CN102063788A - Method and system for releasing real-time road condition information - Google Patents
Method and system for releasing real-time road condition information Download PDFInfo
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- CN102063788A CN102063788A CN2009101941336A CN200910194133A CN102063788A CN 102063788 A CN102063788 A CN 102063788A CN 2009101941336 A CN2009101941336 A CN 2009101941336A CN 200910194133 A CN200910194133 A CN 200910194133A CN 102063788 A CN102063788 A CN 102063788A
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Abstract
The invention relates to the field of management of releasing of information on vehicle traffic navigation and road conditions, particularly a method and system for releasing real-time road condition information. The method for releasing real-time road condition information comprises the following steps: road sections of a road condition information provider are matched with road sections on a navigation electronic map; a road condition updating server regularly requests road condition information to the road condition information provider, updates the road condition information, and broadcasts to a road condition server through a local area network; a terminal requests road condition data to the road condition server; the road condition server carries out differential operation on latest road condition state cached by the road condition server currently according to old road condition state cached by the terminal, and distributes the operation result to the terminal; and the terminal recalculates the current road condition state, which is used for road condition display and navigation route calculation, according to the received information. The system for releasing real-time road condition information comprises a road condition information provider server, a road condition updating server and a network system composed of a plurality of road condition servers, route management servers and mobile terminals.
Description
Technical field
The present invention relates to vehicular traffic navigation and road conditions information releasing management domain, relate in particular to the method and the system thereof of real-time road condition information issue.
Background technology
Along with the increase with urban population of developing rapidly of China's economic, the traffic congestion of increasingly sharpening has become urban development and has been badly in need of one of critical problem that solves.One of most effectual way of utilizing modern information technologies solution urban traffic blocking is exactly the dynamic navigation service in conjunction with Real-time Traffic Information.Real-time dynamic information is joined navigation Service, navigation product can be selected for the user provides optimum trip circuit according to user's trip requirements and in conjunction with the real-time traffic situation of respective regions, to avoid the highway section that blocks up, the traffic load of balance urban road better.
The product that possesses the real-time road function of Chu Xianing in the market, great majority all are that the state of current road (as block up, jogging, unimpeded etc.) is showed on electronic chart with different color (as red, yellow, green etc.), allow the user select best driving path, dynamically traffic information is not dissolved into the driving path of selecting the best in the determinative of guidance path calculation automatically for the user according to these traffic informations; And the issue of traffic information is that the viewing area with the terminal current screen is a boundary, issues the information (comprising road condition, road circuit node etc.) of all roads in this zone, the data volume that this method issues is big, it is long that road conditions are downloaded time-delay, particularly when moving graphic operation, sluggish apparent in view.
Summary of the invention
In order to overcome the problem and shortage of above-mentioned existence, the purpose of this invention is to provide a kind of real-time road condition information dissemination method based on area update and difference update technology, this method can reduce the data volume that issues traffic information, is convenient to terminal again and when guidance path calculates the road conditions factor is taken into account.
Technical scheme of the present invention is:
The method of the real-time road condition information issue that the present invention proposes mainly may further comprise the steps:
Step a. road condition updating server is done coupling with the highway section of traffic information provider and the highway section of map of navigation electronic;
Step b. road condition updating server regularly behind traffic information provider server requests traffic information, upgrade road conditions and by LAN (Local Area Network) to the road conditions server broadcast;
The step c terminal is to road conditions server requests road condition data, the road conditions server is made calculus of differences according to the old road condition of terminal buffers and the up-to-date road condition of current road conditions server buffer, and operation result is handed down to terminal, terminal is according to the information that receives, recalculate current road condition, to show as road conditions and the guidance path calculation.
