CN112232741B - Intelligent logistics management method for acquiring cargo state information in real time - Google Patents
Intelligent logistics management method for acquiring cargo state information in real time Download PDFInfo
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- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
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Abstract
The invention relates to an intelligent logistics management method for acquiring cargo state information in real time, which is characterized in that the real-time communication between a logistics company management center and a logistics company managed by the logistics company management center is utilized to determine the logistics company information corresponding to the cargo in a cargo state information inquiry request and a target vehicle for transporting the cargo, then after the target vehicle is automatically started and switched with an idle communication frequency band negotiated with the logistics company management center, the target vehicle sends the cargo state information corresponding to the cargo state information inquiry request to the logistics company management center in the switched optimal idle communication frequency band, and then the logistics company management center feeds the cargo state information sent by the target vehicle back to a legal requester of the cargo state information inquiry request, so that the actual requirement of the requester for inquiring the cargo state information in real time is met.
Description
Technical Field
The invention relates to the field of logistics, in particular to an intelligent logistics management method for acquiring cargo state information in real time.
Background
After receiving goods to be sent by a sender, the logistics company and branch companies thereof carry out numbering on each goods to form a goods list number, and the goods list number and corresponding goods information are input to a logistics company management center of the logistics company. When the logistics vehicles carry the cargoes and send the cargoes to the addressee addresses, the logistics companies generally require the logistics vehicles to start video monitoring and positioning, so that the remote logistics company management center can monitor the video of the vehicles and the real-time positions of the vehicles in real time.
In order to meet the requirement of searching the state information of the goods transported by the logistics company and the branch companies, the user usually can search the state information of the goods related to the user by the logistics company management center without timing, so as to hope to timely grasp the current position, the transportation state and the video information of the goods in the carriage of the transportation vehicle.
However, existing logistics company management centers tend to update the status of each item at certain update intervals and also do not provide video information about the item within the vehicle of the transportation vehicle. The logistics management method obviously cannot meet the requirement of a user for inquiring and acquiring the cargo state information in real time, the cargo state information is updated with hysteresis, and the cargo state information provided by a logistics company management center is too simple, so that the practical requirement that the user hopes to inquire and grasp the real-time state video of the cargo in the carriage of the transport vehicle in real time is difficult to meet.
In addition, in the existing traditional logistics management method, a logistics vehicle for transporting goods is often communicated with a logistics branch company managed by the logistics branch company, goods state information is obtained by the logistics branch company, and then the obtained goods state information is sent to a logistics company management center by the logistics branch company, so that communication does not exist between the logistics company management center and the logistics vehicle for transporting goods. Obviously, the goods state information needs to be transferred through the logistics branch company, so that the deviation between the goods state information acquired by the logistics company management center and the goods state information at the current moment is caused to a certain extent, and the real-time state information of the goods cannot be acquired by the logistics company management center at the first time.
Moreover, when data is transmitted between the logistics vehicles for transporting goods and the logistics branch companies, the logistics vehicles possibly pass through different geographic positions and various types of roads such as expressways, common roads or mountain roads in the actual transportation process of the logistics vehicles, and the communication environments of the logistics vehicles in different positions are also greatly different, so that the available communication frequency bands around the logistics vehicles are very limited and even are short, the communication process between the logistics vehicles and the logistics branch companies is not smooth, and the data about the goods state information is difficult to be timely and rapidly sent to the logistics branch companies.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an intelligent logistics management method for acquiring cargo state information in real time aiming at the prior art.
