CN111934900A - Emergency system and method for switching intermediate frequency through modulator - Google Patents
Emergency system and method for switching intermediate frequency through modulator Download PDFInfo
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- CN111934900A CN111934900A CN202010589008.1A CN202010589008A CN111934900A CN 111934900 A CN111934900 A CN 111934900A CN 202010589008 A CN202010589008 A CN 202010589008A CN 111934900 A CN111934900 A CN 111934900A
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000012544 monitoring process Methods 0.000 claims description 9
- 230000008054 signal transmission Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
- H04L41/0668—Management of faults, events, alarms or notifications using network fault recovery by dynamic selection of recovery network elements, e.g. replacement by the most appropriate element after failure
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1095—Replication or mirroring of data, e.g. scheduling or transport for data synchronisation between network nodes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
- H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
- H04M11/062—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors using different frequency bands for speech and other data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/20—Adaptations for transmission via a GHz frequency band, e.g. via satellite
Abstract
The invention provides an emergency system and method for switching intermediate frequency through a modulator, which comprises a main system and two sets of redundancy systems, wherein the main system and the two sets of redundancy systems are mutually independent; the network switcher is respectively connected with the modulators on the main road system and the redundant system; the network switch includes a switching key for switching between the modulators of the main and redundant systems. The modulator has a dual-network structure, and comprises a first network interface and a second network interface which are respectively connected with a set of network switches. The modulator is switched on and off through the switching key on the network switcher, switching between the main system and the redundant system is achieved, emergency of the equipment level is achieved, and the emergency speed is improved while the modulator is more effective, more stable and more reliable compared with the prior art. The two sets of network switchers realize the parallel control of the modulators and realize the emergency of the network layer.
Description
Technical Field
The invention relates to the field of satellite antenna equipment, in particular to an emergency system and method for switching intermediate frequency through a modulator.
Background
In the process of playing satellite television programs, if a broadcasting link fails, a whole set of emergency operation needs to be completed in a very short time, a common emergency method in the prior art is to arrange a plurality of satellite broadcasting devices, the satellite broadcasting devices have an independent system relative to the currently used satellite broadcasting devices, a mechanical changeover switch is added to an intermediate frequency modulator on a transmission link of each satellite broadcasting device, and linkage control is performed to ensure that only one set of satellite broadcasting devices are on-line broadcast at the same time and the rest satellite broadcasting devices are in a hot standby state. When a satellite broadcasting device on broadcasting fails, a pilot quickly switches the satellite broadcasting device in a hot standby state to be broadcasted to an online broadcasting state through a mechanical changeover switch, thereby realizing emergency operation, specifically as shown in fig. 1, the satellite broadcasting device comprises a main system (1) and two redundant systems (2), the main system (1) is provided with at least two modulators (4) which are respectively a main modulator (4a) and a standby modulator (4b), the two redundant systems (2) are respectively provided with one modulator (4), the main system (1) is firstly used for hot broadcasting under normal conditions, the main modulator (4a) is a currently opened one, and the standby modulator (4b) is an unused one as standby. The main system (1) and the redundant system (2) are switched on and off by controlling the coaxial reversing switch through a remote control button, so that emergency switching is realized.
However, the mechanical switch in the prior art is usually a coaxial switch with a pure mechanical structure, although the coaxial switch is used to increase the emergency speed and the broadcast error rate is low, the frequency of the coaxial switch itself having a fault is high, and the coaxial switch may cause signal attenuation, increase or decrease the processing pressure of the back-end equipment at the output end of the modulator, and the linked coaxial switch is managed by a single controller, and becomes a key equipment of a single node in the satellite broadcast equipment, resulting in poor system stability.
Disclosure of Invention
The invention provides an emergency system and method for switching intermediate frequency through a modulator, and aims to solve the technical problem that an emergency mode in the prior art is unreliable and unstable. The invention is realized by the following technical scheme.
An emergency system for switching an intermediate frequency via a modulator, comprising:
the main system and the two sets of redundancy systems are mutually independent;
the main system and the redundant system both comprise a modulator and a signal transmission line connected through the modulator;
a network switch, which comprises a connecting line respectively connected with each modulator (4);
the network switch includes a switch key for switching,
the switching key (31) is used for controlling the on and off of the modulator so as to realize the switching between the main system (1) and the redundant system (2). .
Further, the network switch further comprises:
the control module is connected with the switching key and used for establishing connection with the corresponding modulator by using the network switcher when the switching key is pressed to switch to the corresponding modulator;
the monitoring module is connected with the control module and used for sending a state acquisition command to acquire the working state information of the modulator in a preset time period;
the judging module is connected with the monitoring module and used for judging whether the modulator has faults or not according to the working state information of the modulator;
and the warning module is connected with the judging module and used for sending warning information to inform emergency personnel when the modulator fails.
