CN101404548A - Traffic information broadcast issuing method, apparatus and system based on intelligent traffic system - Google Patents
Traffic information broadcast issuing method, apparatus and system based on intelligent traffic system Download PDFInfo
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- CN101404548A CN101404548A CNA2008102250947A CN200810225094A CN101404548A CN 101404548 A CN101404548 A CN 101404548A CN A2008102250947 A CNA2008102250947 A CN A2008102250947A CN 200810225094 A CN200810225094 A CN 200810225094A CN 101404548 A CN101404548 A CN 101404548A
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Abstract
The invention discloses a method for issuing a traffic information broadcast based on an intelligent traffic system, a device and a system thereof, and belongs to the field of traffic information channel services. The method adopts different issuing strategies according to different traffic conditions, adopts the combination of a fully-issuing strategy and a jam strategy in a traffic jam, and adopts the combination of the fully-issuing strategy and an updating strategy in a smooth traffic. The method causes the updating of the traffic information to be timelier and the coverage area of the traffic information to be broader, thus users can receive the traffic information which has a boarder coverage area and is updated more timely, and the issuing quality is promoted to be improved.
Description
Technical field
The present invention relates to the Traffic Message Channel service field, relate in particular to a kind of traffic information broadcast issuing method, device and system based on intelligent transportation system.
Background technology
RDS (Radio Data System, radio data system)-TMC (Traffic Message Channel, Traffic Message Channel) the Traffic Message Channel service is based on intelligent transportation system (IntelligentTransportati on System, a kind of dynamic information service ITS).Traffic Message Channel service, can with the form of electronic chart will be in real time, integrate and personalized information offers vehicle-mounted receiver device.
The RDS-TMC technology is to utilize FM frequency modulated subcarrier (RDS) to come broadcast traffic information message, its target is to serve by RDS-TMC, can " voicelessly " accurate, real-time with relevant information be passed to the user, and not need to interrupt the program of radio station that the user is listening to.
The RDS-TMC system architecture as shown in Figure 1, this system is by traffic information center TIC (TrafficInformation Center), broadcasting office (Broadcasting House), dispatching station (Transmitterstation) and four most of compositions of vehicle-mounted receiver device.Traffic information center is responsible for the collection and the processing of dynamic information, and broadcasting office is encoded the dynamic information data, and dispatching station coded data utilizes broadcast transmission, and vehicle-mounted receiver device receives the Real-time Traffic Information that dispatching station sends.
The RDS-TMC data are made up of three parts: location point numbering, traffic state information code, events affecting direction (being called for short " tlv triple ").
The location point numbering: road network is made of several location points, and each location point is represented an actual traffic position, and unique location point numbering is arranged, in order to distinguish different location points.The scope of location point numbering is 0～65535.
The traffic state information code: the coding of traffic events, different event code is represented different traffic events.
Traffic behavior flow information code table is as follows:
| Traffic state information code (Code) | Velocity interval (the speed km/hour) | |
| 1 | 101 | 0～20 |
| 2 | 108 | 20～40 |
| 3 | 115 | 40～60 |
| 4 | 122 | 60～80 |
| 5 | 124 | ＞＝80 |
Traffic event information direction: be meant that the road direction that the back is influenced takes place traffic events.
The traffic event information direction is defined as follows:
| Events affecting direction (direction) | Describe | |
| 1 | + | Positive direction: from West to East, from south orientation north, clockwise |
| 2 | - | Negative direction: from the east orientation west, from north orientation south, counterclockwise |
Just be enough to represent transport information in the geographic area by tlv triple.Prior art is data in the update cycle, transport information all in the geographic area is sent to vehicle-mounted receiver device indiscriminately, because RDS-TMC shared bandwidth in broadcast channel is narrower, there is restriction in the data traffic volume, therefore when the data volume of dynamic information is very huge, be difficult in data in the update cycle, the transport information that all are useful sends to the user, causes some important transport information can not send to the user timely.
Summary of the invention
For many as far as possible and important TMC transport information can being sent to vehicle-mounted receiver device, the present invention by the following technical solutions:
On the one hand, the invention provides a kind of traffic information broadcast issuing method based on intelligent transportation system.
