CN112995726A

CN112995726A - Display system, hot standby switching method and video control device

Info

Publication number: CN112995726A
Application number: CN201911270869.7A
Authority: CN
Inventors: 刘喆
Original assignee: Hangzhou Hikvision Digital Technology Co Ltd
Current assignee: Hangzhou Hikvision Digital Technology Co Ltd
Priority date: 2019-12-12
Filing date: 2019-12-12
Publication date: 2021-06-18
Anticipated expiration: 2039-12-12
Also published as: CN112995726B

Abstract

The invention provides a display system, a hot standby switching method and a video control device. Based on the invention, the silent video control device can be used for realizing the hot standby of the active video control device, thereby improving the reliability of the forwarding of the data stream to the receiving card chain; the active video control device and the silent video control device are connected with the receiving card chain through a transmission network without the limitation of solidified topology, so that the silent video control device does not have a fixed backup binding relation to the hot standby of the active video control device, if at least two active video control devices exist, the silent video control device can share the hot standby of the at least two active video control devices, and therefore flexible hot standby between the video control devices can be supported, and the hot standby cost is reduced. In addition, the data stream forwarded to the receiving card chain of the splicing display unit through the transmission network can also comprise two data streams which are mutually backed up, so that the reliability of the receiving card chain for acquiring the data stream is further improved.

Description

Display system, hot standby switching method and video control device

Technical Field

The present invention relates to the field of screen display, and in particular, to a display system using tiled screen display, a hot standby switching method for a video control device (e.g., a transmitter card) in the display system, and a video control device.

Background

The tiled screen may include a plurality of unit screens, such as LED (Light Emitting Diode) display screens, and a cabinet carrying the unit screens. The box body is installed according to the preset specification, and the single screens can be spliced mutually. And a receiving card connected with a single display screen carried by the box body is arranged in each box body of the spliced screen, and the receiving cards in each box body are cascaded in a specific connection topology to form a receiving card chain so as to jointly present contents on each single screen of the spliced screen according to a data stream forwarded by a video control device (which can be presented as a physical form of a sending card).

In order to ensure reliable presentation of display contents on a tiled screen, how to improve the reliability of forwarding a data stream to a receiving card chain becomes a technical problem to be solved in the prior art.

Disclosure of Invention

Embodiments of the present invention respectively provide a display system, a hot standby switching method, and a video control apparatus.

In one embodiment, there is provided a display system including:

accessing a receiving card chain of a transmission network;

the video activation control device is accessed to a transmission network in a forwarding activation state and is used for forwarding the acquired data stream to a receiving card chain through the transmission network;

the silent video control device is accessed to the transmission network in a forwarding dormant state, and is used for responding to the fault of the active video control device and switching to a forwarding active state so as to acquire the data stream forwarded by the active video control device before the fault and forward the data stream to a receiving card chain which is a forwarding target of the active video control device before the fault through the transmission network.

Optionally, the data stream forwarded to the receiving card chain through the transmission network includes: the first data stream forwarded to a first internet access of a first chain head receiving card positioned at a first chain end of the receiving card chain and the second data stream forwarded to a second internet access of a second chain head receiving card positioned at a second chain end of the receiving card chain.

Optionally, the number of silent video control devices is less than or equal to the number of active video control devices.

Optionally, the active video control device includes an active video control device in which a forwarding active state is an initial state when the active video control device first accesses the transmission network, and the mute video control device includes a standby video control device in which a forwarding dormant state is an initial state when the mute video control device first accesses the transmission network.

Optionally, the active video control device further comprises a standby video control device that switches from a forwarding dormant state to a forwarding active state.

Optionally, the mute video control apparatus further comprises an active video control apparatus which is repaired after the failure occurs.

Optionally, the number of silent video control devices is at least two.

Optionally, the at least two mute video control apparatuses have different priorities, wherein the mute video control apparatus that is switched to the forwarding active state in response to a failure of any one of the active video control apparatuses is the highest priority one of the at least two mute video control apparatuses.

Optionally, the system further includes a board control device, configured to send a hot standby switching instruction to the selected silent video control device when any one of the active video control devices fails, so as to trigger the selected silent video control device to switch to a forwarding active state.

Optionally, when any one of the active video control devices fails, a hot standby negotiation is further performed between at least two silent video control devices, so that one silent video control device is selected to switch to a forwarding active state through the hot standby negotiation.

Optionally, the system further comprises a board monitoring device, configured to monitor a state of the active video control device, and issue a fault alarm when it is monitored that the active video control device fails.

Optionally, the mute video control device further initiates keep-alive monitoring for the active video control device, wherein when the active video control device does not respond to the keep-alive monitoring timeout, it is determined that the active video control device fails.

Optionally, the apparatus further comprises a data stream distribution means for distributing the data stream generated by the data source to the active video control means, and when the active video control means fails, migrating the data stream distributed to the failed active video control means to the silent video control means switched to the forwarding active state.

Optionally, the mute video control apparatus further initiates a data stream migration request indicating that data stream forwarding of the active video control apparatus is taken over when switching to the forwarding active state in response to a failure of the active video control apparatus.

In another embodiment, a hot standby switching method is provided, including:

when the active video control device which is accessed to the transmission network in the forwarding active state fails, the silent video control device which is accessed to the transmission network in the forwarding dormant state is switched to the forwarding active state;

when the silent video control device completes the switching from the forwarding dormant state to the forwarding active state, the data stream forwarded by the active video control device with the fault before the fault is acquired, and the data stream is forwarded to a receiving card chain which is a forwarding target of the data stream through a transmission network.

Optionally, the obtaining a data stream forwarded by the failed active video control device before the failure and forwarding the data stream to a receiving card chain as a forwarding target of the data stream through a transmission network includes: acquiring a first data stream and a second data stream, wherein forwarding targets of the first data stream and the second data stream are the same as forwarding targets of the activated video control device before failure; and forwarding the acquired first data stream to a first internet access of a first chain head receiving card positioned at a first chain end of the receiving card chain, and forwarding the acquired second data stream to a second internet access of a second chain head receiving card positioned at a second chain end of the receiving card chain.

Optionally, further comprising: in response to receiving the failure alarm, the mute video control apparatus determines that there is an active video control apparatus that has failed.

Optionally, further comprising: and the silent video control device initiates keep-alive monitoring on the active video control device, wherein when the active video control device does not respond to the overtime of the keep-alive monitoring, the active video control device is determined to have a fault.

Optionally, further comprising: upon receiving a hot standby switching instruction generated in response to a failure to activate the video control apparatus, the mute video control apparatus confirms being selected to switch to the forwarding activation state.

Optionally, further comprising: the mute video control apparatus acknowledges being selected to switch to the forward active state when winning a hot standby negotiation initiated between at least two mute video control apparatuses in response to a failure of any one of the active video control apparatuses.

Optionally, further comprising: when the silent video control device is switched to the forwarding activation state in response to the fault of any one of the active video control devices, the silent video control device initiates a data stream migration request which indicates that the data stream forwarding of the active video control device is taken over.

In another embodiment, there is provided a video control apparatus including:

a processor, configured to execute the steps in the hot standby switching method according to the foregoing embodiment; and the number of the first and second groups,

and the data plane forwarding module is powered down to be dormant in response to the forwarding dormant state and powered up to operate in response to the forwarding activated state, wherein the powered up data plane forwarding module is used for undertaking forwarding of the data flow.

