CN102281310B - Method for monitoring on-line state of vehicle-mounted global positioning system (GPS) terminal in real time - Google Patents
Method for monitoring on-line state of vehicle-mounted global positioning system (GPS) terminal in real time Download PDFInfo
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- CN102281310B CN102281310B CN201010199479.8A CN201010199479A CN102281310B CN 102281310 B CN102281310 B CN 102281310B CN 201010199479 A CN201010199479 A CN 201010199479A CN 102281310 B CN102281310 B CN 102281310B
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Abstract
The invention provides a method for monitoring the on-line state of a vehicle-mounted global positioning system (GPS) terminal in real time and relates to a method for processing mobile terminal data in a GPS monitoring system. The method for monitoring the on-line state of the vehicle-mounted GPS terminal in real time comprises the following steps that: a communication relationship and a data sheet are established in the system; a vehicle-mounted GPS terminal logs in and is written into a database and a network management server; the vehicle-mounted GPS terminal is off line and is written into the database and the network management server; and an operating terminal receives and displays the on-line state of each vehicle-mounted GPS terminal provided by the network management server. By the method, the problems of interference to the database and data distortion because the operating terminal inquires the database regularly to display the on-line state of the vehicle-mounted GPS terminal timely are solved.
Description
Technical field
The present invention relates to the method for handle mobile terminal data in a kind of GPS supervisory control system.
Background technology
Existing GPS supervisory control system, as shown in Figure 1: a Surveillance center 1 carries out radio communication contact with multiple stage GPS terminal 2, the ruuning situation of these GPS terminals 2 of data monitoring that one side is uploaded according to each GPS terminal 2, assigns control command to each GPS terminal 2 on the other hand and provides information on services.GPRS front end processor 11, service server 12, database 13, NM server 14 and multiple stage operating terminal 15 is provided with in Surveillance center 1.GPRS front end processor 11 and each GPS terminal 2 carry out radio communication contact by mobile communications network.In Surveillance center 1: service server 12 connects with GPRS front end processor 11, realize two-way information exchange.Service server 12 connects with database 13, carries out data access operation to database 13.GPRS front end processor 11 connects with NM server 14, realizes two-way information exchange.All operations terminal 15 all connects with NM server 14, realizes two-way information exchange.All operations terminal 15 all connects with database 13, carries out the operation of reading data.
Can receive control command and information on services in time in order to ensure affiliated each GPS terminal 2, each operating terminal 15 must ignore current not online GPS terminal 2, and corresponding information is sent to online GPS terminal 2; To reduce invalid transmit operation.In addition, each operating terminal 15 also can through the online situation of GPS terminal 2 belonging to investigating, judge specific GPS terminal 2 whether normally work or wireless network whether normal.
At present, in GPS supervisory control system, the method for the online situation of real time monitoring GPS terminal is:
Step 1, sets up correspondence and tables of data: for each GPS terminal assigns the communication cryptology of the GPRS front end processor communicated with it in system, makes GPRS front end processor set up correspondence with each GPS terminal of its administration respectively; Vehicle summary table is preserved respectively in database and GPRS front end processor, this vehicle summary table comprises the entry of all GPS terminals in native system, and the data item comprised in the entry of wherein each GPS terminal has the communication cryptology of this GPS terminal, title and current presence; The vehicle monitoring table of this operating terminal is preserved in each operating terminal, this vehicle monitoring table comprises the entry of all GPS terminals of this operating terminal administration, and the data item comprised in the entry of wherein each GPS terminal has the communication cryptology of this GPS terminal, title and current presence;
Step 2, GPS terminal logs in and data-in storehouse: GPS terminal sends out logon information to GPRS front end processor, after receiving this logon information, in the vehicle summary table that GPRS front end processor is preserved by the communication cryptology of this GPS terminal this GPS terminal entry in current presence data item be designated as online, and the login message of this GPS terminal is sent to service server, presence data item current in the entry of this GPS terminal in vehicle summary table in database is designated as online by this login message by service server;
Step 3, GPS terminal rolls off the production line and data-in storehouse: the GPS terminal logged in sends out maintenance information with fixed intervals timing to GPRS front end processor, if GPRS front end processor receives the maintenance information of this GPS terminal in official hour section, judge that this GPS terminal is online, using the initial time of current time as subsequent time period; If GPRS front end processor not yet receives the maintenance information of this GPS terminal after official hour section, judge that this GPS terminal rolls off the production line, in the vehicle summary table that this GPRS front end processor is preserved this GPS terminal entry in current presence data item be designated as and roll off the production line, and the message that rolls off the production line of this GPS terminal is sent to service server, presence data item current in the entry of this GPS terminal in vehicle summary table in database to be designated as by this message that rolls off the production line and to roll off the production line by service server;
Step 4, operating terminal Query Database also shows the presence of each GPS terminal: operating terminal is according to the vehicle monitoring table of self, extract the current presence of all GPS terminals of its administration from database with predetermined time interval, stored in the vehicle monitoring table of self, and the title of each GPS terminal in this vehicle monitoring table and current presence are shown, for operator's reference.
