WO2016202234A1 - 通讯方法和终端 - Google Patents

通讯方法和终端 Download PDF

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Publication number
WO2016202234A1
WO2016202234A1 PCT/CN2016/085665 CN2016085665W WO2016202234A1 WO 2016202234 A1 WO2016202234 A1 WO 2016202234A1 CN 2016085665 W CN2016085665 W CN 2016085665W WO 2016202234 A1 WO2016202234 A1 WO 2016202234A1
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WIPO (PCT)
Prior art keywords
terminal
speed information
power value
information
speed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2016/085665
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English (en)
French (fr)
Inventor
张军
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to EP16810975.9A priority Critical patent/EP3294013A4/en
Publication of WO2016202234A1 publication Critical patent/WO2016202234A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/16—Anti-collision systems
    • G08G1/161—Decentralised systems, e.g. inter-vehicle communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/28—TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non-transmission
    • H04W52/282—TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non-transmission taking into account the speed of the mobile
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/28—TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non-transmission
    • H04W52/283—Power depending on the position of the mobile
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/38—TPC being performed in particular situations
    • H04W52/383—TPC being performed in particular situations power control in peer-to-peer links
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • H04W64/006—Locating users or terminals or network equipment for network management purposes, e.g. mobility management with additional information processing, e.g. for direction or speed determination
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks

Definitions

  • the present invention relates to the field of communications, and in particular, to a communication method and a terminal.
  • V2V Vehicle-to-Vehicle
  • DSRC Dedicated Short Range Communications
  • each channel adopts a fixed transmission power value and a fixed direction transmission signal, so that the vehicle causes signal interference when the vehicle is concentrated at a low speed; The coverage of the transmitted signal does not meet the safety distance requirements.
  • the embodiment of the invention provides a communication method and system for dynamically adjusting the power value of a channel transmission signal, and dynamically adjusting the power value of the transmission signal to meet the requirement of safe driving.
  • an embodiment of the present invention provides a communication method, where the method includes: determining, by a first terminal, a distance from a second terminal; the first terminal receiving second speed information sent by the second terminal, The second speed information is the current speed information of the second terminal; the first terminal determines the power value according to the distance, the second speed information, and the first speed information of the first terminal, where The first speed information is current speed information of the first terminal; the first terminal sends a signal to the second terminal according to the power value.
  • the first terminal determines, according to the distance, the second speed information, and the first speed information of the first terminal,
  • the rate value includes: the road surface parameter information sent by the roadside unit device received by the first terminal, where the roadside unit device is a communication device disposed on the road side; the first terminal according to the road surface parameter information And adjusting the power value; the first terminal sends the signal to the second terminal according to the adjusted power value.
  • the road surface parameter information includes a braking distance, and the power value is proportional to the braking distance.
  • the determining, by the first terminal, the distance from the second terminal includes: acquiring, by the first terminal, the first location of the first terminal The first terminal receives the second location information sent by the second terminal; the first terminal determines the first terminal and the second terminal according to the first location information and the second location information the distance.
  • the first terminal determines a power value according to the distance, the second speed information, and the first speed information of the first terminal, where The first terminal determines, according to the second speed information and the first speed information, relative speed information of the first terminal and the second terminal; the first terminal according to the distance and the location The relative speed information is described to determine the power value.
  • the determining, by the first terminal, the adjusted power value according to the road surface parameter information sent by the received roadside unit device includes: The first terminal determines relative speed information of the first terminal and the second terminal according to the second speed and the first speed; the first terminal according to the distance, the relative speed The information and the road surface parameter information are adjusted to adjust the power value.
  • the distance is proportional to the power value.
  • the relative speed is proportional to the power value.
  • the terminal includes: a determining module, configured to determine a distance from the second terminal; and a receiving module, configured to receive second speed information sent by the second terminal, where the second speed information is the The current speed information of the second terminal; the determining module is further configured to determine a power value according to the distance, the second speed information, and the first speed information of the terminal, where the first speed information is a current speed information of the first terminal; a sending module, configured to send a signal to the second terminal according to the power value.
  • the device further includes an adjustment module, where the receiving module is further configured to receive road surface parameter information sent by the roadside unit device, where The roadside unit device is a communication device disposed on the road side; the adjustment module is configured to adjust the power value according to the road surface parameter information; the sending module is further configured to: according to the adjusted power value
  • the second terminal transmits the signal.
  • the terminal further includes an acquiring module, where the acquiring module is configured to acquire the first terminal a location information; the receiving module is further configured to receive second location information that is sent by the second terminal, where the determining module is further configured to determine, according to the first location information and the second location information, The distance between a terminal and the second terminal.
  • the determining module is specifically configured to determine, according to the second speed information and the first speed information, the first terminal and the second terminal Relative speed information; determining the power value based on the distance and the relative speed information.
  • the determining module is specifically configured to determine, according to the second speed and the first speed, Determining the relative speed information of the first terminal and the second terminal; the adjusting module is specifically configured to: adjust the power value according to the distance, the relative speed information, and the road surface parameter information.
  • the communication method of the embodiment of the present invention transmits the second location information and the second speed information by receiving the second terminal in real time, and the first terminal according to the second location information, the second speed information, and the first speed information of the first terminal First position information, determining the power value of the transmitted signal in real time, that is, moving The state adjusts the power value of the transmitted signal to meet the needs of safe driving.
  • FIG. 1 is a schematic flowchart of a communication method according to an embodiment of the present invention.
  • FIG. 2 is a schematic flowchart of a communication method according to another embodiment of the present invention.
  • FIG. 3 is a schematic interaction diagram of a communication method according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a terminal according to another embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a terminal according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a terminal according to another embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a terminal according to still another embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a terminal according to still another embodiment of the present invention.
  • a communication method and terminal provided by an embodiment of the present invention are specifically used for communication between a vehicle and a vehicle.
  • Vehicle-to-Vehicle V2V
  • the first terminal and the second terminal may be specifically an in-vehicle device provided with a vehicle-to-vehicle communication function or a vehicle equipped with an in-vehicle device with a vehicle-to-vehicle communication function, including: on-board diagnostics (English: On-Board Diagnostic, referred to as OBD)
  • OBD On-Board Diagnostic
  • the device is used for collecting data of the vehicle itself, for example: vehicle speed, direction angle, etc.; a Global Navigation Satellite System (GNSS) device for collecting navigation satellite signals and calculating vehicle position information.
  • GNSS Global Navigation Satellite System
  • the method further includes: a roadside unit (English: Road Side Unit, RSU for short), and the roadside unit device may be specifically a communication device disposed on the road side for collecting environmental parameter information, for example, road surface parameters. Car secret Parameter information such as degree.
  • the first terminal acquires parameter information sent by the second terminal and other devices in real time, and adjusts the power value of the signal sent by the first terminal in real time according to the parameter information to meet the requirement of safe driving.
  • FIG. 1 is a schematic flowchart of a communication method according to an embodiment of the present invention.
  • the method 100 shown in FIG. 1 can be performed by a first V2V terminal, the method comprising:
  • the first end determines a distance from the second terminal.
  • the first terminal receives the second speed information sent by the second terminal, where the second speed information is the current speed information of the second terminal.
  • the first terminal determines a power value according to the distance, the second speed information, and the first speed information of the first terminal, where the first speed information is current speed information of the first terminal.
  • the first terminal sends a signal to the second terminal according to the power value.
  • the first terminal receives the information sent by the second terminal, where the information includes the second location information, the second speed information, where the second location information may be the current location information of the second terminal, and the second The speed information may be the current speed information of the second terminal. Determining, by the first terminal, the power value according to the received information and the obtained first speed information and the location information of the first terminal; and sending, according to the power value, a signal to the second terminal, where the signal includes the first speed information of the first terminal, and First location information.
  • the information sent by the second terminal may further include a direction angle during the running of the second terminal, or other information of the second terminal, which is not limited in the present invention.
  • the determining, by the first terminal, the distance from the second terminal may include: acquiring first location information of the first terminal; and receiving second location information sent by the second terminal device; A location information and second location information determine a distance between the first terminal and the second terminal.
  • the first speed information is speed information of the current moment of the first terminal, and the first terminal acquires the stored first speed information, that is, its own speed information.
