CN101294813A - Navigation device and traffic information channel switching method - Google Patents
Navigation device and traffic information channel switching method Download PDFInfo
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- CN101294813A CN101294813A CNA2007100277616A CN200710027761A CN101294813A CN 101294813 A CN101294813 A CN 101294813A CN A2007100277616 A CNA2007100277616 A CN A2007100277616A CN 200710027761 A CN200710027761 A CN 200710027761A CN 101294813 A CN101294813 A CN 101294813A
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Abstract
The invention discloses a navigation device and a method thereof for switching Traffic Message Channels. The processing module of the navigation device can adjust the weight of a plurality of Traffic Message Channels (TMC) and generate a TMC ranking table; when the intensity of the TMC signal detected by the TMC receiving module of the navigation device is lower than a threshold value, the TMC receiving module selects a preferential traffic message channel from the TMC ranking table for locking so as to increase the channel switching efficiency and the switching times of the TMC receiving module.
Description
Technical field
The present invention is relevant for a kind of guider and traffic information channel switching method thereof, particularly relevant for a kind of guider and traffic information channel switching method thereof of setting up the TMC priority list.
Background technology
(Traffic Message Channel TMC) is a digital encoding system to Traffic Message Channel, is to utilize existing fm resources, inserts numerical code to be sent to a receiving end in broadcast message.Because numerical code and voice signal frequently separate, can't disturb radio reception and wireless tonequality so insert numerical code.TMC can provide continuous transport information, and for example traffic congestion or accident can be reported the site of an accident and time result.Its information has comprised the traffic in certain territorial scope.When guider is provided with the Traffic Message Channel receiver, just but receiving traffic information can show in many ways after the decoding of information, as literal, figure or language, and with data presentation that transport information comprised on the map of guider.Therefore, in conjunction with TMC information and digital map navigation, can improve the accuracy of automobile navigation to the place ahead road condition predicting.
Because Traffic Message Channel sees through frequency modulation broadcasting, its being limited in scope of can containing of each broadcast base station, moreover if the driver travels in the city, then Traffic Message Channel also is subjected to the influence of high building easily.When the TMC receiver module detects signal when too weak, can search another available channel automatically, find just to lock this channel behind the available channel and come receiving traffic information.Yet this kind way has following point:
(1) if the locking the channel signals instability, the TMC receiver module may need to switch once more, so causes TMC receiver module switching frequency too high.
(2) channel search must begin scanning from lower frequency, needs the long time just can find lockable channel.
(3) Suo Ding the Real-time Traffic Information that channel provided may not be best.
Therefore, the channel switching efficiency that how to improve the TMC receiver module is a problem to be solved.
Description of drawings
Fig. 1 is the calcspar of the embodiment of guider of the present invention;
Fig. 2 is the synoptic diagram of the spatial relationship of RDS of the present invention base station and guider;
Fig. 3 is the calcspar of the spatial relationship of RDS of the present invention base station and travel route; And
Fig. 4 is the flow chart of steps of the embodiment of traffic information channel switching method of the present invention.
Summary of the invention
In view of this, purpose of the present invention is providing a kind of guider and traffic information channel switching method thereof exactly, with channel switching efficiency and the minimizing switching times that improves the TMC receiver module.
For achieving the above object, the present invention proposes a kind of guider, and it comprises a database, a processing module, a TMC receiver module, a location module, a navigation module.(Traffic Message Channel, information TMC), processing module are at least according in order to adjust the weight of these a little TMC, to produce a TMC priority list (ranking table) for several electronic charts of database storage and several Traffic Message Channels.The TMC receiver module is in order to receiving a TMC broadcast singal, and the TMC broadcast singal is decoded into TMC data.Locating module provides a positional information, and navigation module is in order to planning the route that travels, and according to this route that travels, positional information and TMC data so that a navigation information to be provided.Wherein, when the intensity that detects present TMC signal when the TMC receiver module was lower than a threshold value, then the TMC receiver module selected in the TMC priority list a more preferential Traffic Message Channel to lock since then.
In addition, the present invention more proposes a kind of traffic information channel switching method, is applicable to a guider, and this guider has a TMC receiver module and a processing module, and this method comprises the following step: several TMC information is provided; Use this processing module,, adjusting the weight of those TMC, and produce a TMC priority list according at least one ordering rule; When the intensity that detects a TMC signal when this TMC receiver module was lower than a threshold value, then this TMC receiver module selected a more preferential Traffic Message Channel to lock in this TMC priority list.
Compared to prior art, the invention provides a kind of guider and traffic information channel switching method thereof, effectively improve the channel switching efficiency of TMC receiver module and reduce switching times.
