This is more expensive and costly to do, and there are some options.
1. Wireless signal transmission is different depending on the device, the transmission distance is not the same, and due to the transmission of the middle of the wall and other objects such as blocking, will lead to weakening of the wireless signal.
2. To achieve large area coverage, you need to buy wireless devices and switches that have strong wireless signals, long transmission distance, and strong penetration ability, which will ensure that more locations can search for wireless signals.
I. Introduction to wireless networksWireless networks include both global voice and data networks that allow users to establish long-distance wireless connections, including infrared technology and radio frequency technology optimized for short-distance wireless connections, and wired networks are very similar to the use of the biggest difference lies in the different transmission media, the use of radio technology to replace the network cable, can be used as a wired network and each other. Backup, like KFC, CHINANET, CMCC, or some large supermarkets, as long as the wireless network is covered by the wireless network can be wireless Internet, but some wireless network is someone else to spend money to buy and set up a private Internet access password, it is certainly not wireless Internet **** enjoy.
The solution
Program 1
First generation or second generation of wireless LANs: fat wireless AP bridging
1. Use multiple high-power antennas to amplify the wireless signal, and set up multiple wireless nodes for wireless AP signal bridging;
2. Other wireless AP equipment is not expensive, only the high power antenna price is higher, 24DB. antennas are more expensive, the price of antennas above 24DB is around 3000;
3. At least four pairs are needed for point-to-point wiring.
Program 2
Third-generation wireless LAN: wireless switch + thin AP technology
1. Use wireless network coverage similar to the hotel. In the back of a switch connected to a wireless AP, wireless AP distance from the switch is less than 100 meters.
2. Wireless AP is a bridge of communication between wireless and wired networks. Because the coverage of the wireless AP is a circular area spreading outward, therefore, should try to place the wireless AP in the center of the wireless network, and the straight-line distance between each wireless client and the wireless AP is preferably not more than 30 meters, in order to avoid communication signal attenuation due to too much communication failure.
3. This technology mainly provides two-way access from wireless workstations to the wired LAN and from the wired LAN to the wireless workstations, and the wireless workstations within the coverage of the access point can communicate with each other through it. In a wireless network, the wireless AP is equivalent to the hub of the wired network, which can connect each wireless client, the network card used by the wireless client is a wireless network card, the transmission medium is air, it just connects the wireless client, but can not enjoy the Internet through it ****.
Program three
Wireless network coverage solutions for buildings
Security, manageable, expandable wireless program:
Four-generation wireless LAN: wireless switch + can be fat or thin wireless AP structure?
(I) Technical Background
Wireless Local Area Network (WLAN) is a mature technology, at present at home and abroad, all kinds of schools, enterprises, home users are gradually in the popularization of the application. Domestic and foreign WIFI, WLAN market is very hot, urban wireless coverage, enterprise wireless LAN construction, campus wireless coverage, wireless bridging, wireless positioning, wireless network monitoring and other technologies are being more and more widely used.
(B) wireless coverage solutions
In order to solve the high-rise building wireless local area network coverage, and provide reliable, stable and safe operation, special from the high-performance, high-speed, low-cost aspects of the building to provide wireless coverage of the overall solution.
1? Design Objectives
The indoor and outdoor wireless network coverage and Internet access of a 10-story building, to build an easy-to-use, secure, manageable and scalable network environment for mobile office, learning, and entertainment in the area at a small cost.
The WLAN system, when completed and used, seeks to achieve the following goals:
(1) Wireless coverage of the entire building (***6 floors) and 2500 square meters of outdoor plaza (50*50), which can meet the demand for multi-personnel, high-traffic wireless data transmission
(2) To make this wireless network have a 40M fiber access
(3) In the case of continuous development of the network scale, the system should be able to continuously upgrade and expand
(4) In the network center can control each AP and wireless users.
(5) After the completion of the network, it is possible to control the flow of users in each wireless LAN to achieve the purpose of network load balancing.
(6) Give full consideration to the security of WLAN, using advanced WLAN security technology to ensure.
(7) The system should be easily and flexibly adjusted and expanded.
(8) The system supports failure hot standby redundancy capability.
2. ? Design Principles
(1) reliability principles
Wireless LAN technology used to support international standards or industry standards, do not use a vendor-specific technologies and protocols to ensure the interoperability of network equipment, in favor of network investment protection.
