CN102385798B - Traffic information collecting method, device and system - Google Patents
Traffic information collecting method, device and system Download PDFInfo
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- CN102385798B CN102385798B CN201010270984.7A CN201010270984A CN102385798B CN 102385798 B CN102385798 B CN 102385798B CN 201010270984 A CN201010270984 A CN 201010270984A CN 102385798 B CN102385798 B CN 102385798B
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Abstract
The invention provides a traffic information collecting method, which is applied to a traffic information collecting system, and the traffic information collecting system comprises a traffic information center, a wireless communication network and a plurality of detecting vehicles with a vehicle-mounted device. The traffic information collecting method is that: the vehicle-mounted device collects traffic data, and the traffic data are transmitted to the traffic information center through a wireless communication network; after collecting the traffic information, the vehicle-mounted device defines the traffic regions of the traffic data and interlinks the traffic data with the traffic regions; after transmitting the traffic data, the vehicle-mounted device transmits the information of the traffic regions interlinked with the traffic data to the traffic information center; and the traffic information center groups the received traffic data and respectively performs traffic flow information evaluation to each group of the traffic data. The traffic data interlinked with the information of the same traffic region belong to the same group. The invention further provides a corresponding traffic information collecting device and the traffic information collecting system. The traffic information collecting method, the traffic information collecting device and the traffic information collecting system can improve the processing efficiency of the traffic information center and reducing operation cost and computer loads.
Description
Technical field
The present invention relates to traffic information collection technology, particularly one is based on traffic information collecting method, device and the system of floating vehicle data (FCD, Floating Car Data).
Background technology
Along with Chinese society and economic develop rapidly, urban traffic blocking and supersaturation are on the rise, for improving urban traffic blocking situation, start progressively to set up intelligent transportation system (ITS in city at present, Intelligent Transportation System), it combines the technology such as artificial intelligence, traffic engineering, computer technology, information acquisition and Based Intelligent Control.Wherein, based on floating vehicle data (FCD, Floating Car Data) traffic information acquisition system be one of gordian technique of intelligent transportation system, GPS (the GPS that it can collect floating vehicles a large amount of in city, Global Position System) data analysis, to obtain city real-time road traffic information.
Based on the traffic information acquisition system of FCD (see " traffic information acquisition system based on GPS Floating Car is studied ", author: Jiang Guiyan, Chang Ande, Zhang Wei, " transport information and safety " the 27th volume the 04th phase in 2009) mainly comprise: traffic information center, cordless communication network and a large amount of for gathering the detection vehicle (Probe Vehicle) of traffic data, it is also referred to as floating vehicle, mainly utilizes urban taxi as detection vehicle at present.Each detection vehicle all deploys the mobile unit with GPS function and radio communication function, this mobile unit can gather traffic data with specific sampling rate (Sampling Rate) continuously, and the traffic data gathered comprises: the information such as latitude and longitude coordinates, time, speed, direction.The real time traffic data collected separately is sent to traffic information center by cordless communication network by the mobile unit in each detection vehicle, is focused on these traffic datas by traffic information center, to generate road traffic flow information.Wherein, mobile unit sends to the data of traffic information center specifically to comprise: the field such as No. ID, mobile unit, latitude and longitude coordinates, instantaneous velocity, direction, turn around time, travel condition of vehicle; The data that traffic information center is uploaded mobile unit store, pre-service, in conjunction with map use corresponding computation model, estimating and forecasting is carried out to the such as traffic parameter such as speed, journey time, thus obtain the dynamic in real time traffic flow information of whole road network, such as comprise: travel speed, running time and congestion etc.
But, in the traffic information acquisition system of a city (especially super-large city), the detection vehicle of substantial amounts will be had, it all will be uploaded to traffic information center at the traffic data that each time period collects by the mobile unit in each detection vehicle, traffic information center is after receiving the traffic data from each detection vehicle, need by map match and utilize corresponding computation model, these traffic datas are finally processed into the traffic flow information of each bar road in city, wherein, first traffic information center will restore the ride characteristic of each detection vehicle, such as comprise: Vehicle Speed, running time, travel direction etc., and then assemble the ride characteristic of all detection vehicles that restores to estimate the traffic flow information of road.Like this, for the operation complexity of single detective vehicle and calculated amount larger, meanwhile, the quantity of detection vehicle is also very large, therefore, traffic information center needs the very high running cost of burden and has very high computing power to maintain a substantially qualified traffic flow information to estimate.
Summary of the invention
For solving the problems of the technologies described above, the embodiment of the present invention proposes a kind of traffic information collecting method, Apparatus and system, utilizes system resource to estimate to complete traffic flow information more fully to enable traffic information center.
Embodiments provide a kind of traffic information collecting method, the method is applied to a kind of traffic information acquisition system, described traffic information acquisition system comprises: traffic information center, cordless communication network and multiple detection vehicle with mobile unit, the method comprises: described mobile unit gathers traffic data, and transmits described traffic data to described traffic information center by described cordless communication network; Further, described mobile unit, after the described traffic data of collection, is determined the traffic zone belonging to described traffic data, and is associated with the information of traffic zone belonging to it by described traffic data; Wherein, the Region dividing that described traffic information acquisition system covers by the multiple communities covered based on described cordless communication network is in advance multiple traffic zone, wherein, a traffic zone comprises one or more community, and sets up the mapping identified to traffic zone from cell ID CELL ID; Described traffic data according to the described mapping that identifies from CELL ID to traffic zone and the traffic zone mark determining affiliated traffic zone from the CELL ID that described cordless communication network receives, and identifies with determined traffic zone and is associated by described mobile unit; Described mobile unit, when transmitting described traffic data, transmits the information of the traffic zone be associated with described traffic data to described traffic information center; And described traffic information center divides into groups to received traffic data, and respectively traffic flow information estimation is carried out to each group of traffic data; Wherein, the traffic data be associated with the information of identical traffic zone belongs to same group.
The embodiment of the present invention additionally provides a kind of traffic information collecting apparatus, and this application of installation is in a kind of traffic information acquisition system, and described traffic information acquisition system comprises: traffic information center, cordless communication network and multiple detection vehicle; Described device is arranged in described detection vehicle; Described device comprises: global position system GPS module, wireless communication module and traffic zone relating module, wherein: described GPS module, for gathering traffic data; Described traffic zone relating module, for receiving the traffic data from described GPS module, determines the traffic zone belonging to described traffic data, and the information of described traffic data with the traffic zone belonging to it is associated; Wherein, the region that described traffic information acquisition system covers is divided into multiple traffic zone by the multiple microzonations covered based on described cordless communication network in advance, wherein, a traffic zone comprises one or more community, and foundation has the mapping identified to traffic zone from cell ID CELL ID; Described traffic zone relating module determines the traffic zone mark of affiliated traffic zone according to the described mapping that identifies from CELL ID to traffic zone and described wireless communication module from the CELL ID that described cordless communication network receives, and is identified with determined traffic zone by described traffic data and be associated; Described wireless communication module, for sending to described traffic information center by described cordless communication network by the information from the described traffic data of traffic zone relating module and the traffic zone of association thereof.
