In-vehicle communication system and vehicle

Abstract

An in-vehicle communication system and a vehicle. The in-vehicle communication system comprises a first optical device, N second optical devices and an optical distribution network. The first optical device is used for sending a first optical signal to a second optical device i among the N second optical devices by means of the optical distribution network. The second optical device i is used for performing optical carrier recovery on a first optical signal i to obtain a first optical carrier i, performing modulation on the basis of the first optical carrier i to obtain a second optical signal i, and sending the second optical signal i to the first optical device by means of the optical distribution network.

Description

A vehicle-mounted communication system and a vehicle

[0001] Cross-reference to Related Applications

[0002] The present application claims priority to the application with the application number 202410544317.5, the patent name: A vehicle-mounted communication system and a vehicle, which was filed on April 30, 2024, in the China Patent Office, and the entire content of the application is incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the technical field of vehicle-mounted communication, in particular to a vehicle-mounted communication system and a vehicle. BACKGROUND

[0004] With the development of new technologies such as unmanned driving and intelligent transportation, and the increasing demand for in-vehicle audio and video entertainment, the performance of vehicle-mounted communication systems has gradually been valued by people.

[0005] Traditional vehicle-mounted communication systems are usually implemented based on Controller Area Network (CAN) bus, Local Interconnect Network (LIN) bus, etc. However, as the demand for autonomous driving and intelligent cockpit of automobiles continues to upgrade, the number of Electronic Control Units (ECUs) and the demand for computing power are growing exponentially, and the demand for real-time information transmission is also increasing. However, the bandwidth of traditional vehicle-mounted communication systems is limited, and because of the complexity of electromagnetic wave interference in the vehicle environment, the quality of signal transmission is also easily affected. Therefore, the communication bandwidth and communication quality of traditional vehicle-mounted communication systems have gradually failed to meet the use requirements of vehicles. TECHNICAL SOLUTION

[0006] The present application provides a vehicle-mounted communication system and a vehicle, which can solve the problem that the communication bandwidth and communication quality of traditional vehicle-mounted communication systems cannot meet the use requirements of vehicles.

[0007] In a first aspect, an embodiment of the present application provides a vehicle-mounted communication system. The vehicle-mounted communication system comprises a first optical device, N second optical devices, and an optical distribution network, the first optical device is connected to the N second optical devices through the optical distribution network, N is a positive integer greater than or equal to 1. The first optical device is configured to send a first optical signal i to a second optical device i in the N second optical devices through the optical distribution network. The second optical device i is configured to perform optical carrier recovery on the first optical signal i to obtain a first optical carrier i. The second optical device i is further configured to modulate a second optical signal i based on the first optical carrier i, and send the second optical signal i to the first optical device through the optical distribution network.

[0008] In a second aspect, the present application provides a vehicle comprising the vehicle-mounted communication system according to any one of the first aspect and the first aspect.

[0009] By implementing the embodiments of the present application, the vehicle-mounted communication system has high communication bandwidth and good communication quality, and has strong applicability and practicability in a vehicle-mounted communication scenario. Therefore, by using the vehicle-mounted communication system provided by the present application, the problem of poor applicability caused by low communication bandwidth and poor communication quality of the traditional vehicle-mounted communication system can be effectively solved. BRIEF DESCRIPTION OF DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0011] FIG. 1 is a structural schematic diagram of a vehicle-mounted communication system provided by the present application;

[0012] FIG. 2 is a structural schematic diagram of a second optical device provided by the present application;

[0013] FIG. 3 is another structural schematic diagram of a vehicle-mounted communication system provided by the present application;

[0014] FIG. 4 is another structural schematic diagram of a second optical device provided by the present application;

[0015] FIG. 5 is a structural schematic diagram of a first optical device provided by the present application;

[0016] FIG. 6 is another structural schematic diagram of a vehicle-mounted communication system provided by the present application;

[0017] FIG. 7 is another structural schematic diagram of a vehicle-mounted communication system provided by the present application;

[0018] FIG. 8 is another schematic diagram of a vehicle communication system according to the present application;

[0019] FIG. 9 is a schematic diagram of a vehicle according to an embodiment of the present application;

[0020] FIG. 10 is another schematic diagram of a vehicle according to an embodiment of the present application.

[0021] Embodiments of the present application

[0022] In order to enable those skilled in the art to better understand the scheme of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application.

[0023] The system architecture to which the embodiments of the present application are applied will be introduced below. It should be noted that the system architecture and business scenarios described in the present application are for more clearly illustrating the technical solutions of the present application, and do not constitute a limitation on the technical solutions provided by the present application. It should be understood that, as the system architecture evolves and new business scenarios appear, the technical solutions provided by the present application are also applicable to similar technical problems.