Further detailed, described step a is:
Step a1: extract a highway section A from the highway section coding schedule of traffic information provider, the highway section has directivity, is forward from west to east, from south to north;
Step a2: the starting point with highway section A is a reference point, chooses a highway section B1 from map of navigation electronic, and highway section B1 must satisfy: (1) reference point is no more than certain threshold value to the bee-line of highway section B1; (2) angular separation of highway section A and highway section B1 is less than preset value, and this angle is all littler than the angle of other highway sections of not mating and highway section A, if can not find qualified highway section B1, it fails to match for highway section A, gets back to the coupling that step a1 continues next highway section;
Step a3: begin next bar highway section B2 that search is adjacent map of navigation electronic from highway section B1, highway section B2 must satisfy: the terminal point of (1) highway section B1 is the starting point of highway section B2; (2) direction of highway section B2 is consistent with the direction of highway section B1, and the angular separation is between-90 ° and 90 °; (3) highway section B2 is littler than the angular separation of other adjacent highway sections of not mating and highway section B1 with the angular separation of highway section B1, if do not find qualified highway section B2, gets back to step a2 and restarts coupling;
Step a4: begin repeating step a3 from highway section B2, seek highway section with highway section B2 adjacency, so repeatedly, satisfy up to following condition: (1) searches out highway section Bn, the terminal point of highway section A arrives the bee-line in this highway section less than certain threshold value, and promptly highway section Bn is the highway section of mating with highway section A to all highway sections the Bn of highway section from highway section B1 near the terminal point of highway section A, the match is successful for highway section A, gets back to step a1 and continue; (2) traverse the highway section that highway section Bm does not find eligible (1), end coupling work, it fails to match for highway section A, gets back to step a1 and continue, and wherein the m of highway section Bm is certain threshold value;
Step a5: after coupling had all been done in all highway sections in the highway section coding schedule of traffic information provider, whole coupling end-of-job finally obtained a highway section matching list.
Further, the preset value of the angular separation of highway section A among the described step a2 and highway section B1 is 60 °.The threshold value of deciding of the m of highway section Bm among the described step a4 is set to 100, and the span of the n of highway section Bn is between 1≤n≤m.
Further detailed, described step b is: the road condition updating server is to be unit with the zone when traffic information provider server requests traffic information, once only ask the traffic information in single zone, after upgrading road conditions by LAN (Local Area Network) to the road conditions server broadcast.
Further detailed, described step b is:
Step b1: the road condition updating server is periodically to the traffic information in the zone of server requests of traffic information provider;
Step b2: the road condition updating server is resolved the information that request obtains according to the highway section matching list, and the highway section of traffic information provider coding is mapped to the highway section coding of map of navigation electronic, and generates a state and number identify this road condition updating;
Step b3: the traffic information after will resolving by LAN (Local Area Network) to the road conditions server broadcast, after the road conditions server is received broadcast data, with this traffic information buffer memory;
Step b4: repeating step b1 is to step b3, and road conditions are periodically upgraded in the zone one by one.
Further again, the zone among the described step b1 is dividing unit with the city for small and medium cities, is dividing unit with the district for large size city.State among the described step b2 number is a unique state number within a certain period of time.
Further detailed, described step c is: terminal is unit with the zone to road conditions server requests road condition data, once only ask the traffic information in single zone, the road conditions server is made calculus of differences according to the old road condition of terminal buffers and the up-to-date road condition of current road conditions server buffer, and the mechanism that adopts paging to issue, grade is handed down to terminal earlier than the traffic information in higher highway section, terminal is according to the information that receives, recalculate current road condition, to show as road conditions and the guidance path calculation.