  • the on-board diagnostic OBD device is required to detect the first speed of the first terminal in real time, and send the detected first speed information to the first terminal, where the first terminal receives the first speed sent by the onboard diagnostic OBD device. And storing the first speed information. When the power value of the signal sent by the first terminal needs to be adjusted, the first terminal acquires the stored speed information of the current moment.
  • the first terminal determines, according to the distance between the first terminal and the second terminal, the second speed information, and the first speed information, a power value of the signal sent by the first terminal.
  • the signal includes first location information of the first terminal and first speed information, and the first terminal sends a signal according to the power value, after the second terminal receives the signal, and performs alarm processing according to the signal, that is, The second terminal performs processing according to the received signal, and performs an alarm when the preset alarm condition is reached; when the alarm condition is not reached, no alarm is generated.
  • determining the power value according to the distance, the second speed information, and the first speed information of the first terminal including: determining, according to the second speed and the first speed, the first terminal and the first The relative speed information of the two terminals; determining the power value according to the distance and relative speed information.
  • the first terminal determines, according to the distance between the first terminal and the second terminal, the relative speed information of the first terminal and the second terminal, the power value of the signal sent by the first terminal.
  • the power value is proportional to the distance.
  • the power value of the signal sent by the first terminal is proportional to the distance between the first terminal and the second terminal.
  • the power is proportional to the relative speed information.
  • the power value of the signal transmitted by the first terminal is proportional to the relative speed information of the first terminal and the second terminal.
  • the first terminal may be configured according to a distance between the first terminal and the second terminal, a maximum distance between the first terminal and the second terminal, and a relative speed of the first terminal and the second terminal, and a preset The maximum relative speed of a terminal and the second terminal, determining an impact factor; according to the impact factor Determining a theoretical power value of the signal sent by the first terminal with a preset maximum power value of the signal sent by the first terminal; selecting a larger value from the theoretical power value and a minimum power value of the preset first terminal transmitting signal The first terminal transmits the power value of the signal to meet the demand for vehicle communication during driving.
  • the power value of the signal sent by the first terminal MAX[Pmin,(v/Vmax)*(d/Dmax)*Pmax], where Pmin is the minimum transmit power value of the preset first terminal transmit signal, and v is The relative speed of the first terminal and the second terminal, Vmax is a preset maximum relative speed of the first terminal and the second terminal, d is a distance between the first terminal and the second terminal, and Dmax is a preset first V2V terminal and The maximum distance of the second V2V terminal, and Pmax is the maximum power value of the signal transmitted by the preset first terminal.
  • the distance between the first terminal and the second terminal, and the relative speed of the first terminal and the second terminal are main factors affecting the power value of the signal sent by the first terminal, when the first terminal acquires the first
  • the theoretical power value of the signal transmitted by the first terminal may be determined by (v/Vmax)*(d/Dmax)*Pmax;
  • the v/Vmax and/or d/Dmax influence factor is 0.
  • the first terminal when the first terminal just starts or does not receive the parameter information sent by the second terminal or other device, the first terminal sends a signal according to the preset initial power value.
  • the first terminal acquires the first speed information, that is, its own speed information, and determines the power value of the transmitted signal according to the obtained first speed information.
  • the first terminal may determine the speed scene according to the first speed information, and the speed scene may include: a low speed scene, a medium speed scene, and a high speed scene; and obtain a first speed information by querying a relationship table between the stored speed scene and the power value correspondence relationship.
  • the power value of the corresponding speed scene wherein, the power value may be greater than a preset initial power value.
  • the signal is sent to the second terminal according to the power value, where the signal includes: first location information of the first terminal, first speed information, and other parameter information;
  • the alarm processing is performed according to the first location information of the first terminal, the first speed information, and other parameter information.
  • the first terminal can dynamically adjust and transmit by its own speed.
  • the power value of the signal is sent to meet the needs of safe driving.
  • the first terminal may also adjust the power value of the transmitted signal by means of a curve simulation, or adjust the power value of the transmitted signal by other means.
  • the communication method of the embodiment of the present invention transmits the second location information and the second speed information by receiving the second terminal in real time, and the first terminal according to the second location information, the second speed information, and the first speed information of the first terminal
  • the first position information determines the power value of the transmitted signal in real time, that is, dynamically adjusts the power value of the transmitted signal to meet the requirement of safe driving.
  • the first terminal may also receive the road surface parameter information sent by the road surface unit device or the parameter information sent by other devices, which is not limited in the present invention.
  • determining a power value according to the distance, the second speed information, and the first speed information of the first terminal includes:
  • the first terminal receives the road surface parameter information sent by the roadside unit device, where the roadside unit device is a communication device disposed on the road side;
  • the first terminal adjusts the power value according to the road surface parameter information.
  • the first terminal sends a signal to the second terminal according to the adjusted power value.
  • the road surface unit device may be a communication function device disposed on the road side.
  • the first terminal receives road surface parameter information of the roadside unit device, and determines a power value of the signal transmitted by the first terminal according to the distance between the first terminal and the second terminal, the first speed information, the second speed information, and the road surface parameter information.
  • the first terminal may also receive the vehicle density information sent by the road surface unit device, or other environmental parameter information, which is not limited in the present invention.
  • adjusting the power value according to the road surface parameter information sent by the received roadside unit device specifically includes: determining a relative speed of the first terminal and the second terminal according to the second speed and the first speed. Information; adjust the power value based on distance, relative speed information, and road surface parameter information.
  • the road surface parameter information may include a braking distance, and the power value is proportional to the braking distance.
  • the braking distance is a distance that the first terminal travels when the user receives the warning prompt until the first terminal stops driving.
  • the first terminal may determine the power value of the signal sent by the first terminal according to the distance between the first terminal and the second terminal, the relative speed information of the first terminal and the first terminal, and the braking distance information.
  • the first terminal may be configured according to a distance between the first terminal and the second terminal, and a maximum distance between the first terminal and the second terminal, a relative speed of the first terminal and the second terminal, and a preset first. Determining an impact factor by a maximum relative speed of the terminal and the second terminal, and a braking distance of the first terminal and a preset maximum braking distance of the first terminal; and determining a maximum power value of the signal sent by the first terminal according to the influence factor Determining a theoretical power value of the signal transmitted by the first terminal; selecting a larger value from the theoretical power value and a minimum power value of the preset first terminal transmission signal, the power value of the first terminal transmitting signal to satisfy the driving The need for vehicle and car communication in the process.
  • the power value of the signal transmitted by the first terminal MAX[Pmin,(v/Vmax)*(d/Dmax)*(s/Smax)*Pmax], where Pmin is the minimum value of the preset first terminal transmission signal.
  • Pmin is the minimum value of the preset first terminal transmission signal.
  • v is the relative speed of the first terminal and the second terminal
  • Vmax is the preset maximum relative speed of the first terminal and the second terminal
  • d is the distance between the first terminal and the second terminal
  • Dmax is the preset
  • s is the braking distance of the first terminal
  • Smax is the preset maximum braking distance of the first terminal
  • Pmax is the maximum power value of the preset first terminal transmitting signal.
  • the first terminal may also adjust the power value of the transmitted signal in a manner of curve simulation, or adjust the power value of the transmitted signal by other methods, which is not limited in this embodiment of the present invention.
  • the road surface parameter information may further include road surface information, for example, the road surface is dry cement road, dry asphalt road, wet asphalt road, wet cement road, etc., in the embodiment of the present invention, This is not subject to any restrictions.
  • the braking distance s may include a distance s1 traveled by the first terminal when the user receives the alarm prompt to take a protective action; and a distance s2 traveled by the first terminal when the brake is applied during the protection action; During the protection action, the distance s3 traveled by the first terminal during the continuous action brake time.
  • the braking distance s needs to be determined based on the first speed information, the road surface material information, and the reaction time.
  • the relationship between the first speed information, the reaction time and the braking distance can be obtained by querying, and the braking distance of the corresponding first speed information and the reaction time can be obtained. See Table 1 and Table 2.
  • Table 1 is a relationship table of the correspondence relationship between the first speed, the user reaction time, and the travel distance, and a relationship table between the first speed and the correspondence between the time and the distance of the applied brake.
  • Table 2 is the relationship between the material information of the road surface, the adhesion coefficient corresponding to the road material, and the correspondence between the first speed and the braking distance.
  • the response time of the user is 0.6 s
  • the time of the brake action is 0.5 s
  • the time of the continuous action brake is 0.7 s
  • S2 13.89m
  • the first terminal needs to obtain the braking distance according to the road surface parameter information by using a table lookup method, and the braking distance may also be obtained by other methods, which is not limited in the present invention.