Now further understand and understanding for your juror is had technical characterictic of the present invention and the effect that reached, describe in detail below in conjunction with preferable enforcement.
Embodiment
Hereinafter with reference to correlative type, guider and traffic information channel switching method thereof according to preferred embodiment of the present invention are described, to be convenient to understand for making, the same components among the following embodiment illustrates with identical symbology.
See also Fig. 1, it is the calcspar of the embodiment of guider of the present invention.Among the figure, guider 1 comprises a database 10, a processing module 13, a TMC receiver module 14, a location module 15, a navigation module 16, a screen 101 and loudspeaker 102.Database 10 stores several Figure 11 and several Traffic Message Channels (Traffic Message Channel electronically, TMC) information 12, wherein, Figure 11 has frequency modulation appendix wave system system (Radio Data System electronically, RDS) base station location 19, and TMC information can comprise signal quality information and the paying information of this TMC.
TMC receiver module 14 is in order to receiving a TMC broadcast singal, and this TMC broadcast singal is decoded into TMC data 141.Locating module 15 provides a positional information 151.Locating module 15 is a GPS module preferably.Navigation module 16 basis Figure 11, user imported electronically starting point and destinations, route 161 travels, and navigation module 16 according to travel route 161, positional information 151 and TMC data 14 so that a navigation information 18 to be provided, the information of " junction ahead please turn left " or " this highway section speed limit is 30 kilometers of speed per hours; Please drive carefully " or the like for example, these navigation information 18 alternatives show by screen 101 or by loudspeaker 102 outputs with the prompting driver.Processing module 13 is according to an ordering rule (holding the back describes in detail), to produce a TMC priority list (ranking table) 131, and TMC receiver module 14 detects the intensity of TMC signal when being lower than a threshold value (threshold), then TMC receiver module 14 selects a more preferential Traffic Message Channel to lock, to continue to receive the TMC broadcast singal in TMC priority list 131.Guider 1 optionally can be provided with a TMC channel search module 17, in order to detect the signal intensity of these a little TMC in the process of moving.
Processing module 13 can be adjusted the weight of each TMC at least according to following four kinds of ordering rules, discharge the priority of these a little TMC again according to the weighted value of each TMC, to produce TMC priority list 131.Below describe four kinds of ordering rules in detail.
Ordering rule 1: generally speaking, need the quality of the TMC of paying can be higher than the TMC that need not pay, the quality of domain type TMC can be higher than whole district type TMC, so processing module 13 can be adjusted the weight of each TMC according to TMC data 141, TMC or the quality of will charging TMC preferably heightened its weight.
Ordering rule 2:TMC broadcast singal is sent by the RDS base station, therefore, the near more TMC broadcast singal that is then received is strong more from the base station, and the positional information 151 that processing module 13 can provide according to locating module 15 is judged each RDS base station location 19 and the distance between guider is far and near at present, its corresponding TMC heightens its weight with nearer RDS base station, as shown in Figure 2, RDS base station 22 is nearer from driver 20, and RDS base station 21 is far away from driver 20, therefore, the weight of RDS base station 22 is higher.
Ordering rule 3: because the TMC broadcast singal is subjected to the influence of context, therefore, processing module can be according to the spatial relationship between the position of this a little RDS base station and travel route, as the barrier state between RDS base station and travel route or ratio of RDS signal of base station scope covering travel route or the like, adjust the weight of the TMC of this a little RDS base station correspondence.As shown in Figure 3, among the figure, arrow indicates driver 30 travel route, though RDS base station 32 is nearer from travel route, yet many high constructures 331,332,333 and 334 are arranged, between RDS base station 32 and travel route though and RDS base station 31 is far away from travel route.But no obvious barrier between RDS base station 32 and travel route, the interference that the TMC broadcast singal that RDS base station 32 is sent is subjected to is less, and the interference that the TMC broadcast singal that RDS base station 31 is sent is subjected to is bigger.Therefore, can heighten the weight of RDS base station 32 pairing TMC, reduce the weight of RDS base station 31 pairing TMC.Similarly, also can heighten the weight that range of signal covers the higher pairing TMC in RDS base station of the ratio of travel route, reduce the weight that range of signal covers the lower pairing TMC in RDS base station of the ratio of travel route.
Ordering rule 4: if guider has configuration TMC channel search module 17, then processing module 13 can be adjusted the weight of these a little TMC according to the detecting result of TMC channel search module 17.