A kind of traffic information broadcast issuing method based on intelligent transportation system comprises:
The setting proportion threshold value of blocking up;
Obtain the ratio of blocking up;
Judge whether the ratio of blocking up surpasses above-mentioned threshold value, if the ratio of blocking up, adopts complete the send out strategy and tactful the combining of blocking up above above-mentioned threshold value; If the ratio of blocking up is no more than above-mentioned threshold value, complete strategy of employing combines with update strategy.
On the one hand, the invention provides a kind of traffic information broadcasting distributing device based on intelligent transportation system.
A kind of traffic information broadcasting distributing device based on intelligent transportation system comprises:
Module is set, is used for setting the proportion threshold value of blocking up;
The information acquisition module is used to obtain the ratio of blocking up;
Control module is used for judging whether the ratio of blocking up surpasses above-mentioned threshold value, if the ratio of blocking up, adopts complete the send out strategy and tactful the combining of blocking up above above-mentioned threshold value; If the ratio of blocking up is no more than above-mentioned threshold value, complete strategy of employing combines with update strategy.
On the other hand, the invention provides a kind of traffic information broadcasting delivery system based on intelligent transportation system.
A kind of traffic information broadcasting delivery system based on intelligent transportation system comprises traffic information center, traffic information broadcasting distributing device, broadcasting office, dispatching station and vehicle-mounted receiver device, and described traffic information broadcasting distributing device comprises:
Module is set, is used for setting the proportion threshold value of blocking up;
The information acquisition module is used to obtain the ratio of blocking up;
Control module is used for judging whether the ratio of blocking up surpasses above-mentioned threshold value, if the ratio of blocking up, adopts complete the send out strategy and tactful the combining of blocking up above above-mentioned threshold value; If the ratio of blocking up is no more than above-mentioned threshold value, complete strategy of employing combines with update strategy.
The present invention adopts a kind of new TMC traffic information broadcast issuing method, adopts different publishing policies according to different traffics.When blocking up, adopt complete the send out strategy and tactful the combining of blocking up; When not blocking up, complete strategy of employing combines with update strategy.Make transport information renewal more in time, the coverage of transport information is more extensive, and is wider thereby the user can receive coverage rate, upgrades transport information more timely, impelled the raising of issue quality.
Description of drawings
Fig. 1 is a Traffic Message Channel service system configuration diagram in the prior art;
Fig. 2 is traffic information broadcast issuing method flow chart described in the present invention;
Fig. 3 is traffic information broadcasting distributing device block diagram described in the present invention;
Fig. 4 is traffic information broadcasting delivery system block diagram described in the present invention.
Embodiment
For many as far as possible and important TMC transport information being sent to vehicle-mounted receiver device, the invention provides a kind of traffic information broadcast issuing method based on intelligent transportation system.
As shown in Figure 2, this method comprises:
201, set the proportion threshold value of blocking up.
At first will set the proportion threshold value of blocking up, be that thresholding is judged current traffic with this threshold value.
202, obtain the ratio of blocking up.
After traffic information center collected dynamic information, the traffic information broadcasting distributing device can be judged the traffic that current geographic area (referring generally to entire city) is interior by the transport information that collects, and obtains the ratio of blocking up in the current geographic area.
203, judge whether the ratio of blocking up surpasses above-mentioned threshold value, if the ratio of blocking up, adopts complete the send out strategy and tactful the combining of blocking up above above-mentioned threshold value; If the ratio of blocking up is no more than above-mentioned threshold value, complete strategy of employing combines with update strategy.
If the ratio of blocking up that obtains has surpassed the proportion threshold value of blocking up of setting, judge that current geographic area is in congestion status, carry out complete the send out strategy and tactful the combining of blocking up so.The strategy that blocks up is meant data in the update cycle, to Vehicle Speed 20 kms/hour below the transport information (congestion information) in highway section send; A full strategy is meant data and in the update cycle, all transport information is sent one by one that whole transport information is made up of congestion information and non-congestion information.
