CN106210625B - A kind of transmission method of video data, device and system - Google Patents
A kind of transmission method of video data, device and system Download PDFInfo
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- 238000010295 mobile communication Methods 0.000 claims abstract description 144
- 230000033001 locomotion Effects 0.000 claims description 15
- 238000010586 diagram Methods 0.000 description 9
- 238000012544 monitoring process Methods 0.000 description 5
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- 238000011156 evaluation Methods 0.000 description 3
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
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- H04W4/046—
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/10—Small scale networks; Flat hierarchical networks
- H04W84/12—WLAN [Wireless Local Area Networks]
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Abstract
The present invention provides a kind of transmission method of video data, device and system, this method is applied on the first headend equipment being deployed on the first vehicle, this method comprises: obtaining the first location information of first vehicle, and the first location information is sent to server, so that the determination of first location information described in server by utilizing and associated second vehicle of first vehicle；Receive the WIFI information of the second headend equipment being deployed on the second vehicle from the server；WIFI is established with second headend equipment using the WIFI information to connect；When detecting mobile communication signal intensity lower than preset first threshold value, collected video data is sent to by the second headend equipment by the WIFI connection, so that the second headend equipment forwards the video data.According to the technical solution of the present invention, there is no due to 4G network problem, caused by video data the problem of can not being transferred to server, avoid the Caton of video data, improve user experience.
Description
Technical Field
The present invention relates to the field of communications, and in particular, to a method, an apparatus, and a system for transmitting video data.
Background
In recent years, with the rapid development of computers, networks, image processing and transmission technologies, the popularization trend of video monitoring systems is more and more obvious, the video monitoring systems gradually advance to high-definition and intelligentization, and the video monitoring systems can be applied to numerous fields such as intelligent transportation, smart parks, safe cities and the like.
At present, front-end devices (such as a network camera, an analog camera, an encoder and the like) can be deployed on vehicles such as buses and taxis, and with the rapid development of operator networks, bandwidths supported by mobile communication networks are increasingly large, for example, bandwidths supported by 4G networks can reach more than 10M, so that the front-end devices deployed on the vehicles can collect video data and send the video data to a server through the 4G networks, so that the server can obtain the video data collected by the front-end devices and play the video data.
Due to poor 4G network signals in a partial area and poor network conditions, such as a tunnel, a bridge and the like, when a vehicle enters the area, front-end equipment deployed on the vehicle cannot send video data to a server through the 4G network, so that the video data is blocked, and user experience is affected.
Disclosure of Invention
The invention provides a video data transmission method, which is applied to a first front-end device deployed on a first vehicle, and comprises the following steps:
obtaining first position information of the first vehicle, and sending the first position information to a server so that the server determines a second vehicle associated with the first vehicle by using the first position information;
receiving WIFI information of a second front-end device deployed on a second vehicle from the server;
establishing WIFI connection with the second front-end equipment by using the WIFI information;
when the mobile communication signal strength is detected to be lower than a preset first threshold value, the acquired video data is sent to the second front-end equipment through the WIFI connection, so that the second front-end equipment forwards the video data.
The server determines, by using the first location information, a second vehicle associated with the first vehicle, which specifically includes: the server determines a second vehicle related to the first vehicle by using the first position information when the server determines that the first vehicle enters an area with mobile communication signal intensity lower than a preset first threshold value within a preset time by using the first position information, the real-time motion track of the first vehicle and the map information; or when receiving a link sharing request from a first front-end device, the server determines a second vehicle associated with the first vehicle by using the first position information, wherein the link sharing request is sent when the first front-end device detects that the strength of a mobile communication signal is lower than a preset second threshold;
the distance between the second vehicle and the first vehicle is smaller than a WIFI coverage, the second vehicle is currently located in an area where the mobile communication signal intensity is higher than a preset third threshold, the preset third threshold is larger than the preset second threshold, and the preset second threshold is larger than the preset first threshold.
The method further comprises: receiving second location information of the second vehicle from the server; utilize the WIFI information with the process of WIFI connection is established to the second front-end equipment, still include: determining the position relationship between the first vehicle and the second vehicle by using the second position information and the first position information, pointing a WIFI antenna deployed on the first vehicle to the second vehicle by using the position relationship, and establishing WIFI connection with the second front-end equipment by using the WIFI information.
The method further comprises:
before the mobile communication signal strength is detected to be lower than a preset first threshold value, if the mobile communication signal strength is detected to be not lower than the preset first threshold value, sending the collected video data through a mobile communication connection; after the mobile communication signal strength is detected to be lower than a preset first threshold value, if the mobile communication signal strength is detected to be restored to be not lower than the preset first threshold value, sending the collected video data through mobile communication connection, and disconnecting the WIFI connection established between the first front-end equipment and the second front-end equipment.
The method further comprises: after the WIFI information is utilized to establish the WIFI connection with the second front-end equipment, before the collected video data are sent to the second front-end equipment through the WIFI connection, first connection information of the WIFI connection and second connection information of the mobile communication connection are sent to the server, so that the server determines the video data corresponding to the first connection information and the video data corresponding to the second connection information as video data from the same front-end equipment.
When the server determines that the second vehicle will enter an area where the mobile communication signal strength is lower than a preset first threshold value within a preset time, or when a link sharing request from a second front-end device is received, the method further includes: the server determines a third vehicle related to the first vehicle by using the first position information, sends WIFI information of third front-end equipment deployed on the third vehicle to the first front-end equipment, establishes WIFI connection with the third front-end equipment by using the WIFI information, and sends acquired video data to the third front-end equipment through the WIFI connection; or the server determines a fourth vehicle associated with the second vehicle, sends WIFI information of a fourth front-end device deployed on the fourth vehicle to the second front-end device, the second front-end device establishes a WIFI connection with the fourth front-end device by using the WIFI information, and sends video data from the first front-end device to the fourth front-end device through the WIFI connection.
