CN104346945A - Method for receiving and displaying dynamic traffic information via FM and navigation apparatus - Google Patents
Method for receiving and displaying dynamic traffic information via FM and navigation apparatus Download PDFInfo
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- CN104346945A CN104346945A CN201310326045.3A CN201310326045A CN104346945A CN 104346945 A CN104346945 A CN 104346945A CN 201310326045 A CN201310326045 A CN 201310326045A CN 104346945 A CN104346945 A CN 104346945A
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- traffic information
- message
- tmc data
- tmc
- segmental arc
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
- G08G1/091—Traffic information broadcasting
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
- G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
- G08G1/0968—Systems involving transmission of navigation instructions to the vehicle
- G08G1/096855—Systems involving transmission of navigation instructions to the vehicle where the output is provided in a suitable form to the driver
Abstract
The embodiment of the invention provides a method for receiving and displaying dynamic traffic information via FM and a navigation apparatus. The method for receiving and displaying dynamic traffic information via FM is applied to the navigation apparatus. The method comprises the steps of: reading TMC data in each cycle; analyzing the TMC data in order to obtain traffic information; matching the traffic information with a segment corresponding to a road according to a position point record of the traffic information, and displaying the traffic information on the two sides of the road corresponding to the matched segment. User messages and system messages acquired by analyzing TMC data are used as the traffic information. The traffic information can be matched with different segments of the road because having the position point record. The traffic information is displayed at the matched segment in order to prompt drivers. Therefore, the displayed position of the traffic information on the road is accurately positioned and such a process is available in different cities.
Description
Technical field
The present invention relates to airmanship, refer to a kind of method and the guider that are received by FM and show dynamic information especially.
Background technology
Remote date transmission-Traffic Message Channel (RDS-TMC, Remote Data Services-Traffic Message Channel) in technology, RDS is the european norm of the Radio Data System that European Broadcasting Union (EBU) formulates, RDS-TMC utilizes existing fm resources, realizing by inserting numerical code in broadcast singal, only needing a small amount of investment can build up broadcast transmission end.It and sound signal are what to be separated, at all can not disturb radio reception, also can not affect tonequality.Detect when radio and after these numerical codes of demodulation, just can provide corresponding function.The wireless fm band of RDS is at 87.5 ~ 108.0MHz, and adjacent radio station wave band interval at least 100kHz, 57kHz loads subcarrier data.
Traffic Message Channel (TMC, Traffic Message Channel) is a digital encoding system.TMC can produce continuous print transport information stream, as traffic congestion or accident, can report the site of an accident and time result.Information includes the traffic in certain territorial scope.TMC information and digital map navigation are combined, improves the accuracy of automobile navigation to front road condition predicting.
RDS-TMC is the application adopting RDS technology to realize TMC Information issued.Transport information, before broadcast according to TMC standard code, adopts RDS technology to issue, vehicle-mounted terminal equipment receives.
In urban road network, road key element is convertible into graticule mesh, node, road.Geographic Information System (GIS) data (GIS) model tormulation mainly contains: point, line, surface three kinds.By abstract for node be a little, by abstract for road be oriented segmental arc, urban road network can be transformed to a figure easily.
There are the following problems for prior art: in onboard navigation system, dynamic traffic traffic information is provided by FM, only support a few metropolitan dynamic traffic traffic information data, owing to lacking the technology that the segmental arc corresponding to road processes, cause to the location of the display position of traffic information on road not accurate enough-traffic information is directly presented on road, segment path key element can be override, and slower to the processing speed of dynamic traffic traffic information.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of method and the guider that are received by FM and show dynamic information, solving existingly provides the location of the technology of dynamic traffic traffic information to the display position of traffic information on road not accurate enough by FM, the technological deficiency slower to the processing speed of dynamic traffic traffic information.
For solving the problems of the technologies described above, embodiments of the invention provide a kind of method being received by FM and show dynamic information, and be applied to guider, method comprises: within each cycle, read TMC data; Resolve TMC data and obtain traffic information; According to the location point record of described traffic information, segmental arc corresponding with road for described traffic information is mated, described traffic information is presented at the both sides of the described road corresponding to the segmental arc that the match is successful.