Said method can meet the needs of general monitoring.But, because service server can carry out a large amount of data access operations to database; If the time interval of each operating terminal Query Database is shorter, such as 1 minute, then each operating terminal can be too frequent to the inquiry of database, affects the normal operation of database; If the time interval of each operating terminal Query Database is longer, such as 10 minutes, then in the vehicle monitoring table of each operating terminal, the data of the current presence of each GPS terminal there will be distortion, affect the control of operator.
Summary of the invention
The present invention aims to provide the method for the online situation of a kind of real time monitoring GPS terminal, and each operating terminal can obtain the True Data of the current presence of all GPS terminals of its administration in real time, and can not affect the normal operation of database.
Technical scheme of the present invention is: the method for the online situation of a kind of real time monitoring GPS terminal, and the step comprised has:
Steps A, sets up correspondence and tables of data: for each GPS terminal assigns the communication cryptology of the GPRS front end processor communicated with it, makes GPRS front end processor set up correspondence with each GPS terminal respectively in system; Vehicle summary table is preserved respectively in database, NM server and GPRS front end processor, this vehicle summary table comprises the entry of all GPS terminals in native system, and the data item comprised in the entry of wherein each GPS terminal has the initial time of the communication cryptology of this GPS terminal, title, preventive maintenance time section and current presence; The vehicle monitoring table of this operating terminal is preserved in each operating terminal, this vehicle monitoring table comprises the entry of all GPS terminals of this operating terminal administration, and the data item comprised in the entry of wherein each GPS terminal has the communication cryptology of this GPS terminal, title and current presence; The vehicle monitoring table of all operations terminal is preserved in NM server;
Step B, GPS terminal logs in and data-in storehouse and NM server: GPS terminal sends out logon information to GPRS front end processor, after receiving this logon information, in the vehicle summary table that GPRS front end processor is preserved by the communication cryptology of this GPS terminal this GPS terminal entry in current presence data item be designated as online, using the initial time of current time as the preventive maintenance time section of this GPS terminal, and the login message of this GPS terminal is sent to service server, presence data item current in the entry of this GPS terminal in vehicle summary table in database is designated as online by this login message by service server, GPRS front end processor also sends the login message of this GPS terminal to NM server, current presence data item in the entry of this GPS terminal in the vehicle summary table of self is designated as online by this login message by NM server,
Step C, GPS terminal rolls off the production line and data-in storehouse and NM server: the GPS terminal logged in sends out maintenance information with fixed intervals timing to GPRS front end processor; If GPRS front end processor receives the maintenance information of this GPS terminal, then judge that this GPS terminal is online, using the initial time of current time as next preventive maintenance time section of this GPS terminal; If GPRS front end processor not yet receives the maintenance information of this GPS terminal after the preventive maintenance time section reaching regulation, judge that this GPS terminal rolls off the production line, in the vehicle summary table that GPRS front end processor is preserved this GPS terminal entry in current presence data item be designated as and roll off the production line, and the message that rolls off the production line of this GPS terminal is sent to service server, presence data item current in the entry of this GPS terminal in vehicle summary table in database to be designated as by this message that rolls off the production line and to roll off the production line by service server; GPRS front end processor also sends the message that rolls off the production line of this GPS terminal to NM server, current presence data item in the entry of this GPS terminal in the vehicle summary table of self to be designated as by this message that rolls off the production line and to roll off the production line by NM server;
Step D, operating terminal receives and shows the presence of each GPS terminal that NM server provides in real time: for the GPS terminal logged in or roll off the production line, NM server finds out the operating terminal of this GPS terminal of administration from all vehicle monitoring tables of self, and current presence new for this GPS terminal is sent to this operating terminal in real time as state variation message, this operating terminal receives the vehicle monitoring table of current presence new for this GPS terminal stored in self after this state variation message, and the title of each GPS terminal in this vehicle monitoring table and current presence are shown.
