CN102081840A - Method for acquiring traffic information through mobile terminals - Google Patents
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- CN102081840A CN102081840A CN 200910241413 CN200910241413A CN102081840A CN 102081840 A CN102081840 A CN 102081840A CN 200910241413 CN200910241413 CN 200910241413 CN 200910241413 A CN200910241413 A CN 200910241413A CN 102081840 A CN102081840 A CN 102081840A
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Abstract
The invention discloses a method for acquiring traffic information through mobile terminals, belonging to the technical field of communication. The method comprises the following steps: using a network side traffic information extraction server to extract one or more than one mobile terminal in the network as the selected mobile terminal according to preset rules; continuously extracting position information of the selected mobile terminal, and tracking the position of the selected mobile terminal; and determining traffic information of the area of the terminal by using the network side traffic information extraction server according to the motion conditions of the tracked mobile terminal. In such a way, the invention can effectively utilize the 3G network and the mobile terminals in the 3G network to extract the traffic information. Meanwhile, the invention does not need to add a new hardware module to the mobile terminal so as to lower the initial input for traffic information acquisition, and can be used for acquiring accurate traffic information by means of precise positioning and sufficient terminal samples.
Description
Technical field
The present invention relates to communication technique field, particularly a kind of method of obtaining transport information by portable terminal.
Background technology
The transport information of widespread usage is extracted and is mainly contained three kinds at present, and the one, by camera being installed, directly take to obtain the transport information in this highway section in each highway section.The 2nd, installation site detection module (as GPS) on vehicle detects Vehicle Speed during vehicle ', judge the road section traffic volume situation, and the traffic conditions in each highway section, vehicle place is passed on to other vehicles mutually.The 3rd, rely on as sensors such as radar, magnetic induction loop detection means, rubber pipelines, just derive such as transport information parameters such as car speed, vehicle commander, wagon flow and traffic densities by using a plurality of these type of sensors.More than three kinds of transport information extracting method separately defective is all arranged.The method expense of setting up video camera based on the crossing is higher, and meteorological condition is bigger to its influence.The method of obtaining transport information based on vehicle installation site detection module only is fit to be applied on the specific industry users such as taxi, be difficult for extensively promoting to other vehicles, therefore the sample size that can extract transport information is less, is difficult to realize covering in real time the transport information of whole city.And adopt sensors such as magnetic induction loop detection means, rubber pipeline to carry out the transport information extracting method, and exist device uneconomical, very flexible, road pavement has shortcomings such as destructiveness.
The present inventor has submitted a Chinese patent application to, and the patent No. is 200910090194.8, and name is called " localization method in a kind of mobile communication system and portable terminal, location-server ".Mobile phone positioning method in a kind of mobile communcations system is disclosed in this part patented claim, and the portable terminal with mobile positioning function, and location-server.
Adopt above-mentioned technology to position, in the 3G system, can extract the location information of mobile terminal in this network, position by the specific portable terminal of Continuous Tracking in a period of time, just the moving direction of decidable portable terminal and translational speed take this to judge the traffic of portable terminal region.But in extracting based on the transport information of 3G portable terminal, mobile location information of terminals will make system's operating load excessive under all these systems if all feed back, and be difficult to bear.
Summary of the invention
If the position to all portable terminals positions and will cause the excessive problem of system overhead in the prior art in order to solve, the embodiment of the invention provides a kind of method of obtaining transport information by portable terminal.Described technical scheme is as follows:
The embodiment of the invention has proposed a kind ofly to obtain the method for transport information by portable terminal, comprising:
Step 1, network side transport information extraction server are randomly drawed the selected portable terminal of one or more portable terminals conducts in the belonging network;
Step 2, network side are surveyed the positional information of extracting selected portable terminal according to pre-set pattern.
Described preset rules is specially: position as selected portable terminal, then extract the positional information of portable terminal; Do not position as selected portable terminal, portable terminal that then extracts portable terminal and obtained and the signal time delay value between the base station, and the location database that inquiry is preset positions portable terminal;
Step 3, network side transport information are extracted the positional information that server extracts selected portable terminal continuously, and selected portable terminal is carried out Position Tracking
Step 4, network side transport information are extracted server and are obtained the transport information of this portable terminal region according to the situation of movement of the portable terminal of being followed the tracks of.
Preferred as technique scheme, described method can also comprise:
Step 5, at interval after a schedule time, stop tracking to described selected portable terminal; From other portable terminal, randomly draw one or more portable terminals as selected portable terminal, and selected portable terminal is carried out Position Tracking.
