GPRS- General Packet Radio Service is a wireless packet switching technology based on GSM system, which provides end-to-end and wide-area wireless IP connection. Generally speaking, GPRS is a high-speed data processing technology, and the method is to transmit data to users in the form of "packets". Although GPRS is a transitional technology from the existing GSM network to the third generation mobile communication, it has obvious advantages in many aspects. At present, Hong Kong, as the first area to conduct GPRS field test, has achieved good results.
Because of the use of "grouping" technology, users can avoid the pain of disconnection when surfing the internet (the situation is probably similar to using the download software NetAnts). In addition, the method of accessing the Internet using GPRS is different from WAP. Using WAP to surf the Internet is like surfing the Internet at home. After surfing the Internet, you can't use the telephone line at the same time, but GPRS is superior. You can download data and talk at the same time. Technically speaking, GSM will continue to be used for voice transmission (that is, call), while GPRS can be used for data transmission. In this way, the application of mobile phones will be promoted to a higher level. Moreover, the development of GPRS technology is also very "economical", because it can only be developed according to the existing GSM network. GPRS is widely used, including sending and receiving e-mails through mobile phones and surfing the Internet.
At present, the slogan of mobile Internet access is "always online" and "IP in hand". After using GPRS, data can be sent and received in groups, which means that users are always online and charged according to the flow, which quickly reduces the service cost. For the WAP tariff policy of China Mobile/China Unicom, which is still difficult to produce at present, if the CSD (circuit switched data, commonly known as dial-up data) bearer is changed to GPRS, it means that dozens of people will bear the original cost.
The biggest advantage of GPRS is that the data transmission speed is not as fast as WAP. At present, the transmission speed of GSM mobile communication network is 9.6kbytes per second, and the transmission speed of GPRS mobile phone has reached 9.6Kbps when it was launched at the beginning of this year, and now it has reached 1 15Kbps (twice the ideal speed of the commonly used 56Kmodem). So please cherish Nokia7 1 10 and MotorolaL2000. I believe that GPRS mobile phones will give way as soon as they are launched.
The application of GPRS will cooperate with the development of Bluetooth in the future. By then, a digital camera with Bluetooth can immediately send photos to distant places through mobile phones, but it only takes a quarter of an hour, which is cool enough. This day is not far from us. (quietly)
2. What are the technical advantages of 2.GPRS compared with WAP?
Answer: The existing WAP bearer is circuit-switched (CSD) mode, while GPRS uses packet-switched mode to transmit data. Data and voice in circuit-switched mode cannot be carried out at the same time, and charging mode is also based on the length of time. Because GPRS is packet-switched, the utilization rate of network resources is much higher than that of circuit-switched. GPRS can transmit voice and data at the same time, and can be charged according to the generated traffic.
In fact, WAP itself is not comparable to GPRS, and the existing WAP content can be browsed and applied on GPRS, but GPRS makes the existing CSD WAP faster, more convenient and more reasonable, and the service content of WAP will be greatly promoted and improved because of the technological progress of the network.
3. Will 3.GPRS replace WAP?
Answer: WAP now uses the GSM data service of CSD (Circuit Switched Data). In the future, WAP can use GPRS, a new GSM network, as the bearer.
GPRS will not replace WAP, they belong to different categories. GPRS and GSM data service based on CSD are both roads, while 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 enhances WAP service, and the content on existing WAP can also be browsed and applied through GPRS.
4. What are the technical advantages of 4.GPRS compared with GSM?
Answer: GPRS is a packet-switched data bearing and transmission mode developed on the basis of GSM. Compared with the original GSM, GPRS has obvious advantages in data service bearing and support: it makes more effective use of wireless network channel resources, especially suitable for sudden and frequent small-flow data transmission; The supported data transmission rate is higher, and the theoretical peak reaches115 kbps; The charging method is more flexible and can support charging according to data flow; GPRS can support voice calls and so on while transmitting data.
5. Compared with the existing GSM, what different application services can GPRS bring to users?
A: GPRS mobile data service can provide users with rich application services, such as mobile commerce, mobile information service, mobile internet service and virtual private network industry? Surgery? . Organization? Services, location-based services, multimedia services and personal services. Of course, due to the technical characteristics of GPRS itself, there are also some application services that are particularly suitable for GPRS network, such as online chat, mobile stock trading, remote monitoring, remote counting and other data services with low traffic and high transmission frequency.
6. What is the relationship between 6.GPRS and WAP and HTTP?
Answer: For example, two users use ordinary fixed telephones and mobile phones to make calls, in which GPRS is equivalent to telephone lines and telecommunication networks for voice transmission, WAP and HTTP are equivalent to Cantonese or Mandarin spoken by users, and users say, "Have you eaten?" It is the specific content transmitted on WAP and HTTP. So GPRS and WAP are different concepts.
7. What is the relationship between 7.GPRS and the second and third generation?
A: GPRS is developed on the basis of the second generation wireless communication system GSM, and network system equipment supporting packet switching is added in the transmission of data streams. The third generation wireless communication system will make further technical progress and development on the basis of GPRS, and fully support the high-speed and broadband multimedia data transmission of the network. In other words, GPRS is a network technology between the second generation and the third generation, generally called 2.5 generation.
8. How long is the service life of 8.GPRS? Is it just a transitional product?
A: Transitional products can be regarded as phased mainstream products if they are transitioned for several years or even longer. At present, the world is cautious about the development of 3G networks, and it is believed that operators in China will develop 3G networks steadily according to the number and demand of data users. In the vacuum period of several years, GPRS is undoubtedly the first choice for the development of mobile data services.
