CN102637355A - Method and device for updating real-time traffic network information - Google Patents
Method and device for updating real-time traffic network information Download PDFInfo
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- CN102637355A CN102637355A CN2011100385814A CN201110038581A CN102637355A CN 102637355 A CN102637355 A CN 102637355A CN 2011100385814 A CN2011100385814 A CN 2011100385814A CN 201110038581 A CN201110038581 A CN 201110038581A CN 102637355 A CN102637355 A CN 102637355A
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Abstract
The invention provides a method and device for updating real-time traffic network information, and belongs to the field of real-time traffic information. The method for updating the real-time traffic network information comprises the following steps: determining a plurality of roads with highest priority as a first group of roads; determining a plurality of roads with secondary-high priority as a second group of roads; calculating the average weight of the second group of roads, determining roads with weight more than the average weight in the second group of roads as a third group of roads; acquiring real-time traffic information of the first group of roads and the second group of roads, and transmitting the real-time traffic information to a receiver so that the receiver updates real-time traffic network information in real time. According to the method and the device, the road network situation can be updated in limited bandwidth and short time. The technical scheme of the invention is applicable to a real-time traffic network information system.
Description
Technical field
The present invention relates to the Real-time Traffic Information field, be meant a kind of update method and device of real-time traffic road network information especially.
Background technology
When extracting Real-time Traffic Information renewal road network situation, generally adopt following means: the Real-time Traffic Information that 1, all sends every road of entire city in the prior art; 2, no purpose does not have some roads transmission Real-time Traffic Informations of artificial visual method selection of specification; 3, the indiscriminate transmission Real-time Traffic Information in highway section that all blocks up does not send the Real-time Traffic Information in the non-highway section that blocks up, and is defaulted as and does not block up.
The inventor finds that there is following shortcoming at least in above-mentioned technological means in the process of embodiment of the present invention:
1) for means 1, with present FM modulating bandwidth, almost can't accomplish the transmission of whole road Real-time Traffic Informations at short notice, just do not reach real-time purpose yet;
2) for means 2, the road that the artificial visual method is selected does not occupy representativeness, relies on operating personnel's empirical value, does not possess auditability;
3) for means 3, when block up the highway section too much or some when having some roads to confirm congestion, the error that will cause Real-time Traffic Information to extract.
Summary of the invention
The technical matters that the present invention will solve provides a kind of update method and device of real-time traffic road network information, can be under limited bandwidth, upgrade the road network situation in the short time.
For solving the problems of the technologies described above, embodiments of the invention provide technical scheme following:
On the one hand, a kind of update method of real-time traffic road network information is provided, comprises:
Confirm that priority is that the highest a plurality of roads are first group of road, confirm that priority is that time high a plurality of roads are second group of road;
Calculate the average weight of said second group of road, confirm that weight in said second group of road is the 3rd a group of road greater than the road of said average weight;
Obtain the Real-time Traffic Information of said first group of road and said the 3rd group of road and send to the recipient, for said recipient's updating real-time traffic network information.
Wherein, the Real-time Traffic Information of said first group of road of said acquisition and said the 3rd group of road and sending to also comprises before the recipient:
Confirm that the ratio that said first group of road and said the 3rd group of road account for whole roads is no more than first default value, reach goal-selling to verify selected said first group of road and said the 3rd group of road.
Wherein, said definite priority is that first group of road comprises for the highest a plurality of roads:
Confirm in highway, major urban arterial highway, the historical data that the road that the annual fate that blocks up reaches the above road of second default value and leads to predetermined landmark thing is first group of road.
Wherein, said definite priority is that second group of road comprises for time high a plurality of roads:
Confirm vehicle flowrate and have a lot of social connections in preset range, the annual fate that blocks up is second group of road at the above road and road that leads to predetermined inferior landmark thing below second default value of the 3rd default value in the historical data.
Wherein, the average weight of the said second group of road of said calculating comprises:
Calculate total weight of all second priority roads;
The road sum that calculating is upgraded in Preset Time, quantity total according to said road and said first group of road is confirmed the renewable quantity of second group of road;
The average weight of confirming said second group of road according to the total weight and the said renewable quantity of the said second priority road.
