JP6989463B2 - Video transmission device for mobile remote control device, video transmission method for mobile remote control device, and computer program - Google Patents

Description

The present invention relates to a video transmission device of a mobile remote control device, a video transmission method of the mobile remote control device, and a computer program.

As a wireless communication technique for improving wireless communication quality, for example, the conventional technique described in Patent Document 1 is known. In the prior art described in Patent Document 1, the mobile terminal device is a wireless communication network provided by a plurality of contractors based on the received electric field strength and the error rate of the received signal of the wireless communication network provided by the plurality of contractors. A wireless communication network having a higher received electric field strength or a lower error rate of the received signal is selected from among them to make a connection request.

Further, as a conventional video transmission technique, for example, the conventional technique described in Non-Patent Document 1 is known. In the prior art described in Non-Patent Document 1, when video data is distributed and transmitted over a plurality of IP (Internet Protocol) communication paths, the congestion status of each IP communication path is predicted, and the congestion is predicted. Reduce the data distribution ratio to the road.

Japanese Unexamined Patent Publication No. 2002-300563

"Priority control transmission technology for video file transmission", [Search on August 16, 2018], Internet <URL: https://www.nhk.or.jp/strl/publica/giken_dayori/jp3/mt- 1212.html ＞

However, in the conventional wireless communication technology described above, when the wireless communication network to which the mobile terminal device is connected is switched between the wireless communication networks provided by a plurality of contractors, IP communication between the transmitting side and the receiving side is performed. Is disconnected, so that the data communication between the transmitting side and the receiving side is interrupted. For this reason, in the above-mentioned conventional wireless communication technology, for example, in a video transmission system, video data cannot be received on the receiving side, and the video to be reproduced on the receiving side is interrupted, resulting in deterioration of video quality. Further, in the above-mentioned conventional video transmission technology, when an IP communication path via a wireless communication path exists, it is difficult to adapt to changes in communication quality according to a change in the wireless environment in the wireless communication path.

The present invention has been made in consideration of such circumstances, and an object of the present invention is to improve the quality of an image transmitted by using a plurality of IP communication paths via a wireless communication path.

(1) One aspect of the present invention includes a plurality of wireless communication units that establish wireless communication paths of different wireless communication methods, a wireless measurement unit that measures a communication quality value of the wireless communication path, and the plurality of wireless communication units. A plurality of IP communication units provided corresponding to each unit, and the IP communication path between video receiving devices via the wireless communication path corresponding to the IP communication unit is set to a different IP address for each IP communication unit. A combination of the plurality of IP communication units established in the above, an IP measurement unit that measures the communication quality value of the IP communication path, and a communication quality value of the IP communication path corresponding to the communication quality value of the wireless communication path. The transmission control unit includes a communication path quality determination unit that determines the overall communication path quality, and a transmission control unit that transmits video data to the video receiving device using the plurality of IP communication paths. A video transmission device that selects the IP communication path for transmitting the video data based on the total communication path quality and the importance of the video data, and the video data transmitted by the video transmission device to the video reception device. Is image data captured by a plurality of video cameras provided in the moving body and is video data used for remote operation of the moving body, and the importance of the video data of each video camera is the operation of the moving body. It is a video transmission device for mobile remote control devices that changes according to the situation.
(2) In one aspect of the present invention, the communication path quality determination unit takes into account the communication quality value of the wireless communication path and the communication quality value of the IP communication path, as well as the contract information of the wireless communication method, for comprehensive communication. This is a video transmission device for the mobile remote control device according to (1) above, which determines the road quality.
( 3 ) In one aspect of the present invention, the transmission control unit determines the upper limit of the communication amount of the corresponding IP communication path based on the total communication path quality, and the IP communication path is reached until the upper limit of the communication amount is reached. It is a video transmission device of the mobile remote control device according to any one of (1) and (2) above, which allocates the video data to the device.
( 4 ) One aspect of the present invention further includes a handover timing acquisition unit that acquires the handover timing of the wireless communication path, and the transmission control unit changes the video data transmission method according to the handover timing. It is a video transmission device of the mobile remote control device according to any one of (1) to (3).
( 5 ) In one aspect of the present invention, the transmission control unit uses the plurality of IP communication paths corresponding to the plurality of wireless communication paths of the wireless communication method having different coverage according to the handover timing. This is the video transmission device of the mobile remote control device according to (4 ) above, which transmits video data to the video receiver.
( 6 ) In one aspect of the present invention, the transmission control unit performs video data redundant transmission to the video receiving device using a plurality of the IP communication paths in accordance with the handover timing ( 4). ) Or ( 5 ) is a video transmission device for a mobile remote control device.

