Wireless network technology and development

After the end of the short contact with WAP, wireless applications finally ushered in the real sense of the climax. See how comfortable these wireless internet people are in the photos, and know that wireless networks have come into our lives in a lightning-swift way. But what is the sanctity of wireless networks? What is the status of its application in China? How will it change our network usage habits? And what is the future?

The evolutionary history of PART1 wireless networks

The rapid advances in computer technology have made us have higher expectations for practical applications.

Gigabit network Technology has just met us, wireless network technology and quietly approaching. Admittedly, performance and convenience is always the development of it technology two major direction, and products in the convenience of breakthroughs often come more slowly, need to overcome more technical difficulties, and therefore more valuable.

Historical footprints say that the historical origins of wireless networks may be earlier than you might think. The initial application of wireless networks can be traced back to the Second World War 50 years ago, when the U.S. Army used radio signals to transmit data. They have developed a set of radio transmission technology, and the use of a relatively high intensity of encryption technology, the United States and allied widely used. The technology has inspired many academics, and in 1971, researchers at the University of Hawaii created the first wireless communication network based on encapsulation technology. This is known as the Alohnet network, which can be considered a fairly early wireless local area network (WLAN). It includes 7 computers, which use a two-way star topology across four Hawaiian Islands, with central computers placed on Oahu I.. From this point on, the wireless network can be said to be officially born.

Although most networks are still wired architectures, the use of wireless networks has grown in recent years. Wireless networks are playing an increasingly important role in academia, medical, manufacturing, warehousing and so on. In particular, when wireless network technology is combined with the Internet, its ability to burst out is beyond anyone's estimation. In fact, we do not fully believe that we have never been exposed to wireless networks. From a conceptual understanding, infrared transmission can also be considered a wireless network technology, but only infrared data transmission, but not network. In addition, radio-frequency wireless mouse, WAP mobile internet and so on have a wireless network characteristics. Therefore, we simply do not need to hold a sense of mystery to wireless network technology, can be widely understood as the network technology without cable binding, nothing more. (Computer science)

Lesson

Not any technology can achieve great success, in addition to their own technical advantages, the objective existence of customer groups, cost factors, industry support, these can not be ignored. However, WAP is more like a castle in the castles, after a short year of hot after the dead. Lenovo to the fiasco of WAP, many people can not help for this new round of wireless network of the tide pinch a sweat.

From a technical point of view, the original WAP is completely unsatisfactory. Poor bandwidth has almost wiped out the user's interest, and downloading a dim phone screen is no fun. In contrast, the combination of computers and mobile digital devices closer to the WiFi, CDMA, GPRS and other technologies is more practical value. Today, a variety of CDMA and GPRS corresponding ancillary products continue to emerge, and thus led to the decline in costs.

Experience has shown that if the ability and quality of wireless technology is too much to be cashed, it is bound to be severely criticized by all sides, and conversely, if too cautious, the market will complain. From the development process of WAP and Bluetooth technology, it is obvious that there are some signs of hype. And now the industry's attitude towards wireless applications is more pragmatic, hardware cost reduction has become a consensus, the corresponding software development is also underway.

WiFi Ignite Fuse

From the earliest infrared technology to the high expectations of Bluetooth, and even today's hottest IEEE 802.11 (WIFI), wireless network technology step-by-step towards maturity. However, to talk about the industry's influence, I am afraid that no one can compare Wi-Fi, the wireless network technology with a near-perfect performance to conquer the industry. For any technology, it is the most happy to be able to be integrated into the mainstream products by monopoly-level manufacturers, so as to popularize quickly. In today's Intel's latest Centrino notebook, the wireless network module becomes the platform standard. So far, Intel has a market share of around 80% per cent in the mobile personal processor market, creating an undervalued user base.

The standard dispute is not incompatible

CDMA and GRPs's wireless technology war has made us smell strong, but that doesn't mean all wireless technology is confrontational. To a certain extent, a variety of wireless technology standards are made up, they jointly prop up the whole wireless technology overall situation.

The three most popular wireless technologies at the moment are WiFi, Bluetooth and HomeRF, which are positioned differently. WiFi has a very obvious advantage in bandwidth, reach 11~108mbps, and the effective transmission range is very large, its few flaw is the cost is slightly high and power consumption is big. In contrast, Bluetooth technology in terms of bandwidth, but low cost and low power features or let it find enough space to live. Another kind of wireless LAN technology HomeRF, is specially designed for the home user. Its advantage is cost, but its industry support is far less than the first two.

In general, WiFi is better suited for corporate wireless networks in the office, HomeRF can be applied to mobile data in the home and communication between voice devices and hosts, while Bluetooth technology can be applied to any wireless way to replace a cable. At present these technologies are still in a state of coexistence, and in the long run they will move towards convergence. In addition, infrared technology has not completely disappeared, even RF technology is active in the market.

New opportunities for PART2 wireless technology

Telecom operators chattering in the 2.5G/3G network of "mobile TV", but the effect is not flattering; radio and television operators want to use terrestrial digital broadcasting to promote, unfortunately less interactive function and the support of IP; the lack of a smooth network environment, content giants and large and small value-added service providers are powerless, Have the strength of the first horse rodeo, no strength can only wait. However, this is only our complaints and short-sighted. At present, the wireless video transmission technology is developing unceasingly, although the current effect is frustrating, but its foreground is certainly very broad, and already has the solid technical Foundation.