Know About Wireless Application Communication Protocol

Wireless Application Protocol is a global network communication protocol. It has a universal standard for the mobile Internet. Its goal is to introduce the Internet's rich information and advanced services into wireless terminals such as mobile phones.

The wireless application protocol defines a general-purpose platform that converts information on Internet-based HTML (an application under the standard common markup language SGML) into information described with WML (Wireless Markup Language) and is displayed on a mobile phone's display screen. WAP only requires the support of mobile phones and WAP proxy servers, and does not require any changes to the existing mobile communication network protocols. Therefore, WAP can be widely applied to various networks such as GSM, CDMA, TDMA, and 3G.

Development History

With the development of mobile communication technologies and Internet technologies, the WAP (Wireless Application Protocol) technology has become the main global standard for mobile terminals to access wireless information services, and it is also the technical foundation for realizing mobile data and value-added services.

The Wireless Application Protocol (WAP) was announced in early 1998. It is a network communication protocol and a global open standard. Its emergence has made the mobile Internet a universal standard, marking the maturity of mobile Internet standards.

WAP has become the global implementation standard for accessing wireless information services through mobile phones or other wireless terminals. Its development and application are indispensable. It can be said that the only limitation is your imagination. WAP has not only changed many existing applications by leaps and bounds, but also produced more new value-added services.

Principle

Users can access information via WAP through wireless handheld devices such as handheld computers, mobile phones, pagers, two-way broadcasts, and smart phones. WAP supports the vast majority of wireless networks, including GSM, CDMA, CDPD, PDC, PHS, TDMA, FLEX, ReFLEX, iDen, TETEA, DECT, DataTAC, and Mobitex. All operating systems support WAP, specifically PalmOS, EPOC, Windows CE, FLEXOS, OS/9 and JavaOS. Some handheld devices, such as handheld computers, use a WAP to access the Internet after installing a micro browser. The micro browser file is very small, which can better solve the problem of small memory of the handheld device and insufficient bandwidth of the wireless network. Although WAP supports HTML (an application under the standard universal markup language) and XML (a subset of the standard universal markup language), WML is a language that is specifically designed for small screen and keyboardless handheld devices. WAP also supports WMLScript. This scripting language is similar to JavaScript, but it requires less memory and CPU because it is basically free of the useless features of other scripting languages.

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

Proxy features:

1. To achieve the WAP protocol stack and Internet protocol stack conversion

2. Content Encoders and Decoders

3. Cache agents, etc.

WAP Protocol

WAP (Wireless Communication Protocol) is a global open standard for communication between digital mobile phones, the Internet or other personal digital assistants (PDAs), computer applications, and even information appliances in the future. The birth of this standard was the result of the efforts of the WAP Forum members. The WAP Forum was formed in June 1997 by Nokia, Ericsson, Motorola and Unwi red Planet.

Wap system architecture

Through WAP technology, a large amount of Internet information and various services can be introduced into wireless terminals such as mobile phones and PALMs. No matter where and when you need information, you can open your WAP phone and enjoy endless online information or online resources.

WAP can run on various wireless networks, such as GSM, GPRS, CDMA and so on. WML is the acronym for Wireless Markup Language. WAP phones that support WAP technology can browse Internet content described by WML.

WML is a markup language based on XML (a subset of the standard universal markup language) and is used to specify how narrowband devices, such as mobile phones, pagers, etc., display content and user interface languages. Because of the narrow frequency, WML is partially limited, such as smaller displays, limited user input devices, narrowband network connections, limited memory and resources.

WML supports text and image display. In the content organization, one page is a Card, and a group of Cards constitute a Deck. When the user submits a browsing request to the server, WML sends the entire Deck to the client's browser, and the user can browse the contents of all Cards in the Deck without downloading each Card separately from the network.

With the WAP technology, a large amount of Internet information and various services can be introduced into wireless terminals such as mobile phones and PALMs. Whenever, whenever and wherever information is needed, WAP phones can be opened, users can enjoy endless online information or online resources. Such as: comprehensive news, weather forecast, stock market dynamics, business reports, current exchange rates, etc. E-commerce and online banking will also be implemented one by one. Through WAP mobile phone users can also obtain sports competition results, entertainment anecdotes, etc. anytime, anywhere, add fun to life, you can also use the online booking function to make arrangements for an orderly life.

Species

1、Wireless Application Environment(WAE)

2、Wireless Session Layer(WSL)

3、Wireless Datagram Protocol(WDP)

WAP2.0

New features:

Using the latest Internet standards and protocols

Provides manageable backward compatibility with existing WAP content, applications, and services

Adopt XHTML MP to support full backward compatibility with WML 1.0

New technology:

Wap2.0 protocol stack

TLS Protocol and Wireless Identity Module Technology (WIM, Wireless Identity Module)

TCP/IP transfer protocol mobile

Mobile friendly technology: including a short version of XHTML; Cascading Style Sheets (CSS) mobile templates; user preferences and equipment capabilities, etc.

Enhanced business functions such as Wireless Telephony Applications (WTA), Push, and User Agent Description (UAPROF)

Protocol stack:

Compared with WAP1.x, WAP2.0 cancels WSP and WDP and replaces it with HTTP and TCP/IP. The improvement of this wireless data transmission technology brings about an effective increase in transmission rate and transmission reliability.

WAP Function

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

Public Service: Provides users with real-time weather, news, sports, entertainment, transportation and stock information.

Personal Information Services: Including search pages to find information, search addresses, e-mails and faxes, of which e-mail may be one of the most attractive applications.

Commercial applications: In addition to mobile office applications, I am afraid that mobile commerce is the most important and most potential application, and stock trading, banking, online shopping, airline tickets and hotel reservations, product orders, etc., may be the first to be launched in mobile commerce application.