[0024] Traditional vehicle communication systems are usually implemented based on Controller Area Network (CAN) bus, Local Interconnect Network (LIN) bus, etc. However, as the demand for autonomous driving, intelligent cockpit, etc. of automobiles continues to upgrade, the number of Electronic Control Units (ECUs) and the demand for computing power are showing explosive growth, and the demand for real-time information transmission is also increasing. However, the bandwidth of traditional vehicle communication systems is limited, and because of the complexity of electromagnetic wave interference in the vehicle environment, the signal transmission quality is also easily affected. Therefore, the communication bandwidth and communication quality of traditional vehicle communication systems have gradually failed to meet the use requirements of vehicles.

[0025] Therefore, the technical problem to be solved by the present application is: how to improve the communication bandwidth and communication quality of the vehicle communication system.

[0026] To solve the above problems, the application provides a vehicle-mounted communication system. The vehicle-mounted communication system comprises a first optical device, N second optical devices and an optical distribution network. In actual work, the first optical device will send a first optical signal to each second optical device through the optical distribution network. Each second optical device of the N second optical devices will first perform optical carrier recovery based on the first optical signal received to obtain a corresponding first optical carrier, and then modulate the first optical carrier to obtain a corresponding second optical signal in the case of needing to send a second optical signal to the first optical device. On the one hand, since the vehicle-mounted communication system provided by the application, the optical carrier required by each second optical device is recovered from the first optical signal provided by the first optical device, i.e. there is no need to set up a light source in each second optical device, which can solve the problem that the second device is difficult to deploy due to high vehicle-mounted temperature, and ensure its applicability and practicality in the vehicle-mounted communication scene. On the other hand, since the vehicle-mounted communication system provided by the application is based on optical transmission, it not only can utilize the high-speed data stream formed by the optical carrier to meet the high-bandwidth communication demand, but also can avoid the communication quality decline caused by electromagnetic wave interference. Therefore, compared with the traditional vehicle-mounted communication system, the vehicle-mounted communication system provided by the application has better adaptability to the current vehicle-mounted environment, and has better communication quality and higher reliability. Therefore, by using the vehicle-mounted communication system provided by the application, the problem that the communication bandwidth and communication quality of the traditional vehicle-mounted communication system have gradually failed to meet the use demand of the vehicle can be solved.

[0027] Please refer to FIG. 1, which is a structure schematic diagram of a vehicle-mounted communication system provided by the application. As shown in FIG. 1, the vehicle-mounted communication system 100 can comprise a first optical device 10, N second optical devices and an optical distribution network 20. Wherein, N is a positive integer greater than or equal to 1. The N second optical devices can specifically comprise the second optical device 1, the second optical device i to the second optical device N shown in FIG. 1. The second optical device i can refer to any one of the N second optical devices. The first optical device 10 is connected with the N second optical devices through the optical distribution network 20 respectively.

[0028] In actual work, the first optical device 10 can be used to send N first optical signals to the N second optical devices through the optical distribution network 20 respectively. Here, the N first optical signals can comprise the first optical signal 1, the first optical signal i to the first optical signal N shown in FIG. 1. And it is assumed that the first optical signal 1 is sent to the second optical device 1, the first optical signal i is sent to the second optical device i, and so on, the first optical signal N is sent to the second optical device N.

[0029] It should be noted that in the scheme provided in the present application, the structure and function of each of the N second optical devices are similar, and in order to avoid redundancy, the structure and working principle of the N second optical devices provided in the present application will be described by taking any one of the N second optical devices (i.e., the second optical device i described above) as an example. The structure and function of other second optical devices except the second optical device i can be referred to the corresponding description of the second optical device i.

[0030] The second optical device i is configured to receive the first optical signal i from the optical distribution network 20, and perform optical carrier recovery on the first optical signal i to obtain a first optical carrier i corresponding to the first optical signal i. The second optical device i is also configured to modulate a second optical signal i based on the first optical carrier i, and send the second optical signal i to the optical distribution network 20, so as to send the second optical signal i to the first optical device through the optical distribution network 20.

[0031] For example, in actual work, for the second optical device 1, the first optical device 10 can send the first optical signal 1 to it through the optical distribution network 20. After receiving the first optical signal 1, the second optical device 1 will perform data erasure and optical carrier recovery on the first optical signal 1 to obtain the first optical carrier 1. Then, the second optical device 1 can generate the second optical signal 1 based on the first optical carrier 1, and send the second optical signal 1 to the first optical device through the optical distribution network 20.