Described method, resolve TMC data and obtain traffic information, comprise: judge that TMC data are the new system messages in described traffic information, if the application identities code of described new system message is effective, by this new system message stored in system message list, in order to be presented on the screen of guider.
Described method, resolves TMC data and obtains traffic information, comprising: judge that TMC data are the user messages in described traffic information, when TMC data are single group messages, by user message stored in user message list; When TMC data are many group messages, after receiving last subgroup message, resolve and whole describedly organize message more, obtain the location point ID in the first subgroup message, traffic events, coverage, affect direction and continuity index, obtain the free data in non-first subgroup message, group sequence identifier and continuity index, and stored in user message list.
Described method, also comprises after the user message in judgement TMC data specifically described traffic information: from TMC data, obtain TMC position table number code; Judge that whether TMC position table number code is effective, perform subsequent step when active.
Described method, the described location point record according to traffic information, mates described traffic information with the segmental arc of road, comprising: from user message list, read a user message; In the coverage of user message, travel through each location point record according to the location point ID of user message, described location point record houses the mapping relations of location point ID and segmental arc; Find all segmental arcs of mating with described location point ID.
Described method, all segmental arcs of mating with described location point ID are found to comprise: to travel through each segmental arc according to location point ID, if the direction of current segmental arc is consistent with the direction of user message, then set the traffic information of this segmental arc, if the direction of current segmental arc is different with the direction of user message, do not process.
Described method, is presented at the both sides of the described road corresponding to the segmental arc that the match is successful, comprises by described traffic information: the rectangle frame obtaining screen, obtains all graticule mesh crossing with rectangle frame; For a graticule mesh, calculate the intersecting ranges of graticule mesh and screen; Obtain the shape point coordinate of current segmental arc in graticule mesh, obtain the traffic information on two current directions of current segmental arc, and, obtain corresponding line style according to traffic information; Shape point coordinate and line style being put into draws in buffer zone, waits for that draw engine draws on screen.
Described method, described traffic information is placed on the both sides of the described road corresponding to the segmental arc that the match is successful, also comprise: the line style display traffic adopting different colours, line style comprises: the red line style representing traffic congestion, represent traffic yellow line style slowly, represent the green line style of smooth traffic.
A kind of guider, comprising: TMC data processing unit, within each cycle, reads TMC data, carries out verification of correctness to TMC data; Resolution unit, obtains traffic information for resolving TMC data; Matching unit, for the location point record according to traffic information, mates segmental arc corresponding with road for described traffic information, described traffic information is presented at the both sides of the described road corresponding to the segmental arc that the match is successful.
Described guider, resolution unit comprises: user message parsing module, for judging the user message of TMC data specifically in described traffic information, when TMC data are single group messages, by user message stored in user message list; When TMC data are many group messages, after receiving last subgroup message, resolve and whole describedly organize message more, obtain the location point ID in the first subgroup message, traffic events, coverage, affect direction and continuity index, obtain the free data in non-first subgroup message, group sequence identifier and continuity index, and stored in user message list.
The beneficial effect of technique scheme of the present invention is as follows: obtain user message and system message as traffic information by resolving TMC data, traffic information has oneself location point record, therefore, it is possible to realize mating from the different segmental arcs of road, after the match is successful, the both sides that described traffic information is placed on the road corresponding to segmental arc that the match is successful are reminded driver, achieve the accurate location to the display position of different traffic informations on road, accelerate the speed of process dynamic traffic traffic information, and this technology is all applicable in different cities.
Accompanying drawing explanation
Fig. 1 represents in the embodiment of the present invention method flow schematic diagram being received and show dynamic information by FM;
Fig. 2 represents in the embodiment of the present invention schematic flow sheet of the system message of resolving TMC data;
Fig. 3 represents in the embodiment of the present invention schematic flow sheet of the user message of resolving TMC data;
Fig. 4 represents the process schematic of TMC data and path adaptation in the embodiment of the present invention;
Fig. 5 represents in the embodiment of the present invention process schematic showing dynamic information;
Fig. 6 represents the structural representation of guider in the embodiment of the present invention.