Processing module 13 can be adjusted the weight of each TMC according to the combination of above-mentioned four kinds of ordering rules, discharges the priority of these a little TMC again according to the weighted value of each TMC, to produce TMC priority list 131.And TMC priority list 131 is brought in constant renewal in the vehicle ' process.In one embodiment, if database 10 stores 4 TMC information (TMC_A, TMC_B, TMC_C and TMC_D), and 4 shared weight proportions of ordering rule are respectively 25%, 20%, 20% and 35%, and then according to above-mentioned 4 ordering rules, these 4 TMC sequences of information are as follows:
| Ordering rule 1 (25%) | Ordering rule 2 (20%) | Ordering rule 3 (20%) | Ordering rule 4 (35%) |
| TMC_A | TMC_B | TMC_A | TMC_B |
| TMC_B | TMC_C | TMC_B | TMC_D |
| TMC_D | TMC_D | TMC_C | TMC_A |
| TMC_C | TMC_A | TMC_D | TMC_C |
Ordering is that first weighted value is 0.4 under each rule, and ordering be second weighted value is 0.3, and ordering is that the 3rd weighted value is 0.2, and ordering be the 4th weighted value is 0.1.Can learn at last, the weight of TMC_A is 0.27 (0.27=0.4 * 0.25+0.1 * 0.2+0.4 * 0.2+0.3 * 0.35), the weight of TMC_B is 0.355 (0.355=0.3 * 0.25+0.4 * 0.2+0.3 * 0.2+0.4 * 0.35), the weight of TMC_C is 0.16 (0.16=0.1 * 0.25+0.3 * 0.2+0.2 * 0.2+0.1 * 0.35), and the weight of TMC_D is 0.215 (0.215=0.2 * 0.25+0.2 * 0.2+0.1 * 0.2+0.3 * 0.35), therefore can obtain TMC priority list 131, as shown in Table 1.When the intensity that detects the TMC signal when TMC receiver module 14 was lower than a threshold value (threshold), then TMC receiver module 14 was according to TMC priority list 131, earlier to TMC_B to lock, to continue to receive the TMC broadcast singal.By TMC priority list 131, can improve the channel switching efficiency of TMC receiver module.
| The TMC priority list |
| TMC_B |
| TMC_A |
| TMC_D |
| TMC_C |
Table one
See also Fig. 4, it is the flow chart of steps of the embodiment of traffic information channel switching method of the present invention, the guider that the method is corresponding shown in Figure 1.Among the figure, the method comprises the following step:
Step 40: according to these a little TMC data 141 these a little TMC are sorted, to produce first weight of each TMC;
Step 41: according to the spatial relationship of 161 of this a little RDS base station 19 and travel routes, 19 pairing TMC sort to this a little RDS base station, to produce second weight of each TMC;
Step 42: far and near with the distance of guider current position according to this a little RDS base station 19,19 pairing TMC sort to this a little RDS base station, to produce the 3rd weight of each TMC;
Step 43: the detecting result according to TMC channel search module 17 sorts to these a little TMC, to produce the 4th weight of each TMC;
Step 44: according to first weight, second weight, the 3rd weight and the 4th weight of each TMC, with total weight of calculating each TMC and produce a TMC priority list 131;
Step 45: when the intensity that detects the TMC signal when TMC receiver module 14 was lower than a threshold value, then TMC receiver module 14 selected a more preferential TMC to lock in this TMC priority list 131.
The above only is an illustrative, but not is restricted person.Anyly do not break away from spirit of the present invention and category, and, all should be contained in the accompanying claim its equivalent modifications of carrying out or change.
Claims (15)
1. a guider is characterized in that, this guider comprises:
One database stores several electronic charts and several Traffic Message Channels (Traffic MessageChannel, information TMC);
One TMC receiver module in order to receiving a TMC broadcast singal, and is decoded into TMC data with this TMC broadcast singal;
One processing module in order to adjusting the weight of those TMC, and produces a TMC priority list (rankingtable);
One location module provides a positional information; And
One navigation module, planning one route that travels, and according to this travel route, this positional information and this TMC data so that a navigation information to be provided;
Wherein, when the intensity that detects this TMC signal when this TMC receiver module was lower than a threshold value, then this TMC receiver module selected a more preferential Traffic Message Channel to lock in this TMC priority list.
2. guider according to claim 1 is characterized in that, the information of those Traffic Message Channels comprises a signal quality information and a paying information.
3. guider according to claim 1 is characterized in that, this electronic chart more comprises the pairing frequency modulation appendix of those TMC wave system system (Radio Data System, RDS) positional information of base station.
4. guider according to claim 3, it is characterized in that, this processing module is more according to the position of this RDS base station and the spatial relationship between this travel route, adjust the weight of those Traffic Message Channels, and this spatial relationship can be the barrier state between this RDS base station and this travel route, and this spatial relationship also can be the ratio that this RDS signal of base station scope covers this travel route.