  • the second terminal transmits the second location information and the second speed information in real time
  • the first terminal uses the second location information, the second speed information, and the first speed information of the first terminal and the first terminal.
  • a position information determines the power value of the transmitted signal in real time, that is, dynamically adjusts the power value of the transmitted signal to meet the requirements of safe driving.
  • the first terminal adjusts the power value of the signal transmitted by the first terminal according to the received road surface parameter information, accurately determines the power value of the signal transmitted by the first terminal, can reduce signal interference during low-speed aggregation, or avoids high-speed driving. , The coverage of the signal transmitted by the first terminal cannot meet the demand for safe driving.
  • the size of the sequence numbers of the above processes does not mean the order of execution, and the order of execution of each process should be determined by its function and internal logic, and should not be directed to the embodiments of the present invention.
  • the implementation process constitutes any limitation.
  • FIG. 3 is a schematic flowchart of a communication method according to another embodiment of the present invention.
  • the method 300 shown in FIG. 3 includes:
  • the first terminal receives the second location information and the second speed information sent by the second terminal.
  • the first terminal acquires its own first location information and first speed information.
  • the first terminal determines, according to the second location information, the first location information, the second speed information, and the first speed information, a power value.
  • the first terminal sends a signal to the second terminal according to the power value.
  • the second terminal performs alarm processing according to the signal.
  • the first terminal determines the power value according to the second location information, the first location information, the second speed information, and the first speed information, and specifically includes:
  • the first terminal determines the distance between the first terminal and the first terminal according to the second location information and the first location information; the first terminal determines the relative speed of the first terminal and the second terminal according to the second speed information and the first speed information The first terminal determines the power value according to the distance and relative speed information of the first terminal and the second terminal.
  • the signal includes first location information and first speed information for the first terminal.
  • the second terminal performs alarm processing according to the first location information and the first speed information, and the second speed information and the second location information of the second terminal.
  • the second terminal performs an alarm prompt.
  • the second terminal does not perform an alarm prompt.
  • the second terminal transmits the second location information and the second speed information in real time
  • the first terminal uses the second location information, the second speed information, and the first speed information of the first terminal and the first terminal.
  • a position information, real-time determination of the power value of the transmitted signal that is, dynamic The power value of the transmitted signal is adjusted to meet the requirements of safe driving.
  • steps 310, 320, 330, and 340 included in the method 300 of the embodiment of the present invention may be specifically implemented to implement the steps 101, 102, 103, and 104 included in the method 100 shown in FIG. , will not repeat them here.
  • the method 300 further includes:
  • the first terminal receives road surface parameter information sent by the roadside unit device;
  • the first terminal adjusts the power value according to the road parameter information.
  • the first terminal sends a signal to the second terminal according to the adjusted power value.
  • the second V2V terminal performs alarm processing according to the signal.
  • the first terminal adjusts the power value according to the road surface parameter information, and specifically includes: the first terminal adjusts the power value according to the first speed information, the first position information, the second speed information, the second position information, and the road surface parameter information.
  • the second terminal transmits the second location information and the second speed information in real time
  • the first terminal uses the second location information, the second speed information, and the first speed information of the first terminal and the first terminal.
  • a position information determines the power value of the transmitted signal in real time, that is, dynamically adjusts the power value of the transmitted signal to meet the requirements of safe driving.
  • the first terminal adjusts the power value of the signal transmitted by the first terminal according to the received road surface parameter information, accurately determines the power value of the signal transmitted by the first terminal, can reduce signal interference during low-speed aggregation, or avoids high-speed driving.
  • the coverage of the signal transmitted by the first terminal cannot meet the demand for safe driving.
  • steps 360, 370, 380, 340, and 350 included in the method 300 of the embodiment of the present invention may be specifically implemented to implement the steps 105 and 106 included in the method 100 shown in FIG. 2, for simplicity of description, This will not be repeated here.
  • the first terminal when the first terminal just starts or does not receive the parameter information sent by the second terminal or other device, the first terminal sends a signal according to the preset initial power value.
  • the first terminal acquires the first speed information, that is, its own speed information, and determines the power value of the transmitted signal according to the obtained first speed information.
  • the first terminal can be based on
  • the first speed information is used to determine the speed scene.
  • the speed scene may include: a low speed scene, a medium speed scene, and a high speed scene.
  • the power value of the speed scene corresponding to the first speed information is obtained by querying a relationship table between the stored speed scene and the power value. . Wherein, the power value may be greater than a preset initial power value.
  • the signal is sent to the second terminal according to the power value, where the signal includes: first location information of the first terminal, first speed information, and other parameter information;
  • the alarm processing is performed according to the first location information of the first terminal, the first speed information, and other parameter information.
  • the first terminal can dynamically adjust the power value of the transmitted signal by its own speed to meet the requirement of safe driving.
  • the size of the sequence numbers of the above processes does not mean the order of execution, and the order of execution of each process should be determined by its function and internal logic, and should not be directed to the embodiments of the present invention.
  • the implementation process constitutes any limitation.
  • FIG. 5 is a schematic structural diagram of a terminal 500 according to an embodiment of the present invention.
  • the terminal 500 of FIG. 5 includes: a receiving module 510, a determining module 520, and a sending module 530, where
  • a determining module 520 configured to determine a distance from the second terminal
  • the receiving module 510 is configured to receive second speed information sent by the second terminal, where the second speed information is current speed information of the second terminal;
  • the determining module 520 is further configured to determine a power value according to the distance, the second speed information, and the first speed information of the device, where the first speed information is current speed information of the first terminal;
  • the sending module 530 is configured to send a signal to the second terminal according to the power value.
  • the receiving module 510 needs to receive the second speed information and the second location information that are sent by the second terminal, that is, the receiving module 510 receives the current speed information and the current location information of the second terminal.
  • the determining module 520 is based on the current location information of the second terminal. And the current location location information of the terminal, determining the distance between the terminal and the second terminal, and determining, according to the distance between the terminal and the second terminal, the current speed information of the second terminal and the current location information of the terminal, The power value of the signal; the sending module 530 sends a signal to the second terminal according to the determined power value, so that the second terminal performs alarm processing according to the signal.
  • the determining module 520 is specifically configured to:
  • the terminal in the embodiment of the present invention receives the current location information and the speed information by using the terminal in real time, and the terminal is based on the current location information and speed information of the other terminal, and the current location information and speed information of the terminal, in real time. Determining the power value of the transmitted signal enables dynamic adjustment of the power value of the transmitted signal to meet the needs of safe driving.
  • the terminal 500 further includes an adjustment module 540.
  • the receiving module 510 is further configured to: receive the road surface parameter information sent by the roadside unit device, where the roadside unit device is a communication device disposed on the road side;
  • the adjusting module 540 is configured to adjust the power value according to the road surface parameter information
  • the sending module 530 is further configured to send the signal to the second terminal according to the adjusted power value.
  • the terminal receives the second location information and the second speed information by receiving the second terminal in real time, and the first terminal according to the second location information, the second speed information, and the first speed information of the first terminal
  • the first position information determines the power value of the transmitted signal in real time, that is, dynamically adjusts the power value of the transmitted signal to meet the requirement of safe driving.
  • the terminal adjusts the power value of the signal transmitted by the terminal according to the received road surface parameter information, accurately determines the power value of the signal transmitted by the first terminal, can reduce the signal interference during low-speed aggregation, or avoids the high-speed driving, The coverage of a terminal transmitting signal cannot meet the demand for safe driving.
  • the terminal 500 further includes an obtaining module 550.
  • the obtaining module 550 is configured to acquire first location information of the first terminal.
  • the receiving module 510 is further configured to receive second location information sent by the second terminal.
  • the determining module 520 is further configured to determine, according to the first location information and the second location information, a distance between the first terminal and the second terminal.
  • the determining module 520 is specifically configured to determine relative speed information of the first terminal and the second terminal according to the second speed and the first speed;
  • the adjustment module 540 is specifically configured to adjust the power value according to the distance, the relative speed information, and the road surface parameter information.
  • the terminal in the embodiment of the present invention receives the current location information and the speed information by using the terminal in real time, and the terminal determines the power value of the transmitted signal in real time according to the relative position and speed information and distance of the terminal and other terminals, thereby realizing dynamics. Adjust the power value of the transmitted signal to meet the needs of safe driving.