The technical scheme adopted for solving the technical problems is as follows: an intelligent logistics management method for acquiring cargo state information in real time is characterized by comprising the following steps of 1-9:
step 1, a logistics company management center registers and stores the information of a cargo list corresponding to cargoes received by each logistics branch company managed by the logistics company management center in advance; the goods list information comprises goods sender information, goods receiver information and logistics branch company information for receiving the goods, the goods sender information comprises a goods sender name, a goods sender contact address and a goods sender contact mobile phone number, the goods receiver information comprises a goods receiver name, a goods receiver contact address and a goods receiver contact mobile phone number, and the goods information comprises a goods name, a goods list number, a goods quality and a goods volume;
step 2, the logistics company management center communicates with each logistics branch company in real time to acquire the goods carrying state information arranged by each logistics branch company; the goods carrying state information comprises information about whether goods are sent by a logistics vehicle, a goods list number of the goods, logistics vehicle information corresponding to the sent goods and the time when the logistics vehicle leaves a logistics branch company; the logistics vehicles arranged and sent by the logistics branch companies are provided with N positioning devices and U frequency spectrum sensing modules, wherein N is more than or equal to 2, and U is more than or equal to 2;
step 3, after receiving the cargo state information inquiry request of the requester, the logistics company management center starts identity verification for the requester:
when the verification requesting party is the sender or receiver of the goods corresponding to the goods state information, the step 4 is shifted to; otherwise, the logistics company management center feeds back that the requester does not have the cargo state information inquiry authority; the cargo state information query request comprises a cargo list number of the cargo to be queried, the current position of the cargo and the current real-time video of the cargo;
step 4, the logistics company management center sends the goods information corresponding to the goods state information inquiry request to a logistics branch company which takes the goods;
step 5, the logistics branch company judges whether the goods are sent out according to the received goods state information inquiry request:
when the goods are judged to be sent out by the logistics vehicles, the logistics branch company sends logistics vehicle information for transporting the goods to a logistics company management center as target logistics vehicle information, and the step 6 is carried out; otherwise, the logistics branch company feeds back the cargo state information which is not sent out by the cargo temporarily to a management center of the logistics branch company, and the step 9 is carried out;
step 6, after the logistics company management center establishes wireless communication with the target logistics vehicle and the wireless communication state lasts for a preset time period, the logistics company management center sends the cargo state information inquiry request and a request for requesting the target logistics vehicle to autonomously start intelligent switching of the idle communication frequency band to the target logistics vehicle;
step 7, after receiving the cargo state information inquiry request and the request for intelligently switching the idle communication frequency band, the target logistics vehicle feeds back consent information to a logistics company management center;
step 8, the target logistics vehicle starts detection of an optimal idle communication frequency band in the current communication environment, and after the optimal idle communication frequency band is detected, the target logistics vehicle sends cargo state information of the cargo corresponding to the cargo state information inquiry request to a logistics company management center by using the optimal idle communication frequency band;
and 9, feeding back the received cargo state information to a requester for sending the current cargo state information query request by the logistics company management center.
Further, in the intelligent logistics management method for acquiring the cargo state information in real time, in step 8, the target vehicle detects an optimal idle communication frequency band in the current communication environment according to the following steps S1 to S9:
step S1, starting timing work of the target vehicle, acquiring a movement speed sequence of the target vehicle in a preset time period after the self-timing work is started according to a preset acquisition interval, and turning to step S2; wherein the preset time period is marked as T, the preset acquisition interval is marked as DeltaT, and the kth speed mark acquired in the preset time period TDenoted as v k The motion velocity sequence is marked as V, v= { V k }，1≤k≤K，
Step S2, the target vehicle obtains a vehicle speed interference factor and a vehicle speed interference fluctuation coefficient according to the obtained motion speed sequence, and the step S3 is carried out; wherein, the vehicle speed disturbance factor is marked as χ, and the vehicle speed disturbance fluctuation coefficient is marked as χ':
v max is the maximum value in the motion velocity sequence V min Is the minimum in the sequence of motion speeds V;
step S3, when the target vehicle starts timing work, each positioning device is enabled to acquire a real-time position point sequence of the target vehicle in a preset time period after the self-timing work is started according to the preset acquisition interval, and the step S4 is carried out; wherein the nth positioning device on the target vehicle is marked as device n Positioning device n The kth real-time position point acquired in the preset time period T is marked asReal-time location point->Is marked as +.>Positioning device n The corresponding real-time position sequence is marked +.> 1≤k≤K；2≤n≤N；
