There is only one letter difference between GPRS vs GPS, which is easy for users to misunderstand. Today we find out the meaning and function of GPRS vs GPS through comparison.
1. GPRS vs GPS Concept
1.1 GPS Concept: The concept of GPS: GPS is the English abbreviation of GlobalPositioningSystem, and the Chinese abbreviation is "globalpositioningsystem". GPS is a new generation of space satellite navigation and positioning system jointly developed by the US Army, Navy and Air Force in the 1970s. GPS function must have three elements: GPS terminal, transmission network, monitoring platform. These three elements are indispensable; through these three elements, functions such as vehicle anti-theft, anti-robbery, driving route monitoring, and call command can be provided.
The GPS space part is mainly composed of 24 GPS satellites, including 21 working satellites and 3 spare satellites. Twenty-four satellites operate in six orbital planes for a period of 12 hours. It is guaranteed that more than 4 satellites can be observed at any time and anywhere at an altitude angle of more than 15 degrees.
This system orbits the Earth continuously for 11 hours and 58 minutes, providing us with pictures and data. Although it is 12,000 kilometers away, it can punch holes in every corner of the earth. Therefore, this equipment was originally used in the military and civilian fields involving important national interests, and was considered to be of great value. It was truly civilian and completely free. Nowadays, GPS products emerge in an endless stream, such as GPS mobile phones, car GPS, GPS modules... Therefore, the concept of latitude and longitude has been improved, and it is easier and easier for us to shuttle over the earth.
GPS user equipment includes GPS receivers and related equipment. The GPS receiver is mainly composed of GPS chips. For example, vehicle-mounted and ship-mounted GPS navigators, mobile devices with built-in GPS functions, and GPS surveying and mapping equipment are all GPS user equipment.
1.2 GPRS Concept: GPRS is a wireless packet switching technology based on gsm system that provides end-to-end and wide area wireless ip connections. Compared with the original gsm dialing method, gprs is a packet switching technology, which has the advantages of fast number login, high-speed free exchange and real-time online payment. Generally speaking, GPRS is a high-speed data processing technology that transfers funds to users in the form of "packets". GPRS is a 2.5-generation communication technology from GSM network to third-generation mobile communication system, and has obvious advantages in many aspects.
GSM-GPRS adds a series of functional entities on the basis of the original GSM network to complete the packet data function. The newly added functional entity constitutes the GSM-GPRS network, which bypasses the CSM data as an independent network entity to complete the GPRS service, while the original GSM network completes the voice function, thus minimizing the changes to the CSM network. The GPRS network and the GSM original network jointly complete the mobile management function of the mobile station through a series of interface protocols. GPRS adds some functional entities: serving GPRS support node SCSN, gateway GPRS support node GCSN, point-to-multipoint data service center and so on. , a series of software functions of the original functional entities have been enhanced. GPRS borrows and uses data communication technologies and products on a large scale, including frame relay, routers, access network servers, and firewalls.
After understanding the specific meaning, you will understand that GPS and GPRS are only similar in appearance. However, these two look-alike guys are really related, so we're going to bring out a concept - AGPS. AGPS is Assisted Global Positioning System, Assisted Global Positioning Satellite System. It combines GSM/GPRS with traditional satellite positioning, uses the base station to send auxiliary satellite information, and inserts the GPS chip to obtain the continuous time of the satellite signal. Covered rooms can also borrow plinths. Therefore, AGPS can provide a wider range, lower power consumption, and variable speed positioning services, and the ideal deviation range is within 10 meters.
In other words, GPS positioning can be optimized in more detail with the aid of the GPRS network. However, in order to realize the AGPS technology, in addition to adding a GPS receiving module inside the mobile phone, it is also necessary to transform the mobile phone antenna, and build a positioning server and a differential GPS reference station on the mobile network. If you want to improve the positioning timeliness of the GPS signal shielding area, more technologies need to be added.
2.GPRS vs GPS Summary:
2.1 GPS means "Global Positioning System", which is a positioning technology used to confirm the latitude and longitude position of objects. There will be no more advanced positioning technology than GPS for at least a decade.
2.2 GPRS means "General Packet Wireless Data Service", which is just a data transmission method. It uses data packet transmission to send mobile phone short messages without any positioning or anti-theft function.
2.3 GPRS can be said to be an integral part of GPS and a serial data transmission function for GPS technology.