Further, the warning module is an emergency indicator lamp.
Further, the network switch and the modulator are connected through a wired network.
Further, each modulator comprises a first network interface and a second network interface respectively;
the emergency system also comprises two sets of network switchers, wherein the first network interface is connected with one set of network switcher, and the second network interface is connected with the other set of network switcher;
two sets of network switches are used to control the modulators in parallel.
Furthermore, the emergency system also comprises a first network switch and a second network switch, wherein the first network interface is connected with one set of network device switcher through the first network switch; the second network interface is connected with another set of network switch through a second network switch.
Further, the network switch further comprises:
the clock acquisition module is connected with the control module and used for sending a clock synchronization request to an external server so as to acquire real-time clock information in the server;
and the clock synchronization module is respectively connected with the clock acquisition module and the monitoring module and is used for synchronizing the time of the network switcher and the server according to the real-time clock information.
Further, the network switch also comprises a status indication module connected with the control module, and the status indication module is used for indicating the on and off states of the modulators on the main road system and the redundant system.
An emergency method for switching an intermediate frequency through a modulator is characterized in that the emergency system for switching the intermediate frequency through the modulator is used, and specifically comprises the following steps:
step A1, when the switch button of the network switch is pressed to switch to the corresponding modulator, the connection line between the network switch and the corresponding modulator is used;
step A2, the network switch sends a status acquisition command to acquire the working status information of the modulator in a preset time period;
step A3, the network switch judges whether the modulator has a fault according to the working state information of the modulator;
step A4, when the modulator fails, the network switch sends out warning information to inform emergency personnel.
Further, the method also comprises the following steps:
step A5, the network switch sends a clock synchronization request to the external server to obtain the real-time clock information in the server;
in step a6, the network switch performs time synchronization according to the real-time clock information.
The beneficial technical effects of the invention are as follows:
the modulators of the main system and the redundant system are connected with the network switcher, and the modulators are switched on and off through the switching keys on the network switcher, so that the switching between the main system and the redundant system is realized, the emergency of the equipment level is realized, the emergency speed is improved, and the system is more effective, more stable and more reliable compared with the prior art.
In addition, each modulator on the main system and the redundant system is of a dual-network structure, is provided with a first network interface and a second network interface, is respectively connected with a set of network switches corresponding to each modulator, and realizes the parallel control of the modulators by the two sets of network switches so as to realize the emergency of a network layer.
Drawings
FIG. 1 is a diagram of a prior art controller for switching intermediate frequencies via a modulator;
fig. 2 is a schematic diagram of an emergency system for switching an intermediate frequency through a modulator according to the present invention;
fig. 3 is a schematic diagram of an emergency system network switch for switching an intermediate frequency through a modulator according to the present invention;
FIG. 4 is a schematic diagram of the connection of dual network interfaces of the modulator of the emergency system for switching the intermediate frequency through the modulator according to the present invention;
FIG. 5 is a flowchart illustrating the general steps of an emergency method for switching an intermediate frequency via a modulator according to the present invention;
fig. 6 is a flowchart illustrating clock synchronization steps of a network switch in an emergency method for switching an intermediate frequency through a modulator according to the present invention.
Detailed Description
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.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
Referring to fig. 2 to 4, an emergency system for switching an intermediate frequency by a modulator according to the present invention includes:
the system comprises a main road system (1) and two sets of redundancy systems (2), wherein the main road system (1) and the two sets of redundancy systems (2) are mutually independent;
the main system (1) and the redundant system (2) both comprise a modulator (4) and a signal transmission line connected by the modulator;
the network switch (3), the network switch (3) is connected with the modulator (4) on the main road system (1) and the redundant system (2) respectively; the network switch (3) comprises a connection line connected to each modulator (4) respectively
The network switch (3) comprises a switch button (31), the switch button (31) being used to switch between the modulators (4) of the main system (1) and the redundant system (2). The switching key (31) is used for controlling the on and off of the modulator so as to realize the switching between the main system (1) and the redundant system (2).
Further, the network switch (3) further comprises:
the control module (32) is connected with the switching key (31) and is used for controlling the network switcher (3) to establish connection with the corresponding modulator (4) when the switching key (31) is pressed to switch to the corresponding modulator (4); to use the connection between the network switch (3) and the corresponding modulator (4).
The monitoring module (33) is connected with the control module (32) and used for sending a state acquisition command to acquire the working state information of the modulator in a preset time period;
the judging module (34) is connected with the monitoring module (33) and used for judging whether the modulator has faults or not according to the working state information of the modulator;
and the warning module (35) is connected with the judging module (34) and is used for sending warning information to inform emergency personnel when the modulator fails.