Embodiment
For making the technical problem to be solved in the present invention, technical scheme and advantage clearly, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
Provide the solution in each city of nationwide, first the display data of TMC data and road conditions are compiled, in application, use the compiling data after compiling, can for different products, different cities provides solution, traffic information is presented at road both sides.
The embodiment of the present invention provides a kind of method being received by FM and show dynamic information, is applied to guider, comprises:
Step 101, within each cycle, reads TMC data;
Step 102, resolves TMC data and obtains traffic information;
Step 103, according to the location point record of described traffic information, mates segmental arc corresponding with road for described traffic information, described traffic information is presented at the both sides of the described road corresponding to the segmental arc that the match is successful.
The technical scheme provided is provided, traffic information is obtained by resolving TMC data, because traffic information has the location point record of oneself, therefore, it is possible to realize mating from the different segmental arcs of road, after the match is successful, traffic information is placed on the segmental arc place that the match is successful and reminds driver, for different cities, as long as have the data of the urban road network in this city, just can use technology provided by the invention, embody compatibility good between this technology and different cities road network.
Guider reads once up-to-date TMC data every the set time from receiver, the correctness of checking TMC data.In this process, verification of correctness can be carried out to the TMC data received before the type distinguishing TMC data, but because the TMC data containing system message can not make mistake, therefore normally the correctness of the TMC data containing user profile is verified: determine current reception be the TMC data containing user profile after, when the number of times of these TMC data of checking reception is more than or equal to pre-determined number, determine to proper reception of this TMC data.
Resolve and display TMC data: TMC data define TMC system message and user profile data structure, the TMC data of guider to this two type are resolved, and be stored in internal memory, TMC user message is wherein mated with concrete road, be placed on after the match is successful on corresponding position, system message wherein directly can be presented on screen.
TMC traffic information location point: a series of location points that TMC standard pre-establishes, is used to refer to the position of generation problem location, section or point.Each location point has unique code, with+,-, P, N represent the direction of location point.TMC location point is needed to match on road in practical application.
After FM receiver powers on, to receive and the flow process processing TMC data comprises:
Step 1, receives TMC data to receiver buffer zone, only stores up-to-date TMC data, TMC data 8 bytes in receiver buffer zone.
Step 2, reads TMC data in internal memory, starts to process this TMC data.
Step 3, judges the type of TMC data: 3A type is system message, and 8A type is user message, resolves this TMC data according to type.
Step 4, waits for 40 milliseconds, namely waits for the arrival of next cycle.
The self-contained mark having the type of these TMC data of mark of TMC data, guider identifies according to it after receiving TMC data, and 3A type is system message, and 8A type is user message, after the type having distinguished TMC data, so that resolve this TMC data according to type further.
In a preferred embodiment, resolve TMC data and obtain traffic information, comprise: judge the TMC data new system message specifically in described traffic information, if the application identities code of described new system message is effective, by this new system message stored in system message list, in order to be presented on the screen of guider.
The data structure of table 1TMC system message
As shown in Figure 2, the flow process of resolving the system message of TMC data comprises:
Step 201, judges that whether the application identities code (AID) of TMC data is effective, comprising: the application identities code AID obtaining these TMC data, if AID is 0xCD46 or 0x0D45, performs step 202, otherwise perform step 210.
Whether step 202, judges the system message whether these TMC data are new: in system message list, search these TMC data exist, do not exist and be shown to be new system message, performs step 203, otherwise performs step 210.
Step 203, obtains program identification code (PI CODE) and variable code.
Step 204, whether judgment variable code is 1, performs step 206 when variable code is 1, otherwise performs step 205.
Step 205, obtains TMC position table number code (LTN), performs step 207.
Step 206, obtains service identifiers code SID, goes to step 209.
