CN101319912B - Client terminal and server terminal of navigation system, and map updating method - Google Patents
Client terminal and server terminal of navigation system, and map updating method Download PDFInfo
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- CN101319912B CN101319912B CN2008100682452A CN200810068245A CN101319912B CN 101319912 B CN101319912 B CN 101319912B CN 2008100682452 A CN2008100682452 A CN 2008100682452A CN 200810068245 A CN200810068245 A CN 200810068245A CN 101319912 B CN101319912 B CN 101319912B
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Abstract
The invention discloses a client terminal and a service terminal of a navigation system as well as a method for updating a map thereof; wherein, the method for the client terminal to ask for map updating includes the following steps of: transmitting an updating request and the updating state information which can reflect the current updating state of the map data of the client terminal to the service terminal; the client terminal receives a data packet returned by the service terminal, analyzes and updates the map data and the updating state information of the client terminal. The method for the service terminal to response the updating includes the following steps that: the service terminal receives the updating request and the updating state information transmitted by the client terminal, packets and transmits the updating request and the updating state information to the client terminal. In the updating process, as the client terminal transmits the updating state information which reflects the updating state of the client terminal to the service terminal, the service terminal confirms the content in this way and transmits the updating state information to the client terminal to update after being packaged which only needs communication for one time, the time for the updating of each time is obviously reduced.
Description
Technical field
The present invention relates to the GPS navigation field; In particular; The client, the service end that relate to a kind of navigational system, and the client of navigational system to service end request map method for updating, with the method for the renewal request of corresponding navigational system service end customer in response end.
Background technology
At present, (Global Positioning System GPS) is one of GPS navigation important application direction to automobile-used GPS.The gps antenna of automobile-used GPS navigation system receives from 3 data messages that transmitted in earth-circling 24 gps satellites at least; In conjunction with the electronic chart that is stored in the Vehicular navigation terminal; The position coordinates of confirming through gps satellite signal is complementary therewith, confirms the accurate position of navigation object in electronic chart.
Fig. 1 shows the structure of existing navigational system and forms:
Described navigational system comprises: loudspeaker 1, chuck assembly 2, input media 3, voice output 4, display device 5, control the control device 6 and the GPS receiving trap 16 that is connected with control device 6 of chuck assembly 2, input media 3 and voice output 4 respectively.
Described control device 6 is a microcomputer, as adopting palm PC, smart mobile phone, car-mounted terminal etc.It comprises: user interface control module 7, map data management module 8 and navigation module 9; Navigation module 9 is mainly by Navigation Control module 10, map display module 11, route guidance module 12, path searcher module 13, information point indexing unit 14, detection module 15 constitutes from the car position.
Chuck assembly 2 can be reduced into numerical data to the recorded content that inserts in the recording medium that records map datum, control program data etc. wherein, and delivers to and deliver to control device 6.Its recording medium for example can adopt safe digital card (Secure Digital Card, SD), flash card (TransFlash Card, TF) etc.
The voice data translation that voice output 4 is sent control device 6 here is a voice signal, delivers to loudspeaker 1.The voice signal that loudspeaker 1 is sent voice output 4 here converts sound and output to, and like this, loudspeaker 1 just can cooperate the needs of control device 6, sends the voice of various operational notifications and route guidance.
The signal that GPS receiving trap 16 receives from gps satellite; Detect the present position and the moving direction of vehicle; And converting detected result to protocol data, these protocol datas further are sent to the detection module 15 from the car position in the navigation module 9 of control device 6.
The user interface control module 7 of control device 6 receives the input of input media 3, generates and the desired content control instruction corresponding of input, delivers among the one or more submodules in the navigation module 9.In addition, user interface control module 7 response steering orders, and the result of returning from navigation module 9, deliver among voice output 4, the display device 5.
The requirement of the map data management module 8 response navigation modules 9 of control device 6 is read map datum from chuck assembly 2, also contains the data content that is useful on picture guiding usefulness in these map datums.
All the other submodules of navigation module 9 are controlled and called to the Navigation Control module 10 of navigation module 9.
The map display module 11 of navigation module 9 generates the video data that map shows usefulness according to the map data information of reading from map data management module 8, delivers to user interface control module 7.
The route guidance module 12 of navigation module 9 obtains map datum from map data management module 8, it is carried out the path induce processing, and inducing result to return to map data management module 8, read so that map data management module 8 is predicted.Data such as the interface in the time of also will inducing in addition, navigation speech send user interface control module 7 to.
The path searcher module 13 of navigation module 9 obtains map datum from map data management module 8, and processing is directly explored in walking along the street in fact, and with track search return path bootstrap module 12 as a result.
The detection module 15 from the car position of navigation module 9 will be delivered to map data management module 8, map display module 11, route guidance module 12 from the data of the expression present position that GPS receiving trap 16 obtains.
State Intellectual Property Office of the People's Republic of China was patent application document " electronic map data storage and method for updating " (open day: on 01 26th, 2005, publication number: CN1570565A, application number: 200410018119.8; Below be referred to as patent documentation 1) in; Disclose a kind of electronic map data storage and method for updating, may further comprise the steps:
A), confirm the ID of map elements to the coding of the map elements in the electronic map data;
B) according to the map key element ID with the data storage that concerns between map elements and the map elements corresponding memory block in the cartographic information memory storage of map datum service end;
C) data that from the cartographic information memory storage of map datum service end, concern between one of extraction or multinomial map elements and the map elements, and obtain relevant map elements ID and update mode thereof;
Wherein, said electronic map data storage is further comprising the steps of with update method:
D) the map datum service end utilizes communication network with map elements ID and update mode thereof that step c extracts, is transferred to the map datum application end;
Map elements ID and update mode thereof in the map elements ID and update mode thereof that e) will obtain through steps d and the cartographic information memory storage that is stored in said map datum application end compare;
F) choose the map elements ID that needs upgrade according to the comparative result of step e, the map elements ID that utilizes communication network to upgrade is transferred to the map datum service end;
G) in the map datum service end, the map elements ID that obtains according to step f, selection needs data updated the data that concern between map elements that extracts from step c and the map elements, is transferred to the map datum application end;
H) corresponding memory block in the cartographic information memory storage that data that concern between key element ID map elements that step g is obtained and the map elements according to the map and update mode thereof store the map datum application end into.
