What Is a WLAN Card?

WWLAN technology enables laptop computers or other devices to connect to the Internet anywhere within the coverage of a cellular network. The major wireless service providers (Verizon Wireless, Sprint Nextel, etc.) provide broadband WWLAN services with download speeds comparable to DSL.

WWLAN

Right!

WWLAN technology enables laptop computers or other devices to connect to the Internet anywhere within the coverage of a cellular network. The major wireless service providers (Verizon Wireless, Sprint Nextel, etc.) provide broadband WWLAN services with download speeds comparable to DSL.

Foreign name

WWLAN

Brief introduction

Wireless wide area network

Advantages

Unblocked use of the network

Missing point

Need to load a new network provider chip

Notebook users have been using the telephone network to obtain Internet access for several years, but now they can use cellular wireless network PC cards. The price of this PC card is about $ 50 or more, which is mainly determined by service agreements, reward discounts and so on.

Wireless Wide Area Network (WWLAN)

Wireless wide area network is a digital mobile communication network used by mobile phones and data services. It is operated by telecommunications operators such as Cingular Wireless, Vodafone, Verizon Wireless and other companies. The wireless WAN network's connectivity can cover a fairly wide geographical area, but the data transmission rate has so far been low, only 115 Kbps, far from other regional wireless technologies. At present, the world's wireless wide area networks mainly use two major technologies-GSM and CDMA technologies, respectively. It is expected that these two technologies will continue to develop in parallel in the future.

The European standardization of GSM is quite early. Currently, it includes GSM and related wireless data technologies: GPRS and the next-generation EDGE technology (Enhanced Data GSM Evolution), which has about two-thirds of the global market. And Asia. The new generation of EDGE technology can increase the data transmission rate of GPRS by 3 to 4 times. While other GSM players, especially those who have already purchased new 3G spectrum, focus on the WCDMA specification (Wideband CDMA). WCDMA expects data transmission rates to reach 2 Mbps. In addition, there is a set of extended technologies called HSDPA (High-Speed Downlink Packet Access), which is expected to be set up in 2006, and its data transmission rate can reach 3.6 Mbps or more.

Leading the development of CDMA technology In the United States, the construction of CDMA2000 wireless wide area network technology in North America, Japan, South Korea and China has reached a considerable scale. CDMA2000 1xRTT technology (Single-Carrier Radio Transmission Technology) has been built quite extensively. The next generation of 1xEV-DO technology (1xEvolution-Data Optimized) is also being built by Verizon Wireless and Sprint PCS in the United States. It is expected to support a data transmission rate of 2.4 Mbps. After that, the telecommunications industry will continue to develop EV-DO using Specification A to support higher data rates and VoIP (Voice over Internet Protocol) calling functions.

As long as there are service signals provided by cellular services, WWLAN technology can allow you to use the network unobstructed. This provides great convenience for those who use the network to move constantly due to their occupation or work.

Similarly, during your journey, you can also achieve uninterrupted "close contact" with the network without having to log in again, but the prerequisite is that you must be within the range of services provided by Wi-Fi. For example, you can surf the web without interruption in a moving train, but if you are using a limited series of Wi-Fi, your journey may be less enjoyable due to the intermittent network.

WiMax, Wi-Fi optional accelerator, has a larger range of services. If you use this device to achieve contact with different networks, this is the WWLAN that can connect with competitors' networks. Your journey may continue because you continue to be online. Surfing while adding many pleasant things. But you need to wait patiently. It will not be available in a few merchants until 2007. For more background, read "IDF: Intel Mobile WiMax Cards Meet the Public This Year."

If you have a built-in WWLAN chip, you are logged into a certain network. If you want to change the network provider, then you may need to ask a specialized technician to replace the built-in WWLAN wireless communication device in the notebook and load a new network provider's chip at the same time. These tasks are more troublesome.

Similarly, if you want to get broadband WWLAN Internet access, you need to sign an appropriate speed contract with the provider (unless you use Verizon's 24-hour payment for $ 15 service). Despite this, due to different plans, unlimited access to cellular network services can range from $ 60 to $ 80 a month, whether you have stated it with the user or not, it's almost the same.

Who should choose to install a built-in WWLAN connection? Here are some information I collected from the side:

Outside the office for one week or more per month.

Travel with your laptop and get unobstructed network services.

A new notebook or other situation is required.

Know which high-speed cellular data network service provider is providing you services during your journey.

If you don't know some of the above things, I think waiting is your better choice. Hold on to Wi-Fi now, or use the wireless network services provided by traditional mobile phones, like the Palm Treo 650 or 700w. Another good option is to buy a WWLAN PC Card modem from your favorite wireless service provider. (Still, keep in mind that WWLAN PC Cards will drain your laptop's battery faster.)

Cellular cellular communication system is to divide an area into several areas, each area is called a cell, each cell has a different number from other cells, so that the wireless communication in the cell can share the same type of communication with different cells Frequency without interfering with each other. The reason for using the grid to distinguish is because the available frequency of wireless communication is limited. In the available frequency range, about 1,000 channels can be used. In order to simultaneously use it for thousands to tens of thousands of users, the grid is used to distinguish users Area.