Optimize embodiment in: in described step D, operating terminal receive NM server send GPS terminal state variation message after, this operating terminal using this state variation message as response loopback to NM server; If NM server receives this response in the response time interval of regulation, then the new current presence information receiving this GPS terminal in the new current presence information of this GPS terminal in this response and the vehicle summary table of self is compared by NM server, if consistent, does not deal with this operating terminal; If NM server does not receive the response of this operating terminal in the response time interval of regulation, or the result of above-mentioned comparison is inconsistent, then current presence information new for this GPS terminal in the vehicle summary table of self is sent to this operating terminal as state variation message by NM server again; After this operating terminal receives this state variation message, repeat aforesaid operations until NM server judges that current presence information that in the response that this operating terminal is beamed back, this GPS terminal is new is consistent with the current presence information of this GPS terminal in self vehicle summary table.
The method of the online situation of real time monitoring GPS terminal of the present invention, GPRS front end processor is utilized directly the login message of GPS terminal or the message that rolls off the production line to be sent to NM server, by NM server by above-mentioned GPS terminal log in or offline information send in real time administration this GPS terminal operating terminal go display, avoid operating terminal for show in time GPS terminal presence and timing Query Database, cause to the interference of database and the problem of data distortion.Operator when controlling GPS terminal by operating terminal, can reduce invalid instruction or the transmit operation of service data, improves control and the operational efficiency of system.Issue in the processing procedure of GPS terminal state variation message at NM server to operating terminal, operating terminal adopts the measure of replying and being combined with comparison with NM server, the accuracy of GPS terminal presence change information on operating terminal can be guaranteed, thus ensure the control of system and reliable.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing GPS supervisory control system.
Fig. 2 is the process schematic diagram of a method embodiment of the online situation of real time monitoring GPS terminal of the present invention.
Embodiment
A GPS supervisory control system that have employed the method for the online situation of real time monitoring GPS terminal of the present invention is identical with the existing GPS supervisory control system shown in Fig. 1.In this GPS supervisory control system: a Surveillance center 1 carries out radio communication contact with multiple stage GPS terminal 2, the ruuning situation of these GPS terminals 2 of data monitoring that one side is uploaded according to each GPS terminal 2, assigns control command to each GPS terminal 2 on the other hand and provides information on services.
GPRS front end processor 11, service server 12, database 13, NM server 14 and multiple stage operating terminal 15 is provided with in Surveillance center 1.GPRS front end processor 11 and each GPS terminal 2 carry out radio communication contact by mobile communications network.In Surveillance center 1: service server 12 connects with GPRS front end processor 11, realize two-way information exchange.Service server 12 connects with database 13, carries out data access operation to database 13.GPRS front end processor 11 connects with NM server 14, realizes two-way information exchange.All operations terminal 15 all connects with NM server 14, realizes two-way information exchange.All operations terminal 15 all connects with database 13, carries out the operation of reading data.
In this GPS supervisory control system, for each GPS terminal 2 assigns the communication cryptology of the GPRS front end processor 11 communicated with it, GPRS front end processor 11 is made to set up correspondence with each GPS terminal 2 respectively.
In the Surveillance center 1 of this GPS supervisory control system, vehicle summary table is preserved respectively in database 13, NM server 12 and GPRS front end processor 11, this vehicle summary table comprises the entry of all GPS terminals in native system, and the data item comprised in the entry of wherein each GPS terminal has the initial time of the communication cryptology of this GPS terminal, title, online record list, preventive maintenance time section and current presence; Wherein, the time that in online record list, record logs in each time or rolls off the production line.
In the Surveillance center 1 of this GPS supervisory control system, each operating terminal 15 preserves the vehicle monitoring table of this operating terminal, this vehicle monitoring table comprises the entry of all GPS terminals 2 of this operating terminal administration, and the data item comprised in the entry of wherein each GPS terminal 2 has the communication cryptology of this GPS terminal 2, title and current presence.
In the Surveillance center 1 of this GPS supervisory control system, NM server 14 preserves the vehicle monitoring table of all operations terminal 15.
