CN1987514A - System and its method for dynamic receiving auxiliary global satellite positioning system enveloping - Google Patents

System and its method for dynamic receiving auxiliary global satellite positioning system enveloping Download PDF

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Publication number
CN1987514A
CN1987514A CNA2005101209496A CN200510120949A CN1987514A CN 1987514 A CN1987514 A CN 1987514A CN A2005101209496 A CNA2005101209496 A CN A2005101209496A CN 200510120949 A CN200510120949 A CN 200510120949A CN 1987514 A CN1987514 A CN 1987514A
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China
Prior art keywords
satellite
positioning system
data
satellite data
package
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Pending
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CNA2005101209496A
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Chinese (zh)
Inventor
叶俊男
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Mitac Computer Shunde Ltd
Mitac International Corp
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Mitac Computer Shunde Ltd
Mitac International Corp
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Priority to CNA2005101209496A priority Critical patent/CN1987514A/en
Publication of CN1987514A publication Critical patent/CN1987514A/en
Pending legal-status Critical Current

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Abstract

When Assisted Global Positional System (AGPS) obtains satellite information through General Packet Radio Service (GPRS), better transmission efficiency can be obtained based on mode of packet burst transmission.

Description

The system of dynamic receiving auxiliary global satellite positioning system package and method thereof
[Ji Intraoperative field]
The present invention improves the system of transmission of data packets mode and method thereof, particularly utilizes the mode of dynamic receiving auxiliary global satellite positioning system package to reach the system and the method thereof of transfer efficiency.
[Bei Jing Ji Intraoperative]
Please refer to Fig. 1, this is auxiliary global satellite positioning system (AGPS in the prior art, Assisted GlobalPosition System) locator meams synoptic diagram, itself and traditional Global Positioning System (GPS) (GPS, GlobalPosition System) Zui Da difference is, Global Positioning System (GPS) only utilizes satellite 140 to position, what for the first time location and each location institute afterwards must spend is chronic, auxiliary global satellite positioning system mobile phone 110 then is earlier by global mobile communication system (GSM, Global System for Mobilecommunications) base station (BSS, Basic Station System) 130 obtains the affiliated at present microcell 150 of user, and then judge general position, utilize these microcell 150 affiliated area scopes to the overhead at present satellite 140 of server 120 inquiries, and then utilize the satellite 140 of Global Positioning System (GPS) to do accurate location, not only can be with the time of locating for the first time, can be reduced to 10 seconds by traditional 5 to 10 minutes, locate required time afterwards at every turn, also be reduced to 1 to 2 second by 40 seconds, and after overcoming in traditional Global Positioning System (GPS) inlet chamber, the shortcoming that can't locate because the satellite reception is not good.
Owing to use Global Positioning System (GPS) when doing the location first time, must arrive first and have which satellite in vain on the present position of outdoor field search positioning signal can be provided, in general, the earth sky has 24 satellites at least and moves around the earth, each satellite enclosed around the earth one with 12 hours, they provide the signal of specific coding, after the Global Positioning System (GPS) receptacle is received satellite-signal more than at least 3, can calculate information such as the present position of user, speed and satellite time by the mode of 3 point locations.Progress along with science and technology, mobile phone also begins to develop towards multi-functional direction, for example built-in personal digital assistant (PDA, Personal Digital Assistant) function, even navigational system is also integrated into, auxiliary global satellite positioning system and develop, and its transmission mode is exactly to make the auxiliary global satellite positioning system mobile phone obtain the information of present overhead satellite by the transmission of integrating packet radio (GPRS, General Packet Radio Service).
Integrating packet radio is the new mechanics of communication standard of 2.5 generation GSM, with " packet-switched " (Packet Switch) technology is that data transmission is carried out on the basis, the technology that is different from general use " circuit switching " (Circuit Switch) is transmitted, can significantly promote transfer rate, make it to become the wireless mobile communication network of high-speed broadband.
When data are being integrated the packet radio system and transmitted, be to be divided into a succession of little " package ", rather than monopolize whole piece " circuit " and transmit.Therefore can allow many people shared network resource, make full use of limited frequency range.Package with auxiliary global satellite positioning system is an example, and the size of package is the 100k byte, integrates packet radio and also adopts IP agreement (Internet Protocol), and is more favourable interconnected with world-wide web.