(7) In one aspect of the present invention, measuring video transmission apparatus, a plurality of radio communication step of establishing a wireless communication path of each different wireless communication systems, the video transmission device, a communication quality value of said radio communication channel The wireless measurement step and the video transmission device are a plurality of IP communication steps provided corresponding to each of the plurality of wireless communication steps, and video reception is performed via the wireless communication path corresponding to the IP communication step. The plurality of IP communication steps for establishing an IP communication path between devices with different IP addresses for each IP communication step, and an IP measurement step for the video transmission device to measure a communication quality value of the IP communication path. the video transmission apparatus includes a channel quality determining step of determining the overall channel quality in combination with the communication quality value of the IP communication path corresponding to the communication quality value of said radio communication channel, the video transmission device, The control step includes a control step of transmitting video data to the video receiving device using the plurality of IP communication paths, and the control step is based on the total communication path quality and the importance of the video data. It is a video transmission method that selects the IP communication path for transmitting data, and the video data transmitted by the video transmission device to the video receiving device is image data captured by a plurality of video cameras provided in the moving body. It is video data used for remote operation of the mobile body, and the importance of the video data of each video camera is a video transmission method of the mobile remote control device, which changes according to the operating condition of the mobile body. ..

( 8 ) One aspect of the present invention is a plurality of wireless communication steps for establishing wireless communication paths of different wireless communication methods in a computer of a video transmission device of a mobile remote control device, and a communication quality value of the wireless communication path. And a plurality of IP communication steps provided corresponding to each of the plurality of wireless communication steps, the IP between the video receiving devices via the wireless communication path corresponding to the IP communication step. The plurality of IP communication steps for establishing a communication path with different IP addresses for each IP communication step, an IP measurement step for measuring a communication quality value of the IP communication path, and a communication quality value of the wireless communication path. A communication path quality determination step for determining the overall communication path quality in combination with the communication quality value of the corresponding IP communication path, and a control for transmitting video data to the video receiving device using the plurality of IP communication paths. a method, a computer program for executing the control step selects the IP communication path for transmitting the video data based on the importance of the overall channel quality video data, a computer program The video data transmitted by the video transmission device to the video receiving device is image data captured by a plurality of video cameras provided in the moving body and is video data used for remote operation of the moving body. The importance of the video data of each of the video cameras is a computer program that changes according to the operating conditions of the moving object.

According to the present invention, there is an effect that the quality of an image transmitted by using a plurality of IP communication paths via a wireless communication path can be improved.

It is a block diagram which shows the structural example of the image transmission apparatus which concerns on one Embodiment. It is a block diagram which shows the structural example of the video transmission system which concerns on one Embodiment. It is a flowchart which shows the example of the procedure of the video transmission method which concerns on one Embodiment. It is a block diagram which shows the structural example of the image transmission apparatus which concerns on other embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing a configuration example of a video transmission device according to an embodiment. In FIG. 1, the video transmission device 1 has a plurality of (n pieces, n is an integer of 2 or more) communication units 10-1, 10-2, ..., 10-n (hereinafter, when not particularly distinguished, "communication". A unit 10 ”), an input unit 21, a transmission buffer 22, and a control unit 30. The communication unit 10 includes an antenna 11, a wireless communication unit 12, a wireless measurement unit 13, an IP communication unit 14, and an IP measurement unit 15. The control unit 30 includes a communication path quality determination unit 31 and a transmission control unit 32.