In another embodiment, there is provided another video control apparatus including:

And the control plane communication module is used for assisting the processor to receive a hot standby switching instruction, participate in hot standby negotiation, receive fault alarm, initiate keep-alive monitoring or initiate a data stream migration request.

In another embodiment, a non-transitory computer readable storage medium is provided that stores instructions that, when executed by a processor, cause the processor to perform a hot-standby switching method as described above.

Based on the embodiment, the silent video control device can realize hot standby for activating the video control device, so that the reliability of forwarding the data stream to the receiving card chain can be improved; moreover, the active video control device and the silent video control device are connected with the receiving card chain through a transmission network without the limitation of a solidified topology, so that the silent video control device does not have a fixed backup binding relationship to the hot standby of the active video control device, and therefore, if at least two active video control devices exist, the silent video control device can share the hot standby of the at least two active video control devices, and further:

(1) for example, if the active video control device selects the primary video control device for forwarding the active state as the initial device configuration set, and the silent video control device selects the initial device configuration set for forwarding the standby video control device for forwarding the dormant state as the initial state, the standby video control device for forwarding the dormant state can not only provide the hot standby support for any primary video control device without limitation, but also provide the hot standby support for the standby video control device switched to the forwarding active state;

(2) for example, the number of silent video control devices used for hot standby may be less than the number of active video control devices, and if an active video control device selects an active video control device for forwarding the active state as an initial device configuration set and a silent video control device selects an initial device configuration set for forwarding a standby video control device for forwarding the sleep state as an initial state, the active video control device repaired after the failure may also allow hot standby support to be provided for any active video control device or the standby video control device switched to the active state.

In addition, based on the above embodiment, if the data stream forwarded to the receiving card chain through the transmission network includes two data streams that are backup to each other, when a single breakpoint fault occurs in the receiving card chain, it can still be ensured that each receiving card in the receiving card chain can acquire the presentation content in the data stream, so that the reliability of the receiving card chain acquiring the data stream can be further improved.

Drawings

The following drawings are only schematic illustrations and explanations of the present invention, and do not limit the scope of the present invention:

FIG. 1 is a schematic diagram of an exemplary configuration of a display system in one embodiment;

FIG. 2 is a schematic diagram of a first networking example of the display system shown in FIG. 1;

fig. 3 is a diagram illustrating an example of forwarding data streams in the first networking example shown in fig. 2;

FIG. 4 is a diagram illustrating an example of a hot standby switch in the first networking example shown in FIG. 2;

FIG. 5 is a schematic diagram of an example of a repair return in the first networking example of FIG. 2;

FIGS. 6a and 6b are schematic diagrams of a data flow hot standby example in the first networking example shown in FIG. 2;

FIGS. 7a and 7b are schematic diagrams illustrating an example of data flow hot standby switching in the first networking example shown in FIG. 2;

FIGS. 8a and 8b are schematic diagrams of alternate embodiments of data streaming hot standby in the first networking example shown in FIG. 2;

FIG. 9 is a schematic diagram of a second networking example of the display system of FIG. 1;

fig. 10 is a diagram illustrating an example of data flow forwarding in the second networking example shown in fig. 9;

FIG. 11 is a diagram illustrating an example of a hot standby switch in the second networking example of FIG. 9;

FIG. 12 is a schematic diagram of an example of a concurrent heating facility in the second networking example shown in FIG. 9;

FIG. 13 is a schematic diagram of a hot standby connection in the second networking example shown in FIG. 9;

FIG. 14 is a schematic illustration of an example of a repair return in the second example of a network shown in FIG. 9;

FIGS. 15a and 15b are schematic diagrams of an example of data hot standby in the first networking example shown in FIG. 9;

FIGS. 16a and 16b are schematic diagrams illustrating an example of data flow hot standby switching in the second networking example shown in FIG. 9;

17 a-17 d are schematic diagrams of alternate embodiments of data streaming hot standby in the second networking example shown in FIG. 9;

FIGS. 18a and 18b are schematic diagrams of a condition monitoring mechanism suitable for use with a first networking instance and a second networking instance;

FIGS. 19a and 19b are schematic diagrams of a hot standby contention mechanism suitable for use in a second networking example;

FIGS. 20a and 20b are schematic diagrams of a data handover mechanism applicable to a first networking instance and a second networking instance;

fig. 21 is an exemplary flow chart of a hot standby switching method in another embodiment;

fig. 22 is an expanded flow chart illustrating the hot standby switching method shown in fig. 21 for implementing data flow hot standby;

fig. 23a and 23b are schematic diagrams illustrating an extended flow of a state monitoring mechanism introduced in the hot standby switching method shown in fig. 21;

fig. 24a and fig. 24b are schematic diagrams illustrating an extended flow of the hot standby contention mechanism introduced by the hot standby switching method shown in fig. 21;

fig. 25 is an expanded flow diagram illustrating the data retrieval mechanism introduced by the hot standby switching method shown in fig. 21;

fig. 26 is a schematic diagram showing an exemplary configuration of a video control apparatus in another embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and examples.

Fig. 1 is an exemplary structural diagram of a display system in one embodiment. Referring to fig. 1, the display system in this embodiment may include: a tiled display unit 20, an active video control device 30 that is attached to the transmission network 10 in a forward active state, and a mute video control device 40 that is attached to the transmission network 10 in a forward dormant state.

The tiled display unit 20 can contain a receive chain 200 that is attached to the transmission network 10.

In this embodiment, the transmission network 10 is mainly used for transmitting a data stream with the tiled display unit 20 as a forwarding target, and therefore, it can be understood that the transmission network 10 may be any communication network capable of supporting data stream transmission, for example, a communication network (e.g., ethernet) based on switching device two-layer forwarding and/or routing device three-layer forwarding.

Although at least two tiled display units 20 are shown in fig. 1 with the same pattern and reference numerals, this does not mean that each tiled display unit 20 necessarily exists independently as one tiled screen. That is, it is possible for a tiled display unit 20 to physically appear as a separate tiled screen, or it is also possible for at least two tiled displays 20 to be combined in a specific placement position to form a separate tiled screen. That is, the tiled display unit 20 in FIG. 1 should not be construed as necessarily equivalent to a complete tiled screen. In addition, although at least two tiled display units 20 are shown in fig. 1 with the same pattern and reference numerals, this does not mean that the specifications of each tiled display unit 20 (the number of individual screens, and/or the specifications of the individual screens, and/or the number of receiving cards of the receiving card chain 200, and/or the specifications of the receiving cards of the receiving card chain 200) are necessarily identical, but rather that the specifications of the tiled display units 20 are not all the same.

The video control device 30 is activated to forward the acquired data stream to the receiving card chain 200 through the transmission network 10.

However, depending on the loading specification, the active video control device 30 may be configured to forward a data stream targeted to one reception card chain 200, or may be configured to forward a data stream targeted to at least two reception card chains 200. Also, for the case where at least two tiled displays 20 that may exist are combined to form a tiled screen, data streams targeted to different receiving chains 200 belonging to the same tiled screen may be forwarded by the same active video control device 30, or may also be forwarded by different active video control devices 30. That is, there is no necessarily limiting relationship between the number of active video control devices 30 and the number of tiled display units 20.

Also, a data stream may be understood as a cluster or set of traffic streams that contains at least a video traffic stream and a control traffic stream, and does not exclude other traffic streams.

In addition, the data streams forwarded by the receiving card chains 200 of different tiled display units 20 may be from the same data source, or the data sources of the data streams forwarded by the receiving card chains 200 of different tiled display units 20 may not be all the same.

