playback terminal by to query the working mode of the playback terminal, so as to determine whether the master server device is still in normal working.
Specifically, if the first synchronous network card cannot obtain the current IP address of the second synchronous network card within 5 seconds, querying the working mode of the playback terminal; preferably, the working mode of the playback terminal is either a master mode in playback state or an idle mode in idle state; if the playback terminal is still in the master mode at present, it indicates that the master server device is still in a normal working state, so that the first synchronous network card is driven to start to search for the address of the master server device again; if the playback terminal is still in the idle mode at present, it indicates that the playback terminal has no playback task, and the master server device has a high probability of failure, so that the slave server device is marked as the master server device to replace the original master server device to manage and control the system.
Specifically, after establishing a communication channel between the master server device and the slave server device, the first synchronous network card will send heartbeat packets to the second synchronous network card periodically to ensure the state of the master server device; it should be noted that the heartbeat packets and the response packet are sent and received by the first synchronous network card and the second synchronous network card without the intervention of the master server or the slave server; in the embodiment, the step S1 is specifically implemented by the following steps:
Specifically, providing synchronous satellite time service in advance to drive the master server device and slave server device to play back the same audio frame simultaneously, so as to ensure seamless audio switching.
Specifically, sending the audio from the audio source to the playback terminal by the master server through the second synchronous network card to enable the playback terminal to play back the audio; at the same time, the audio frame played back by the slave server are cut off by the first synchronous network card and will not be distributed.
Specifically, sending query instructions (heartbeat packets) to the second synchronous network card every 1 millisecond by the first synchronous network card; after the query instructions sent by the first synchronous network card are received by the second synchronous network card, sending a response packet to the first synchronous network card to ensure the state of the master server device.
Specifically, if no response packet sent by the second synchronous network card is received by the first synchronous network card in a continuous 5-millisecond period, sending a working mode query instruction by the playback terminal to verify the current state of the master server device and realize hot backup switching; if response packets sent by the second synchronous network card are received by the first synchronous network card in a continuous 5-millisecond period, executing S1 again, and sending the query instructions (heartbeat packets) to the second synchronous network card every 1 millisecond.
Specifically, when the working mode query instructions sent by the first synchronous network card are received by the playback terminal, sending the working mode (master mode or idle mode) of the playback terminal to the first synchronous network card; when the working mode of the playback terminal is the idle mode, a slave server device sending a switching instruction to the playback terminal and replacing the original master server device to manage and control the system; when the working mode of the playback terminal is the master mode, driving the playback terminal to continuously send 3 query instructions to the master server device to further verify the current state of the master server device; the whole switching and detection process is carried out by the underlying network cards without the involvement of the upper-layer embedded platforms, so that the hot backup switching of the slave server device can be completed within 10 milliseconds, the playback terminal device is detected and confirmed, and the reliability and timeliness of the system are ensured by the dual detection mechanism.
Specifically, if the second synchronous network card responds to the query instructions of the playback terminal, it indicates that the master server device still works normally; if the second synchronous network card cannot respond to the query instructions of the playback terminal, it indicates that the master server device may be offline; in the embodiment, the step S4 is specifically implemented by the following steps:
Specifically, if the second synchronous network card cannot respond to the query instructions of the playback terminal, it indicates that the master server device may be offline; at the same time, hot backup switching of the slave server is carried out to take over the system, the audio frame data played back on the slave server is distributed by the first synchronous network card to the playback terminal device to replace the master server device for continued playback.
As shown in
For those skilled in the art, various other corresponding changes and modifications can be made according to the technical solution and concept described above, and all these changes and modifications should fall within the protection scope of the claims of the present application.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202111357296.9 | Nov 2021 | CN | national |
This application is a Continuation of co-pending International Application No. PCT/CN2022/117470, filed on Sep. 7, 2022, for which priority is claimed under 35 U.S.C. § 120; and this application claims priority of Application No. 202111357296.9 filed in China on Nov. 16, 2021 under 35 U.S.C. § 119; the entire contents of all of which are hereby incorporated by reference.
| Number | Date | Country | |
|---|---|---|---|
| Parent | PCT/CN2022/117470 | Sep 2022 | WO |
| Child | 18665166 | US |