The embodiment of the invention also provides a kind of updating device of real-time traffic road network information, comprising:
Determination module is used for confirming that priority is first group of road for the highest a plurality of roads, confirms that priority is that time high a plurality of roads are second group of road;
Computing module is used to calculate the average weight of said second group of road, confirms that weight in said second group of road is the 3rd a group of road greater than the road of said average weight;
Update module is used to obtain the Real-time Traffic Information of said first group of road and said the 3rd group of road and send to the recipient, for said recipient's updating real-time traffic network information.
Wherein, said device also comprises:
Authentication module; Be used for before update module obtains the Real-time Traffic Information of said first group of road and said the 3rd group of road and sends to the recipient; Confirm that the ratio that said first group of road and said the 3rd group of road account for whole roads is no more than first default value, reach goal-selling to verify selected said first group of road and said the 3rd group of road.
Wherein, said determination module is used for specifically confirming that the road that highway, major urban arterial highway, the annual fate that blocks up of historical data reach the above road of second default value and lead to predetermined landmark thing is first group of road.
Wherein, said determination module specifically is used for confirming vehicle flowrate and have a lot of social connections in preset range, the annual fate that blocks up of historical data is second group of road at the above road and road that leads to predetermined inferior landmark thing below second default value of the 3rd default value.
Wherein, said computing module comprises:
First calculating sub module is used to calculate total weight of all second priority roads;
Second calculating sub module is used to calculate the road sum that in Preset Time, upgrades, and confirms the renewable quantity of second group of road according to the quantity of said road sum and said first group of road;
The 3rd calculating sub module is used for the average weight of confirming said second group of road according to the total weight and the said renewable quantity of the said second priority road.
Embodiments of the invention have following beneficial effect:
In the such scheme; At first confirm the road of needs updating real-time transport information according to the height of priority; Further screen road through the method for calculating weight afterwards; Minimizing needs the road quantity of renewal, thereby can in the limited following short time of bandwidth, upgrade the major trunk roads of entire city and the Real-time Traffic Information of other city strategic roads.
Description of drawings
Fig. 1 is the schematic flow sheet of the update method of embodiments of the invention real-time traffic road network information;
Fig. 2 is the structural representation of the updating device of embodiments of the invention real-time traffic road network information;
Fig. 3 is the real-time traffic road saturation degree synoptic diagram in Shanghai in the embodiments of the invention.
Embodiment
For technical matters, technical scheme and advantage that embodiments of the invention will be solved is clearer, will combine accompanying drawing and specific embodiment to be described in detail below.
Embodiments of the invention are directed against prior art when upgrading the Real-time Traffic Information of road; The transmission data volume is excessive, transmitting time is long or the problem of insufficient bandwidth; A kind of update method and device of real-time traffic road network information are provided, can be under limited bandwidth, upgrade the road network situation in the short time.
Fig. 1 is the schematic flow sheet of the update method of embodiments of the invention real-time traffic road network information, and as shown in Figure 1, present embodiment comprises:
Step 101: confirm that priority is that the highest a plurality of roads are first group of road, confirm that priority is that time high a plurality of roads are second group of road;
Step 102: calculate the average weight of second group of road, confirm that weight in second group of road is the 3rd a group of road greater than the road of average weight;
Step 103: obtain the Real-time Traffic Information of first group of road and the 3rd group of road and send to the recipient, with recipient updating real-time traffic network information.
The update method of the real-time traffic road network information of present embodiment; At first confirm the road of needs updating real-time transport information according to the height of priority; Further screen road through the method for calculating weight afterwards; Minimizing needs the road quantity of renewal, thereby can in the limited following short time of bandwidth, upgrade the major trunk roads of entire city and the Real-time Traffic Information of other city strategic roads.
Fig. 2 is the structural representation of the updating device of embodiments of the invention real-time traffic road network information, and as shown in Figure 2, present embodiment comprises:
Determination module 21 is used for confirming that priority is first group of road for the highest a plurality of roads, confirms that priority is that time high a plurality of roads are second group of road;
Computing module 22 is used to calculate the average weight of second group of road, confirms that weight in second group of road is the 3rd a group of road greater than the road of average weight;
Update module 23 is used to obtain the Real-time Traffic Information of first group of road and the 3rd group of road and send to the recipient, with recipient updating real-time traffic network information.
Wherein, device also comprises:
Authentication module 24; Be used for before update module 23 obtains the Real-time Traffic Information of first group of road and the 3rd group of road and sends to the recipient; Confirm that the ratio that first group of road and the 3rd group of road account for whole roads is no more than first default value, reaches goal-selling to verify selected first group of road and the 3rd group of road.