Further detailed, described step c is:
Step c1: terminal sends the road condition updating request package to the road conditions server, the longitude and latitude P that comprises the terminal display central point in the request package, preceding regional code Co that once issues and road condition So are if request first, regional code and road condition number are changed to particular value, to show difference;
Step c2: the road conditions server calculates the zone at this central point place according to longitude and latitude P, and obtains this regional regional code Cn;
Step c3: if current regional code Cn is inconsistent with regional code Co before, issue the complete traffic information of current region to terminal, promptly state is the road section information that blocks up or walk or drive slowly, and comprises highway section node, highway section coding, and the highway section state, the state of issuing not is unimpeded road section information;
Step c4: if current regional code Cn is consistent with regional code Co before, to the difference information of terminal transmission with respect to road conditions last time;
Step c5: terminal goes out the current highway section that gets congestion or walk or drive slowly according to increment and non-increment property calculation after receiving the traffic information that the road conditions server issues;
Step c6: when terminal shows at map, the highway section that blocks up or walk or drive slowly is plotted on other map objects with different color stacks, shows real-time road condition information intuitively;
Step c7: terminal is composed with different weighted values the highway section that blocks up or walk or drive slowly when calculating guidance path, carries out dynamic programming path.
Further again, the difference information among the described step c2 is the information that the highway section increases newly, deletes and change, and the highway section for newly-increased must issue nodal information, and for the highway section of deleting and changing, needn't issue nodal information.
At above-mentioned real-time road condition information dissemination method, the system of a kind of real-time road condition information issue of proposition of the present invention comprises:
A traffic information provider server, and by Internet connection to the road condition updating server;
A road condition updating server is connected to a plurality of road conditions servers by Internet connection to above-mentioned traffic information provider server and by LAN (Local Area Network);
A plurality of road conditions servers are connected to above-mentioned road condition updating server (20) by LAN (Local Area Network), and are connected to a routing management server;
A routing management server is connected to above-mentioned a plurality of road conditions servers, and sets up communication by wireless network and portable terminal and be connected.
Portable terminal is set up communication by wireless network with above-mentioned routing management server and is connected.
The present invention adopts technical scheme as above, a kind of real-time road condition information dissemination method based on area update and difference update technology is provided, can reduce the data volume that issues traffic information, being convenient to terminal again and when guidance path calculates the road conditions factor being taken into account, is a kind of vehicular traffic navigation of Practical Intelligent type and road conditions administrative skill of being suitable for.
Description of drawings
Fig. 1 is the process flow diagram of the method for real-time road condition information issue of the present invention;
Fig. 2 is the synoptic diagram of the system of real-time road condition information issue of the present invention.
Embodiment
Now the present invention is further described with embodiment in conjunction with the accompanying drawings.
Consult shown in Figure 1, the method for a kind of real-time road condition information issue of the present invention, key step is to comprise:
Step 101:a. road condition updating server is done coupling with the highway section of traffic information provider and the highway section of map of navigation electronic.
Step 102:b. road condition updating server regularly behind traffic information provider server requests traffic information, upgrade road conditions and by LAN (Local Area Network) to the road conditions server broadcast;
Step 103:c. terminal is to road conditions server requests road condition data, the road conditions server is made calculus of differences according to the old road condition of terminal buffers and the up-to-date road condition of current road conditions server buffer, and operation result is handed down to terminal, terminal is according to the information that receives, recalculate current road condition, to show as road conditions and the guidance path calculation.
Detailed, described step 101 further is:
Step a1: extract a highway section A from the highway section coding schedule of traffic information provider, the highway section has directivity, is forward from west to east, from south to north.
Step a2: the starting point with highway section A is a reference point, chooses a highway section B1 from map of navigation electronic, and highway section B1 must satisfy: 1) reference point is no more than certain threshold value to the bee-line of highway section B1, guarantees that promptly highway section B1 is near reference point; 2) angular separation of highway section A and highway section B1 is all littler than the angle of other highway sections of not mating and highway section A less than predetermined value (as 60 degree) and this angle.If can not find qualified highway section B1, it fails to match for highway section A, gets back to the coupling that step a1 continues next highway section.
Step a3: begin next bar highway section B2 that search is adjacent map of navigation electronic from highway section B1, highway section B2 must satisfy: 1) terminal point of highway section B1 is the starting point of highway section B2; 2) direction of highway section B2 is consistent with the direction of highway section B1, and promptly the angular separation is between-90 ° and 90 °; 3) highway section B2 is littler than the angular separation of other adjacent highway sections of not mating and highway section B1 with the angular separation of highway section B1.If do not find qualified highway section B2, get back to step a2 and restart coupling.