The invention provides a video data transmission device, which is applied to a first front-end device deployed on a first vehicle, and specifically comprises:
an obtaining module for obtaining first location information of the first vehicle;
a sending module, configured to send the first location information to a server, so that the server determines, using the first location information, a second vehicle associated with the first vehicle;
a receiving module, configured to receive WIFI information of a second front-end device deployed on the second vehicle from the server;
the establishing module is used for establishing WIFI connection with the second front-end equipment by utilizing the WIFI information;
the sending module is further configured to send the acquired video data to the second front-end device through the WIFI connection when detecting that the mobile communication signal strength is lower than a preset first threshold, so that the second front-end device forwards the video data.
The receiving module is further used for receiving second position information of a second vehicle from the server;
the establishing module is specifically configured to, in a process of establishing a WIFI connection with a second front-end device by using the WIFI information, determine a position relationship between the first vehicle and a second vehicle by using the second position information and the first position information, point a WIFI antenna deployed on the first vehicle to the second vehicle by using the position relationship, and establish the WIFI connection with the second front-end device by using the WIFI information.
The sending module is further configured to send first connection information of the WIFI connection and second connection information of the mobile communication connection to the server after the establishing module establishes the WIFI connection with the second front-end device by using the WIFI information, so that the server determines video data corresponding to the first connection information and video data corresponding to the second connection information as video data from the same front-end device.
The invention provides a video data transmission system, which comprises: a first front-end device deployed on a first vehicle, a second front-end device deployed on a second vehicle, a server; wherein:
the first front-end equipment is used for obtaining first position information of the first vehicle and sending the first position information to the server; receiving WIFI information of a second front-end device deployed on a second vehicle from the server; establishing WIFI connection with the second front-end equipment by using the WIFI information; when the mobile communication signal strength is detected to be lower than a preset first threshold value, sending the acquired video data to the second front-end equipment through the WIFI connection;
the server is used for determining a second vehicle related to the first vehicle by using the first position information after receiving the first position information, and sending WIFI information of second front-end equipment deployed on the second vehicle to the first front-end equipment;
the second front-end device is used for receiving the video data from the first front-end device through the WIFI connection and forwarding the video data to the server.
Based on the above technical solution, in the embodiment of the present invention, when a vehicle enters an area (such as a tunnel, a bridge, and the like) where a signal of a mobile communication network (such as a 4G network and the like) is not good and a network condition is relatively poor, a front end device deployed on the vehicle may send acquired video data to a front end device deployed on another vehicle through a WIFI (Wireless Fidelity) connection, and the front end device deployed on the other vehicle sends the video data to a server, so that a problem that the video data cannot be transmitted to the server due to a 4G network problem does not exist, a jam of the video data is avoided, and user experience is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments of the present invention or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.
FIG. 1 is a schematic diagram of a video surveillance system in one embodiment of the invention;
fig. 2 is a flowchart of a transmission method of video data according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a video surveillance system in another embodiment of the invention;
fig. 4 is a flowchart of a video data transmission method according to another embodiment of the present invention;
FIGS. 5A-5D are schematic diagrams of an application scenario in an embodiment of the present invention;
FIG. 6 is a hardware block diagram of a first head end device in one embodiment of the invention;
fig. 7 is a block diagram of a video data transmission apparatus according to an embodiment of the present invention.
Detailed Description
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein is meant to encompass any and all possible combinations of one or more of the associated listed items.
It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present invention. Depending on the context, moreover, the word "if" as used may be interpreted as "at … …" or "when … …" or "in response to a determination".
In view of the problems in the prior art, an embodiment of the present invention provides a method for transmitting video data, where the method may be applied to a video monitoring system, where the video monitoring system may include, but is not limited to, a server (e.g., a video management server) and a front-end device (e.g., a network camera, an analog camera, an encoder, and the like), and the front-end device refers to a front-end device deployed on a vehicle (e.g., a bus, a taxi, and the like).
As shown in fig. 1, which is a schematic view of an application scenario of the embodiment of the present invention, after acquiring video data, a front-end device sends the video data to a base station through a mobile communication network, and the base station sends the video data to a server through a wired network. The server may store the video data after obtaining the video data (in which case the video data is referred to as a stored stream), or play the video data in real time (in which case the video data is referred to as a live stream).
In an example, the mobile communication network in the embodiment of the present invention may be an operator network, such as a 3G network, a 4G network, or the like, or may also be a subsequently evolved 5G network, a 6G network, or the like. In a mobile communication network, a front-end device transmits video data to a base station based on a mobile communication connection, which may be a 3G connection, a 4G connection, a subsequently evolved 5G connection, a 6G connection, or the like. In a mobile communication network, the mobile communication signal may be a 3G signal, a 4G signal, a 5G signal, or the like.
In the application scenario, the video data transmission method may be applied to a first front-end device deployed on a first vehicle, and as shown in fig. 2, the method may specifically include the following steps:
step 201, obtaining first position information of a first vehicle, and sending the first position information to a server, so that the server determines a second vehicle associated with the first vehicle by using the first position information.
Step 202, receiving WIFI information of a second front-end device deployed on a second vehicle from a server, such as an SSID (Service Set Identifier) and a password of the second front-end device.
And 203, establishing WIFI connection with the second front-end equipment by using the WIFI information.
And 204, when the mobile communication signal strength is detected to be lower than a preset first threshold value, sending the acquired video data to second front-end equipment through WIFI connection, and forwarding the video data by the second front-end equipment.
In one example, the process of the server determining the second vehicle associated with the first vehicle using the first location information may include, but is not limited to, the following: the server determines a second vehicle associated with the first vehicle by using the first position information when the first vehicle is judged to enter an area with the mobile communication signal strength lower than a preset first threshold value within a preset time by using the first position information, the real-time motion track of the first vehicle and the map information. Alternatively, when receiving a link sharing request from the first front-end device, the server may determine a second vehicle associated with the first vehicle by using the first location information, where the link sharing request is sent when the first front-end device detects that the mobile communication signal strength is lower than a preset second threshold.