  • the terminal when the terminal just starts or does not receive the parameter information sent by the second terminal or other device, the terminal sends a signal according to the preset initial power value.
  • the obtaining module 550 acquires the first speed information, that is, its own speed information; and the determining module 520 determines the power value of the transmitted signal according to the obtained first speed information.
  • the determining module 520 may determine the speed scene according to the first speed information, where the speed scene may include: a low speed scene, a medium speed scene, and a high speed scene; and obtain a first speed information by querying a relationship table between the stored speed scene and the power value correspondence relationship.
  • the power value of the corresponding speed scene wherein, the power value may be greater than a preset initial power value.
  • the sending module 530 sends a signal to the second terminal according to the power value determined by the determining module 520 according to the first speed, where the signal includes: first location information of the first terminal, first speed information, and other parameter information; After receiving the signal, the second terminal performs alarm processing according to other parameter information such as the first location information and the first speed information of the terminal.
  • the terminal can dynamically adjust the power value of the transmitted signal by its own speed to meet the requirement of safe driving.
  • the terminal 500 may correspond to an execution body of the method 100 according to an embodiment of the present invention, and the above and other operations and/or functions of the respective modules in the terminal 500 are respectively In order to implement the corresponding processes of the respective methods in FIG. 1 to FIG. 4, for brevity, details are not described herein again.
  • the embodiment of the invention further provides a terminal 600.
  • the user equipment 600 includes a receiver 610, a processor 620, a transmitter 630, and a bus system 640.
  • the receiver 610, the processor 620, and the transmitter 630 are connected by a bus system 640 for storing instructions for executing instructions stored in the memory 720. among them,
  • the processor 620 is configured to determine a distance from the second terminal.
  • the receiver 610 is configured to receive second speed information sent by the second terminal, where the second speed information is current speed information of the second terminal.
  • the processor 620 is further configured to determine a power value according to the distance, the second speed information, and the first speed information of the terminal, where the first speed information is current speed information of the first terminal;
  • the transmitter 630 is configured to send a signal to the second terminal according to the power value.
  • the terminal in the embodiment of the present invention receives the current location information and the speed information by using the terminal in real time, and the terminal determines the real-time location according to the current location information and speed information of the other terminal, and the current location information and speed information of the terminal.
  • the power value of the transmitted signal enables dynamic adjustment of the power value of the transmitted signal to meet the needs of safe driving.
  • the processor 620 may be a central processing unit (CPU), and the processor 620 may also be other general-purpose processors, digital signal processors (DSPs), and application specific integrated circuits. (ASIC), off-the-shelf programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and more.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the bus system 640 may include a power bus, a control bus, a status signal bus, and the like in addition to the data bus. However, for the sake of clarity, the various buses are labeled as buses in the figure. System 640.
  • the terminal can also include a memory, which can include read only memory and random access memory, and provides instructions and data to the processor 620.
  • a portion of the memory may also include a non-volatile random access memory.
  • the memory can also store information of the device type.
  • each step of the above method may be completed by an integrated logic circuit of hardware in the processor 620 or an instruction in a form of software.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory, and the processor 620 reads the information in the memory and completes the steps of the above method in combination with the hardware thereof. To avoid repetition, it will not be described in detail here.