The full strategy of sending out is exactly in the update cycle, preferentially to send congestion information data with tactful the combining of blocking up, and sends non-congestion information (transport information except that congestion information) again after sending congestion information.When the geographic area was in congestion status, the data volume of transport information was very huge, at this moment was difficult to all transport information are sent to the user data in the update cycle, so will preferentially send important relatively transport information.Blocking up during proportion threshold value that the congestion in road degree surpass to be set, adopt the strategy that blocks up earlier, to Vehicle Speed 20 kms/time below the transport information in highway section send, non-congestion information wouldn't send, thereby reduces the transmission of data volume.After sending congestion information, adopt the full strategy of sending out, remaining non-congestion information is sent.So just many as far as possible and important transport information can be sent to vehicle-mounted receiver device.
If the proportion threshold value of blocking up that the ratio of blocking up that obtains surpass to be set judges that current geographic area is in non-congestion status, carry out complete the combining of strategy and update strategy of sending out so.Update strategy is meant data in the update cycle that the transport information in the cycle compares with a transport information and a last Data Update, and the transport information that changes is sent, and the transport information that does not change no longer sends; A full strategy is meant data and in the update cycle, all transport information is sent one by one.
The full strategy of sending out is exactly in the update cycle, preferentially to send lastest imformation data with combining of update strategy, sends non-lastest imformation (transport information except that lastest imformation) again after sending lastest imformation.When the geographic area was in non-congestion status, the front and back data variation rate of twice Data Update between the cycle maintained between 30%～35% substantially, and within 5 minutes, traffic obvious change can not take place.Therefore, under the situation that most of road condition data does not change, will save limited bandwidth resources greatly, send up-to-date traffic information more rapidly if only send more new data.Update strategy be with current data in the update cycle the real-time road data and last data in the update cycle the real-time road data compare, comparison procedure is, see in the tlv triple in the data file, whether the traffic behavior code of corresponding speed changes, vicissitudinous data are sent, do not change traffic state information no longer repeat send, to reach the purpose of conserve bandwidth.After executing update strategy, carry out the full strategy of sending out, be exactly in the time that current data was left in the update cycle, send remaining non-lastest imformation to vehicle-mounted receiver device.So just can in the update cycle many as far as possible and important transport information be sent to vehicle-mounted receiver device data.
The traffic information broadcasting distributing device passes to broadcasting office according to different strategies with various transport information, and broadcasting office is encoded to traffic information data, and the data utilization after dispatching station will encode broadcasts to vehicle-mounted receiver device.
The present invention adopts a kind of new traffic information broadcast issuing method, adopts different publishing policies according to different traffics, and issue mechanism is more versatile and flexible.When blocking up, adopt complete the send out strategy and tactful the combining of blocking up; When not blocking up, complete strategy of employing combines with update strategy.Make that the renewal of transport information is more timely; The data volume of issue is bigger, thereby can cover more road, has improved the data coverage rate, and the coverage of transport information is more extensive.It is wider that the user can receive coverage rate, upgrades transport information more timely, impelled the raising of issue quality.
The invention provides a kind of traffic information broadcasting distributing device based on intelligent transportation system.
As shown in Figure 3, this device comprises:
At first will set the proportion threshold value of blocking up, be that thresholding is judged current traffic with this threshold value.
After traffic information center collects dynamic information, the information acquisition module of traffic information broadcasting distributing device can be judged the traffic that current geographic area (referring generally to entire city) is interior by the transport information that collects, and obtains the ratio of blocking up in the current geographic area.
If the ratio of blocking up that obtains has surpassed the proportion threshold value of blocking up of setting, judge that current geographic area is in congestion status, carry out complete the send out strategy and tactful the combining of blocking up so.The strategy that blocks up is meant data in the update cycle, to Vehicle Speed 20 kms/hour below the transport information (congestion information) in highway section send; A full strategy is meant data and in the update cycle, all transport information is sent one by one that whole transport information is made up of congestion information and non-congestion information.
The full strategy of sending out is exactly in the update cycle, preferentially to send congestion information data with tactful the combining of blocking up, and sends non-congestion information (transport information except that congestion information) again after sending congestion information.When the geographic area was in congestion status, the data volume of transport information was very huge, at this moment was difficult to all transport information are sent to the user data in the update cycle, so will preferentially send important relatively transport information.Blocking up during proportion threshold value that the congestion in road degree surpass to be set, adopt the strategy that blocks up earlier, to Vehicle Speed 20 kms/time below the transport information in highway section send, non-congestion information wouldn't send, thereby reduces the transmission of data volume.After sending congestion information, adopt the full strategy of sending out, remaining non-congestion information is sent.So just many as far as possible and important transport information can be sent to vehicle-mounted receiver device.