In one example, for a second vehicle associated with the first vehicle and determined by the server by using the first position information, the distance between the second vehicle and the first vehicle is less than the WIFI coverage, and the second vehicle is currently located in an area where the mobile communication signal strength is higher than a preset third threshold. In one example, the predetermined third threshold is greater than the predetermined second threshold, and the predetermined second threshold is greater than the predetermined first threshold.
In one example, the first front-end device may further receive second location information of the second vehicle from the server, and the first front-end device utilizes the WIFI information to establish a WIFI connection with the second front-end device, including but not limited to the following ways: the first front-end equipment determines the position relation between the first vehicle and the second vehicle by using the second position information and the first position information, points the WIFI antenna deployed on the first vehicle to the second vehicle by using the position relation, and establishes WIFI connection with the second front-end equipment by using the WIFI information.
In one example, before detecting that the mobile communication signal strength is lower than the preset first threshold, the first front-end device may send the captured video data through the mobile communication connection if the mobile communication signal strength is not lower than the preset first threshold. Further, after detecting that the mobile communication signal intensity is lower than the preset first threshold value, the first front-end device may send the acquired video data to the second front-end device through the WIFI connection, and if detecting that the mobile communication signal intensity is restored to be not lower than the preset first threshold value, the first front-end device may send the acquired video data through the mobile communication connection, and disconnect the WIFI connection established between the first front-end device and the second front-end device.
In one example, after the first front-end device establishes the WIFI connection with the second front-end device using the WIFI information, before the first front-end device sends the acquired video data to the second front-end device through the WIFI connection, the first front-end device also sends the first connection information of the WIFI connection and the second connection information of the mobile communication connection to the server, so that the server determines the video data corresponding to the first connection information and the video data corresponding to the second connection information as the video data from the same front-end device.
In an example, when the server determines that the second vehicle will enter an area where the mobile communication signal intensity is lower than a preset first threshold value within a preset time, or when a link sharing request from the second front-end device is received, the server may further determine a third vehicle associated with the first vehicle by using the first position information, send WIFI information of a third front-end device deployed on the third vehicle to the first front-end device, establish a WIFI connection with the third front-end device by using the WIFI information, and send the acquired video data to the third front-end device through the WIFI connection. Or, the server may further determine a fourth vehicle associated with the second vehicle, send WIFI information of a fourth front-end device deployed on the fourth vehicle to the second front-end device, establish a WIFI connection with the fourth front-end device by using the WIFI information, and send video data from the first front-end device to the fourth front-end device through the WIFI connection.
Based on the technical scheme, in the embodiment of the invention, when the vehicle enters an area (such as a tunnel, a bridge and the like) with poor signals and poor network conditions, the front-end equipment deployed on the vehicle can send the acquired video data to the front-end equipment deployed on other vehicles through WIFI connection, and the front-end equipment deployed on other vehicles sends the video data to the server, so that the problem that the video data cannot be transmitted to the server due to the 4G network problem is avoided, the video data is prevented from being blocked, and the user experience is improved.
The following describes the above technical solution of the embodiment of the present invention in detail with reference to the application scenario shown in fig. 3. The front-end device a on the vehicle a, the front-end device B on the vehicle B, the front-end device C on the vehicle C, and the front-end device D on the vehicle D all need to be registered to the server through the mobile communication network. Moreover, under the condition that the mobile communication network signals are good, each front-end device sends the video data acquired by the front-end device to the base station through the mobile communication connection, and the base station sends the video data to the server.
In the above application scenario, as shown in fig. 4, the method for transmitting video data includes the following steps:
step 401, each front-end device obtains the position information of the vehicle where the front-end device is located, and sends the position information to a server, for example, periodically or in real time, and sends the position information to the server.
The front-end device may be deployed with a GPS (Global Positioning System) function, and may obtain the position information of the vehicle where the front-end device is located in real time based on the GPS function.
In one example, the head-end device may send the location information to the server over a mobile communication network.
At step 402, the server determines a second vehicle associated with the first vehicle using the location information for each vehicle.
The method comprises the steps that when the server judges that the first vehicle enters an area with mobile communication signal intensity lower than a preset first threshold value within preset time by using position information of the first vehicle, a real-time motion track of the first vehicle and map information, the server determines a second vehicle related to the first vehicle by using the position information of the first vehicle.
In one example, since each front-end device periodically or in real time obtains the position information of the vehicle and sends the position information to the server, the server may analyze the real-time motion trajectory of the vehicle according to a plurality of pieces of position information of the vehicle, as shown in fig. 5A, which is a schematic diagram of the real-time motion trajectory of the vehicle a.
In one example, as shown in fig. 5B, as an example of map Information, the map Information may include, but is not limited to, a GIS (Geographic Information System) map. After obtaining the location information (e.g., location coordinates, etc.) of vehicle a, the server may display vehicle a on the GIS map based on the location information. Further, based on the position information of the vehicle a, the GIS map, and the real-time movement track of the vehicle a, the server may determine an area that the vehicle a may pass through for the next period of time. When the area is found to be an area with the mobile communication signal strength lower than a preset first threshold value, determining that the vehicle A is a first vehicle, and determining a second vehicle associated with the vehicle A by using the position information of the vehicle A.
In one example, the area where the mobile communication signal strength is lower than the preset first threshold value refers to: the preset first threshold is an evaluation criterion of poor coverage of the mobile communication signal, and can be configured according to practical experience. For an area with the mobile communication signal strength lower than a preset first threshold, the mobile communication signal coverage is poor, the network condition is poor, and when a vehicle enters the area, the front-end equipment on the vehicle cannot transmit video data through mobile communication connection. And when the vehicle enters the area, the front-end equipment on the vehicle can transmit video data through mobile communication connection.