Step 207, when judging that TMC position table number code (LTN) whether be 0, LTN is 0, performs step 208, otherwise performs step 209.
Step 208, setting encryption identification is 1.
These TMC data are deposited in system message list by step 209.
Step 210, terminates.
New system message is the system-level message that Traffic Message Channel issues, be with the difference of user message, system-level message normally sends to whole guiders or guider partly, user message then sends to specific guider, and, new system message can not be presented at the both sides of road, but in the region that the screen being presented at guider retains for new system message, but this does not get rid of the both sides new system message being also shown in road, and, the content of new system message in certain situations can be close with user message even identical, this usually occurs in following situation: when user drives to A section, and there is burst situation in A section, therefore, new system message is the description of the situation about A section, so now, may be close even identical about the new system message in A section with user message.
Resolve in the process of TMC user message, comprising:
In a preferred embodiment, the number of times receiving same TMC data is more than or equal to twice, determines to proper reception of this TMC data.
In a preferred embodiment, resolve TMC data and obtain traffic information, comprising:
Judge the TMC data user message specifically in described traffic information,
When TMC data are single group messages, by user message stored in user message list;
When TMC data are many group messages, after receiving last subgroup message, resolve and whole describedly organize message more, obtain the location point ID in the first subgroup message, traffic events, coverage, affect direction and continuity index, obtain the free data in non-first subgroup message, group sequence identifier and continuity index, and stored in user message list.
The data structure of table 2TMC user message
After receiving all subgroup messages of many group messages, the information of all subgroup messages can be carried out aggregation process, all subgroup messages are combined into a complete Message Record.
Continuity index, whether identify this group message is subgroup message in same many group messages, if continuity index identical be exactly samely organize message more.
Group sequence identifier, identify this group message is which the subgroup message organized in message more, suppose there is N group subgroup message in many group messages, the first subgroup message has a flag mark to be the first subgroup message, and the group sequence identifier from the second subgroup is exactly that N-2 is to 0.
In a preferred embodiment, when judgement TMC data are encrypted, identification code (ENCID) and the mode code (TEST MODE) of deciphering use is obtained.
In a preferred embodiment, also comprise after the user message in judgement TMC data specifically described traffic information:
TMC position table number code is obtained from TMC data;
Judge that whether TMC position table number code is effective, perform subsequent step when active.
As shown in Figure 3, resolve in the application scenarios of the user message of TMC data at one, comprising:
Step 301, TMC data correctness judges: judge whether receive current TMC data is more than or equal to twice.Receive same TMC data to be more than or equal to twice expression and to proper reception of this TMC data, perform step 302, otherwise perform step 310.
Step 302, judges that whether current TMC data are encrypted.
Encryption identification be 1 and also encryption handling Data Identification position everybody be 0 entirely, show that this TMC data are through encryption, should step 305 be performed, otherwise perform step 307.
Step 303, TMC data are common user messages, need first to judge whether to have received effective TMC position table number code (LTN), effectively go to step 304, otherwise perform step 311.
Step 304, user message adopts single group user's message or many group user's messages to transmit, and judges whether TMC data are singly organize message, are perform step 307, otherwise performs step 308.
Step 305, obtains identification code (ENCID) and the mode code (TEST MODE) of deciphering use.
Step 306, obtains correct TMC position table number code (LTN), performs step 311.
Step 307, resolves and singly organizes user's message.Setting single group user's message is designated 1, if encryption identification is 1, decrypted positions point, if encryption identification is 0, then directly obtains location point, obtains traffic events, coverage, affects direction, shunts the data such as suggestion and duration.Perform step 309.
Step 308, when TMC data are many group messages, after receiving last subgroup message, resolve and whole describedly organize message more, obtain the location point ID in the first subgroup message, traffic events, coverage, affect direction and continuity index, obtain the free data in non-first subgroup message, group sequence identifier and continuity index, and stored in user message list.