Step S4, the target vehicle obtains a vehicle position interference factor and a vehicle position interference fluctuation coefficient according to the real-time position point sequence corresponding to each positioning device in the preset time period, and the step S5 is carried out; wherein the vehicle position interference factor is marked asThe vehicle position disturbance factor is marked +.>
Step S5, the target vehicle starts detection work of each frequency spectrum sensing module aiming at idle communication at the same time when starting timing work, and each frequency spectrum sensing module acquires a signal-to-noise ratio sequence of the target vehicle in the preset time period according to the preset acquisition interval respectively, and the step S6 is carried out; wherein the target vehicle's u-th spectrum sensing module is labeled CR u Spectrum sensing module CR u The kth signal-to-noise ratio acquired within the preset time period T is marked asSpectrum sensing module CR u The signal-to-noise ratio sequence within the preset time period T is marked as +.> 2≤u≤U；
Step S6, the target vehicle respectively obtains the detection confidence of each spectrum sensing module according to the signal-to-noise ratio sequences corresponding to the spectrum sensing modules, and the step S7 is carried out; wherein, the spectrum sensing module CR u Is marked as the detection confidence of
Step S7, the target vehicle calculates a frequency band detection priority value when each frequency spectrum sensing module participates in idle communication frequency band detection according to the vehicle speed interference factor, the vehicle speed interference fluctuation coefficient, the vehicle position interference factor, the vehicle position interference fluctuation coefficient and the detection confidence coefficient of each frequency spectrum sensing module, and the step S8 is carried out; wherein, the spectrum sensing module CR u The frequency band detection priority number value is marked as
θ is a constant whose value is greater than zero;
step S8, the target vehicle selects a frequency spectrum sensing module with the maximum frequency band detection priority value, and takes the selected frequency spectrum sensing module as an optimal frequency spectrum sensing module for detecting an idle communication frequency band in the current communication environment;
step S9, the target vehicle enables the optimal frequency spectrum sensing module to select an idle communication frequency band in the communication environment of the current geographic position, and the selected idle communication frequency band is used as the optimal idle communication frequency band for the target vehicle to detect the idle communication frequency band in the current communication environment.
Compared with the prior art, the invention has the advantages that:
firstly, when a cargo state information inquiry request is aimed at, determining cargo state information corresponding to cargoes in the cargo state information inquiry request and a target vehicle for transporting the cargoes through real-time communication between a logistics company management center and the logistics company managed by the logistics company management center, then, after the target vehicle negotiates automatic starting switching of an idle communication frequency band with the logistics company management center, the target vehicle sends the state information of the cargoes corresponding to the cargo state information inquiry request to the logistics company management center in the switched idle communication frequency band, and then, the logistics company management center feeds the cargo state information sent by the target vehicle back to a legal requester of the cargo state information inquiry request, so that the actual requirement of real-time inquiry of the cargo state information of the requester is met;
secondly, when the target vehicle starts to select and detect idle communication frequency bands in surrounding communication environments, the influence of the actual speed and the geographic position of the transport vehicle serving as the target vehicle in the transportation process on the idle communication frequency bands in the communication environments where the vehicle is located is fully considered, the influence of the vehicle speed and the vehicle position can be represented in an index quantification mode by obtaining the vehicle speed interference factor, the vehicle speed interference fluctuation coefficient, the vehicle position interference factor and the vehicle position interference fluctuation coefficient, then the detection credibility degree of the idle communication frequency bands detected by each frequency spectrum sensing module on the target vehicle is mastered according to the detection credibility degree of each frequency spectrum sensing module, the frequency spectrum sensing module with the maximum detection credibility degree is further used as an optimal frequency spectrum sensing module, the idle communication frequency band detected by the optimal frequency spectrum sensing module is used as the optimal idle communication frequency band of the target vehicle in the current communication environment, and the data about cargo state information can be transmitted to a logistics company management center on the optimal idle communication frequency band, the situation that the cargo state information is influenced by the communication frequency band shortage in communication caused by various factors is avoided, the logistics company management center can acquire the cargo state information, and the cargo state information can be conveniently queried in real time.
Drawings
Fig. 1 is a schematic flow chart of an intelligent logistics management method for acquiring cargo state information in real time in an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the embodiments of the drawings.
