u-blox ANTARIS 4 User Manual


your position is our focus
4.5.5 AssistNow
®
Online
AssistNow
®
Onlineisu-blox'end-to-endAssistedGPS(A-GPS)solutionthatboostsGPSacquisitionperformance,
bringing Time To First Fix (TTFF) down to seconds. The system works by accessing assistance data such as
Ephemeris, Almanac and accurate time from our Global Reference Network of globally placed GPS receivers.
With A-GPS, the receiver
can acquire satellites and provide accurate position data instantly on demand, even
underpoorsignalconditions.
Global Re ncefere
Network
AssistNow Online
Root Server
AssistNow Online
Client
AssistNow Online Proxy Server
AssistNow Online DirectAccess
AssistNow
Online Proxy Access
u - blox
ReferenceReceivers
u - blox
DataCenter
Customer

DataCenter
User’s
MobileTerminal
Built -inorconnected
GPSReceiver

u-blox binary
protocol
Customer specific implementation

F ow
®
Online Framewo
AssistNow
®
 Online makes use of ne communication and open standards such as TCP/IP.Therefore,it
w com and
Wireless LAN. No special arrange h mobile network operators toenable AssistNow
O
 Note:
®
rece
4.5.6 AssistNow line
AssistNow
®
OfflineisanA-GPSse Sacquisitionperformance,bringingTimeToFirstFix(TTFF)
d istN ed for
connectivityatstart-up.

T worksbyusingAlman speedupacquisition,enablinga
p fix within seconds. User sional Internet downloads, at the user's
igure 78: AssistN rk
User Pla
orksonallstandardmobile municationnetworksthatsupportInternetaccess,includingGPRS,UMTS
ments need to be made wit
nline.
AllANTARIS
4GPS iverssupportAssistNow Online.
®
®
Off
rvicethatboostsGP
own to seconds. Unlike Ass ow Online, this solution enables instant positioning without the ne
hesystem acPlus
®
differentialalmanaccorrectiondatato
osition s access the data by means of occa
convenience.
AssistNow Offline
Root Server
Global Reference
Network
Mobile Terminals
AssistNow Offline Clients
IGS- International
GNSS Service
u-blox
DataCenter
Enduser
MobileTermi
's
nal
Built-inorconnected
GPSReceiver
Data CompressionData Ge on Download tonerati GPS Receiver
Regular updates
(min 3 x / day)
Standard Mirror
or Proxy Server
TCP/IP TCP/IP
OEM
DataCenter
Data Replication
HTTPrequest Datatransfer
Individual
Data Accesses

Figure 79: AssistNow
®
Offline Framework
GPSModules-SystemIntegrationManual(SIM)(incl.ReferenceDesign) ReceiverDescription
GPS.G4-MS4-05007-A1
  Page 92

u-blox ANTARIS 4 Specifications

General

Brand	u-blox
Model	ANTARIS 4
Category	GPS
Language	English