It is recommended that a third-generation wireless switched LAN system be used to complete the wireless LAN coverage project.
(2) Principle of technological advancement
① Abandon the first, second and third generation of wireless LAN architecture
The first generation of wireless LAN mainly adopts the fat AP architecture, each wireless AP is an independent individual, and there will not be any communication between the AP and the AP, and it needs to be configured and managed on a unit-by-unit basis, which is time-consuming, labor-intensive, has a high maintenance cost, is low in security, and has poor convergence.
The second-generation wireless LAN incorporates authentication gateway devices, which still can't centralize the management and configuration of APs;
The third-generation wireless LAN architecture adopts the structure of wireless switch+thin wireless APs, which makes the wireless LAN network performance, network management, and security management capabilities to be greatly improved, making the construction of large-scale wireless networks possible. But it can not be adjusted with the network technology progress to do the recent expansion.
②The use of fourth-generation wireless LAN architecture, wireless switch + fat and thin wireless AP structure, with the popularity of 802.11n, four-generation technology has become the trend of development.
(3) the principle of safety and reliability
① access authentication: with support for a variety of user authentication methods;
② full encryption of the data link;
③ radio wave monitoring capabilities, wireless intrusion detection and tracking of the location of wireless terminals.
With the ability to provide intelligent radio wave automatic regulation and switching to ensure that a single AP access point in the event of failure automatically switched to the neighboring AP, will not affect the wireless access services; with support for hot backup wireless switch redundancy backup mechanism.
(4) flexible expansion and upgrading principle
Through a centralized wireless LAN network management platform to achieve the configuration and management of all the AP functions, AP in providing wireless access at the same time, but also for wireless intrusion monitoring, radio wave transmission analysis. At the same time, the whole system can be expanded according to the user's needs on the scale, after the expansion of all the functions and management mode remains unchanged.
(5) the principle of easy management and maintenance
In terms of network management, must have a centralized control, intelligent regulation, automatic recovery, system redundancy and other practical functions, so that the wireless network can be built to adapt to a variety of changes in the environment, can dynamically ensure that a good application. At the same time, it should also support multiple SSIDs, so that it is easy to separate the management of voice, video, and other types of data applications.
3. ? System Program Design
(1) Design of the wireless LAN system diagram
Description:
① 10 floors of the building **** (including the ground floor restaurant), each floor is designed with 4 wireless indoor APs for its wireless network coverage. *** 40 units.
② By installing 2 outdoor wireless APs on the roof of the building or on the 5th floor in the middle of the building, the 2500 square meters of outdoor plaza will be covered by wireless network.
③ Design two POE switches to supply power to all APs. One of them is arranged on the 8th floor to supply power to the APs on the 6th, 7th, 8th, 9th and 10th floors, and the other one is arranged on the 3rd floor to supply power to the APs on the 1st, 2nd, 3rd, 4th and 5th floors.
④ Install an Internet behavior management and control network device in the network room to control the user traffic in the entire wireless LAN to achieve the purpose of load balancing.
(2) Topology diagram of wireless network coverage
(3) Advantages of the program
1. Fast transmission rate
The device is a Wi-Fi access point specially designed for wireless network coverage on campus, which operates in the 2.4GHz frequency band and adopts MIMO, OFDM and other technologies to provide up to 300Mbps wireless data transmission rate. It adopts a ceiling-mounted design, which does not affect the effective use of space, and at the same time, it has built-in multiple antennas for wide coverage.
2. Strong penetration
The device has built-in antennas, which can provide greater coverage and stronger signal penetration, and the effective indoor coverage distance can reach more than 200 meters;
3.
In addition to the wide coverage and strong performance, the device also supports 802.3 at PoE power supply, automatic maintenance and other functions, the use of its cost is quite low, the price is quite good, it is worthwhile to equip the use of large enterprises.
4. Easy to deploy and maintain, saving effort
The device is designed for complex environments and can achieve perfect coverage and easy maintenance.
5. ? Supports centralized management
Supports unified management based on the X86 platform, which allows unified management of IP, SSID, encryption, and so on, for APs in the LAN through the management software provided on the PC.6.? Standard PoE power supply
Supports standard 802.3 af PoE power supply, eliminating the need for power adapters and providing security.
7. Beautiful design
The device supports 802.3af PoE power supply, which ensures that users can realize wireless wide-range coverage without changing the original power network.