In the patent documentation 1,, only upgrade, need the data updated flow, therefore adopt map elements to do the minimal communications unit that upgrades with minimizing to different map elementses for the difference of the map of the map that can find out client and service end.But because the granularity of each map elements is too little; And the quantity of the map elements that need change usually is too many; This just makes actual the execution when upgrading again, need communicate by letter with service end repeatedly in order to confirm map elements, and the network traffics that to upgrade required network traffics, consumed time when confirming new range more required, expending time in to differ does not have oneself; Great amount of time spends on the map elements of confirming to need to upgrade, and causes waste of network resources.
In common map of navigation electronic data structure; Map elements ID can be sub-divided into each POI information point, road, information such as link; So; Which map elements request is the update mode information of the update mode that can reflect the service end map datum of downloading earlier map elementses such as point of interest, road, link from service end need upgrade to confirm client to client, further carry out the actual renewal operation of each map elements again; Because the quantity of map elements is very big, the update mode information of this download service end map and the definite map elements process that will upgrade will be very consuming time.In addition, because the update mode information of the map elements of small grain size will download to this locality earlier, compare; Ask for to service end again the map elements that upgrades has taken place; Like this, after the lastest imformation with the map elements ID of server end downloaded to this locality, the map elements of server end may produce new renewal; Just possibly cause the local lastest imformation and the nonsynchronous problem of lastest imformation of server end of downloading to; Keep service end map elements and client downloads map elements ID lastest imformation fully synchronously, its required development technique is complicated unusually, therefore the strong property of the key of application becomes fragile.
And because map elements information granularities such as POI, road, link are very little, quantity is very many again, and the response speed of wireless network is generally not good now; For example; In the GPRS transmission mode, response speed generally needed more than 2 seconds, so in the processing procedure that the concrete renewal of affirmation update mode, execution is again and again operated; Needed time consumption is very large, has brought inconvenience for user's use.
Summary of the invention
For overcoming above-mentioned defective; Technical matters to be solved by this invention provides a kind ofly upgrades client, the service end of short navigational system consuming time, and the client of navigational system to service end request map method for updating, with the method for the renewal request of corresponding navigational system service end customer in response end.
The objective of the invention is to realize through following technical scheme:
A kind of client of navigational system comprises:
Client map datum memory module is used to store the map elements data of client, and said client data memory module also stores the update mode information of the update mode that can reflect that the client map datum is current;
The client data sending module is used for renewal request and update mode information are sent to service end;
The client data receiver module is used to receive the packet that service end is sent;
Packet is resolved update module, is used for the packet that the client data receiver module obtains is resolved, and has obtained taking place in the service end map elements data of upgrading; And according to map elements data and update mode information in this map factor data renewal client map datum memory module.
A kind of service end of navigational system comprises:
The service end data reception module is used to receive renewal request and the update mode information that client is sent;
Service end map datum memory module is used for the storage map elements data of service end, and said each map elements data all are provided with the update mode information parameter;
Map elements Data Matching module is used for searching in service end map datum memory module the map elements data of the update mode information matches of the client that receives with the client receiver module;
The service end data transmission blocks sends to client after the map elements packing data that is used for map elements Data Matching module was collected.
A kind of client of above-mentioned navigational system may further comprise the steps to service end request map method for updating:
A: client is sent the update mode information of asking and can reflect the update mode that the client map datum is current of upgrading to service end;
B: client receives the packet that service end is returned, and it is resolved, and has obtained taking place in the service end map elements data of upgrading, and factor data upgrades the map datum and the update mode information of client according to the map.
Be provided with total update time of the parameter of the last total final updating time of client of the map datum that is used to preserve client in the described client;
In the described steps A, update mode information is total final updating time of client of preserving in the parameter total update time;
Behind the described step B, also comprise the value in the total update time parameter is arranged to the step that the response of service end is worth constantly.This is first kind of more new model.
The map datum of described client comprises corresponding, that the be positioned at different figure layers map sheet more than a group with service end, and said map elements data are documented in respectively in the different map sheets; Wherein, each map sheet is respectively equipped with map sheet parameter update time of the final updating time that is used to preserve this map sheet;
In the described steps A, update mode information is total final updating time of client of preserving in the parameter total update time;
Behind the described step B, comprise that also the response that the value in the total update time parameter is arranged to service end is worth constantly; And the value in map sheet parameter update time of all map sheets is arranged to the step that the response of service end is worth constantly.
The map datum of described client comprises corresponding, that the be positioned at different figure layers map sheet more than a group with service end, and said map elements data are documented in respectively in the different map sheets; Wherein, each map sheet is respectively equipped with map sheet parameter update time of the final updating time that is used to preserve this map sheet;
In the described steps A, the final updating time of the map sheet of preserving in map sheet parameter update time of update mode information for the appointment map sheet;
Behind the described step B, also comprise the value in map sheet parameter update time of corresponding map sheet is arranged to the step that the response of service end is worth constantly.
Also be provided with the vehicle-surroundings update module in the described client, be used for obtaining some or several map sheets on the one or more figure layers of being positioned at of current vehicle position periphery as the appointment map sheet of update mode information.The content of the map sheet of vehicle-surroundings is only upgraded in such design, has reduced unnecessary renewal, has accelerated renewal speed.
Be provided with in the described client and preserved the area update module of zone with the corresponding relation of map sheet, wherein, the corresponding respectively area update time parameter that is useful on the final updating time of preserving current region in each zone;
In the described steps A, the final updating time of the map sheet of preserving in map sheet parameter update time of update mode information for the corresponding map sheet in appointed area that obtains according to the area update module; Or be final updating time in the zone of preserving in the area update time parameter of appointed area;
Behind the described step B, also comprise the value in map sheet parameter update time of corresponding map sheet is arranged to the step that the response of service end is worth constantly; Or the value in the area update time parameter of corresponding region is arranged to the step that the response of service end is worth constantly.This comprises two kinds of situation, a kind of be in client according to the corresponding map sheet of regional search, the information of map sheet is sent to the situation of service end, another kind is that the information with the zone sends to service end, according to the corresponding map sheet of regional search, carries out more news in service end.
A kind of method of renewal request of service end customer in response end of navigational system may further comprise the steps:
C: service end receives renewal request and the update mode information that client is sent;
D: in the map datum of service end, search the map elements data that all its update mode parameters have satisfied the update mode information among the step C, send to client after the packing.
Each map elements data of described service end are all corresponding is provided with parameter update time that is used to put down in writing its final updating time;
Among the described step D, if update mode information is total final updating time of client, its all final updating time in the service end of searching is later than the map elements data of total update time of client, sends to client after the packing.
