High-Speed Downlink Packet Access (HSDPA) is a 3G (third generation) Mobile Telephony Communications Protocol in the High-Speed Packet Access (HSPA) family,which allows networks based on Universal Mobile Telecommunications System (UMTS) to have higher data transfer speeds and capacity.Current HSDPA deployments support down-link speeds of 1.8, 3.6, 7.2 and 14.4 Mbit/s,and can provide each customer with [...]
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General Packet Radio Service (GPRS) is a Mobile Data Service available to users of Global System for Mobile Communications (GSM) and IS-136 Mobile phones.GPRS data transfer is typically charged per megabyte of transferreddata,while data communication via traditional circuit switching is billed per minute of connection time,independent of whether the user has actually transferred data [...]
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The Global Positioning System (GPS) is the only fully functional Global navigation satellite system(GNSS).Utilizing a constellationof at least 24 medium earth orbit satellite that transmit precise microwave signals,the system enables a GPS recevier to determine its location,speed/direction, and time.
Developed by the United states Departement of Defense,it is officially named NAVSTAR GPS (Contrary to popular [...]
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