The mute video control apparatus 40 is configured to switch to the forwarding active state in response to a failure of the active video control apparatus 30, to acquire a data stream forwarded by the active video control apparatus 30 before the failure, and to forward the data stream to the receiving card chain 200 as a forwarding target of the active video control apparatus 30 before the failure through the transmission network 10.

Based on the above embodiment, the mute video control apparatus 40 can warm up the active video control apparatus 30, so that the reliability of forwarding the data stream to the receiving card chain 200 can be improved. Also, the above-described embodiment mainly focuses on forwarding with a data stream, but this does not mean excluding the active video control device 30 in the forwarding active state, and the mute video control device 40 may perform additional processing for display control, such as decoding, and/or compression, on the data stream after switching to the forwarding active state.

In the above embodiment, the active video control device 30 and/or the mute video control device 40 may be a transmission card, or it may be understood that the active video control device 30 and/or the mute video control device 40 is in the form of a transmission card. Of course, reference herein to a sending card is not meant to limit the physical form of activating video control device 30 and/or mute video control device 40, but rather to allow activating video control device 30 and/or mute video control device 40 to be presented in other physical forms than a sending card.

When the number of the active video control devices 30 is configured to be at least two. The at least two active video control devices 30 may be independent physical devices, or the at least two active video control devices 30 may be partially or completely integrated into one physical device. Thus, the active video control device 30 should be regarded as a logical transit node before the data stream enters the transport network 10, and should not be limited to whether it physically exists as a separate device.

Also, each of the at least two active video control devices 30 may be configured to forward the acquired data stream to the receiving card chain 200 as a forwarding target through the transmission network 10.

The number of silent video control devices 40 may be at least one regardless of whether the number of active video control devices 30 is one or at least two. That is, there is no necessarily restrictive relationship between the number of silent video control devices 40 and the number of active video control devices 30.

Also, when the number of the silent video control apparatuses 40 is configured to be at least two, they may be independent physical devices, or may be partially or wholly integrated into one physical device. That is, the mute video control apparatus 40 should also be regarded as a logical transit node before the data stream enters the transmission network 10, and should not be limited to whether it physically exists in the form of a stand-alone device.

At least one mute video control apparatus 40 may alternatively be configured to switch to a forwarding active state in response to a failure of any one active video control apparatus 30 to obtain a data stream forwarded by the failed active video control apparatus 30 before the failure and forward the data stream to the receiving card chain 200 as a forwarding target of the failed active video control apparatus 30 before the failure through the transmission network 10, so that the data stream forwarded by the failed active video control apparatus 30 before the failure may be taken over by one mute video control apparatus 40 after switching to the forwarding active state. That is, the data stream taken over by mute video control apparatus 40 after switching to the forwarding active state is directed to the same receive chain 200 as the data stream forwarded by failed active video control apparatus 30 before the failure.

Based on the above embodiment, since the active video control device 30 and the mute video control device 40 can be connected to the receiving card chain 200 through the transmission network 10 without the limitation of the solidified topology, the mute video control device 40 does not have a fixed backup binding relationship with respect to the hot standby of the active video control device 30, and thus, if there are at least two active video control devices 30, the mute video control device 40 can share the hot standby of at least two active video control devices 30.

To more accurately understand the principle of shared hot standby in a display system, a detailed description is given below with reference to a networking example.

Fig. 2 is a schematic diagram of a first networking example of the display system shown in fig. 1. Fig. 3 is a diagram illustrating an example of forwarding data streams in the first networking example shown in fig. 2. Fig. 4 is a schematic diagram of an example of hot standby handover in the first networking example shown in fig. 2.

Referring to fig. 2, in the first networking example, the display system includes J (J is a positive integer greater than or equal to 1, J is greater than or equal to 2 in the first networking example) tiled display units 20_1 to 20_ J, and the display system further includes M (M is a positive integer greater than or equal to 1, M is greater than or equal to 2 in the first networking example) active video control devices 30_1 to 30_ M taking a forwarding activated state as an initial state when the first access transmission network 10, and a standby video control device 41 taking a forwarding dormant state as an initial state when the first access transmission network 10. At this time, the active video control device 30 may include M active video control devices 30_1 to 30_ M, and the mute video control device may include one standby video control device 41.

Then, referring to fig. 3, each active video control device 30_ i (i is a positive integer greater than or equal to 1 and less than or equal to M) may forward the acquired data stream to the receiving card chain 200_ J of the tiled display unit 20_ J through the transmission network 10 when acquiring the data stream targeting the tiled display unit 20_ J (J is a positive integer greater than or equal to 1 and less than or equal to J).

In the first networking example, in order to clearly show the hot standby switching of the data stream, the active video control device 30_ i forwards the data stream to one receiving card chain 200_ j through the transmission network 10, but this does not mean that the number of receiving card chains for which the active video control device 30_ i undertakes data stream forwarding is limited to one.

Referring to fig. 4 again, when any one of the active video control devices 30_ i fails, the standby video control device 41 may switch to a forwarding active state in response to the failure of the active video control device 30_ i, to obtain the data stream forwarded by the failed active video control device 30_ i before the failure, and forward the data stream to the receiving card chain 200_ j of the tiled display unit 20_ j as the forwarding target of the data stream through the transmission network 10, so that the data stream forwarded by the failed active video control device 30_ i before the failure can be taken over by the standby video control device 41 after switching to the forwarding active state, that is, the data stream taken over by the standby video control device 41 after switching to the forwarding active state and the data stream forwarded by the failed primary video control device 30_ i before the failure point to the same tiled display unit 20_ j.

Based on the first networking example, the active video control device 30 may select the active video control devices 30_1 to 30_ M using the forwarding active state as the initial device configuration set, and the mute video control device 40 may select the initial device configuration of the standby video control device 41 using the forwarding dormant state as the initial state, so that system networking in the active/standby device configuration mode may be supported. Also, the first networking instance can also implement shared hot-standby for multiple (M) active video control devices 30 at the minimum cost of one silent video control device 30 (standby video control device 41), i.e., flexible hot-standby between video control devices can be supported and hot-standby cost can be reduced.

Fig. 5 is a schematic diagram of an example of a repair return in the first networking example shown in fig. 2. Referring to fig. 5, when the standby video control device 41 is switched to the forwarding active state to take over the data stream forwarded by the active video control device 30_ i before the failure, it can be considered that the active video control device 30 further includes the standby video control device 41 switched from the forwarding dormant state to the forwarding active state on the basis of including the remaining M-1 active video control devices except the active video control device 30_ i. At this time, the active video control apparatus 30_ i may be repaired and re-accessed to the transmission network 10 in the forwarding dormant state, and accordingly, the mute video control apparatus 40 may include the active video control apparatus 30_ i repaired after the failure occurs.

Based on the repair return mechanism of the active video control device 30_ i introduced in the first networking example, when networking is performed in the active-standby device configuration manner, the shared hot standby may not be limited by the initial device configuration relationship between the active-standby video control devices, but may allow the active video control device 30_ i to provide hot standby support for the standby video control device 41 switched to the forwarding activation state.

Of course, as an alternative to the card-complementing measure of fig. 5, a new standby video controller may be optionally complemented to forward the dormant state to the transmission network 10, and accordingly, the mute video controller 40 may still include the newly networked standby video controller.

Fig. 6a and 6b are schematic diagrams of a data flow hot standby example in the first networking example shown in fig. 2. Fig. 7a and 7b are schematic diagrams of an example of data flow hot standby switching in the first networking example shown in fig. 2.

