What exactly is GPRS?
The full name of GPRS is "General Packet Radio Service", which is a new type of packet data transmission service opened on the existing GSM network.
Compared with the original GSM dial-up circuit-switched data transmission mode, GPRS is a packet-switched technology, which has the advantages of "high speed" and "always on": (1) Mobile Shinkansen: circuit-switched data service, with a speed of 9.6Kbits per second, so the relationship between circuit-switched data service (CSD) and GPRS is just like the difference between 9.6k modem and 33.6KModem and 56KModem. (2) Always on, simple and convenient: In addition to the speed advantage, GPRS also has the feature of "always on", that is, users can keep in touch with the network at any time. For example, when a user accesses the Internet, a mobile phone sends and receives data on a wireless channel. Even if there is no data transmission, the mobile phone has always been connected to the network, unlike ordinary dial-up internet access, which requires redialing to access the internet. WAP and GPRS
WAP now uses a GSM data service called CSD (Circuit Switched Data). In the future, WAP will use GPRS as a new GSM network data service.
GPRS will not replace WAP, because the two categories are different. For example, GPRS and GSM data services are all roads, WAP is a car on the road, WAP is now driving in two lanes, and GPRS has increased the data transmission speed to eight lanes. It can be said that GPRS has enhanced WAP services.
So how will WAP develop? WAP is a technology with strong expansibility and great development potential, which is developed for the natural characteristics of mobile phones, such as small screen, low processing capacity, small storage space and strong mobility. It makes it possible to provide users with rich services at the existing narrowband wireless transmission rate, so that users can access the Internet now. It can be said that GSM originally provided a two-lane road, and now the version of WAP technology provides us with motorcycles suitable for driving in two lanes; And GPRS provides us with a broader way. By then, WAP technology will develop from motorcycle to sports car, and it will fly along GPRS Avenue with WeB bus.
At the same time, WAP service can be continuously enhanced with the development of network technology (from CSD to GPRS, from GPRS to the third generation), but the WAP service that users use now will not change, only from now on, they can only see words and monochrome pictures to browse color pictures and articles, from browsing static pages to multimedia services, such as downloading CD records to play on their mobile phones and chatting with ICQ while watching each other's pictures. WAP mobile phone based on GPRS will become an arbitrary personal communication tool and service.
What is the relationship between GPRS and the third generation?
GPRS is a 2.5-generation technology, which can provide high-quality wireless data services for current mobile users. The services such as WAP, mobile games and mobile office that users use on GPRS can continue to be used in the future third-generation mobile communication system.
The highest speed of GPRS can reach 1 15.2K (bits per second), which is twice the speed of 56KModem. The specific speed depends on the capabilities of the terminal. At present, the access speed of users can be divided into 20K, 40K, 60K,115.2k. Whether users can surf the Internet while talking on the phone depends on the terminal's ability. GPRS terminals are divided into three levels: Class A terminals can transmit data and make phone calls at the same time; Class B and Class C terminals cannot transmit data when making a phone call, so they need to switch between data transmission and voice call, in which Class B terminals can switch automatically and Class C terminals need to switch manually. The most common mobile phone on the market is Class B mobile phone.
GPRS provides a highway for wireless data transmission. As long as you can access the GPRS network, you can use wireless data services. Therefore, GPRS terminals will not only be limited to existing mobile phones, but also can be online game machines, beautifully made wireless e-books and wireless handheld computers.
The services that GPRS can realize include: Internet services (web browsing, e-mail, remote login, etc. ); RPN (Virtual Private Network) service/mobile office; WAP service; E-commerce and e-banking; Vehicle positioning and road information; Information on demand, stock information, weather forecast, advertising, etc.