GPRS is a packet-switched data bearing and transmission service developed on the basis of GSM system, and it is a 2.5-generation network product, but it does not mean that GPRS is only a transitional product. On the contrary, GPRS is a very important and indispensable step and milestone in the evolution from the second generation network to the third generation network. Compared with GSM, GPRS has achieved a qualitative leap from circuit switching to packet switching in data transmission, which has greatly promoted the development of mobile Internet and data services. At this stage, the road of the third generation is not very clear, and the technical development and market demand are not very mature. In the next 4-5 years, GPRS will become the most important carrier of mobile data services.
In addition, all the network products and services of new technologies come from backward compatibility, that is to say, even if the third generation network already exists, GPRS will coexist with the third generation for a long time due to the network cost and gradual market.
9. What are the characteristics of 9.GPRS compared with CDMA?
A: Strictly speaking, GPRS is a mobile data network based on 2.5 generation technology developed on the basis of GSM network, which realizes data transmission through packet switching. The main advantages of GPRS are "always on" and "charging by flow". In other words, GPRS can surf the Internet at any time without dialing, and keep in touch with the network at any time, and the charge is more reasonable, and it is completely charged according to the actual traffic. Moreover, GPRS is developed on the basis of the original GSM in the wireless end of the network, so the network coverage of GPRS should be said to be relatively mature; In addition, the original GSM users are upgraded to GPRS users without changing their mobile phone numbers, and GPRS services are directly opened on GSM mobile phone numbers.
There are several kinds of CDMA, such as IS-95A, IS-95B and CDMA2000. IS-95B is a circuit-switched type that people usually have now. IS_95A(CDMA2000 1x) is the second generation technology of CDMA, and CDMA2000 is the third generation network technology. At present, most domestic operators and CDMA to be built are IS-95B, which means it is only the second generation network of CDMA.
10. What is the relationship between the third generation mobile communication and GPRS?
Answer: At present, the data transmission mode of GSM network is two lanes, GPRS is eight lanes or Shinkansen railway, and the third generation mobile communication is Boeing 777.
1.GPRS function:
Real-time online, metering, quick login, high-speed transmission and free switching.
A) real-time online:
You don't need to dial, you can directly connect to the GPRS network as soon as you turn it on. Just press the GPRS function key and surf the Internet at any time. Unlike ordinary dial-up internet access, you have to redial to access the internet after disconnection.
B) Charge by quantity:
The charging method is based on the amount of traffic and has nothing to do with time. If you stare blankly at an access content, it is free, and you only need to pay according to the actual amount of data transmitted. For users who use GPR S mobile phones, the call fee and GPRS service fee are separated. All places covered by GPRS in China can realize GPRS automatic roaming, and users are not charged roaming fees.
For example, you can make a vivid animation to show the relationship between charging by flow and charging by time.
When you browse the web, you open a window to read, resulting in 5kB of traffic, so you will only be charged 5kB, and there is no charge for reading time;
You chat online, send or receive 6 messages in an hour, and the traffic is 1kB, so you only charge 1kB instead of charging by the hour.
You download an mp3 with a traffic of 4M, and then listen to it online, so the traffic fee is 4M, and there is no charge when listening.
C) quick login:
The GPRS mobile phone can automatically connect to the GPRS network as soon as it is turned on, and the connection time is generally 3-5 seconds; When you need to use GPRS data service, just press the function key, 1-3 seconds later to access the content you need.
D) high-speed transmission:
At present, the access speed of GPRS users is about 30 kbps-40 kbps, which is about 3-4 times that of ordinary mobile phones.
At present, the theoretical maximum rate supported by GPRS network built by China Mobile is171.2kbps. At this rate, you can watch pictures, animations, videos on demand, downloads and so on. Get on the internet, and its network speed is faster than the dial-up internet speed of home computers.
E) free switching:
Surgery? . Teacher? Using GPRS to surf the Internet, you can also talk to your friends normally.
GPRS mobile phones are divided into ab and C, and the most common mobile phone on the market is Class B:
Class A mobile phones can still surf the Internet and send and receive emails while making voice calls.
Class B mobile phones can automatically switch between surfing the Internet and voice calls, temporarily stop surfing the Internet when making a call, and continue to switch surfing the Internet after the call.
Class C mobile phones need to manually switch between the call state and the internet state.
2. Conditions for using GPRS network:
A) own a GPRS mobile phone.
B) make connection (APN) settings:
I. Set WAP service as CMWAP, and other Internet (www) services use CMNET.
Two. The user name and password are set to be empty, and other settings are the same as the original WAP settings.
Three. At present, Ericsson mobile phones can download GPRS and WAP settings through SMS in some provinces and cities.
C) Open GPRS network service in local mobile business hall or local mobile business website.
3. Advantages of 3.GPRS mobile phone:
A) If you have a GPRS mobile phone, you can use all the original WAP website information and services;
B) You can browse the Internet through GPRS mobile phone+notebook or PDA;
C) You can visit WAP websites with colorful pages;
D) In addition, you can directly send and receive POP3 emails through GPRS mobile phones for online chat, online conference, mobile stock trading, mobile commerce, mobile entertainment and online shopping.
4.GPRS application services:
A) Mobile commerce: including mobile banking, mobile financial management and mobile transactions (stocks and lottery tickets).
B) Mobile information services: information on demand, weather, travel, services, yellow pages, news and advertisements, etc.
C) Mobile Internet services: web browsing, e-mail, etc.
D) Virtual private network services: mobile office, mobile medical services, etc.
E) Location-based services: location inquiry, navigation of hotels and similar service industries, etc.
F) Multimedia services: videophone, multimedia information transmission, online games, music, video on demand, etc.
G) Personal services: PIM and other services tailored for individuals, and so on.