Wherein, determination module 21 is used for specifically confirming that the road that highway, major urban arterial highway, the annual fate that blocks up of historical data reach the above road of second default value and lead to predetermined landmark thing is first group of road.
Determination module 21 also is used for confirming vehicle flowrate and have a lot of social connections in preset range, annual road and the road that lead to predetermined inferior landmark thing of fate below second default value more than the 3rd default value that block up of historical data is second group of road.
Wherein, computing module 22 comprises:
First calculating sub module is used to calculate total weight of all second priority roads;
Second calculating sub module is used to calculate the road sum that in Preset Time, upgrades, and confirms the renewable quantity of second group of road according to the quantity of road sum and first group of road;
The 3rd calculating sub module is used for the average weight of confirming second group of road according to the total weight and the renewable quantity of the second priority road.
The updating device of the real-time traffic road network information of present embodiment; At first confirm the road of needs updating real-time transport information according to the height of priority; Further screen road through the method for calculating weight afterwards; Minimizing needs the road quantity of renewal, thereby can in the limited following short time of bandwidth, upgrade the major trunk roads of entire city and the Real-time Traffic Information of other city strategic roads.
Below in Shanghai, discuss the renewal process of real-time traffic road network information of the present invention in detail, the road in Shanghai is very intensive, promptly wastes flow and wastes time again if send the Real-time Traffic Information of whole roads.Therefore, note choosing of road network so that Real-time Traffic Information be sent under all identical situation of time spent and bandwidth the purposive important transport information of expressing major trunk roads targetedly.4 steps of main branch of choosing of road network are carried out; At first extract the strategic road that all must the updating real-time transport information; Next chooses time strategic road, these times strategic road that selects is calculated again, and draws the higher road of weight as the road that needs the updating real-time transport information; At last need the road of updating real-time transport information to verify to all that obtain again, see whether the ratio of choosing of road is reasonable.Below these four steps are elaborated:
1, confirm the strategic road of necessary updating real-time transport information, comprising:
Super expressway: except expressing congestion information, super expressway is sometimes because reasons such as weather, accident or maintenance are carried out traffic control with certain inlet or outlet, and also can send similar this event information the updating real-time transport information time.
The city main roads: loop wire & makes a general survey of line; Stride the river, contain the tunnel and the bridge in the interior span river, city (lake) in city, lake, for example: Shanghai Outer Ring Line; Tunnel, outbeach etc.
The serious road of jam situation in the historical data: historical data i.e. the accumulative jam situation of a plurality of versions of this road; This road is regarded as the strategic road of necessary updating real-time transport information after the fate that blocks up in the historical data of the whole year reaches more than 55%, for example: middle mountain Bei Yilu, Jiyang road.
The road that leads to landmark things such as 5A level sight spot, 4S shop, 5 star hotels, restaurant (should be divided into A, B, C class with the city earlier; Is the category-A city like each province provincial capital with each municipality directly under the Central Government; Except that the category-A city; The grade in sight spot and hotel should correspondingly descend), for example: Shanghai leads to the road of Pearl of the Orient;
Lead to the main roads on airport and the road of important race place or rendezvous periphery, like Shanghai World Expo peripheral path.
The road that satisfies in the above condition any one is strategic road that must the updating real-time transport information, through selecting to amount to the road that the Y=10506 bar satisfies above condition.
2, choose the inferior strategic road that possibly need the updating real-time transport information, comprising:
The road that vehicle flowrate is big: carry out grade classification according to a day driving numeral, preceding current power is given a mark to road according to ordering at preceding 30% road, and score value is m;
The slightly serious road of jam situation in the historical data: when the fate that blocks up in the historical data in the whole year reaches 30% to 55%, according to jam situation road is given a mark, score value is n;
Lead to other following sight spots of important 5A level, 5 stars road with subordinate hotel, restaurant.Significance level according to going sight spot and hotel is given a mark to road, and score value is p;
The road broad, its effect is the city main roads, plays the road of main traffic effect.Give a mark according to fabric width and road importance, score value is q.