Yet, the influence of landform and environment arround radiowave is subjected to easily, and be subjected to many multi-paths, path attenuation, interference such as shielding effect, cause the signal quality of radiowave to reduce, for example: certain microcell uses the co-channel interference that mobile phone caused (Co-channel Interference) of same carrier frequencies near another microcell, and arround the carrier frequency of microcell to mobile phone caused in this cell adjacent disturb frequently (Adjacent Channel Interference), all can influence the signal quality of radiowave that mobile phone is received in this cell.
When cellphone subscriber's number more for a long time, the frequency range (Bandwidth) that every cellphone subscriber is assigned to will be low more, the cellphone subscriber's total number of persons in microcell is all changing at any time, also make each handset allocation to frequency range change at any time; For example: when bus sometime enters certain microcell regional extent, cellphone subscriber's total number of persons in the microcell is incited somebody to action increase rapidly, the frequency range of every handset allocation is also incited somebody to action reduction at once, this makes the transmitting bandwidth of mobile phone have sizable variability (Varying), and there is suitable otherness in the result at delay (Delay) time of every data transmission arrival destination of mobile phone.
When the cellphone subscriber enters the dead angle of tunnel, rapid transit or some communications zone, mobile phone all temporarily can't be received signal, and the wireless signal strength that mobile phone receives is more unpredictable, and is also unstable.Based on above-mentioned factor, the package of mobile phone is easy to just transmit failure in fact, and each generation transmits after the situation of failure, this package all must wholely retransfer once again, not only very do not have efficient, and the transmission communication expense is again to calculate with data volume, even transmit failure this package being abandoned also is to charge by the data volume that has received, and this speed of coming not only may not accelerate satellite search, also may spend a lot of money in vain, therefore, improving transfer efficiency is an important problem in fact.
[summary of the invention]
In view of above problem, fundamental purpose of the present invention is to provide a kind of system and method thereof of dynamic receiving auxiliary global satellite positioning system package, by segmented mode package is received piecemeal, if run into the network traffic congestion or the situation of online interruption, then the segmentation of successfully receiving of this package needn't be transmitted once more again, as long as the segmentation that will not be successfully received as yet continues to transmit, treat to be combined into complete data packet after all segmentations all successfully receive.Thus, not only reduced the frequency range and the time of the required cost of data transmission amount, more can avoid causing the result that can't quicken to locate because of bust this.
Therefore, for reaching above-mentioned purpose, the system of disclosed a kind of dynamic receiving auxiliary global satellite positioning system package comprises server, base station and auxiliary global satellite positioning system mobile phone and constitutes, and wherein:
Base station (BSS, Basic Station System) transmits asking to server of satellite data in order to the receiving auxiliary global satellite positioning system mobile phone, and the auxiliary global satellite positioning system mobile phone that this satellite data is reached this request.
Aspect server, its satellite data request in order to send according to the auxiliary global satellite positioning system mobile phone that base station transmitted, search with microcell zone under this auxiliary global satellite positioning system mobile phone, and this satellite data of gained transmitted with segmented mode, wherein this server also includes: a satellite database, in order to write down each satellite in each time point, it contains the information of position range; And a central processing unit, the segmentation situation of sending satellite data to do in order to dynamic decision tendency to develop.
In addition aspect the auxiliary global satellite positioning system mobile phone, it is in order to searching its overhead satellite according to the satellite data of its present position of receive, and then obtains detailed locating information, and its inside must comprise:
One communication module in order to transmitting the requirement of its position satellite data, and receives each satellite data after the segmentation; One control module in order to monitoring the reception situation of each section satellite data, and after desired satellite data finished receiving by segmentation, merges each section satellite data again; And a memory module, in order to temporal data district as each section satellite data that is received.
And the method for disclosed a kind of dynamic receiving auxiliary global satellite positioning system package comprises the following step:
At first, send the request of its overhead satellite data to server by the auxiliary global satellite positioning system mobile phone; Then, server is judged the position at auxiliary global satellite positioning system mobile phone place according to the base station of this request of transmission; Come again, transmit with segmented mode according to this position enquiring satellite data and with the satellite data package that checks in; When the Global Positioning System (GPS) mobile phone receives the satellite data of each section in regular turn, be stored in it in buffer area respectively; At last, reconfigure the complete satellite data that each section satellite data becomes the overhead satellite of an auxiliary global satellite positioning system mobile phone.
Relevant characteristics and implementation of the present invention cooperate icon to be described in detail as follows as most preferred embodiment now.
[description of drawings]
Fig. 1 illustrates the embodiment synoptic diagram of existing auxiliary global satellite positioning system.
Fig. 2 illustrates the system architecture diagram of the present invention's running.
Fig. 3 illustrates the present invention at the implementation method process flow diagram of implementing the auxiliary global satellite positioning system mobile phone end.
Fig. 4 illustrates the implementation method process flow diagram of the present invention at server end.
[embodiment]
The present invention will disclose a kind of system and method thereof of dynamic receiving auxiliary global satellite positioning system package.In below of the present invention, describing in detail, will multiple specific details be described so that complete description of the present invention is provided.Yet, concerning knowing skill person, and can not need to use these specific detail just can implement the present invention, perhaps can be by utilizing the assembly or the method that substitute to implement the present invention.Under other situation, do not explain known method, program, parts and circuit especially, in order to avoid unnecessarily obscure emphasis of the present invention.
See also Fig. 1 and Fig. 2, and Fig. 2 is a system architecture synoptic diagram of the present invention, base station (BSS wherein, Basic Station System) the 130th, transmit in the radiowave mode, its reception scope division is become cellular microcell 150 blocks, can transmit the satellite data request in order to receiving auxiliary global satellite positioning system mobile phone 110, be passed to server 120 between any two by base station 130, and the auxiliary global satellite positioning system mobile phone 110 that this satellite data is reached this request.
And server 120 includes a satellite database 210 and a central processing unit 200, in order to satellite data request according to the base station 130 auxiliary global satellite positioning system mobile phone 110 that transmits, search with microcell 150 zones under this auxiliary global satellite positioning system mobile phone 110, and the satellite data that is checked in transmitted with segmented mode, integrate packet radio (GPRS owing to utilize, General PacketRadio Service) its transmission speed of mode is also unhappy, just can avoid interrupting by the segment transmissions mode, whole package must be passed again flow waste once after causing transport process to make a mistake again because of network blockage or transmission.
Satellite database 210, in order to write down each satellite 140 in each time point, it transmits and can contain the information of position range; Because Global Positioning System (GPS) (GPS, Global Position System) receiver is before receiving positioning signal, the time that all will spend several minutes earlier confirms there is which position location satellite 140 the current position top, could confirm present position according to these positioning signals behind the receiving satellite signal that continues, and can carry out follow-up continuous positioning, but, because the unusual condition of atmosphere, buildings covers and the influence of diffusion also can influence the accuracy of location, so under signal is not very stable situation, search for and confirm that satellite 140 often must spend long time, because satellite 140 sky on earth is in operation with constant speed, just as train that can not be overdue, so utilize the notebook data storehouse can allow the auxiliary global satellite positioning system mobile phone 110 of inquiry satellite data make its Global Positioning System (GPS) receiver promptly finish the cold boot program of confirming overhead satellite 140.
Central processing unit 200, the segmentation situation of sending satellite data to do in order to dynamic decision tendency to develop.Owing to integrate the transmission quality and the instability of packet radio, may be because translational speed be too fast, the barriers such as building, high mountain tunnel of passing through, perhaps the communication spike period runs into network and is jammed or the like all multifactor, packet loss significantly increases in the time of all may causing package to transmit, package is in case after transmitting failure, just must wholely retransfer once, therefore, the transmission status of the present network package of the sustainable monitoring in this unit, at any time adjust the size of package according to this network condition, for instance, a packet size of integrating packet radio is the 100k byte originally, because under the situation that network is jammed, cause and the data of this 100k byte can't be passed in the fixing transmission time (timeslot), and the formation bust this, therefore this 100k byte data can be splitted into 4 groups, with the data of each transmission 25k byte, thus, even the centre has a certain group to transmit failure, also needn't accent come again, for example when transmitting for the 3rd group, fail, then can for example be divided into every document 5k byte-sized and transmit again with the 3rd group of down segmentation of data continuation later on, after treating the situation improvement of network congestion, revert to bigger Datagram again and transmit.