The map datum of described service end comprises corresponding, that the be positioned at different figure layers map sheet more than a group with client, and said map elements data are documented in respectively in the different map sheets; Wherein, each map sheet is respectively equipped with map sheet parameter update time of the final updating time that is used to preserve this map sheet;
Among the described step D,, then carry out following steps if update mode information is total final updating time of client:
D01: relatively whether the final updating time of the corresponding map sheet of service end is later than total final updating time of client; If; In current map sheet, searching its all final updating time is later than the map elements data of the total final updating of client time, sends to client after the packing; Change step D02, if not, step D02 directly changeed;
D02: more next map sheet, execution in step D01 relatively accomplishes until all map sheets again.This can be applicable to first kind of pattern.
The map datum of described service end comprises corresponding, that the be positioned at different figure layers map sheet more than a group with client, and said map elements data are documented in respectively in the different map sheets; Wherein, each map sheet is respectively equipped with map sheet parameter update time of the final updating time that is used to preserve this map sheet;
Among the described step D; If update mode information is the final updating time that client is specified map sheet; Then relatively whether the final updating time of the corresponding map sheet of service end is later than the final updating time that client is specified map sheet; If, in current map sheet, search its all final updating time to be later than the map elements data that client is specified the final updating time of map sheet, send to client after the packing; If not the notice client need not upgraded.This can be applicable to the third pattern.As minimum updating block, client can only ask some or several map sheets of appointment independently to be upgraded with map sheet in the present invention, and speed is faster, and more convenient user uses.
Be provided with in the described service end and preserved the regional sub-update module of zone with the corresponding relation of map sheet, wherein, the corresponding respectively area update time parameter that is useful on the final updating time of preserving current region in each zone;
Among the described step D,, then may further comprise the steps if update mode information is the final updating time of client appointed area:
D11: in the area update submodule, search and obtain the corresponding map sheet in appointed area;
D12: whether the final updating time of the map sheet that obtains among the comparison step D11 is later than the final updating time of client appointed area; If; In current map sheet, searching its all final updating time is later than the map elements data that client is specified the final updating time of map sheet, sends to client after the packing; If not the notice client need not upgraded.This is second kind of pattern.
Because in renewal process; Send the update mode information can reflect the update mode that the client map datum is current by client to service end, service end confirms in the service end that according to update mode information it is to upgrade that which content is compared with client, with after updated information has taken place in the service end packing; The disposable client that sends to; After the client parsing, according to the map datum of above-mentioned information updating client, therefore; Only need carry out once mutual communicating by letter between client and the service end and get final product, obviously reduce the time of the each renewal of client.
Description of drawings
Fig. 1 is the structural representation of navigational system in the prior art;
Fig. 2 is in the embodiment of the invention, the electronic map data graphic layer structure of service end and client and the structural representation that on the figure layer, carries out the map sheet division;
Fig. 3 is in the embodiment of the invention, and the electronic map data layering reaches on the figure layer and carries out the data structure synoptic diagram that map sheet is divided in service end and the client;
Fig. 4 is the map sheet data organizational structure synoptic diagram of the map datum of client in the embodiment of the invention;
Fig. 5 is the data structure synoptic diagram of service end map sheet in the embodiment of the invention;
Fig. 6 is the data structure synoptic diagram of the map sheet road data collection of service end in the embodiment of the invention;
Fig. 7 is the packing form synoptic diagram that service end is sent data in the embodiment of the invention to client;
Fig. 8 is the structural representation of the client and the service end of navigational system in the embodiment of the invention;
Fig. 9 is the processing flow chart that client is upgraded to service end request map in the embodiment of the invention;
Figure 10 is the renewal processing of request process flow diagram of service end customer in response end in the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment the present invention is described further.
Invention thinking of the present invention is: send the update mode information that can reflect the update mode that the client map datum is current to service end by client; When confirming that according to update mode information those contents are compared with client in the service end, service end upgraded; Only with after the information package that increases, deletes, changes that has taken place in the service end to upgrade, the disposable client that sends to is after the client parsing; Map datum according to above-mentioned information updating client; Therefore, only need carry out once mutual communicating by letter between client and the service end and get final product, obviously reduce the time of the each renewal of client.
On principle; Client only needs when request is upgraded, to send the update mode information (update time the last like client) that can reflect the update mode that the client map datum is current; Service end can be according to this update mode information searching; Think that having satisfied with this update mode information is client needs data updated (as can all having been carried out data updated as the data that satisfied update condition after the update time of client-requested) as the data of update condition; According to certain form packing, the disposable client that sends to gets final product with all data that satisfy this update condition.
Because the map datum in the navigational system all is scheme layer and the formal representation of map sheet; And the user is when using the client of navigational system; The map that possibly only need a certain very little subregion; The map that but might not need All Ranges, therefore, the operation of updating map data can map sheet be that unit handles.
As shown in Figure 2, all there are the on all four electronic map data graphic layer structure of structure in service end and client and on the figure layer, carry out the structure that map sheet is divided.As shown in the figure, the map sheet unit coverage of ground floor is maximum, engineer's scale minimum (for example map sheet size 500kmX500km, engineer's scale 1/1000km); The map sheet unit coverage of the second layer is more a little bit smaller, and engineer's scale also will be more greatly; The map sheet unit coverage of last one deck is minimum, engineer's scale maximum (for example map sheet size 5kmX5km, engineer's scale 1/25m).
Wherein, electronic map data layering and on figure layer, to carry out the data structure organization that map sheet divides as shown in Figure 3 in service end and the client.
The map sheet data organizational structure of the map datum of client is as shown in Figure 4, and wherein, each map sheet all is respectively equipped with parameter update time of the final updating time that is used to preserve current map sheet.
In the map datum of client; Also be provided with total update time of the parameter that is used to preserve total final updating time of client; Data set parameter update time of the final updating time of this data set of preservation that is provided with in map sheet parameter update time of the final updating time of this map sheet of preservation that is provided with in the map sheet data structure and the data set data structure.
But in the map sheet data structure of service end; In order to be fit to the needs of online updating; Map sheet self is provided with map sheet parameter update time of the final updating time of preserving this map sheet, and each data set, and the data item of data centralization also be respectively equipped with data set parameter update time and the data item update time parameter of the final updating time that is used to preserve itself.The final updating time of the map sheet of wherein, preserving in map sheet parameter update time is the person at the latest of the final updating time of each data set in the current map sheet itself; The final updating time of the data set of preserving in data set parameter update time of each data set then is the person at the latest of the update time of each data item.
