GPS (global positioning sistem)
GPS (global positioning sistem)
stric mi je nedavno iz nemacke doneo motorolu a835. super je tel. treca generacija i ostalo. ima cak i gps. koliko sam ja razumeo i shvatio mogu imati prikaz svoje pozicije, pozicije auta itd. da li ovo radi u srbiji (064) i sta se jos moze s njim? sve vise je telefona s ovom opcijom. ko sta jos moze reci o ovom neka napise. hvala
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gajic_ivan
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`Dr. Nick Riviera`
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Miškoni
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Nije baš tako... Tema je veoma interesantna, mislim da je vreme da se malo pozabavimo i ovim (GSM+GPS=A-GPS (Assisted-GPS)), jer nam kucka na vrata. Malo sam kopao po netu i svašta sam našao, ali o tome u sledećem postu. 
@sdejan
Trenutno ne možeš da koristiš GPS, jer ni Mobtel ni Telekom ne nude tu uslugu, ali će je sigurno uskoro pustiti (ovo uskoro je kod nas vrlo relativan pojam).
Ovo je već stara vest:
"Motorola’s 3G cell phone A835 comes with Assisted-GPS. Available from 3 in the UK, Sweden, Austria, Australia, Denmark, Hong Kong, and Italy."
Dakle, tamo radi i GPS, a u međuvremenu je proradio u još nekim zemljama.
Telekom je već pustio nešto slično - "ortak lokator" i "blizu mene", ali to za sada (koliko znam) nema veze sa GPS-om, već funkcioniše samo kao pozicioniranje pomoću repetitora. Pretpostavljam da će uskoro pustiti i server za opcije "Presence" i "Positioning" koje podržavaju novije Nokie. Koliko sam se igrao sa "blizu mene" (na Mondu), vrlo precizno radi i ima zaista svašta, ali mi se prikaz karata baš ne sviđa, pogotovo ako je razdaljina velika.
@sdejan
Trenutno ne možeš da koristiš GPS, jer ni Mobtel ni Telekom ne nude tu uslugu, ali će je sigurno uskoro pustiti (ovo uskoro je kod nas vrlo relativan pojam).
Ovo je već stara vest:
"Motorola’s 3G cell phone A835 comes with Assisted-GPS. Available from 3 in the UK, Sweden, Austria, Australia, Denmark, Hong Kong, and Italy."
Dakle, tamo radi i GPS, a u međuvremenu je proradio u još nekim zemljama.
Telekom je već pustio nešto slično - "ortak lokator" i "blizu mene", ali to za sada (koliko znam) nema veze sa GPS-om, već funkcioniše samo kao pozicioniranje pomoću repetitora. Pretpostavljam da će uskoro pustiti i server za opcije "Presence" i "Positioning" koje podržavaju novije Nokie. Koliko sam se igrao sa "blizu mene" (na Mondu), vrlo precizno radi i ima zaista svašta, ali mi se prikaz karata baš ne sviđa, pogotovo ako je razdaljina velika.
● PRAVILA FORUMA ●
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Miškoni
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Prvo mali uvod:
Današnji GPS je značajno integrisan u mobilnu telefoniju širom sveta, i rapidno se širi dalje i unapređuje. Predviđa se da će u narednih par godina većina telefona imati ugrađen i GPS prijemnik, i to ne loše i neprecizne prijemnike kakvi se obično nalaze u kojekakvim prenosnim spravicama, već će takva GSM/GPS kombinacija (pominjem samo GSM a odnosi se na sve postojeće mreže - GSM/GPRS, WCDMA (UMTS) i CDMA2000) morati da omogući lociranje u najtežim uslovima (podzemne garaže, betonske zgrade, kanjoni, itd.) (a Straževica?
). Potražnja tržišta za ovakvim uređajima je ogromna, mnogo veća nego za klasičnim GPS, što navodi mnoge proizvođače da se pozabave ovim.
Hardver (samo deo onoga što trenutno postoji):
Starija varijanta čipseta zvanog "Global Locate A-GPS chip-set" u sebi ima preko 20.000 korelatora, što mu omogućava da odradi velike proračune i da pronalazi satelite kojima je nivo signala ispod -158dBm, potrošnja mu je minimalna, a interval korekcije oko 250 milisekundi.
Najnovija varijanta čipseta "SiRFStar III" ima oko 200.000 korelatora i osetljivost od -159dBm. SiRFSoft GPS arhitektura omogućava integraciju u sve moguće prenosne uređaje (Intel XScale, OMAPI, PDA, GSM/Cell/Smart telefone, itd).
Rezultat ovakvog spoja - stotine miliona ljudi će u svakom trenutku kod sebe imati GPS prijemnik izvanrednih mogućnosti i karakteristika. Kako su zgodno napisali na jednom sajtu - "GPS and GSM go together".
Ovo datira od marta 2004.: "With a GPS phone you can tell your exact location and with the right service of the phone operator you can even project your position on a map in your friend’s cell phone. The service will tell you where you could meet and by which route to get there."
Ovo su neki od 3G telefona koji imaju GPS - Motorola A835, A920 i A925, NEC e313 i e616, zatim "World cell phones" - Motorola A840 i LG W800, pa Nokia modeli - 5140 (Xpress-on GPS Shell), komunikatori od modela 9210 uz pomoć add-on modula LAM-1, Motorola iDEN i58sr/i88s/i710/i730/i830 na Kanadskoj Telus mreži, Nextel i58sr, i88s, i530 i i730 (TeleType), itd.