The embodiment of the present invention further provides a kind of traffic information acquisition system, comprising: traffic information center, cordless communication network and multiple detection vehicle, and wherein, described detection vehicle is with above-mentioned traffic information collecting apparatus; Described traffic information center is used for dividing into groups to received traffic data, and carries out traffic flow information estimation respectively to each group of traffic data; Wherein, the traffic data be associated with the information of identical traffic zone belongs to same group.
The method adopting the embodiment of the present invention to provide, Apparatus and system can significantly improve the treatment effeciency of traffic information center, make possibility is become for the distributed treatment of traffic data and parallel processing, and then reduce running cost and the calculated load of traffic information center.
Accompanying drawing explanation
Exemplary embodiment of the present invention will be described in detail by referring to accompanying drawing below, the person of ordinary skill in the art is more clear that above-mentioned and other feature and advantage of the present invention, in accompanying drawing:
Fig. 1 is the traffic information collecting method process flow diagram according to one embodiment of the invention;
Fig. 2 is the traffic information collecting method process flow diagram according to another embodiment of the present invention;
Fig. 3 is the traffic information collecting apparatus schematic diagram according to one embodiment of the invention;
Fig. 4 is the traffic information collecting apparatus process flow diagram according to another embodiment of the present invention;
Fig. 5 is the traffic information collecting method schematic diagram according to one embodiment of the invention;
Fig. 6 A is the traffic information collecting apparatus schematic diagram according to one embodiment of the invention;
Fig. 6 B is the traffic information collecting apparatus schematic diagram according to another embodiment of the present invention; And,
Fig. 7 is the traffic information acquisition system schematic diagram according to one embodiment of the invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only for explaining the present invention, being not intended to limit the present invention.
The embodiment of the present invention proposes a kind of traffic information collecting method, it is applied to traffic information acquisition system, this traffic information acquisition system comprises: traffic information center, cordless communication network and multiple detection vehicle with mobile unit, each mobile unit is for gathering traffic data, and the traffic data collected by cordless communication network transmission is to traffic information center.Further, mobile unit is after collection traffic data, determine the traffic zone belonging to this traffic data, and the information of this traffic data with the traffic zone belonging to it is associated, in addition, mobile unit, while transmission traffic data is to traffic information center, also transmits the information of the traffic zone be associated with traffic data.Afterwards, traffic information center divides into groups to received traffic data according to the information of received traffic zone, and carries out traffic flow information estimation respectively to each group of traffic data.
Wherein, the every a traffic data that mobile unit is sent to traffic information center all associates the information of a traffic zone, like this, traffic information center can determine according to the information of received traffic zone the traffic data belonging to each traffic zone, and then can divide into groups to received traffic data by traffic zone, be classified as one group by with the traffic data that the information of identical traffic zone is associated.When traffic information center carries out traffic flow information estimation to certain group traffic data, it can utilize this group traffic data to restore the ride characteristic of each detection vehicle in the traffic zone belonging to this group traffic data by map match, and then the ride characteristic assembling each detection vehicle in this traffic zone is to estimate the traffic flow information of road in this traffic zone, such as: estimate the Vehicle Speed in this traffic zone, congestion etc.
In embodiments of the present invention, the concrete grammar that gathered traffic data is associated with the information of traffic zone belonging to it by mobile unit can be:
1, the Region dividing covered by traffic information acquisition system based on longitude and latitude is in advance multiple traffic zone, that is: each traffic zone can be delimited by one group of longitude and latitude thresholding; For the every a traffic data collected, mobile unit can determine the traffic zone belonging to latitude and longitude coordinates in this part of traffic data according to the longitude and latitude thresholding for delimiting traffic zone, and by the information of determined traffic zone therewith part traffic data associate.
The Region dividing that traffic information acquisition system covers by the community 2, covered based on cordless communication network is in advance multiple traffic zone, a traffic zone is made to comprise one or more community, and the mapping relations set up between multiple traffic zone and multiple community, in these mapping relations, unique traffic zone can be determined according to a community; When collecting a traffic data at every turn, mobile unit determines the traffic zone at current place according to the mapping relations from community to traffic zone preset and the cell ID be currently received (CELL ID), then the information of the current traffic zone determined is associated with the traffic data of current collection.Here, described mapping relations from community to traffic zone can be implemented as the mapping table from cell ID (CELL ID) to the information of traffic zone; Because mobile unit itself possesses radio communication function, it can receive the CELL ID that cordless communication network issues when entering a community, the present invention can utilize cordless communication network to be handed down to this information of CELL ID of mobile unit to the traffic zone making mobile unit determine current place fast.
In embodiments of the present invention, the information that mobile unit transmits the traffic zone be associated with traffic data to the concrete grammar of traffic information center can be: transmitting in the communication information of traffic data to traffic information center at mobile unit increases new message unit, and this new message unit is for carrying the information of traffic zone.In addition, mobile unit can transmit the information of traffic data and traffic zone associated with it with active or passive mode to traffic information center.Here, so-called mode initiatively, refers to mobile unit and initiatively transmits data to traffic information center by predetermined time interval or in the mode that event triggers; So-called passive mode, refers to traffic information center and initiates request and extract data from mobile unit.
In embodiments of the present invention, can be each traffic zone setting unique identification (ID), this mark can be described as traffic zone mark (traffic zone ID), and like this, the information of above-mentioned traffic zone can be just traffic zone ID.In addition, the information of described traffic zone also can be other suitable information for identifying each traffic zone.
In embodiments of the present invention, compared with prior art, traffic information center collected all traffic datas need not be utilized to restore and the ride characteristic assembling all detection vehicles in region that traffic information acquisition system covers to carry out traffic flow information estimation, but the traffic flow information of each traffic zone is estimated respectively in the region that the traffic data through grouping can be utilized to cover traffic information acquisition system, traffic information center is enable to carry out distributed or parallel process to collected huge traffic data, and then the counting yield of traffic information center is significantly improved.
Fig. 1 is the traffic information collecting method process flow diagram according to the embodiment of the present invention.In this embodiment, the region that traffic information acquisition system covers is divided into multiple traffic zone based on longitude and latitude.As described in Figure 1, this flow process comprises the steps.
Step 101: the mobile unit in detection vehicle gathers traffic data.
Step 102: extract latitude and longitude coordinates in the traffic data that mobile unit gathers from step 101, and determine the traffic zone belonging to this latitude and longitude coordinates, afterwards, is associated this traffic data with the traffic zone ID of determined traffic zone.