In this GPS supervisory control system, the process of the online situation of GPS terminal 2 of its administration of operating terminal 15 real time monitoring, as shown in Figure 2:
Step B, GPS terminal 2 logs in and data-in storehouse 13 and NM server 14, wherein:
Sub-step B1, GPS terminal 2 is to 11 logon informations of the GPRS front end processor in Surveillance center 1.
Sub-step B2, after GPRS front end processor 11 receives this logon information, the entry of this GPS terminal 2 in its vehicle summary table preserved is found out by the communication cryptology of this GPS terminal 2, presence data item current in this entry is designated as online, current time is charged to the start time data item of the preventive maintenance time section in this entry; GPRS front end processor 11 sends the login message of this GPS terminal 2 to service server 12, and it is online data item that this login message contains the communication cryptology of the GPS terminal 2 logged in, current time and current presence.GPRS front end processor 11 also sends the login message of this GPS terminal 2 to NM server 14, it is online data item that this login message contains the communication cryptology of the GPS terminal 2 logged in, current time and current presence.
Sub-step B3, after service server 12 receives this login message, the entry of this GPS terminal 2 in vehicle summary table in database 13 is searched by the communication cryptology of this GPS terminal 2 in this login message, presence data item current in this entry is designated as online, current time is charged to of online record single data items in this entry new log in hurdle.
Sub-step B4, after NM server 14 receives this logon information, NM server 14 finds out the entry of this GPS terminal 2 in the vehicle summary table of himself by the communication cryptology of this GPS terminal 2 in this login message, and presence data item current in this entry is designated as online by NM server 14.The communication cryptology of this GPS terminal 2 and current time are charged to an entry of the state variation table of self by NM server 14, and wherein current time charges to the initial time hurdle of this entry.
Step C, GPS terminal 2 rolls off the production line and data-in storehouse 13 and NM server 14, wherein:
Sub-step C1, the GPS terminal 2 logged in fixed intervals (such as 30 seconds) timing to GPRS front end processor 11 maintenance informations.
Sub-step C2, if GPRS front end processor 11 receives the maintenance information of this GPS terminal 2, then judge that this GPS terminal 2 is online, the entry of this GPS terminal 2 in self vehicle summary table is found out by the communication cryptology of this GPS terminal 2, current time is charged to the start time data item of the preventive maintenance time section in this entry, as the initial time of next preventive maintenance time section of this GPS terminal 2;
Sub-step C3, GPRS front end processor 11 is the start time data item of the preventive maintenance time section in the entry of online GPS terminal 2 with current presence data item all in the vehicle summary table of fixed intervals (such as 1 minute) regular check self, if the initial time of preventive maintenance time section in the entry of this GPS terminal 2 and the difference of current time are greater than the preventive maintenance time section (such as 2 minutes) of regulation, namely GPRS front end processor 11 not yet receives the maintenance information of this GPS terminal 2 after the preventive maintenance time section reaching regulation, then GPRS front end processor 11 judges that this GPS terminal 2 rolls off the production line, current presence data item in the entry of this GPS terminal 2 in the vehicle summary table of himself is designated as and rolls off the production line by GPRS front end processor 11, and the message that rolls off the production line of this GPS terminal is sent to service server 12, this message that rolls off the production line contains the communication cryptology of the GPS terminal 2 rolled off the production line, current time and current presence are the data item rolled off the production line.GPRS front end processor 11 also sends the message that rolls off the production line of this GPS terminal 2 to NM server 14, it is the data item rolled off the production line that this message that rolls off the production line contains the communication cryptology of the GPS terminal 2 rolled off the production line, current time and current presence.
Sub-step C4, after service server 12 receives this message that rolls off the production line, the entry of this GPS terminal 2 in vehicle summary table in database 13 is searched by the communication cryptology of this GPS terminal 2 in this message that rolls off the production line, presence data item current in this entry is designated as and rolls off the production line, current time is charged to the hurdle that rolls off the production line that of online record single data items in this entry is new.
Sub-step C5, after NM server 14 receives this offline information, NM server 14 finds out the entry of this GPS terminal 2 in the vehicle summary table of himself by the communication cryptology of this GPS terminal 2 in this message that rolls off the production line, and presence data item current in this entry is designated as and rolls off the production line by NM server 14.The communication cryptology of this GPS terminal 2 and current time are charged to an entry of the state variation table of self by NM server 14, and wherein current time charges to the initial time hurdle of this entry.