Fig. 5 shows the data structure of the service end map sheet of present embodiment.Wherein, the figure layer of different proportion chi is preserved different data acquisitions respectively, as, all peripheral interest point data set only are kept in some figure layers, and other layer do not have this peripheral interest point data set.Fig. 6 shows the data structure of the map sheet road data collection of present embodiment service end; Other service end data set such as face of land data set; Periphery interest point data collection; The information point text data set also similarly, each data subitem all has the update time of data item, deleted marker whether, does not enumerate its synoptic diagram one by one at this.
The implication and the purposes of each noun that wherein, occurs among Fig. 5, Fig. 6 are following:
Data item: be the map elements data of each data centralization in the map sheet, road and the node thereof concentrated of road data for example, face of land shape and node thereof in the data of the face of land, the point of interest in the peripheral interest point data, the text icon in the information point text data etc.Each map factor data item has the sign ID of oneself, client and service end find map elements through the sign ID of data item just, safeguards its update mode with contrast.
The data item update time: the update time of each map factor data item of each data centralization, promptly this data item adds for the last time, revises or the moment when deleting.
Whether data item deleted marker: the sign that data item has been deleted.
The update time of data set: the time of data item update behavior takes place in data centralization for the last time.The update time that each data set all has, road data update time in the accompanying drawing 5 for example, face of land Data Update time, peripheral point of interest update time, information point text data update time.
Map sheet update time: the time of data item update behavior takes place in each data centralization for the last time, i.e. road data update time, face of land Data Update time, peripheral point of interest update time, at the latest person of information point text data in update time.
Client of the present invention require to be upgraded the method for response data to service end can a variety of patterns, as:
One, is all possible the Updating Information of request;
Two, be all possible the Updating Information in the range of requests zone by the zone;
Three, only specify some or several map sheet requests to specifying Updating Information of map sheet, as only asking to upgrade near the data of one or several map sheet that belongs to the current vehicle position;
Four, only specify some or several data set request to the Updating Information of specific data collection, like the data of data set of certain point of interest of having upgraded record in certain map sheet of request only.
Wherein, Jiu Shi total total update time of the parameter that is used to preserve the final updating time that in the map datum of client, is provided with of first kind of pattern utilization.
Client is sent this to service end and is upgraded the request mode, and encloses total final updating time of client.So-called total final updating time, i.e. last time in the intact moment of update mode for the first time of client successful execution.After service end receives first kind of update mode request of client; Total final updating time of sending simultaneously according to client; With the map sheet final updating time ratio of each map sheet in each layer of service end; Want new if find total final updating time of the final updating time ratio client of service end map sheet, then service end is more further to comparing the update time of each data set of this map sheet and total final updating time of client, if find that the update time of certain data set is newer than total final updating time of client; Gather packing to those data item newer of this data centralization again, return to client than total final updating time of client.Its packing form is as shown in Figure 7.
Second kind of pattern need client or with service end in the table of comparisons of each map sheet in administrative region and each figure layer is set respectively; Or the while is provided with on all four administrative region in client and service end and each schemes the table of comparisons of each map sheet in the layer, as having preserved the area update module of zone with the corresponding relation of map sheet.Please refer to following table table 1 and table 2: table 1 is the data relationship tree list of zone with the father zone; Show the membership of the superior and the subordinate between each administrative region; Go the minimum district one-level that arrives; Wherein, each zone is respectively equipped with the area update time parameter, is used to preserve the final updating time of current region.Table 2 is the overlapping relation table of each map sheet in district level-1 area and each figure layer in the zone tree, as long as related to certain zone in the current map sheet, this map sheet that is about in this figure layer is related with area identification, writes table 2.For example, if inquire for Xuanwu District, Beijing all map sheets that intersect on figure layer 1, only needing in table 2, be area identification " Xuanwu District sign ", and the figure layer gets final product for the map sheet of all records of " scheme layer 1 " extracts.
Table 1:
| Father's area identification | Area identification | Zone name | The final updating time | |
| Whole nation sign | Beijing's sign | Beijing | Time 1 | |
| Beijing's sign | The Xuanwu District sign | The | Time | 2 |
| Whole nation sign | Guangdong Province's sign | | Time | 3 |
| Guangdong Province's sign | Shenzhen's sign | The | Time | 4 |
| Shenzhen's sign | The Luohu District sign | The | Time | 5 |
| … | … | … | … |
Table 2:
| Area identification | The figure layer | Map sheet | |
| The Xuanwu District sign | Figure layer 1 | Map sheet 1-o | |
| The Xuanwu District sign | Figure layer 1 | Map sheet 1-p | |
| The Xuanwu District | Figure layer | 2 | Map sheet 2-o |
| The Luohu District sign | Figure layer 1 | Map sheet 1-o | |
| The Luohu District sign | Figure layer 1 | Map sheet 1-p | |
| The Luohu District | Figure layer | 2 | Map sheet 1-o |
| The Luohu District | Figure layer | 2 | Map sheet 1-p |
| The Luohu District | Figure layer | 3 | Map sheet 3-o |
| … | … | … |
Client is sent this to service end and is upgraded request mode, and encloses final updating time of preserving in sign and this regional area update time parameter in zone as update mode information.After service end received request, whether the final updating time of preserving in earlier relatively should the area update time parameter in zone in service end was newer than the final updating time that client transmits; If; Then all map sheets in this zone are enumerated; Use is identical processing mode in first kind of pattern; Need data updated up to finding out all, the new data item of final updating time of the current region that the final updating time ratio client of all its map sheets is sent uses the form of accompanying drawing 7 to pack, and returns to client; If not, then directly returning does not need updated information to give client.With first kind of mode treatment according to be total final updating asynchronism(-nization) be that the processing of second kind of pattern is according to being the area update time.
What the third mode request was upgraded is near the some or several map sheets the current vehicle position.Client is calculated the place map sheet of current vehicle location on each layer, sends this to service end to service end and upgrades the request mode, and enclose the map sheet sign and various parameter update time of each map sheet of its some or several map sheets that need upgrade.Use is identical processing mode in first kind of pattern, needs data updated up to finding out all, and uses the form of accompanying drawing 7 to pack, and returns to client.
The 4th kind of mode request upgraded is the some or several data sets in the map sheet of certain appointment.Client is sent this to service end and is upgraded request mode, and encloses data set update time of preserving in data set parameter update time of this map sheet as update mode information.After service end receives request; The data set whether the final updating time of in service end, relatively preserving in data set parameter update time of this data set earlier sends than client is new update time; If; Then all data item in this data set are enumerated, used identical processing mode in first kind of pattern, need data updated up to finding out all; Use the form of accompanying drawing 7 to pack data set new data item update time that the final updating time ratio client of all its data item is sent, return to client; If not, then directly returning does not need updated information to give client.Different with above-mentioned mode treatment is that the processing foundation of the 4th kind of pattern is data set update time.