U zemljama gde postoje "Locate Services", mobilni telefon može da odredi gde se nalazite i da prikaže mapu na ekranu, zatim, ukucate odredište i dobićete označenu rutu od polaznog mesta, tačno vas navodeći kuda treba da idete. U Engleskoj, pored opcije "od tačke A do tačke B", postoji još i "My Nearest" (pronalazi najbliže banke, bankomate, prodavnice, restorane, pumpe, itd.), zatim "Business Finder" za pronalaženje raznih firmi i preduzeća i "Quick Map" - kompletan adresar Engleske (deo ovoga je već pušten kod nas u nekoj varijanti).
U jednom od ranijih postova sam objašnjavao kako radi GPS, a ovo neću prevoditi, vežbajte malo engleski:
A-GPS explained in historical context
Introduction to Assisted-GPS (A-GPS)
When the U.S. Federal Communications Commission (FCC) in 1996 ordered that cellular phone carriers had to route 911 calls to a Public Safety Answering Point (PSAP) with Automatic Location Identification (ALI), it recognized that, at that time, technology did not exist that could provide detailed caller-location information.
Handsets with a GPS receiver incorporated seemed excluded, because
- after launching a 911 emergency call it would take the receiver several minutes to establish a fix (cold start) and being able to output the caller’s location co-ordinates
- GPS would have a very poor performance in too many situations (indoors, under dense foliage, in (urban) canyons, etc).
- a GPS receiver would drain too much power from the handset
- incorporating a GPS receiver in the handset would be far too expensive and too bulky.
Network-based Solutions
Often used abbreviations:
BTS = Base Transceiver Station (the cell tower)
ID = Identifier
LMU = Location Measurement Unit
MS = Mobile Station (the handheld)
MSC = Mobile Switching Center
PDE = Position Determining Entity
Network Location Technologies
Cell-ID: Cell Site (BTS) Identification. Most basic wireless location technology. Latitude/longitude of BTS is taken as the MS location. Available on all networks. Relative accuracy depends on size of cell. Accuracy: 100-3000m.
AOA: Angle of Arrival. This method uses multiple antennas at a BTS to determine the incident angle of an arriving signal from a MS. The information of two BTSs allow to calculate the position of the MS. This technique is very sensitive for multipath signals, that have to be accounted for. Installing and aligning antenna arrays on base stations can be a sensitive and costly process. Accuracy: 100-200m.
TDOA: Time Difference of Arrival. One of the simpler network-based methods, TDOA uses the time it takes for a signal to travel as an indirect method of calculating distance. With a minimum of three base stations receiving a signal from a handset, triangulation can determine the position of the MS. To achieve accurate positioning, the base stations must be precisely synchronized in time, which is usually done by GPS. Accuracy: 100-200m.
TOA: Time of Arrival. Similar to the TDOA technique, this technology only differs in that it uses the absolute time of arrival at a certain BTS rather than the difference between two stations. Three BTSs are required to resolve the precise position of a MS. Synchronization of the network base stations is important. Accuracy: 100-200m.
E-OTD: Enhanced Observed Time Difference. This method includes new technology in the handset to assist in locating the unit in a network. Handsets in an E-OTD system are set up to support positioning in a network where base stations are asynchronous. One implementation of this method has the handset reporting back measured times from three base stations to be combined with timing data from various points in the network (LMUs) in order to determine the MS location. Accuracy: 50-200m.
A-FLT: Advanced Forward Link Trilateration. This method of location is unique to CDMA (code-division multiple access) networks, since they are inherently synchronous in their operation. It measures the phase delay between signals sent to a pair of base stations and then compares this to the same data taken from another pair. Data of three base stations can be used to positively locate a MS. Accuracy: 50-200m.
OTDOA: Observed Time Difference of Arrival is similar to E-OTD, but may provide lower yield (percentage of successful position determinations) and operates only on UMTS networks. Accuracy: 50-200m.
Invention of A-GPS
Even before the 1996 FCC ruling about 911 emergency calls, Giovanni Vannucci of the Wireless Communication Research Department of Lucent Technology’s Bell Labs had begun thinking about the problem. He realized that it was possible to use GPS satellites to pinpoint wireless telephones making calls. Up till then GPS was considered unsuitable for wireless 911 applications (see Introduction).
Vannucci teamed up with Bob Richton of the Wireless Technology Laboratory to find a way to circumvent these problems. They came up with the W.A.G. (Wireless Assisted GPS) method, which makes use of a mobile phone with a scaled-down GPS receiver. The mobile receiver picks up signals from some of the GPS satellites that are simultaneously seen by a reference GPS receiver, connected to the wireless network.
The network sends GPS information it has picked up to the mobile handset, which uses this information to detect GPS signals from the satellites. The mobile handset then returns data about the signals it received to the network, where it is used to compute the handset’s location. Since the calculation of the exact position is done within the network, the handset doesn’t need to be complex and expensive.
Hybrid Technology
Hybrid location technology combines A-GPS with other location positioning (see above) in a way that allows the strengths of one to compensate for the weaknesses of the other to provide a more reliable and robust location solution. Common hybrids are: A-FLT/A-GPS, E-OTD/A-GPS and Cell ID/A-GPS.