[0032] In the vehicle-mounted communication system 100 provided in the present application, the optical carrier required by each second optical device is obtained by recovering the first optical signal provided by the first optical device 10, so that each second optical device does not need to set up a light source, which can solve the problem that the second device is difficult to deploy due to high vehicle-mounted temperature, and ensure its applicability and practicability in the vehicle-mounted communication scenario. Moreover, since the vehicle-mounted communication system 100 provided in the present application is based on optical transmission, not only can the high-speed data stream formed by the optical carrier be used to meet the high-bandwidth communication demand, but also the communication quality decline caused by electromagnetic wave interference can be avoided. Therefore, compared with the traditional vehicle-mounted communication system, the vehicle-mounted communication system 100 provided in the present application has better adaptability to the current vehicle-mounted environment, and has better communication quality and higher reliability. Therefore, by using the vehicle-mounted communication system 100 provided in the present application, the problem that the communication bandwidth and communication quality of the traditional vehicle-mounted communication system have gradually failed to meet the use demand of the vehicle can be solved.

[0033] In some possible implementation manners, the second optical device i comprises a first optical amplifier and a first optical modulator, and the first optical modulator is connected to the optical distribution network through the first optical amplifier. The first optical amplifier is configured to receive the first optical signal i from the optical distribution network, perform optical carrier recovery on the first optical signal i to obtain a first optical carrier i, and send the first optical carrier i to the first optical modulator. The first optical modulator is configured to modulate a second optical signal i based on the first optical carrier i, and send the second optical signal i to the optical distribution network through the first optical amplifier, so as to transmit the second optical signal i to the first optical device through the optical distribution network.

[0034] Referring to FIG. 2, FIG. 2 is a structural schematic diagram of a second optical device provided in the present application. As shown in FIG. 2, the second optical device i can comprise a first optical amplifier 301 and a first optical modulator 302. The first optical amplifier 301 is connected to the optical distribution network 20 at one end, and connected to the first optical modulator 302 at the other end. In other words, the first optical modulator 302 is connected to the optical distribution network through the first optical amplifier 301.

[0035] In actual implementation, the first optical amplifier 301 is configured to receive the first optical signal i from the optical distribution network 20, perform optical carrier recovery on the first optical signal i to obtain a first optical carrier i, and send the first optical carrier i to the first optical modulator 302. The first optical modulator 302 is configured to modulate a second optical signal i based on the first optical carrier i, and send the second optical signal i to the optical distribution network through the first optical amplifier 301, so as to transmit the second optical signal i to the first optical device 10 through the optical distribution network.

[0036] Optionally, referring to FIG. 2 together. As shown in FIG. 2, the second optical device i can further comprise a first signal processing device 303. The first signal processing device 303 is connected to the first optical modulator 302.

[0037] In actual implementation, when the second optical device i needs to send a second optical signal i to the first optical device 10, the first signal processing device 303 is configured to generate a first baseband signal, and send the first baseband signal to the first optical modulator 302. The first baseband signal carries first data provided by the second optical device i for the first optical device 10. The first optical modulator 302 is configured to modulate the first optical carrier i based on the first baseband signal to obtain the second optical signal i.

[0038] Optionally, in a possible implementation manner, the first optical amplifier comprises a reflective semiconductor optical amplifier (RSOA).

[0039] The first optical amplification device 301 can be a reflective semiconductor optical amplifier (RSOA). The RSOA has a low cost, and the gain saturation characteristic of the RSOA can be used to achieve data erasure of the signal light to achieve carrier recovery. Therefore, the first optical amplification device 301 is implemented by using the RSOA, and the implementation cost of the second optical device i can be reduced.

[0040] It should be understood that in actual implementation, the first optical amplification device 301 can also be implemented in other possible manners as long as it can achieve the above functions, and the present application does not make specific limitations in this regard.

[0041] In some possible implementation manners, referring to FIG. 3, FIG. 3 is another structural schematic diagram of a vehicle-mounted communication system provided by the present application. As shown in FIG. 3, the optical distribution network 20 is connected with each second optical device through at least two optical fibers. In other words, there are at least two optical paths between the optical distribution network 20 and each second optical device.

[0042] In a possible implementation manner, the first optical device is configured to generate and send a third optical signal to the optical distribution network. The optical distribution network is configured to decompose the third optical signal into N fourth optical signals and N first optical signals, send the N fourth optical signals to the N second optical devices respectively, and send the N first optical signals to the N second optical devices respectively, wherein the N first optical signals include the first optical signal i.

[0043] In actual implementation, the first optical device 10 is further configured to generate a third optical signal and send the third optical signal to the optical distribution network 20. The optical distribution network 20 is further configured to decompose the third optical signal into N fourth optical signals and the N first optical signals described above. Here, the N fourth optical signals can include the fourth optical signal 1, the fourth optical signal i to the fourth optical signal N shown in FIG. 3. The optical distribution network 20 is further configured to send the N fourth optical signals to the N second optical devices respectively, and send the N first optical signals to the N second optical devices respectively. Here, the N first optical signals include the first optical signal i. Moreover, it is assumed that the optical distribution network 20 sends the fourth optical signal 1 to the second optical device 1, sends the fourth optical signal i to the second optical device i, and so on, and sends the fourth optical signal N to the second optical device N.