Wherein, mobile unit can determine traffic zone belonging to this latitude and longitude coordinates according to one group that presets for the longitude and latitude thresholding of delimiting traffic zone.Such as: the region that traffic information acquisition system covers can be divided into four quadrants (quadrant 1, quadrant 2, quadrant 3, quadrant 4) by longitude and latitude, these four quadrants are similar to four quadrants in two-dimensional coordinate system, they are corresponding four traffic zones respectively, latitude and longitude coordinates (the A that the common initial point of these four quadrants is corresponding, B) just can as group longitude and latitude thresholding of for delimiting traffic zone (wherein, A is longitude thresholding, and B is latitude thresholding); Assuming that the latitude and longitude coordinates extracted from traffic data is (X, Y), wherein, X is longitude, and Y is latitude, then: 1) if X equals A greatly and Y equals greatly B, then latitude and longitude coordinates (X, Y) belongs to the traffic zone of quadrant 1 correspondence; 2) if X equals A greatly and Y is less than B, then latitude and longitude coordinates (X, Y) belongs to the traffic zone of quadrant 2 correspondence; 3) if X is less than A and Y equals B greatly, then latitude and longitude coordinates (X, Y) belongs to the traffic zone of quadrant 3 correspondence; 4) if X is less than A and Y is less than B, then latitude and longitude coordinates (X, Y) belongs to the traffic zone of quadrant 4 correspondence.
Step 103: this mobile unit again by cordless communication network by the traffic zone ID of the traffic data that collects and association thereof to traffic information center transmission.
Wherein, mobile unit increases the message unit (Information Unit) for carrying traffic zone ID in the communication information for transmitting traffic data to traffic information center.Assuming that the region that traffic information acquisition system covers is divided into four traffic zones, then can increase the message unit of dibit (2bits) to carry traffic zone ID in this communication information, now, this communication information can comprise following message unit: vehicle ID, timestamp, GPS latitude and longitude coordinates, taxi state (as: takies, empty wagons, wait for ...), parameter (as: the speed derived, direction ...), sampling rate (as: indicate every 30 seconds and gather a traffic data), quadrant information (2bits) etc., wherein, quadrant information is used for carrying traffic zone ID.
Above-mentioned steps 101-103 is the process for a traffic data, and in actual applications, mobile unit can collect many parts of traffic datas by predetermined sampling rate, all can perform the process of above-mentioned steps 101-103 for gathered every a traffic data.
Step 104: through the process of above-mentioned steps 101-103, traffic information center receives the traffic zone ID of a large amount of traffic datas and each auto correlation thereof, afterwards, traffic information center divides into groups to traffic data by traffic zone ID, that is: the traffic data be associated with identical traffic zone ID is classified as one group, and respectively traffic flow information estimation is carried out to each group of traffic data, such as: estimate the Vehicle Speed in certain traffic zone, congestion etc.
Fig. 2 is the traffic information collecting method process flow diagram according to another embodiment of the present invention.In this embodiment, the community that covers based on cordless communication network, the region that covers of traffic information acquisition system and be divided into multiple traffic zone.As described in Figure 2, this flow process comprises the steps.
Step 201: the mobile unit in detection vehicle gathers traffic data.
Step 202: the traffic zone ID of the current traffic zone determined according to the mapping relations from community to traffic zone preset and the traffic zone determining current place from the CELL ID that wireless network receives, then associates with the traffic data of current collection by mobile unit.
Concrete, the mapping table from CELL ID to traffic zone ID can be provided with in advance in this mobile unit, utilize this mapping table, mobile unit can determine the traffic zone ID of current place traffic zone fast from the CELL ID that cordless communication network receives according to it.
Step 203: this mobile unit again by cordless communication network by the traffic zone ID of the traffic data that collects and association thereof to traffic information center transmission.Specific implementation and the abovementioned steps 103 of this step are similar, repeat no more here.
Step 204: through the process of above-mentioned steps 201-203, traffic information center receives the traffic zone ID of a large amount of traffic datas and each auto correlation thereof, afterwards, traffic information center divides into groups to traffic data by traffic zone ID, that is: the traffic data be associated with identical traffic zone ID is classified as one group, and carries out traffic flow information estimation respectively to each group of traffic data.
Above-mentioned steps 201-203 is the process for a traffic data, and in actual applications, mobile unit can collect many parts of traffic datas by predetermined sampling rate, all can perform the process of above-mentioned steps 201-203 for gathered every a traffic data.
Based on the traffic information collecting method that the invention described above embodiment provides, the embodiment of the present invention additionally provides a kind of traffic information collecting apparatus, it is applied to traffic information acquisition system, and this traffic information acquisition system comprises: traffic information center, cordless communication network and multiple detection vehicle.This traffic information collecting apparatus is arranged in detection vehicle, for gathering traffic data, by cordless communication network, the traffic data collected is sent to traffic information center; Further, this traffic information collecting apparatus is used for the traffic zone determined after gathering traffic data belonging to this traffic data, again the information of this traffic data with the traffic zone belonging to it is associated, and when transmitting traffic data to traffic information center, transmit the information of the traffic zone be associated with traffic data further.This traffic information collecting apparatus can be implemented as the mobile unit in detection vehicle or be integrated in mobile unit.This traffic information collecting apparatus can comprise: GPS module, wireless communication module and traffic zone relating module, wherein:
GPS module, for gathering traffic data.
Traffic zone relating module, for receiving the traffic data from GPS module, determines the traffic zone belonging to this traffic data, and the information of this traffic data with the traffic zone belonging to it is associated.
Wireless communication module, for sending to traffic information center by cordless communication network by the information from the traffic data of traffic zone association module and the traffic zone of association thereof.
In an embodiment of the present invention, the every a traffic data that traffic zone relating module can collect for GPS module, determine the traffic zone belonging to the latitude and longitude coordinates in this part of traffic data, and by the information of determined traffic zone therewith part traffic data associate.Here, the Region dividing covered by traffic information acquisition system based on longitude and latitude is in advance multiple traffic zone, that is: each traffic zone can be delimited by one group of longitude and latitude thresholding, like this, traffic zone relating module can determine the traffic zone belonging to latitude and longitude coordinates in this part of traffic data according to the longitude and latitude thresholding for delimiting traffic zone.