In the communication units 10-1, 10-2, ..., 10-n, each radio communication unit 12 establishes a radio communication path of a different radio communication method. The total of n wireless communication units 12 provided in the communication units 10-1, 10-2, ..., 10-n do not adversely affect the communication quality of each other even if they perform wireless communication at the same time. The communication method is determined. For example, a wireless communication method having a different frequency band to be used, a coding method, or the like is determined as the wireless communication method of each wireless communication unit 12. For example, the plurality of wireless communication units 12 may be connected to a wireless communication network such as a mobile phone network provided by different communication carriers to establish a wireless communication path. Further, the plurality of wireless communication units 12 may establish a wireless communication path by different wireless communication methods provided by the same communication carrier.

The antenna 11 is an antenna suitable for the wireless communication method of the wireless communication unit 12 of the self-communication unit 10. The wireless measurement unit 13 measures the communication quality value of the wireless communication path established by the wireless communication unit 12 of the self-communication unit 10. The communication quality value of the wireless communication path is, for example, an electric field strength or an error rate.

In the communication units 10-1, 10-2, ..., 10-n, different IP addresses are set for each IP communication unit 14. The IP communication unit 14 establishes an IP communication path between video receiving devices with its own IP address. The IP communication path between the video receiving devices established by the IP communication unit 14 is an IP communication path via the wireless communication path established by the wireless communication unit 12 of the own communication unit 10. Specifically, the IP communication unit 14 sets its own IP address as the source address for the IP packet that sets the IP address of the video receiving device as the destination address. The IP communication unit 14 passes an IP packet addressed to the video receiving device to the wireless communication unit 12 of the own communication unit 10. The wireless communication unit 12 wirelessly transmits an IP packet addressed to the video receiving device received from the IP communication unit 14 of the self-communication unit 10 via the antenna 11 of the self-communication unit 10.

The IP measuring unit 15 measures the communication quality value of the IP communication path established by the IP communication unit 14 of the own communication unit 10. The communication quality value of the IP communication path is, for example, delay, jitter, throughput, and the like.

The input unit 21 receives input data such as control commands and video data transmitted to the video receiving device. The control command received by the input unit 21 is passed to the control unit 30. The video data received by the input unit 21 is stored in the transmission buffer 22. As an example of this embodiment, the data size of one video data is the data size that can be stored in one IP packet. Further, each video data has its own sequence number (ID) and its own importance. The importance of the video data is, for example, a coded frame in a moving image coding method such as MPEG, and indicates the importance of the coded frame included in the video data. Of the three types of MPEG encoded frames "I frame", "P frame", and "B frame", the I frame is a key frame of the P frame and the B frame that is decoded with reference to the I frame. Therefore, it is a coded frame having a higher importance than the P frame and the B frame. As described above, in the coded frame in the moving image coding method such as MPEG, the higher the importance is assigned to the one coded frame in which there are many other coded frames that depend on one coded frame at the time of decoding.

Alternatively, the importance of the video data indicates the importance of the video content.
Here, an example of the importance of the video content will be described. As an example of the present embodiment, the video data is image data captured by a plurality of video cameras provided in the autonomous driving vehicle. The plurality of video cameras include a video camera that captures the front of the self-driving vehicle, a video camera that captures both sides (right side and left side) of the self-driving vehicle, and a video camera that captures the rear of the self-driving vehicle.

The video data captured by the autonomous driving vehicle is transmitted from the video transmitting device 1 to the video receiving device, received by the video receiving device, and then reproduced by the video reproducing device, and is remotely controlled to remotely control the autonomous driving vehicle. Presented to the person. The remote operator remotely controls the autonomous driving vehicle while watching the presented video. In such a case, the importance of the image of each video camera changes according to the driving situation of the autonomous driving vehicle. For example, when the self-driving vehicle is traveling straight, the image of the video camera that captures the front of the self-driving vehicle is relatively important, and the image of the other video camera is relatively low. On the other hand, when the self-driving vehicle makes a turn such as a right turn or a left turn, the image of each video camera that captures the front of the self-driving vehicle and the side of the turn is relatively important, and the image of other video cameras is relatively high. The importance is relatively low. Whether the self-driving vehicle is traveling straight or turning is determined based on the amount of steering wheel operation of the self-driving vehicle.