Preferred as technique scheme, in the described method, the method for randomly drawing portable terminal can be specially:
Step a, read the translational speed of described portable terminal, and select portable terminal in the fast classification as selected portable terminal according to preset rules is preferential.
Preferred as technique scheme, described step a can be specially:
Behind step a1, the t1 of every interval schedule time of portable terminal, with continuous the location b time of the schedule time of t2, according to the translational speed of b continuous positioning result calculating portable terminal; Localization method be portable terminal obtain and the base station between the signal time delay value, and the location database that presets of inquiry positions;
Step a2, portable terminal are back to network side with translational speed, and the network side transport information is extracted server and portable terminal classified by preset rules according to the translational speed of terminal:
Step a3, judge that whether the quantity of the portable terminal of current highest level satisfies required selected portable terminal number, if then enter step a4, otherwise enters step a5;
Step a4, the picked at random portable terminal is as selected portable terminal from the portable terminal of highest level, and step finishes;
Step a5, with all portable terminals in the current rank as selected portable terminal, and with next rank as current highest level, return step a3.
In this method, the portable terminal schedule time, t1 can be 20 minutes, and schedule time t2 can be for 2 seconds, located number of times b continuously and can be 5 times.The preset rules of portable terminal classification can be to be the highest level class more than the speed 30km/h, and speed 10km/h to 30km/h is second advanced other class, and speed 10km/h is following to be minimum rank class.
Preferred as technique scheme, described step a can also comprise:
At interval after the schedule time, judge and whether also have other not chosen portable terminals in the mobile terminal affiliated classification, if then finish to having the tracking of selected portable terminal now, from other portable terminal, randomly draw one or more portable terminals as selected portable terminal, and selected portable terminal is carried out Position Tracking; Otherwise continue to follow the tracks of existing selected portable terminal, in this classification, other-end is arranged.
Preferred as technique scheme, described step a can also comprise:
As selected portable terminal is portable terminal in other classification of lowermost level, then after schedule time at interval, judges whether the speed of selected portable terminal improves, if then continue to follow the tracks of this terminal; Otherwise finish tracking, from other portable terminal, randomly draw one or more portable terminals, and selected portable terminal is carried out Position Tracking as selected portable terminal to existing selected portable terminal.
The beneficial effect that the technical scheme that the embodiment of the invention provides is brought is: the patent No. that proposes by the present inventor is 200910090194.8, name is called disclosed mobile terminal positioning method in " localization method in a kind of mobile communication system and portable terminal, location-server ", by in a period of time repeatedly localisation of mobile terminals obtain the change in location of portable terminal, determining the translational speed of portable terminal, and determine the transport information of this area with this.Like this, can determine traffic by the transport information that portable terminal obtains.Certainly this part is not the invention main points that the present invention pays close attention to, and does not give unnecessary details at this.This mode need not increase hardware setting newly, and reduces the influence to terminal as far as possible.And have based on the real time traffic data acquisition mode of mobile phone location information that investment is little, sample size big, gather wide coverage and professional added value advantages of higher.It is the ideal mode of future transportation information extraction.China has 700,000,000 cellphone subscribers at present, be in the cellphone subscriber's sample size abundance in the urban road network, sample distribution and covering are desirable, combined high precision portable terminal location technology and electronic chart can be realized extraction, traffic differentiation and the trend prediction of Real-time Traffic Information, thereby the decision-making assistant information of traffic administrations such as traffic guidance and control is provided.
Description of drawings
Fig. 1 is the process flow diagram that portable terminal obtains the method for transport information that passes through that provides in the embodiment of the invention;
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, embodiment of the present invention is described further in detail below in conjunction with accompanying drawing.
Realizing needing to set up a location database before the embodiment of the invention, the proper vector of storing in the database is signal parameter information such as the signal time delay value, signal time delay difference between zones of different and the certain base station.This feature vectors storehouse discloses in Chinese patent 200910090194.8.The principle of this technology is: since between measured portable terminal of different geographic position portable terminals and base station the signal time delay value, signal parameter information differences such as signal time delay difference, if so terminal that a portable terminal is measured in different positions and a plurality of signal parameter information between different base station are as the reference value, and the location association at place stores when measuring, so when having portable terminal to locate again, as long as measure after the signal parameter information with as signal parameter information matches with reference to value, be the position of this portable terminal so with the positional information of the associated storage of the immediate signal parameter reference value of signal parameter information of measuring.
After having set up location database, can position portable terminal, and obtain transport information by locating information.