In an alternative embodiment of the invention, the a traffic data that traffic zone relating module collects for GPS module at every turn, the CELL ID that can be currently received according to the mapping relations from community to traffic zone preset and wireless communication module determines the traffic zone at current place, then the information of the current traffic zone determined is associated with the traffic data of current collection.Here, described mapping relations from community to traffic zone can be implemented as the mapping table from CELL ID to traffic zone ID; During owing to entering a community at detection vehicle, wireless communication module can receive the CELL ID that cordless communication network issues, and the traffic zone relating module in the embodiment of the present invention can utilize this information of CELLID that cordless communication network is handed down to wireless communication module to determine the traffic zone at current place fast.Here, the Region dividing that traffic information acquisition system covers by the community covered based on cordless communication network is in advance multiple traffic zone, a traffic zone is made to comprise one or more community, and the mapping relations set up between multiple traffic zone and multiple community, in these mapping relations, unique traffic zone can be determined according to a community.
In embodiments of the present invention, the information of the traffic zone that radio communication mold block transfer is associated with traffic data to the concrete grammar of traffic information center can be: in the communication information transmitting traffic data to traffic information center, increase new message unit, and this new message unit is for carrying the information of traffic zone.In addition, wireless communication module can transmit the information of traffic data and traffic zone associated with it with active or passive mode to traffic information center.
Fig. 3 is the traffic information collecting apparatus schematic diagram according to the embodiment of the present invention.In this embodiment, the region that traffic information acquisition system covers is divided into multiple traffic zone based on longitude and latitude.As shown in Figure 3, this traffic information collecting apparatus comprises: GPS module 301, wireless communication module 302 and traffic zone relating module 303, wherein:
GPS module 301 gathers traffic data.
Traffic zone relating module 303 receives the traffic data from GPS module 301, from then on latitude and longitude coordinates is extracted in traffic data, and determine the traffic zone belonging to this latitude and longitude coordinates, afterwards, this traffic data is associated with the traffic zone ID of the traffic zone belonging to it.Here, traffic zone relating module 303 can determine traffic zone belonging to this latitude and longitude coordinates according to one group that presets for the longitude and latitude thresholding of delimiting traffic zone.
Wireless communication module 302 sends to traffic information center by cordless communication network by from the traffic data of traffic zone association module 303 and the traffic zone ID of association thereof.
Fig. 4 is the traffic information collecting apparatus schematic diagram according to another embodiment of the present invention.In this embodiment, the community that covers based on cordless communication network in advance, the region that covers of traffic information acquisition system and be divided into multiple traffic zone.As shown in Figure 4, this traffic information collecting apparatus comprises: GPS module 401, wireless communication module 402 and traffic zone relating module 403, wherein:
GPS module 401 gathers traffic data.
Traffic zone relating module 403 receives the traffic data from GPS module 401, and receives CELL ID from wireless communication module 402; According to this CELL ID and the traffic zone determining current place from community ID to the mapping relations of traffic zone ID that presets, then the traffic zone ID of the traffic zone at current place is associated with the traffic data of the current collection of GPS module 401.Here, traffic zone relating module 403 can be provided with the mapping table from CELL ID to traffic zone ID in advance, utilize this mapping table, traffic zone relating module 403 can determine the traffic zone ID of current place traffic zone fast from the CELL ID that cordless communication network receives according to wireless communication module 402.
Wireless communication module 402 receives CELL ID from cordless communication network and sends to traffic zone relating module 403, sends to traffic information center by cordless communication network by from the traffic data of traffic zone association module 403 and the traffic zone ID of association thereof.
On the basis of each embodiment of the invention described above, the preferred embodiments of the present invention also proposed a kind of improvement project of traffic information collecting method, to reduce running cost and the calculated load of traffic information center further.In this traffic information collecting method, mobile unit gathers traffic data with variable sampling rate further, and it can upgrade sampling rate according to place traffic zone and/or the change of residing time period.
In a preferred embodiment of the invention, mobile unit upgrades sampling rate according to the change of place traffic zone.The region that traffic information acquisition system covers is divided into multiple traffic zone in advance; When detection vehicle travels in the scope of crossing over multiple traffic zone, the traffic zone of the mobile unit in detection vehicle to place detects; When detect enter new traffic zone time, mobile unit can according to setting rule determine new sampling rate, then carry out traffic data collection with this new sampling rate.
Concrete, set rule can be the mapping relations of multiple traffic zone and multiple sampling rate, mobile unit detect enter new traffic zone time, can determine according to these mapping relations the sampling rate that this new traffic zone is corresponding; Optionally, set rule can also be the algorithm for calculating sampling rate, and can be identical or different for the algorithm for calculating sampling rate of different traffic zone, like this, mobile unit detect enter new traffic zone time, sampling rate can be calculated according to the algorithm for this new traffic zone.Here, the traffic zone that the algorithm for calculating sampling rate can detect with mobile unit, the travel speed/direction of detection vehicle etc. are relevant, about the concrete establishing method not content of the present invention of this kind of algorithm, are not further described here.
Adopt above-described embodiment, mobile unit just can be made to adopt different sampling rates at different traffic zones, such as: adopt higher sampling rate at the traffic zone of road network complexity, and adopt lower sampling rate at the relatively simple traffic zone of road network, and then significantly reduce the traffic data of redundancy, and significantly reduce the communications cost of cordless communication network and the running cost of traffic information center and calculated load.
In another preferred embodiment of the present invention, mobile unit upgrades sampling rate according to the change of residing time period.Now, divide the multiple time periods relevant to the magnitude of traffic flow in advance, such as divide three time periods: low discharge period 22:00-7:00, high flow capacity period 7:00-9:00 and 17:00-19:00, normal discharge period 9:00-17:00 and 19:00-22:00; When detect be in the new time period time (such as: enter into the high flow capacity period from the low discharge period), mobile unit can according to setting rule determine new sampling rate, then carry out traffic data collection with this new sampling rate.
Concrete, set rule can be the mapping relations of multiple time period and multiple sampling rate, mobile unit detect be in the new time period time, can determine according to these mapping relations the sampling rate that this new time period is corresponding; Optionally, set rule can be the algorithm for calculating sampling rate, and can be identical or different for the algorithm for calculating sampling rate of different time sections, like this, mobile unit detect be in the new time period time, sampling rate can be calculated according to the algorithm for this new time period.Here, the time period that the algorithm for calculating sampling rate can detect with mobile unit, the travel speed/direction of detection vehicle etc. are relevant, about the concrete establishing method not content of the present invention of this kind of algorithm, are not further described here.
Adopt above-described embodiment, mobile unit just can be made to adopt different sampling rates in the different time periods, such as: adopt higher sampling rate in the traffic peak period of high flow capacity, and adopt lower sampling rate in the period that flow is relatively low, and then significantly reduce the traffic data of redundancy, and significantly reduce the communications cost of cordless communication network and the running cost of traffic information center and calculated load.
