H2O, 15 Jul 2008Nokia Websit said E66 with A-GPS only but gsmarena.com said with GPS and A-GPS? which is corre... morentroduction to Assisted-GPS (A-GPS)
The original meaning of A-GPS was different than today's
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.
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 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.
Alex, 16 Jul 2008Hmm... anyone can tell that what is that VoIP?? i need to know it please .... thanks VoIP, Voice over Internet Phone
VoIP free phonecalls, 14 Jul 2008Can I make phonecalls to a mobile free? I have VoIP in my office and home. So, if everyone has... moreyou can make free calls but your company must be paying for that....
by the way its rather cheaper call than any other phone calls.
Alex, 16 Jul 2008Hmm... anyone can tell that what is that VoIP?? i need to know it please .... thanks VOIP stands for voice over Internet Protocol.
This features enables you to make cheap internet calls...either using wifi internet access point or GPRS/EDGE/HSDPA.
A huge gallery of pictures taken with the E66:
I've just got my E66 over lunch time, here are the photos :
I Heart it alot =)
Hmm... anyone can tell that what is that VoIP?? i need to know it please .... thanks
R8: So if you already bought this phone, tell us sth about this phone. I just want to know 2 things: 1) how is battery life?? 2) How is sound...i mean loudness of speaker while playing music?? I don't see speaker grill in this phone.
I'd like to buy too when it's available.
Nokia Websit said E66 with A-GPS only but gsmarena.com said with GPS and A-GPS? which is correct one? please help...Thanks
Can the GPS for E71 be used with Route 66 instead of Nokia Maps ? Which phone GPS uses Route 66 ?
Do I have to pay for GPS on this phone?? Please help me make a decission to buy a phone which will also replace my TomTom and Digi camera. Thanks
where is e66. i want it. i love nokia phones. today using e51 loving it but not as good as e65 which i used earlier. this must be upgrade rdgs ranjeet
I dont know but in Baltic states You can get E66 in internet shop about 450 EUR.
Hi to all n0kia fanatic,,jus want to ask base on your opini0n which 0ne is better N95 or E66?,, i just want to have a sec0nd opini0n with regards to ph0ne spec.
,,thanks advance 4 ol d pe0ple who c0uld share to me their experience?,,
Can I make phonecalls to a mobile free? I have VoIP in my office and home. So, if everyone has Nokia E66 (which has VoIP) it means that we can make all our calls FREE !!
Finally in the mail, get it tomorrow. This is the perfect phone for me. BTW; Norway here as well :)
R8 is lying. I am also from Norway....where is E66??? And you are wrong that norwaygean gets the first.
I got the E66 yesterday.Its the best NOKIA ever.GPS its perfect,and the new menues are greate!! I love it.By the way i live in Norway,and we always get the new phones first!!!