In this process: if the first subgroup of many group user's messages, if encryption identification is 1, then decrypted positions point, setting single group user's message is designated 0, if encryption identification is 0, then directly obtain location point, obtain traffic events, coverage, affect the data such as direction and continuity index; If other subgroups of many group user's messages, be obtained from by data, data such as group sequence identifier and continuity index etc. from other subgroups.
Step 309, if user message is not the message cancelling type, then upgrades user message list, comprising:
User message list is empty, then user message is joined user message list end.
User message list is not empty, and circulate whole user message list, deletes message identical with new user message in user message list.
Go to step 311.
Step 310, interim this user message of storage, waits other technologies to be employed to detect the correctness of this user message.
Step 311, terminates.
In a preferred embodiment, the process of TMC data and path adaptation comprises:
A user message is read from user message list;
In user message coverage, travel through each location point record according to the location point ID of user message, the mapping relations of deposit position point ID and segmental arc in described location point record;
Find all segmental arcs of mating with location point ID.
The data structure of table 3TMC location point
The mapping relations of location point and segmental arc are obtained from compiling data.If user message affects multiple location point, the location point ID in user message is the ID of first location point, can record the number of the follow-up location point of impact in Message Record simultaneously.The front and continued successor relationship of all location point ID is stored, for processing the user message of multiposition point fast in compiling data.The segmental arc information getting all location point ID corresponding processes.Wherein, compiling data are multidate information data of compiling, and compiled storage in advance in a device, covers the city in the whole nation, and all information processings of the present invention are all carried out based on these compiling data.
In a preferred embodiment, all segmental arcs of mating with location point ID are found to comprise:
Travel through each segmental arc according to location point ID, the direction of segmental arc is forward or negative sense, if the direction of current segmental arc and the direction of user message consistent, then set the traffic information of this segmental arc, direction difference does not then process.
The relational structure that table 4TMC location point and segmental arc map
As shown in Figure 4, the process of TMC data and path adaptation comprises:
Step 401, judges whether there are TMC data in user message list, has TMC data then to perform step 402, does not have TMC data then to perform step 409.
Step 402, judges whether to process the last item TMC data be in user message list, does not then perform step 403, has processed the last item that is over and then performed step 409.
Step 403, takes TMC data in the messaging list of family, obtains the location point ID of current TMC data.
Step 404, obtains this location point record in compiling data according to the location point ID of current TMC data.
Step 405, judges whether the location point of TMC data influence is disposed, if the location point in coverage is all treated, performs step 402, otherwise performs step 406.
Step 406, reads untreated location point record, obtains untreated location point ID, judges whether there is this location point ID in compiling data, performs step 407, do not exist and perform step 402 if existed.
Step 407, obtains the mapping relations of location point and segmental arc from compiling data.
Step 408, the segmental arc that process location point is corresponding, comprising: from compiling data, obtain all segmental arcs corresponding to location point ID according to location point ID, the direction of these segmental arcs has forward also to have negative sense,
Travel through all segmental arcs, if the direction of current segmental arc is consistent with the direction of TMC data, then process this segmental arc, set the traffic information of this segmental arc, direction difference does not process.
Be disposed and return step 406.
Step 409, coupling terminates.
Contain location point ID in TMC data, can find location point record according to this location point ID in compiling data, the corresponding relation between the location point ID recorded according to this location point record and segmental arc, realizes the coupling of TMC data and road.
In a preferred embodiment, described traffic information is presented at the both sides of the described road corresponding to the segmental arc that the match is successful, comprises:
Obtain the rectangle frame of screen, obtain all graticule mesh crossing with rectangle frame;
For a graticule mesh, calculate the intersecting ranges of graticule mesh and screen;
Obtain the shape point coordinate of current segmental arc in graticule mesh, obtain the traffic information on two current directions of current segmental arc, and, obtain corresponding line style according to traffic information;
Shape point coordinate and line style being put into draws in buffer zone, waits for that draw engine draws on screen.
