CN106603305B - IP code stream hot backup switching system - Google Patents
IP code stream hot backup switching system Download PDFInfo
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- CN106603305B CN106603305B CN201611262024.XA CN201611262024A CN106603305B CN 106603305 B CN106603305 B CN 106603305B CN 201611262024 A CN201611262024 A CN 201611262024A CN 106603305 B CN106603305 B CN 106603305B
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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
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/22—Alternate routing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/24—Monitoring of processes or resources, e.g. monitoring of server load, available bandwidth, upstream requests
- H04N21/2405—Monitoring of the internal components or processes of the server, e.g. server load
Abstract
The invention relates to an IP code stream hot backup switching system, which at least comprises a main equipment group and a standby equipment group, wherein the main equipment group comprises main equipment and first standby equipment; the standby equipment group comprises second standby equipment and third standby equipment; the switching module is used for receiving the main code stream, the first standby code stream, the second standby code stream and the third standby code stream and switching the main code stream to each standby code stream signal according to the monitored fault type of the main code stream signal; the main signal source input end module is used for receiving a main signal source, transmitting the main signal source to a first data input port of the switching module and establishing a data routing relation with the main and standby equipment; and the standby signal source input end module is used for receiving the standby signal source, transmitting the standby signal source to the second data input port of the switching module and establishing a data routing relation with the standby equipment. The system realizes automatic switching directly through the switcher when the signal source has a problem.
Description
Technical Field
The invention relates to the technical field of digital front-end, in particular to an IP (Internet protocol) and code stream hot backup switching system of digital television front-end equipment.
Background
The IP digital television front-end equipment can be applied to the fields of broadcasting and video on demand, the service quality requirements of the fields are high, and the whole system can stably and reliably operate for 7 × 24 hours, namely, the code stream transmitted to an interrupted user cannot have any interruption and packet loss. When a system is actually deployed, core code stream processing equipment of the system is required to adopt dual-computer hot backup; this requires that both the primary and standby devices receive at the same time. The IP code stream hot backup switch disclosed in patent 102215134a includes a digital signal processing logic unit and a plurality of gigabit ethernet interfaces, where the ethernet interfaces include a data input port and a data output port, and further include at least one monitoring port, where the monitoring port is used to collect the operating states of each external core code stream processing device; the data routing and exchange processing inside the backup change-over switch is realized.
In the technical scheme, the IP digital television code stream data which is input from the beginning is sent to the data input port of the switcher through the digital switch by each source class (satellite/cable/ground/optical network code stream receiver converter). However, neither the patent scheme nor the prior art provides a simple and easy method to realize automatic switching directly through a switcher when a signal source has a problem; that is, the monitoring mode of the switch does not directly monitor the signal source. In addition, the conventional code stream switcher has insufficient comprehensive fault prompting, and is not beneficial to the input and output of a signal source.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and designs an IP code stream hot backup switching system, which provides a simple and feasible method for realizing automatic switching directly through a switcher when a signal source has a problem.
In order to achieve the above object, the technical solution adopted by the present invention is an IP salix hot backup switching system, which at least comprises:
the master and standby equipment group comprises master equipment and first standby equipment which are respectively and correspondingly used for inputting a first master code stream and a first standby code stream value to the replacing module;
the standby equipment group comprises second standby equipment and third standby equipment which are respectively and correspondingly used for inputting a second standby code stream and a third standby code stream to the switching module;
the switching module is used for receiving the main code stream, the first standby code stream, the second standby code stream and the third standby code stream and switching the main code stream to each standby code stream signal according to the monitored fault type of the main code stream signal;
the main signal source input end module is used for receiving a main signal source, transmitting the main signal source to a first data input port of the switching module and establishing a data routing relation with the main and standby equipment;
and the standby signal source input end module is used for receiving the standby signal source, transmitting the standby signal source to the second data input port of the switching module and establishing a data routing relation with the standby equipment.
The signal sources of the main signal source input end module and the standby signal source input end module are different signal sources, and the signal sources comprise optical fiber, microwave and satellite program signal sources.
In a preferred scheme, the data routing relationship is specifically: the data received by the RX pin of the first data input port is cached in a receiving FIFO inside the RX pin, and then is sent to the TX pins of the two first data output ports of the switching module, so that data copying is realized; the two first data input ports respectively input data into the main equipment and the first standby equipment;
the data received by the RX pin of the second data input port is cached in a receiving FIFO inside the RX pin, and then is sent to the TX pins of two second data output ports of the switching module, so that data replication is realized; and the two second data input ports input data into the second standby equipment and the third standby equipment respectively.