In another preferred embodiment of the present invention, mobile unit upgrades sampling rate according to place traffic zone and the change of residing time period.Now, the region that traffic information acquisition system covers is divided into multiple traffic zone in advance, and divides the multiple time periods relevant to the magnitude of traffic flow; Mobile unit detects the traffic zone at place and residing time period thereof, when detect enter new traffic zone time, mobile unit can determine according to the rule of setting the new sampling rate that mobile unit should adopt in the current residing time period in the traffic zone that this is new, or, when detect be in the new time period time, mobile unit can according to setting rule determine the sampling rate that mobile unit should adopt at current place traffic zone within the time period that this is new.
Concrete, set rule can be multiple traffic zone, mapping relations between multiple time period and multiple sampling rate, mobile unit detect enter new traffic zone time, the sampling rate of each time period that this new traffic zone is corresponding can be determined according to these mapping relations, and then determine for the sampling rate corresponding to the current residing time period of this new traffic zone, optionally, set rule can be the algorithm for calculating sampling rate, and can be identical or different for the algorithm for calculating sampling rate of different traffic zone and different time sections, like this, mobile unit detect enter new traffic zone time, the sampling rate that mobile unit should adopt in the current residing time period in new traffic zone can be calculated according to the algorithm for this new traffic zone, or, mobile unit detect enter the new time period time, the sampling rate that mobile unit should adopt at current residing traffic zone within the new time period can be calculated according to the algorithm for this new time period.Here, travel speed/the directions of the traffic zone that can detect with mobile unit for the algorithm of calculating sampling rate, current residing time period, detection vehicle etc. are relevant, about the concrete establishing method not content of the present invention of this kind of algorithm, be not further described here.
Adopt above-described embodiment, not only consider the impact of traffic zone on sampling rate, but also consider the impact of the time period relevant to the magnitude of traffic flow on sampling rate, such as: adopt higher sampling rate at the traffic zone of road network complexity and adopt lower sampling rate at the relatively simple traffic zone of road network, Different periods in same traffic zone also can adopt different sampling rates, and then make the more realistic demand of the sampling rate of mobile unit, the traffic data of redundancy can be reduced further, the communications cost of the low cordless communication network of a step-down of going forward side by side and the running cost of traffic information center and calculated load, further raising is based on the performance of the traffic information acquisition system of FCD.
In the invention described above embodiment, mobile unit by gathered traffic data with when belonging to it, the information of traffic zone is associated, can detect the traffic zone at its place, and the concrete grammar that mobile unit detects traffic zone describes, and repeats no more above in detail here existing.
In the invention described above embodiment, for determining that the rule of sampling rate can be handed down to mobile unit by traffic information center by cordless communication network when mobile unit initialization, also can be the Default Value of mobile unit, further, this rule also can be dynamically updated by cordless communication network (as broadcast channel etc.) by traffic information center in mobile unit operational process.
Fig. 5 is the traffic information collecting method process flow diagram according to the embodiment of the present invention.In this embodiment, the community that the region that traffic information acquisition system covers covers based on cordless communication network and be divided into multiple traffic zone, wherein, each traffic zone comprises one or more community.As shown in Figure 5, this flow process comprises the steps:
Step 501: the mobile unit in detection vehicle gathers traffic data with a certain sampling rate.
Step 502: mobile unit detect whether enter into new traffic zone, and when detect enter new traffic zone time, determine the sampling rate that new traffic zone is corresponding.
Concrete, the mapping table from CELL ID to traffic zone ID can be provided with in advance in this mobile unit, utilize this mapping table, mobile unit can determine the traffic zone ID of its current place traffic zone from the CELL ID that cordless communication network receives according to it, when mobile unit finds that determined traffic zone ID can determine to enter into new traffic zone when changing.
Concrete, above-mentioned mapping table can comprise the mapping from traffic zone ID to sampling rate further, like this, when detect enter new traffic zone time, utilize this mapping table, can map according to the traffic zone ID of new traffic zone and obtain sampling rate; Optionally, above-mentioned mapping table also can comprise the mapping from traffic zone ID to the algorithm for calculating sampling rate further, like this, when detect enter new traffic zone time, utilize this mapping table, can map according to the traffic zone ID of new traffic zone and obtain an algorithm, can sampling rate be calculated according to this algorithm.
Concrete, the aforementioned mapping from traffic zone ID to sampling rate can also be relevant to the time period, now, above-mentioned mapping table comprises from traffic zone ID to the mapping each time period and each sampling rate, mobile unit detect enter new traffic zone time, the sampling rate of each time period that this new traffic zone is corresponding can be determined according to traffic zone ID, and then determine the sampling rate that mobile unit should adopt in the current residing time period in the traffic zone that this is new; The aforementioned algorithm for calculating sampling rate also can be relevant to the time period, like this, mobile unit detect enter new traffic zone time, can map according to traffic zone ID and obtain the algorithm relevant to each time period, then utilize this algorithm to calculate the sampling rate that mobile unit should adopt in the current residing time period in new traffic zone.
Step 503: the sampling rate that mobile unit is determined with step 502 gathers traffic data.
Above-mentioned steps 502-503 is that mobile unit gathers traffic data and upgrades the processing procedure of sampling rate, and parallel, mobile unit also performs following steps:
Step 504: the every a traffic data collected is associated with corresponding traffic zone ID.The specific implementation of this step, as described in preceding step 202, repeats no more here.
Step 505: this mobile unit again by cordless communication network by the traffic zone ID of the traffic data that collects and association thereof to traffic information center transmission.Specific implementation and the abovementioned steps 103 of this step are similar, repeat no more here.
Step 506: through the process of above-mentioned steps 501-505, traffic information center receives the traffic zone ID of a large amount of traffic datas and each auto correlation thereof, afterwards, traffic information center divides into groups to traffic data by traffic zone ID, that is: the traffic data be associated with identical traffic zone ID is classified as one group, and carries out traffic flow information estimation respectively to each group of traffic data.
Adopt above-described embodiment, the treatment effeciency of traffic information center can not only be improved, significantly can also reduce mobile unit needs the data of collection and transmission and traffic information center to need data volume to be processed, and then significantly reducing the communications cost of cordless communication network, the running cost of traffic information center and calculated load also will reduce further.
Above Fig. 5 only gives a kind of embodiment of the inventive method; aforesaid various detection traffic zone and upgrade sampling rate method and traffic data is associated with the information of traffic zone belonging to it and the method sending traffic information center to all can combination in any to form various embodiment; here describe in detail no longer one by one, but all fall within protection scope of the present invention.
Accordingly, on the basis of aforementioned traffic information collecting apparatus, the embodiment of the present invention additionally provides a kind of traffic information collecting apparatus of improvement, it is applied to traffic information acquisition system, this traffic information acquisition system comprises: traffic information center, cordless communication network and multiple detection vehicle, described traffic information collecting apparatus is arranged in detection vehicle, except the function of aforementioned traffic information collecting apparatus can be realized, it also for gathering traffic data by sampling rate, and can upgrade sampling rate according to place traffic zone and/or the change of residing time period.This device can be implemented as the mobile unit in detection vehicle or be integrated in mobile unit.This device comprises sampling rate update module further relative to aforementioned traffic information collecting apparatus, and namely this device comprises: GPS module, wireless communication module, traffic zone relating module and sampling rate update module, wherein:
GPS module, for gathering traffic data with certain sampling rate.