In order to implement the above process, the server may mark which areas are areas where the mobile communication signal strength is lower than the preset first threshold on the GIS map, and may dynamically update the areas where the mobile communication signal strength is lower than the preset first threshold. Therefore, based on the position information of the vehicle, the GIS map and the real-time motion track of the vehicle, the server can judge whether the next period of time of the vehicle passes through the area with the mobile communication signal intensity lower than the preset first threshold value. As shown in fig. 5C, assuming that the vehicle a may pass through a tunnel for the next time, and the tunnel is marked as an area where the mobile communication signal strength is lower than the preset first threshold, the server may determine that the vehicle a will enter the area where the mobile communication signal strength is lower than the preset first threshold within the preset time, and determine a second vehicle associated with the vehicle a using the location information of the vehicle a.
In one example, in the process of determining the second vehicle associated with the vehicle a by using the position information of the vehicle a, for the determined second vehicle, the second vehicle may be a vehicle which has a distance smaller than the WIFI coverage and is currently located in an area where the mobile communication signal strength is higher than the preset third threshold.
As shown in fig. 5D, with vehicle a as the center and WIFI coverage as the radius, the server may find all vehicles within the radius on the map, such as vehicle B, vehicle C, vehicle D, etc. shown in fig. 5D. The WIFI coverage ranges of the front-end devices are the same or similar, and one WIFI coverage range can be configured on the server for all the front-end devices.
The server can mark which areas are areas with the mobile communication signal strength higher than a preset third threshold value on the GIS map, and can dynamically update the areas with the mobile communication signal strength higher than the preset third threshold value. Therefore, the vehicle currently located in the area with the mobile communication signal intensity higher than the preset third threshold value can be judged based on the position information of the vehicle and the GIS map. In one example, the area where the mobile communication signal strength is higher than the preset third threshold value refers to: the mobile communication signal covers a better area, and the preset third threshold is an evaluation criterion for better coverage of the mobile communication signal and can be configured according to actual experience. When the vehicle enters the area, the front-end device on the vehicle can transmit the video data acquired by the front-end device through the mobile communication connection, and also can transmit the video data acquired by other front-end devices through the mobile communication connection.
In one example, if there is only one vehicle which has a distance smaller than the WIFI coverage and is currently located in an area where the mobile communication signal strength is higher than the preset third threshold, the vehicle is determined as the second vehicle. If there are multiple vehicles which are located in an area where the distance between the vehicle a and the vehicle a is smaller than the WIFI coverage and the mobile communication signal strength is higher than a preset third threshold, one vehicle is arbitrarily selected from the multiple vehicles as the second vehicle, or one vehicle closest to the vehicle a is selected as the second vehicle, or one vehicle with the same motion trajectory as that of the vehicle a is selected as the second vehicle, or the second vehicle is selected in another manner, which is not limited in this embodiment of the present invention. As shown in fig. 5D, vehicle B may be selected as the second vehicle associated with vehicle a, where the motion trajectory of vehicle B is the same as and closest to that of vehicle a.
For the second vehicle determined in the above manner, because the distance between the second vehicle and the first vehicle is smaller than the WIFI coverage, the first front-end device on the first vehicle can establish a WIFI connection with the second front-end device on the second vehicle, and then the first front-end device can send the video data to the second front-end device, so that the video data can be normally transmitted, and the problem of transmission failure caused by the fact that the video data cannot be transmitted is avoided.
Because the second vehicle is currently located in the area where the mobile communication signal intensity is higher than the preset third threshold, the second front-end device on the second vehicle can transmit the video data acquired by the second front-end device through the mobile communication connection, and also can transmit the video data acquired by the first front-end device through the mobile communication connection, so that the video data acquired by the first front-end device is sent to the server, and the normal transmission of the video data is ensured.
And in the second situation, when the first front-end equipment detects that the strength of the mobile communication signal is lower than the preset second threshold value, the first front-end equipment sends a link sharing request to the server. When the server receives a link sharing request from the first front-end equipment, the server determines a second vehicle related to the first vehicle by using the position information of the first vehicle where the first front-end equipment is located.
In one example, the preset third threshold may be greater than the preset second threshold, and the preset second threshold may be greater than the preset first threshold. Therefore, when the first front-end device on the first vehicle detects that the mobile communication signal strength is lower than the preset second threshold value but is greater than the preset first threshold value during the running process of the first vehicle, it indicates that the first vehicle may enter an area where the mobile communication signal strength is lower than the preset first threshold value within the preset time, but does not enter the area where the mobile communication signal strength is lower than the preset first threshold value currently, and therefore the first front-end device may send a link sharing request to the server through the mobile communication connection.
In one example, the detection, by the first front-end device, that the mobile communication signal strength is lower than the preset second threshold value is: the first vehicle may enter an area where the mobile communication signal strength is lower than the preset first threshold value within a preset time, but does not currently enter the area where the mobile communication signal strength is lower than the preset first threshold value, and may request link sharing.
In an example, taking the first front-end device as the front-end device a and the first vehicle as the vehicle a as an example for explanation, in a process of determining, by using the location information of the vehicle a, a second vehicle associated with the vehicle a, for the determined second vehicle, the second vehicle may be a vehicle which has a distance smaller than a WIFI coverage and is currently located in an area where the mobile communication signal strength is higher than a preset third threshold.
As shown in fig. 5D, with vehicle a as the center and WIFI coverage as the radius, the server may find all vehicles within the radius on the map, such as vehicle B, vehicle C, vehicle D, etc. shown in fig. 5D. The WIFI coverage ranges of the front-end devices are the same or similar, and one WIFI coverage range can be configured on the server for all the front-end devices.
The server can mark which areas are areas with the mobile communication signal strength higher than a preset third threshold value on the GIS map, and can dynamically update the areas with the mobile communication signal strength higher than the preset third threshold value. Therefore, the vehicle currently located in the area with the mobile communication signal intensity higher than the preset third threshold value can be judged based on the position information of the vehicle and the GIS map. In one example, the area where the mobile communication signal strength is higher than the preset third threshold value refers to: the mobile communication signal covers a better area, and the preset third threshold is an evaluation criterion for better coverage of the mobile communication signal and can be configured according to actual experience. When the vehicle enters the area, the front-end device on the vehicle can transmit the video data acquired by the front-end device through the mobile communication connection, and also can transmit the video data acquired by other front-end devices through the mobile communication connection.
