What is the significance and application of wap?

Wap is a wireless application protocol and a global network communication protocol. So how much do you know about wap? The following is what I have compiled about wap, I hope you like it!

Introduction to WAP

Wap makes the mobile Internet a universal standard, and its goal is to introduce the rich information and advanced services of the Internet into wireless terminals such as mobile phones.

The wireless application protocol defines a general platform, which converts the information of HTML (an application under the standard generalized markup language SGML) on the Internet into the information described by WML (Wireless Markup Language) and displays it on the display screen of the mobile phone. WAP only needs the support of mobile phones and WAP proxy servers, and does not need to make any changes to the existing mobile communication network protocols, so it can be widely used in GSM, CDMA, TDMA, 3G and other networks.

The use principle of WAP

Users can get information through WAP with the help of wireless handheld devices, such as PDA, mobile phone, pager, two-way broadcast, smart phone, etc. WAP supports most wireless networks, including GSM, CDMA, CDPD, PDC, PHS, TDMA, FLEX, Flex, iDen, TETEA, DECT, DataTAC and Mobitex. All operating systems support WAP, among which PalmOS, EPOC, Windows CE, FLEXOS, OS/9 and JavaOS are specially designed for handheld devices. Some handheld devices, such as PDA, connect to the Internet through WAP after installing a micro browser. Micro-browser files are very small, which can better solve the limitations of small memory of handheld devices and insufficient bandwidth of wireless networks. Although WAP can support HTML (application under standard generalized markup language) and XML (subset of standard generalized markup language), WML is a language specially used for small screen and keyboard-less handheld devices. WAP also supports WMLScript. This scripting language is similar to JavaScript, but it needs less memory and CPU because it basically has no useless functions contained in other scripting languages.

Using client/server mode, a micro browser similar to the browser running on PC (such as IE, NETSCAPE) is embedded in the mobile terminal, and more transactions and intelligent processing are handed over to WAP gateway. Services and applications temporarily reside in the server, rather than permanently stored in the mobile terminal.

Functions of the agent:

1 to realize the conversion between WAP protocol stack and Internet protocol stack.

2. Content encoder and data encoder.

3. Cache agent, etc.

WAP protocol

WAP (Wireless Communication Protocol) is a global open standard for communication among digital mobile phones, Internet or other personal digital assistants (PDA), computer applications and even future information devices. The birth of this standard is the result of the efforts of WAP forum members, which was established by Nokia, Ericsson, Motorola and Unwi redPlanet in June 1997.

Through WAP technology, a large amount of information and various services from the Internet can be introduced into wireless terminals such as mobile phones and handheld computers. Whenever and wherever you need information, you can turn on your WAP phone and enjoy endless online information or online resources.

WAP can run on various wireless networks, such as GSM, GPRS, CDMA, etc. WML is short for Wireless Markup Language. Mobile phones supporting WAP technology can browse the Internet content described by WML.

WML is an XML-based markup language (a subset of standard generalized markup language), which is used to standardize the way in which narrowband devices (such as mobile phones and pagers) display content and user interfaces. Due to the narrow frequency, WML is partially limited, such as small display, limited user input devices, narrow frequency network connection, limited memory and resources.

WML supports text and picture display. In content organization, a page is a card, and a group of cards constitutes a deck of cards. When the user requests browsing from the server, WML will send the whole deck of cards to the browser of the client, so that the user can browse the contents of all the cards in the deck without downloading each card separately from the network.

Through WAP technology, a large amount of information and various services from the Internet can be introduced into wireless terminals such as mobile phones and handheld computers. Whenever and wherever information is needed, users can enjoy endless online information or online resources as long as they turn on WAP phones. Such as: comprehensive news, weather forecast, stock market dynamics, business reports, current exchange rate, etc. E-commerce and online banking will be realized one by one. Through WAP, mobile phone users can also get sports results, entertainment anecdotes and so on. Add interest to their lives anytime, anywhere, and they can also use the online booking function to arrange their lives in an orderly way.

Application of WAP

WAP function

At present, the application scope of WAP mainly involves three aspects (public service, personal information service and commercial application).

Public service: it can provide users with the latest weather, news, sports, entertainment, transportation and stock information in real time.

Personal information service: including browsing the web to find information, searching for addresses and numbers, sending and receiving emails and faxes, among which email may be one of the most attractive applications.

Business applications: In addition to mobile office applications, I am afraid that mobile commerce is the most important and potential application, as well as stock trading, banking, online shopping, air tickets and hotel reservations, product ordering and so on. It may be the first application of mobile commerce.

WAP can bring great convenience to life. People who are inconvenient to use computers can also download mobile phone pictures, mobile phone software and mobile phone themes online through WAP, interact wirelessly with netizens all over the world, share their newly taken photos with friends through BBS, and even buy what they need through WAP.

Wireless application protocol

The page language of WAP website is WML, and the later upgraded version of WAP 2.0 (the so-called 3G version) is XHTML. Users can get information through WAP with the help of mobile phones that support GPRS Internet access.

The page language of the early version of WAP is WML, which is a pure page markup language. It is an XML-based markup language inherited from HTML, and its coding structure is stricter than HTML.

Only text and picture information can be displayed, and the interface is relatively simple, consisting of text, links and pictures, with single function. In order to facilitate the standards formulated by W3C, WAP was changed from 1.0 to 2.0 after 2005. WAP 2.0 adopts XHTML and CSS as the underlying support of WML 2.0, which is more powerful than the earlier WAP 1.0 in terms of function, performance, security and transmission. WAP 2.0 supports CSS, background music and so on. Due to the special physical environment, WML language does not contain fancy functions contained in other scripting languages, so the requirements for memory and CPU are relatively low. WAP websites can be browsed directly through the built-in or installed mobile phone browser. Most mobile phones in the market support GPRS internet access function, and can browse all WAP 1.0 websites, while quite a few low-end mobile phones do not support WAP 2.0 websites.

WAP is generally a dynamic page. The main programming language is ASP+ACCESS, and there are also transitional versions of JSP, PHP and ASP. Net. Except ASP, which mainly uses ACCESS database, the latter is mainly written in MySQL database.

The promotion of WAP website is relatively simple, mainly relying on word of mouth, mass messaging, WAP forum, circle of friends and WAP website. There is basically no SEO in WAP, and mainstream web search engines have the function of transcoding web pages, which can transcode web sites into WAP content for mobile phones to browse. WAP also has many mobile search engines, such as Easy Search, Easy Search, Wukong and so on.