Wherein, Carrying out first kind of more new model, promptly Updating Information when upgrading to all possible, following situation may occur: promptly some map sheet of client is recent renewal; And some map sheet is less than upgrading; And possibly be that the map sheet of the map sheet upgraded than that part is compared more morning update time in total final updating time of preserving in the parameter total update time, at this moment, as if only sending total final updating time as update mode information; Service end can also be packed the related data of those map sheets of upgrading in the client and sent to client, has produced the waste of flow.In order to address this problem; Can be when service end be sent the request of renewal and update mode information in client; Update mode information not only comprises total final updating time, comprises that also all its map sheets in the client are later than map sheet and the map sheet update time thereof of total final updating time update time; Service end is when receiving above-mentioned update mode information; For the map sheet of in update mode information, not mentioning; Only compare the map sheet update time of service end and total final updating time that client is sent, its map sheet of packaged service end is later than the map sheet of total final updating time of client update time; For the map sheet of in update mode information, mentioning, relatively the map sheet update time of service end and the map sheet update time of the corresponding map sheet that client is sent,, then this map sheet is added the data of packing if the map sheet of service end is upgraded update time; Otherwise, think that this map sheet for up-to-date, need not to upgrade.
In like manner; Carrying out more new model of first kind, second kind or the third; When promptly map sheet being upgraded; Also possibly produce some or several data sets is newly to upgrade, and the map sheet of in map sheet parameter update time, preserving possibly to be update time the data set of the data set that upgraded than that part compare more morning update time.Equally; Can be when service end be sent the request of renewal and update mode information in client; Update mode information not only comprises the map sheet update time of specifying map sheet, comprises that also all its data set in this map sheet is later than data set and the data set update time thereof of map sheet update time update time; Service end is when receiving above-mentioned update mode information; For the data set of not mentioning in update mode information; Map sheet update time of the data set update time of service end and client transmission relatively only, its data set of packaged service end is later than the map sheet of map sheet update time of client update time; For the data set of in update mode information, mentioning, relatively the data set update time of service end and the data set update time of the corresponding data collection that client is sent,, then this data set is added the data of packing if the data set of service end upgrades update time; Otherwise, think that this data set for upgrading, need not to upgrade.
Wherein, as shown in Figure 7, need the content of data updated to pack in proper order according to following form:
Service end response constantly, the update content of the update content of the quantity of the figure layer that relates to, figure layer 1, the map sheet quantity to be updated in the figure layer 1, other figure layers; Wherein, the update content of figure layer 1 comprises: the update content of map sheet 1 and the update content of other map sheets; The update content of map sheet 1 comprise update content in the data set 1 (as, the data set 1 shown in the figure is the road data collection), the update content of other data centralizations; The update content of data set 1 comprises the list of data items that will revise or add and the list of data items that will delete; The said list of data items that will revise or add comprises the list of data items number that will revise or add, and data item identifier that relates to and corresponding data item; The said list of data items that will delete comprises the list of data items number that will delete and the data item identifier that relates to thereof.
In above-mentioned four kinds of patterns; Client receives after the packet that returns; It is resolved, obtains the corresponding map factor data, according to this data pin to the data in the corresponding map sheet increase newly, renewal or deletion action; Upgrade corresponding data set parameter update time, map sheet parameter update time, area update time parameter simultaneously, total isoparametric value of parameter update time.
The client of navigational system of the present invention, as shown in Figure 8, comprising:
Client map datum memory module is used to store the map elements data of client, and said client data memory module also stores the update mode information of the update mode that can reflect that the client map datum is current;
The client data sending module is used for renewal request and update mode information are sent to service end;
The client data receiver module is used to receive the packet that service end is sent;
Packet is resolved update module, is used for the packet that the client data receiver module obtains is resolved, and has obtained taking place in the service end map elements data of upgrading; And according to map elements data and corresponding update mode information in this map factor data renewal client map datum memory module.
Comprise corresponding, that the be positioned at different figure layers map sheet more than a group with service end in the client map datum memory module, said map elements data are documented in respectively in the different map sheets; Wherein, each map sheet is respectively equipped with map sheet parameter update time of the final updating time that is used to preserve this map sheet;
Also be provided with the vehicle-surroundings update module in the client of described navigational system, be used for obtaining some or several map sheets on the one or more figure layers of being positioned at of current vehicle position periphery as the appointment map sheet of update mode information;
The area update module is used for the corresponding relation (shown in table 1, table 2) of storage area and map sheet, wherein, and the corresponding respectively area update time parameter that is useful on the final updating time of preserving current region in each zone.
Wherein, described update mode information can be for being kept at the total final updating of the client time in client total update time of the parameter; Corresponding, packet is resolved after update module accomplishes the map elements Data Update, also need be that the response of service end is worth constantly with the update mode information updating in the total update time parameter; The response of simultaneously value in map sheet parameter update time of all map sheets being arranged to service end is worth constantly;
The final updating time of the map sheet that described update mode information is preserved in can map sheet parameter update time for the appointment map sheet that is kept at client; Corresponding, after packet was resolved update module completion map elements Data Update, the response that also needs the value in map sheet parameter update time of above-mentioned map sheet to be arranged to service end was worth constantly;
The final updating time of the data set that described update mode information is preserved in can data set parameter update time for the specific data collection that is kept at client; Corresponding, after packet was resolved update module completion map elements Data Update, the response that also needs the value in data set parameter update time of above-mentioned data set to be arranged to service end was worth constantly;
The final updating time in the zone that described update mode information is preserved in can also the area update time parameter for the appointed area that is kept at client; Corresponding, after packet was resolved update module completion map elements Data Update, the response that also needs the value in above-mentioned zone parameter update time to be arranged to service end was worth constantly.
The service end of navigational system of the present invention, as shown in Figure 8, comprising:
The service end data reception module is used to receive renewal request and the update mode information that client is sent;
Service end map datum memory module is used for the storage map elements data of service end, and said each map elements data all are provided with the update mode information parameter;
Map elements Data Matching module is used for searching in service end map datum memory module the map elements data of the update mode information matches of the client that receives with the client receiver module;
The service end data transmission blocks, the information that is used for map elements Data Matching module is sent is packed according to preset form, sends to client; If the information that middle map elements Data Matching module is sent is empty information, the notice client need not upgraded.