In one example, if there is only one vehicle which has a distance smaller than the WIFI coverage and is currently located in an area where the mobile communication signal strength is higher than the preset third threshold, the vehicle is determined as the second vehicle. If there are multiple vehicles which are located in an area where the distance between the vehicle a and the vehicle a is smaller than the WIFI coverage and the mobile communication signal strength is higher than a preset third threshold, one vehicle is arbitrarily selected from the multiple vehicles as the second vehicle, or one vehicle closest to the vehicle a is selected as the second vehicle, or one vehicle with the same motion trajectory as that of the vehicle a is selected as the second vehicle, or the second vehicle is selected in another manner, which is not limited in this embodiment of the present invention. As shown in fig. 5D, vehicle B may be selected as the second vehicle associated with vehicle a, where the motion trajectory of vehicle B is the same as and closest to that of vehicle a.
For the second vehicle determined in the above manner, because the distance between the second vehicle and the first vehicle is smaller than the WIFI coverage, the first front-end device on the first vehicle can establish a WIFI connection with the second front-end device on the second vehicle, and then the first front-end device can send the video data to the second front-end device, so that the video data can be normally transmitted, and the problem of transmission failure caused by the fact that the video data cannot be transmitted is avoided.
Because the second vehicle is currently located in the area where the mobile communication signal intensity is higher than the preset third threshold, the second front-end device on the second vehicle can transmit the video data acquired by the second front-end device through the mobile communication connection, and also can transmit the video data acquired by the first front-end device through the mobile communication connection, so that the video data acquired by the first front-end device is sent to the server, and the normal transmission of the video data is ensured.
In addition, because the front-end equipment actively requests the link sharing operation, a means for actively carrying out link sharing is provided for the front-end equipment, and the use experience of a user is improved. Because the front-end equipment can discover the change of the mobile communication signal strength in advance, the link sharing operation can be completed more timely.
In step 403, the server sends the location information of the first front-end device to the second front-end device, and sends the location information and the WIFI information (such as SSID and password) of the second front-end device to the first front-end device.
And step 404, the first front-end device establishes WIFI connection with the second front-end device by using the WIFI information.
In one example, the first front-end device may determine a positional relationship between the first vehicle and the second vehicle using the positional information of the first front-end device and the positional information of the second front-end device, and point the WIFI antenna disposed on the first vehicle to the second vehicle using the positional relationship. Moreover, the second front-end device may determine a position relationship between the first vehicle and the second vehicle by using the position information of the first front-end device and the position information of the second front-end device, and point the WIFI antenna disposed on the second vehicle to the first vehicle by using the position relationship.
Because the WIFI antenna of deploying on the first vehicle points to the second vehicle, and the WIFI antenna of deploying on the second vehicle points to first vehicle, consequently compare with other position relations, can guarantee that the WIFI signal intensity between first vehicle and the second vehicle is the best, then can be better transmit video data between two front-end devices.
In the process that the first front-end device establishes the WIFI connection with the second front-end device by using the WIFI information (such as SSID and password) of the second front-end device, the first front-end device may search for the SSID of the second front-end device and input the password corresponding to the SSID, so as to connect to the second front-end device.
In step 405, the first front-end device sends first connection information (e.g., quintuple information) of the WIFI connection and second connection information (e.g., quintuple information) of the mobile communication connection to the server.
In one example, the first front-end device may send the first connection information and the second connection information to the second front-end device through the WIFI connection, and the second front-end device sends the first connection information and the second connection information to the server through the mobile communication connection. Alternatively, the first front-end device may send the first connection information and the second connection information to the server through the mobile communication connection. For example, the first front-end device sends a first message to the second front-end device through the WIFI connection, the second front-end device forwards the first message to the server, a message load part of the first message carries the second connection information, and a message header part of the first message carries the first connection information. The first front-end equipment sends a second message to the server through mobile communication connection, wherein the message load part of the second message carries the first connection information, and the message head part of the second message carries the second connection information.
In an example, a source IP address of a header of the first message is an IP address 1 corresponding to the WIFI connection of the first front-end device, a source port is a port 1 corresponding to the WIFI connection of the first front-end device, a destination IP address is an IP address of the server, a destination port is a server port, and a Protocol type is a TCP (Transmission Control Protocol) type. The following contents are carried in the message payload part of the first message: the IP address 2 corresponding to the mobile communication connection of the first front-end equipment, the port 2 corresponding to the mobile communication connection of the first front-end equipment, the IP address of the server, the port of the server and the TCP type.
In one example, for the second packet, the source IP address of the header may be IP address 2, the source port may be port 2, the destination IP address is an IP address of a server, the destination port is a port of the server, and the protocol type is TCP type. The message payload part of the second message may carry the following: IP address 1, port 1, IP address of the server, port of the server, TCP type.
In an example, after receiving the first connection information and the second connection information through the same message (e.g., a first message or a second message), the server may determine that video data corresponding to the first connection information and video data corresponding to the second connection information are video data from the same front-end device. For this process, a description will be given in a subsequent video data transmission process, which is not described herein again.
Based on the above process, there are two uplink connections on the first front-end device, one uplink connection is a mobile communication connection, and the other uplink connection is a WIFI connection. And if the first front-end equipment detects that the strength of the mobile communication signal is not lower than a preset first threshold value, sending the video data acquired by the first front-end equipment through the mobile communication connection, wherein the source IP address of the message header of the video data is IP address 2, the source port is port 2, the destination IP address is the IP address of the server, the destination port is the port of the server, and the protocol type is TCP type. If the first front-end device detects that the mobile communication signal strength is lower than the preset first threshold, step 406 is executed.