If the proportion threshold value of blocking up that the ratio of blocking up that obtains surpass to be set judges that current geographic area is in non-congestion status, carry out complete the combining of strategy and update strategy of sending out so.Update strategy is meant data in the update cycle that the transport information in the cycle compares with a transport information and a last Data Update, and the transport information that changes is sent, and the transport information that does not change no longer sends; A full strategy is meant data and in the update cycle, all transport information is sent one by one.
The full strategy of sending out is exactly in the update cycle, preferentially to send lastest imformation data with combining of update strategy, sends non-lastest imformation (transport information except that lastest imformation) again after sending lastest imformation.When the geographic area was in non-congestion status, the front and back data variation rate of twice Data Update between the cycle maintained between 30%～35% substantially, and within 5 minutes, traffic obvious change can not take place.Therefore, under the situation that most of road condition data does not change, will save limited bandwidth resources greatly, send up-to-date traffic information more rapidly if only send more new data.Update strategy be with current data in the update cycle the real-time road data and last data in the update cycle the real-time road data compare, comparison procedure is, see in the tlv triple in the data file, whether the traffic behavior code of corresponding speed changes, vicissitudinous data are sent, do not change traffic state information no longer repeat send, to reach the purpose of conserve bandwidth.After executing update strategy, carry out the full strategy of sending out, be exactly in the time that current data was left in the update cycle, send remaining non-lastest imformation to vehicle-mounted receiver device.So just can in the update cycle many as far as possible and important transport information be sent to vehicle-mounted receiver device data.
Control module passes to broadcasting office according to different strategies with various transport information, and broadcasting office is encoded to traffic information data, and the data utilization after dispatching station will encode broadcasts to vehicle-mounted receiver device.
The present invention also provides a kind of traffic information broadcasting delivery system based on intelligent transportation system.
As shown in Figure 4, this system comprises:
Traffic information broadcasting distributing device 402 is used for according to different traffic conditions, adopts different publishing policies;
Vehicle-mounted receiver device 405 is used to receive the Real-time Traffic Information that dispatching station sends.
Above-mentioned traffic information broadcasting distributing device 402 comprises:
The above; only be the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of described claim.
Claims (8)
1, a kind of traffic information broadcast issuing method based on intelligent transportation system is characterized in that, comprising:
The setting proportion threshold value of blocking up;
Obtain the ratio of blocking up;
Judge whether the ratio of blocking up surpasses described threshold value, if the ratio of blocking up, adopts complete the send out strategy and tactful the combining of blocking up above described threshold value; If the ratio of blocking up is no more than described threshold value, complete strategy of employing combines with update strategy.
2, traffic information broadcast issuing method according to claim 1 is characterized in that:
Described complete strategy is meant data and in the update cycle, all transport information sent one by one;
The described strategy that blocks up is meant data in the update cycle, to Vehicle Speed 20 kms/hour below the transport information in highway section send;
Described update strategy is meant data in the update cycle that the transport information in the cycle compares with a transport information and a last Data Update, and the transport information that changes is sent; The transport information that does not change no longer sends.
3, traffic information broadcast issuing method according to claim 1 is characterized in that, described employing is sent out strategy entirely and is meant that with tactful the combining of blocking up elder generation adopts the strategy that blocks up, and complete of employing afterwards is tactful.
4, traffic information broadcast issuing method according to claim 1 is characterized in that, described employing is sent out strategy entirely and is meant employing update strategy earlier with combining of update strategy, adopts the full strategy of sending out afterwards.
5, a kind of traffic information broadcasting distributing device based on intelligent transportation system is characterized in that, comprising:
Module is set, is used for setting the proportion threshold value of blocking up;
The information acquisition module is used to obtain the ratio of blocking up;
Control module is used for judging whether the ratio of blocking up surpasses described threshold value, if the ratio of blocking up, adopts complete the send out strategy and tactful the combining of blocking up above described threshold value; If the ratio of blocking up is no more than described threshold value, complete strategy of employing combines with update strategy.