Further, the TX pins of the four data output ports of the active device and each standby device send the processed data to the RX pins of the data input ports of the switching module, and the four data are switched in the switching module by the multi-way switch.
In a preferred embodiment of the present invention, the system further includes a fault monitoring module, which obtains data information of each device through the monitoring port, and sends a status data packet to the switching module at regular time, and at the same time, can know whether the active/standby device and the standby device are working normally, and control the data switch to select the active port or each standby port.
Further, the fault monitoring module further obtains signal source data of the first data input port and the second data input port through the monitoring port, and controls the data switch to select the main/standby device port or the standby device port according to the set normal condition and abnormal condition of the working state.
In a specific preferred embodiment, the fault monitoring module includes an optical fiber signal detection unit, the optical fiber signal detection unit preprocesses the received optical fiber signal, and detects whether the optical signal and the carrier are correct through an optical signal detection chip, and the fault detection module determines whether to immediately switch between the main/standby device data and the standby device data according to a detection result.
In another specific preferred scheme, the fault monitoring module includes a satellite signal detection unit, the satellite signal detection unit counts video line synchronization signals after video signals output by the satellite receiver are separated by the synchronization separation circuit, whether the satellite signal source is normal or not is judged according to the rule of the number of lines of a video signal frame, and the fault detection module judges whether to immediately switch between the data of the main equipment and the data of the standby equipment according to a detection result.
In another preferred scheme, the system further comprises a fault indication module, wherein the fault indication module comprises fault indications of the active device and each standby device and a fault indication of the signal source input end;
the fault indications of the main equipment and each standby equipment are specifically a signal loss indication, a synchronization loss indication and a PID loss error indication;
the signal source input end fault indication is an error and loss indication of the signal source.
The code stream switching system of the invention sets the fault monitoring and switching of the signal source into the switcher, so that the fault monitoring and switching of the signal source and the signal transmission processing monitoring are integrated into a system, the switching system at least has the direct switching of two signal sources, and at least one time of standby code stream is increased in the implementation process; compared with the prior art of switching signals at the signal source end, the switching is smoother, and the program watching of a user is not influenced.
In the prior art, the same code stream signal is adopted in the main path and the standby path, and once the satellite signal has a problem, the code stream signals of the main path and the standby path have problems, so that the watching of a user is influenced; the switching system of the invention sets the code stream switching of the main equipment and the standby equipment through the code stream signals of various signal sources, solves the problems, and simultaneously realizes automatic switching and has better intelligence compared with the prior art that one signal source is switched to another signal source when a problem occurs.
Drawings
FIG. 1 is a schematic structural diagram of an IP code stream hot backup switching system according to an embodiment of the present invention
Fig. 2 is a logic block diagram of data routing according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
The invention discloses an IP code stream hot backup switching system, which at least comprises the following modules: the master and standby equipment group comprises master equipment and first standby equipment which are respectively and correspondingly used for inputting a first master code stream and a first standby code stream value to the replacing module; the standby equipment group comprises second standby equipment and third standby equipment which are respectively and correspondingly used for inputting a second standby code stream and a third standby code stream to the switching module; the switching module is used for receiving the main code stream, the first standby code stream, the second standby code stream and the third standby code stream and switching the main code stream to each standby code stream signal according to the monitored fault type of the main code stream signal; the main signal source input end module is used for receiving a main signal source, transmitting the main signal source to a first data input port of the switching module and establishing a data routing relation with the main and standby equipment; and the standby signal source input end module is used for receiving the standby signal source, transmitting the standby signal source to the second data input port of the switching module and establishing a data routing relation with the standby equipment. The main equipment and the standby equipment in the equipment group are not fixed and can be exchanged with each other and are main and standby with each other; similarly, the input end of the main signal source and the input end of the standby signal element are not fixed, and can be exchanged with each other, so as to be used as the main and standby signal sources.
Of course, based on the design idea of the present invention, the number of the input ports of the standby signal source may be one or more, even each port fixedly inputs a fixed signal source type; and correspondingly, a plurality of spare equipment groups are added. Of course, in this embodiment, the number of input ports of the standby signal source is preferably 1-2.
In a specific embodiment, the IP code stream hot backup switching system, as shown in fig. 1, includes the following modules:
the main and standby equipment group comprises main equipment and first standby equipment which are respectively and correspondingly used for inputting a first main code stream and a first standby code stream value to the replacing module.
And the standby equipment group comprises second standby equipment and third standby equipment which are respectively and correspondingly used for inputting the second standby code stream and the third standby code stream to the switching module.
And the switching module is used for receiving the main code stream, the first standby code stream, the second standby code stream and the third standby code stream and switching the main code stream to each standby code stream signal according to the monitored fault type of the main code stream signal.