In addition, aspect auxiliary global satellite positioning system mobile phone 110, it searches its overhead satellite 140 in order to according to this satellite data on microcell 150 positions at the present place of receive, make a concentrated effort to finish the cold boot program of Global Positioning System (GPS) receiver, and its inside must include:
Communication module 220, also comprise a radio frequency (RF, Radio Frequency) receiver, in order to transmitting the requiring of auxiliary global satellite positioning system mobile phone 110 satellite datas of sending to base station 130, and each satellite data of being transmitted of reception server 120 and base station 130.
Control module 230, in order to when each section satellite data when communication module 220 imports into, monitor the condition received.When server 120 tendencies to develop send satellite data to come, at first can transmit the data sementation size that 1 byte data record will transmit at present earlier, then, this module is the size that sustainable monitoring receives data volume, and whether receive a closing tag, whether successfully receive this section data to judge, and after each segmentation of desired satellite data finishes receiving one by one, again each section satellite data is merged.
Memory module 240, in order to data cached district as each section satellite data that receives, for satisfying read or write speed and can making repetitive read-write for system, generally can adopt SRAM or DRAM, though its price is comparatively expensive, but because satellite data can't be too big, so this module does not just need too many capacity yet.
See also Fig. 3 and Fig. 4, for the present invention respectively at the implementation method process flow diagram of auxiliary global satellite positioning system mobile phone 110 and server 120.When auxiliary global satellite positioning system mobile phone 110 is opened the Global Positioning System (GPS) function, the action that the Global Positioning System (GPS) receiver just must carry out cold boot (cold start) confirms correctly to receive the satellite of positioning signal, next, transmit the request (step 310) that gives present overhead satellite to server 120 by communication module 220, this request can be sent on each base station 130 in microcell 150 scopes at its place, respectively this base station 130 just can pass through the radio wave transmissions mode more then, communicate that request to next base station 130, till destination server 120 terminations are received.
After the requirement of server 120 reception its overhead satellite datas that mobile phone end transmits (step 410), because each base station 130 in the regional extent of its place microcell 150 all can be sent to its requirement server 120, so server 120 just can be inferred the scope (step 420) at this present place of mobile phone according to these base station positions that begins transmit data request; Then, from satellite database 210, search the satellite data (step 430) in present this time point and this scope sky by the scope of microcell 150, after judging the Network Transmission situation by central processing unit 200, satellite data is transmitted (step 440) with segmented mode.
At this moment, auxiliary global satellite positioning system mobile phone 110 can receive 1 byte data earlier, the data length (step 320) of this section satellite data that its inner record will receive at present, just continue one section satellite data (step 330) that reception server 120 transmits by communication module 130 then, the data length that is received when this section satellite data, the notice that transmits this segment data length with the server of receiving 120 at the beginning conforms to, and the ending notice (step 340) that receives this segment data is arranged, after representing that then this section data successfully receives, then this segment data is stored in memory module 240 earlier and makes temporary (step 350); Next, control module 230 can judge whether all segment data summations that receive reach a package length (step 360), promptly the 100k byte with present embodiment, a length (step 320) of integrating the packet radio package just, if control module 230 detecting information summations do not reach a package length yet, then send the requirement (step 370) that transmits next section satellite data by communication module 220, after all segmented mode has successfully been accepted with script one integration packet radio package, again each section data is reconfigured back a complete satellite data (step 380).
This complete satellite data has been arranged, the Global Positioning System (GPS) receiver can promptly overhead with it satellite be reached the action of affirmation, and mode by the segmentation dynamic transmission, because transmit the situation generation of failing if having in the transmission course, do not need whole package all to retransfer once, only need segmentation place that transmits failure is begun, not only can accelerate transmitting speed, more can save the unnecessary waste of network bandwidth, reaching increases the efficient that network uses.