Traffic zone relating module, for receiving the traffic data from GPS module, determines the traffic zone belonging to this traffic data, and the information of this traffic data with the traffic zone belonging to it is associated.
Wireless communication module, for sending to traffic information center by cordless communication network by the information from the traffic data of traffic zone association module and the traffic zone of association thereof.
Sampling rate update module, for upgrading the sampling rate of GPS module according to place traffic zone and/or the change of residing time period.
In an embodiment of the present invention, sampling rate update module upgrades sampling rate according to the change of place traffic zone.Now, the Region dividing that can be covered by traffic information acquisition system is in advance multiple traffic zone; When detection vehicle travels in the scope of crossing over multiple traffic zone, the traffic zone of sampling rate update module to place detects, or receives the information of traffic zone to determine the traffic zone at current place from traffic zone relating module; When determining to enter new traffic zone, sampling rate update module can determine according to the rule of setting the new sampling rate that GPS module should adopt.
In an alternative embodiment of the invention, sampling rate update module upgrades sampling rate according to the change of residing time period.Now, the multiple time periods relevant to the magnitude of traffic flow can be divided in advance; When determining to be in the new time period, sampling rate update module can determine according to the rule of setting the new sampling rate that GPS module should adopt.
In still another embodiment of the process, sampling rate update module upgrades sampling rate according to place traffic zone and the change of residing time period.Now, the Region dividing that can be covered by traffic information acquisition system is in advance multiple traffic zone, and divides the multiple time periods relevant to the magnitude of traffic flow.Sampling rate update module can detect the traffic zone at place and residing time period thereof, when detect enter new traffic zone time, sampling rate update module can determine GPS module in new traffic zone in the new sampling rate that the current residing time period should adopt according to the rule of setting, or, when detect be in the new time period time, sampling rate update module can according to setting rule determine GPS module within the time period that this is new in the sampling rate that current place traffic zone should adopt.Sampling rate update module also directly can determine the traffic zone at current place according to the information from the traffic zone of traffic zone relating module, and detect the residing time period, when determining to enter new traffic zone, sampling rate update module can determine GPS module in new traffic zone in the new sampling rate that the current residing time period should adopt according to the rule of setting, or, when determining to be in the new time period, sampling rate update module can determine GPS module within the time period that this is new in the sampling rate that current place traffic zone should adopt according to the rule of setting.
In each embodiment above-mentioned, determine that the concrete grammar of the new sampling rate that GPS module should adopt describes in detail existing above according to the rule of setting, repeat no more here.
In the invention described above embodiment, the concrete grammar that the concrete grammar that sampling rate update module detects place traffic zone and described traffic zone relating module above detect affiliated traffic zone is identical, repeats no more here.In the invention described above embodiment, for determining that the rule of sampling rate can be handed down to wireless communication module by traffic information center by cordless communication network when traffic information collecting apparatus initialization, by wireless communication module, this rule is sent to sampling rate update module, this rule also can be the Default Value of sampling rate update module; Further, this rule also can be dynamically updated by the broadcast channel etc. of traffic information center by cordless communication network in traffic information collecting apparatus operational process, wherein, by cordless communication network, the rule of renewal is handed down to wireless communication module by traffic information center, and by wireless communication module, this rule upgraded is sent to sampling rate update module.
About traffic zone relating module the information of principle and radio communication mold block transfer traffic data and affiliated traffic zone thereof that realizes realize principle, describe in detail existing above, repeat no more here.
Fig. 6 A is the traffic information collecting apparatus schematic diagram according to one embodiment of the invention.In this embodiment, multiple community that the region that traffic information acquisition system covers covers based on cordless communication network and be divided into multiple traffic zone, wherein, each traffic zone comprises one or more community.As shown in Figure 6A, this traffic information collecting apparatus comprises: GPS module 601, wireless communication module 602, traffic zone relating module 603 and sampling rate update module 604, wherein:
GPS module 601 gathers traffic data with a certain sampling rate.
Wireless communication module 602 receives CELL ID from cordless communication network and sends to traffic zone relating module 603, sends to traffic information center by cordless communication network by from the traffic data of traffic zone association module 603 and the traffic zone ID of association thereof.
Traffic zone relating module 603 receives the traffic data from GPS module 601, CELL ID is received from wireless communication module 602, determine the traffic zone at current place according to the mapping relations from community to traffic zone preset and CELLID, then the traffic zone ID of the current traffic zone determined is associated with the traffic data of the current collection of GPS module 601.Here, traffic zone relating module 603 can be provided with the mapping table from CELL ID to traffic zone ID in advance, utilize this mapping table, traffic zone relating module 603 can determine the traffic zone ID of current place traffic zone fast from the CELL ID that cordless communication network receives according to wireless communication module 602.
Sampling rate update module 604 detects whether enter into new traffic zone, detect enter new traffic zone time, determine the sampling rate that new traffic zone is corresponding, and the sampling rate of GPS module 601 be updated to current determined sampling rate.
Concrete, the mapping table from CELL ID to traffic zone ID can be provided with in advance in sampling rate update module 604, utilize this mapping table, sampling rate update module 604 can determine the traffic zone ID of current place traffic zone from the CELL ID that cordless communication network receives according to wireless communication module 602, when sampling rate update module 203 finds that determined traffic zone ID can determine to enter into new traffic zone when changing.
The mapping from traffic zone ID to sampling rate can be provided with in sampling rate update module 604 further in advance, like this, when detect enter new traffic zone time, utilize this mapping table, can map according to the traffic zone ID of new traffic zone and obtain sampling rate; Optionally, above-mentioned mapping table also can comprise the mapping from traffic zone ID to the algorithm for calculating sampling rate further, like this, when sampling rate update module 604 detect enter new traffic zone time, utilize this mapping table, can map according to the traffic zone ID of new traffic zone and obtain an algorithm, then calculate according to this algorithm the sampling rate that GPS module 601 adopts new traffic zone planted agent.
Optionally, the aforementioned mapping from traffic zone ID to sampling rate can also be relevant with the time period, now, above-mentioned mapping table comprises from traffic zone ID to the mapping each time period and each sampling rate, sampling rate update module 604 detect enter new traffic zone time, the sampling rate of each time period that this new traffic zone is corresponding can be determined according to traffic zone ID, and then determine the sampling rate that GPS module 601 should adopt in the current residing time period in the traffic zone that this is new; Optionally, the aforementioned algorithm for calculating sampling rate also can be relevant to the time period, like this, sampling rate update module 604 detect enter new traffic zone time, can map according to traffic zone ID and obtain the algorithm relevant to each time period, then utilize this algorithm to calculate the sampling rate that GPS module 601 should adopt in the current residing time period in new traffic zone.