Embodiment
The preferred embodiment of the present invention proposes passes through the method that portable terminal obtains transport information, and its concrete grammar flow process comprises as shown in Figure 1:
Step 1, network side transport information extraction server are randomly drawed the selected portable terminal of one or more portable terminals conducts in the belonging network;
Step 2, network side are surveyed the positional information of extracting selected portable terminal according to pre-set pattern;
Described preset rules is specially: position as selected portable terminal, then extract the positional information of portable terminal; Do not position as selected portable terminal, portable terminal that then extracts portable terminal and obtained and the signal time delay value between the base station, and the location database that inquiry is preset positions portable terminal;
Step 3, network side transport information are extracted the positional information that server extracts selected portable terminal continuously, and selected portable terminal is carried out Position Tracking;
Step 4, network side transport information are extracted server and are obtained the transport information of this portable terminal region according to the situation of movement of the portable terminal of being followed the tracks of.Wherein situation of movement comprises moving direction, the translational speed of portable terminal.
The method that the embodiment of the invention proposes, portable terminal is randomly drawed, follow the tracks of with the selected portable terminal that is drawn into, judge the Real-time Traffic Information of portable terminal region according to the situation of movement (moving direction, translational speed) of the portable terminal of being followed the tracks of.This mode does not need portable terminal is increased new hardware module, has reduced the initial stage of traffic flow monitoring and has dropped into, and relied on accurate localization to finish extraction to transport information.
Preferably, the above embodiments can also comprise:
Step 5, at interval after a schedule time, stop tracking to described selected portable terminal; From other portable terminal, randomly draw one or more portable terminals as selected portable terminal, and selected portable terminal is carried out Position Tracking.
Be in order to prevent that same portable terminal from positioning for a long time, to cause the power consumption of portable terminal excessive like this.Therefore present embodiment for example per 15 minutes, extracts portable terminal as selected portable terminal again at preset time.
Preferably, in the step 1 of each above-mentioned embodiment, the method for randomly drawing portable terminal can be specially:
Step a, read the translational speed of described portable terminal, and select portable terminal in the fast classification as selected portable terminal according to preset rules is preferential.
When randomly drawing portable terminal, can adopt mode to extract as step a.Be accuracy and the real-time that detects for the magnitude of traffic flow in order to improve like this.For the extraction of transport information, the positional information that also only is in the mobile phone in the vehicle ' is valuable.All the other for example in the office positional information of actionless mobile phone etc. all transport information to be extracted be not have help.Motionless portable terminal can be removed like this, and choose the higher terminal of translational speed as selected portable terminal according to preset rules, the portable terminal that as far as possible will be in the motor vehicle is picked out as selected portable terminal.Can improve the accuracy when choosing terminal so as far as possible.
Preferably, described step a can be specially:
Behind step a1, the t1 of every interval schedule time of portable terminal, with continuous the location b time of the schedule time of t2, according to the translational speed of b continuous positioning result calculating portable terminal; Localization method be portable terminal obtain and the base station between the signal time delay value, and the location database that presets of inquiry positions;
Step a2, portable terminal are back to network side with translational speed, and the network side transport information is extracted server and portable terminal classified by preset rules according to the translational speed of terminal:
Step a3, judge that whether the quantity of the portable terminal of current highest level satisfies required selected portable terminal number, if then enter step a4, otherwise enters step a5;
Step a4, the picked at random portable terminal is as selected portable terminal from the portable terminal of highest level, and step finishes;
Step a5, with all portable terminals in the current rank as selected portable terminal, and with next rank as current highest level, return step a3.
In this method, the portable terminal schedule time, t1 can be 20 minutes, and schedule time t2 can be for 2 seconds, located number of times b continuously and can be 5 times.The preset rules of portable terminal classification can be to be the highest level class more than the speed 30km/h, and speed 10km/h to 30km/h is second advanced other class, and speed 10km/h is following to be minimum rank class.
In the above-mentioned steps, a kind of mode that adopts classification to select portable terminal has been proposed.Its classification foundation is from per terminal self translational speed that reported in 20 minutes of portable terminal.Because the speed envelope between pedestrian, cyclist, the motor vehicle is apparent in view.Translational speed to portable terminal is classified, and can as much as possiblely extract the portable terminal that is arranged in motor vehicle wherein, improves the accuracy when choosing terminal as far as possible.Certainly, those skilled in that art can understand, and no matter adopt which kind of mode to select or the conversion portable terminal, all must select in presumptive area.The portable terminal that exceeds presumptive area does not have influence to this regional transport information.