In units of graticule mesh, organising data is carried out in system.Graticule mesh, be carry out by longitude and latitude scope the rectangular area that divides in electronic chart, the relatively whole electronic chart data volume of the navigation data in this rectangular area is less, carries out process more convenient.
In a preferred embodiment, obtain the traffic information on two current directions of current segmental arc, specifically comprise:
Current direction there is traffic information then to obtain corresponding line style, current direction does not have traffic information then not process.
In a preferred embodiment, described traffic information is placed on the both sides of the described road corresponding to the segmental arc that the match is successful, also comprises:
Adopt the line style display traffic of different colours, line style comprises: the red line style representing traffic congestion, represents traffic yellow line style slowly, represents the green line style of smooth traffic.
As shown in Figure 5, the process of dynamic display traffic information comprises:
Step 501, the line style of initialization three kinds of colors.
Redness, yellow and green, corresponding three kinds of traffics respectively, red corresponding traffic congestion, yellow corresponding traffic is slow, green corresponding smooth traffic.
Step 502, obtains graticule mesh all in current screen.
Step 503, judges whether all graticule mesh are disposed, and all graticule mesh are disposed and then perform step 510.Do not process, then perform step 504.
Step 504, calculates the intersecting ranges of current mesh and screen: the rectangle frame obtaining screen, obtains all graticule mesh crossing with rectangle frame; For a graticule mesh, calculate the intersecting ranges of graticule mesh and screen.Obtain the graticule mesh number of all graticule mesh crossing with rectangle frame, the shape of segmental arc, segmental arc and traffic information.
Step 505, judges in graticule mesh, whether all segmental arcs are disposed, and all segmental arcs are disposed and then perform step 503, otherwise perform step 506.
Step 506, obtains the shape point coordinate of current segmental arc.
Step 507, judge that all shape point coordinates of current segmental arc are not whether in screen, all shape point coordinates then do not skip to step 505 in screen, otherwise perform step 508.
Step 508, comprises the process of the traffic information of segmental arc: obtain the traffic information on two current directions of current segmental arc.
Step 509, current direction does not have traffic information then not process, has traffic information then to obtain corresponding line style, then shape point coordinate and line style are put into and draw in buffer zone, waits for that draw engine draws on screen.Skip to step 503.
Step 510, terminates.
Graticule mesh, be carry out by longitude and latitude scope the rectangular area that divides in electronic chart, the relatively whole electronic chart data volume of the navigation data in this rectangular area is less, carries out process more convenient, therefore, in embodiment, the graticule mesh that all rectangle frames corresponding with screen are crossing is obtained; For one of them graticule mesh, calculate the intersecting ranges of graticule mesh and screen.Obtain the graticule mesh number of all graticule mesh crossing with rectangle frame, graticule mesh segmental arc data, the shape data of graticule mesh segmental arc and the road condition data of graticule mesh
The embodiment of the present invention also provides a kind of guider, as shown in Figure 6, comprising:
TMC data processing unit 601, within each cycle, reads TMC data;
Resolution unit 602, obtains traffic information for resolving TMC data;
Matching unit 603, for the location point record according to traffic information, mates segmental arc corresponding with road for described traffic information, described traffic information is presented at the both sides of the described road corresponding to the segmental arc that the match is successful.
In a preferred embodiment, resolution unit 602 comprises:
User message parsing module, for judging the user message of TMC data specifically in described traffic information,
When TMC data are single group messages, by user message stored in user message list;
When TMC data are many group messages, after receiving last subgroup message, resolve and whole describedly organize message more, obtain the location point ID in the first subgroup message, traffic events, coverage, affect direction and continuity index, obtain the free data in non-first subgroup message, group sequence identifier and continuity index, and stored in user message list.