The most straight-forward implementation of Hybrid technology for GSM, GPRS and UMTS networks is to combine A-GPS with Cell ID. This improves yield in areas where A-GPS cannot produce position information and provides the accuracy of A-GPS in all other cases. A-GPS coverage and accuracy is typically excellent just about anywhere a subscriber can go, degrading only deep inside buildings or in dense urban areas where Cell ID may still be able to produce a position.
Typically, these are areas where cell density is high, so Cell ID will be at the more desirable end of its accuracy range, though it will not be as accurate as A-GPS.
A-GPS requires precise time to perform satellite signal processing. It can utilize precise time from a synchronized network (which provides optimized TTFF and sensitivity), or derive it on either a synchronized or an asynchronous network from aiding data received from the Location Server. A-GPS operates on any air interface network, synchronized or not, without requiring any costly equipment to derive time, and will operate with enhanced efficiency and performance on precisely synchronized networks.
:!: E, ovo dalje je vrlo bitno, jer upravo objašnjava kolika je prednost u odnosu na samostalan GPS uređaj :!:
A combination of two complementary technologies
What makes Assisted-GPS work so well is that the wireless network, using its own GPS receivers, as well as an estimate of the handset’s location down to cell/sector, can predict with great accuracy the GPS signal the handset will receive and send that information to the handset. With this assistance the size of the search space is greatly reduced and the time-to-first-fix (TTFF) shortened from minutes to seconds. In addition, an A-GPS receiver in the handset can detect and demodulate signals that are order of magnitude weaker than those required by conventional GPS receivers.
An example is SnapTrack’s hybrid A-GPS location solution, which takes advantage of the complementary nature of both network and GPS solutions by using both cellular/wireless network information and the satellite-based GPS information to directly improve the positioning availability, sensitivity, accuracy and time-to-fix. By combining the two information sources, SnapTrack’s hybrid solution can provide a position fix with as few as one satellite and one cell site.
A sad malo vesti u proteklih par dana, da potkrepe celu priču:
12.01.2005.: SiRF Technology Holdings, Inc., a leading provider of GPS-enabled location technology, announced its patented, high performance SiRFLoc MultiMode aided-GPS technology has been licensed by Research In Motion (RIM) for use with the SiRFstarIIe/LP chipset. RIM's BlackBerry 7520 device incorporates GPS technology from SiRF to help support a wide range of location, tracking and navigation applications.
11.01.: The Siemens Communications Group has developed a new solution for the Assisted Global Positioning System (A-GPS) which will allow mobile operators to integrate the new navigation technology into their mobile networks far quicker than before. T-Mobile Czech Republic a.s. is currently testing the Siemens solution in Prague. The terminal used is the SX1 phone from Siemens which was fitted with an A-GPS chip specially for the field trials. Siemens' IP-based A-GPS solution will be on the market from the 3rd quarter of 2005. Current standardized A-GPS solutions require costly intervention in the mobile network, as the infrastructure has to be adapted to the 3GPP Location Services standard. The IP (Internet Protocol)-based A-GPS solution from Siemens, on the other hand, comprises a special location server that can be integrated directly into the mobile network and communicates with the mobile terminal via an IP connection.
Ima još!
07.01. Reflecting the trend towards the increased integration of connectivity and mobility, Nokia has dedicated the majority of its consumer Electronics Show (CES) 2005 booth space to in-vehicle products, including wireless car kits, Bluetooth-enabled GPS receivers and Nokia hands free solutions for the auto industry. In addition to in-vehicle devices, other exciting Nokia accessories and peripherals will be on hand. Nokia will also be highlighting its new battery authentication program, designed to give consumers a way to differentiate original Nokia batteries from potentially unsafe counterfeit batteries. On the show floor, Nokia is displaying a 2005 Land Rover LR3 with Integrated Bluetooth Phone System that allows a compatible phone to be controlled via a vehicle keypad, voice recognition or steering wheel controls. Also on display is a new Mini Cooper with a Nokia Wireless Car Kit CK-7W installed. Fully hidden from view, except for a tastefully designed dash- mounted control button, the Nokia Wireless Car Kit demonstrates the seamless aftermarket installation that is possible, even in the most diminutive of vehicles.
05.01. Garmin International Inc., a unit of Garmin Ltd. , introduced the GPS 10, a sensor that receives location data from the Global Positioning System (GPS) and transmits that information to mobile devices enabled with Bluetooth wireless technology. The GPS 10 is compact (WxHxD: 1.8" x 3.5" x 0.8") and lightweight (2.8 oz.). It integrates a 12-parallel channel, WAAS-enabled GPS receiver and a Bluetooth transceiver to provide location data to a variety of mobile devices. The GPS 10 has a magnetic base and is waterproof, so it can be mounted inside or outside a vehicle. The sensor has an internal lithium-ion battery and the Deluxe package includes a 12-volt adapter, allowing the GPS 10 to run on its own power for up to 10 hours or on the vehicle's power.
E, dosta je bilo... možda vam ovo pomogne da shvatite koliko je lako pronaći ukraden telefon, samo kad neko hoće da se potrudi...
Ali se istovremeno ježim od pomisli da će u budućnosti na ovome biti zasnovan neki čip koji će se implantirati u ljude... brrr...
Današnji GPS je značajno integrisan u mobilnu telefoniju širom sveta, i rapidno se širi dalje i unapređuje. Predviđa se da će u narednih par godina većina telefona imati ugrađen i GPS prijemnik, i to ne loše i neprecizne prijemnike kakvi se obično nalaze u kojekakvim prenosnim spravicama, već će takva GSM/GPS kombinacija (pominjem samo GSM a odnosi se na sve postojeće mreže - GSM/GPRS, WCDMA (UMTS) i CDMA2000) morati da omogući lociranje u najtežim uslovima (podzemne garaže, betonske zgrade, kanjoni, itd.) (a Straževica?