Preferably, described step a can also comprise:
At interval after the schedule time, judge and whether also have other not chosen portable terminals in the mobile terminal affiliated classification, if then finish to having the tracking of selected portable terminal now, from other portable terminal, randomly draw one or more portable terminals as selected portable terminal, and selected portable terminal is carried out Position Tracking; Otherwise continue to follow the tracks of existing selected portable terminal, in this classification, other-end is arranged.
This mode be for the portable terminal in as far as possible that translational speed is the high rank as selected portable terminal, prevent to reselect to low-level portable terminal by high level portable terminal, cause accuracy to fluctuate very big to the statistics of transport information.
Preferably, described step a can also comprise:
As selected portable terminal is portable terminal in the low-level classification, then after schedule time at interval, judges whether the speed of selected portable terminal improves, if then continue to follow the tracks of this terminal; Otherwise finish tracking, from other portable terminal, randomly draw one or more portable terminals, and selected portable terminal is carried out Position Tracking as selected portable terminal to existing selected portable terminal.
This mode is to use when high-level terminal is not enough in a certain zone, and this moment, the tracking section user of institute was minimum rank user, and causing the lower reason of its speed might be traffic factors such as traffic lights, also might be that the user is not on the vehicle.Following the tracks of this terminal after one schedule time.If the translational speed of this portable terminal never improves, illustrate that then this portable terminal may not be in the motor vehicle, therefore finish tracking to this portable terminal, select other portable terminals to follow the tracks of again at random.If a plurality of terminals of selecting at random in this location all remain low speed, then the traffic of decidable this area is in not smooth situation.
The present invention will be further described with a concrete example below.Now the mobile phone in the CDMA2000 network of areas of Beijing is that example describes.
Mobile phone is in certain zone, can detected mobile phone near three signal of base station travel-times be identical, according to this principle, mobile phone can be by detecting near the signal propagation time acquisition mobile phone more accurate positional information (error 20-30 rice) of three base stations to mobile phone.The CDMA2000 network can extract the detected mobile phone to three of a user mobile phone signal of base station travel-time, based on these three signal propagation time values, the position determining entity PDE of CDMA2000 network side (Position Determining Entity) calculates user position information, and the mobile phone location information that calculates in the position determining entity is passed to transport information and extracts in the server.To obtain positional information continuously 5 seconds interval time, calculate user's moving direction, speed and zone of living in the transport information extraction server, judge this regional traffic related information.
Beijing has cellphone subscriber 1,600 ten thousand now, after several years, user mobile phone will be changed gradually to 3G mobile, as one of big system of three among the 3G, the CDMA2000 handset of China Telecom will occupy sizable ratio, return its locating information as out-of-control all mobile phones that require, and then quantity of information is excessive, to make network can't bear load, cause that other business of user are affected in this network.And mobile phone its locating information of passback as not stopping also will make mobile phone power consumption increase greatly, make the user feel discontented.For example know one section on spring road (300 meters long), on this highway section and existing CDMA2000 user 500 people of periphery, the user who wherein really is positioned on this highway section driving vehicle is 25 people, and then having only the extraction of this 25 people's locating information is useful for the extraction of transport information.And in these 25 users, 7 people can satisfy the demand that transport information is extracted only to need to sample wherein.So can choose 7 people in this 25 people and follow the tracks of, all the other 18 people are as alternative user.There is the user to be reached 15 minutes by the Continuous Tracking time as this 7 philtrum, can no longer follows the tracks of this user, replace this user, to avoid making user's power consumption excessive this user's Continuous Tracking overlong time from remaining 18 alternative user's picked at random one people.
Therefore use the method in the preferred embodiment of the present invention, can be in the following way:
1, for the mobile phone that can independently position, can make mobile phone location 5 be continuously every 20 fens clock times with two seconds each speed, roughly calculate mobile phone speed,, be divided into the following (walking or static of 10km/h according to the difference of mobile phone movement velocity, the class C user), 10-30km/h (bicycle or low-speed cars, class B user), the above (automobile of 30km/h, the class A user) three kinds of user gradations, and measured value informed that by the CDMA2000 mobile communications network link transport information extracts server.
Mobile phone for no autonomous positioning function, upload continuously mobile phone to the three signal of base station travel-time that No. 5 times mobile phone records with two seconds every 20 fens clock time defensive position machines at every turn, determine user position information by the position determining entity among the CDMA2000, and this positional information informed that transport information extracts server, extract the travelling speed that server calculates this user by transport information.