Further, the warning module (35) is an emergency indicator lamp.
Further, the network switch (3) and the modulator (4) are connected through a wired network.
Further, each modulator (4) comprises a first network interface (41) and a second network interface (42), respectively;
the emergency system also comprises two sets of network switches (3), wherein the first network interface (41) is connected with one set of network switch (3), and the second network interface (42) is connected with the other set of network switch (3);
two sets of network switches (3) are used for controlling the modulators (4) in parallel.
Furthermore, the emergency system also comprises a first network switch (51) and a second network switch (52), wherein the first network interface (41) is connected with one set of network device switches (3) through the first network switch (51); the second network interface (42) is connected to a further network switch (3) via a second network switch (52).
Further, a server (6) is connected to the first network switch (51) and thereby to the network switch (3) connected to the first network switch (51).
Further, the network switch (3) connected to the server (6) further comprises:
the clock acquisition module (36) is connected with the control module (32) and used for sending a clock synchronization request to an external server (6) so as to acquire real-time clock information in the server (6);
and the clock synchronization module (37) is respectively connected with the clock acquisition module (36) and the monitoring module (33) and is used for enabling the network switcher (3) and the server (6) to carry out time synchronization according to the real-time clock information.
Further, the network switch (3) further comprises a status indication module (38) connected to the control module (32), wherein the status indication module (37) is used for indicating the on and off status of the modulator (4) on the main system (1) and the redundant system (2).
Referring to fig. 5, the present invention further provides an emergency method for switching an intermediate frequency through a modulator, which is characterized in that the emergency system for switching an intermediate frequency through a modulator is used, and specifically includes the following steps:
step A1, when the switch key (31) of the network switch (3) is pressed to switch to the corresponding modulator (4), the network switch (3) establishes connection with the corresponding modulator (4); connection lines between the network switches (3) and the corresponding modulators (4) are used.
Step A2, the network switch (3) sends a state acquisition command to acquire the working state information of the modulator in a preset time period;
step A3, the network switcher (3) judges whether the modulator has a fault according to the working state information of the modulator;
step A4, when the modulator is out of order, the network switch (3) sends out alarm information to inform emergency personnel.
Further, referring to fig. 6, the method further includes the following steps:
step A5, the network switch (3) sends a clock synchronization request to the external server (6) to obtain the real-time clock information in the server (6);
in step A6, the network switch (3) performs time synchronization according to the real-time clock information.
In the invention, a network switcher is used for controlling the on and off of a modulator (4) to replace the function of a coaxial switch, so that the switching between a redundant system (2) and a main system (1) is realized, when the modulator (4) of the main system (1) for hot broadcasting fails, warning information is sent out, emergency personnel can operate a switching key (31) on the network switcher (3) in time to switch the switching key to the modulator (4) of the redundant system (2), and the connection is established with the modulator (4) of the redundant system (2), so that the redundant system (2) can continuously broadcast signals, the same function as the coaxial switch is realized, the signal attenuation caused by the coaxial switch serving as a mechanical control structure is avoided, and the stability of the whole satellite broadcasting system is improved.
Meanwhile, the network switcher (3) of the invention also comprises a display which can display the working state of the modulator, when the other equipment on the data transmission link of one of the redundancy system (2) and the main system (1), such as the high power amplifier (10) and the up-conversion (9), which is taken as a hot broadcasting system, fails, the problem that the modulator cannot receive signals and the like can be caused, the display can correspondingly indicate that the display has a black screen and the like, when the other equipment on the data transmission link, such as the high power amplifier (10) and the up-conversion (9), fails, and an emergency person can still press the switching key (31) to switch between the main system (1) and the redundancy system (2) when receiving failure information, so as to realize emergency at the equipment level.
The main system (1) usually has two modulators (4), one as the main modulator (4a) and one as the spare modulator (4b), the main up-conversion (9a) and the main high power amplifier (110a) are arranged on the data transmission link of the main modulator (4a), and the spare up-conversion (9b) and the spare high power amplifier (110b) are arranged on the data transmission link of the spare modulator (4 b). Automatic switching between the primary modulator (4a) and the secondary modulator (4b) is achieved in the existing manner.
Preferably, the monitor module (52) sends a status acquisition command once every 300 milliseconds.
Preferably, the control module (32) sends an SNMP command to the modulator (4) to establish a UDP connection with the modulator (4).
In the invention, two sets of network switches are used simultaneously, each modulator (4) is provided with two network interfaces, namely a first network interface (41) and a second network interface (42), which are respectively connected to one set of network switches (3), for example, the first network interface (41) is connected to the network switch (3a), the second network interface (42) is connected to the network switch (3b), and the two sets of network switches (3) are used for controlling the modulators (4) in parallel, so that the single-node risk of network rushing is avoided, and the redundancy of a network layer is realized.
