CN108684012B - Vehicle-mounted communication method, readable storage medium and vehicle-mounted terminal - Google Patents
Vehicle-mounted communication method, readable storage medium and vehicle-mounted terminal Download PDFInfo
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- CN108684012B CN108684012B CN201810396526.4A CN201810396526A CN108684012B CN 108684012 B CN108684012 B CN 108684012B CN 201810396526 A CN201810396526 A CN 201810396526A CN 108684012 B CN108684012 B CN 108684012B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
Abstract
Through the vehicle-mounted communication method designed by the invention, the data transmission mode can be selected according to the current signal intensity, so that a user can communicate with the LIFI device on the road in a high-speed driving road, particularly in places with poor mobile signals, the stability of signal transmission is improved, the communication rate of conversation and data is increased, and the experience of the user is improved.
Description
Technical Field
The present invention relates to a communication method, and more particularly, to a vehicle-mounted communication method, a computer-readable storage medium, and a vehicle-mounted terminal.
Background
LiFi is the abbreviation of Light Fidelity, a brand new wireless data transmission technology developed by great physicist Harrad-Haas in England, and the whole process can be completed by using common lighting. The user has also opened an internet connection while turning on the room lights. This device, known as LiFi, can be used to transmit wireless data from the "white space" television band or unused satellite signals. The invention transmits data by changing the frequency of the room lighting, the data transmitted per second is more than 10Mb, and the invention is comparable with the typical broadband connection.
When the vehicle runs at a high speed, the mobile phone inevitably generates unstable signals due to the Doppler effect. For example, when traveling at high speed, calls are often made intermittently, or when switching between cellular base stations is often unstable. Due to the rise of the current LIFI technology, the LIFI can bear certain data transmission functions. The LIFI technology can be quickly applied to the environment such as a highway and the like. At present, how to design a method for keeping stable information data transmission in driving is urgent and unpredictably.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art.
Therefore, the invention aims to design a vehicle-mounted communication method, so that a user can communicate with an LIFI device on a road in a high-speed driving road, particularly in some places with poor mobile signals, the stability of signal transmission is improved, the communication rate of conversation and data is increased, and the experience of the user is improved.
In order to achieve the above object, the present invention provides a vehicle-mounted communication method, including:
judging the current mobile service signal intensity of the mobile terminal;
if the mobile service signal strength is less than or equal to a preset signal strength threshold value, performing data communication in a first communication mode; and if the mobile service signal strength is greater than a preset signal strength threshold value, performing data communication in a second communication mode.
Further, before the step of determining the current mobile signal strength, the method further includes:
receiving a data sending command, and judging a mode corresponding to the data sending command; and judging the mobile service signal strength of the corresponding mode.
Further, the first communication mode is that the mobile terminal performs data communication with a LIFI transceiver in a driving road through a vehicle-mounted LIFI module, and the LIFI module in the driving road is connected with the cellular base station and/or the server.
Further, the second communication mode is that the mobile terminal performs connection communication through a cellular base station.
Further, the LIFI transceiver in the driving road is connected with the cellular base station and/or the server in a wired or wireless mode.
Further, the judging the current mobile service signal strength of the mobile terminal specifically includes:
the mobile terminal calculates the power intensity of the currently received signal;
the received signal power strength is the signal power sent by the cellular base station minus the loss power.
Further, the power loss calculation formula is as follows:
FSL＝32.44+20lgD(km)+20lgF(mhz)；
wherein D is a transmission distance with a unit of km; f is the transmission frequency in mhz.
Further, the signal strength threshold is-95 to-85 dBm.
The second aspect of the present invention also provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, performs the steps of the above-mentioned method.
The third aspect of the present invention further provides a vehicle-mounted terminal, which includes a processor and a memory storing an executable program executed by the processor, wherein the processor executes the executable program to perform the steps of the method.
Through the vehicle-mounted communication method designed by the invention, the data transmission mode can be selected according to the current signal intensity, so that a user can communicate with the LIFI device on the road in a high-speed driving road, particularly in places with poor mobile signals, the stability of signal transmission is improved, the communication rate of conversation and data is increased, and the experience of the user is improved.