Comprise corresponding, that the be positioned at different figure layers map sheet more than a group with client in the service end map datum memory module, said map elements data are documented in respectively in the different map sheets; Wherein, each map sheet is respectively equipped with map sheet parameter update time of the final updating time that is used to preserve this map sheet.
Said map elements Data Matching module comprises following submodule:
Total updating submodule is when update mode information is that the total final updating of client was worked during the time; Being used in the service end its all final updating time is later than the map elements data of total update time of client and sends to the service end data transmission blocks; Or whether the final updating time that is used for its map sheet that server is all is later than the map elements data that its final updating times in the client map sheet of total final updating time, all are later than total final updating time of client and sends to the service end data transmission blocks;
Specify the map sheet updating submodule, when update mode information is that client specifies the final updating of map sheet to work during the time; Whether the final updating time that is used for the corresponding map sheet of comparison service end is later than the final updating time that client is specified map sheet; If in current map sheet, search its all final updating time to be later than client and to specify the map elements data of the final updating time of map sheet to send to the service end data transmission blocks; If not, return sky information and give the service end data transmission blocks;
Specific data collection updating submodule is when update mode information is that the final updating of client specific data collection was worked during the time; Whether the final updating time that is used for comparison service end corresponding data collection is later than the final updating time of client specific data collection; If in current data set, search its all final updating time to be later than the map elements data of the final updating time of client specific data collection and to send to the service end data transmission blocks; If not, return sky information and give the service end data transmission blocks;
The area update submodule is when update mode information is that the final updating of client appointed area was worked during the time; It preserves the corresponding relation (shown in table 1, table 2) of zone and map sheet, wherein, and the corresponding respectively area update time parameter that is useful on the final updating time of preserving current region in each zone; Be used for inquiry and obtain the corresponding map sheet in appointed area; Relatively whether the final updating time of the map sheet of service end is later than the final updating time of client appointed area; If in current map sheet, search its all final updating time to be later than client and to specify the map elements data of the final updating time of map sheet to send to the service end data transmission blocks; If not, return sky information and give the service end data transmission blocks.
As shown in Figure 9, the client of navigational system is following to the treatment scheme that service end request map upgrades:
Step S101, client send to be upgraded request to service end, can send renewal request pattern respectively according to foregoing three kinds of different patterns, and the update mode information of the current update mode of corresponding reflected client map datum;
Step S102, client receives the response data packet that service end is returned, and according to predefined protocol rule response data packet is resolved, and obtains having taken place in the service end data updated;
Whether step S103 is that unit upgrades the data of client successively with the map sheet, also have map sheet not handle in the data that obtain among the determining step S102; In this way, execution in step S104, otherwise execution in step S109;
Step S104, is not the data set that in the pre-treatment map sheet, whether also has among the determining step S103 processed? In this way, execution in step S105, otherwise execution in step S107;
Step S105, does the current deal with data among the determining step S104 is concentrated also have data item not to be processed? In this way, execution in step S106, otherwise execution in step S104;
Step S106, client process data item update or deleted data item; If the indication of the data item in the response data packet is deleted, then client judges whether also to exist the data item of identical data sign, in this way, then carries out deletion; If the data item in the response data packet has partial data, then client judges whether to exist corresponding with it data item, in this way, carries out and upgrades operation, increases operation otherwise carry out; Return S105 after this step is complete;
Step S107, the value of upgrading map sheet parameter update time of map sheet is that the response of service end is worth constantly;
Step S108, client judges whether need to upgrade the value of the area update time parameter in zone, judges promptly whether the request that client is sent in step S101 is the area update request, in this way, execution in step S109 then, otherwise execution in step S110;
Step S109 upgrades the value of the area update time parameter in zone, is about to the value of area update time parameter that institute ask regional and all subregions of renewal and is arranged to the response of service end and is worth constantly, finishes this treatment scheme;
Step S110, client judge whether need to upgrade map total update time parameter value, judge that promptly renewal request that client sends is whether with first kind of new model---update all more in step S101; If judge and set up, execution in step S111, otherwise finish this treatment scheme;
Step S111 upgrades the value of total update time of parameter, and the response that the value that is about to total update time of parameter is arranged to service end is worth constantly, finishes this treatment scheme.
Shown in figure 10, the renewal processing of request flow process of service end customer in response end is following:
Step S201, service end receives the renewal request of client; Parsing obtains the renewal request pattern and the subsidiary update mode information of client;
Step S202 judges whether the renewal request pattern of client is first kind of pattern, promptly asks all possible Updating Information; In this way, explain that then the update mode information that receives among the S201 is total final updating time of client, execution in step S203, otherwise execution in step S204;
Step S203 packs all contents that taken place to upgrade in the map sheet of the total update time that is later than client in whole map sheets those update times according to predefined protocol rule, return to client;
Step S204 judges whether the renewal request pattern of client is second kind of pattern, i.e. area update request; In this way, explain that then the update mode information that receives among the S201 is the final updating time in the zone of client, execution in step S205; Otherwise, explain that then the renewal request pattern of client is the third pattern, promptly specify the renewal request of map sheet; The update mode information that receives among the S201 is the final updating time of corresponding map sheet in the client, execution in step S206;
Step S205 packs all contents that taken place to upgrade in the map sheet of the area update time that is later than client in all map sheets of asking the zone those update times according to predefined protocol rule, return to client;
Step S206 is later than those update times in the map sheet of update time of corresponding map sheet of client all contents that taken place to upgrade and packs according to predefined protocol rule, returns to client.
Wherein, After having confirmed to be later than the update time of client-requested update time in the map sheet; The content of upgrading has taken place in all in the map sheet in order to search; Can be earlier the value of data set parameter update time that whether is later than data set in the map sheet update time of client-requested relatively successively, if in current data set, search its all final updating time to be later than the map elements data that client is specified the final updating time of map sheet; If not, more next data set, data sets all in current map sheet are all relatively accomplished, and all map elements data that find are packed according to preset form, send to client.
Compare described in the patent documentation 1 is that minimal communications unit carries out the Treatment Technology scheme with fine-grained map elements; All data of the disposable transmission client-requested of the service end of technical scheme of the present invention; Can significantly reduce back and forth mutual number of times, thereby avoid because the slack-off problem of the speed that double factor brought that the response speed of wireless communication networks is slow and interaction times is many.Because the present invention is directly with the update mode information uploading of client, and need not download the update mode of map elements from service end, therefore, having reduced needs data quantity transmitted and number of communications, can improve renewal speed further.