  • the receiver 610 is further configured to: receive the road surface parameter information sent by the roadside unit device, where the roadside unit device is a communication device disposed on the road side;
  • the processor 620 is further configured to adjust the power value according to the road surface parameter information
  • the transmitter 630 is further configured to send the signal to the second terminal according to the adjusted power value.
  • the terminal receives the second location information and the second speed information by receiving the second terminal in real time, and the first terminal according to the second location information, the second speed information, and the first speed information of the first terminal
  • the first position information determines the power value of the transmitted signal in real time, that is, dynamically adjusts the power value of the transmitted signal to meet the requirement of safe driving.
  • the terminal adjusts the power value of the signal transmitted by the terminal according to the received road surface parameter information, accurately determines the power value of the signal transmitted by the first terminal, can reduce the signal interference during low-speed aggregation, or avoids the high-speed driving, The coverage of a terminal transmitting signal cannot meet the demand for safe driving.
  • the receiver 610 is configured to acquire first location information of the first terminal.
  • the receiver 610 is further configured to receive second location information sent by the second terminal.
  • the processor 620 is further configured to: determine, according to the first location information and the second location information, the first terminal The distance from the second terminal.
  • the processor 620 is specifically configured to: determine, according to the second speed and the first speed, relative speed information of the first terminal and the second terminal; and according to the distance, the relative speed information, and the road surface parameter information. , adjust the power value.
  • the terminal in the embodiment of the present invention receives the current location information and the speed information by using the terminal in real time, and the terminal determines the power value of the transmitted signal in real time according to the relative position and speed information and distance of the terminal and other terminals, thereby realizing dynamics. Adjust the power value of the transmitted signal to meet the needs of safe driving.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, or an electrical, mechanical or other form of connection.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiments of the present invention.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • the technical solution of the present invention contributes in essence or to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium.
  • a number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

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Abstract

本发明涉及一种通讯方法和终端，方法包括：第一终端确定与第二终端的距离；接收第二终端发送的第二速度信息，第二速度信息为第二终端的当前速度信息；根据距离、第二速度信息和第一终端的第一速度信息，确定功率值，其中，第一速度信息为第一终端的当前速度信息；根据功率值向第二终端发送信号。因此，本发明实施例的通讯方法，通过实时接收第二终端发送第二位置信息和第二速度信息，第一终端根据第二位置信息、第二速度信息以及第一终端的第一速度信息和第一位置信息，实时的确定发送信号的功率值，即动态调整了发送信号的功率值，满足安全行驶的需求。

Description

通讯方法和终端 技术领域
本发明涉及通信领域，尤其涉及一种通讯方法和终端。
背景技术
每年大量的交通事故给人类造成了巨大损失，我们期望通过车车(Vehicle-to-Vehicle,V2V)通讯技术能够减少交通事故。目前业界还没有技术成熟并能大规模商用的V2V通讯技术，较为领先的代表技术是专用短程通信(Dedicated Short Range Communications，DSRC)技术。
而现有DSRC技术中用于通讯的可用信道资源有限，且每个信道采用固定的发射功率值和固定的方向发射信号，以使车辆在低速聚集时，造成信号干扰；在车辆高速行驶时，发射信号的覆盖范围不能满足安全距离的需求。
发明内容
本发明实施例提供了一种通讯方法和系统，用以动态调整信道发射信号的功率值，实现了动态调整了发送信号的功率值，满足安全行驶的需求。
第一方面，本发明实施例提供了一种通讯方法，该方法包括：第一终端确定与第二终端的距离；所述第一终端接收所述第二终端发送的第二速度信息，所述第二速度信息为所述第二终端的当前速度信息；所述第一终端根据所述距离、所述第二速度信息和所述第一终端的第一速度信息，确定功率值，其中，所述第一速度信息为所述第一终端的当前速度信息；所述第一终端根据所述功率值向所述第二终端发送信号。
结合第一方面，在第一方面的第一种可能的实现方式中，所述第一终端根据所述距离、所述第二速度信息和所述第一终端的第一速度信息，确定功 率值，包括：所述第一终端接收的路边单元设备发送的路面参数信息，其中，所述路边单元设备为设置在路侧的通信设备；所述第一终端根据所述路面参数信息，调整所述功率值；所述第一终端根据调整后的功率值向所述第二终端发送所述信号。
结合第一方面的第一种可能的实现方式，在第一方面的第二种可能的实现方式中，所述路面参数信息包括刹车距离，所述功率值与所述刹车距离成正比关系。
结合第一方面，在第一方面的第三种可能的实现方式中，所述第一终端确定与第二终端的距离，具体包括：所述第一终端获取所述第一终端的第一位置信息；所述第一终端接收第二终端发送的第二位置信息；所述第一终端根据所述第一位置信息和所述第二位置信息，确定所述第一终端与所述第二终端的距离。
结合第一方面，在第一方面的第四种可能的实现方式中，所述第一终端根据所述距离、第二速度信息和所述第一终端的第一速度信息，确定功率值，具体包括：所述第一终端根据所述第二速度信息和所述第一速度信息，确定所述第一终端与所述第二终端的相对速度信息；所述第一终端根据所述距离和所述相对速度信息，确定所述功率值。
结合第一方面的第一种可能的实现方式，在第一方面的第五种可能的实现方式中，所述第一终端根据接收的路边单元设备发送的路面参数信息，调整功率值具体包括：所述第一终端根据所述第二速度和所述第一速度，确定所述第一终端与所述第二终端的相对速度信息；所述第一终端根据所述距离、所述相对速度信息和所述路面参数信息，调整所述功率值。
结合第一方面或第一方面的第二种可能的实现方式，在第一方面的第六种可能的实现方式中，所述距离与所述功率值成正比关系。
结合第一方面的第四种可能的实现方式或第一方面的第五种可能的实现方式中，所述相对速度与所述功率值成正比关系。