Step 406, when it is detected that the mobile communication signal strength is lower than the preset first threshold, the first front-end device sends the acquired video data to the second front-end device through the WIFI connection. In one example, the source IP address of the header of the video data is IP address 1, the source port is port 1, the destination IP address is an IP address of the server, the destination port is a port of the server, and the protocol type is TCP type.
Step 407, after receiving the video data from the first front-end device, the second front-end device forwards the video data, that is, the second front-end device sends the video data to the server through the mobile communication connection.
In step 408, after receiving the video data, the server determines the video data corresponding to the first connection information and the video data corresponding to the second connection information as video data from the same front-end device.
For example, the server receives video data of the second connection information (the source IP address is IP address 2, the source port is port 2, the destination IP address is an IP address of the server, the destination port is a port of the server, and the protocol type is TCP type), and stores the video data. Then, the server receives video data of the first connection information (the source IP address is IP address 1, the source port is port 1, the destination IP address is IP address of the server, the destination port is port of the server, and the protocol type is TCP type), and stores the currently received video data behind the video data of the second connection information. Then, the server receives video data of the second connection information (the source IP address is IP address 2, the source port is port 2, the destination IP address is IP address of the server, the destination port is port of the server, and the protocol type is TCP type), stores the currently received video data behind the video data of the first connection information, and so on.
The server can assemble the video data from the same front-end device, so that the integrity of the video data can be ensured, and the problems of data transmission failure and the like caused by the incomplete video data can be avoided.
In an example, if the first front-end device detects that the mobile communication signal strength is restored to be not lower than the preset first threshold value again, the first front-end device may send the video data acquired by itself through the mobile communication connection again, and may disconnect the WIFI connection established between the first front-end device and the second front-end device.
In an example, when the server determines that the second vehicle will enter an area where the mobile communication signal intensity is lower than a preset first threshold value within a preset time, or when a link sharing request from the second front-end device is received, the server may further determine a third vehicle associated with the first vehicle by using the first position information, send WIFI information of a third front-end device deployed on the third vehicle to the first front-end device, establish a WIFI connection with the third front-end device by using the WIFI information, and send the acquired video data to the third front-end device through the WIFI connection. Or, the server may further determine a fourth vehicle associated with the second vehicle, send WIFI information of a fourth front-end device deployed on the fourth vehicle to the second front-end device, establish a WIFI connection with the fourth front-end device by using the WIFI information, and send video data from the first front-end device to the fourth front-end device through the WIFI connection.
The process of determining that the second vehicle enters the area where the mobile communication signal intensity is lower than the preset first threshold value within the preset time by the server is similar to the process of determining the first vehicle, and is not repeated here. The process of sending the link sharing request by the second front-end device is similar to the process of sending the link sharing request by the first vehicle, and is not described herein again. In addition, the server determines a third vehicle associated with the first vehicle and a fourth vehicle associated with the second vehicle, and establishes the WIFI connection and transmits the video data through the WIFI connection, which are similar to the above processing process for the first vehicle, and are not repeated here.
When the second vehicle enters an area with the mobile communication signal intensity lower than a preset first threshold value within the preset time, the video data collected by the first front-end equipment is transmitted to the server through the third front-end equipment or the fourth front-end equipment, so that the interruption of video data transmission is avoided, and the correct transmission of the video data is ensured.
Based on the technical scheme, in the embodiment of the invention, when the vehicle enters an area (such as a tunnel, a bridge and the like) with poor signals and poor network conditions, the front-end equipment deployed on the vehicle can send the acquired video data to the front-end equipment deployed on other vehicles through WIFI connection, and the front-end equipment deployed on other vehicles sends the video data to the server, so that the problem that the video data cannot be transmitted to the server due to the 4G network problem is avoided, the video data is prevented from being blocked, and the user experience is improved.
Based on the same inventive concept as the method, an embodiment of the present invention further provides a video data transmission apparatus, where the video data transmission apparatus may be applied to a first front-end device deployed on a first vehicle, and the video data transmission apparatus may be implemented by software, or implemented by hardware, or implemented by a combination of hardware and software. The software implementation is taken as an example, and as a logical device, the device is formed by reading corresponding computer program instructions in the nonvolatile memory into the memory for running through the processor of the first front-end device where the device is located. From a hardware aspect, as shown in fig. 6, a hardware structure diagram of a first front-end device where a transmission apparatus of video data is located is provided, where in addition to the processor, the network interface, the memory and the nonvolatile memory shown in fig. 6, the first front-end device may further include other hardware, such as a forwarding chip responsible for processing a packet, and the like; the first front-end device may also be a distributed device in terms of hardware structure, and may include a plurality of interface cards, so as to perform message processing expansion on a hardware level.
As shown in fig. 7, a structural diagram of a transmission apparatus for video data according to the present invention is a transmission apparatus for video data, where the transmission apparatus is applied to a first front-end device deployed on a first vehicle, and the transmission apparatus specifically includes:
an obtaining module 11, configured to obtain first position information of the first vehicle;
a sending module 12, configured to send the first location information to a server, so that the server determines, by using the first location information, a second vehicle associated with the first vehicle;
a receiving module 13, configured to receive WIFI information of a second front-end device deployed on the second vehicle from the server;
the establishing module 14 is configured to establish a WIFI connection with the second front-end device by using the WIFI information;
the sending module 12 is further configured to send the acquired video data to the second front-end device through the WIFI connection when detecting that the mobile communication signal strength is lower than a preset first threshold, so that the second front-end device forwards the video data.
The receiving module 13 is further configured to receive second location information of a second vehicle from the server;
the establishing module 14 is specifically configured to, in a process of establishing a WIFI connection with a second front-end device by using the WIFI information, determine a position relationship between the first vehicle and a second vehicle by using the second position information and the first position information, point a WIFI antenna deployed on the first vehicle to the second vehicle by using the position relationship, and establish the WIFI connection with the second front-end device by using the WIFI information.