Step D, operating terminal 15 receives and shows the presence of each GPS terminal 2 that NM server 14 provides in real time, wherein:
Sub-step D1, for the GPS terminal 2 logged in or roll off the production line, NM server 14 finds out the vehicle monitoring table of the communication cryptology registering this GPS terminal 2 from all vehicle monitoring tables of self, is determined the operating terminal 15 of this GPS terminal 2 of administration by this vehicle monitoring table.The communication cryptology of this GPS terminal 2 and new current presence are sent to this operating terminal 15 as state variation message by NM server 14 in real time.
Sub-step D2, after this operating terminal 15 receives this state variation message, the entry of this GPS terminal 2 in the vehicle monitoring table of self is searched by the communication cryptology of this GPS terminal 2 in this state variation message, by current presence new for this GPS terminal 2 stored in this entry, and the title of each GPS terminal 2 in this vehicle monitoring table and current presence are shown.
Sub-step D3, this operating terminal 15 receive NM server 14 send GPS terminal state variation message after, this operating terminal 15 using this state variation message as response loopback to NM server 14.
Sub-step D4, if NM server 14 receives this response, then the new current presence information of this GPS terminal in current presence information new for this GPS terminal 2 in this response and the vehicle summary table of self is compared by NM server 14, if consistent, NM server 14 deletes the entry of this GPS terminal 2 in the state variation table of self, and does not deal with this operating terminal 15.The result of above-mentioned comparison is inconsistent, then perform sub-step D5.
Sub-step D5, NM server 14 is with the state variation table of fixed intervals (such as 30 seconds) regular check self, if the data on initial time hurdle in the entry of this GPS terminal 2 and the difference of current time are more than or equal to this fixed intervals, namely in the response time interval of regulation, NM server 14 does not receive the response of this operating terminal 15, or the result of above-mentioned comparison is inconsistent, then current presence information new for this GPS terminal 2 in the vehicle summary table of self is sent to this operating terminal 15 as state variation message by NM server 14 again.
Sub-step D6, after this operating terminal 15 receives this state variation message, the entry of this GPS terminal 2 in the vehicle monitoring table of self is searched by the communication cryptology of this GPS terminal 2 in this state variation message, by current presence new for this GPS terminal 2 stored in this entry, and the title of each GPS terminal 2 in this vehicle monitoring table and current presence are shown.
Sub-step D7, this operating terminal 15 receive NM server 14 send GPS terminal state variation message after, this operating terminal 15 using this state variation message as response loopback to NM server 14.
Sub-step D8, if NM server 14 receives this response, then the new current presence information of this GPS terminal in current presence information new for this GPS terminal 2 in this response and the vehicle summary table of self is compared by NM server 14, if consistent, NM server 14 deletes the entry of this GPS terminal 2 in the state variation table of self, and does not deal with this operating terminal 15.The result of above-mentioned comparison is inconsistent, then perform sub-step D5, repeat aforesaid operations until NM server 14 judges that current presence information that in the response that this operating terminal 15 is beamed back, this GPS terminal 2 is new is consistent with the current presence information of this GPS terminal 2 in self vehicle summary table.
Each operating terminal 15 also can direct accessing database 13, in Query Database 13 in vehicle summary table administrative each GPS terminal 2 entry in online record list.Log in the online situation such as number of times and the line duration after logging in each time through the administrative GPS terminal 2 of investigation is historical, judge whether specific GPS terminal 2 works normally or judge that whether wireless network is normal.
The above, be only present pre-ferred embodiments, do not limit scope of the invention process with this, and equivalence change and the modification done according to technical scheme of the present invention and description, all should belong to the scope that the present invention is contained.