). Potražnja tržišta za ovakvim uređajima je ogromna, mnogo veća nego za klasičnim GPS, što navodi mnoge proizvođače da se pozabave ovim.Hardver (samo deo onoga što trenutno postoji):
Starija varijanta čipseta zvanog "Global Locate A-GPS chip-set" u sebi ima preko 20.000 korelatora, što mu omogućava da odradi velike proračune i da pronalazi satelite kojima je nivo signala ispod -158dBm, potrošnja mu je minimalna, a interval korekcije oko 250 milisekundi.
Najnovija varijanta čipseta "SiRFStar III" ima oko 200.000 korelatora i osetljivost od -159dBm. SiRFSoft GPS arhitektura omogućava integraciju u sve moguće prenosne uređaje (Intel XScale, OMAPI, PDA, GSM/Cell/Smart telefone, itd).
Rezultat ovakvog spoja - stotine miliona ljudi će u svakom trenutku kod sebe imati GPS prijemnik izvanrednih mogućnosti i karakteristika. Kako su zgodno napisali na jednom sajtu - "GPS and GSM go together".
Ovo datira od marta 2004.: "With a GPS phone you can tell your exact location and with the right service of the phone operator you can even project your position on a map in your friend’s cell phone. The service will tell you where you could meet and by which route to get there."
Ovo su neki od 3G telefona koji imaju GPS - Motorola A835, A920 i A925, NEC e313 i e616, zatim "World cell phones" - Motorola A840 i LG W800, pa Nokia modeli - 5140 (Xpress-on GPS Shell), komunikatori od modela 9210 uz pomoć add-on modula LAM-1, Motorola iDEN i58sr/i88s/i710/i730/i830 na Kanadskoj Telus mreži, Nextel i58sr, i88s, i530 i i730 (TeleType), itd.
U zemljama gde postoje "Locate Services", mobilni telefon može da odredi gde se nalazite i da prikaže mapu na ekranu, zatim, ukucate odredište i dobićete označenu rutu od polaznog mesta, tačno vas navodeći kuda treba da idete. U Engleskoj, pored opcije "od tačke A do tačke B", postoji još i "My Nearest" (pronalazi najbliže banke, bankomate, prodavnice, restorane, pumpe, itd.), zatim "Business Finder" za pronalaženje raznih firmi i preduzeća i "Quick Map" - kompletan adresar Engleske (deo ovoga je već pušten kod nas u nekoj varijanti).
U jednom od ranijih postova sam objašnjavao kako radi GPS, a ovo neću prevoditi, vežbajte malo engleski:
A-GPS explained in historical context
Introduction to Assisted-GPS (A-GPS)
When the U.S. Federal Communications Commission (FCC) in 1996 ordered that cellular phone carriers had to route 911 calls to a Public Safety Answering Point (PSAP) with Automatic Location Identification (ALI), it recognized that, at that time, technology did not exist that could provide detailed caller-location information.
Handsets with a GPS receiver incorporated seemed excluded, because
- after launching a 911 emergency call it would take the receiver several minutes to establish a fix (cold start) and being able to output the caller’s location co-ordinates
- GPS would have a very poor performance in too many situations (indoors, under dense foliage, in (urban) canyons, etc).
- a GPS receiver would drain too much power from the handset
- incorporating a GPS receiver in the handset would be far too expensive and too bulky.
Network-based Solutions
Often used abbreviations:
BTS = Base Transceiver Station (the cell tower)
ID = Identifier
LMU = Location Measurement Unit
MS = Mobile Station (the handheld)
MSC = Mobile Switching Center
PDE = Position Determining Entity
Network Location Technologies
Cell-ID: Cell Site (BTS) Identification. Most basic wireless location technology. Latitude/longitude of BTS is taken as the MS location. Available on all networks. Relative accuracy depends on size of cell. Accuracy: 100-3000m.
AOA: Angle of Arrival. This method uses multiple antennas at a BTS to determine the incident angle of an arriving signal from a MS. The information of two BTSs allow to calculate the position of the MS. This technique is very sensitive for multipath signals, that have to be accounted for. Installing and aligning antenna arrays on base stations can be a sensitive and costly process. Accuracy: 100-200m.
TDOA: Time Difference of Arrival. One of the simpler network-based methods, TDOA uses the time it takes for a signal to travel as an indirect method of calculating distance. With a minimum of three base stations receiving a signal from a handset, triangulation can determine the position of the MS. To achieve accurate positioning, the base stations must be precisely synchronized in time, which is usually done by GPS. Accuracy: 100-200m.
TOA: Time of Arrival. Similar to the TDOA technique, this technology only differs in that it uses the absolute time of arrival at a certain BTS rather than the difference between two stations. Three BTSs are required to resolve the precise position of a MS. Synchronization of the network base stations is important. Accuracy: 100-200m.
E-OTD: Enhanced Observed Time Difference. This method includes new technology in the handset to assist in locating the unit in a network. Handsets in an E-OTD system are set up to support positioning in a network where base stations are asynchronous. One implementation of this method has the handset reporting back measured times from three base stations to be combined with timing data from various points in the network (LMUs) in order to determine the MS location. Accuracy: 50-200m.