And the main signal source input end module is used for receiving the main signal source, transmitting the main signal source to the first data input port of the switching module and establishing a data routing relation with the main and standby equipment.
And the standby signal source input end module is used for receiving the standby signal source, transmitting the standby signal source to the second data input port of the switching module and establishing a data routing relation with the standby equipment.
The signal sources of the main signal source input end module and the standby signal source input end module are different signal sources, different signal sources are received by different signal source receivers and are respectively transmitted to the main signal input end module and the standby signal input end module after signal source exchange processing, and the signal sources comprise optical fiber, microwave and satellite program signal sources.
As shown in fig. 2, the data routing relationship is specifically implemented as: the data received by the RX pin of the first data input port is cached in a receiving FIFO inside the RX pin, and then is sent to the TX pins of the two first data output ports of the switching module, so that data copying is realized; the two first data input ports respectively input data into the active device and the first standby device.
The data received by the RX pin of the second data input port is cached in a receiving FIFO inside the RX pin, and then is sent to the TX pins of two second data output ports of the switching module, so that data replication is realized; and the two second data input ports input data into the second standby equipment and the third standby equipment respectively.
The TX pins of the four data output ports of the active device and each standby device transmit the processed data to the RX pins of the data input ports of the switching module, and the four data are switched in the switching module by a one-out-of-four multiplexer.
The switching system also comprises a fault monitoring module which is used for acquiring the data information of each device through the monitoring port, sending a state data packet to the switching module at regular time, simultaneously knowing whether the main device and the standby device work normally or not and controlling the data switch to select the main port or each standby port. For example, when a video/audio PID in the primary device is lost, the PID corresponding to the program in the first backup code stream may be switched to; when the first standby equipment signal also has a fault, the first standby equipment signal can be switched to the second standby equipment, and the like, and also can be switched to the third standby equipment, namely, the standby signals of the second standby equipment and the third standby equipment are regarded as auxiliary signals, and the probability of the fault of multiple paths is extremely low.
The fault monitoring module also obtains signal source data of the first data input port and the second data input port through the monitoring port, and controls the data switch to select the main equipment port or the standby equipment port according to the set normal condition and abnormal condition of the working state. The arrangement of the monitoring part can further avoid invalid switching, namely when the fault detection module detects that a certain signal source has a problem, the system is directly switched to a standby equipment signal corresponding to another signal source; and invalid switching between the main equipment and the standby equipment corresponding to the fault signal source is prevented.
To implement the monitoring at the data input port, the following improvements to the fault monitoring module are required.
The fault monitoring module comprises an optical fiber signal detection unit, the optical fiber signal detection unit is used for preprocessing the received optical fiber signal and detecting whether the optical signal and the carrier wave are correct or not through an optical signal detection chip, and the fault detection module is used for judging whether to immediately switch between the main equipment data and the standby equipment data or not according to the detection result. For example, in one embodiment, the optical signal detection unit is composed of a fiber optic receiver tube, an integrated circuit chip IC1, an IC2, and a triode. The optical fiber receiving tube T1 is of InGaAsP/InPPIN type, and a voltage comparator, a voltage reference source and a shaping circuit are integrated in the IC1 and IC2 chips. The IC1 preprocesses the received signal, the processed signal is buffered by the transistor T2 and output to the IC2, the IC2 detects whether the optical signal and the carrier wave are correct, and the detection result is input to the master controller of the fault monitoring unit.
The fault monitoring module comprises a satellite signal detection unit, the satellite signal detection unit counts video line synchronous signals after the video signals output by the satellite receiver are separated through the synchronous separation circuit, whether the satellite signal source is normal or not is judged according to the rule of the number of lines of the video signal frame, and the fault detection module judges whether the switching between the main equipment data and the standby equipment data is immediately carried out or not according to the detection result. Specifically, there are 25 frames per 1 second, 625 lines per frame, due to the inherent regularity of the video signal. The video signal output by the satellite receiver is separated into video line synchronizing signals through a synchronizing separation circuit, the microprocessor counts the video line synchronizing signals, one period is set every 40 milliseconds (1 frame image), if the number of 1 frame lines is equal to 625, the satellite signal source is normal, if the number of 1 frame lines is not equal to 625, the satellite signal source is in failure, the satellite signal source is immediately judged to be invalid, and the signal source is immediately switched.
In another embodiment of the present invention, the system further includes a fault indication module, where the fault indication module includes fault indications of the active device and each standby device and a fault indication of the signal source input terminal.
The fault indications of the main device and each standby device are specifically a signal loss indication, a synchronization loss indication and a PID loss error indication. The signal source input end fault indication is an error and loss indication of the signal source.
