全部博文（83）
分类： 系统运维
2007-11-16 10:19:29
WAP协议被设计用来在无线客户端（比如移动电话）上展示因特网内容。
无线产品提出了WAP的理念。此标准的要点是在无线设备上展示因特网内容。
WAP是一种用于在无线终端（比如数字移动电话）进行信息服务的主要的标准。
WAP标准基于因特网标准（HTML、XML以及TCP/IP）。它包括WML语言规范、WMLScript规范以及无线电话应用接口规范（WTAI）。
WAP由WAP论坛（WAP forum ）发布，被爱立信、摩托罗拉、诺基亚以及Unwired Planet创建于1997年。论坛的成员目前占据着超过90%的全球手机市场，同时又是领先的基础设施提供商、软件提供商及其他机构。您可以在我们的 WAP论坛页面找到有关WAP论坛的更多信息。
为了适合小型无线终端，WAP使用了一种微浏览器。
微浏览器是一种小型软件，可向硬件、内存和CPU发布基本的指令。它可以显示用一种由被称为WML的受限标记语言编写的信息。
微浏览器也可翻译一种被称为WMLScript的JavaScript简化版。
WML指无线标记语言。它是一种从HTML继承而来的标记语言，但是WML基于XML，因此它较HTML更严格。
WML被用来创建可显示在WAP浏览器中的页面。用WML编写的页面被称为DECKS。DECKS是作为一套CARDS被构造的。
WML使用WMLScript在客户端运行简单的代码。WMLScript是一种轻量级的JavaScript语言。不过，WML脚本并不嵌在WML页面中。WML页面仅仅含有对脚本URL的引用。WML脚本在WAP浏览器运行之前，需要先在服务器上被编译为字节编码。
To enable easy, fast delivery of relevant information and services to mobile users.
Handheld digital wireless devices such as mobile phones, pagers, two-way radios, smartphones, and communicators -- from low-end to high-end.
WAP is designed to work with most wireless networks such as CDPD, CDMA, GSM, PDC, PHS, TDMA, FLEX, ReFLEX, iDEN, TETRA, DECT, DataTAC, Mobitex.
WAP is a communications protocol and an application environment. It can be built on any operating system including PalmOS, EPOC, Windows CE, FLEXOS, OS/9, JavaOS, etc. It provides service interoperability even between different device families.
Client software designed to overcome challenges of mobile handheld devices that enables wireless access to services such as Internet information in combination with a suitable network server.
With minimal risk and investment, WAP enables operators to decrease churn, cut costs, and increase revenues by improving existing, value-added services and offering exciting new informational services.
Being a global open specification suite, WAP has generated the critical mass for manufacturers. This has opened up new product and marketing opportunities in the wireless industry and provides new revenue to participating companies.
Working meetings are open only to Open Mobile Alliance members. However, the Open Mobile Alliance often holds open meetings alongside the working meetings where any interested party or prospective member can hear about OMA technology, current activities and ask questions.
A complete calendar of Open Mobile Alliance events can be found.
Bluetooth is a local area low power radio link between devices. Many of the usage scenarios for Bluetooth will also involve one of the devices communicating over the air using WAP. While many Bluetooth members are also WAP members, and it is expected that many future handheld wireless devices will deploy both Bluetooth and WAP technology, the two technologies fundamentally address different problems.
Yes, WAP has been designed to be as independent as possible from the underlying network technology.
Even as bandwidths increase, the cost of that bandwidth does not fall to zero. These costs result from higher power usage in the terminals, higher costs in the radio sections, greater use of RF spectrum, and increased network loading. In addition, the original constraints WAP was designed for -- intermittent coverage, small screens, low power consumption, wide scalability over bearers and devices, and one-handed operation -- are still valid in 3G networks. Finally, we can expect the bandwidth required by application users to steadily increase. Therefore, there is still a need to optimize the device and network resources for wireless environments. We can expect WAP to optimize support for multimedia applications that continue to be relevant. If WAP is very successful in mass-markets on 2.5G networks, 3G networks may be needed purely for capacity relief.