Referring to fig. 6a, the data stream forwarded by the at least one active video control device 30_ i (active video control device 30) to the receiving card chain 200_ j of the tiled display unit 20_ j through the transmission network 10 may include:

the first data stream forwarded to the first port 210_ j of the first chain head receiving card, which is located at the first chain end of the receiving card chain 200_ j, and,

the second data stream forwarded to the second port 220_ j of the second chain head receiving card at the second link end (opposite to the first link end) of the receiving card chain 200_ j.

At this time, the first data stream and the second data stream may be transferred in opposite paths in the receiving card chain 200_ j, and the first data stream and the second data stream contain the same presentation content to realize data stream hot standby. Referring to fig. 6b, when a single breakpoint fault occurs in the receiving card chain 200_ j, the receiving cards on both sides of the breakpoint in the receiving card chain 200_ j can respectively obtain the same presentation content from the first data stream and the second data stream that are transmitted in the reverse direction, so that the normal presentation of the tiled display unit 20_ j can still be satisfied.

For a forwarding manner using hot standby of a data stream, no matter the receiving card chain 200_ j shown in fig. 7a has no single breakpoint failure, or the receiving card chain 200_ j shown in fig. 7b has a single breakpoint failure, as long as any one of the active video control devices 30_ i (active video control device 30), the first data stream and the second data stream can be simultaneously taken over by the standby video control device 41 (silent video control device 40) after being switched to the forwarding active state, that is, after the standby video control device 41 (silent video control device 40) is switched to the forwarding active state, the data stream forwarded to the receiving card chain 200_ j of the splicing display unit 20_ j through the transmission network 10 may still include the first data stream and the second data stream.

By analogy, when the number of the receiving card chains for which the active video control device 30_ i undertakes data stream forwarding is more than one, the data stream forwarded by each receiving card chain may include a bidirectional backup data stream similar to the first data stream and the second data stream described above.

In addition, the above is an example in which the data stream of the receiving card chain 200_ j is hot-backed by the same active video control device 30 and is migrated to the same mute video control device 40 after being hot-backed. Alternatively, the hot standby of the data stream of the receiving card chain 200_ j may be shared by different active video control devices 30, and when one of the active video control devices 30 fails, the mute video control device 40 switched to the forwarding active state only takes over one path of forwarding that the failed active video control device 30 undertakes before the failure.

Fig. 8a and 8b are schematic diagrams of alternative examples of data flow hot standby in the first networking example shown in fig. 2.

Please first refer to fig. 8a and fig. 8 b:

the first data stream and the second data stream may be shared by different active video control devices 30, that is, the active video control device 30_ i (active video control device 30) shares forwarding of the first data stream to the first port 210_ j of the forwarding 200_ j of the receiving card chain, and the active video control device 30_ k (k is a positive integer greater than or equal to 1, less than or equal to M, and not equal to i) shares forwarding of the second data stream to the second port 220_ j of the forwarding 200_ j of the receiving card chain; of course, the forwarding of the second data stream does not exclude the sharing of the standby video control device in the forwarding active state at this time either;

thereafter, no matter in the case that a single breakpoint fault does not occur in the receiving card chain 200_ j as shown in fig. 8a, or in the case that a single breakpoint fault occurs in the receiving card chain 200_ j as shown in fig. 8b, the first data stream forwarded by the active video control apparatus 30_ i (active video control apparatus 30) that has failed may be taken over by the mute video control apparatus 40 after switching to the forwarding active state, while the second data stream is still forwarded by the normal active video control apparatus 30_ k (also belonging to the active video control apparatus 30 due to being in the forwarding active state). If the forwarding of the second data stream is shared by the standby video control apparatus in the forwarding active state before, the second data stream may not be migrated at this time.

Similarly, when the active video control device 30_ k (which is also the active video control device 30 due to being in the forwarding active state) fails, the second data stream will be taken over by the mute video control device 40 after being switched to the forwarding active state. If the forwarding of the second data stream is shared by the standby video control device in the forwarding active state before, the mute video control device 40 may take over after switching to the forwarding active state. Also, the normal active video control apparatus 30_ i (active video control apparatus 30) can continue forwarding the first data stream.

Based on the data stream hot standby mechanism applied in the first networking example, when a single breakpoint fault occurs in the receiving card chain 200_ j, it can still be ensured that each receiving card in the receiving card chain 200_ j can acquire the presentation content in the data stream, so that the reliability of acquiring the data stream by the receiving card chain 200_ j can be further improved.

FIG. 9 is a schematic diagram of a second networking example of the display system shown in FIG. 1. Fig. 10 is a diagram illustrating an example of data flow forwarding in the second networking example shown in fig. 9. Fig. 11 is a schematic diagram of an example of hot standby switching in the second networking example shown in fig. 9.

Referring to fig. 9, in the second networking example, the display system includes J (J is a positive integer greater than or equal to 1, J is greater than or equal to 2 in the second networking example) tiled display units 20_1 to 20_ J, and the display system further includes M (M is a positive integer greater than or equal to 1, M is greater than or equal to 2 in the second networking example) active video control devices 30_1 to 30_ M in which a forwarding activation state is an initial state when the first access transmission network 10, and N (N is a positive integer greater than or equal to 2) standby video control devices 42_1 to 42_ N in which a forwarding dormancy state is an initial state when the first access transmission network 10. At this time, the active video control device 30 may include M active video control devices 30_1 to 30_ M, and the mute video control device may include N standby video control devices 42_1 to 42_ N.

Referring to fig. 10, each active video control device 30_ i (i is a positive integer greater than or equal to 1 and less than or equal to M) may forward the acquired data stream to the receiving card chain 200_ j of the tiled display unit 20_ j through the transmission network 10 when acquiring the data stream that takes the tiled display unit 20_ j as a forwarding target.

In the second networking example, in order to clearly show the hot standby switching of the data stream, the active video control device 30_ i forwards the data stream to one receiving card chain 200_ j through the transmission network 10, but this does not mean that the number of receiving card chains for which the active video control device 30_ i undertakes data stream forwarding is limited to one.

Referring to fig. 11 again, when any one of the active video control devices 30_ i fails, one of the standby video control devices 42_ p (p is a positive integer greater than or equal to 1 and less than or equal to N) in the standby video control devices 42_1 to 42_ N may switch to the forwarding active state in response to the failure of the active video control device 30_ i (the active video control device 30) to obtain the data stream forwarded by the failed active video control device 30_ i before the failure and forward the data stream to the receiving card chain 200_ j of the splicing display unit 20_ j serving as the forwarding target of the data stream through the transmission network 10, so that the data stream forwarded by the failed active video control device 30_ i before the failure may be taken over by the standby video control device 42_ p after switching to the forwarding active state, that is, the data stream taken over by the standby video control device 42_ p after switching to the forwarding active state, the data stream forwarded before the failure with the failed active video control device 30_ i is directed to the same tiled display unit 20_ j.

In the second networking example, at least two standby video control devices 42_1 to 42_ N (mute video control device 40) may have different priorities, wherein the standby video control device 42_ p (mute video control device 40) that is switched to the forwarding active state in response to a failure of any one of the active video control devices 30_ i (active video control device 30) may be the highest priority one of the at least two standby video control devices 42_1 to 42_ N (mute video control device 40).