The switching system can also set a switching time unit according to the signal loss indication, and is used for responding in a set time period range respectively according to the indication information of the fault indication module, and all actions beyond the time period range do not respond. For example, the time period is set by taking a week as a cycle, and from Monday to Sunday, three segments are taken every day, and each segment can be independently set and started and stopped. For another example, in the case of an optical fiber signal source, the terminal may set the action of switching the optical fiber signal source to be unresponsive in the period of time in which the terminal cannot watch periodically due to the shared broadband; therefore, an optimal video and audio watching scheme is provided for the user through the code stream switching system.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (5)
1. A kind of IP code stream hot backup switching system, apply to the mobile multimedia broadcasting system, the said switching system includes at least:
the main and standby equipment group comprises main equipment and first standby equipment which are respectively and correspondingly used for inputting a first main code stream and a first standby code stream value to the switching module;
the standby equipment group comprises second standby equipment and third standby equipment which are respectively and correspondingly used for inputting a second standby code stream and a third standby code stream to the switching module;
the switching module is used for receiving the main code stream, the first standby code stream, the second standby code stream and the third standby code stream and switching the main code stream to each standby code stream signal according to the monitored fault type of the main code stream signal;
the main signal source input end module is used for receiving a main signal source, transmitting the main signal source to a first data input port of the switching module and establishing a data routing relation with the main and standby equipment;
the standby signal source input end module is used for receiving a standby signal source, transmitting the standby signal source to a second data input port of the switching module and establishing a data routing relation with the standby equipment;
the signal sources of the main signal source input end module and the standby signal source input end module are different signal sources, and the signal sources comprise optical fiber, microwave and satellite program signal sources;
the data routing relationship is specifically as follows: the data received by the RX pin of the first data input port is cached in a receiving FIFO inside the RX pin, and then is sent to the TX pins of the two first data output ports of the switching module, so that data copying is realized; the two first data input ports respectively input data into the main equipment and the first standby equipment;
the data received by the RX pin of the second data input port is cached in a receiving FIFO inside the RX pin, and then is sent to the TX pins of two second data output ports of the switching module, so that data replication is realized; the two second data input ports respectively input data into the second standby equipment and the third standby equipment;
the TX pins of the four data output ports of the main equipment and each standby equipment send processed data to an RX pin of a data input port of a switching module, and the four data are switched in the switching module through a multi-way switch;
the system also comprises a fault monitoring module, a switching module and a data switch, wherein the fault monitoring module is used for acquiring data information of each device through a monitoring port, sending a state data packet to the switching module at regular time, simultaneously knowing whether the main device and the standby device work normally or not and controlling the data switch to select the main port or each standby port; the fault monitoring module also obtains signal source data of the first data input port and the second data input port through the monitoring port, and controls the data switch to select the main equipment port or the standby equipment port according to the set normal condition and abnormal condition of the working state.
2. The IP code stream hot backup switching system according to claim 1, wherein the fault monitoring module includes an optical fiber signal detection unit, the optical fiber signal detection unit preprocesses the received optical fiber signal and detects whether the optical signal and the carrier are correct through an optical signal detection chip, and the fault detection module determines whether to immediately switch between the main device data and the standby device data according to a detection result.
3. The IP code stream hot backup switching system according to claim 1, wherein the failure monitoring module includes a satellite signal detecting unit, the satellite signal detecting unit counts video line synchronizing signals after video signals output by the satellite receiver are separated by the synchronization separating circuit, whether the satellite signal source is normal or not is judged according to whether the number of video signal frame lines is regular, and the failure detecting module judges whether to immediately switch between the main/standby device data and the standby device data according to the detection result.
4. The IP code stream hot backup switching system according to claim 1, wherein the system further comprises a fault indication module, the fault indication module includes fault indications of the main device and each standby device and a fault indication of the signal source input terminal;
the fault indications of the main equipment and each standby equipment are specifically a signal loss indication, a synchronization loss indication and a PID loss error indication;
the signal source input end fault indication is an error and loss indication of the signal source.
5. The IP code stream hot backup switching system according to claim 4, wherein the system is configured to respond within a set time period range according to the type of indication information of the failure indication module, and not respond to all actions beyond the time period range.
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| CN112491464B (en) * | 2020-12-01 | 2022-08-09 | 凯睿星通信息科技(南京)股份有限公司 | Distributed fault real-time monitoring and standby equipment switching method for satellite communication |
| CN113596515A (en) * | 2021-08-10 | 2021-11-02 | 伟乐视讯科技股份有限公司 | Seamless output method and device for uncompressed data |
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