Step a4: begin repeating step a3 from highway section B2, seek highway section with highway section B2 adjacency, so repeatedly, satisfy up to following condition: 1) search out highway section Bn, the terminal point of highway section A arrives the bee-line in this highway section less than certain threshold value, be highway section Bn near the terminal point of highway section A, to all highway sections highway section Bn all be highway section with highway section A coupling from highway section B1 this moment.So far, the match is successful for highway section A, gets back to step a1 and continue.2) traverse highway section Bm (m is certain threshold value, as 100) and all do not find eligible 1) the highway section, in order to stop unconfined traversal, end coupling work, it fails to match for highway section A, gets back to step a1 and continue.
Step a5: after coupling had all been done in all highway sections in the highway section coding schedule of traffic information provider, whole coupling end-of-job finally obtained a highway section matching list.
Detailed, described step 102 further is:
The road condition updating server is to be unit with the zone when traffic information provider server requests traffic information, once only asks the traffic information in single zone, upgrade after the road conditions again and by LAN (Local Area Network) to the road conditions server broadcast.Specific as follows:
Step b1: the road condition updating server is periodically to the traffic information in the zone of server requests of traffic information provider.
Step b2: the road condition updating server is resolved the information that request obtains according to the highway section matching list, the highway section of traffic information provider coding is mapped to the highway section coding of map of navigation electronic, and generates a state number (unique within a certain period of time) and identify this road condition updating.
Step b3: the traffic information after will resolving by LAN (Local Area Network) to the road conditions server broadcast.After the road conditions server is received broadcast data, with this traffic information buffer memory.
Step b4: repeating step b1～step b3, by periodically upgrading road conditions in the city.
Detailed, described step 103 further is:
Described step c further is: terminal is unit with the zone to road conditions server requests road condition data, once only ask the traffic information in single zone, the road conditions server is made calculus of differences according to the old road condition of terminal buffers and the up-to-date road condition of current road conditions server buffer, and the mechanism that adopts paging to issue, the data volume that the restriction single page issues, grade is handed down to terminal earlier than the traffic information in higher highway section, terminal is according to the information that receives, recalculate current road condition, to show as road conditions and the guidance path calculation.Specific as follows:
Step c1: terminal sends the road condition updating request package to the road conditions server, comprises the longitude and latitude P of terminal display central point in the request package, preceding regional code Co that once issues and road condition So.If request first, regional code and road condition number are changed to particular value, to show difference.
Step c2: the road conditions server calculates the zone at this central point place according to longitude and latitude P, and obtains this regional regional code Cn.
Step c3: if current regional code Cn is inconsistent with regional code Co before, twice center takes place trans-regional before and after illustrating, therefore must issue the complete traffic information (being non-incremental data) of current region to terminal, be that state is the road section information that blocks up or walk or drive slowly, comprise highway section node, highway section coding, and the highway section state etc.For state is that unimpeded road section information just no longer issues, because the state of terminal acquiescence road is unimpeded, helps reducing the data volume that issues like this.
Step c4: if current regional code Cn is consistent with regional code Co before, twice center is at the same area before and after illustrating, this moment is as long as send difference information (being incremental data) with respect to road conditions last time to terminal, i.e. information such as newly-increased, deletion in highway section and change.Highway section for newly-increased must issue nodal information, and for the highway section of deleting and changing, needn't issue nodal information, has so just significantly reduced the data volume that issues.
Step c5: terminal goes out the current highway section that gets congestion or walk or drive slowly according to increment and non-increment property calculation after receiving the traffic information that the road conditions server issues.
Step c6: when terminal shows at map, the highway section that blocks up or walk or drive slowly is plotted on other map objects with different color stacks, can shows real-time road condition information intuitively.