A-FLT: Advanced Forward Link Trilateration. This method of location is unique to CDMA (code-division multiple access) networks, since they are inherently synchronous in their operation. It measures the phase delay between signals sent to a pair of base stations and then compares this to the same data taken from another pair. Data of three base stations can be used to positively locate a MS. Accuracy: 50-200m.
OTDOA: Observed Time Difference of Arrival is similar to E-OTD, but may provide lower yield (percentage of successful position determinations) and operates only on UMTS networks. Accuracy: 50-200m.
Invention of A-GPS
Even before the 1996 FCC ruling about 911 emergency calls, Giovanni Vannucci of the Wireless Communication Research Department of Lucent Technology’s Bell Labs had begun thinking about the problem. He realized that it was possible to use GPS satellites to pinpoint wireless telephones making calls. Up till then GPS was considered unsuitable for wireless 911 applications (see Introduction).
Vannucci teamed up with Bob Richton of the Wireless Technology Laboratory to find a way to circumvent these problems. They came up with the W.A.G. (Wireless Assisted GPS) method, which makes use of a mobile phone with a scaled-down GPS receiver. The mobile receiver picks up signals from some of the GPS satellites that are simultaneously seen by a reference GPS receiver, connected to the wireless network.
The network sends GPS information it has picked up to the mobile handset, which uses this information to detect GPS signals from the satellites. The mobile handset then returns data about the signals it received to the network, where it is used to compute the handset’s location. Since the calculation of the exact position is done within the network, the handset doesn’t need to be complex and expensive.
Hybrid Technology
Hybrid location technology combines A-GPS with other location positioning (see above) in a way that allows the strengths of one to compensate for the weaknesses of the other to provide a more reliable and robust location solution. Common hybrids are: A-FLT/A-GPS, E-OTD/A-GPS and Cell ID/A-GPS.
The most straight-forward implementation of Hybrid technology for GSM, GPRS and UMTS networks is to combine A-GPS with Cell ID. This improves yield in areas where A-GPS cannot produce position information and provides the accuracy of A-GPS in all other cases. A-GPS coverage and accuracy is typically excellent just about anywhere a subscriber can go, degrading only deep inside buildings or in dense urban areas where Cell ID may still be able to produce a position.
Typically, these are areas where cell density is high, so Cell ID will be at the more desirable end of its accuracy range, though it will not be as accurate as A-GPS.
A-GPS requires precise time to perform satellite signal processing. It can utilize precise time from a synchronized network (which provides optimized TTFF and sensitivity), or derive it on either a synchronized or an asynchronous network from aiding data received from the Location Server. A-GPS operates on any air interface network, synchronized or not, without requiring any costly equipment to derive time, and will operate with enhanced efficiency and performance on precisely synchronized networks.
:!: E, ovo dalje je vrlo bitno, jer upravo objašnjava kolika je prednost u odnosu na samostalan GPS uređaj :!:
A combination of two complementary technologies
What makes Assisted-GPS work so well is that the wireless network, using its own GPS receivers, as well as an estimate of the handset’s location down to cell/sector, can predict with great accuracy the GPS signal the handset will receive and send that information to the handset. With this assistance the size of the search space is greatly reduced and the time-to-first-fix (TTFF) shortened from minutes to seconds. In addition, an A-GPS receiver in the handset can detect and demodulate signals that are order of magnitude weaker than those required by conventional GPS receivers.
An example is SnapTrack’s hybrid A-GPS location solution, which takes advantage of the complementary nature of both network and GPS solutions by using both cellular/wireless network information and the satellite-based GPS information to directly improve the positioning availability, sensitivity, accuracy and time-to-fix. By combining the two information sources, SnapTrack’s hybrid solution can provide a position fix with as few as one satellite and one cell site.
A sad malo vesti u proteklih par dana, da potkrepe celu priču:
12.01.2005.: SiRF Technology Holdings, Inc., a leading provider of GPS-enabled location technology, announced its patented, high performance SiRFLoc MultiMode aided-GPS technology has been licensed by Research In Motion (RIM) for use with the SiRFstarIIe/LP chipset. RIM's BlackBerry 7520 device incorporates GPS technology from SiRF to help support a wide range of location, tracking and navigation applications.
11.01.: The Siemens Communications Group has developed a new solution for the Assisted Global Positioning System (A-GPS) which will allow mobile operators to integrate the new navigation technology into their mobile networks far quicker than before. T-Mobile Czech Republic a.s. is currently testing the Siemens solution in Prague. The terminal used is the SX1 phone from Siemens which was fitted with an A-GPS chip specially for the field trials. Siemens' IP-based A-GPS solution will be on the market from the 3rd quarter of 2005. Current standardized A-GPS solutions require costly intervention in the mobile network, as the infrastructure has to be adapted to the 3GPP Location Services standard. The IP (Internet Protocol)-based A-GPS solution from Siemens, on the other hand, comprises a special location server that can be integrated directly into the mobile network and communicates with the mobile terminal via an IP connection.
Ima još!