The embodiment provides an intelligent logistics management method for acquiring cargo state information in real time, which is used for meeting cargo state information inquiry of a user on collected cargoes of a logistics company. Specifically, referring to fig. 1, the intelligent logistics management method for acquiring cargo state information in real time in this embodiment includes the following steps 1 to 9:
step 1, a logistics company management center registers and stores the information of a cargo list corresponding to cargoes received by each logistics branch company managed by the logistics company management center in advance; the goods list information comprises goods sender information, goods receiver information and logistics branch company information for receiving the goods, the goods sender information comprises a goods sender name, a goods sender contact address and a goods sender contact mobile phone number, the goods receiver information comprises a goods receiver name, a goods receiver contact address and a goods receiver contact mobile phone number, and the goods information comprises a goods name, a goods list number, a goods quality and a goods volume;
step 2, the logistics company management center communicates with each logistics company in real time to acquire the goods carrying state information arranged by each logistics company; the goods carrying state information comprises information about whether goods are sent by a logistics vehicle, a goods list number of the goods, logistics vehicle information corresponding to the sent goods and the time when the logistics vehicle leaves a logistics branch company; the logistics vehicles arranged and sent by the logistics branch companies are provided with N positioning devices and U frequency spectrum sensing modules, wherein N is more than or equal to 2, and U is more than or equal to 2; the time when the logistics vehicle leaves the logistics company is the time interval after the logistics company arranges the logistics vehicle to formally send out from the logistics company at the current moment;
the positioning device in the embodiment is used for acquiring geographic position information, and the frequency spectrum sensing module can detect the use state condition of the communication frequency band in the surrounding communication environment to obtain whether the communication frequency band is in an idle state or an occupied state;
step 3, after receiving the cargo state information inquiry request of the requester, the logistics company management center starts identity verification for the requester:
when the verification requester is the sender or receiver of the goods corresponding to the goods state information, the logistic company management center confirms that the current requester is a safe legal inquirer, and the current requester has legal authority and channels to acquire the goods information of the goods, and then the step 4 is carried out; otherwise, the logistics company management center considers the current requester as an unsafe inquirer, which possibly forms a potential safety hazard to the cargo information of the cargo, and then the logistics company management center feeds back that the requester does not have the cargo state information inquiry authority; the cargo state information query request comprises a cargo list number of the cargo to be queried, the current position of the cargo and the current real-time video of the cargo; the current real-time video of the cargo refers to the video of the cargo on the logistics vehicle, and the video is preferably a short video showing the surrounding carriage environment where the cargo is located;
step 4, the logistics company management center sends the goods information corresponding to the goods state information inquiry request to a logistics branch company which takes the goods;
step 5, the logistics branch company judges whether the goods are sent out according to the received goods state information inquiry request:
when the logistics branch company judges that the goods are sent out by the logistics vehicles, the logistics branch company sends logistics vehicle information for transporting the goods to a logistics company management center as target logistics vehicle information, and the step 6 is carried out; otherwise, the logistics branch company feeds back the cargo state information which is not sent out by the cargo temporarily to a management center of the logistics branch company, and the step 9 is carried out;
step 6, after the logistics company management center establishes wireless communication with the target logistics vehicle and the wireless communication state lasts for a preset time period, the logistics company management center sends a cargo state information inquiry request and a request for requesting the target logistics vehicle to autonomously start intelligent switching of the idle communication frequency band to the target logistics vehicle;
step 7, after receiving the cargo state information inquiry request and the request for intelligently switching the idle communication frequency band sent by the logistics company management center, the target logistics vehicle feeds back the consent information to the logistics company management center;
step 8, the target logistics vehicle starts detection of an optimal idle communication frequency band in the current communication environment, and after the optimal idle communication frequency band is detected, the target logistics vehicle sends cargo state information of cargoes corresponding to a cargo state information inquiry request to a logistics company management center by using the optimal idle communication frequency band; the target vehicle of this embodiment detects the optimal idle communication frequency band in the current communication environment according to the following steps S1 to S9:
step S1, starting timing work of a target vehicle, acquiring a motion speed sequence of the target vehicle in a preset time period after the self-timing work is started according to a preset acquisition interval, and turning to step S2;
wherein the preset time period is marked as T, the preset acquisition interval is marked as DeltaT, and the kth speed acquired in the preset time period T is marked as v k The motion velocity sequence is marked as V, v= { V k }，1≤k≤K，For example, in this embodiment, the preset time period T is set to 10 seconds, and the preset acquisition interval Δt is set to 0.5 seconds, so as to meet the actual requirement for cargo state inquiry in the logistics field;
step S2, the target vehicle obtains a vehicle speed interference factor and a vehicle speed interference fluctuation coefficient which have adverse effects on idle communication frequency band detection according to the obtained motion speed sequence V, and the step S3 is carried out; wherein, the vehicle speed disturbance factor is marked as χ, and the vehicle speed disturbance fluctuation coefficient is marked as χ':
v max is the maximum value in the motion velocity sequence V min Is the minimum in the sequence of motion speeds V;
step S3, when the target vehicle starts timing work, each positioning device respectively acquires a real-time position point sequence of the target vehicle in a preset time period T after the self-timing work is started according to a preset acquisition interval DeltaT which is already set, and the step S4 is carried out; wherein the nth positioning device on the target vehicle is marked as device n Positioning device n The kth real-time position point acquired in the preset time period T is marked asReal-time location point->Is marked as +.>Positioning device n The corresponding real-time position sequence is marked +.> 1≤k≤K；2≤n≤N；
Step S4, the target vehicle obtains a vehicle position interference factor and a vehicle position interference fluctuation coefficient which adversely affect idle communication frequency band detection according to a real-time position point sequence corresponding to each positioning device in a preset time period T, and the step S5 is carried out; wherein the vehicle position interference factor is marked asThe vehicle position disturbance factor is marked +.>
Step S5, the target vehicle starts detection work of each frequency spectrum sensing module aiming at idle communication at the same time when starting timing work, and each frequency spectrum sensing module acquires a signal-to-noise ratio sequence of the target vehicle in a preset time period T according to a preset acquisition interval DeltaT respectively, and the step S6 is carried out; wherein the target vehicle's u-th spectrum sensing module is labeled CR u Spectrum sensing module CR u The kth signal-to-noise ratio acquired within the preset time period T is marked asSpectrum sensing module CR u The signal-to-noise ratio sequence within the preset time period T is marked as +.> 2≤u≤U；
Step S6, the target vehicle respectively obtains the detection confidence coefficient of each spectrum sensing module according to the signal-to-noise ratio sequence corresponding to each spectrum sensing module, and the step S7 is carried out; wherein, the spectrum sensing module CR u Is marked as the detection confidence of
Step S7, the target vehicle is based on the vehicle speed disturbance factor χ, the vehicle speed disturbance fluctuation coefficient χ', and the vehicle position disturbance factorVehicle position disturbance factor->The detection confidence of each frequency spectrum sensing module is calculated to obtain a frequency band detection priority value when each frequency spectrum sensing module participates in idle communication frequency band detection, and the step S8 is carried out; wherein, the spectrum sensing module CR u The frequency band detection priority value of (2) is marked as +.>
θ is a constant whose value is greater than zero;
step S8, the target vehicle selects a frequency spectrum sensing module with the maximum frequency band detection priority value, and takes the selected frequency spectrum sensing module as an optimal frequency spectrum sensing module for detecting an idle communication frequency band in the current communication environment;
assume that, after calculation and comparison, in the frequency band detection priority values corresponding to all the spectrum sensing modules of the target vehicle, the 3 rd spectrum sensing module CR 3 Frequency band detection priority value of (2)For maximum frequency band detection priority value, the spectrum sensing module CR is used herein 3 The optimal frequency spectrum sensing module is used for detecting an idle communication frequency band in the current communication environment on the target vehicle;
step S9, the target vehicle enables the optimal frequency spectrum sensing module to select an idle communication frequency band in the communication environment of the current geographic position, and the selected idle communication frequency band is used as the optimal idle communication frequency band for the target vehicle to detect the idle communication frequency band in the current communication environment;
for example, after the spectrum sensing module CR has been selected 3 After being the optimal spectrum sensing module on the target vehicle, the step S9 here is to combine the spectrum sensing module CR 3 Taking the selected idle communication frequency band as the optimal idle communication frequency band of the idle communication frequency band in the communication environment where the target vehicle is detected currently;
and 9, feeding back the received cargo state information to a requester for sending the current cargo state information query request by the logistics company management center.