To above condition, from road network, choose satisfied at least wherein one road and be defined as 2 grades of roads, then select 2 grades of roads of M=53128 bar altogether;
3, these 2 grades of roads that select are calculated, filter out the road that 2 grades of higher roads conducts of weight need the updating real-time transport information:
At first need calculate renewable road quantity in preset update time in this city:
Total real-time traffic road way (X)=this city bandwidth * permission the update time * the road way/(kb * s) of transmission
2 grades of road quantity upper limits of renewable Real-time Traffic Information
Z＝X-Y
For example: the Shanghai wave band is assumed to 76khz, and bandwidth is assumed to 16k, and permission update time is 5min * 60=300s to 10min * 60=600s, and the amount that the every k of per second sends is: 7 highway sections/(k * s), then can calculate
Total real-time traffic road way should be controlled at: between 7 * 16 * 300=16800 to 7 * 16 * 600=33600 bar road
2 grades of road quantity Z that therefore can calculate maximum renewable Real-time Traffic Information are: 16000 roads.
Give weight according to the city situation respectively to 2 grades of roads of every selection; The weight that the big road of vehicle flowrate is set is a; The weight of the road that jam situation is slightly serious in the historical data is b; Lead to other following sight spots of important 5A level, 5 stars are c with the weight of the road in subordinate hotel, restaurant, the weight that is the road city main roads, that play main traffic effect is d.Importance serious such as the Shanghai jam situation, the following hotel of city 5 stars is lower, makes a=13, b=12, c=4, d=6.The total weight that calculates 2 grades of roads is:
P＝∑P
i|i＝1，2，3，…M
P wherein
iRepresent the weight that any 2 grades of road is corresponding, P is total weight of whole 2 grades of roads; The average weight of 2 grades of roads is P/Z, and the quantity of 2 grades of roads that filter out is:
Wherein M is the road way that satisfies 2 grades of road selection standards at least; N is 2 grades of road ways that filter out, R
iBe any 2 grades of road number.If the weight of a certain 2 grades of roads, confirms then that these 2 grades of roads are 2 grades of roads that filter out greater than average weight, the quantity of adding up all 2 grades of roads that filter out just draws N.
After 2 grades of roads to Shanghai calculate weight, all P have been selected according to above-mentioned data
iThe road N that is higher than average weight is individual; Totally 15598 roads; Less than 16000 roads of 2 grades of road quantity of the maximum renewable Real-time Traffic Information of gained, determined 10506 roads that must the updating real-time transport information amount to 26104 roads before adding.
Give up the step of getting till now and accomplish, compressed 98% quantity of information altogether, sending all road informations only needs 8 minutes.
4, calculating real-time traffic route saturation degree, whether the ratio of choosing of checking road is reasonable:
Selected road is compared with whole roads; In Shanghai, obtain the real-time traffic road saturation degree synoptic diagram in Shanghai as shown in Figure 3, can find out by Fig. 3; The center, city is to choose the higher zone of road closeness; The saturation degree that center, city real-time traffic road network is chosen is no more than 75%, and choosing one by one of peripheral path successively decreased, and can find out that this railway network planning is more reasonable.
After the rationality of the ratio of choosing of having verified road, just can send the Real-time Traffic Information of selected road, reach the purpose of upgrading the road network situation.
The update method of the real-time traffic road network information of present embodiment solves in the prior art and to send that data volume is excessive, transmitting time is long or problem such as insufficient bandwidth, and this method comprises the standard of selecting road; Under standard compliant prerequisite, calculate the road that the further affirmation of weight is preferentially chosen; Using historical data to carry out road network chooses; Use the city to make data saturation degree chart as system of units and confirm the rationality that road network is chosen as the central peripheral milimeter number.The invention enables the transmission of Real-time Traffic Information can be at the major trunk roads and other city strategic roads that in 5-10 minute, upgrade entire city under the limited bandwidth.
At first confirm the road of needs updating real-time transport information according to the height of priority; Further screen road through the method for calculating weight afterwards; Minimizing needs the road quantity of renewal, thereby can in the limited following short time of bandwidth, upgrade the major trunk roads of entire city and the Real-time Traffic Information of other city strategic roads.
Said method embodiment is corresponding with said device embodiment; The description of relevant portion gets final product among the part comparable device embodiment that in method embodiment, does not describe in detail, and the description of relevant portion gets final product among the part reference method embodiment that in device embodiment, does not describe in detail.