Drawings
FIG. 1 is a flow chart illustrating a vehicle communication method according to the present invention;
FIG. 2 shows a schematic diagram of an embodiment of the present invention;
fig. 3 shows a schematic diagram of an embodiment of the invention.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as specifically described herein, and thus the scope of the present invention is not limited by the specific embodiments disclosed below.
Fig. 1 shows a schematic flow diagram of a vehicle communication method according to the present invention.
As shown in fig. 1, the present invention provides a vehicle-mounted communication method, including:
judging the current mobile service signal intensity of the mobile terminal;
if the mobile service signal strength is less than or equal to a preset signal strength threshold value, performing data communication in a first communication mode; and if the mobile service signal strength is greater than a preset signal strength threshold value, performing data communication in a second communication mode.
In addition, a vehicle-mounted light transmission module that transmits a modulated optical signal in the form of light and a vehicle light reception module, that is, an LIFI module, exist in a vehicle, and the vehicle-mounted light reception module performs demodulation processing after receiving the optical signal to extract effective information.
It should be noted that the mobile terminal may be a mobile communication-capable device such as a mobile phone and a PAD, and may perform communication and data exchange through wireless communication technologies such as 2G, 3G, 4G, 5G, WIMAX.
The signal strength of the current mobile service is worth of voice call service or data exchange service, and because in some areas, the signals of 3G, 4G and 5G are weaker, but smooth call can be carried out, a user can have better call quality if the user selects the voice call service; however, if the user selects the 3G, 4G, or 5G data exchange service, for example, the user wants to use the 4G network to surf the internet, the current area cannot surf the internet because the 4G signal is weak. Therefore, aiming at the situation, the invention can be realized by judging different current service signal strengths, and the user experience can be better improved.
According to the embodiment of the present invention, before the step of determining the current mobile signal strength, the method further includes:
receiving a data sending command, and judging a mode corresponding to the data sending command; and judging the mobile service signal strength of the corresponding mode. For example, if the user selects a voice call service and needs to send a voice data packet, the mobile terminal may determine the signal strength according to the corresponding voice service.
It should be noted that this step is not a necessary step. The user may perform this step after selecting the corresponding service instruction. The mobile terminal can also detect the signal strength in real time and in a fixed period. The skilled person can set different methods for detecting signal strength according to actual needs, but any solution that can achieve the function of the present invention will fall into the scope of the present invention.
According to the embodiment of the invention, the first communication mode is that the mobile terminal carries out data communication with the LIFI transceiver in the driving road through the vehicle-mounted LIFI module, and the LIFI module in the driving road is connected with the cellular base station and/or the server.
It should be noted that a corresponding LIFI module needs to be set in a driving road, for example, the LIFI module may be set in a lower structure or an upper structure of a street lamp, so as to send and receive LIFI data; and a LIFI module can be specially arranged in the driving road to transmit and receive LIFI data. The first communication mode is to perform data transfer through the LIFI module in the driving road when the signal strength is weak, and communicate with the cellular base station or the server, so as to achieve the purpose of data transmission. The LIFI transceiver in the driving road is connected with the cellular base station and/or the server in a wired or wireless mode. When wired connection is adopted, the stability of signal transmission can be ensured, and the interference from the outside is small; however, the cost of wiring and the like is high. When wireless transmission is used, the cost of wiring can be reduced, but the wireless signal is attenuated by external interference, such as shelter and weather. Those skilled in the art may be provided with wired or wireless connections depending on actual needs and geographic circumstances. When receiving data, the data sent by the base station or the server are received and then sent to the vehicle-mounted LIFI device through the LIFI device, and mutual transmission of the data is completed.
It should be noted that all the LIFI devices on the road are controlled by one or more controllers for performing the coordination and forwarding control operations of data.
According to the embodiment of the invention, the second communication mode is that the mobile terminal performs connection communication through a cellular base station.