The explanation is returned to FIG.
In the control unit 30, the communication path quality determination unit 31 determines the total communication path quality by combining the communication quality value of the wireless communication path related to one communication unit 10 and the communication quality value of the IP communication path. For example, a function for determining the total communication path quality value from the communication quality value of the wireless communication path and the communication quality value of the IP communication path is set in advance, and the communication path quality determination unit 31 uses the function to determine the comprehensive communication path. Find the quality value.

Even if the communication path quality determination unit 31 determines the total communication path quality by taking into account the communication quality value of the wireless communication path and the communication quality value of the IP communication path, as well as the contract information of the wireless communication method. good. The contract information for wireless communication is, for example, a communication charge or a contract plan. The communication path quality determination unit 31 determines, for example, the comprehensive communication path quality corresponding to the wireless communication path established by the wireless communication unit 12 of the wireless communication method having a relatively low communication charge as a relatively good quality.

The transmission control unit 32 transmits video data to the video receiving device using a plurality of IP communication paths. Specifically, the transmission control unit 32 takes out video data from the transmission buffer 22 and passes it to any communication unit 10. The IP communication unit 14 of the communication unit 10 stores the video data received from the transmission control unit 32 in an IP packet addressed to the video receiving device and passes it to the wireless communication unit 12 of the own communication unit 10. The wireless communication unit 12 wirelessly transmits an IP packet addressed to the video receiving device received from the IP communication unit 14 of the self-communication unit 10 via the antenna 11 of the self-communication unit 10. The transmission control unit 32 selects a communication unit 10 that transmits the video data, that is, an IP communication path, based on the overall communication path quality and the importance of the video data.

Next, the video transmission system according to the present embodiment will be described with reference to FIG. FIG. 2 is a block diagram showing a configuration example of the video transmission system according to the present embodiment. In FIG. 2, the video transmission system 100 includes a video transmission device 1 and a video reception device 4. Video data is input to the video transmission device 1 from the video generation device 2. The image generation device 2 generates image data from, for example, image pickup data captured by a video camera. Alternatively, the video generation device 2 may generate video data by computer graphics, for example.

The video transmission device 1 has n radio base stations 3-1, 3-2, ..., 3-n corresponding to the communication units 10-1, 10-2, ..., 10-n, respectively. N wireless communication paths are established between them. The wireless communication unit 12 of the communication unit 10-1 connects to the wireless base station 3-1 to establish a wireless communication path of the wireless communication method R-1. The wireless communication unit 12 of the communication unit 10-2 connects to the wireless base station 3-2 to establish a wireless communication path of the wireless communication method R-2. Similarly, the radio communication unit 12 of the communication unit 10-n connects to the radio base station 3-n to establish a radio communication path of the radio communication system Rn.

N IP communication paths are established between the video transmitting device 1 and the video receiving device 4. The IP communication unit 14 of the communication unit 10-1 uses its own IP address Ad-1 as the source address of the IP packet to establish an IP communication path between the video receiving devices. The IP communication unit 14 of the communication unit 10-2 uses its own IP address Ad-2 as the source address of the IP packet to establish an IP communication path between the video receiving devices. Similarly, the IP communication unit 14 of the communication unit 10-n uses its own IP address Ad-n as the source address of the IP packet to establish an IP communication path between the video receiving devices.

The n IP communication paths (source addresses Ad-1, Ad-2, ..., Ad-n) correspond to the corresponding wireless communication paths (wireless communication methods R-1, R-2, ..., Ad-n), respectively. It is an IP communication path via Rn). Specifically, the IP packet of the source address Ad-1 is received by the wireless base station 3-1 via the wireless communication path of the wireless communication method R-1, and the IP of the Internet or the like is received from the wireless base station 3-1. It is transmitted to the video receiving device 4 via the network. The IP packet of the source address Ad-2 is received by the wireless base station 3-2 via the wireless communication path of the wireless communication method R-2, and the video is transmitted from the wireless base station 3-2 via an IP network such as the Internet. It is transmitted to the receiving device 4. Similarly, the IP packet of the source address Ad-n is received by the wireless base station 3-n via the wireless communication path of the wireless communication method RN, and the IP network such as the Internet is transmitted from the wireless base station 3-n. It is transmitted to the video receiving device 4 via the video receiving device 4.

