Break-even point-refers to the total amount of business (recorded as BEP) when the enterprise can achieve the state of capital preservation.
GPRS is called General Packet Radio Service in English and General Packet Radio Service in Chinese. It is a set of wireless transmission mode developed by using the concept of "packet switching". The so-called packet exchange is to package data into many independent packets and then send these packets one by one, which is a bit like sending a packet. The advantage of packet switching is that it only takes up bandwidth when there is data to send, and it can be priced according to the amount of data transmitted, which is a more reasonable charging method for users, because the time and bandwidth of data transmission like the Internet are mostly staggered. In addition, in the standard of GSM phase 2, GPRS can provide four different coding modes, which also provide different error protection capabilities. Using four different coding methods, each time slot can provide the transmission rates of CS- 1(9.05K), CS-2( 13.4K), CS-3( 15.6K) and CS-4(2 1.4K). ..
Main features: data packet sending and receiving, charging by flow; 56~ 1 15Kbps transmission speed.
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 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).
GPRS uses packet switching to transmit data, which greatly improves the utilization rate of network resources compared with circuit switching, and GPRS can transmit voice and data at the same time, and the billing can be counted according to the generated traffic. However, the existing WAP bearer is circuit-switched (CSD) mode, data and voice cannot be carried out at the same time, and the charging method is also long-term charging.
In fact, WAP itself is not comparable to GPRS in nature. The contents of existing WAP 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.
In the long run, WAP now uses CSD (Circuit Switched Data) GSM data service, and WAP can also switch to GPRS, a new GSM network, as the bearer mode in the future.
So GPRS will not replace WAP. For example, GPRS and CSD-type 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 enhances WAP service, and the content on existing WAP can also be browsed and applied through GPRS.
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.