Fig. 6 B is the traffic information collecting apparatus schematic diagram according to another embodiment of the present invention.In this embodiment, multiple community that the region that traffic information acquisition system covers covers based on cordless communication network and be divided into multiple traffic zone, wherein, each traffic zone comprises one or more community.As shown in Figure 6B, this traffic information collecting apparatus comprises: GPS module 601, wireless communication module 602, traffic zone relating module 603 ' and sampling rate update module 604 ', wherein:
GPS module 601 gathers traffic data with a certain sampling rate.
Wireless communication module 602 receives CELL ID from cordless communication network and sends to traffic zone relating module 603 ', sends to traffic information center by cordless communication network by from the traffic data of traffic zone association module 60 ' 3 and the traffic zone ID of association thereof.
Traffic zone relating module 603 ' receives the traffic data from GPS module 601, CELL ID is received from wireless communication module 602, the traffic zone at current place is determined according to the mapping relations from community to traffic zone preset and CELLID, again the traffic zone ID of the current traffic zone determined is associated with the traffic data of the current collection of GPS module 601, and send this traffic zone ID to sampling rate update module 604 '.Here, traffic zone relating module 603 ' adopts with the traffic zone relating module 603 in Fig. 6 A the traffic zone using the same method to determine current place, repeats no more here.
Sampling rate update module 604 ' judges whether to enter new traffic zone according to the traffic zone ID from traffic zone relating module 603 ', when determining to enter new traffic zone, and then determine the sampling rate that new traffic zone is corresponding, and the sampling rate of GPS module 601 is updated to current determined sampling rate.Here, when sampling rate update module 604 ' finds that traffic zone ID changes, namely the current traffic zone ID received is different from the traffic zone ID received last time, just can determine to enter new traffic zone.Sampling rate update module 604 ' and the sampling rate update module 604 in Fig. 6 A are used for determining that the concrete grammar of the sampling rate that new traffic zone is corresponding is identical, repeat no more here.
Above Fig. 6 A and Fig. 6 B only gives two embodiments of apparatus of the present invention; the implementation of aforesaid various traffic zone relating module and the implementation of aforesaid various sampling rate update module all combination in any can form various device embodiment; here just describe in detail no longer one by one, but all fall within protection scope of the present invention.
The device that the invention described above embodiment provides can be implemented as hardware unit, also can be a kind of virtual bench realized with software mode.
The embodiment of the present invention additionally provides a kind of traffic information acquisition system, and it comprises: traffic information center, cordless communication network, multiple detection vehicle being deployed with mobile unit; Wherein, the mobile unit in each detection vehicle is for gathering traffic data, and the traffic data collected by cordless communication network transmission is to traffic information center.Further, mobile unit is after collection traffic data, determine the traffic zone belonging to this traffic data, and the information of this traffic data with the traffic zone belonging to it is associated, in addition, mobile unit, while transmission traffic data is to traffic information center, also transmits the information of the traffic zone be associated with traffic data; Traffic information center divides into groups to received traffic data according to the information of received traffic zone, and carries out traffic flow information estimation respectively to each group of traffic data.Optionally, mobile unit also can gather traffic data by certain sampling rate, by cordless communication network, the traffic data collected is sent to traffic information center, and upgrades sampling rate according to place traffic zone and/or the change of residing time period.
Concrete, the method that the mobile unit in said system can provide by the aforementioned embodiment of the present invention is to determine traffic zone belonging to traffic data and the information of this traffic data with the traffic zone belonging to it to be associated.
Concrete, the method that the mobile unit in said system can provide by the aforementioned embodiment of the present invention sends the information of traffic data and associated traffic zone thereof to traffic information center.
Concrete, the method that the mobile unit in said system can provide by the aforementioned embodiment of the present invention is to upgrade sampling rate.
Concrete, the traffic information center in said system can divide into groups to traffic data by the method provided by the aforementioned embodiment of the present invention and carry out traffic flow information estimation respectively to each group of traffic data.
Optionally, the traffic information collecting apparatus that the mobile unit in said system can provide for the aforementioned embodiment of the present invention or be built-in with this traffic information collecting apparatus.
Optionally, traffic information center in said system can issue for determining that the rule of sampling rate is to mobile unit by cordless communication network when mobile unit initialization, further, this rule also can be dynamically updated by the broadcast channel etc. of traffic information center by cordless communication network in mobile unit operational process.
Fig. 7 is the traffic information acquisition system schematic diagram according to the embodiment of the present invention.As shown in Figure 7, this system comprises: traffic information center, cordless communication network, multiple detection vehicle deploying mobile unit, as the detection vehicle 1 in Fig. 7, detection vehicle 2 ..., detection vehicle n.Wherein:
Mobile unit in each detection vehicle gathers traffic data by certain sampling rate and is sent to traffic information center by cordless communication network, each mobile unit is after collection traffic data, determine the traffic zone belonging to this traffic data, the information of this traffic data with the traffic zone belonging to it is associated, and while transmission traffic data is to traffic information center, transmit the information of the traffic zone be associated with traffic data; Afterwards, traffic information center divides into groups to received traffic data according to the information of received traffic zone, and carries out traffic flow information estimation respectively to each group of traffic data.Here, the method that each mobile unit in detection vehicle 1 to detection vehicle n can provide by the aforementioned embodiment of the present invention determining traffic zone belonging to traffic data, traffic data be associated with the information of the traffic zone belonging to it, transmit traffic data and the information of traffic zone that associates thereof to traffic information center, repeat no more here about concrete methods of realizing.
Optionally, the mobile unit in each detection vehicle gathers traffic data by certain sampling rate, and upgrades sampling rate according to place traffic zone and/or the change of residing time period.Here, the method that each mobile unit in detection vehicle 1 to detection vehicle n can provide by the aforementioned embodiment of the present invention, to upgrade sampling rate, repeats no more here about the concrete grammar upgrading sampling rate.
Issue for determining that the rule of sampling rate is to mobile unit by cordless communication network during the mobile unit initialization of traffic information center in each detection vehicle; Further, in these mobile unit operational processs, traffic information center also dynamically updates the rule for determining sampling rate in mobile unit by cordless communication network (as by broadcast channel etc.).Wherein, the traffic information collecting apparatus that mobile unit can provide for previous embodiment or be built-in with this traffic information collecting apparatus, the specific implementation principle about this mobile unit repeats no more here.