Based on the second networking example, the active video control device 30 may select the active video control devices 30_1 to 30_ M in which the forwarding active state is the initial state as the initial device configuration set, and the mute video control device 40 may select the initial device configuration of the standby video control device 41 in which the forwarding dormant state is the initial state, so that similar to the first networking example, the system networking in the active/standby device configuration mode may be supported, and the flexible hot standby between the video control devices may be supported. Moreover, if the number N of the silent video controllers 40 (the standby video controllers 42_1 to 42_ N) is less than or equal to the number M of the active video controllers 30 (the active video controllers 30_1 to 30_ M), the shared hot standby of a plurality of (M) active video controllers 30 can still be realized at a relatively small cost, i.e., the hot standby cost is reduced, compared to the one-to-one binding backup manner of the M standby video controllers.

Fig. 12 is a schematic diagram of an example of a concurrent heating apparatus in the second networking example shown in fig. 9. Referring to fig. 12, during the period when the standby video control device 42_ p is switched to the forwarding active state to take over the data stream forwarded by the active video control device 30_ i before the failure, if another active video control device 30_ k (k is a positive integer which is greater than or equal to 1, less than or equal to M, and is not equal to i) fails, another standby video control device 42_ q (q is a positive integer which is greater than or equal to 1, less than or equal to N, and is not equal to p) in the standby video control devices 42_1 to 42_ N can be switched to the forwarding active state in response to the failure of the active video control device 30_ k (active video control device 30) to obtain the data stream forwarded by the failed active video control device 30_ k before the failure and forward the data stream to the receiving card chain 200_ j of the tiled display unit 20_ j which is the forwarding target of the data stream through the transmission network 10, so that the data stream forwarded by the failed active video control device 30_ i before the failure can be taken over by the standby video control device 42_ p after being switched to the forwarding active state, that is, the data stream taken over by the standby video control device 42_ p after being switched to the forwarding active state and the data stream forwarded by the failed active video control device 30_ i before the failure point to the same tiled display unit 20_ j.

Although the number N of mute video control devices 40 (standby video control devices 42_ 1-42 _ N) in the second networking instance is more than one compared to the first networking instance, and thus has a higher hot-standby cost than the first networking instance, the second networking instance may support hot-standby for concurrent failures.

Fig. 13 is a schematic diagram of a hot standby connection example in the second networking example shown in fig. 9. Referring to fig. 13, during the period when the standby video control device 42_ p switches to the forwarding active state to take over the data stream forwarded by the active video control device 30_ i before the failure, it may be considered that the active video control device 30 further includes the standby video control device 42_ p that switches from the forwarding dormant state to the forwarding active state on the basis of including the remaining M-1 active video control devices except the active video control device 30_ i. At this time, if the standby video control device 42_ p fails again, another standby video control device 42_ q (mute video control device 40) except the standby video control device 42_ p among the standby video control devices 42_1 to 42_ N may be switched to the forwarding active state in response to the failure of the standby video control device 42_ p (which has been changed from the mute video control device 40 to the active video control device 30 at this time) to acquire the data stream forwarded by the failed active video control device 30_ i before the failure and forward the data stream to the receiving card chain 200_ j of the mosaic display unit 20_ j as the forwarding target of the data stream through the transmission network 10, so that the data stream forwarded by the failed active video control device 30_ i before the failure may be taken over by the standby video control device 42_ q instead of the standby video control device 42_ p after being switched to the forwarding active state, that is, the data stream taken over by the standby video control device 42_ q after switching to the forwarding active state, the data stream forwarded by the failed active video control device 30_ i before the failure, and the data stream taken over by the standby video control device 42_ p before the failure all point to the same tiled display unit 20_ j.

Fig. 14 is a schematic diagram of an example of a repair return in the second networking example shown in fig. 9. Referring to fig. 14, during the period when the standby video control device 42_ p switches to the forwarding active state to take over the data stream forwarded by the active video control device 30_ i before the failure, it may be considered that the active video control device 30 further includes the standby video control device 42_ p that switches from the forwarding dormant state to the forwarding active state on the basis of including the remaining M-1 active video control devices except the active video control device 30_ i. At this time, the active video control device 30_ i may be repaired and re-accessed to the transmission network 10 in a forwarding dormant state, and accordingly, the mute video control device 40 may further include the active video control device 30_ i repaired after the failure on the basis of the remaining N-1 standby video control devices except the standby video control device 42_ p in the standby video control devices 42_1 to 42_ N.

For the case that any one of the failed active video control devices 30_ i is allowed to be used as the mute video control device 40 after being repaired, it may be set that the M active video control devices 30_1 to 30_ M and the N standby video control devices 42_1 to 42_ N collectively set a priority order, so that when at least two of the mute video control devices 40 include the active video control device 30_ i in the forwarding dormant state, one of the active video control devices may still be selected to be switched to the forwarding active state according to the priority.

Based on the repair return mechanism of the active video control device 30_ i introduced in the second networking example, when networking is performed in the active-standby device configuration manner, the shared hot standby may not be limited to the initial device configuration relationship between the active and standby video control devices, but may allow the active video control device 30_ i to provide hot standby support for the standby video control device 41 switched to the forwarding activation state, so that the specification configuration in which the N silent video control devices provide hot standby support for the M active video control devices 30 may be maintained without additionally increasing the number of configured video control devices.

Of course, as an alternative to the card supplementing measure in fig. 14, a new standby video control device may be optionally supplemented to forward the dormant state to the transmission network 10, and accordingly, the mute video control device 40 may still include the standby video control device newly connected to the network, and thus maintain the N number of specification configurations.

Fig. 15a and 15b are schematic diagrams of a data flow hot standby example in the first networking example shown in fig. 9. Fig. 16a and 16b are schematic diagrams of an example of data flow hot standby switching in the second networking example shown in fig. 9.

Referring to fig. 15a, similar to the first networking example, the data stream forwarded by the at least one active video control device 30_ i (active video control device 30) to the receiving card chain 200_ j of the tiled display unit 20_ j through the transmission network 10 may include: a first data stream forwarded to a first head of chain receiving card's first port 210_ j at a first link end of the receiving card chain 200_ j, and a second data stream forwarded to a second head of chain receiving card's second port 220_ j at a second link end (opposite the first link end) of the receiving card chain 200_ j. At this time, the first data stream and the second data stream may be transferred in opposite paths in the receiving card chain 200_ j, and the first data stream and the second data stream contain the same presentation content to realize data stream hot standby.

Referring to fig. 15b, similar to the first networking example, when a single breakpoint fault occurs in the receiving card chain 200_ j, the receiving cards on both sides of the breakpoint in the receiving card chain 200_ j can respectively obtain the same presentation content from the first data stream and the second data stream that are reversely transferred, so that the normal presentation of the tiled display unit 20_ j can still be satisfied.

Moreover, no matter in the case that a single breakpoint fault does not occur in the receiving card chain 200_ j as shown in fig. 16a or in the case that a single breakpoint fault occurs in the receiving card chain 200_ j as shown in fig. 16b, as long as any one of the active video control apparatuses 30_ i (active video control apparatus 30), the first data stream and the second data stream can be simultaneously taken over by the standby video control apparatus 42_ p (silent video control apparatus 40) after being switched to the forwarding active state, that is, after the standby video control apparatus 42_ p (silent video control apparatus 40) is switched to the forwarding active state, the data stream forwarded to the receiving card chain 200_ j of the splicing display unit 20_ j through the transmission network 10 can still include the first data stream and the second data stream.

Based on the data stream hot standby mechanism applied in the second networking instance, the reliability of the receiving card chain 200_ j for acquiring the data stream can be further improved like the first networking instance. Moreover, as can be seen from the first networking example and the second networking example, the data stream hot standby mechanism is not affected by the number of silent video control devices 40.