It should be noted that, the second communication mode is a communication mode in which the signal strength meets the relevant requirements, and a smooth call and an error-free data transmission can be achieved. Specifically, the mobile terminal performs connection communication through a cellular base station.
According to the embodiment of the present invention, the determining the current mobile service signal strength of the mobile terminal specifically comprises:
the mobile terminal calculates the power intensity of the currently received signal;
the received signal power strength is the signal power sent by the cellular base station minus the loss power.
Further, the power loss calculation formula is as follows:
FSL＝32.44+20lgD(km)+20lgF(mhz)；
wherein D is a transmission distance with a unit of km; f is the transmission frequency in mhz.
Further, the signal strength threshold is-95 to-85 dBm. The intensity threshold range is obtained through a large amount of experimental data, when the intensity threshold range is less than-95, communication and data transmission are greatly interfered, normal and effective communication cannot be realized, and near-85, the situation of data intermittence often occurs, and the communication quality is seriously influenced.
In determining signal strength. The unit of the judged signal strength is dBm. Wherein, the signal is between-40 and-90, and the call is not disconnected; signals between-90 and-100 may be dropped; after-100, the line must be dropped.
The specifications of the china mobile stipulate that when the mobile phone receiving level > is-90 dBm in the city and-94 dBm in the countryside, the coverage requirement is satisfied, that is, the wireless signal strength here satisfies the coverage requirement.
67dBm is more than 20 dB stronger than the-90 dBm signal, so it is much better at both call completion success rate and voice quality during conversation (including, of course, those at EDGE/GPRS network speeds)
The inventors of the present invention have found that when the free space signal path propagation loss is FSL ═ 32.44+20lgd (km) +20lgf (mhz), the power loss value can be calculated well. Wherein D is a transmission distance with a unit of km; f is the transmission frequency in mhz. Further, the signal strength threshold is-95 to-85 dBm. Within the range of the intensity threshold, the problem of switching between modes can be solved well, and the smoothness of conversation and data can be ensured.
Wherein the received signal power RSCP is the base station power-loss power; the loss power is the free space signal path propagation loss described above. For example:
the transmit power of a certain base station antenna port is 30dBm (1w), we test at places other than 100m, and the RSCP received by our mobile terminal is 30- (32.4+20 × lg (100/1000) +20 × lg (2000)). RSCP-48.2 dBm.
When calculating the signal strength of the mobile terminal, the judgment can be made according to the received signal power. And choosing a signal strength threshold of-95 to-85 dBm is a preferred choice.
Example one
As shown in fig. 2, a corresponding LIFI module is provided in a driving road of an expressway, wherein the LIFI module is provided in a lower structure of a street lamp to transmit and receive LIFI data.
When a user drives on an expressway, the user selects to make a telephone call for a small number by adopting a voice or manual control touch key mode, and the mobile terminal judges that the voice call is a one-way voice service according to the instruction content, so that the signal intensity corresponding to the voice service is judged, and the range that the signal intensity is-50 dBm and is greater than the signal intensity threshold value and is-95-85 dBm is obtained. Therefore, it is indicated that the call quality is better at this time, the second communication mode, that is, the mobile terminal performs the connection communication through the cellular base station, that is, the normal communication mode, is adopted at this time. If the mobile terminal signal is weakened in the vehicle running process and is smaller than the range of-95 dBm to-85 dBm, a first communication mode is adopted, the first communication mode is that the mobile terminal carries out data communication with a LIFI transceiver in a driving road through a vehicle-mounted LIFI module, and the LIFI module in the driving road is connected with a cellular base station and/or a server. That is to say, the data is relayed through the LIFI module arranged in the road and transmitted to the base station or the server. When receiving data, the data sent by the base station or the server are received and then sent to the vehicle-mounted LIFI device through the LIFI device, and mutual transmission of the data is completed.
Example two
As shown in fig. 2-3, a corresponding LIFI module is provided in a driving road of an expressway, wherein the LIFI module is provided in a lower structure of a street lamp to transmit and receive LIFI data. The LIFI transceiver is arranged in the automobile lamp of the automobile and used for transmitting and receiving optical signals, transmitting the modulated optical signals and receiving the optical signals for demodulation operation. The mobile terminal of the user can be connected with the vehicle-mounted control computer or an external converter or a modem in a wired or wireless mode.
