Network for Donghua University to provide broadband network solutions

The goal of LaSalle International Design Institute of Donghua University is to build a computer broadband network which is based on computer and serves the three major goals of teaching research, administration and internal and external communication. According to the specific needs of Donghua University, the United States has adopted a wireless LAN solution based on IEEE802.11G, which provides a new network access mode and ubiquitous network connection through wireless plus wired local area network connection.

LaSalle International Design Institute of Donghua University Hope to use the network system, to achieve information collection, analysis, collation, and the visual, audio and text, multidimensional pictures, such as individual or comprehensive manifestations and methods, applied to college teaching; At the same time, because of the mobility of teachers and students, And with the popularity of laptops and the growing demand for Internet access, teachers and students are pressing for access to these places. Wired network in front of the above problems appear powerless, the United States Web Parts after repeated demonstration, finally adopted a wireless network design scheme.

Cover all Floors
The building has a total of 3 floors, because the floor of the wireless signal barrier is very strong, usually each floor is configured to separate the service area, the AP in each service area through the Super five-type twisted pair and the third floor of the computer room switch connected. According to the floor room distribution and provide access to effective user bandwidth considerations, if the classroom computer is more, can add an AP, basically ensure that each AP access to up to 30 wireless users.

Because the wireless access point is placed in the classroom ceiling, and this location does not have the corresponding power supply facilities, so the use of Ethernet power, through Ethernet to the WG602 to provide the required power. Therefore, the use of the U.S. network of Ethernet power supply module to the wireless access point WG602 power supply.

Indoor walls and many other obstacles, the rate will be automatically adjusted to the wireless signal, so that the acceptance of data becomes unstable. In order to improve the wireless signal penetration, so that each floor can receive a stable wireless signal, each AP is equipped with 5dBi omni antenna to enhance, placed in the floor center of the ceiling. In the case of multiple sub channels working at the same time, in order to ensure that the channels do not interfere with each other, the central frequency interval of two channels must not be less than 25MHz. The AP's working channel is arranged as follows: Third floor (Channel 1), Second floor (channel 6), first floor (11 channels). The entire project uses 9 AP, not only for each floor of each classroom wireless coverage, and through the wired Ethernet convergence switch access to the East China University campus network. So that the vast number of teachers and students in the new teaching building can share all the information on the campus network and access the Internet through the campus broadband outlet. In order to ensure the speed of wireless network, the College adopts the method of multiple placement of access points to achieve high density coverage, so that different data and video and audio files can be transmitted on the whole network.

Provides M-bandwidth
AP devices in this program use the WG602 of the American Mesh, which operates in the frequency band of the 2.4 GHZ and can be covered within the diameter m by the rate of Mbps in the room. The M bandwidth enables the user not only to transmit the ordinary data packet, also may transmit the video and the audio and so on multimedia file, provides the foundation for the wireless LAN deep Application; WG602 provides wireless local area network security that supports 40-bit (also known as 64-bit) and 128-bit WEP wired equivalent encryption, MAC Address filtering and SSID service area identifiers. And can also support 802.1X and WPA through software upgrades, backward compatibility features, so that a number of previous 802.11B products investment is not wasted. Wireless card can be selected Netgear company full range of 802.11g 54Mbps CardBus Laptop Wireless adapter card WG511 and Wireless PCI card WG311 for desktops. You can also take advantage of the built-in "Centrino" 802.11B network card in your notebook, with only a rate of Mbps and no compatibility issues with WG602.

User profile
Donghua University International Design Institute was founded in 1994, the first batch of Shanghai to obtain state-approved Sino-Foreign Cooperative College, Donghua University is also subordinate to the two-level college. The college is a Singapore listed company--Leverslassal College Group Investment Management, the site is located at the National Key University of Donghua (formerly China Textile University) campus, in March 1995 officially to the domestic and foreign enrollment, currently in the school's domestic and overseas students have more than 1000 people.