WAP connects three speed-development internet technologies today, which is wireless data transmit technology、telephone technology and Internet technology.
The market of wireless data and Internet business both increase quickly, and new user number is increasing continuously. The surprised increasing of Internet also irritates extremely the new generation of message business and development of great demanded message business.
At present, most technologies which are exploited to Internet application aim at desktop computer and large-scale computer, these technologies need above average bandwidth and robust data transmission network. Comparing to desktop computer, the hand wireless equipment, which owe large scale of market, get much restricted for its computation environment. As the restricting of power and figure, the hand wireless equipment which own large scale of market has some characters as following:
l Performance of CUP is weak
l Memory (including ROM and RAM) space is small
l Power waste is limited
l Screen is small
l Different from inputing equipment of computer (such as mobile telephone’s keyboard)
Similarly, comparing to wireness network, the communication of wireless data network is had
much more restricted, for the restricting of power、frequency band which could be used and mobile performance, the wireless data network have some problems as following:
l Much narrower of bandwidth
l Time delay is big
l Connecting performance robust is bad
l Difficult prediction the useness
At present, the complex performance of mobile network is higher and higer. To provide more value added business, the total expense is also increasing continuously. To satisfy the mobile operators needs, it must do:
l Compatibility is good: The terminals coming from different manufacturers may receive service at the same mobile network.
l Easy updating: The mobile operators may update the business according to user’s needs.
l Higher efficiency: It could provide a robust and predicted platform for developing business.
l Good safe performance: When the user’s data is ensured perfectly, the mobile network which could spread the business to unsafe area, and equipment and business would not be disturbed by safe problem.
At present, lots of mobile network could provide advanced business to users. To promote the development of mobile network business faster and debase the number of loss user, the operators who have mobile network are always working hard to provide useful as well as interesting advanced business to their users.
While the WAP technology is defined and extended by WAP Forum in this background. Basically the main stream in international of telecom manufacturers and operators are all the member of WAP FORUM.
Compare to WWW program model, WAP program model does a little improved, which may bring much benefit to programmers who commit themselves to application program, the benefit includes: the program model is familiarized, system structure is confirmed much efficiently, at the same time it can use tools which already owned (such as Web server, extending sign language XML, etc) to make a further exploiture. For adapting the special wireless application environment, in the base of WWW program model, WAP program model does some optimizing and extending. Wherever it be, WAP technology does its best to use or adopt the technology standards which have already been instituted, at the same time these standards may be as the beginning of exploiture the WAP technology. And the WAP program model support to operate Push and telephone.
WAP technology has some characters as following:
l Independence load
n Application developer may be allowed to exploit once, then could run WAP application on all of the loading network; it could load WAP application wherever on the SMS/GPRS/CSD/CDMA/USSD/TDMA etc; WAP application is independent of the load network.
n It could ensure operator’s investment on the telecom network.;
n Equipment manufacturers could use the same program code at different product lines to debase the cost and complexity.
l Independence equipment
n Application developer may be allowed to exploit once, then could use it at all kind of terminals, whatever it is mobile telephone、PDA, etc.
n Whatever he use any kind of terminal, it can ensure that user’s sense of business identical.
l Input optimized microbrowser on the terminal
n It only needs minimum hardware resource such as RAM/ROM/display resource/CUP resource/keyboard resource, etc.
n Providing to operators an unite service interface UI;
n Providing compatibility with Internet content
More abstracts about the Sample description of WAP