The video receiving device 4 receives the IP packet transmitted from the video transmitting device 1 via n IP communication paths. The video receiving device 4 outputs the video data stored in the received IP packet to the video reproducing device 5 in the order of the video data IDs. The video reproduction device 5 reproduces the video data based on the ID of the video data.

Next, the operation of the video transmission device according to the present embodiment will be described with reference to FIG. FIG. 3 is a flowchart showing an example of the procedure of the video transmission method according to the present embodiment.

(Step S1) In the video transmission device 1, the input unit 21 stores the received video data in the transmission buffer 22.

(Step S2) The transmission control unit 32 determines whether or not a predetermined transmission condition is satisfied. The transmission condition is a condition for executing the video data transmission process. An example of transmission conditions is shown below.

(Example 1 of transmission condition) The total amount of current video data in the transmission buffer 22 exceeds a predetermined threshold value.
(Example 2 of transmission condition) The total number of current video data in the transmission buffer 22 exceeds a predetermined threshold value.
(Example 3 of transmission condition) The time elapsed from the previous transmission timing exceeds a predetermined threshold value.

The above-mentioned transmission conditions Examples 1, 2, and 3 may be used alone or in combination of two or more.

If the transmission condition is satisfied, the process proceeds to step S3, and if the transmission condition is not satisfied, the process returns to step S1.

(Step S3) The communication path quality determination unit 31 determines the total communication path quality for each communication unit 10 by combining the communication quality value of the wireless communication path and the communication quality value of the IP communication path. The transmission control unit 32 sets the upper limit of the communication amount of the IP communication path for each communication unit 10 based on the total communication path quality. An example of the method of setting the upper limit of the communication amount of the IP communication path is shown below.

(Example of how to set the upper limit of communication volume of IP communication path)
The upper limit of the communication amount of the IP communication path is the total communication path quality value Am (Am; m = 1, 2, ..., N) corresponding to the IP communication path and the total amount B of the video data in the transmission buffer 22. It is obtained by a predetermined function F as an argument. For example, the upper limit of the communication amount of the communication unit 10-2 is obtained by F (A2, B). Further, the function F satisfies "ΣF (Am, B) = B". The function F is determined so that the larger the total communication path quality value Am (the better the quality), the larger the value (the larger the upper limit of the communication amount). The function F may be a linear function or an exponential function. Further, the function F may be determined in accordance with the method of determining the importance of the video data.

(Step S4) The transmission control unit 32 sequentially selects from the video data of higher importance among the video data in the transmission buffer 22, and goes to the IP communication path of the communication unit 10 having the higher overall communication path quality. Allocate up to the traffic limit. After allocating the video data up to the upper limit of the communication amount of the IP communication path, the video data is next assigned to the IP communication path of the communication unit 10 having the highest overall communication path quality.

(Step S5) The transmission control unit 32 determines whether or not all the video data in the transmission buffer 22 has been allocated to the IP communication path. As a result of this determination, if all the video data is allocated to the IP communication path, the process proceeds to step S6, and if unallocated video data still remains, the process returns to step S4.

(Step S6) The transmission control unit 32 executes a video data transmission process of transmitting video data on the IP communication path of the communication unit 10 to which the video data is assigned. By the video data transmission process, each video data in the transmission buffer 22 is transmitted on the IP communication path to which it is assigned.

(Step S7) When the process of FIG. 3 is completed, the process of FIG. 3 is terminated. On the other hand, in the case of continuing the process of FIG. 3, the process returns to step S1.

According to the above-described embodiment, a plurality of IP communication paths between video receiving devices via wireless communication paths of different wireless communication methods are established, and the communication quality value of the wireless communication path and the communication quality value of the corresponding IP communication path are established. The IP channel for transmitting the video data is selected based on the total channel quality determined by the combination with and the importance of the video data. As a result, it is possible to select a transmission IP communication path for video data in accordance with changes in communication quality according to changes in the wireless environment in each wireless communication path, so transmission is performed using multiple IP communication paths via the wireless communication path. The effect of being able to improve the quality of the resulting image can be obtained.

According to this embodiment, stable transmission of high-quality and large-capacity video data is possible in a video transmission system that requires video reliability, such as video used for remote operation of an autonomous vehicle. You can get a special effect of becoming.