5. guider according to claim 3 is characterized in that, this processing module is more far and near according to the distance between this RDS base station and present this guider, adjusts the weight of those TMC.
6. guider according to claim 1, it is characterized in that, more comprise a TMC channel search module, in order to detecting the signal intensity of those Traffic Message Channels, and this processing module is more adjusted the weight of those Traffic Message Channels in this TMC priority list according to the detecting result of this TMC channel search module.
7. guider according to claim 1 is characterized in that, this locating module is a GPS (GPS) module.
8. guider according to claim 1 is characterized in that, this guider is a portable electronic devices.
9. a traffic information channel switching method is applicable to a guider, and this guider has a TMC receiver module and a processing module, it is characterized in that, this method comprises the following step:
Several TMC information is provided;
Use this processing module,, adjusting the weight of those TMC, and produce a TMC priority list according at least one ordering rule;
When the intensity that detects a TMC signal when this TMC receiver module was lower than a threshold value, then this TMC receiver module selected a more preferential Traffic Message Channel to lock in this TMC priority list.
10. traffic information channel switching method according to claim 9 is characterized in that, those TMC information comprise a signal quality information and a paying information.
11. traffic information channel switching method according to claim 9 is characterized in that, more comprising provides the pairing frequency modulation appendix of those TMC wave system system (Radio Data System, RDS) positional information of base station.
12. traffic information channel switching method according to claim 11, it is characterized in that, this guider produces the route that travels, and this processing module is more according to the position of this RDS base station and the spatial relationship between this travel route, adjust the weight of those TMC, and this spatial relationship is the barrier state between this RDS base station and this travel route, and this spatial relationship also can be the ratio that this RDS signal of base station scope covers this travel route.
13. traffic information channel switching method according to claim 11 is characterized in that, this processing module is more far and near according to the distance between this RDS base station and present this guider, adjusts the weight of those TMC.
14. traffic information channel switching method according to claim 9, more comprise configuration one TMC channel search module in this guider, this TMC channel search module is in order to detecting the signal intensity of those TMC, and this processing module is more adjusted the weight of those TMC according to the detecting result of this TMC channel search module.
15. traffic information channel switching method according to claim 9 is characterized in that, this guider is a portable electronic devices.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100277616A CN101294813B (en) | 2007-04-28 | 2007-04-28 | Navigation device and traffic information channel switching method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100277616A CN101294813B (en) | 2007-04-28 | 2007-04-28 | Navigation device and traffic information channel switching method |
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| Publication Number | Publication Date |
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| CN101294813A true CN101294813A (en) | 2008-10-29 |
| CN101294813B CN101294813B (en) | 2013-02-13 |
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| CN2007100277616A Expired - Fee Related CN101294813B (en) | 2007-04-28 | 2007-04-28 | Navigation device and traffic information channel switching method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102467826A (en) * | 2010-11-09 | 2012-05-23 | 阿尔派株式会社 | Traffic information receiver and traffic information acquisition method |
| CN104160433A (en) * | 2012-02-24 | 2014-11-19 | 三菱电机株式会社 | Vehicle-mounted communication device and navigation device |
| CN112539754A (en) * | 2020-11-12 | 2021-03-23 | 武汉光庭信息技术股份有限公司 | RDS-TMC-based high-precision map and traditional map path matching method and device |
-
2007
- 2007-04-28 CN CN2007100277616A patent/CN101294813B/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102467826A (en) * | 2010-11-09 | 2012-05-23 | 阿尔派株式会社 | Traffic information receiver and traffic information acquisition method |
| CN102467826B (en) * | 2010-11-09 | 2016-05-25 | 阿尔派株式会社 | Traffic information receiver and traffic information acquisition method |
| CN104160433A (en) * | 2012-02-24 | 2014-11-19 | 三菱电机株式会社 | Vehicle-mounted communication device and navigation device |
| CN104160433B (en) * | 2012-02-24 | 2016-08-17 | 三菱电机株式会社 | Vehicular communication unit and guider |
| DE112012005932B4 (en) * | 2012-02-24 | 2020-08-13 | Mitsubishi Electric Corporation | Communication device and navigation device arranged in the vehicle |
| CN112539754A (en) * | 2020-11-12 | 2021-03-23 | 武汉光庭信息技术股份有限公司 | RDS-TMC-based high-precision map and traditional map path matching method and device |
| CN112539754B (en) * | 2020-11-12 | 2023-04-28 | 武汉光庭信息技术股份有限公司 | RDS-TMC-based high-precision map and traditional map path matching method and device |
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| CN101294813B (en) | 2013-02-13 |
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