When a user drives on an expressway, a voice or manual control touch key mode is adopted, a calling party is selected, at the moment, the mobile terminal can judge that the voice service is a one-way voice service according to instruction content, so that the signal intensity corresponding to the voice service is judged, if the signal intensity is-96 dBm and is smaller than the range of-95 dBm to-85 dBm, a first communication mode is adopted, the mobile terminal carries out data communication with a LIFI transceiver in a driving road through a vehicle-mounted LIFI module, and the LIFI module in the driving road is connected with a cellular base station and/or a server. That is to say, the data is relayed through the LIFI module arranged in the road and transmitted to the base station or the server. When receiving data, the data sent by the base station or the server are received and then sent to the vehicle-mounted LIFI device through the LIFI device, and mutual transmission of the data is completed.
As shown in fig. 2, at this time, the voice information of the user is converted into data more specifically made by the vehicle-mounted control computer, or an external converter or a modem, and is converted into an optical signal, and then the optical signal is sent out by the LIFI module at the vehicle lamp, after the optical signal is received by the LIFI module at the street lamp in the road, the optical signal is forwarded to the connected cellular base station, and the cellular base station then forwards the received content data. The cellular base station forwards the downlink data to the LIFI module in the road, the LIFI module in the road converts the information into an optical signal and sends the optical signal to the LIFI device of the vehicle where the user is located, the LIFI device of the vehicle sends the signal to the vehicle-mounted control computer, and the control computer analyzes the data and sends the data to the mobile terminal.
It should be noted that all the LIFI devices on the road are controlled by one or more controllers for performing the coordination and forwarding control operations of data. As shown in fig. 3, for example, when the vehicle-mounted LIFI transmits a signal to the road LIFI apparatus a during driving, the road LIFI apparatus a cannot effectively transmit information to the vehicle-mounted LIFI apparatus when feeding back information due to driving, and when the vehicle is in the transmission range section of the road LIFI apparatus B, the controller selects the road LIFI apparatus B to transmit an optical signal. Through the coordination and control of the controller, the LIFI device of the vehicle can better receive the optical signal, the interruption of information communication cannot be caused, and the user experience is improved.
By the method, the data transmission mode can be selected according to the current signal strength, so that a user can communicate with the LIFI device on the road on a road running at high speed, particularly in places with poor mobile signals, the stability of signal transmission is improved, the communication rate of conversation and data is increased, and the experience of the user is improved.
In another aspect, the present invention also provides a computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of any of the methods described above.
The invention also provides a vehicle-mounted terminal, which comprises a processor and a memory, wherein the memory stores an executable program run by the processor, and the processor executes the steps of any one of the methods when running the executable program. The vehicle-mounted terminal can be electronic equipment such as a central controller and a mobile terminal of a vehicle.
The vehicle-mounted interconnection and intercommunication method designed by the invention can enable vehicles at intervals or in driving to communicate, and avoid road rage caused by misunderstanding. The lifi technology has the characteristic of one-way transmission, namely, data transmission can be carried out only in an illuminated place, so that the method can also be used for quickly positioning the vehicles of the opposite side needing to be communicated, so that the optical transmission module carries out optical signal transmission according to a specific direction, the vehicles of the opposite side can receive optical signals better, the embarrassment that other vehicles at the periphery receive the same optical signals due to too large light irradiation range can be avoided, and the effect of directional transmission is achieved.
It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. It should be understood that, in various embodiments of the present invention, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention. The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described device embodiments are merely illustrative, for example, the division of the unit is only a logical functional division, and there may be other division ways in actual implementation, such as: multiple units or components may be combined, or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the coupling, direct coupling or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection between the devices or units may be electrical, mechanical or other forms.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units; can be located in one place or distributed on a plurality of network units; some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, all the functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be separately regarded as one unit, or two or more units may be integrated into one unit; the integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
Those of ordinary skill in the art will understand that: all or part of the steps for realizing the method embodiments can be completed by hardware related to program instructions, the program can be stored in a computer readable storage medium, and the program executes the steps comprising the method embodiments when executed; and the aforementioned storage medium includes: various media that can store program codes, such as a removable Memory device, a Read Only Memory (ROM), a magnetic disk, or an optical disk.