One of ordinary skill in the art will appreciate that; Realize that all or part of step in the foregoing description method is to instruct relevant hardware to accomplish through program; Described program can be stored in the computer read/write memory medium, and this program comprises the step like above-mentioned method embodiment when carrying out; Described storage medium; As: magnetic disc, CD, read-only storage memory body (Read-Only Memory, ROM) or at random store memory body (Random Access Memory, RAM) etc.
In each method embodiment of the present invention; The sequence number of said each step can not be used to limit the sequencing of each step; For those of ordinary skills, under the prerequisite of not paying creative work, the priority of each step is changed also within protection scope of the present invention.
The above is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from principle according to the invention; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (10)
1. the update method of a real-time traffic road network information is characterized in that, comprising:
Confirm that priority is that the highest a plurality of roads are first group of road, confirm that priority is that time high a plurality of roads are second group of road;
Calculate the average weight of said second group of road, confirm that weight in said second group of road is the 3rd a group of road greater than the road of said average weight;
Obtain the Real-time Traffic Information of said first group of road and said the 3rd group of road and send to the recipient, for said recipient's updating real-time traffic network information.
2. the update method of real-time traffic road network information according to claim 1 is characterized in that, the Real-time Traffic Information of said first group of road of said acquisition and said the 3rd group of road and sending to also comprises before the recipient:
Confirm that the ratio that said first group of road and said the 3rd group of road account for whole roads is no more than first default value, reach goal-selling to verify selected said first group of road and said the 3rd group of road.
3. the update method of real-time traffic road network information according to claim 2 is characterized in that, said definite priority is that first group of road comprises for the highest a plurality of roads:
Confirm in highway, major urban arterial highway, the historical data that the road that the annual fate that blocks up reaches the above road of second default value and leads to predetermined landmark thing is first group of road.
4. the update method of real-time traffic road network information according to claim 2 is characterized in that, said definite priority is that second group of road comprises for time high a plurality of roads:
Confirm vehicle flowrate and have a lot of social connections in preset range, the annual fate that blocks up is second group of road at the above road and road that leads to predetermined inferior landmark thing below second default value of the 3rd default value in the historical data.
5. the update method of real-time traffic road network information according to claim 2 is characterized in that, the average weight of the said second group of road of said calculating comprises:
Calculate total weight of all second priority roads;
The road sum that calculating is upgraded in Preset Time, quantity total according to said road and said first group of road is confirmed the renewable quantity of second group of road;
The average weight of confirming said second group of road according to the total weight and the said renewable quantity of the said second priority road.
6. the updating device of a real-time traffic road network information is characterized in that, comprising:
Determination module is used for confirming that priority is first group of road for the highest a plurality of roads, confirms that priority is that time high a plurality of roads are second group of road;
Computing module is used to calculate the average weight of said second group of road, confirms that weight in said second group of road is the 3rd a group of road greater than the road of said average weight;
Update module is used to obtain the Real-time Traffic Information of said first group of road and said the 3rd group of road and send to the recipient, for said recipient's updating real-time traffic network information.
7. the updating device of real-time traffic road network information according to claim 6 is characterized in that, said device also comprises:
Authentication module; Be used for before update module obtains the Real-time Traffic Information of said first group of road and said the 3rd group of road and sends to the recipient; Confirm that the ratio that said first group of road and said the 3rd group of road account for whole roads is no more than first default value, reach goal-selling to verify selected said first group of road and said the 3rd group of road.
8. the updating device of real-time traffic road network information according to claim 7 is characterized in that,
Said determination module is used for specifically confirming that the road that highway, major urban arterial highway, the annual fate that blocks up of historical data reach the above road of second default value and lead to predetermined landmark thing is first group of road.
9. the updating device of real-time traffic road network information according to claim 7 is characterized in that,
Said determination module specifically is used for confirming vehicle flowrate and have a lot of social connections in preset range, the annual fate that blocks up of historical data is second group of road at the above road and road that leads to predetermined inferior landmark thing below second default value of the 3rd default value.
10. the updating device of real-time traffic road network information according to claim 7 is characterized in that, said computing module comprises:
First calculating sub module is used to calculate total weight of all second priority roads;
Second calculating sub module is used to calculate the road sum that in Preset Time, upgrades, and confirms the renewable quantity of second group of road according to the quantity of said road sum and said first group of road;
The 3rd calculating sub module is used for the average weight of confirming said second group of road according to the total weight and the said renewable quantity of the said second priority road.
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| CN102637355B (en) | 2014-10-15 |
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