2, transport information is extracted under the server record user's speed condition on current each highway section, selects the user to follow the tracks of, and preferentially when following the tracks of selects the class A user, is the class B user secondly, and worst is the class C user.
If 3 these sections do not have A level or class B user, the portion C level user who then extracts in this section follows the tracks of, as follows the tracks of and find after 10 minutes that this user still for the class C user, then stops the tracking to this user, randomly draw another user and follow the tracks of, reduce this user's mobile phone power consumption.
If 4 these sections have A level and class B user, can be divided into following two kinds of situations:
(1) A level and class B user count deficiency: follow the tracks of all A level and class B user this moment, and from this section, select portion C level user and follow the tracks of, do not change A level or class B user as this class C user within 10 minutes, then end tracking, randomly draw another user and follow the tracks of this user.
(2) A level and class B user's number are enough: select an amount of A level and class B user (the A level is preferentially selected) to follow the tracks of at random, be unlikely to excessive to guarantee the information transmission flow in the communication system.For tracked user, tracking time is reached 10 minutes user stop to follow the tracks of, replace by other not tracked A levels or class B user, to guarantee that the sole user can be not long-time excessively by Continuous Tracking, cause its power consumption excessive.Can be as not having other A levels or class B user for till replacing, then follow the tracks of this user can have other A levels or class B user to replace to the user region.
5,, when following the tracks of the user, require user's locating information to repay per 5 seconds once according to the demand of transport information extraction at present.
6, extract in the server in the transport information of network-side, in conjunction with electronic chart, the moving direction of terminal on road that acquisition is followed the tracks of, information such as translational speed are made judgement accurately to the transport information situation of corresponding area, finish obtaining of transport information.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. one kind is obtained the method for transport information by portable terminal, comprising:
Step 1, network side transport information extraction server are randomly drawed the selected portable terminal of one or more portable terminals conducts in the belonging network;
Step 2, network side are surveyed the positional information of extracting selected portable terminal according to pre-set pattern;
Described preset rules is specially: position as selected portable terminal, then extract the positional information of portable terminal; Do not position as selected portable terminal, portable terminal that then extracts portable terminal and obtained and the signal time delay value between the base station, and the location database that inquiry is preset positions portable terminal;
Step 3, network side transport information are extracted the positional information that server extracts selected portable terminal continuously, and selected portable terminal is carried out Position Tracking;
Step 4, network side transport information are extracted server and are obtained the transport information of this portable terminal region according to the situation of movement of the portable terminal of being followed the tracks of.
2. according to claim 1ly obtain the method for transport information, it is characterized in that described method can also comprise by portable terminal:
Step 5, at interval after a schedule time, the network side transport information is extracted server and is stopped tracking to described selected portable terminal; From other portable terminal, randomly draw one or more portable terminals as selected portable terminal, and selected portable terminal is carried out Position Tracking.
3. according to claim 1 and 2ly obtain the method for transport information, it is characterized in that in the described method, the method for randomly drawing portable terminal can be specially by portable terminal:
Step a, read the translational speed of described portable terminal, and select portable terminal in the fast classification as selected portable terminal according to preset rules is preferential.
4. according to claim 3ly obtain the method for transport information, it is characterized in that described step a is specially by portable terminal:
Behind step a1, the t1 of every interval schedule time of portable terminal, with continuous the location b time of the schedule time of t2, according to the translational speed of b continuous positioning result calculating portable terminal; Localization method be portable terminal obtain and the base station between the signal time delay value, and the location database that presets of inquiry positions;
Step a2, portable terminal are back to network side with translational speed, and the network side transport information is extracted server and portable terminal classified by preset rules according to the translational speed of terminal:
Step a3, judge that whether the quantity of the portable terminal of current highest level satisfies required selected portable terminal number, if then enter step a4, otherwise enters step a5;
Step a4, the picked at random portable terminal is as selected portable terminal from the portable terminal of highest level, and step finishes;
Step a5, with all portable terminals in the current rank as selected portable terminal, and with next rank as current highest level, return step a3.
5. according to claim 4ly obtain the method for transport information, it is characterized in that described step a also comprises by portable terminal:
At interval after the schedule time, judge and whether also have other not chosen portable terminals in the mobile terminal affiliated classification, if then finish to having the tracking of selected portable terminal now, from other portable terminal, randomly draw one or more portable terminals as selected portable terminal, and selected portable terminal is carried out Position Tracking; Otherwise continue to follow the tracks of existing selected portable terminal, in this classification, other-end is arranged.