In addition, similar to the first networking example, the hot standby of the data stream of the receiving card chain 200_ j may also be shared by different active video control apparatuses 30, and when one of the active video control apparatuses 30 fails, the mute video control apparatus 40 switched to the forwarding active state only takes over one path of forwarding that the failed active video control apparatus 30 undertakes before the failure.

Fig. 17a to 17d are schematic diagrams of alternative examples of data flow hot standby in the second networking example shown in fig. 2. Please first refer to fig. 17a and 17 d:

the first data stream and the second data stream may be shared by different active video control devices 30, that is, the active video control device 30_ i (active video control device 30) shares forwarding of the first data stream to the first port 210_ j of the forwarding 200_ j of the receiving card chain, the active video control device 30_ k (k is a positive integer greater than or equal to 1, less than or equal to M, and not equal to i) also belongs to the active video control device 30 because of being in the forwarding active state, and shares forwarding of the first data stream to the second port 220_ j of the forwarding 200_ j of the receiving card chain; certainly, the forwarding of the second data stream does not exclude the sharing of the standby video control device in the forwarding activated state at this time, that is, the video control device sharing the first data stream and the second data stream that are hot standby to each other may adopt a dual-active configuration or a configuration of active-standby collocation.

Thereafter, for the case where a single break point failure does not occur in the receiving card chain 200_ j as shown in fig. 17a and the case where a single break point failure occurs in the receiving card chain 200_ j as shown in fig. 17b, when only the active video control apparatus 30_ i (active video control apparatus 30) fails, the forwarded first data stream thereof may be taken over by the standby video control apparatus 40_ p (mute video control apparatus 40) after switching to the forwarding active state, while the second data stream is still forwarded by the normal standby video control apparatus 30_ k (also belonging to the active video control apparatus 30 due to being in the forwarding active state). If the forwarding of the second data stream is shared by the standby video control apparatus in the forwarding active state before, the second data stream may not be migrated at this time.

When both the active video control device 30_ i (active video control device 30) that handles the forwarding of the first data stream and the active video control device 30_ k (also belonging to the active video control device 30 due to being in the forwarding active state) that handles the forwarding of the second data stream fail, please refer to fig. 17c and 17d, the first data stream and the second data stream can be respectively taken over by different standby video control devices 40_ p and 40_ q (mute video control device 40) regardless of whether a single endpoint occurs in the receiving card chain 200_ j.

Fig. 18a and 18b are schematic diagrams of a condition monitoring mechanism suitable for use with a first networking instance and a second networking instance.

Referring to fig. 18a, the display system may further include a board monitoring device 50 for monitoring the status of the active video control devices 30 (each of at least two active video control devices 30 may be used), and when it is detected that the active video control devices 30 (any of at least two active video control devices 30 may be used), the board monitoring device 50 may issue a failure alarm.

For the first networking example shown in fig. 2 that only includes one mute video control device 40 (the standby video control device 41 or the repair-returned active video control device 30_ i), the failure alarm issued by the board monitoring device 50 may be unicast to the mute video control device 40; for the second networking example shown in fig. 9, which includes at least two (N) silent video control devices 40 (all of the standby video control devices 42_1 to 42_ N, or a part of the standby video control devices 42_1 to 42_ N and the active video control device that repairs the return), the failure alarm may be issued by the board monitor 50 to the highest priority one of the silent video control devices 40 in a unicast manner, or to all the silent video control devices 40 in a multicast or broadcast manner.

Moreover, although fig. 18a shows that board monitoring devices 50 are communicatively coupled to active video control devices 30 and mute video control devices 40 via transmission network 10, this is not meant to exclude other alternatives in which board monitoring devices 50 communicate with active video control devices 30 and mute video control devices 40 in a manner that bypasses transmission network 10.

Referring to fig. 18b, as an alternative to fig. 18a, the mute video control device 40 may further initiate keep-alive monitoring of the active video control devices 30 (each in the case of at least two active video control devices 30), wherein it may be determined that the active video control device 30 is malfunctioning when the active video control device 30 (either in the case of at least two active video control devices 30) does not respond to a keep-alive monitoring timeout.

For the first networking example shown in fig. 2, which only includes one mute video control device 40 (the standby video control device 41 or the repair-returned active video control device 30_ i), the mute video control device 40 may periodically initiate keep-alive monitoring in the forwarding dormancy state; for the second networking example shown in fig. 9, which includes at least two (N) silent video control devices 40 (all of the standby video control devices 42_1 to 42_ N, or a part of the standby video control devices 42_1 to 42_ N and the repair-returned active video control device), keep-alive monitoring may be initiated by all the silent video control devices 40, or only one silent video control device 40 with the highest priority may initiate keep-alive monitoring.

Furthermore, although fig. 18a shows keep-alive monitoring and response between the active video control device 30 and the mute video control device 40 over the transport network 10, this is not meant to exclude other alternatives between the active video control device 30 and the mute video control device 40 in which keep-alive monitoring and response bypass the transport network 10.

The above list of two state monitoring mechanisms as shown in fig. 18a and 18b is intended to embody that the hot-standby scheme based on the transport network 10 can be compatible with different state detection mechanisms, and should not be construed as making unnecessary limitations on the state monitoring mechanisms.

Fig. 19a and 19b are schematic diagrams of a hot standby contention mechanism suitable for use in a second networking example.

Referring to fig. 19a, the display system may further include a board control device 70, configured to send a hot standby switching instruction to a selected (e.g., selected according to priority) one mute video control device 40 to trigger the selected mute video control device 40 to switch to the forwarding activation state when the active video control device 30 (at least two active video control devices 30 may be any one) fails.

The hot standby contention mechanism shown in fig. 19a may be combined with the status monitoring mechanism shown in fig. 18a, and at this time, the board monitoring device 50 may further issue a fault notification to the board control device 70 when it is monitored that any one of the active video control devices 30 has a fault.

Alternatively, the hot standby contention mechanism shown in fig. 19a may be combined with the status monitoring mechanism shown in fig. 18b, and at this time, any one of the mute video control apparatuses 40 may issue a fault notification to the board control apparatus 70 when it is determined that the active video control apparatus 30 has a fault.

Referring to fig. 19b, unlike the external control switch shown in fig. 19a, as an alternative, when any one of the active video control devices 30 fails, a hot standby negotiation may be further performed between at least two silent video control devices 40, so as to select (e.g. select according to priority) one silent video control device 40 to switch to the forwarding active state through the hot standby negotiation.

The hot standby contention mechanism shown in fig. 19b may be combined with the status monitoring mechanism shown in fig. 18a, and at this time, the board monitoring device 50 may further issue a fault notification to each mute video control device 40 in a multicast or broadcast manner when it is monitored that any one of the active video control devices 30 fails.

Alternatively, the hotstandby contention mechanism shown in fig. 19b may be combined with the status monitoring mechanism shown in fig. 18b, and at this time, the mute video control apparatus 40 (any one in the case of at least two mute video control apparatuses 40) may initiate hotstandby negotiation between at least two mute video control apparatuses 40 when it is determined that the active video control apparatus 30 has failed.

The above list of two hot standby contention mechanisms as shown in fig. 19a and fig. 19b is intended to embody that the hot standby scheme based on the transmission network 10 can be compatible with different hot standby contention mechanisms, and should not be construed as making unnecessary limitations on the hot standby contention mechanisms.