第二方面，所述终端包括：确定模块，用于确定与第二终端的距离；接收模块，用于接收所述第二终端发送的第二速度信息，所述第二速度信息为所述第二终端的当前速度信息；所述确定模块，还用于根据所述距离、所述第二速度信息和所述终端的第一速度信息，确定功率值，其中，所述第一速度信息为所述第一终端的当前速度信息；发送模块，用于根据所述功率值向所述第二终端发送信号。
结合第二方面，在第一方面的第一种可能实现的方式中，所述设备还包括调整模块，所述接收模块还用于，接收的路边单元设备发送的路面参数信息，其中，所述路边单元设备为设置在路侧的通信设备；所述调整模块用于，根据所述路面参数信息，调整所述功率值；所述发送模块还用于，根据调整后的功率值向所述第二终端发送所述信号。
结合第二方面的第一种可能实现的方式，在第二方面的第二种可能实现的方式中，所述终端还包括获取模块，所述获取模块，用于获取所述第一终端的第一位置信息；所述接收模块还用于，接收第二终端发送的第二位置信息；所述确定模块还用于，根据所述第一位置信息和所述第二位置信息，确定所述第一终端与所述第二终端的距离。
结合第二方面的第三种可能实现的方式中，所述确定模块具体用于，根据所述第二速度信息和所述第一速度信息，确定所述第一终端与所述第二终端的相对速度信息；根据所述距离和所述相对速度信息，确定所述功率值。
结合第二方面的第一种可能实现的方式，在第二方面的第四种可能实现的方式中，所述确定模块具体用于，根据所述第二速度和所述第一速度，确定所述第一终端与所述第二终端的相对速度信息；所述调整模块具体用于，根据所述距离、所述相对速度信息和所述路面参数信息，调整所述功率值。
因此，本发明实施例的通讯方法，通过实时接收第二终端发送第二位置信息和第二速度信息，第一终端根据第二位置信息、第二速度信息以及第一终端的第一速度信息和第一位置信息，实时的确定发送信号的功率值，即动 态调整了发送信号的功率值，满足安全行驶的需求。
附图说明
为了更清楚地说明本发明实施例的技术方案，下面将对本发明实施例中所需要使用的附图作简单地介绍，显而易见地，下面所描述的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是根据本发明实施例的通讯方法的示意性流程图；
图2是根据本发明另一实施例的通讯方法的示意性流程图；
图3是根据本发明实施例的通讯方法的示意性交互图；
图4是根据本发明另一实施例的终端的示意性结构示意图；
图5是根据本发明实施例的终端的示意性结构示意图；
图6是根据本发明另一实施例的终端的示意性结构示意图；
图7是根据本发明再一实施例的终端的示意性结构示意图；
图8是根据本发明又一实施例的终端的示意性结构示意图。
具体实施方式
本发明实施例提供的一种通讯方法和终端具体用于车与车之间的通讯。在本发明实施例中，车车通讯(Vehicle-to-Vehicle，简称为“V2V”)。第一终端与第二终端可以具体为设置有车车通讯功能的车载设备或者是配备有车车通讯功能的车载设备的机动车，包括：车载诊断(英文：On-Board Diagnostic，简称：OBD)装置，用于采集车辆自身的数据，例如：车速，方向角等；全球导航卫星系统(英文：Global Navigation Satellite System，简称：GNSS)装置，用于采集导航卫星信号，计算车辆位置信息。在实施例中，还包括：路边单元(英文：Road Side Unit，简称：RSU)设备，路边单元设备可以具体为设置在路侧的通信设备，用于采集环境参数信息，例如：路面参数、车密 度等参数信息。在本发明实施例中，第一终端实时获取第二终端和其他设备发送的参数信息，根据参数信息实时调整第一终端发送信号的功率值，以满足安全行驶的需求。
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
图1是根据本发明实施例的通讯方法的示意性流程图。如图1所示的方法100可以由第一V2V终端执行，该方法包括：
101，第一端确定与第二终端的距离；
102，第一终端接收第二终端发送的第二速度信息，其中，第二速度信息为第二终端当前的速度信息；
103，第一终端根据距离、第二速度信息和第一终端的第一速度信息，确定功率值，其中，第一速度信息为第一终端的当前速度信息；
104，第一终端根据功率值向第二终端发送信号。
具体地，在行驶过程中，第一终端接收第二终端发送的信息，该信息包括第二位置信息，第二速度信息，其中，第二位置信息可以为第二终端当前的位置信息，第二速度信息可以为第二终端当前的速度信息。第一终端根据接收的信息和获取的第一终端的第一速度信息和位置信息，确定功率值；并根据该功率值向第二终端发送信号，该信号包括第一终端的第一速度信息和第一位置信息。
应理解，在本发明实施例中，第二终端发送的信息还可以包括第二终端行驶过程中的方向角，或者第二终端的其他信息，在本发明中不作任何限制。
可选地，在本发明实施例中，第一终端确定与第二终端的距离，可以具体包括：获取第一终端的第一位置信息；接收第二终端设备发送的第二位置信息；根据第一位置信息和第二位置信息，确定第一终端与第二终端的距离。
在102中，第一速度信息为第一终端的当前时刻的速度信息，第一终端获取存储的第一速度信息，即自身的速度信息。在本发明实施例中，需要车载诊断OBD装置实时检测第一终端的第一速度，并将检测到的第一速度信息发送给第一终端，第一终端接收车载诊断OBD装置发送的第一速度信息，并存储第一速度信息，当第一终端发送信号的功率值需要调整时，第一终端获取存储的当前时刻的速度信息。
在103中，第一终端根据第一终端与第二终端的距离、第二速度信息和第一速度信息，确定第一终端发送信号的功率值。
在104中，信号包括第一终端的第一位置信息和第一速度信息，第一终端按照功率值发送信号，以用于第二终端接收到该信号后，根据该信号进行告警处理，也就是说，第二终端根据接收的信号进行处理，当达到预设告警条件时，进行告警；未达到告警条件时，不作告警。
可选地，作为本发明另一实施例，根据距离、第二速度信息和第一终端的第一速度信息，确定功率值，包括：根据第二速度和第一速度，确定第一终端与第二终端的相对速度信息；根据距离和相对速度信息，确定功率值。
具体的，在本发明实施例中，第一终端根据第一终端与第二终端的距离，第一终端与第二终端的相对速度信息，确定第一终端发送信号的功率值。
可选地，作为本发明另一实施例，功率值与距离成正比关系。
具体的，第一终端发送信号的功率值，与第一终端和第二终端的距离成正比关系。
可选地，作为本发明另一实施例，功率与相对速度信息成正比关系。
具体的，第一终端发送信号的功率值，与第一终端和第二终端的相对速度信息成正比关系。
在本发明实施例中，第一终端可以根据第一终端与第二终端的距离和预设第一终端与第二终端的最大距离，以及第一终端与第二终端的相对速度和预设第一终端与第二终端的最大相对速度，确定影响因子；根据该影响因子 与预设的第一终端发送信号的最大功率值，确定第一终端发送信号的理论功率值；从该理论功率值与预设的第一终端发送信号的最小功率值中选择较大的值最为第一终端发送信号的功率值，以满足在行驶过程中车车通信的需求。
例如：第一终端发送信号的功率值＝MAX[Pmin，(v/Vmax)*(d/Dmax)*Pmax]，其中，Pmin为预设的第一终端发送信号的最小发送功率值，v为第一终端与第二终端的相对速度，Vmax为预设的第一终端与第二终端的最大相对速度，d为第一终端与第二终端的距离，Dmax为预设的第一V2V终端与第二V2V终端的最大距离，Pmax为预设第一终端发送信号的最大功率值。在本发明实施例中，第一终端与第二终端的距离、以及第一终端与第二终端的相对速度为影响第一终端发送信号的功率值的主要因素，当第一终端获取到第一终端与第二终端的相对速度、第一终端与第二终端的距离时，可以通过(v/Vmax)*(d/Dmax)*Pmax，确定第一终端发送信号的理论功率值；当第一终端未获取到第一终端与第二终端的相对速度和/或第一终端与第二终端的距离时，v/Vmax和/或d/Dmax影响因子为0。
在本发明实施例中，当第一终端刚启动或者未接收第二终端或其他设备发送的参数信息时，第一终端根据预设的初始功率值发送信号。在预设功率控制的时间周期点，第一终端获取第一速度信息，即自身的速度信息，并根据获取到的第一速度信息确定发射信号的功率值。例如，第一终端可以根据第一速度信息判断速度场景，速度场景可以包括：低速场景、中速场景和高速场景；通过查询存储的速度场景与功率值对应关系的关系表，得到第一速度信息对应的速度场景的功率值。其中，功率值可以大于预设初始功率值。
当根据第一速度确定第一终端发送信号的功率值时，根据功率值向第二终端发送信号，其中，信号包括：第一终端的第一位置信息、第一速度信息等其他参数信息；以用于第二终端接收信号后，根据第一终端的第一位置信息、第一速度信息等其他参数信息进行告警处理。
因此，在本发明实施例中，第一终端可以通过自身的速度动态调整发 送信号的功率值，以满足安全行驶的需求。
应理解，在本发明实施例中，第一终端也可以通过曲线模拟的方式调整发送信号的功率值，或者通过其他方式调整发送信号的功率值本发明实施例对此并不做限定。
因此，本发明实施例的通讯方法，通过实时接收第二终端发送第二位置信息和第二速度信息，第一终端根据第二位置信息、第二速度信息以及第一终端的第一速度信息和第一位置信息，实时的确定发送信号的功率值，即动态调整了发送信号的功率值，满足安全行驶的需求。
应理解，在本发明实施例中，第一终端还可以接收路面单元设备发送的路面参数信息，或者其他设备发送的参数信息，在本发明中对此不作限制。
可选地，作为本发明另一个实施例，如图2所示，根据距离、第二速度信息和第一终端的第一速度信息，确定功率值，包括：
105，第一终端接收路边单元设备发送的路面参数信息，其中，路边单元设备为设置在路侧的通信设备；
106，第一终端根据路面参数信息，调整功率值；
107，第一终端根据调整后的功率值向第二终端发送信号。
具体的，路面单元设备可以为设置在路侧的具有通信功能的设备。第一终端接收路边单元设备路面参数信息，根据第一终端与第二终端的距离、第一速度信息、第二速度信息和路面参数信息，确定第一终端发送信号的功率值。
应理解，第一终端还可以接收路面单元设备发送的车密度信息，或者其他环境参数信息，在本发明中对此不作限定。
可选地，在本发明实施例中，根据接收的路边单元设备发送的路面参数信息，调整功率值具体包括：根据第二速度和第一速度，确定第一终端与第二终端的相对速度信息；根据距离、相对速度信息和路面参数信息，调整功率值。
可选地，作为本发明另一实施例，路面参数信息可以包括刹车距离，功率值与刹车距离成正比关系。
具体的，刹车距离为用户接收到告警提示至第一终端停止行驶时，第一终端行驶的距离。第一终端可以根据第一终端和第二终端的距离、第一终端和第一终端的相对速度信息以及刹车距离信息，确定第一终端发送信号的功率值。
在本发明实施例中，第一终端可以根据第一终端与第二终端的距离和预设第一终端与第二终端的最大距离，第一终端与第二终端的相对速度和预设第一终端与第二终端的最大相对速度，以及第一终端的刹车距离和预设的第一终端的最大刹车距离，确定影响因子；根据该影响因子与预设的第一终端发送信号的最大功率值，确定第一终端发送信号的理论功率值；从该理论功率值与预设的第一终端发送信号的最小功率值中选择较大的值最为第一终端发送信号的功率值，以满足在行驶过程中车车通信的需求。