6. according to claim 5ly obtain the method for transport information, it is characterized in that described step a also comprises by portable terminal:
As selected portable terminal is portable terminal in other classification of lowermost level, then after schedule time at interval, judges whether the speed of selected portable terminal improves, if then continue to follow the tracks of this terminal; Otherwise finish tracking, from other portable terminal, randomly draw one or more portable terminals, and selected portable terminal is carried out Position Tracking as selected portable terminal to existing selected portable terminal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200910241413 CN102081840B (en) | 2009-12-01 | 2009-12-01 | Method for acquiring traffic information through mobile terminals |
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| CN 200910241413 CN102081840B (en) | 2009-12-01 | 2009-12-01 | Method for acquiring traffic information through mobile terminals |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102523273A (en) * | 2011-12-08 | 2012-06-27 | 江苏紫荆花信息科技有限公司 | System for providing location-based service |
| CN103021163A (en) * | 2011-09-26 | 2013-04-03 | 联想移动通信科技有限公司 | Road condition state acquiring and sharing method and device and mobile communication equipment |
| CN103208189A (en) * | 2013-03-14 | 2013-07-17 | 华为技术有限公司 | Method and device for monitoring road traffic flow |
| CN103325247A (en) * | 2012-03-19 | 2013-09-25 | 中国移动通信集团辽宁有限公司 | Method and system for processing traffic information |
| CN103905991A (en) * | 2012-12-27 | 2014-07-02 | 中国移动通信集团公司 | Position information acquisition apparatus and method, and traffic status estimation system and method |
| CN104574971A (en) * | 2015-02-03 | 2015-04-29 | 上海奕行信息科技有限公司 | Road condition analysis method and system of expressway |
| CN105654745A (en) * | 2014-11-14 | 2016-06-08 | 常熟苏大低碳应用技术研究院有限公司 | Real-time traffic flow monitoring method based on intelligent handset |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1286331C (en) * | 2003-11-25 | 2006-11-22 | 大唐移动通信设备有限公司 | Network wireless environment based mobile communication positioning method |
| CN1333548C (en) * | 2004-05-10 | 2007-08-22 | 中国科学院计算技术研究所 | Method for implementing adjustment of automobile flowrate of city road traffic by using new communication technology |
| CN1897746A (en) * | 2005-07-15 | 2007-01-17 | 华为技术有限公司 | Terminal positioning method, mobile-terminal positioning system and mobile terminal |
| CN100555355C (en) * | 2006-08-29 | 2009-10-28 | 亿阳信通股份有限公司 | The method and system that the passage rate of road traffic calculates and mates |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103021163A (en) * | 2011-09-26 | 2013-04-03 | 联想移动通信科技有限公司 | Road condition state acquiring and sharing method and device and mobile communication equipment |
| CN102523273A (en) * | 2011-12-08 | 2012-06-27 | 江苏紫荆花信息科技有限公司 | System for providing location-based service |
| CN103325247A (en) * | 2012-03-19 | 2013-09-25 | 中国移动通信集团辽宁有限公司 | Method and system for processing traffic information |
| CN103325247B (en) * | 2012-03-19 | 2015-07-01 | 中国移动通信集团辽宁有限公司 | Method and system for processing traffic information |
| CN103905991A (en) * | 2012-12-27 | 2014-07-02 | 中国移动通信集团公司 | Position information acquisition apparatus and method, and traffic status estimation system and method |
| CN103905991B (en) * | 2012-12-27 | 2017-09-15 | 中国移动通信集团公司 | A kind of position information acquisition device, traffic estimating system and method |
| CN103208189A (en) * | 2013-03-14 | 2013-07-17 | 华为技术有限公司 | Method and device for monitoring road traffic flow |
| CN103208189B (en) * | 2013-03-14 | 2015-10-07 | 华为技术有限公司 | A kind of monitoring vehicle flow method and apparatus |
| CN105654745A (en) * | 2014-11-14 | 2016-06-08 | 常熟苏大低碳应用技术研究院有限公司 | Real-time traffic flow monitoring method based on intelligent handset |
| CN104574971A (en) * | 2015-02-03 | 2015-04-29 | 上海奕行信息科技有限公司 | Road condition analysis method and system of expressway |
| CN104574971B (en) * | 2015-02-03 | 2016-07-06 | 上海奕行信息科技有限公司 | A kind of road condition analyzing method of highway and the system of analysis |
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| CN102081840B (en) | 2013-04-24 |
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