The sending module 12 is further configured to send the acquired video data through a mobile communication connection if the mobile communication signal strength is detected to be not lower than a preset first threshold before the mobile communication signal strength is detected to be lower than the preset first threshold; after the mobile communication signal strength is detected to be lower than a preset first threshold value, if the mobile communication signal strength is detected to be restored to be not lower than the preset first threshold value, sending the collected video data through mobile communication connection, and disconnecting the WIFI connection established between the first front-end equipment and the second front-end equipment.
The sending module 12 is further configured to send, after the establishing module 14 establishes the WIFI connection with the second front-end device by using the WIFI information, the first connection information of the WIFI connection and the second connection information of the mobile communication connection to the server, so that the server determines the video data corresponding to the first connection information and the video data corresponding to the second connection information as the video data from the same front-end device.
The modules of the device can be integrated into a whole or can be separately deployed. The modules can be combined into one module, and can also be further split into a plurality of sub-modules.
Based on the same inventive concept as the above method, an embodiment of the present invention further provides a video data transmission system, where the video data transmission system includes: a first front-end device deployed on a first vehicle, a second front-end device deployed on a second vehicle, a server; wherein:
the first front-end equipment is used for obtaining first position information of the first vehicle and sending the first position information to the server; receiving WIFI information of a second front-end device deployed on a second vehicle from the server; establishing WIFI connection with the second front-end equipment by using the WIFI information; when the mobile communication signal strength is detected to be lower than a preset first threshold value, sending the acquired video data to the second front-end equipment through the WIFI connection;
the server is used for determining a second vehicle related to the first vehicle by using the first position information after receiving the first position information, and sending WIFI information of second front-end equipment deployed on the second vehicle to the first front-end equipment;
the second front-end device is used for receiving the video data from the first front-end device through the WIFI connection and forwarding the video data to the server.
The server is specifically configured to, in a process of determining a second vehicle associated with the first vehicle by using the first position information, determine, by using the first position information, a real-time motion trajectory of the first vehicle, and map information, that the first vehicle will enter an area where mobile communication signal intensity is lower than a preset first threshold within a preset time, and then determine, by using the first position information, the second vehicle associated with the first vehicle; or when a link sharing request from a first front-end device is received, determining a second vehicle associated with the first vehicle by using the first position information, wherein the link sharing request is sent when the first front-end device detects that the strength of a mobile communication signal is lower than a preset second threshold;
the distance between the second vehicle and the first vehicle is smaller than a WIFI coverage, the second vehicle is currently located in an area where the mobile communication signal intensity is higher than a preset third threshold, the preset third threshold is larger than the preset second threshold, and the preset second threshold is larger than the preset first threshold.
The first front-end equipment is further used for receiving second position information of the second vehicle from the server; in the process of establishing WIFI connection with the second front-end device by using the WIFI information, determining the position relation between the first vehicle and the second vehicle by using the second position information and the first position information, pointing a WIFI antenna deployed on the first vehicle to the second vehicle by using the position relation, and establishing WIFI connection with the second front-end device by using the WIFI information.
The first front-end equipment is further used for sending the collected video data through a mobile communication connection if the mobile communication signal strength is detected to be not lower than a preset first threshold value before the mobile communication signal strength is detected to be lower than the preset first threshold value; after the mobile communication signal strength is detected to be lower than a preset first threshold value, if the mobile communication signal strength is detected to be restored to be not lower than the preset first threshold value, sending the collected video data through mobile communication connection, and disconnecting the WIFI connection established between the first front-end equipment and the second front-end equipment.
The first front-end device is further configured to send first connection information of the WIFI connection and second connection information of the mobile communication connection to a server after the WIFI connection is established between the WIFI information and the second front-end device and before the collected video data is sent to the second front-end device through the WIFI connection, so that the server determines the video data corresponding to the first connection information and the video data corresponding to the second connection information as video data from the same front-end device.
In one example, the server is further configured to, when it is determined that the second vehicle will enter an area where the mobile communication signal intensity is lower than a preset first threshold value within a preset time, or when a link sharing request from a second front-end device is received, determine a third vehicle associated with the first vehicle by using the first position information, send WIFI information of a third front-end device deployed on the third vehicle to the first front-end device, establish, by the first front-end device, a WIFI connection with the third front-end device by using the WIFI information, and send the acquired video data to the third front-end device through the WIFI connection; or,
determining a fourth vehicle associated with the second vehicle, sending WIFI information of fourth front-end equipment deployed on the fourth vehicle to the second front-end equipment, establishing WIFI connection between the second front-end equipment and the fourth front-end equipment by using the WIFI information, and sending video data from the first front-end equipment to the fourth front-end equipment through the WIFI connection.
Through the above description of the embodiments, those skilled in the art will clearly understand that the present invention may be implemented by software plus a necessary general hardware platform, and certainly may also be implemented by hardware, but in many cases, the former is a better embodiment. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute the methods according to the embodiments of the present invention. Those skilled in the art will appreciate that the drawings are merely schematic representations of one preferred embodiment and that the blocks or flow diagrams in the drawings are not necessarily required to practice the present invention.
Those skilled in the art will appreciate that the modules in the devices in the embodiments may be distributed in the devices in the embodiments according to the description of the embodiments, and may be correspondingly changed in one or more devices different from the embodiments. The modules of the above embodiments may be combined into one module, or further split into multiple sub-modules. The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
The above disclosure is only for a few specific embodiments of the present invention, but the present invention is not limited thereto, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present invention.