例如：第一终端发送信号的功率值＝MAX[Pmin，(v/Vmax)*(d/Dmax)*(s/Smax)*Pmax]，其中，Pmin为预设的第一终端发送信号的最小发送功率值，v为第一终端与第二终端的相对速度，Vmax为预设的第一终端与第二终端的最大相对速度，d为第一终端与第二终端的距离，Dmax为预设的第一V2V终端与第二V2V终端的最大距离，s为第一终端的刹车距离，Smax为预设的第一终端的最大刹车距离，Pmax为预设第一终端发送信号的最大功率值。在本发明实施例中，第一终端与第二终端的距离、第一终端与第二终端的相对速度以及第一终端的刹车距离为影响第一终端发送信号的功率值的主要因素，可以通过(v/Vmax)*(d/Dmax)*(s/Smax)*Pmax，确定第一终端发送信号的理论功率值；根据第一终端发送信号的功率值＝MAX[Pmin，(v/Vmax)*(d/Dmax)*(s/Smax)*Pmax]，确定第一终端发送信号的功率值，例如：当Pmin＝20mw、Vmax＝300Km/h、Pmax＝300mw、Dmax＝150m、Smax＝200m、v＝100Km/h、d＝100m、s＝100m时，第一V2V终端发送信号的功率值＝MAX[20mw，(100/300) *(100/150)*(100/200)*300mw]≈33mw，此时，第一V2V终端依33mw的功率值发送信号。
应理解，上述以Pmin＝20mw、Vmax＝300Km/h、Pmax＝300mw、Dmax＝150m、Smax＝200m、v＝100Km/h、d＝100m、s＝100m具体数字为例，对本发明实施例的技术方案进行详细的描述，并不对本发明实施例的范围构成任何限定
应理解，在本发明实施例中，第一终端还可以通过曲线模拟的方式调整发送信号的功率值，或者通过其他方式调整发送信号的功率值，本发明实施例对此并不做限定。
还应理解，在本发明实施例中，路面参数信息还可以包括路面信息，例如：路面为干水泥路、干柏油路、湿柏油路、湿水泥路等信息，在本发明实施例中，对此不作任何限定。
在本发明实施例中，刹车距离s可以包括用户接收到告警提示至采取保护动作时，第一终端行驶的距离s1；采取保护动作过程中，作用制动器时，第一终端行驶的距离s2；以及采取保护动作过程中，持续作用制动器时间内，第一终端行驶的距离s3。刹车距离s需要根据第一速度信息、路面材质信息和反应时间确定。其中，反应时间包括用户接收到告警提示至采取保护动作的时间t1，采取保护动作时作用制动器的时间t2，以及持续作用制动器的时间t，也就是说，刹车距离s＝s1+s2+s3。可以通过查询存储了第一速度信息、反应时间与刹车距离对应关系的关系表，得到相应第一速度信息和反应时间的刹车距离，可参见表一、表二。表一为第一速度、用户反应时间与行驶距离的对应关系的关系表，以及第一速度、作用制动器的时间与距离的对应关系的关系表。表二为路面的材质信息，路面材质对应的附着系数、第一速度与制动距离对应关系的关系表。例如，当第一V2V终端的第一速度为100km/h，用户的反应时间为0.6s，制动器作用的时间为0.5s，持续作用制动器的时间为0.7s，查询表一得到s1＝16.67m，s2＝13.89m，查询表二得到s3＝56.24m，那么刹车距离s＝16.67m+13.89m+56.24m＝86.80m。
表一
Figure PCTCN2016085665-appb-000001
表二
Figure PCTCN2016085665-appb-000002
应理解，在本发明实施例中，第一终端需要根据路面参数信息，通过查表的方法得到刹车距离，也可以通过其他方式得到刹车距离，在本发明中对此不做限制。
采用本发明实施例的通讯方法，通过实时接收第二终端发送第二位置信息和第二速度信息，第一终端根据第二位置信息、第二速度信息以及第一终端的第一速度信息和第一位置信息，实时的确定发送信号的功率值，即动态调整了发送信号的功率值，满足安全行驶的需求。同时，第一终端根据接收的路面参数信息调整第一终端发送信号的功率值，精确地确定第一终端发送信号的功率值，可降低低速聚集时，信号的干扰，或者避免了在高速行驶中， 第一终端发送信号的覆盖范围不能满足安全行驶的需求问题。
应理解，在本发明的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本发明实施例的实施过程构成任何限定。
图3是根据本发明另一实施例的通讯方法的示意性流程图，如图3所示的方法300包括：
310，第一终端接收第二终端发送的第二位置信息和第二速度信息；
320，第一终端获取自身的第一位置信息和第一速度信息；
330，第一终端根据第二位置信息、第一位置信息、第二速度信息和第一速度信息，确定功率值；
340，第一终端根据功率值向第二终端发送信号；
350，第二终端根据信号进行报警处理。
具体的，在330中，第一终端根据第二位置信息、第一位置信息、第二速度信息和第一速度信息，确定功率值，具体包括：
第一终端根据第二位置信息和第一位置信息，确定第一终端和第一终端的距离；第一终端根据第二速度信息和第一速度信息，确定第一终端和第二终端的相对速度信息；第一终端根据第一终端与第二终端的距离和相对速度信息，确定功率值。
在340中，信号包括第一终端的第一位置信息和第一速度信息。
在350中，第二终端根据第一位置信息和第一速度信息，以及第二终端的第二速度信息和第二位置信息进行告警处理，当达到预设告警条件时，第二终端进行告警提示；当未达到告警条件时，第二终端不进行告警提示。
采用本发明实施例的通讯方法，通过实时接收第二终端发送第二位置信息和第二速度信息，第一终端根据第二位置信息、第二速度信息以及第一终端的第一速度信息和第一位置信息，实时的确定发送信号的功率值，即动态 调整了发送信号的功率值，满足安全行驶的需求。
需要说明的是，本发明实施例中的方法300包括的步骤310、320、330和340可以具体用以实现图1所示的方法100包括的步骤101、102、103和104，为了描述的简洁，在此不再赘述。
可选地，作为本发明的另一实施例，如图4所示，方法300还包括：
360，第一终端接收路边单元设备发送的路面参数信息；
370，第一终端根据路面参数信息，调整功率值；
380，第一终端根据调整后的功率值向第二终端发送信号；
390，第二V2V终端根据信号进行告警处理。
具体地，第一终端根据路面参数信息，调整功率值，具体包括：第一终端根据第一速度信息、第一位置信息、第二速度信息、第二位置信息和路面参数信息，调整功率值。
采用本发明实施例的通讯方法，通过实时接收第二终端发送第二位置信息和第二速度信息，第一终端根据第二位置信息、第二速度信息以及第一终端的第一速度信息和第一位置信息，实时的确定发送信号的功率值，即动态调整了发送信号的功率值，满足安全行驶的需求。同时，第一终端根据接收的路面参数信息调整第一终端发送信号的功率值，精确地确定第一终端发送信号的功率值，可降低低速聚集时，信号的干扰，或者避免了在高速行驶中，第一终端发送信号的覆盖范围不能满足安全行驶的需求问题。
需要说明的是，本发明实施例中的方法300包括的步骤360、370、380、340和350可以具体用以实现图2所示的方法100包括的步骤105和106，为了描述的简洁，在此不再赘述。
在本发明实施例中，当第一终端刚启动或者未接收第二终端或其他设备发送的参数信息时，第一终端根据预设的初始功率值发送信号。在预设功率控制的时间周期点，第一终端获取第一速度信息，即自身的速度信息，并根据获取到的第一速度信息确定发射信号的功率值。例如，第一终端可以根据 第一速度信息判断速度场景，速度场景可以包括：低速场景、中速场景和高速场景；通过查询存储的速度场景与功率值对应关系的关系表，得到第一速度信息对应的速度场景的功率值。其中，功率值可以大于预设初始功率值。
当根据第一速度确定第一终端发送信号的功率值时，根据功率值向第二终端发送信号，其中，信号包括：第一终端的第一位置信息、第一速度信息等其他参数信息；以用于第二终端接收信号后，根据第一终端的第一位置信息、第一速度信息等其他参数信息进行告警处理。
因此，在本发明实施例中，第一终端可以通过自身的速度动态调整发送信号的功率值，以满足安全行驶的需求。
应理解，在本发明的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本发明实施例的实施过程构成任何限定。
上文中结合图1至图4，详细描述了根据本发明实施例的通讯方法，下面将结合图5至图8，详细描述根据本发明实施例的第一终端。
图5是根据本发明实施例的终端500的示意性结构图。如图5的终端500包括：接收模块510、确定模块520和发送模块530，其中，
确定模块520，用于确定与第二终端的距离；
接收模块510，用于接收第二终端发送的第二速度信息，第二速度信息为第二终端的当前速度信息；
确定模块520，还用于根据距离、第二速度信息和设备的第一速度信息，确定功率值，其中，第一速度信息为第一终端的当前速度信息；
发送模块530，用于根据功率值向第二终端发送信号。
具体的，在本发明实施例中，接收模块510需要接收第二终端发送的第二速度信息和第二位置信息，也就是说，接收模块510接收第二终端的当前速度信息和当前位置信息；确定模块520根据第二终端的当前位置信 息和该终端的当前位置位置信息，确定该终端与第二终端的距离，并根据该终端和第二终端的距离，第二终端的当前速度信息和该终端的当前位置信息，确定该终端发送信号的功率值；发送模块530，根据确定的功率值向第二终端发送信号，以用于第二终端根据信号进行告警处理。
可选地，在本发明实施例中，确定模块520具体用于，
根据第二速度信息和所述第一速度信息，确定第一终端与所述第二终端的相对速度信息；根据距离和所述相对速度信息，确定所述功率值。
因此，本发明实施例的终端，通过该终端实时接收其他终端发送当前位置信息和速度信息，该终端根据其他终端的当前位置信息和速度信息，以及该终端的当前位置信息和速度信息，实时的确定发送信号的功率值，实现了动态调整发送信号的功率值，以满足安全行驶的需求。
可选地，作为本发明另一实施例，如图6所示，该终端500还包括调整模块540，
接收模块510还用于，接收的路边单元设备发送的路面参数信息，其中，路边单元设备为设置在路侧的通信设备；
调整模块540，用于根据路面参数信息，调整所述功率值；
发送模块530还用于，根据调整后的功率值向第二终端发送所述信号。
采用本发明实施例的终端，该终端通过实时接收第二终端发送第二位置信息和第二速度信息，第一终端根据第二位置信息、第二速度信息以及第一终端的第一速度信息和第一位置信息，实时的确定发送信号的功率值，即动态调整了发送信号的功率值，满足安全行驶的需求。同时，该终端根据接收的路面参数信息调整该终端发送信号的功率值，精确地确定第一终端发送信号的功率值，可降低低速聚集时，信号的干扰，或者避免了在高速行驶中，第一终端发送信号的覆盖范围不能满足安全行驶的需求问题。
可选地，作为本发明另一实施例，如图7所示，该终端500还包括获取模块550，
获取模块550，用于获取第一终端的第一位置信息；