[0044] It should be understood that since the N fourth optical signals and the N first optical signals are all obtained by splitting the third optical signal, the wavelengths of the fourth optical signals and the first optical signals are the same. Therefore, each second optical device needs to receive its corresponding fourth optical signal and first optical signal through different optical paths.

[0045] For example, the optical distribution network 20 splits the third optical signal into the fourth optical signal i and the first optical signal i, and sends the first optical signal i and the fourth optical signal i to the second optical device i through different optical paths.

[0046] Optionally, in a possible implementation, the optical power of each fourth optical signal in the N fourth optical signals is greater than the optical power of each first optical signal in the N first optical signals.

[0047] The optical power of each fourth optical signal in the N fourth optical signals is greater than the optical power of each first optical signal in the N first optical signals. Since the first optical signal is used for the second optical device to recover the optical carrier, and the fourth optical signal is used for the second optical device to receive data, the optical power of the fourth optical signal is set to be greater, which can ensure the signal receiving quality of each second optical device.

[0048] It should be understood that, in actual implementation, the optical power of each fourth optical signal can also be less than or equal to the optical power of each first optical signal, which is not limited in the present application.

[0049] Optionally, in a possible implementation, the second optical device i is further configured to receive the fourth optical signal i in the N fourth optical signals, and in a case where it is determined that the fourth optical signal i carries the device identifier of the second optical device i, process a first baseband signal based on the fourth optical signal i.

[0050] The second optical device i is further configured to receive the fourth optical signal i, and in a case where it is determined that the fourth optical signal i carries the device identifier of the second optical device i, process a first baseband signal based on the fourth optical signal i. Here, the first baseband signal carries the second data provided by the first optical device 10 for the second optical device i.

[0051] Optionally, referring to FIG. 4, FIG. 4 is another structural schematic diagram of the second optical device provided in the present application. As shown in FIG. 4, the second optical device i can further include a first photodetector 304 and a first demodulator 305. The first photodetector 304 is connected to the optical distribution network 20 and the first demodulator 305 respectively, and the first demodulator 305 is further connected to the first signal processing device 303.

[0052] In actual work, the first photodetector 304 is configured to receive the fourth optical signal i, process a first electrical signal based on the fourth optical signal i, and send the first electrical signal to the first demodulator 305. The first demodulator 305 is configured to demodulate the first electrical signal to obtain the second baseband signal described above, and send the second baseband signal to the first signal processing device 303. The first signal processing device 303 is configured to extract the first data carried on the second baseband signal.

[0053] In some possible implementation manners, the first optical device is further configured to receive M first optical signals from M second optical devices in the N second optical devices through the optical distribution network, the M second optical devices including the second optical device i, and M is a positive integer less than or equal to N.

[0054] The first optical device 10 is further configured to receive M first optical signals from M second optical devices in the N second optical devices through the optical distribution network. It should be understood that the M second optical devices include the second optical device i, and the M first optical signals include the first optical signal i. M is a positive integer less than or equal to N.

[0055] In a possible implementation manner, the transmission time of each of the M first optical signals is different.

[0056] It should be noted that, since the fourth optical signal and the second optical signal have the same wavelength, the second optical signal transmitted by each of the M second optical devices to the first optical device has the same wavelength. Therefore, the transmission time of each of the M first optical signals is different. That is, the M second optical devices can transmit the M second optical signals to the first optical device 10 in a time-division manner, and the first optical device 10 receives the M second optical signals at different times.

[0057] Optionally, referring to FIG. 5, FIG. 5 is a structural schematic diagram of a first optical device provided in the present application. As shown in FIG. 5, the first optical device 10 can include a second demodulator 101, a second photodetector 102, and a second signal processing device 103. The second photodetector 102 is connected to the optical distribution network 20 and the second demodulator 101 respectively, and the second demodulator 101 is further connected to the second signal processing device 103.

[0058] In actual implementation, when the second optical device i transmits the second optical signal i to the first optical device, the second photodetector 102 is configured to receive the second optical signal i, convert the second optical signal i to obtain a corresponding second electrical signal, and transmit the second electrical signal to the second demodulator 101. The second demodulator 101 is configured to demodulate the second electrical signal to obtain a first baseband signal, and transmit the first baseband signal to the second signal processing device 103. The second signal processing device 103 is configured to process the first baseband signal to obtain second data carried by the first baseband signal.

[0059] Optionally, as shown in FIG. 5, the first optical device 10 can further include a light source 104 and a second optical modulator 105.

[0060] In actual implementation, in the case that the first optical device 10 sends the third optical signal to the optical distribution network 20, the light source 104 is configured to generate and send a second optical carrier to the second optical modulator 105. The second signal processing device 103 is configured to generate and send a second baseband signal to the second optical modulator 105. The second optical modulator 105 is configured to modulate the second optical carrier based on the second baseband signal to obtain a third signal light, and send the third signal light to the optical distribution network 20.