Further, the present invention can only need contrast map sheet parameter update time to the map sheet that need not upgrade and can confirm that this map sheet does not need to upgrade with map sheet, data set according to rank unit as a comparison, does not need to contrast successively each data set; For not needing the data updated collection only to need correlation data collection parameter update time can confirm that this data set does not need to upgrade, do not need to contrast each data item successively, reduced the reduced time that service end need spend.
Further, the present invention can be with map sheet, data set as updating block, and client can only ask the some or several map sheets or the data set of appointment independently to upgrade, and speed is faster, and more convenient user uses.
In addition, because the introducing of map sheet and regional relation also is able to realize upgrading by the zone, can better suit user's real demand.
Above content is to combine concrete preferred implementation to the further explain that the present invention did, and can not assert that practical implementation of the present invention is confined to these explanations.For the those of ordinary skill of technical field under the present invention, under the prerequisite that does not break away from the present invention's design, can also make some simple deduction or replace, all should be regarded as belonging to protection scope of the present invention.
Claims (5)
1. the client of a navigational system is characterized in that, comprising:
Client map datum memory module is used to store the map elements data of client, and said client map datum memory module also stores the update mode information of the update mode that can reflect that the client map datum is current; Said update mode information is total final updating time of said client, or the final updating time of said client appointment map sheet, or the final updating time of said client specific data collection, or the final updating time of said client appointed area;
The client data sending module is used for renewal request and update mode information are sent to service end;
The client data receiver module is used to receive the disposable packet that sends of service end;
Packet is resolved update module, is used for the packet that the client data receiver module obtains is resolved, and has obtained taking place in the service end map elements data of upgrading; And according to map elements data and update mode information in the said map elements Data Update client map datum memory module that has taken place to upgrade;
Concrete a kind of through in following four kinds of schemes:
First kind of scheme: total update time of the parameter that is provided with the last total final updating time of client of the map datum that is used to preserve client in the described client; The update mode information of said client map datum memory module storage is total final updating time of client of preserving in the parameter total update time; Said packet resolve update module accomplish upgrade after, the response of also value in the total update time parameter being arranged to service end is worth constantly;
Second kind of scheme: the map datum of described client comprises corresponding, that the be positioned at different figure layers map sheet more than a group with service end, and said map elements data are documented in respectively in the different map sheets; Wherein, each map sheet is respectively equipped with map sheet parameter update time of the final updating time that is used to preserve this map sheet; The update mode information of said client map datum memory module storage is total final updating time of client of preserving in the parameter total update time; Said packet resolve update module accomplish upgrade after, the response of also value in the total update time parameter being arranged to service end is worth constantly; And the response that the value in map sheet parameter update time of all map sheets is arranged to service end is worth constantly;
The third scheme: the map datum of described client comprises corresponding, that the be positioned at different figure layers map sheet more than a group with service end, and said map elements data are documented in respectively in the different map sheets; Wherein, each map sheet is respectively equipped with map sheet parameter update time of the final updating time that is used to preserve this map sheet; The final updating time of the map sheet of preserving in map sheet parameter update time of update mode information for the appointment map sheet of said client map datum memory module storage; Said packet resolve update module accomplish upgrade after, the response of also value in map sheet parameter update time of corresponding map sheet being arranged to service end is worth constantly;
The 4th kind of scheme: the map datum of described client comprises corresponding, that the be positioned at different figure layers map sheet more than a group with service end, and said map elements data are documented in respectively in the different map sheets; Wherein, each map sheet is respectively equipped with map sheet parameter update time of the final updating time that is used to preserve this map sheet; Be provided with in the described client and preserved the area update module of zone with the corresponding relation of map sheet, wherein, the corresponding respectively area update time parameter that is useful on the final updating time of preserving current region in each zone; The final updating time of the map sheet of preserving in map sheet parameter update time of the update mode information of said client map datum memory module storage for the corresponding map sheet in appointed area that obtains according to the area update module; Or be final updating time in the zone of preserving in the area update time parameter of appointed area; Said packet resolve update module accomplish upgrade after, the response of also value in map sheet parameter update time of corresponding map sheet being arranged to service end is worth constantly; Or the response that the value in the area update time parameter of corresponding region is arranged to service end is worth constantly.
2. the service end of a navigational system is characterized in that, comprising:
The service end data reception module is used to receive renewal request and the update mode information that client is sent; Said update mode information is total final updating time of said client, or the final updating time of said client appointment map sheet, or the final updating time of said client specific data collection, or the final updating time of said client appointed area;
Service end map datum memory module is used for the map elements data of stores service end, and each said map elements data all is provided with the update mode information parameter;
Map elements Data Matching module is used for searching in service end map datum memory module the map elements data of the update mode information matches of the client that receives with the service end data reception module;
The service end data transmission blocks, the disposable client that sends to after the map elements packing data that is used for map elements Data Matching module was collected;
Concrete a kind of through in following three kinds of schemes:
First kind of scheme: the map datum of described service end comprises corresponding, that the be positioned at different figure layers map sheet more than a group with client, and said map elements data are documented in respectively in the different map sheets; Wherein, each map sheet is respectively equipped with map sheet parameter update time of the final updating time that is used to preserve this map sheet; Update mode information in the said service end map datum memory module is total final updating time of client; Said map elements Data Matching module is carried out following steps: D01: relatively whether the final updating time of the corresponding map sheet of service end is later than total final updating time of client; If; In current map sheet, searching its all final updating time is later than the map elements data of the total final updating of client time, sends to said service end data transmission blocks; Change step D02, if not, step D02 directly changeed; D02: more next map sheet, execution in step D01 relatively accomplishes until all map sheets again;
Second kind of scheme: the map datum of described service end comprises corresponding, that the be positioned at different figure layers map sheet more than a group with client, and said map elements data are documented in respectively in the different map sheets; Wherein, each map sheet is respectively equipped with map sheet parameter update time of the final updating time that is used to preserve this map sheet; Update mode information in the said service end map datum memory module is the final updating time that client is specified map sheet; Said map elements Data Matching module is carried out following steps: relatively whether the final updating time of the corresponding map sheet of service end is later than the final updating time that client is specified map sheet; If; In current map sheet, searching its all final updating time is later than the map elements data that client is specified the final updating time of map sheet, sends to said service end data transmission blocks; If not the notice client need not upgraded;
The third scheme: be provided with in the described service end and preserved the area update submodule of zone with the corresponding relation of map sheet, wherein, the corresponding respectively area update time parameter that is useful on the final updating time of preserving current region in each zone; Update mode information in the said service end map datum memory module is the final updating time of client appointed area, and said map elements Data Matching module is carried out following steps: D11: in the area update submodule, search and obtain the corresponding map sheet in appointed area; D12: whether the final updating time of the map sheet that obtains among the comparison step D11 is later than the final updating time of client appointed area; If; In current map sheet, searching its all final updating time is later than the map elements data that client is specified the final updating time of map sheet, sends to said service end data transmission blocks; If not the notice client need not upgraded.