07.01. Reflecting the trend towards the increased integration of connectivity and mobility, Nokia has dedicated the majority of its consumer Electronics Show (CES) 2005 booth space to in-vehicle products, including wireless car kits, Bluetooth-enabled GPS receivers and Nokia hands free solutions for the auto industry. In addition to in-vehicle devices, other exciting Nokia accessories and peripherals will be on hand. Nokia will also be highlighting its new battery authentication program, designed to give consumers a way to differentiate original Nokia batteries from potentially unsafe counterfeit batteries. On the show floor, Nokia is displaying a 2005 Land Rover LR3 with Integrated Bluetooth Phone System that allows a compatible phone to be controlled via a vehicle keypad, voice recognition or steering wheel controls. Also on display is a new Mini Cooper with a Nokia Wireless Car Kit CK-7W installed. Fully hidden from view, except for a tastefully designed dash- mounted control button, the Nokia Wireless Car Kit demonstrates the seamless aftermarket installation that is possible, even in the most diminutive of vehicles.
05.01. Garmin International Inc., a unit of Garmin Ltd. , introduced the GPS 10, a sensor that receives location data from the Global Positioning System (GPS) and transmits that information to mobile devices enabled with Bluetooth wireless technology. The GPS 10 is compact (WxHxD: 1.8" x 3.5" x 0.8") and lightweight (2.8 oz.). It integrates a 12-parallel channel, WAAS-enabled GPS receiver and a Bluetooth transceiver to provide location data to a variety of mobile devices. The GPS 10 has a magnetic base and is waterproof, so it can be mounted inside or outside a vehicle. The sensor has an internal lithium-ion battery and the Deluxe package includes a 12-volt adapter, allowing the GPS 10 to run on its own power for up to 10 hours or on the vehicle's power.
E, dosta je bilo... možda vam ovo pomogne da shvatite koliko je lako pronaći ukraden telefon, samo kad neko hoće da se potrudi...
Ali se istovremeno ježim od pomisli da će u budućnosti na ovome biti zasnovan neki čip koji će se implantirati u ljude... brrr...
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Miškoni
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Naravno da ne mora da se pamti, ovo je čisto informativno. A razvoj tih hibrida je omogućio da se implementiraju u mobilne spravice, a da pritom ne opterećuju sam uređaj proračunima, koji su vrlo zahtevni, mala im je potrošnja kao i dimenzije, i mogu da se koriste u već postojećim modelima, kao što je, na primer, SX1, koji se ovih dana testira. Zgodno je što što Siemens gura ceo projekat, jer Telekom koristi njihovu opremu, pa će (nadam se) i kod nas to biti dostupno uskoro...
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1. Nisu prorachuni glavni problem. Potroshnja napajanja (baterije) je jako problematichno kod GPS uredjaja. Uredjaju je potreban LOS zona (line of sight) prema minimalo 4 satelita kako bi pravilno bilo izvrsheno pozicioniranje. Kako se sateliti krecu neki izlaze iz LOS-a dok drugi u njega ulaze. Potrebno je izvrshiti handover izmedju satelita (na isti nachin kao kada u GSM-u prelazite iz celije u celiju). Rezultat je da vishe puta u toku 10 minuta uredjaj mora da se prilagodjava uslovima u orbiti / atmosferi. Samim time mnogo baterije se troshi na adaptiranje prijemnika (kodne sekvence, pojachavacha, sinhronizaciju itd.) A-GSM ima zadatak da i to koriguje. On (pored pomoci u proracunima) saopshtava mobilnom prijemniku na koje kodne sekvence da se sinhronizuje, samim time koje satelite "vidi" mobilni prijemnih sa lokacije na kojoj se nalazi (ovo je samo gruba procena lokacije bazirana na to kojoj celiji mobilni uredjaj pripada CELL-ID mretoda.) Na taj nachin nema "pretrazivanja neba" koje najvishe "jede bateriju". Naravno kada neki sateliti odu u fade-out A-GPS javlje prijemniku na koji satelit da se sada "nakachi" tako da ni tada nema pretrazivanja.
2. D-GPS je stvarno prava stvar (diferencijalni GPS) ali o tome sutra.
2. D-GPS je stvarno prava stvar (diferencijalni GPS) ali o tome sutra.
D-GPS je nastao kao rezultat dve ozbiljne mane koje GPS poseduje.
1. Politichke prirode : vlasnik GPS-a je Ministarstvo odbrane SAD-a !!! Kako se mnogim drzavama ideja o oslanjanju na sistem koji je u vlasnishtvu "chudljive" super-sile nije nimalo svidjao odluchili su se za pokushaj modifikacije. Glavni problem je shto sistem samo takozvanim P korisnicima (GPS-P "precizni") garantuje tachni podatci o polozaju. Komercijalni korisnici (chitaj svi koji nisu saveznici SAD-a i ministarstva odbrane SAD-a) NEMAJU garanciju da ce njihov GPS-S (standard - standardni) uvek davati tachne podatke kako o polozaju tako i o tachnom vremenu. Greshke se mogu ubaciti u sistem (i ubacuju se u sistem) shto su svi sa GPS prijemnikom mogli da uvere '99). Standardna devijacija takve greshke lako moze biti i do 200 metara !!!
