The basis of integrated cabling for wireless networks

Preface Analysis of Wireless network

With the wide application of network, people need to choose different network scheme according to different requirements, but the traditional wired network has a series of problems in the construction and maintenance because of the limitation of design and environment, especially when it involves network movement and re layout. Developing a feasible wireless communication network technology becomes the goal of network development.

Wireless network Overview

With the gradual maturation and rapid development of computer network technology, computer network has penetrated into all areas of society, the number of users requiring interconnection is more and more complex. In practical application, people can choose different network schemes according to different situations. However, traditional wired network has a series of problems in physics and logic due to the constraints of design and environmental conditions, especially when the network needs to move and rearrange.

Wireless network can realize computer interconnection without wiring, and realize the goal of data communication at any time and any place. The tremendous impact of wireless network technology is indisputable. With the development of computer technology, the 21st century wireless network applications will have a greater development prospects.

The development process of wireless communication

In the 1895, Marconi, a young Italian university student, conducted a radio test in the courtyard and was successful. Although the transmission distance was only 30m, it opened the curtain of human communication with radio waves.

The radio communication experiment across the Bristol Strait was successful in 1897. Marconi set up the world's first radio equipment company, the British martini Company, in the UK.

1902, the American Stepo Pei de Mishan in Kentucky State Murray City for the first radio voice broadcast.

The British Baird made his first television broadcast in 1925.

1982, Europe set up a GSM (mobile Communications Special Group), the task is to develop pan-European mobile communications standards of roaming. In 1997, the IEEE802 committee developed a wireless LAN standard IEEE80211 with a maximum data transfer rate of 2Mbps. More Wonderful content: http://www.bianceng.cn/Network/zhbx/

1999, Ehcsson, Lntel, IBM, Noba and Shiba and other companies jointly developed a low-cost, low-power, short distance wireless LAN standard Bluetooth protocol.

2001, the IEEE802 committee developed a wireless LAN standard IEEE802119, the maximum data transfer rate of 54Mbps.

Wireless network classification

At present, there are a wide range of different types of wireless networks, which are suitable for different application environments and fields respectively. According to the radio coverage, can be divided into the following 3 kinds of types.

1. Line personal area Network (Wirelesspersonalareanetwork,wpan)

In a wireless personal area network, one of the devices is a primary device, and there can be up to 7 active from devices. All devices must be located within the Lom range of the primary device, and the wireless personal area network can only cover a small area, such as a room or an office. In general, a wireless personal area network can be used to create a network in a conference room that includes a plurality of portable computational flail notebooks. Wireless personal area networks use short-range wireless transmissions to communicate and transmit data between different devices.

2. Line local area network (WLAN)

At present, wireless local area network is everywhere in campus, office and Public Place. It allows multiple computers to communicate with a shared server or a fixed network access point similar to a network bridge. In a wireless LAN, all devices have a wireless modem, which has a maximum coverage of 100m. In order to achieve a wider coverage, multiple wireless LANs can be interconnected via high-bandwidth wired LAN technologies. Wireless networks provide more flexibility when the position of a desk changes. It is very common to use wireless LANs in environments where wiring is difficult.

3. Cellular Wireless Network

Cellular wireless networks can basically cover the entire country, and if neighboring countries adopt a compatible wireless network, they can cover a larger range. At the start of the design, the cellular wireless network allows users to use (portable) compatible mobile phones (including voice, text messages, photos, and images) when they leave home or office. Mobile phones are also called mobile phones (mobilephone), and cellular wireless networks are also called mobile networks.

When using a cellular network, the entire network area that needs to be covered is divided into small areas called hives (cell). Each hive has a low-power wireless transmitter that just covers the entire hive. The entire wireless bandwidth is divided into multiple sub bands and ensures no wireless interference between the two adjacent hives. In addition, because of the use of small hives, mobile phones only need to use the power of smaller wireless transmitters and smaller batteries, can become smaller. It can be seen that a set of bands with the same frequency can be reused, until it can cover the entire region, a technique called frequency multiplexing. Because wireless bandwidth is a valuable resource, the use of this technology makes wireless networks economically viable.

The basic knowledge of wireless network for everyone present so much, hope that we have mastered and understand.