Claims (13)

1. the system of a dynamic receiving auxiliary global satellite positioning system package, this system can make the efficient that transmits several satellite data packages comparatively improve, and it is characterized in that this system has:
Several base stations are in order to the intermediary as satellite data package transport process;
One server, this satellite data package dynamically transmits with segmented mode in order to incite somebody to action respectively, comprises:
One satellite database, respectively this satellite is at each time point in order to record, and it transmits and can contain the satellite data of position range; And
One central processing unit is in order to the segmentation situation of dynamic this satellite data of decision; And
One auxiliary global satellite positioning system mobile phone in order to search its overhead satellite according to respectively this satellite data that receives, comprises:
One communication module is in order to transmit the respectively requirement of this satellite data, to reach the respectively segmentation data of this satellite of its sky, position that receives;
One control module in order to monitoring the reception situation of each section satellite data, and merges each section satellite data after finishing receiving; And
One memory module is in order to temporary each section satellite data that is received.
2. the system of dynamic receiving auxiliary global satellite positioning system package as claimed in claim 1 is characterized in that: this central processing unit can be adjusted the size of segmentation according to the Network Transmission situation.
3. the system of dynamic receiving auxiliary global satellite positioning system package as claimed in claim 1 is characterized in that: be one after this each section satellite data merges and integrate packet radio (GPRS, GeneralPacket Radio Service) packet size.
4. the system of dynamic receiving auxiliary global satellite positioning system package as claimed in claim 1 is characterized in that: this server can transmit the length information of this section satellite data earlier before transmitting a segmentation satellite data package.
5. the system of dynamic receiving auxiliary global satellite positioning system package as claimed in claim 4 is characterized in that: the length information of this section satellite data is the 1k byte-sized.
6. the system of dynamic receiving auxiliary global satellite positioning system package as claimed in claim 4 is characterized in that: this server can transmit a closing tag again after this segmentation satellite data package of transmission is finished.
7. the system of dynamic receiving auxiliary global satellite positioning system package as claimed in claim 1 is characterized in that: this position is learnt by the zone that base station surrounded of transmitting this satellite data requirement.
8. dynamic receiving auxiliary global satellite positioning system package method, this method are applied to an auxiliary global satellite positioning system mobile phone and do the transmission of satellite data by several base stations and a server, it is characterized in that this method comprises the following step:
Send request of data by this auxiliary global satellite positioning system mobile phone to this server to its overhead satellite;
This server is judged the microcell scope at this auxiliary global satellite positioning system mobile phone place according to this base station of this request of transmission;
According to some satellite datas of this microcell range query;
Each the satellite data package that checks in is transmitted with segmented mode;
This auxiliary global satellite positioning system mobile phone receives respectively defending after the segmentation in regular turn. and sing data also is stored in the buffer area; And
After treating total the reception, reconfigure each section satellite data and make and become complete satellite data.
9. dynamic receiving auxiliary global satellite positioning system package method as claimed in claim 8 is characterized in that: this server can transmit the length information of this section satellite data earlier before transmitting a segmentation satellite data package.
10. dynamic receiving auxiliary global satellite positioning system package method as claimed in claim 9 is characterized in that: the information of the length information of this section satellite data is the 1k byte-sized.
11. dynamic receiving auxiliary global satellite positioning system package method as claimed in claim 9 is characterized in that: this server can transmit a closing tag again after this segmentation satellite data package of transmission is finished.
12. dynamic receiving auxiliary global satellite positioning system package method as claimed in claim 8 is characterized in that: be one after this each section satellite data merges and integrate packet radio (GPRS, General PacketRadio Service) packet size.
13. dynamic receiving auxiliary global satellite positioning system package method as claimed in claim 8, it is characterized in that: when this segmentation satellite data did not receive totally, then this auxiliary global satellite positioning system mobile phone can send the request of next section satellite data to this server.
CNA2005101209496A 2005-12-22 2005-12-22 System and its method for dynamic receiving auxiliary global satellite positioning system enveloping Pending CN1987514A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101799528B (en) * 2009-02-11 2012-10-10 晨星软件研发(深圳)有限公司 Positioning device and method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101799528B (en) * 2009-02-11 2012-10-10 晨星软件研发(深圳)有限公司 Positioning device and method

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Open date: 20070627