6, traffic information broadcasting distributing device according to claim 5 is characterized in that:
Described complete strategy is meant data in the update cycle, all location point information sent one by one;
The described strategy that blocks up is meant data in the update cycle, to Vehicle Speed 20 kms/hour below the transport information in highway section send;
Described update strategy is meant data in the update cycle that the transport information in the cycle compares with a transport information and a last Data Update, and the transport information that changes is sent; The transport information that does not change no longer sends.
7, a kind of traffic information broadcasting delivery system based on intelligent transportation system comprises traffic information center, traffic information broadcasting distributing device, broadcasting office, dispatching station and vehicle-mounted receiver device, it is characterized in that, described traffic information broadcasting distributing device comprises:
Module is set, is used for setting the proportion threshold value of blocking up;
The information acquisition module is used to obtain the ratio of blocking up;
Control module is used for judging whether the ratio of blocking up surpasses described threshold value, if the ratio of blocking up, adopts complete the send out strategy and tactful the combining of blocking up above described threshold value; If the ratio of blocking up is no more than described threshold value, complete strategy of employing combines with update strategy.
8, traffic information broadcasting delivery system according to claim 7 is characterized in that:
Described complete strategy is meant data in the update cycle, all location point information sent one by one;
The described strategy that blocks up is meant data in the update cycle, to Vehicle Speed 20 kms/hour below the transport information in highway section send;
Described update strategy is meant data in the update cycle that the transport information in the cycle compares with a transport information and a last Data Update, and the transport information that changes is sent; The transport information that does not change no longer sends.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102637355A (en) * | 2011-02-14 | 2012-08-15 | 北京四维图新科技股份有限公司 | Method and device for updating real-time traffic network information |
| CN102684804A (en) * | 2011-03-16 | 2012-09-19 | 高德软件有限公司 | Method and device for releasing traffic information by radio data broadcasting system |
| CN102739331A (en) * | 2011-03-31 | 2012-10-17 | 神达电脑股份有限公司 | Subcarrier broadcasting system and method |
| CN105070041A (en) * | 2015-07-22 | 2015-11-18 | 金华市聚翔自动化设备有限公司 | Information interaction method based on intelligent traffic interaction system |
| CN109615867A (en) * | 2019-01-28 | 2019-04-12 | 大连海事大学 | A kind of Intelligent road system towards traffic dispersion |
| CN112991713A (en) * | 2019-12-13 | 2021-06-18 | 百度在线网络技术（北京）有限公司 | Data processing method, device, equipment and storage medium |
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| CN1404240A (en) * | 2001-09-05 | 2003-03-19 | 宋建平 | Intelligent traffic information broadcast system |
| JP4295130B2 (en) * | 2004-02-24 | 2009-07-15 | 株式会社日立製作所 | Traffic information system |
| CN101222283B (en) * | 2007-11-29 | 2010-10-13 | 北京航空航天大学 | Network radio station system for real-time broadcasting traffic information based on user position |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102637355A (en) * | 2011-02-14 | 2012-08-15 | 北京四维图新科技股份有限公司 | Method and device for updating real-time traffic network information |
| CN102637355B (en) * | 2011-02-14 | 2014-10-15 | 北京四维图新科技股份有限公司 | Method and device for updating real-time traffic network information |
| CN102684804A (en) * | 2011-03-16 | 2012-09-19 | 高德软件有限公司 | Method and device for releasing traffic information by radio data broadcasting system |
| CN102739331A (en) * | 2011-03-31 | 2012-10-17 | 神达电脑股份有限公司 | Subcarrier broadcasting system and method |
| CN105070041A (en) * | 2015-07-22 | 2015-11-18 | 金华市聚翔自动化设备有限公司 | Information interaction method based on intelligent traffic interaction system |
| CN109615867A (en) * | 2019-01-28 | 2019-04-12 | 大连海事大学 | A kind of Intelligent road system towards traffic dispersion |
| CN112991713A (en) * | 2019-12-13 | 2021-06-18 | 百度在线网络技术（北京）有限公司 | Data processing method, device, equipment and storage medium |
| CN112991713B (en) * | 2019-12-13 | 2022-11-22 | 百度在线网络技术（北京）有限公司 | Data processing method, device, equipment and storage medium |
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