In the embodiment, the influence of the actual speed and the geographical position of the transport vehicle serving as the target vehicle in the transportation process on the idle communication frequency band in the current communication environment of the target vehicle is fully considered, the influence of the vehicle speed and the vehicle position can be represented in an index quantification mode by obtaining the vehicle speed interference factor, the vehicle speed interference fluctuation coefficient, the vehicle position interference factor and the vehicle position interference fluctuation coefficient, then the detection credibility degree of the idle communication frequency band detected by each frequency spectrum sensing module on the target vehicle is mastered according to the detection confidence degree of each frequency spectrum sensing module, the frequency spectrum sensing module with the maximum detection confidence degree is used as the optimal frequency spectrum sensing module, the idle communication frequency band detected by the optimal frequency spectrum sensing module is used as the optimal idle communication frequency band of the target vehicle in the current communication environment, the data about cargo state information can be ensured to be sent to a management center of a logistics company on the optimal idle communication frequency band, the cargo state information acquisition caused by communication shortage in communication caused by various factors is avoided, and finally the cargo state information acquisition of the logistics company can be acquired in real time by a convenient request.
While the preferred embodiments of the present invention have been described in detail, it is to be clearly understood that the same may be varied in many ways by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (1)
1. An intelligent logistics management method for acquiring cargo state information in real time is characterized by comprising the following steps of 1-9:
step 1, a logistics company management center registers and stores the information of a cargo list corresponding to cargoes received by each logistics branch company managed by the logistics company management center in advance; the goods list information comprises goods sender information, goods receiver information and logistics branch company information for receiving the goods, the goods sender information comprises a goods sender name, a goods sender contact address and a goods sender contact mobile phone number, the goods receiver information comprises a goods receiver name, a goods receiver contact address and a goods receiver contact mobile phone number, and the goods information comprises a goods name, a goods list number, a goods quality and a goods volume;
step 2, the logistics company management center communicates with each logistics branch company in real time to acquire the goods carrying state information arranged by each logistics branch company; the goods carrying state information comprises information about whether goods are sent by a logistics vehicle, a goods list number of the goods, logistics vehicle information corresponding to the sent goods and the time when the logistics vehicle leaves a logistics branch company; the logistics vehicles arranged and sent by the logistics branch companies are provided with N positioning devices and U frequency spectrum sensing modules, wherein N is more than or equal to 2, and U is more than or equal to 2;
step 3, after receiving the cargo state information inquiry request of the requester, the logistics company management center starts identity verification for the requester:
when the verification requesting party is the sender or receiver of the goods corresponding to the goods state information, the step 4 is shifted to; otherwise, the logistics company management center feeds back that the requester does not have the cargo state information inquiry authority; the cargo state information query request comprises a cargo list number of the cargo to be queried, the current position of the cargo and the current real-time video of the cargo;
step 4, the logistics company management center sends the goods information corresponding to the goods state information inquiry request to a logistics branch company which takes the goods;
step 5, the logistics branch company judges whether the goods are sent out according to the received goods state information inquiry request:
when the goods are judged to be sent out by the logistics vehicles, the logistics branch company sends logistics vehicle information for transporting the goods to a logistics company management center as target logistics vehicle information, and the step 6 is carried out; otherwise, the logistics branch company feeds back the cargo state information which is not sent out by the cargo temporarily to a management center of the logistics branch company, and the step 9 is carried out;
step 6, after the logistics company management center establishes wireless communication with the target logistics vehicle and the wireless communication state lasts for a preset time period, the logistics company management center sends the cargo state information inquiry request and a request for requesting the target logistics vehicle to autonomously start intelligent switching of the idle communication frequency band to the target logistics vehicle;