3. the client of a navigational system is characterized in that to service end request map method for updating, may further comprise the steps:
A: client is sent the update mode information of asking and can reflect the update mode that the client map datum is current of upgrading to service end;
B: client receives the disposable packet that returns of service end, and it is resolved, and has obtained taking place in the service end map elements data of upgrading, according to said map datum and the update mode information that the map elements Data Update client of renewal has taken place;
Concrete a kind of through in following four kinds of schemes:
First kind of scheme: total update time of the parameter that is provided with the last total final updating time of client of the map datum that is used to preserve client in the described client; In the described steps A, update mode information is total final updating time of client of preserving in the parameter total update time; Behind the described step B, also comprise the value in the total update time parameter is arranged to the step that the response of service end is worth constantly;
Second kind of scheme: the map datum of described client comprises corresponding, that the be positioned at different figure layers map sheet more than a group with service end, and said map elements data are documented in respectively in the different map sheets; Wherein, each map sheet is respectively equipped with map sheet parameter update time of the final updating time that is used to preserve this map sheet; In the described steps A, update mode information is total final updating time of client of preserving in the parameter total update time; Behind the described step B, comprise that also the response that the value in the total update time parameter is arranged to service end is worth constantly; And the value in map sheet parameter update time of all map sheets is arranged to the step that the response of service end is worth constantly;
The third scheme: the map datum of described client comprises corresponding, that the be positioned at different figure layers map sheet more than a group with service end, and said map elements data are documented in respectively in the different map sheets; Wherein, each map sheet is respectively equipped with map sheet parameter update time of the final updating time that is used to preserve this map sheet; In the described steps A, the final updating time of the map sheet of preserving in map sheet parameter update time of update mode information for the appointment map sheet; Behind the described step B, also comprise the value in map sheet parameter update time of corresponding map sheet is arranged to the step that the response of service end is worth constantly;
The 4th kind of scheme: the map datum of described client comprises corresponding, that the be positioned at different figure layers map sheet more than a group with service end, and said map elements data are documented in respectively in the different map sheets; Wherein, each map sheet is respectively equipped with map sheet parameter update time of the final updating time that is used to preserve this map sheet; Be provided with in the described client and preserved the area update module of zone with the corresponding relation of map sheet, wherein, the corresponding respectively area update time parameter that is useful on the final updating time of preserving current region in each zone; In the described steps A, the final updating time of the map sheet of preserving in map sheet parameter update time of update mode information for the corresponding map sheet in appointed area that obtains according to the area update module; Or be final updating time in the zone of preserving in the area update time parameter of appointed area; Behind the described step B, also comprise the value in map sheet parameter update time of corresponding map sheet is arranged to the step that the response of service end is worth constantly; Or the value in the area update time parameter of corresponding region is arranged to the step that the response of service end is worth constantly.
4. the client of navigational system as claimed in claim 3 is to service end request map method for updating; It is characterized in that; In said the third scheme; Also be provided with the vehicle-surroundings update module in the described client, be used for obtaining some or several map sheets on the one or more figure layers of being positioned at of current vehicle position periphery as the appointment map sheet of update mode information.
5. the method for the renewal request of the service end customer in response end of a navigational system is characterized in that, may further comprise the steps:
C: service end receives renewal request and the update mode information that client is sent;
D: in the map datum of service end, search the map elements data that all its update mode parameters have satisfied the update mode information among the step C, the disposable client that sends in packing back;
Concrete a kind of through in following three kinds of schemes:
First kind of scheme: the map datum of described service end comprises corresponding, that the be positioned at different figure layers map sheet more than a group with client, and said map elements data are documented in respectively in the different map sheets; Wherein, each map sheet is respectively equipped with map sheet parameter update time of the final updating time that is used to preserve this map sheet; Among the described step D; If update mode information is total final updating time of client; Then carry out following steps: D01: relatively whether the final updating time of the corresponding map sheet of service end is later than total final updating time of client; If, in current map sheet, search its all final updating time to be later than the map elements data of the total final updating of client time, send to client after the packing; Change step D02, if not, step D02 directly changeed; D02: more next map sheet, execution in step D01 relatively accomplishes until all map sheets again;
Second kind of scheme: the map datum of described service end comprises corresponding, that the be positioned at different figure layers map sheet more than a group with client, and said map elements data are documented in respectively in the different map sheets; Wherein, each map sheet is respectively equipped with map sheet parameter update time of the final updating time that is used to preserve this map sheet; Among the described step D; If update mode information is the final updating time that client is specified map sheet; Then relatively whether the final updating time of the corresponding map sheet of service end is later than the final updating time that client is specified map sheet; If, in current map sheet, search its all final updating time to be later than the map elements data that client is specified the final updating time of map sheet, send to client after the packing; If not the notice client need not upgraded;
The third scheme: be provided with in the described service end and preserved the area update submodule of zone with the corresponding relation of map sheet, wherein, the corresponding respectively area update time parameter that is useful on the final updating time of preserving current region in each zone; Among the described step D,, then may further comprise the steps: D11: in the area update submodule, search and obtain the corresponding map sheet in appointed area if update mode information is the final updating time of client appointed area; D12: whether the final updating time of the map sheet that obtains among the comparison step D11 is later than the final updating time of client appointed area; If; In current map sheet, searching its all final updating time is later than the map elements data that client is specified the final updating time of map sheet, sends to client after the packing; If not the notice client need not upgraded.
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| CN102222445A (en) * | 2011-05-18 | 2011-10-19 | 深圳市凯立德科技股份有限公司 | Method, device and location-based service (LBS) terminal for updating map data |
| CN102413170A (en) * | 2011-10-18 | 2012-04-11 | 国网电力科学研究院 | Graphic data client buffer memory method based on FLEX |
| CN103259616B (en) * | 2012-02-20 | 2016-12-28 | 联想(北京)有限公司 | A kind of data transmission method |
| CN111367649B (en) * | 2018-12-26 | 2024-03-01 | 北京四维图新科技股份有限公司 | High-precision map data parallel processing method and device |
| CN113497670B (en) * | 2020-03-20 | 2023-03-31 | 华为技术有限公司 | Map data acquisition method, device and system |
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