[0061] It should be noted that, in the embodiments of the present application, the wavelength of the third optical signal is consistent with the wavelength of the second optical signal sent by each second optical device to the first optical device 10. Generally, the wavelength can be included between 850 nm and 1650 nm.

[0062] In some possible implementation manners, referring to FIG. 6, FIG. 6 is another structural schematic diagram of a vehicle-mounted communication system provided by the present application. As shown in FIG. 6, the optical distribution network 20 can include a first optical splitter 201. The first optical splitter 201 is connected with the first optical device 10 and the N second optical devices respectively.

[0063] In actual work, the first optical splitter 201 is configured to receive the third optical signal of the first optical device 10, split the third optical signal into N first optical signals and N fourth optical signals, and send the N first optical signals to the N second optical devices respectively, and send the N fourth optical signals to the N second optical devices respectively.

[0064] Alternatively, the first optical splitter 201 can be configured to receive the M second optical signals sent by each second optical device in the M second optical devices, and send the M second optical signals to the first optical device 10 respectively.

[0065] In a possible implementation manner, the optical distribution network includes a first optical splitter, the first optical splitter is connected with the first optical device, and the first optical splitter is further connected with a photodetector in the N second optical devices and an optical amplification device in the N second optical devices respectively.

[0066] It should be noted that, in the case that the first optical device 10 and the second optical device i adopt the structures shown in FIG. 5 and FIG. 4 respectively, the first optical splitter 201 can include one first end, N second ends and N third ends. The first end of the first optical splitter 201 is used to connect the first optical device 10. The N second ends of the first optical splitter 201 are respectively used to connect the photodetectors in the N second optical devices. For example, one of the second ends of the first optical splitter 201 is used to connect the first photodetector 304 in the second optical device i. The N third ends of the first optical splitter 201 are respectively used to connect the optical amplification devices in the N second optical devices. For example, one of the third ends of the first optical splitter 201 is used to connect the first optical amplification device 301 in the second optical device i. In actual work, the first optical splitter 201 can receive the M second optical signals sent by the M second optical devices through M of the N third ends, can send the N first optical signals to the N second optical devices through the N third ends, and can send the N fourth optical signals to the N second optical devices through the N second ends.

[0067] It should also be noted that, in the case that the optical distribution network 20 adopts the structure shown in FIG. 6, it can be understood that the vehicle-mounted communication system 100 adopts a tree-shaped PON network architecture. At this time, FIG. 1 to FIG. 6 are only illustrated by taking that the vehicle-mounted communication system 100 includes one PON network which includes the first optical device 10, the optical distribution network 20 and the N second optical devices. In actual implementation, in the case that the vehicle-mounted communication system 100 adopts a tree-shaped PON network architecture, it can include multiple PON networks, and the structures of the multiple PON networks can all be as shown in FIG. 1 to FIG. 6. In the case of multiple PON networks, the transmission bandwidths of each PON network can be the same or different. For example, each PON network adopts the same transmission bandwidth, and can all be n Gbps (where n is ≥ 1 Gbps), and the total bandwidth (or the highest bandwidth) of the vehicle-mounted communication system 100 is A = k1*n Gbps, where k1 is the number of PON networks in the vehicle-mounted communication system 100.

[0068] In some possible implementation manners, referring to FIG. 7, FIG. 7 is another structure of a vehicle-mounted communication system provided by the present application. As shown in FIG. 7, the optical distribution network 20 can include N second optical splitters, and the N second optical splitters are respectively connected with the N second optical devices. The N second optical splitters can include the second optical splitter 1, the second optical splitter i to the second optical splitter N shown in FIG. 7. Since the structures and functions of each of the N second optical splitters are similar, in order to avoid redundancy, the functions of the N second optical splitters will be described below by taking the second optical splitter i connected with the second optical device i as an example.

[0069] In one possible implementation, the optical distribution network includes N second optical splitters, each of which is connected to the N second optical devices. The second optical splitter i connected to the second optical device i is configured to split the received optical signal to obtain the first optical signal i and the fourth optical signal i, and other optical signals except the first optical signal i and the fourth optical signal i, transmit the first optical signal i and the fourth optical signal i to the second optical device i, and transmit the other optical signals except the first optical signal i and the fourth optical signal i back to the optical distribution network. The second optical splitter i is also configured to transmit the second optical signal i back to the optical distribution network.