Claims (10)
1. A method for transmitting video data, the method being applied to a first head-end device deployed on a first vehicle, the method comprising the steps of:
obtaining first position information of the first vehicle and sending the first position information to a server so that the server determines a second vehicle associated with the first vehicle by using the first position information, comprising: the server determines a second vehicle related to the first vehicle by using the first position information when the server determines that the first vehicle enters an area with mobile communication signal intensity lower than a preset first threshold value within a preset time by using the first position information, the real-time motion track of the first vehicle and the map information;
receiving WIFI information of a second front-end device deployed on a second vehicle from the server;
establishing WIFI connection with the second front-end equipment by using the WIFI information;
when the mobile communication signal strength is detected to be lower than a preset first threshold value, the acquired video data is sent to the second front-end equipment through the WIFI connection, so that the second front-end equipment forwards the video data.
2. The method of claim 1, wherein the server determines a course of a second vehicle associated with the first vehicle using the first location information, in particular comprising:
or when receiving a link sharing request from a first front-end device, the server determines a second vehicle associated with the first vehicle by using the first position information, wherein the link sharing request is sent when the first front-end device detects that the strength of a mobile communication signal is lower than a preset second threshold;
the distance between the second vehicle and the first vehicle is smaller than a WIFI coverage, the second vehicle is currently located in an area where the mobile communication signal intensity is higher than a preset third threshold, the preset third threshold is larger than the preset second threshold, and the preset second threshold is larger than the preset first threshold.
3. The method of claim 1, further comprising:
receiving second location information of the second vehicle from the server;
utilize the WIFI information with the process of WIFI connection is established to the second front-end equipment, still include: determining the position relationship between the first vehicle and the second vehicle by using the second position information and the first position information, pointing a WIFI antenna deployed on the first vehicle to the second vehicle by using the position relationship, and establishing WIFI connection with the second front-end equipment by using the WIFI information.
4. The method of claim 1, further comprising:
before the mobile communication signal strength is detected to be lower than a preset first threshold value, if the mobile communication signal strength is detected to be not lower than the preset first threshold value, sending the collected video data through a mobile communication connection;
after the mobile communication signal strength is detected to be lower than a preset first threshold value, if the mobile communication signal strength is detected to be restored to be not lower than the preset first threshold value, sending the collected video data through mobile communication connection, and disconnecting the WIFI connection established between the first front-end equipment and the second front-end equipment.
5. The method of claim 4, further comprising:
after the WIFI information is utilized to establish the WIFI connection with the second front-end equipment, before the collected video data are sent to the second front-end equipment through the WIFI connection, first connection information of the WIFI connection and second connection information of the mobile communication connection are sent to the server, so that the server determines the video data corresponding to the first connection information and the video data corresponding to the second connection information as video data from the same front-end equipment.
6. The method of claim 1, wherein upon determining that the second vehicle will enter an area where the mobile communication signal strength is below a preset first threshold within a preset time or upon receiving a link sharing request from a second head-end device, the server further comprises:
the server determines a third vehicle related to the first vehicle by using the first position information, sends WIFI information of third front-end equipment deployed on the third vehicle to the first front-end equipment, establishes WIFI connection with the third front-end equipment by using the WIFI information, and sends acquired video data to the third front-end equipment through the WIFI connection; or,
the server determines a fourth vehicle related to the second vehicle, sends WIFI information of fourth front-end equipment deployed on the fourth vehicle to the second front-end equipment, the second front-end equipment establishes WIFI connection with the fourth front-end equipment by using the WIFI information, and sends video data from the first front-end equipment to the fourth front-end equipment through the WIFI connection.
7. A transmission apparatus of video data, the apparatus being applied to a first front-end device deployed on a first vehicle, the apparatus comprising:
an obtaining module for obtaining first location information of the first vehicle;
a sending module, configured to send the first location information to a server, so that the server determines, using the first location information, a second vehicle associated with the first vehicle, including: the server determines a second vehicle related to the first vehicle by using the first position information when the server determines that the first vehicle enters an area with mobile communication signal intensity lower than a preset first threshold value within a preset time by using the first position information, the real-time motion track of the first vehicle and the map information;
a receiving module, configured to receive WIFI information of a second front-end device deployed on the second vehicle from the server;
the establishing module is used for establishing WIFI connection with the second front-end equipment by utilizing the WIFI information;
the sending module is further configured to send the acquired video data to the second front-end device through the WIFI connection when detecting that the mobile communication signal strength is lower than a preset first threshold, so that the second front-end device forwards the video data.
8. The apparatus of claim 7,
the receiving module is further used for receiving second position information of a second vehicle from the server;
the establishing module is specifically configured to, in a process of establishing a WIFI connection with a second front-end device by using the WIFI information, determine a position relationship between the first vehicle and a second vehicle by using the second position information and the first position information, point a WIFI antenna deployed on the first vehicle to the second vehicle by using the position relationship, and establish the WIFI connection with the second front-end device by using the WIFI information.
9. The apparatus of claim 7,
the sending module is further configured to send first connection information of the WIFI connection and second connection information of the mobile communication connection to the server after the establishing module establishes the WIFI connection with the second front-end device by using the WIFI information, so that the server determines video data corresponding to the first connection information and video data corresponding to the second connection information as video data from the same front-end device.
10. A system for transmitting video data, the system comprising: a first front-end device deployed on a first vehicle, a second front-end device deployed on a second vehicle, a server; wherein:
the first front-end equipment is used for obtaining first position information of the first vehicle and sending the first position information to the server; receiving WIFI information of a second front-end device deployed on a second vehicle from the server; establishing WIFI connection with the second front-end equipment by using the WIFI information; when the mobile communication signal strength is detected to be lower than a preset first threshold value, sending the acquired video data to the second front-end equipment through the WIFI connection;
the server is configured to determine, after receiving the first location information, a second vehicle associated with the first vehicle by using the first location information, and send WIFI information of a second front-end device deployed on the second vehicle to the first front-end device, and includes: the server determines a second vehicle related to the first vehicle by using the first position information when the server determines that the first vehicle enters an area with mobile communication signal intensity lower than a preset first threshold value within a preset time by using the first position information, the real-time motion track of the first vehicle and the map information;
the second front-end device is used for receiving the video data from the first front-end device through the WIFI connection and forwarding the video data to the server.
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