Step c7: terminal is composed with different weighted values the highway section that blocks up or walk or drive slowly when calculating guidance path, so just can reach the purpose of dynamic programming path.
Consult shown in Figure 2ly, the system of a kind of real-time road condition information issue of the present invention comprises:
Traffic information provider server 10, and by Internet connection to road condition updating server 20;
Road condition updating server 20, by Internet connection to above-mentioned traffic information provider server 10 and be communicated with LAN (Local Area Network) be connected to a plurality of road conditions servers 301,302 ..., 30n;
A plurality of road conditions servers 301,302 ..., 30n, be connected to above-mentioned road condition updating server 20 by LAN (Local Area Network), and be connected to a routing management server 40;
Although specifically show and introduced the present invention in conjunction with preferred embodiment; but the those skilled in the art should be understood that; in the spirit and scope of the present invention that do not break away from appended claims and limited; can make various variations to the present invention in the form and details, be protection scope of the present invention.
Claims (10)
1. the method for a real-time road condition information issue is characterized in that, comprising:
Step a. road condition updating server is done coupling with the highway section of traffic information provider and the highway section of map of navigation electronic;
Step b. road condition updating server regularly behind traffic information provider server requests traffic information, upgrade road conditions and by LAN (Local Area Network) to the road conditions server broadcast;
The step c terminal is to road conditions server requests road condition data, the road conditions server is made calculus of differences according to the old road condition of terminal buffers and the up-to-date road condition of current road conditions server buffer, and operation result is handed down to terminal, terminal is according to the information that receives, recalculate current road condition, to show as road conditions and the guidance path calculation.
2. the method for real-time road condition information issue according to claim 1 is characterized in that described step a further is:
Step a1: extract a highway section A from the highway section coding schedule of traffic information provider, the highway section has directivity, is forward from west to east, from south to north;
Step a2: the starting point with highway section A is a reference point, chooses a highway section B1 from map of navigation electronic, and highway section B1 must satisfy: (1) reference point is no more than certain threshold value to the bee-line of highway section B1; (2) angular separation of highway section A and highway section B1 is less than predetermined value, and this angle is all littler than the angle of other highway sections of not mating and highway section A, if can not find qualified highway section B1, it fails to match for highway section A, gets back to the coupling that step a1 continues next highway section;
Step a3: begin next bar highway section B2 that search is adjacent map of navigation electronic from highway section B1, highway section B2 must satisfy: the terminal point of (1) highway section B1 is the starting point of highway section B2; (2) direction of highway section B2 is consistent with the direction of highway section B1, and the angular separation is between-90 ° and 90 °; (3) highway section B2 is littler than the angular separation of other adjacent highway sections of not mating and highway section B1 with the angular separation of highway section B1, if do not find qualified highway section B2, gets back to step a2 and restarts coupling;
Step a4: begin repeating step a3 from highway section B2, seek highway section with highway section B2 adjacency, so repeatedly, satisfy up to following condition: (1) searches out highway section Bn, the terminal point of highway section A arrives the bee-line in this highway section less than certain threshold value, and promptly highway section Bn is the highway section of mating with highway section A to all highway sections the Bn of highway section from highway section B1 near the terminal point of highway section A, the match is successful for highway section A, gets back to step a1 and continue; (2) traverse the highway section that highway section Bm does not find eligible (1), end coupling work, it fails to match for highway section A, gets back to step a1 and continue, and wherein the m of highway section Bm is certain threshold value;
Step a5: after coupling had all been done in all highway sections in the highway section coding schedule of traffic information provider, whole coupling end-of-job finally obtained a highway section matching list.
3. the method for real-time road condition information issue according to claim 2, it is characterized in that: the definite value of highway section A among the described step a2 and the angular separation of highway section B1 is set to 60 °.