Fig. 20a and 20b are schematic diagrams of a data handover mechanism applicable to a first networking instance and a second networking instance.

Referring to fig. 20a, the display system may further include a data stream distribution means 60 for distributing a data stream generated by the data source 600 to the active video control means 30, and, when the active video control means 30 (any one in the case of at least two active video control means 30) fails, the data stream distribution means 60 may migrate the data stream distributed to the failed active video control means 30 to the mute video control means 40 (the highest priority one in the case of at least two mute video control means 40) switched to the forwarding active state.

Here, the data switching mechanism shown in fig. 20a may be combined with the status monitoring mechanism shown in fig. 18a or fig. 18b and the hot standby contention mechanism shown in fig. 19a, at this time, the board control apparatus 70 may further send a switching notification indicating that the silent video control apparatus is triggered to switch to the data stream distribution apparatus 60 and receive a failure notification from the board monitoring apparatus 50 or the silent video control apparatus 40, so that the data stream distribution apparatus 60 triggers the migration of the data stream according to the failure notification and the switching notification.

Referring to fig. 20b, unlike the passive switching of data streams as shown in fig. 20a, as an alternative, the mute video control apparatus 40 may also further initiate a data stream migration request 400 indicating that the forwarding of data streams of the active video control apparatus 30 is taken over when switching to the forwarding active state in response to a failure of the active video control apparatus 30. In fig. 19b, the silent video control apparatus 40 directly initiates the data stream migration request 400 to the data source 600 as an example, but it can be understood that when the data stream distribution apparatus 60 shown in fig. 20a further exists in fig. 20b, the silent video control apparatus 40 may also initiate the data stream migration request 400 to the data stream distribution apparatus 60.

The data switching mechanism shown in fig. 20b may be combined with the state monitoring mechanism shown in fig. 18a or fig. 18b and the hot standby contention mechanism shown in fig. 19b, and at this time, after selecting (e.g. according to priority) one mute video control apparatus 40 by hot standby negotiation to switch to the forwarding activation state, the data stream migration request 400 may be further initiated to the data stream distribution apparatus 60 or the data source 600.

The data source 600 shown in fig. 20a and 20b may be a single data source or a collection of data sources containing multiple data sources.

The above list of two data switching mechanisms as shown in fig. 20a and 20b is intended to embody that the hot standby scheme based on the transmission network 10 can be compatible with different data switching mechanisms, and should not be construed as making unnecessary limitations to the data switching mechanism.

The above is a detailed description of the display system. In the following embodiments, a hot standby switching method suitable for a silent video control device will be described.

Fig. 21 is an exemplary flowchart of a hot standby switching method in another embodiment. Referring to fig. 21, in this embodiment, the hot standby switching method may include:

s2110: when the active video control device which is accessed to the transmission network in the forwarding active state fails, the silent video control device which is accessed to the transmission network in the forwarding dormant state is switched to the forwarding active state;

s2120: when the silent video control device completes the switching from the forwarding dormant state to the forwarding active state, the data stream forwarded by the active video control device with the fault before the fault is acquired, and the data stream is forwarded to a receiving card chain which is a forwarding target of the data stream through a transmission network.

After the step, the silent video control device can take over the data stream forwarded by the failed active video control device before the failure after the silent video control device is in the forwarding dormant state to the forwarding active state.

Based on the above process, the silent video control device can realize hot standby for activating the video control device, thereby improving the reliability of forwarding the data stream to the receiving card chain; moreover, the active video control device and the silent video control device can be connected with the receiving card chain through a transmission network without the limitation of the solidified topology, so that the silent video control device does not have a fixed backup binding relationship to the hot standby of the active video control device, and the silent video control device can share the hot standby of at least two active video control devices 30.

Fig. 22 is an expanded flow diagram illustrating the hot standby switching method shown in fig. 21 for implementing data stream hot standby. Referring to fig. 22, when the data stream hot standby mechanism is introduced, the hot standby switching method may include:

s2210: when the active video control device which is accessed to the transmission network in the forwarding active state fails, the silent video control device which is accessed to the transmission network in the forwarding dormant state is switched to the forwarding active state;

s2221: acquiring a first data stream and a second data stream, wherein forwarding targets of the first data stream and the second data stream are the same as forwarding targets of the activated video control device before failure;

s2222: and forwarding the acquired first data stream to a first internet access of a first chain head receiving card positioned at a first chain end of the receiving card chain, and forwarding the acquired second data stream to a second internet access of a second chain head receiving card positioned at a second chain end of the receiving card chain.

After the step, the silent video control device can take over the first data stream and the second data stream which are mutually hot-standby and are forwarded by the failed active video control device before the failure after the silent video control device is in the forwarding dormant state to the forwarding active state.

The above-described S2221 and S2222 may be regarded as extensions to S2120 as shown in fig. 21.

Fig. 23a and 23b are schematic diagrams illustrating an extended flow of the state monitoring mechanism introduced in the hot standby switching method shown in fig. 21.

Referring to fig. 23a, when a status monitoring mechanism based on auxiliary device monitoring is introduced, the hot standby switching method may include:

s2311: in response to the received fault alarm, the silent video control device accessing the transport network in the forwarding dormant state determines that the active video control device accessing the transport network in the forwarding active state has failed.

The fault alarm in this step may be generated by an auxiliary device, for example, the board monitoring apparatus 50 shown in fig. 18 a.

S2312: when the active video control device is determined to be in fault, the silent video control device is switched to a forwarding active state;

s2313: when the silent video control device completes the switching from the forwarding dormant state to the forwarding active state, the data stream forwarded by the active video control device with the fault before the fault is acquired, and the data stream is forwarded to a receiving card chain which is a forwarding target of the data stream through a transmission network.

Referring to fig. 23b again, as an alternative to fig. 23a, when a status monitoring mechanism based on board keep-alive monitoring is introduced, the hot standby switching method may include:

s2321: a silent video control device which is accessed to the transmission network in a forwarding dormant state initiates the keep-alive monitoring of an active video control device which is accessed to the transmission network in a forwarding active state;

s2322: when the activation video control device does not respond to the overtime of the keep-alive monitoring, the silence video control device determines that the activation video control device has a fault and switches to a forwarding activation state;

s2323: when the silent video control device completes the switching from the forwarding dormant state to the forwarding active state, the data stream forwarded by the active video control device with the fault before the fault is acquired, and the data stream is forwarded to a receiving card chain which is a forwarding target of the data stream through a transmission network.

Fig. 24a and fig. 24b are schematic diagrams illustrating an extended flow of the hot standby contention mechanism introduced by the hot standby switching method shown in fig. 21.

Referring to fig. 24a, when a hot standby contention mechanism based on auxiliary device intervention is introduced, the hot standby switching method may include:

s2411: when a hot standby switching instruction generated in response to a fault of activating the video control device is received, confirming that a silent video control device accessed to the transmission network in a forwarding dormant state is selected to be switched to a forwarding activated state;

s2412: when the selection of the switching to the forwarding activation state is confirmed, the silent video control device is switched from the forwarding dormant state to the forwarding activation state;

s2413: when the silent video control device completes the switching from the forwarding dormant state to the forwarding active state, the data stream forwarded by the active video control device with the fault before the fault is acquired, and the data stream is forwarded to a receiving card chain which is a forwarding target of the data stream through a transmission network.