[Other embodiments]
Next, a video transmission device according to another embodiment will be described with reference to FIG. FIG. 4 is a block diagram showing a configuration example of a video transmission device according to another embodiment. In FIG. 4, the parts corresponding to the parts of FIG. 1 are designated by the same reference numerals, and the description thereof will be omitted. The video transmission device 1a shown in FIG. 4 further includes a handover timing acquisition unit 41 with respect to the video transmission device 1 of FIG.

The handover timing acquisition unit 41 acquires the handover timing of each wireless communication path. The transmission control unit changes the video data transmission method according to the handover timing. An example of changing the video data transmission method is shown below.

(Example of changing the video data transmission method 1)
The transmission control unit 32 transmits video data to the video receiving device using a plurality of IP communication paths corresponding to the wireless communication paths of the plurality of wireless communication methods having different coverage according to the handover timing. At the handover timing of the wireless communication path, the data transmission may be disturbed in the wireless communication path. Then, it can be assumed that the handover timing is different between the wireless communication paths of a plurality of wireless communication methods having different coverages. Therefore, by using multiple wireless communication paths with different coverage according to the handover timing, data is smoothly transmitted in the handover timing of one wireless communication path on another wireless communication path that is not the handover timing. Is done. This has the effect of preventing disturbance of video data transmission at the handover timing.

(Example 2 of changing the video data transmission method)
The transmission control unit 32 performs video data redundant transmission to the video receiving device using a plurality of IP communication paths according to the handover timing. In video data redundant transmission, the same video data is transmitted over a plurality of IP communication paths. As a result, even if the video data transmission is disturbed at the handover timing of the wireless communication path corresponding to a certain IP communication path, the video data transmitted redundantly by another IP communication path prevents the disturbance of the video reproduction. The effect is obtained.

The above-mentioned modification 1 and modification 2 of the video data transmission method may be used alone or in combination of both.

Although the embodiments of the present invention have been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and includes design changes and the like within a range that does not deviate from the gist of the present invention.

For example, a computer program for realizing the functions of the above-mentioned devices may be recorded on a computer-readable recording medium, and the program recorded on the recording medium may be read by the computer system and executed. The "computer system" here may include hardware such as an OS and peripheral devices.
The "computer-readable recording medium" is a flexible disk, a magneto-optical disk, a ROM, a writable non-volatile memory such as a flash memory, a portable medium such as a DVD (Digital Versatile Disc), and a built-in computer system. A storage device such as a hard disk.

Further, the "computer-readable recording medium" is a volatile memory inside a computer system that serves as a server or client when a program is transmitted via a network such as the Internet or a communication line such as a telephone line (for example, DRAM (Dynamic)). It also includes those that hold the program for a certain period of time, such as Random Access Memory)).
Further, the above program may be transmitted from a computer system in which this program is stored in a storage device or the like to another computer system via a transmission medium or by a transmission wave in the transmission medium. Here, the "transmission medium" for transmitting a program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line.
Further, the above program may be for realizing a part of the above-mentioned functions. Further, a so-called difference file (difference program) may be used, which can realize the above-mentioned function in combination with a program already recorded in the computer system.

1 ... Video transmission device, 2 ... Video generation device, 3-1, 3-2, ..., 3-n ... Wireless base station, 4 ... Video reception device, 5 ... Video playback device, 10-1, 10- 2, ..., 10-n ... communication unit, 11 ... antenna, 12 ... wireless communication unit, 13 ... wireless measurement unit, 14 ... IP communication unit, 15 ... IP measurement unit, 21 ... input unit, 22 ... transmission buffer , 30 ... Control unit, 31 ... Communication path quality judgment unit, 32 ... Transmission control unit, 41 ... Handover timing acquisition unit, 100 ... Video transmission system

Claims (8)

