With the development of modern electronic technology days, people's personal information tools - mobile phones, not only the appearance is getting more and more beautiful, but also connect the Internet anytime, anytime. Then you have to start there is a non-general WAP phone.
The WAP phones and the general phones differ from its built-in micibrowser, cache, and memory. It is a new communication tool that collects mobile phones and mobile computers, not only has the function of ordinary phones, but also browsing the WAP website, sending and receiving email, fax, view stock market quotes.
For the mobile phone market, although WAP is not the most advanced technology, we usually see only WAP's appearance, do you know how WAP is programmed? What is the programming environment? The programming model of WAP (wireless application protocol) is based on a web programming model. So you should have a certain understanding of the web programming model, WAP page usually use WML write.
The first is the environment
Establishing a browsing environment is very simple, there are a lot of free download WML browsers. For example: WinWap is a WML browser running under Windows operating systems. Just enter the URL address that provides the WML content service, you can browse the WML page. The operation process and Internet Explore are very image. The advantage of this way is that it is easy to implement and easy to learn. However, due to the browser under Windows, most of the WML tags are supported, and the window interface can expand and shrink, so the simulations on the phone are very different. Another editor, compile, and debug an integrated environment is also available.
Secondly, the simulation environment
The simulation environment is to implement WML browsing by using the WAP mobile simulator provided by mobile phone companies. The simulator that can be downloaded online provides a complete integrated development environment. This way provides a simulator that integrated environment and WAP phones. However, it is difficult to use the simulator and its products, and there is no participation of the gateway (some simulator can set the gateway), so this is an incomplete test, especially related to WTA (WiReless Telephony Application) There is no way to test. Such an environment is sufficient for development stages.
Finally, the actual environment
According to the location where the gateway is located, the establishment of the actual environment is divided into three types:
1. Use mobile operators' dial and gateway. 2. Use the public gateway (on the Internet, there are some public gateways). 3, use your own gateway (through dial-up, using simple dial-up access software and free gateway).
However, in contrast, the WAP gateway provided by mobile operators is less than the other two ways. For example: mobile operators stipulate that the WAP Internet fee is 0.2 yuan / minute. If you use direct dial-up to your own gateway, you should pay at least 0.4 yuan / minute. Unless there is special requirements (for example: establishing a WAP network within an enterprise or considering security issues)
The current price of WAP mobile phones is obviously not like that year, but from practical performance, WAP phones still have money.
First, the WAP phone is small, strong, and simple operation. Such as Japan's Fujitsu F503i, the body size is only 135mm × 46mm × 15mm (high × width × thick), the weight is only 77g, but the liquid crystal screen uses a width 120 × vertical 160 lattice color 256 color liquid crystal, full angle 1 text × 10 line title line, the phone book 500 groups (2 numbers, 2 addresses each group) hour.
Second, the built-in operating system and browser's WAP mobile phone, the performance is stable, and the system will not cause the system because of false operation, you can transfer data with your computer and laptop, you can quickly transfer data and images, or support Chinese short information, This allows people who don't understand the computer to master all kinds of internet operations in a short period of time, browse colorful mobile Internet. The author's mobile phone can watch mail on Yahoo, but only the mail name can be seen, which has a big relationship with your mobile phone. The online surfing with WAP phones is the most fashionable thing. However, due to objective conditions, the WAP mobile phone is still not so respect.
1, mobile Internet access is slower
Since WAP is loaded with circuit exchange data, mobile phone users should take up a business channel, and when there are several users in a cell, they will cause wireless networks when using wireless channels for a long time, and other users cannot access. The internet. In addition, when the mobile switch and the access server are used 3.1 kHz voice connection, the user's data call setup time will last for 30 seconds to 1 minute. This is nothing to fix the user, but it is difficult to mobile users. Endure.
2, low transmission rate, unstable connection
The highest user access rate currently available at GSM circuit data services is 9.6kbps. Some small data amount text information can only be transmitted at this rate. In addition, due to the problem of wireless network drop, the connection is not stable, the so-called connection timeout will occur.
3, WAP standard is increasingly mature
There are some problems between compatibility between various manufacturers WAP products, especially between WAP terminals and WAP gateways in different manufacturers. The WAP products of each manufacturer have limited functionality based on WAP1.1 standards. And now is more powerful WAP 2.0.
4, online practical information gradually increase
Due to technical reasons, the current WAP gateway cannot be converted to HTML and WML, so the WAP phone cannot browse the normal web page, and only browse the web page written with WML. The number of websites currently written in WML is small, which greatly limits the ability of mobile phone users to get information. Existing WAP websites should develop innovative content for mobile users, leading the fashion trend of mobile Internet access, only this can drive the enthusiasm of mobile phone users like using computer Internet.
Therefore, the mobile Internet is really popular, and there must be two premise. First, WAP must be easy to operate. Second, network operators should step up the basic construction of the WAP network, so that the WAP mobile phone truly uses the place.
Due to the Domestic SIM cards can be divided into: "Unicom" and "Mobile". Due to the respective provinces and cities of the domestic provinces, the WAP equipment used is not the same, even if they belong to a family.
The actual establishment of the actual environment is very similar. Buy some mainstream WAP phones to open the WAP service. There is a web server on the Internet for testing. Connect the WAP phone to an existing gateway, you can really enjoy the WAP service.
Due to the domestic WAP network is still in the primary stage, the stability of the network is difficult to guarantee. China WAP users are still limited, and the speed is slower is also a problem.
At present, many people say that WAP is outdated technology. The author refuses, in fact, the products and technologies are connected, and now the mobile phone is basically adopted by WAP browser, additional GPRS, CDMA, WCDMA technology, the author will give it next time. Everyone introduces.