According to the emergency system and the method for switching the intermediate frequency through the modulator, redundancy of a network level and an equipment level is achieved, signal attenuation caused by a mechanical control structure is avoided, single-node risks faced by network rushing are avoided, and the overall stability of a broadcasting system is improved.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (10)
1. An emergency system for switching an intermediate frequency via a modulator, comprising:
the system comprises a main road system (1) and two sets of redundancy systems (2), wherein the main road system (1) and the two sets of redundancy systems (2) are mutually independent;
the main system (1) and the redundant system (2) each comprise a modulator (4) and a signal transmission line connected via the modulator;
the network switch (3), the said network switch (3) includes the connecting line connected with each said modulator (4) separately;
the network switcher (3) comprises a switching key (31), and the switching key (31) is used for controlling the on and off of a modulator so as to realize switching between the main road system (1) and the redundant system (2).
2. An emergency system for switching an intermediate frequency by means of a modulator according to claim 1, characterized in that the network switch (3) further comprises:
a control module (32) connected to the switch key (31) for using the connection line between the network switch (3) and the corresponding modulator (4) when the switch key (31) is pressed to switch to the corresponding modulator (4);
the monitoring module (33) is connected with the control module (32) and used for sending a state acquisition command to acquire the working state information of the modulator in a preset time period;
the judging module (34) is connected with the monitoring module (33) and used for judging whether the modulator fails according to the working state information of the modulator;
and the warning module (35) is connected with the judging module (34) and is used for sending warning information to inform emergency personnel when the modulator fails.
3. An emergency system for switching an intermediate frequency by means of a modulator according to claim 2, characterized in that the warning module (35) is an emergency light.
4. An emergency system for switching an intermediate frequency by means of a modulator according to claim 1, characterized in that the network switch (3) and the modulator (4) are connected by means of a wired network.
5. Emergency system for switching an intermediate frequency by means of a modulator according to claim 2, characterized in that each of said modulators (4) comprises a first network interface (41) and a second network interface (42), respectively;
the emergency system also comprises two sets of the network switches (3), wherein the first network interface (41) is connected with one set of the network switches (3), and the second network interface (42) is connected with the other set of the network switches (3);
two sets of the network switches (3) are used for controlling the modulators (4) in parallel.
6. An emergency system for switching an intermediate frequency by a modulator according to claim 5, further comprising a first network switch (51) and a second network switch (52), wherein the first network interface (41) is connected to one of the set of said network switch (3) via the first network switch (51); the second network interface (42) is connected with another set of the network switch (3) through the second network switch (52).
7. An emergency system for switching an intermediate frequency by means of a modulator according to claim 2, characterized in that the network switch (3) further comprises:
the clock acquisition module (36) is connected with the control module (32) and used for sending a clock synchronization request to an external server (6) so as to acquire real-time clock information in the server (6);
and the clock synchronization module (37) is respectively connected with the clock acquisition module (36) and the monitoring module (33) and is used for carrying out time synchronization on the network switcher (3) and the server (6) according to the real-time clock information.
8. An emergency system for switching an intermediate frequency by means of a modulator according to claim 2, characterized in that the network switch (3) further comprises a status indication module (38) connected to the control module (32), the status indication module (37) being adapted to indicate the on and off status of the modulator (4) on the main system (1) and the redundant system (2).
9. An emergency method for switching an intermediate frequency by a modulator, using an emergency system for switching an intermediate frequency by a modulator according to any one of claims 1 to 8, comprising the steps of:
a step a1 of using the connection line between the network switch (3) and the corresponding modulator (4) when the switch key (31) of the network switch (3) is pressed to switch to the corresponding modulator (4);
step A2, the network switch (3) sends a state acquisition command to acquire the working state information of the modulator in a preset time period;
step A3, the network switcher (3) judges whether the modulator has a fault according to the working state information of the modulator;
step A4, when the modulator is in fault, the network switch (3) sends out warning information to inform emergency personnel.
10. An emergency method for switching an intermediate frequency by a modulator according to claim 9, further comprising the steps of:
step A5, the network switch (3) sends a clock synchronization request to the external server (6) to obtain the real-time clock information in the server (6);
step A6, the network switch (3) performs time synchronization according to the real-time clock information.
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| CN202010589008.1A CN111934900A (en) | 2020-06-24 | 2020-06-24 | Emergency system and method for switching intermediate frequency through modulator |
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| CN202010589008.1A CN111934900A (en) | 2020-06-24 | 2020-06-24 | Emergency system and method for switching intermediate frequency through modulator |
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Application publication date: 20201113 |
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| RJ01 | Rejection of invention patent application after publication |