Referring to fig. 24b, when a hot standby contention mechanism based on board card self-election is introduced, the hot standby switching method may include:

s2421: the silent video control means acknowledging being selected to switch to the forward active state when winning in a hot standby negotiation initiated between the at least two silent video control means in response to a failure to activate the video control means;

s2410: when the selection of the switching to the forwarding activation state is confirmed, the silent video control device is switched from the forwarding dormant state to the forwarding activation state;

s2420: when the silent video control device completes the switching from the forwarding dormant state to the forwarding active state, the data stream forwarded by the active video control device with the fault before the fault is acquired, and the data stream is forwarded to a receiving card chain which is a forwarding target of the data stream through a transmission network.

Fig. 25 is an expanded flow diagram illustrating the data retrieval mechanism introduced by the hot standby switching method shown in fig. 21. Referring to fig. 25, when the data request mechanism is introduced, the hot standby switching method may include:

s2510: when the active video control device which is accessed to the transmission network in the forwarding active state fails, the silent video control device which is accessed to the transmission network in the forwarding dormant state is switched to the forwarding active state;

s2520: when the mute video control apparatus switches to the forwarding active state in response to a failure of the active video control apparatus, a data stream migration request (e.g., to a data stream distribution apparatus or a data source) indicating that data stream forwarding of the active video control apparatus is taken over is initiated. After that, the silent video control device switched to the forwarding activation state can activate the identity of the video control device to acquire the data stream forwarded by the failed active video control device before the failure, and forward the data stream to the receiving card chain as the forwarding target of the data stream through the transmission network.

Fig. 26 is a schematic diagram showing an exemplary configuration of a video control apparatus in another embodiment. Referring to fig. 26, a video control apparatus in this embodiment may include:

a processor 2610 configured to perform the steps in the hot standby switching method in the foregoing embodiments; and the number of the first and second groups,

the data plane forwarding module 2620 is configured to power down to sleep in response to the forwarding sleep state and power up to operate in response to the forwarding active state, where the power up data plane forwarding module 2610 is configured to undertake forwarding of the data stream.

In order to support the status monitoring mechanism shown in fig. 18a or 18b, or the hot standby contention mechanism shown in fig. 19a or 19b, or the data switching mechanism shown in fig. 20a or 20b, the video control apparatus may further include:

the control plane communication module 2630 is configured to assist the processor 2610 to receive a hot standby handover instruction, participate in hot standby negotiation, receive a failure alarm, initiate keep-alive monitoring, or initiate a data stream migration request.

As can also be seen in fig. 26, the video control device may further include a non-transitory computer readable storage medium 2600, the non-transitory computer readable storage medium 2600 for storing instructions that, when executed by the processor 2610, may cause the processor 2610 to perform the steps of the hot-standby switching method in the foregoing embodiments.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A display system, comprising:

accessing a receiving card chain of a transmission network;

2. The display system of claim 1, wherein the data stream forwarded to the receiving card chain via the transport network comprises: the first data stream forwarded to a first internet access of a first chain head receiving card positioned at a first chain end of the receiving card chain and the second data stream forwarded to a second internet access of a second chain head receiving card positioned at a second chain end of the receiving card chain.

3. The display system of claim 1 wherein the number of silent video controls is less than or equal to the number of active video controls.

4. The display system according to claim 3, wherein the active video control means includes an active video control means in an initial state when the forwarding active state is first accessed to the transmission network, and the mute video control means includes a standby video control means in an initial state when the forwarding dormant state is first accessed to the transmission network.

5. The display system as recited in claim 4 wherein the active video control means further comprises a standby video control means for switching from a forwarding dormant state to a forwarding active state.

6. The display system of claim 4 wherein the mute video control means further comprises active video control means which is repaired after the failure.

7. The display system as recited in claim 1 wherein the number of silent video controls is at least two.

8. The display system according to claim 7, wherein at least two mute video control apparatuses have different priorities, and wherein the mute video control apparatus that is switched to the forward active state in response to a failure of any one of the active video control apparatuses is the highest priority one of the at least two mute video control apparatuses.

9. The display system as claimed in claim 7, further comprising a board control device for sending a hot standby switching command to the selected mute video control device to trigger the selected mute video control device to switch to the forward active state when any one of the active video control devices fails.

10. The display system according to claim 7, wherein when any one of the active video control devices fails, a hot standby negotiation is further performed between at least two silent video control devices to select one silent video control device to switch to the forward active state through the hot standby negotiation.

11. The display system of claim 1, further comprising board monitoring means for monitoring the status of the active video control means and issuing a fault alarm when a fault is detected in the active video control means.

12. The display system of claim 1, wherein the mute video control means further initiates keep-alive monitoring of the active video control means, wherein the active video control means is determined to be malfunctioning when the active video control means fails to respond to a timeout of the keep-alive monitoring.

13. The display system according to claim 1, further comprising data stream distribution means for distributing a data stream generated by the data source to the active video control means, and, when the active video control means fails, migrating the data stream assigned to the failed active video control means to the mute video control means switched to the forward active state.

14. The display system of claim 1, wherein the mute video control means, upon switching to a forward active state in response to a failure of the active video control means, further initiates a data stream migration request indicating that data stream forwarding for the active video control means is taken over.

15. A hot standby switching method is characterized by comprising the following steps:

16. The hot standby switching method according to claim 15, wherein acquiring the data stream forwarded by the failed active video control device before the failure and forwarding the data stream to a receiving card chain as a forwarding target of the data stream through a transmission network comprises:

acquiring a first data stream and a second data stream, wherein forwarding targets of the first data stream and the second data stream are the same as forwarding targets of the activated video control device before failure;

and forwarding the acquired first data stream to a first internet access of a first chain head receiving card positioned at a first chain end of the receiving card chain, and forwarding the acquired second data stream to a second internet access of a second chain head receiving card positioned at a second chain end of the receiving card chain.

17. The hot-standby switching method according to claim 15, further comprising:

in response to receiving the failure alarm, the mute video control apparatus determines that there is an active video control apparatus that has failed.

18. The hot-standby switching method according to claim 15, further comprising:

and the silent video control device initiates keep-alive monitoring on the active video control device, wherein when the active video control device does not respond to the overtime of the keep-alive monitoring, the active video control device is determined to have a fault.

19. The hot-standby switching method according to claim 15, further comprising:

upon receiving a hot standby switching instruction generated in response to a failure to activate the video control apparatus, the mute video control apparatus confirms being selected to switch to the forwarding activation state.

20. The hot-standby switching method according to claim 15, further comprising:

the mute video control apparatus acknowledges being selected to switch to the forward active state when winning a hot standby negotiation initiated between at least two mute video control apparatuses in response to a failure of any one of the active video control apparatuses.

21. The hot-standby switching method according to claim 15, further comprising:

when the silent video control device is switched to the forwarding activation state in response to the fault of any one of the active video control devices, the silent video control device initiates a data stream migration request which indicates that the data stream forwarding of the active video control device is taken over.

22. A video control apparatus, comprising:

a processor for performing the steps in the hot-standby switching method of claim 15 or 16; and the number of the first and second groups,

23. A video control apparatus, comprising:

a processor for performing the steps in the hot standby switching method of any one of claims 17 to 21; and the number of the first and second groups,

the data plane forwarding module is used for responding to a forwarding dormant state, powering down for dormancy and responding to a forwarding activated state, and powering up for operation, wherein the data plane forwarding module which is powered up for undertaking forwarding of data streams;

24. A non-transitory computer readable storage medium storing instructions that, when executed by a processor, cause the processor to perform the hot-standby switching method of any one of claims 15 to 21.