2. Tehnichke prirode : je rezultat prirode prostiranja radio talasa od satelita. Na putanji chesto dolazi do povijanja (Refrakcija), odbijanja (Refleksija) i rasipanja (Difrakcija) radio talasa. Sve to utiche na tachnost odredjivanja polozaja. Zato se i uvodi RRD korekcija u GPS ali problem je shto se ona moze uvesti samo kod jako slozenih prijemnika koji prate SVE satelite u LOS-u, njihove signale obradjuju odvojeno - a ne sekvencijalno, i naravno za merenje takvim uredjajem je potrebno vreme (moze se dobiti tachost i od par centimetara ako se merenje vrshe NEDELJU DANA)
Kao rezultat ovih problema nastao je koncept diferencijalnog GPS-a. Koncept D-GPS-a se bazira na ideji da se na teritoriji koja je od interesa postave stanice za korekciju (SZK). One se postavljaju na mestima chije su geografske kordinate poznate (merene su RDD korigovanim GPS-om). Poshto SZK "zna" gde je ona, u stanju je da merenjem parametara uz pomoc GPS prijemnika slabijeg kvaliteta dobije podatak koliko GPS-S greshi za datu teritoriju ! Na taj nachin SZK moze da "javi" korisnicima koliko, za koju vrednost, i u kom pracu i smeru, se vrednost na njihovim prijemnicima razlikuje od one koja je tachna. Time se svaka greshka u sistemu (shumna, propagaciona ili namerna) moze detektovati i korigovati BEZ OBZIRA na stanje u atmosferi ili malicioznost vlasnika podatak se moze emitovati kontinualno putem odvojenog radio kanala ili sa prekidima putem npr.SMS-a koji do prijemnika stize sa nekom uchestanoshcu (od 1 do 60 puta na sat). Ono shto je zgodno je da jedna stanica moze kvalitetno i pouzdano da opsluzuje korisnike na dosta shirokom podruchiju reda 100, cak i 200 km (ma da je 200 cifra za teritorije sa slabom oblachnosti).
1. Politichke prirode : vlasnik GPS-a je Ministarstvo odbrane SAD-a !!! Kako se mnogim drzavama ideja o oslanjanju na sistem koji je u vlasnishtvu "chudljive" super-sile nije nimalo svidjao odluchili su se za pokushaj modifikacije. Glavni problem je shto sistem samo takozvanim P korisnicima (GPS-P "precizni") garantuje tachni podatci o polozaju. Komercijalni korisnici (chitaj svi koji nisu saveznici SAD-a i ministarstva odbrane SAD-a) NEMAJU garanciju da ce njihov GPS-S (standard - standardni) uvek davati tachne podatke kako o polozaju tako i o tachnom vremenu. Greshke se mogu ubaciti u sistem (i ubacuju se u sistem) shto su svi sa GPS prijemnikom mogli da uvere '99). Standardna devijacija takve greshke lako moze biti i do 200 metara !!!
2. Tehnichke prirode : je rezultat prirode prostiranja radio talasa od satelita. Na putanji chesto dolazi do povijanja (Refrakcija), odbijanja (Refleksija) i rasipanja (Difrakcija) radio talasa. Sve to utiche na tachnost odredjivanja polozaja. Zato se i uvodi RRD korekcija u GPS ali problem je shto se ona moze uvesti samo kod jako slozenih prijemnika koji prate SVE satelite u LOS-u, njihove signale obradjuju odvojeno - a ne sekvencijalno, i naravno za merenje takvim uredjajem je potrebno vreme (moze se dobiti tachost i od par centimetara ako se merenje vrshe NEDELJU DANA)
Kao rezultat ovih problema nastao je koncept diferencijalnog GPS-a. Koncept D-GPS-a se bazira na ideji da se na teritoriji koja je od interesa postave stanice za korekciju (SZK). One se postavljaju na mestima chije su geografske kordinate poznate (merene su RDD korigovanim GPS-om). Poshto SZK "zna" gde je ona, u stanju je da merenjem parametara uz pomoc GPS prijemnika slabijeg kvaliteta dobije podatak koliko GPS-S greshi za datu teritoriju ! Na taj nachin SZK moze da "javi" korisnicima koliko, za koju vrednost, i u kom pracu i smeru, se vrednost na njihovim prijemnicima razlikuje od one koja je tachna. Time se svaka greshka u sistemu (shumna, propagaciona ili namerna) moze detektovati i korigovati BEZ OBZIRA na stanje u atmosferi ili malicioznost vlasnika
podatak se moze emitovati kontinualno putem odvojenog radio kanala ili sa prekidima putem npr.SMS-a koji do prijemnika stize sa nekom uchestanoshcu (od 1 do 60 puta na sat). Ono shto je zgodno je da jedna stanica moze kvalitetno i pouzdano da opsluzuje korisnike na dosta shirokom podruchiju reda 100, cak i 200 km (ma da je 200 cifra za teritorije sa slabom oblachnosti).
Kopte3, dame imaju prednost (specijalno ako su prve napisale post). 
Osim toga objashnjenje je vishe nego iscrpno na Nokia site-u. Evo linkova
Objashnjenje tehnologije:
http://www.nokia.com/nokia/0,,48542,00.html
Objashnjenje upotrebne vrednosti:
http://www.nokia.com/nokia/0,8764,43089,00.html
Osim toga objashnjenje je vishe nego iscrpno na Nokia site-u. Evo linkovaObjashnjenje tehnologije:
http://www.nokia.com/nokia/0,,48542,00.html
Objashnjenje upotrebne vrednosti:
http://www.nokia.com/nokia/0,8764,43089,00.html
1. Ma sa tim GPS-om vishe shtete nego koristi. Problem je u politici (naravno). Posle svih Iraka, Avganistana SAD-u niko ne veruje. Posebno shto se krajem 2008 ochekuje komercijalna primena GALILEO sistema (EU "odgovor" na GPS) mada se to moze dogoditi i ranije poshto se "isprechio bizaran problem"- PREVELIKO FINANSIRANJE . Trenutno je budzet Galileo sistema 143% od predvidjenog !!! Sada se javio problem kako prerasporediti akcije tako da svi budu zadovoljni (i da se istovremeno ne dogodi da neka od EU chlanica kaze: "Kako mi dobijamo 30 procenata profita / akcija, a uplatili smo 35).
