GPRS features

1. Application on the characteristics of
At present, the Internet using a mobile phone is also a bit less than satisfactory. As a result, a comprehensive solution GPRS so it came into being, this new technology can make you at any time, any place can be quickly and easily connect at the same time very reasonable cost. In short: speed up, and rich in content, applications increased, while the costs are more reasonable.
(1) high-speed data transmission
10 times the speed of GSM, but also fulfill the needs of your ideals, but also to stability in the transmission of high-capacity, high-quality audio and video files, is generally not great progress.
(2) always-on
Since the establishment of a new connection without almost any time (that is, no need for each visit to the establishment of the data call connection), so any time you can keep in touch and network, for example, in the absence of support for GPRS, is when you surf the net, and At this point there is just phone access, most of the time you have to get disconnected after the call, the call after the re-dial-up. For most people, this really is very irritating. And with GPRS, you can easily resolve this conflict.
(3) only by the flow of data billing
That is, based on the amount of data you transfer (such as: downloading information) to billing, rather than time online billing is to say, not as long as data transmission, even if you have been "online", and need not pay. To be a "call" for instance, the use of GSM WAP mobile Internet access, like telephone billing began to get through; use GPRS WAP Internet access will be much more reasonable, just as telephone access charges is not only dialogue When calculating the cost. In short, it truly reflects the use of low pay.
2. Technical characteristics
Data sent to realize and accept the subsector, according to the billing flow; 56 ~ 115Kbps transmission speed.
Due to the use of a "group" of technology, Internet users can be disconnected from the suffering of the (situation about the use of just a software download NetAnts almost). In addition, the use of GPRS and WAP access to the Internet and in different ways, such as WAP access on the Internet at home, the first "dial-up connection" and then the Internet can not use the telephone line, but on more favorable GPRS, download information and can call At the same time. Technically, the transmission of voice (that call) to continue to use GSM, and data can be transmitted using GPRS, this is the case, put mobile phone applications to a higher level. GPRS technology development and also the "economy", because only the existing GSM network to develop. GPRS uses the wide range of issues, including the adoption of mobile phones to send and receive e-mail, browse the Internet, and so on.
Internet phones are now the slogan is "always online", "IP in hand", using GPRS, the realization of the data packet to send and receive, at the same time this means that the user is always online and by billing traffic, to quickly lower the costs of the services. The continued state of dystocia in China Mobile / Unicom WAP tariff policy, if the CSD (circuit-switched data, that is usually said that the dial-up data, WAP European and Asian business methods used by the bearer) carrying changed to achieve the GPRS, it means that Dozens of people from a common commitment to one of the original cost.
GPRS greatest advantage is its data transfer speed is not WAP can be compared. The current GSM mobile communications network for the transmission speed of 9.6kbps, GPRS mobile phones launched in the beginning of this year have reached a speed of 56Kbps, up to now is to achieve a 115Kbps (this is the speed of common ideals 56Kmodem twice the rate).
GPRS is packet-switched data transmission manner, is due to packet switching, so the utilization of network resources than circuit-switched has been greatly improved, but at the same time GPRS voice and data transmission and billing Can be produced in accordance with the traffic statistics. The existing WAP is the bearer of the circuit-switched (CSD) way, way circuit-switched voice and data can not be carried out at the same time, in accordance with the charging system is also a long time to charge.
In fact its own WAP and GPRS are not comparable in nature, the existing WAP content in the above GPRS can browse and application of GPRS is only available means of CSD's WAP faster, more convenient and more reasonable charges, WAP services on the network also due to technological advances and greater promotion and improvement.
In the long run, WAP are using CSD (circuit-switched data), GSM data services, after the WAP can also use GPRS to the new GSM network as a way of carrying.
Therefore, GPRS will not replace the WAP, to cite an example of the image: GPRS and CSD is the way the GSM data services are the road, WAP is a road car, WAP is now running in lane two, GPRS enhanced data transfer speed , Is the 8-lane, it can be said GPRS enhanced WAP services, available on WAP content can browse through GPRS and applications.
GPRS application, but also later with Bluetooth (Bluetooth). At that time, plus a digital camera bluetooth, can be immediately adopted by the phone to send photos to distant places, but a quarter of an hour's time, let cool, this time we will be away from far away.
3.GPRS compared with the GSM show the characteristics of
Compared to the GSM terms of the speed of 9.6kbps visit, GPRS speeds have 171.2kbps visit; in the establishment of connection time, GSM needed 10-30 seconds, and GPRS only a very short period of time can be related to the visit request; for Terms of cost, GSM is connected by the time of billing, and the only GPRS data traffic according to billing; GPRS network resources utilization and relatively much higher than the GSM.
4.GPRS correspond to the characteristics of the scope of services
1. M-Commerce
2. Mobile Information Service
3. Mobile Internet
4. Multimedia services
The technical 5.GPRS advantage
(1) relatively low-cost connectivity
High resource utilization in the GSM network, GPRS introduction of the first packet-switched transmission mode, making use of the original model of the circuit-switched GSM data transmission means there has been a fundamental change in wireless scarce resources under the circumstances it is particularly important. According to circuit-switched mode, to connect the entire period, regardless of whether users will send data occupies its own wireless channel. In conversation, many applications are often a lot of free time, as Internet browsing, send and receive E-mail and so on. The packet switching mode, the user only send or receive data only during the occupation of resources, which means that multiple users can efficiently share the same wireless channel, resulting in improved resource utilization. GPRS user billing to the amount of data communications as the main basis for the concept of "how much, how much to pay" principle. In fact, GPRS users to connect up to a few hours time, but pay relatively low-cost connections.
(2) a high transfer rate
GPRS will provide up to 115kbit / s transfer rate (the highest value for 171.2kbit / s, not including FEC). This means that in a few years, portable computers, GPRS, and ISDN users the same user to quickly browse the Internet, as well as some of the transmission rate-sensitive mobile multimedia applications possible.
(3) access packet-switched access time is short time for less than 1GPRS is a new GSM data services, which can give mobile users with wireless data packet access Services Unit. GPRS is a remote and mobile users in the data network (such as support for the TCP / IP, X.25 network, and so on) to provide a connection between so as to provide users with high-speed mobile wireless IP and wireless business X.25.
Using GPRS packet switching technology, which allows multiple users to share some of the fixed channel resources. If the air interface on the TDMA frame of 8 slots are used to transmit data, the data rate of up to 164kb/8.GSM air interface channel resources can be occupied by voice, GPRS data services can be occupied. Of course, in the channel adequate conditions, the number of channels can be defined as GPRS dedicated channel. To achieve the GPRS network, the need for the traditional GSM network, the introduction of a new network interface and communication protocols. At present, the introduction of GPRS network GSN (GPRS Surporting Node) node. Taiwan Mobile will be GPRS mobile station or GPRS / GSM dual-mode mobile station.