[0070] In actual operation, after the third optical signal is transmitted to the optical distribution network 20, the second optical splitter i connected to the second optical device i in the N second optical splitters is configured to split the received optical signal to obtain the first optical signal i and the fourth optical signal i, and other optical signals except the first optical signal i and the fourth optical signal i. The second optical splitter i is also configured to transmit the first optical signal i and the fourth optical signal i to the second optical device i, and transmit the other optical signals except the first optical signal i and the fourth optical signal i back to the optical distribution network 20. It should be understood that the transmission direction of the other optical signals except the first optical signal i and the fourth optical signal i in the optical distribution network 20 is the same as that of the third optical signal. It should be understood that when the third optical signal is transmitted in the optical distribution network 20, each second optical splitter only splits one first optical signal and one fourth optical signal from the third optical signal, and transmits them to the second optical device connected thereto, while the remaining part of the third optical signal continues to be transmitted in the optical distribution network until it traverses all the second optical splitters.

[0071] For example, in actual operation, for the second optical splitter 1 connected to the second optical device 1, it only splits the first optical signal 1 and the fourth optical signal 1 from the third optical signal, transmits the first optical signal 1 and the fourth optical signal 1 to the second optical device 1, and transmits the remaining part of the third optical signal back to the optical distribution network 20, so that the next second optical splitter adjacent thereto can receive the signal light and split new first optical signals and new fourth optical signals. In this way, the second optical splitter N splits the first optical signal N and the fourth optical signal N from the third optical signal, and transmits the first optical signal N and the fourth optical signal N to the second optical device N. At this point, the optical distribution network 20 completes the operation of transmitting N first optical signals and N fourth optical signals to N second optical devices.

[0072] Further, the second optical splitter i can also be used to receive the second optical signal i transmitted by the second optical device i, and transmit the second optical signal i back to the optical distribution network 20, so that the second optical signal i can continue to be transmitted in the transmission direction of the third signal light until it is transmitted to the first optical device 10.

[0073] Further, in a possible implementation, the N second optical splitters are connected in series by a plurality of optical fibers to form the optical distribution network, and two ends of the N second optical splitters connected in series are connected to the first optical device by or as two ends of the optical distribution network.

[0074] Please continue to refer to FIG. 7. As shown in FIG. 7, the N second optical splitters can be connected in series by a plurality of optical fibers to form the optical distribution network 20, and two ends of the N second optical splitters connected in series are connected to the first optical device 10 by or as two ends of the optical distribution network 20. As shown in FIG. 7, the first optical splitter 1 and the first optical splitter N are connected to the first optical device 10 by or as two ends of the optical distribution network 20. That is, the N second optical splitters and the first optical device constitute a ring-shaped optical channel, and the N second optical devices are connected to the ring-shaped optical channel through the N second optical splitters, thereby forming a ring-shaped PON network. In other words, in this case, the vehicle-mounted communication system 100 adopts a ring-shaped PON network architecture. Here, the ring-shaped PON network architecture not only serves as a redundant design, but also effectively balances and accelerates the transmission of high-speed data streams.

[0075] In some possible implementations, please refer to FIG. 8, which is another structural schematic diagram of the vehicle-mounted communication system provided by the present application. As shown in FIG. 8, the vehicle-mounted communication system 100 can further include a vehicle-mounted controller 40. The vehicle-mounted controller 40 is connected to the first optical device 10. Specifically, the vehicle-mounted controller 40 is connected to the second signal processing device 103 in the first optical device 10.

[0076] In actual work, after receiving the first baseband signal from the second demodulator 101, the second signal processing device 103 can also be used to filter, amplify and process the first baseband signal to obtain second data carried on the first baseband signal, and transmit the second data to the vehicle-mounted controller 40, so that the vehicle-mounted controller 40 can obtain the second data.

[0077] Optionally, the vehicle-mounted controller 40 can also be used to transmit first data to the second signal processing device 103. The second signal processing device 103 can be used to generate the second baseband signal based on the first data.

[0078] It should be noted that the vehicle-mounted controller 40 provided by the present application can be any device or apparatus capable of controlling a vehicle, such as an IVC300 controller.

[0079] In some possible implementation manners, the vehicle-mounted communication system further comprises a vehicle-mounted device connected with the second optical device i. The vehicle-mounted device is configured to provide a second baseband signal for the second optical device i, and the second baseband signal is used by the second optical device i to generate the second optical signal i. Alternatively, the vehicle-mounted device is configured to receive a first baseband signal from the second optical device i, and the first baseband signal is processed by the second optical device i based on a fourth optical signal i from the optical distribution network.

[0080] As shown in FIG. 8, the vehicle-mounted communication system 100 further comprises a vehicle-mounted device 50 connected with the second optical device i, and specifically, the vehicle-mounted device is connected with the first signal processing device 303 in the second optical device i.

[0081] In actual work, the vehicle-mounted device 50 is configured to transmit second data to the first signal processing device 303. The first signal processing device 303 is configured to generate the first baseband signal described above based on the second data.