接收模块510还用于，接收第二终端发送的第二位置信息；
确定模块520还用于，根据第一位置信息和第二位置信息，确定第一终端与第二终端的距离。
可选地，在本发明实施例中，确定模块520具体用于，根据第二速度和第一速度，确定第一终端与第二终端的相对速度信息；
调整模块540具体用于，根据距离、相对速度信息和路面参数信息，调整功率值。
本发明实施例的终端，通过该终端实时接收其他终端发送当前位置信息和速度信息，该终端根据该终端与其他终端的相对位置速度信息和距离，实时的确定发送信号的功率值，实现了动态调整发送信号的功率值，以满足安全行驶的需求。
在本发明实施例中，该终端刚启动或者未接收第二终端或其他设备发送的参数信息时，该终端根据预设的初始功率值发送信号。在预设功率控制的时间周期点，获取模块550获取第一速度信息，即自身的速度信息；确定模块520根据获取到的第一速度信息，确定发射信号的功率值。例如，确定模块520可以根据第一速度信息判断速度场景，速度场景可以包括：低速场景、中速场景和高速场景；通过查询存储的速度场景与功率值对应关系的关系表，得到第一速度信息对应的速度场景的功率值。其中，功率值可以大于预设初始功率值。
发送模块530根据确定模块520根据第一速度确定的功率值，向第二终端发送信号，其中，信号包括：第一终端的第一位置信息、第一速度信息等其他参数信息；以用于第二终端接收信号后，根据该终端的第一位置信息、第一速度信息等其他参数信息进行告警处理。
因此，在本发明实施例中，该终端可以通过自身的速度动态调整发送信号的功率值，以满足安全行驶的需求。
应理解，在本发明实施例中，根据本发明实施例的终端500可对应于根据本发明实施例的方法100的执行主体，并且终端500中的各个模块的上述和其它操作和/或功能分别为了实现图1至图4中的各个方法的相应流程，为了简洁，在此不再赘述。
本发明实施例还提供一种终端600。如图8所示，该用户设备600包括接收器610、处理器620、发射器630和总线系统640。其中，接收器610、处理器620、发射器630通过总线系统640相连，该存储器720用于存储指令，该处理器710用于执行该存储器720存储的指令。其中，
处理器620，用于确定与第二终端的距离；
接收器610，用于接收第二终端发送的第二速度信息，第二速度信息为第二终端的当前速度信息；
处理器620还用于，根据距离、第二速度信息和终端的第一速度信息，确定功率值，其中，第一速度信息为第一终端的当前速度信息；
发射器630，用于根据功率值向第二终端发送信号。
采用本发明实施例的终端，通过该终端实时接收其他终端发送当前位置信息和速度信息，该终端根据其他终端的当前位置信息和速度信息，以及该终端的当前位置信息和速度信息，实时的确定发送信号的功率值，实现了动态调整发送信号的功率值，以满足安全行驶的需求。
应理解，在本发明实施例中，该处理器620可以是中央处理单元(Central Processing Unit，CPU)，该处理器620还可以是其他通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)、现成可编程门阵列(FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
该总线系统640除包括数据总线之外，还可以包括电源总线、控制总线和状态信号总线等。但是为了清楚说明起见，在图中将各种总线都标为总线 系统640。
除此外，该终端还可以包括存储器，该存储器可以包括只读存储器和随机存取存储器，并向处理器620提供指令和数据。存储器的一部分还可以包括非易失性随机存取存储器。例如，存储器还可以存储设备类型的信息。
在实现过程中，上述方法的各步骤可以通过处理器620中的硬件的集成逻辑电路或者软件形式的指令完成。结合本发明实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器，处理器620读取存储器中的信息，结合其硬件完成上述方法的步骤。为避免重复，这里不再详细描述。
可选地，作为本发明另一实施例，接收器610还用于，接收的路边单元设备发送的路面参数信息，其中，路边单元设备为设置在路侧的通信设备；
处理器620还用于根据路面参数信息，调整所述功率值；
发射器630还用于，根据调整后的功率值向第二终端发送所述信号。
采用本发明实施例的终端，该终端通过实时接收第二终端发送第二位置信息和第二速度信息，第一终端根据第二位置信息、第二速度信息以及第一终端的第一速度信息和第一位置信息，实时的确定发送信号的功率值，即动态调整了发送信号的功率值，满足安全行驶的需求。同时，该终端根据接收的路面参数信息调整该终端发送信号的功率值，精确地确定第一终端发送信号的功率值，可降低低速聚集时，信号的干扰，或者避免了在高速行驶中，第一终端发送信号的覆盖范围不能满足安全行驶的需求问题。
可选地，作为本发明另一实施例，接收器610，用于获取第一终端的第一位置信息；
接收器610还用于，接收第二终端发送的第二位置信息；
处理器620还用于，根据第一位置信息和第二位置信息，确定第一终端 与第二终端的距离。
可选地，在本发明实施例中，处理器620具体用于，根据第二速度和第一速度，确定第一终端与第二终端的相对速度信息；根据距离、相对速度信息和路面参数信息，调整功率值。
本发明实施例的终端，通过该终端实时接收其他终端发送当前位置信息和速度信息，该终端根据该终端与其他终端的相对位置速度信息和距离，实时的确定发送信号的功率值，实现了动态调整发送信号的功率值，以满足安全行驶的需求。
所属领域的技术人员可以清楚地了解到，为了描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另外，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口、装置或单元的间接耦合或通信连接，也可以是电的，机械的或其它的形式连接。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本发明实施例方案的目的。
另外，在本发明各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以是两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分，或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本发明各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到各种等效的修改或替换，这些修改或替换都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以权利要求的保护范围为准。

Claims (13)

  1. 一种通讯方法，其特征在于，所述方法包括：
    第一终端确定与第二终端的距离；
    所述第一终端接收所述第二终端发送的第二速度信息，所述第二速度信息为所述第二终端的当前速度信息；
    所述第一终端根据所述距离、所述第二速度信息和所述第一终端的第一速度信息，确定功率值，其中，所述第一速度信息为所述第一终端的当前速度信息；
    所述第一终端根据所述功率值向所述第二终端发送信号。
  2. 根据权利要求1所述的方法，其特征在于，所述第一终端根据所述距离、所述第二速度信息和所述第一终端的第一速度信息，确定功率值，包括：
    所述第一终端接收的路边单元设备发送的路面参数信息，其中，所述路边单元设备为设置在路侧的通信设备；
    所述第一终端根据所述路面参数信息，调整所述功率值；
    所述第一终端根据调整后的功率值向所述第二终端发送所述信号。
  3. 根据权利要求2所述的方法，其特征在于，所述路面参数信息包括刹车距离，所述功率值与所述刹车距离成正比关系。
  4. 根据权利要求1所述的方法，其特征在于，所述第一终端确定与第二终端的距离，具体包括：
    所述第一终端获取所述第一终端的第一位置信息；
    所述第一终端接收第二终端发送的第二位置信息；
    所述第一终端根据所述第一位置信息和所述第二位置信息，确定所述第一终端与所述第二终端的距离。
  5. 根据权利要求1所述的方法，其特征在于，所述第一终端根据所述距离、第二速度信息和所述第一终端的第一速度信息，确定功率值，具体包括：
    所述第一终端根据所述第二速度信息和所述第一速度信息，确定所述第 一终端与所述第二终端的相对速度信息；
    所述第一终端根据所述距离和所述相对速度信息，确定所述功率值。
  6. 根据权利要求2所述的方法，其特征在于，所述第一终端根据接收的路边单元设备发送的路面参数信息，调整功率值具体包括：
    所述第一终端根据所述第二速度和所述第一速度，确定所述第一终端与所述第二终端的相对速度信息；
    所述第一终端根据所述距离、所述相对速度信息和所述路面参数信息，调整所述功率值。
  7. 根据权利要求1或3至6任一权利要求所述的方法，其特征在于，所述距离与所述功率值成正比关系。
  8. 根据权利要求5或6任一权利要求所述的方法，其特征在于，所述相对速度与所述功率值成正比关系。
  9. 一种终端，其特征在于，所述终端包括：
    确定模块，用于确定与第二终端的距离；
    接收模块，用于接收所述第二终端发送的第二速度信息，所述第二速度信息为所述第二终端的当前速度信息；
    所述确定模块，还用于根据所述距离、所述第二速度信息和所述终端的第一速度信息，确定功率值，其中，所述第一速度信息为所述第一终端的当前速度信息；
    发送模块，用于根据所述功率值向所述第二终端发送信号。
  10. 根据权利要求9所述的终端，其特征在于，所述设备还包括调整模块，
    所述接收模块还用于，接收的路边单元设备发送的路面参数信息，其中，所述路边单元设备为设置在路侧的通信设备；
    所述调整模块用于，根据所述路面参数信息，调整所述功率值；
    所述发送模块还用于，根据调整后的功率值向所述第二终端发送所述信 号。
  11. 根据权利要求9所述的终端，其特征在于，所述终端还包括获取模块，
    所述获取模块，用于获取所述第一终端的第一位置信息；
    所述接收模块还用于，接收第二终端发送的第二位置信息；
    所述确定模块还用于，根据所述第一位置信息和所述第二位置信息，确定所述第一终端与所述第二终端的距离。
  12. 根据权利要求9所述的终端，其特征在于，所述确定模块具体用于，
    根据所述第二速度信息和所述第一速度信息，确定所述第一终端与所述第二终端的相对速度信息；
    根据所述距离和所述相对速度信息，确定所述功率值。
  13. 根据权利要求10所述的终端，其特征在于，
    所述确定模块具体用于，根据所述第二速度和所述第一速度，确定所述第一终端与所述第二终端的相对速度信息；
    所述调整模块具体用于，根据所述距离、所述相对速度信息和所述路面参数信息，调整所述功率值。
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