The advantage after this programme is adopted to be: FM wide coverage and signal is strong, TMC is ripe mass transportation traffic information solution, user can use FM to receive TMC data very easily, screen is seen the traffic congestion situation in present period city intuitively, red line shows that present road compares and blocks up, and yellow line shows present road low running speed; User according to traffic congestion situation, in conjunction with path planning, can make travel route the most efficiently, improves road efficiency and Vehicle Speed.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from principle of the present invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. received and show a method for dynamic information by FM, it is characterized in that, be applied to guider, method comprises:
Within each cycle, read TMC data;
Resolve TMC data and obtain traffic information;
According to the location point record of described traffic information, segmental arc corresponding with road for described traffic information is mated, described traffic information is presented at the both sides of the described road corresponding to the segmental arc that the match is successful.
2. method according to claim 1, is characterized in that, resolves TMC data and obtains traffic information, comprising:
Judge that TMC data are the new system messages in described traffic information,
If the application identities code of described new system message is effective, by this new system message stored in system message list, in order to be presented on the screen of guider.
3. method according to claim 1, is characterized in that, resolves TMC data and obtains traffic information, comprising:
Judge that TMC data are the user messages in described traffic information,
When TMC data are single group messages, by user message stored in user message list;
When TMC data are many group messages, after receiving last subgroup message, resolve and whole describedly organize message more, obtain the location point ID in the first subgroup message, traffic events, coverage, affect direction and continuity index, obtain the free data in non-first subgroup message, group sequence identifier and continuity index, and stored in user message list.
4. method according to claim 3, is characterized in that, also comprises after the user message in judgement TMC data specifically described traffic information:
TMC position table number code is obtained from TMC data;
Judge that whether TMC position table number code is effective, perform subsequent step when active.
5. the method according to claim 1 or 3, is characterized in that, the described location point record according to traffic information, is mated by described traffic information, comprising with the segmental arc of road:
A user message is read from user message list;
In the coverage of user message, travel through each location point record according to the location point ID of user message, described location point record houses the mapping relations of location point ID and segmental arc;
Find all segmental arcs of mating with described location point ID.
6. method according to claim 5, is characterized in that, finds all segmental arcs of mating with described location point ID to comprise:
Travel through each segmental arc according to location point ID, if the direction of current segmental arc and the direction of user message consistent, then set the traffic information of this segmental arc, if the direction of current segmental arc is different with the direction of user message, do not process.
7. method according to claim 1, is characterized in that, described traffic information is presented at the both sides of the described road corresponding to the segmental arc that the match is successful, comprises:
Obtain the rectangle frame of screen, obtain all graticule mesh crossing with rectangle frame;
For a graticule mesh, calculate the intersecting ranges of graticule mesh and screen;
Obtain the shape point coordinate of current segmental arc in graticule mesh, obtain the traffic information on two current directions of current segmental arc, and, obtain corresponding line style according to traffic information;
Shape point coordinate and line style being put into draws in buffer zone, waits for that draw engine draws on screen.
8. the method according to claim 1 or 7, is characterized in that, described traffic information is placed on the both sides of the described road corresponding to the segmental arc that the match is successful, also comprises:
Adopt the line style display traffic of different colours, line style comprises: the red line style representing traffic congestion, represents traffic yellow line style slowly, represents the green line style of smooth traffic.
9. a guider, is characterized in that, comprising:
TMC data processing unit, within each cycle, reads TMC data, carries out verification of correctness to TMC data;
Resolution unit, obtains traffic information for resolving TMC data;
Matching unit, for the location point record according to traffic information, mates segmental arc corresponding with road for described traffic information, described traffic information is presented at the both sides of the described road corresponding to the segmental arc that the match is successful.
10. guider according to claim 9, is characterized in that, resolution unit comprises:
User message parsing module, for judging the user message of TMC data specifically in described traffic information,
When TMC data are single group messages, by user message stored in user message list;
When TMC data are many group messages, after receiving last subgroup message, resolve and whole describedly organize message more, obtain the location point ID in the first subgroup message, traffic events, coverage, affect direction and continuity index, obtain the free data in non-first subgroup message, group sequence identifier and continuity index, and stored in user message list.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310326045.3A CN104346945B (en) | 2013-07-30 | 2013-07-30 | Method for receiving and displaying dynamic traffic information via FM and navigation apparatus |
Applications Claiming Priority (1)
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