Multiple wireless communication units that establish wireless communication paths with different wireless communication methods,
A wireless measuring unit that measures the communication quality value of the wireless communication path,
A plurality of IP communication units provided corresponding to each of the plurality of wireless communication units, and the IP communication path between video receiving devices via the wireless communication path corresponding to the IP communication unit is defined as the IP communication unit. With the plurality of IP communication units established with different IP addresses for each,
An IP measurement unit that measures the communication quality value of the IP communication path,
A communication path quality determination unit that determines the total communication path quality by combining the communication quality value of the wireless communication path and the communication quality value of the corresponding IP communication path,
A transmission control unit for transmitting video data to the video receiving device using the plurality of IP communication paths is provided.
The transmission control unit selects the IP communication path for transmitting the video data based on the total communication path quality and the importance of the video data.
It ’s a video transmission device,
The video data transmitted by the video transmission device to the video receiving device is image data captured by a plurality of video cameras provided in the moving body and is used for remote operation of the moving body.
The importance of the video data of each video camera changes according to the driving situation of the moving body.
Video transmission device for mobile remote control devices . The communication path quality determination unit determines the total communication path quality by further adding the communication quality value of the wireless communication path and the communication quality value of the IP communication path and the contract information of the wireless communication method.
The video transmission device for the mobile remote control device according to claim 1. The transmission control unit determines the upper limit of the communication amount of the corresponding IP communication path based on the total communication path quality, and allocates the video data to the IP communication path until the communication amount upper limit is reached.
The video transmission device for a mobile remote control device according to any one of claims 1 or 2 . Further, a handover timing acquisition unit for acquiring the handover timing of the wireless communication path is provided.
The transmission control unit changes the video data transmission method according to the handover timing.
The video transmission device for a mobile remote control device according to any one of claims 1 to 3 . The transmission control unit transmits video data to the video receiving device using the plurality of IP communication paths corresponding to the plurality of wireless communication paths of the wireless communication method having different coverage according to the handover timing. ,
The video transmission device for the mobile remote control device according to claim 4 . The transmission control unit performs video data redundant transmission to the video receiving device using the plurality of IP communication paths in accordance with the handover timing.
The video transmission device for a mobile remote control device according to any one of claims 4 or 5 . A plurality of wireless communication steps in which a video transmission device establishes a wireless communication path of a different wireless communication method,
A wireless measurement step in which the video transmission device measures a communication quality value of the wireless communication path,
The video transmission device is a plurality of IP communication steps provided corresponding to each of the plurality of wireless communication steps, and is an IP communication path between video receiving devices via the wireless communication path corresponding to the IP communication step. With the plurality of IP communication steps, which are established with different IP addresses for each of the IP communication steps.
The IP measurement step in which the video transmission device measures the communication quality value of the IP communication path,
A communication path quality determination step in which the video transmission device determines the total communication path quality by combining the communication quality value of the wireless communication path and the communication quality value of the corresponding IP communication path.
The video transmission device includes a control step of transmitting video data to the video receiving device using the plurality of IP communication paths.
The control step selects the IP channel to transmit the video data based on the overall channel quality and the importance of the video data.
It ’s a video transmission method.
The video data transmitted by the video transmission device to the video receiving device is image data captured by a plurality of video cameras provided in the moving body and is video data used for remote operation of the moving body.
The importance of the video data of each video camera changes according to the driving situation of the moving body.
Video transmission method for mobile remote control devices . To the computer of the video transmission device of the mobile remote control device,
Multiple wireless communication steps that establish wireless communication paths of different wireless communication methods,
A wireless measurement step for measuring the communication quality value of the wireless communication path, and
A plurality of IP communication steps provided corresponding to each of the plurality of wireless communication steps, and the IP communication path between video receiving devices via the wireless communication path corresponding to the IP communication step is defined as the IP communication step. The plurality of IP communication steps established with different IP addresses for each, and
The IP measurement step for measuring the communication quality value of the IP communication path, and
A communication path quality determination step for determining the total communication path quality by combining the communication quality value of the wireless communication path and the communication quality value of the corresponding IP communication path, and
It is a computer program for executing a control step of transmitting video data to the video receiving device using the plurality of IP communication paths.
The control step selects the IP channel to transmit the video data based on the overall channel quality and the importance of the video data.
It ’s a computer program ,
The video data transmitted by the video transmission device to the video receiving device is image data captured by a plurality of video cameras provided in the moving body and is used for remote operation of the moving body.
The importance of the video data of each video camera changes according to the driving situation of the moving body.
Computer program.

Images