Adopt traffic information collecting method, Apparatus and system that the invention described above embodiment provides, the information of the traffic zone utilizing the mobile unit in detection vehicle to upload, traffic information center can carry out distributed or parallel process to collected huge traffic data, and then the counting yield of traffic information center is significantly improved; Further, by realizing variable sampling rate, mobile unit needs the data gathering and transmit significantly to reduce, therefore, the communications cost of cordless communication network will significantly reduce, also will significantly reduce running cost and the calculated load of traffic information center further simultaneously, and then significantly improve the overall performance of the traffic information acquisition system based on FCD.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1. a traffic information collecting method, the method is applied to a kind of traffic information acquisition system, and described traffic information acquisition system comprises: traffic information center, cordless communication network and multiple detection vehicle with mobile unit, and described method comprises:
Described mobile unit gathers traffic data, and transmits described traffic data to described traffic information center by described cordless communication network;
It is characterized in that, described method comprises further:
Described mobile unit, after the described traffic data of collection, is determined the traffic zone belonging to described traffic data, and is associated with the information of traffic zone belonging to it by described traffic data; Wherein, the Region dividing that described traffic information acquisition system covers by the multiple communities covered based on described cordless communication network is in advance multiple traffic zone, wherein, a traffic zone comprises one or more community, and sets up the mapping identified from cell ID CELLID to traffic zone; Described traffic data according to the described mapping that identifies from CELL ID to traffic zone and the traffic zone mark determining affiliated traffic zone from the CELL ID that described cordless communication network receives, and identifies with determined traffic zone and is associated by described mobile unit;
Described mobile unit, when transmitting described traffic data, transmits the information of the traffic zone be associated with described traffic data to described traffic information center; And,
Described traffic information center divides into groups to received traffic data, and carries out traffic flow information estimation respectively to each group of traffic data; Wherein, the traffic data be associated with the information of identical traffic zone belongs to same group.
2. method according to claim 1, is characterized in that, increases the message unit of the information for carrying traffic zone in the communication information transmitting traffic data to described traffic information center;
Described mobile unit, when adopting described communication information to transmit described traffic data, carries the information of the traffic zone be associated with described traffic data in described message unit.
3. method according to claim 1, is characterized in that, described mobile unit gathers traffic data by sampling rate;
Described method comprises further: described mobile unit upgrades described sampling rate according to described detection vehicle place traffic zone and/or the change of residing time period.
4. method according to claim 3, is characterized in that, divides the multiple time periods relevant to the magnitude of traffic flow in advance;
Described mobile unit upgrades described sampling rate according to described detection vehicle place traffic zone and the change of residing time period, wherein:
When determining to enter new traffic zone, described mobile unit upgrades described sampling rate according in described new traffic zone in the sampling rate of current residing time period setting; Or,
When determining to be in the new time period, described mobile unit upgrades described sampling rate according within the described new time period in the sampling rate of current place traffic zone setting.
5. method according to claim 4, is characterized in that,
If the traffic zone mark of affiliated traffic zone changes, then determine to enter new traffic zone.
6. the method according to claim 4 or 5, it is characterized in that, the sampling rate of described setting is the Default Value of described mobile unit, or is handed down to described mobile unit by described traffic information center by described cordless communication network when described mobile unit initialization; And/or,
In described mobile unit operational process, the sampling rate of described setting is dynamically updated by described cordless communication network by described traffic information center.
7. a traffic information collecting apparatus, this application of installation is in a kind of traffic information acquisition system, described traffic information acquisition system comprises: traffic information center, cordless communication network and multiple detection vehicle, is characterized in that, described device is arranged in described detection vehicle; Described device comprises: global position system GPS module, wireless communication module and traffic zone relating module, wherein:
Described GPS module, for gathering traffic data;
Described traffic zone relating module, for receiving the traffic data from described GPS module, determines the traffic zone belonging to described traffic data, and the information of described traffic data with the traffic zone belonging to it is associated; Wherein, the region that described traffic information acquisition system covers is divided into multiple traffic zone by the multiple microzonations covered based on described cordless communication network in advance, wherein, a traffic zone comprises one or more community, and foundation has the mapping identified to traffic zone from cell ID CELL ID; Described traffic zone relating module determines the traffic zone mark of affiliated traffic zone according to the described mapping that identifies from CELL ID to traffic zone and described wireless communication module from the CELL ID that described cordless communication network receives, and is identified with determined traffic zone by described traffic data and be associated;
Described wireless communication module, for sending to described traffic information center by described cordless communication network by the information from the described traffic data of traffic zone relating module and the traffic zone of association thereof.
8. device according to claim 7, is characterized in that, described device comprises further: sampling rate update module:
Described GPS module, for gathering traffic data by sampling rate;
Described sampling rate update module, for upgrading the sampling rate of described GPS module according to described detection vehicle place traffic zone and/or the change of residing time period.
9. device according to claim 8, is characterized in that, has divided the multiple time periods relevant to the magnitude of traffic flow in advance; Described sampling rate update module is used for the sampling rate upgrading described GPS module according to described detection vehicle place traffic zone and the change of residing time period, wherein:
When determining to enter new traffic zone, described sampling rate update module is according to the sampling rate upgrading described GPS module in described new traffic zone in the sampling rate of current residing time period setting; Or,
When determining to be in the new time period, described sampling rate update module is according to the sampling rate upgrading described GPS module within the described new time period in the sampling rate of current place traffic zone setting.
10. device according to claim 8 or claim 9, is characterized in that, belonging to described sampling rate update module obtains from described traffic zone relating module, the information of traffic zone is to determine to enter new traffic zone.
11. devices according to claim 9, it is characterized in that, the sampling rate of described setting is the Default Value of described sampling rate update module, or, be handed down to described wireless communication module by described traffic information center by described cordless communication network when described traffic information collecting apparatus initialization, and send to described sampling rate update module by described wireless communication module; And/or,
In described traffic information collecting apparatus operational process, the sampling rate of described setting is dynamically updated by described traffic information center, wherein, the sampling rate of renewal is handed down to described wireless communication module by described cordless communication network by described traffic information center, and sends to described sampling rate update module by described wireless communication module.
12. 1 kinds of traffic information acquisition systems, comprising: traffic information center, cordless communication network and multiple detection vehicle, is characterized in that,
Device described in the with good grounds any one of claim 7 to 11 of described detection vehicle band;
Described traffic information center, for dividing into groups to received traffic data, and carries out traffic flow information estimation respectively to each group of traffic data; Wherein, the traffic data be associated with the information of identical traffic zone belongs to same group.
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| CN102842241A (en) * | 2012-09-04 | 2012-12-26 | 杨华龙 | Collection and transition method of real-time traffic information of limited region in front of car |
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| WO2017206019A1 (en) * | 2016-05-30 | 2017-12-07 | 华为技术有限公司 | Method, apparatus, vehicle terminal, and server for transmitting traffic message |
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