step 7, after receiving the cargo state information inquiry request and the request for intelligently switching the idle communication frequency band, the target logistics vehicle feeds back consent information to a logistics company management center;
step 8, the target logistics vehicle starts detection of an optimal idle communication frequency band in the current communication environment, and after the optimal idle communication frequency band is detected, the target logistics vehicle sends cargo state information of the cargo corresponding to the cargo state information inquiry request to a logistics company management center by using the optimal idle communication frequency band;
step 9, the logistics company management center feeds the received cargo state information back to a requester for sending a current cargo state information query request;
in step 8, the target vehicle detects an optimal idle communication frequency band in the current communication environment according to the following steps S1 to S9:
step S1, starting timing work of a target vehicle, acquiring a motion speed sequence of the target vehicle in a preset time period after the self-timing work is started according to a preset acquisition interval, and turning to step S2; wherein the preset time period is marked as T, the preset acquisition interval is marked as DeltaT, and the kth speed acquired in the preset time period T is marked as v k The motion velocity sequence is marked as V, v= { V k }，1≤k≤K，
Step S2, the target vehicle obtains a vehicle speed interference factor and a vehicle speed interference fluctuation coefficient according to the obtained motion speed sequence, and the step S3 is carried out; wherein, the vehicle speed disturbance factor is marked as χ, and the vehicle speed disturbance fluctuation coefficient is marked as χ':
v max is the maximum value in the motion velocity sequence V min Is the minimum in the sequence of motion speeds V;
step S3, when the target vehicle starts timing work, each positioning device respectively acquires a real-time position point sequence of the target vehicle in a preset time period after the self-timing work is started according to the preset acquisition interval, and the step S4 is carried out; wherein the nth positioning device on the target vehicle is marked as device n Positioning device n The kth real-time position point acquired in the preset time period T is marked asReal-time location point->Is marked as +.>Positioning device n The corresponding real-time position sequence is marked +.>
Step S4, the target vehicle obtains a vehicle position interference factor and a vehicle position interference fluctuation coefficient according to the real-time position point sequence corresponding to each positioning device in the preset time period, and the step S5 is carried out; wherein the vehicle position interference factor is marked asThe vehicle position disturbance factor is marked +.>
Step S5, the target vehicle starts the detection work of each frequency spectrum sensing module aiming at idle communication at the same time when starting timing work, and each frequency spectrum sensing module acquires the signal-to-noise ratio sequence of the target vehicle in the preset time period according to the preset acquisition interval respectively, and the step S6 is carried out; wherein the target vehicle's u-th spectrum sensing module is labeled CR u Spectrum sensing module CR u Kth signal-to-noise ratio marker acquired within preset time period TIs thatSpectrum sensing module CR u The signal-to-noise ratio sequence within the preset time period T is marked as +.>
Step S6, the target vehicle respectively obtains the detection confidence coefficient of each spectrum sensing module according to the signal-to-noise ratio sequence corresponding to each spectrum sensing module, and the step S7 is carried out; wherein, the spectrum sensing module CR u Is marked as the detection confidence of
Step S7, the target vehicle calculates a frequency band detection priority value when each frequency spectrum sensing module participates in idle communication frequency band detection according to the vehicle speed interference factor, the vehicle speed interference fluctuation coefficient, the vehicle position interference factor, the vehicle position interference fluctuation coefficient and the detection confidence coefficient of each frequency spectrum sensing module, and the step S8 is carried out; wherein, the spectrum sensing module CR u The frequency band detection priority number value is marked as
θ is a constant whose value is greater than zero;
step S8, the target vehicle selects a frequency spectrum sensing module with the maximum frequency band detection priority value, and takes the selected frequency spectrum sensing module as an optimal frequency spectrum sensing module for detecting an idle communication frequency band in the current communication environment;
step S9, the target vehicle enables the optimal frequency spectrum sensing module to select an idle communication frequency band in the communication environment of the current geographic position, and the selected idle communication frequency band is used as the optimal idle communication frequency band for the target vehicle to detect the idle communication frequency band in the current communication environment.
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