[0082] Optionally, the first signal processing device 303 is further configured to filter, amplify and process the received second baseband signal to obtain first data, and transmit the first data to the vehicle-mounted device 50, so that the vehicle-mounted device 50 can obtain the first data.

[0083] It should be noted that, in the embodiments of the present application, the vehicle-mounted device 50 can be any form of electronic device capable of communication, such as a camera, a display, a laser radar, a sound, a vehicle-mounted navigator, a vehicle event data recorder, a smart sensor, etc. The embodiments of the present application do not limit the implementation form of the vehicle-mounted device 50.

[0084] It should be further noted that, in FIG. 8, the vehicle-mounted communication system 100 is exemplarily described as comprising one vehicle-mounted device 50, and the vehicle-mounted device 50 is connected with the second optical device i. In actual implementation, the vehicle-mounted communication system 100 can further comprise one or more vehicle-mounted devices other than the vehicle-mounted device 50, and the one or more vehicle-mounted devices can be connected with one or more second optical devices other than the second optical device i. The functions between the one or more vehicle-mounted devices and the one or more second optical devices are similar to the functions between the vehicle-mounted device 50 and the second optical device i described above, and thus the description is not repeated here to avoid redundancy.

[0085] It should be further noted that, the light source (such as the light source 104 described above) provided by the embodiments of the present application can be various forms of lasers or other light source devices, and the embodiments of the present application do not limit the implementation form.

[0086] The photoelectric detector involved in the present application can be a silicon-based silicon germanium process photodiode or avalanche photodiode, or can be a photodiode or avalanche photodiode based on III-V semiconductor. It should be understood that this is only illustrative, and in actual implementation, the photoelectric detector involved in the present application can also be implemented in other manners as long as it can be applied to the technical solutions provided in the present application. The optical modulator involved in the present application can be a silicon-based optical modulator, or can be a lithium niobate-based optical modulator, and the present application does not limit this.

[0087] The present application also provides a vehicle, please see Figure 9, Figure 9 is a vehicle structure schematic diagram provided by an embodiment of the present application. As shown in Figure 9, the vehicle 200 can include the vehicle-mounted communication system 100 described in the above embodiments. The vehicle 200 can realize internal communication through the vehicle-mounted communication system 100.

[0088] It should be understood that in actual implementation, the vehicle 200 can also include a plurality of wheels, a seat, a vehicle-mounted power supply, electrical equipment, the vehicle-mounted controller 40 described above, vehicle-mounted equipment 50, etc.

[0089] Optionally, please see Figure 10, Figure 10 is another structure schematic diagram of a vehicle provided by an embodiment of the present application. As shown in Figure 10, the vehicle 200 can also include a central computing component 210. The first optical device 10 in the vehicle-mounted communication system 100 can be arranged around the central computing component 210. In this way, the light source (such as the light source 104 described above) in the first optical device 10 can be cooled by the semiconductor cooler TEC or water cooling system of the central computing component 210, thereby avoiding the influence of the high temperature of the vehicle-mounted environment on the performance of the light source in the first optical device 10.

[0090] In the present application, some devices or functional devices in the vehicle-mounted communication system 100 can be connected by waveguide light. Optionally, the waveguide can be an optical fiber. Illustratively, the optical fiber can be a special optical and electrical composite cable, which can provide communication function and power supply function in the vehicle-mounted communication system 100. The optical fiber can be a single-mode optical fiber, a multi-mode optical fiber, a plastic optical fiber, etc. The present application does not specifically limit the implementation form of the waveguide.

[0091] In the present application, some devices or functional devices in the vehicle-mounted communication system 100 can also be connected by a circuit. Optionally, the circuit can be a circuit integrated on a circuit board, or can be a communication cable. The present application does not specifically limit the implementation form of the circuit.

[0092] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps is not limited to the steps listed, but may optionally include steps not listed, or may optionally include other steps inherent to these processes, methods, products, or apparatuses.

[0093] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0094] Although this application has been described herein in conjunction with various embodiments, those skilled in the art, by reviewing the accompanying drawings, the disclosure, and the appended claims, will understand and implement other variations of the disclosed embodiments in carrying out this application. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude multiple instances. While different dependent claims may recite certain measures, this does not imply that these measures cannot be combined to produce a good effect.

[0095] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principle and implementation of an in-vehicle communication system and vehicle provided by this application. The descriptions of the embodiments above are intended to help understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​an in-vehicle communication system and vehicle provided by this application. Therefore, the content of this specification should not be construed as a limitation of this application.

[0096] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this application. It should be understood that the above description is only a specific embodiment of this application and is not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made on the basis of the technical solution of this application should be included within the scope of protection of this application.