2. Misterija koja tek cheka da bude reshena je GLONASS (bivshi SSSR sada Ruski sistem za navigaciju). Po informacijama koje su procurele navodno je nekoliko puta bolji od ekvivalenata, specijalno u trecoj dimenziji (visini) koja je slaba tachka konkurenata (GPS vam moze obezbediti i par metara u geografskoj shirini i duzini ali je sklon je da "shtuca" i po 10-100m u nadmorskoj visini !!!). Sad shta su Rusi tu "budzili" - ko ce ga znati. Ono shto je najgore dugo se prichalo da sistem nikada nije kompletiran dok se nije saznalo da kompletan sistem treba da ima 40 SATELITA u 8 orbita (GSM ima 21 plus 3 "vruche rezerve" u 6 orbita) Chemu toliki broj satelita ? O komercijalizaciji celog sistema se pricha vec godinama ali nishta "chvrsto" uradjeno. Ukaz kojim se cela stvar moze komercijalno distribuirati je potpisao josh Jeljcin !!!
3. Vest koja je izazvala senzaciju je da nekoliko proizvodjacha zeli da implementira "trosistemske" prijemnike koji ce koristiti podatke sa sva tri sistema !!! Kako ? Zashto ? Na koji nachin a da cela stvar ne koshta MNOGO ? Vreme ce pokazati.
. Trenutno je budzet Galileo sistema 143% od predvidjenog !!! Sada se javio problem kako prerasporediti akcije tako da svi budu zadovoljni (i da se istovremeno ne dogodi da neka od EU chlanica kaze: "Kako mi dobijamo 30 procenata profita / akcija, a uplatili smo 35). 2. Misterija koja tek cheka da bude reshena je GLONASS (bivshi SSSR sada Ruski sistem za navigaciju). Po informacijama koje su procurele navodno je nekoliko puta bolji od ekvivalenata, specijalno u trecoj dimenziji (visini) koja je slaba tachka konkurenata (GPS vam moze obezbediti i par metara u geografskoj shirini i duzini ali je sklon je da "shtuca" i po 10-100m u nadmorskoj visini !!!). Sad shta su Rusi tu "budzili" - ko ce ga znati. Ono shto je najgore dugo se prichalo da sistem nikada nije kompletiran dok se nije saznalo da kompletan sistem treba da ima 40 SATELITA u 8 orbita (GSM ima 21 plus 3 "vruche rezerve" u 6 orbita) Chemu toliki broj satelita ? O komercijalizaciji celog sistema se pricha vec godinama ali nishta "chvrsto" uradjeno. Ukaz kojim se cela stvar moze komercijalno distribuirati je potpisao josh Jeljcin !!!
3. Vest koja je izazvala senzaciju je da nekoliko proizvodjacha zeli da implementira "trosistemske" prijemnike koji ce koristiti podatke sa sva tri sistema !!! Kako ? Zashto ? Na koji nachin a da cela stvar ne koshta MNOGO ? Vreme ce pokazati.
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Miškoni
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Evo, da malo oživim staru ali uvek aktuelnu temu...
Tekst je preuzet sa www.itsvet.com
Prva svemirska letilica u okviru Evropskog sistema za satelitsku navigaciju, Galileo, je ostvarila značajan korak u pravcu obezbeđivanja alociranih frekvencija mreže. Giove-A je u četvrtak izvršila prenos prvog navigacionog signala do zemaljskih stanica u Velikoj Britaniji i Belgiji. Satelit koji je napravljen u Velikoj Britaniji je lansiran 28. decembra sa Kosmodroma Baikonur u Kazahstanu. Nova mreža treba da omogući Evropi razvoj sopstvene verzije Sistema za globalno pozicioniranje SAD. Givoe-A se nalazi u orbiti nekih 23 000 km iznad Zemljine površine. U roku od nekoliko sati nakon lansiranja, inženjeri kompanije Surrey Satellite Technology Ltd. (SSTL) su započeli sa aktiviranjem njenih funkcija i obezbeđenjem pune operativnosti. U četvrtak je prvi put poslat signal sistema Galileo iz svemira ka Zemlji.
Tekst je preuzet sa www.itsvet.com
Prva svemirska letilica u okviru Evropskog sistema za satelitsku navigaciju, Galileo, je ostvarila značajan korak u pravcu obezbeđivanja alociranih frekvencija mreže. Giove-A je u četvrtak izvršila prenos prvog navigacionog signala do zemaljskih stanica u Velikoj Britaniji i Belgiji. Satelit koji je napravljen u Velikoj Britaniji je lansiran 28. decembra sa Kosmodroma Baikonur u Kazahstanu. Nova mreža treba da omogući Evropi razvoj sopstvene verzije Sistema za globalno pozicioniranje SAD. Givoe-A se nalazi u orbiti nekih 23 000 km iznad Zemljine površine. U roku od nekoliko sati nakon lansiranja, inženjeri kompanije Surrey Satellite Technology Ltd. (SSTL) su započeli sa aktiviranjem njenih funkcija i obezbeđenjem pune operativnosti. U četvrtak je prvi put poslat signal sistema Galileo iz svemira ka Zemlji.
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fain2daniel
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