Alternatively, the integrated unit of the present invention may be stored in a computer-readable storage medium if it is implemented in the form of a software functional module and sold or used as a separate product. Based on such understanding, the technical solutions of the embodiments of the present invention may be essentially or partially implemented in the form of a software product, which is stored in a storage medium and includes several instructions to enable a computer device (which may be a personal computer, a vehicle-mounted terminal, or a network device) to execute all or part of the methods described in the embodiments of the present invention. And the aforementioned storage medium includes: a removable storage device, a ROM, a magnetic or optical disk, or other various media that can store program code.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (3)
1. A vehicle-mounted communication method, comprising:
judging the current mobile service signal intensity of the mobile terminal;
if the mobile service signal strength is less than or equal to a preset signal strength threshold value, performing data communication in a first communication mode; if the mobile service signal strength is greater than a preset signal strength threshold value, performing data communication in a second communication mode;
before the step of judging the current mobile signal strength, the method further comprises the following steps: receiving a data sending command, and judging a mode corresponding to the data sending command; and judging the mobile service signal intensity of the corresponding mode;
the first communication mode is that the mobile terminal carries out data communication with an LIFI transceiver in a driving road through a vehicle-mounted LIFI module, and the LIFI module in the driving road is connected with a cellular base station and/or a server; the second communication mode is that the mobile terminal carries out connection communication through the cellular base station;
the specific steps of judging the current mobile service signal strength of the mobile terminal are as follows: the mobile terminal calculates the power intensity of the currently received signal;
the received signal power strength is the signal power sent by the cellular base station minus the loss power;
the loss power calculation formula is as follows: FSL ═ 32.44+20lgd (km) +20lgf (mhz);
wherein D is a transmission distance with a unit of km; f is transmission frequency, and the unit is mhz;
the signal intensity threshold is-95 to-85 dBm;
and the LIFI transceiver in the driving road is connected with the cellular base station and/or the server in a wired or wireless mode.
2. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method as claimed in claim 1.
3. A vehicle terminal comprising a processor, a memory storing an executable program for execution by the processor, wherein the processor executes the executable program to perform the steps of the method of claim 1.
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| CN106961706A (en) * | 2017-05-15 | 2017-07-18 | 深圳星联天通科技有限公司 | Method, mobile terminal and the computer-readable recording medium of communication pattern switching |
| CN107508635A (en) * | 2017-08-28 | 2017-12-22 | 苏州诚满信息技术有限公司 | A kind of intelligent city's Lighting Control Assembly and its method based on LIFI signals |
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| CN104270786A (en) * | 2014-10-16 | 2015-01-07 | 成都思迈科技发展有限责任公司 | Communication information switching method |
| EP3375112B1 (en) * | 2015-11-10 | 2019-12-18 | Fraunhofer Gesellschaft zur Förderung der angewandten Forschung E.V. | System and method for providing a wireless communication with a mobile device |
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| CN107508635A (en) * | 2017-08-28 | 2017-12-22 | 苏州诚满信息技术有限公司 | A kind of intelligent city's Lighting Control Assembly and its method based on LIFI signals |
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Effective date of registration: 20230518 Address after: No. 5000 Airport Road, Shiqi Street, Haishu District, Ningbo City, Zhejiang Province, 315000 (Room 602, No. 6, Building 7, Linkong Science and Technology Innovation Park) Patentee after: Zhejiang Madison Digital Technology Group Co.,Ltd. Address before: Room 601, 6 / F, building 7, Linkong science and Technology Innovation Park, no.5000 Airport Road, Haishu District, Ningbo City, Zhejiang Province, 315153 Patentee before: ZHEJIANG MADESEN INTELLIGENT TECHNOLOGY CO.,LTD. |
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