Claims

1. A vehicle-mounted communication system, wherein, The vehicle-mounted communication system comprises a first optical device, N second optical devices and an optical distribution network, the first optical device is connected with the N second optical devices through the optical distribution network, N is a positive integer greater than or equal to 1; The first optical device is configured to send a first optical signal i to a second optical device i in the N second optical devices through the optical distribution network; The second optical device i is configured to perform optical carrier recovery on the first optical signal i to obtain a first optical carrier i; and The second optical device i is further configured to modulate a second optical signal i based on the first optical carrier i and send the second optical signal i to the first optical device through the optical distribution network.

2. The in-vehicle communication system according to claim 1, wherein The second optical device i comprises a first optical amplifier and a first optical modulator, the first optical modulator is connected with the optical distribution network through the first optical amplifier; The first optical amplifier is configured to receive the first optical signal i from the optical distribution network, perform optical carrier recovery on the first optical signal i to obtain a first optical carrier i, and send the first optical carrier i to the first optical modulator; and The first optical modulator is configured to modulate a second optical signal i based on the first optical carrier i and send the second optical signal i to the optical distribution network through the first optical amplifier, so as to send the second optical signal i to the first optical device through the optical distribution network. The first optical amplifier comprises a reflective semiconductor optical amplifier (RSOA).

3. The in-vehicle communication system according to claim 2, wherein The first optical device is configured to generate and send a third optical signal to the optical distribution network; 4. The in-vehicle communication system according to any one of claims 1-3, wherein, The optical distribution network is configured to decompose the third optical signal to obtain N fourth optical signals and N first optical signals, send the N fourth optical signals to the N second optical devices respectively, and send the N first optical signals to the N second optical devices respectively, wherein the N first optical signals comprise the first optical signal i. The optical power of each fourth optical signal in the N fourth optical signals is greater than the optical power of each first optical signal in the N first optical signals.

5. The in-vehicle communication system according to claim 4, wherein The second optical device i is further configured to receive a fourth optical signal i in the N fourth optical signals, and when it is determined that the fourth optical signal i carries a device identifier of the second optical device i, process a first baseband signal based on the fourth optical signal i.

6. The in-vehicle communication system according to claim 4 or 5, wherein The first optical device is further configured to receive M first optical signals from M second optical devices in the N second optical devices through the optical distribution network, the M second optical devices comprise the second optical device i, and M is a positive integer less than or equal to N.

7. The in-vehicle communication system according to any one of claims 4-6, wherein, The transmission time of each first optical signal in the M first optical signals is different.

8. The in-vehicle communication system according to claim 7, wherein The optical distribution network comprises a first optical splitter, the first optical splitter is connected with the first optical device, and the first optical splitter is further connected with a photodetector in the N second optical devices and an optical amplifier in the N second optical devices respectively.

9. The vehicle-mounted communication system according to any one of claims 4-8, wherein, The optical distribution network comprises N second optical splitters, the N second optical splitters are connected with the N second optical devices respectively; 10. The in-vehicle communication system according to any one of claims 4-8, wherein, ​ The second optical splitter i connected with the second optical device i among the N second optical splitters is configured to split the received optical signal to obtain the first optical signal i and the fourth optical signal i and other optical signals except the first optical signal i and the fourth optical signal i, transmit the first optical signal i and the fourth optical signal i to the second optical device i, and transmit the other optical signals except the first optical signal i and the fourth optical signal i back to the optical distribution network. The second optical splitter i is further configured to transmit the second optical signal i back to the optical distribution network.

11. The in-vehicle communication system according to claim 10, wherein The N second optical splitters are connected in series by a plurality of optical fibers to form the optical distribution network, and two ends of the N second optical splitters connected in series are connected with the first optical device as two ends of the optical distribution network.

12. The vehicle-mounted communication system according to any one of claims 1-11, wherein, The vehicle-mounted communication system further comprises a vehicle-mounted device connected with the second optical device i. The vehicle-mounted device is configured to provide a second baseband signal for the second optical device i, the second baseband signal being used by the second optical device i to generate the second optical signal i. And / or, The vehicle-mounted device is configured to receive a first baseband signal from the second optical device i, the first baseband signal being processed by the second optical device i based on the fourth optical signal i from the optical distribution network.

13. A vehicle, wherein, The vehicle comprises the vehicle-mounted communication system according to any one of claims 1-12.

14. The vehicle of claim 13, wherein, The first optical device in the vehicle-mounted communication system is arranged around a central computing component. The vehicle-mounted communication system further comprises a vehicle-mounted device connected with the second optical device i. The vehicle-mounted device is configured to provide a second baseband signal for the second optical device i, the second baseband signal being used by the second optical device i to generate the second optical signal i. And / or, The vehicle-mounted device is configured to receive a first baseband signal from the second optical device i, the first baseband signal being processed by the second optical device i based on the fourth optical signal i from the optical distribution network. The vehicle comprises the vehicle-mounted communication system according to any one of claims 1-12. The first optical device in the vehicle-mounted communication system is arranged around a central computing component.

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