4. the method for real-time road condition information issue according to claim 2, it is characterized in that: the threshold value of deciding of the m of the highway section Bm among the described step a4 is set to 100, and the span of the n of highway section Bn is between 1≤n≤m.
5. the method for real-time road condition information issue according to claim 1, it is characterized in that, described step b further is: the road condition updating server is to be unit with the zone when traffic information provider server requests traffic information, once only ask the traffic information in single zone, upgrade after the road conditions again and by LAN (Local Area Network) to the road conditions server broadcast.
6. the method for real-time road condition information issue according to claim 5 is characterized in that described step b further is:
Step b1: the road condition updating server is periodically to the traffic information in the zone of server requests of traffic information provider;
Step b2: the road condition updating server is resolved the information that request obtains according to the highway section matching list, the highway section coding of traffic information provider is mapped to the highway section coding of map of navigation electronic, and generate a state and number identify this road condition updating, described state number is a unique state number within a certain period of time;
Step b3: the traffic information after will resolving by LAN (Local Area Network) to the road conditions server broadcast, after the road conditions server is received broadcast data, with this traffic information buffer memory;
Step b4: repeating step b1 upgrades road conditions to step b3.
7. the method for real-time road condition information issue according to claim 1, it is characterized in that, described step c further is: terminal is unit with the zone to road conditions server requests road condition data, once only ask the traffic information in single zone, the road conditions server is made calculus of differences according to the old road condition of terminal buffers and the up-to-date road condition of current road conditions server buffer, and the mechanism that adopts paging to issue, grade is handed down to terminal earlier than the traffic information in higher highway section, terminal is according to the information that receives, recalculate current road condition, to show as road conditions and the guidance path calculation.
8. the method for real-time road condition information issue according to claim 7 is characterized in that described step c further is:
Step c1: terminal sends the road condition updating request package to the road conditions server, the longitude and latitude P that comprises the terminal display central point in the request package, preceding regional code Co that once issues and road condition So are if request first, regional code and road condition number are changed to particular value, to show difference;
Step c2: the road conditions server calculates the zone at this central point place according to longitude and latitude P, and obtains this regional regional code Cn;
Step c3: if current regional code Cn is inconsistent with regional code Co before, issue the complete traffic information of current region to terminal, promptly state is the road section information that blocks up or walk or drive slowly, and comprises highway section node, highway section coding, and the highway section state, the state of issuing not is unimpeded road section information;
Step c4: if current regional code Cn is consistent with regional code Co before, to the difference information of terminal transmission with respect to road conditions last time;
Step c5: terminal goes out the current highway section that gets congestion or walk or drive slowly according to increment and non-increment property calculation after receiving the traffic information that the road conditions server issues;
Step c6: when terminal shows at map, the highway section that blocks up or walk or drive slowly is plotted on other map objects with different color stacks, shows real-time road condition information intuitively;
Step c7: terminal is composed with different weighted values the highway section that blocks up or walk or drive slowly when calculating guidance path, carries out dynamic programming path.
9. the method for real-time road condition information issue according to claim 8, it is characterized in that: the difference information among the described step c2 is the information that the highway section is newly-increased, delete and change, for newly-increased highway section, must issue nodal information, and, needn't issue nodal information for the highway section of deleting and changing.
10. the system of a real-time road condition information issue is characterized in that, comprising:
A traffic information provider server (10), and by Internet connection to road condition updating server (20);
A road condition updating server (20), by Internet connection to above-mentioned traffic information provider server (10) and by LAN (Local Area Network) be connected to a plurality of road conditions servers (301,302 ..., 30n);
A plurality of road conditions servers (301,302 ..., 30n), be connected to above-mentioned road condition updating server (20) by LAN (Local Area Network), and be connected to a routing management server (40);
A routing management server (40), be connected to above-mentioned a plurality of road conditions servers (301,302 ..., 30n), and set up communication by wireless network with portable terminal (50) and be connected.
Portable terminal (50) is set up communication by wireless network with above-mentioned routing management server (40) and is connected.
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