Claims (1)
1. a method for the online situation of real time monitoring GPS terminal, the step comprised has:
Steps A, sets up correspondence and tables of data: for each GPS terminal assigns the communication cryptology of the GPRS front end processor communicated with it, makes GPRS front end processor set up correspondence with each GPS terminal respectively in system; Vehicle summary table is preserved respectively in database, NM server and GPRS front end processor, this vehicle summary table comprises the entry of all GPS terminals in native system, and the data item comprised in the entry of wherein each GPS terminal has the initial time of the communication cryptology of this GPS terminal, title, preventive maintenance time section and current presence; The vehicle monitoring table of this operating terminal is preserved in each operating terminal, this vehicle monitoring table comprises the entry of all GPS terminals of this operating terminal administration, and the data item comprised in the entry of wherein each GPS terminal has the communication cryptology of this GPS terminal, title and current presence; The vehicle monitoring table of all operations terminal is preserved in NM server;
Step B, GPS terminal logs in and data-in storehouse and NM server: GPS terminal sends out logon information to GPRS front end processor, after receiving this logon information, in the vehicle summary table that GPRS front end processor is preserved by the communication cryptology of this GPS terminal this GPS terminal entry in current presence data item be designated as online, using the initial time of current time as the preventive maintenance time section of this GPS terminal, and the login message of this GPS terminal is sent to service server, presence data item current in the entry of this GPS terminal in vehicle summary table in database is designated as online by this login message by service server, GPRS front end processor also sends the login message of this GPS terminal to NM server, current presence data item in the entry of this GPS terminal in the vehicle summary table of self is designated as online by this login message by NM server,
Step C, GPS terminal rolls off the production line and data-in storehouse and NM server: the GPS terminal logged in sends out maintenance information with fixed intervals timing to GPRS front end processor; If GPRS front end processor receives the maintenance information of this GPS terminal, then judge that this GPS terminal is online, using the initial time of current time as next preventive maintenance time section of this GPS terminal; If GPRS front end processor not yet receives the maintenance information of this GPS terminal after the preventive maintenance time section reaching regulation, judge that this GPS terminal rolls off the production line, in the vehicle summary table that GPRS front end processor is preserved this GPS terminal entry in current presence data item be designated as and roll off the production line, and the message that rolls off the production line of this GPS terminal is sent to service server, presence data item current in the entry of this GPS terminal in vehicle summary table in database to be designated as by this message that rolls off the production line and to roll off the production line by service server; GPRS front end processor also sends the message that rolls off the production line of this GPS terminal to NM server, current presence data item in the entry of this GPS terminal in the vehicle summary table of self to be designated as by this message that rolls off the production line and to roll off the production line by NM server;
Step D, operating terminal receives and shows the presence of each GPS terminal that NM server provides in real time: for the GPS terminal logged in or roll off the production line, NM server finds out the operating terminal of this GPS terminal of administration from all vehicle monitoring tables of self, and current presence new for this GPS terminal is sent to this operating terminal in real time as state variation message, this operating terminal receives the vehicle monitoring table of current presence new for this GPS terminal stored in self after this state variation message, and the title of each GPS terminal in this vehicle monitoring table and current presence are shown, this operating terminal using this state variation message as response loopback to NM server, if NM server receives this response in the response time interval of regulation, then the new current presence information receiving this GPS terminal in the new current presence information of this GPS terminal in this response and the vehicle summary table of self is compared by NM server, if consistent, does not deal with this operating terminal, if NM server does not receive the response of this operating terminal in the response time interval of regulation, or the result of above-mentioned comparison is inconsistent, then current presence information new for this GPS terminal in the vehicle summary table of self is sent to this operating terminal as state variation message by NM server again, after this operating terminal receives this state variation message, repeat aforesaid operations until NM server judges that current presence information that in the response that this operating terminal is beamed back, this GPS terminal is new is consistent with the current presence information of this GPS terminal in self vehicle summary table.
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| CN201010199479.8A CN102281310B (en) | 2010-06-12 | 2010-06-12 | Method for monitoring on-line state of vehicle-mounted global positioning system (GPS) terminal in real time |
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| CN103780657A (en) * | 2012-10-25 | 2014-05-07 | 深圳市赛格导航科技股份有限公司 | Vehicle security prompting service system |
| CN103281161B (en) * | 2013-05-17 | 2016-04-27 | 深圳市康凯斯信息技术有限公司 | The means of communication of a kind of GPS locating terminal and background server |
| CN104618131A (en) * | 2014-12-13 | 2015-05-13 | 广西科技大学 | Method for monitoring online status of vehicle-mounted GPS terminal in real time |
| CN104601368A (en) * | 2014-12-13 | 2015-05-06 | 广西科技大学 | Method for downloading vehicle-mounted GPS (global position system) terminal |
| CN105635271A (en) * | 2015-12-28 | 2016-06-01 | 中国民航信息网络股份有限公司 | Application on-line state monitor method and system |
| CN108282219B (en) * | 2018-01-31 | 2021-06-29 | 中电福富信息科技有限公司 | Long link switching processing method for data communication of vehicle satellite positioning system |
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