Outdoor application analysis of Wireless Bridge

Wireless Bridges are mainly used to connect two independent networks. Therefore, most outdoor applications use wireless bridges, then let's analyze the relationship between the outdoor environment and the establishment of the Wireless Bridge. See the following for details.

Wireless connection between LAN

In the face of various obstacles in the project implementation site, including complicated terrain between two information points, limited funds, and demanding bandwidth, the network construction scheme can be cleverly formulated, connect several independent LAN networks with the least number of devices. Especially in terms of costs, it is no longer possible to deploy optical fiber cables in areas where cable networks are difficult to deploy. The cost of leased lines is expensive and will increase as the use time increases, the wireless microwave technology solution does not have such a problem. After successful installation and debugging, the cost is almost negligible. The cost mainly comes from the investment in the equipment purchased in the early stage, the current mature wireless microwave technology solution provides 11 m transmission bandwidth, which is unmatched by DDN and other leased line lines. In fact, outdoor applications of wireless bridges have always been the focus of wireless applications.

Main outdoor applications

In general, the application of wireless bridges can be divided into three aspects:

First, it is on a large campus or plant. In general, the distance between a building and a building is usually more than 100 meters. Generally, optical cables are required for connection. For some existing campuses or factories, it is costly and labor-consuming to excavate roads or set up air lines. Using Wireless Bridges to achieve network interconnection is both economical and easy to implement.

The second is to connect different branches in neighboring urban areas and towns. In the past, we often used leased lines. In this way, we have to pay an expensive leased line rental fee every month, and the bandwidth is limited (generally from 64 K to 2 m, the maximum bandwidth is 2 Mbps ). The wireless bridging scheme not only saves regular expenses, but also greatly increases the speed to several megabytes to dozens of megabytes.

The third is temporary network transmission in some temporary locations. For example, when publicizing the stage results of the Three Gorges Project, the stadium event coverage project only needs to build a temporary network connection by setting up a wireless bridge at the site, so that on-site live broadcasting can be implemented. For large outdoor activities such as news network live broadcast, due to the temporary and non-fixed nature of the site, it is not only difficult to wiring and maintain the network cable in the live broadcast site using the traditional wired method, it also brings a lot of trouble to the on-site network management. Application wireless networks have shown irreplaceable advantages in these scenarios.

What should a Wireless Bridge have?

Wireless Bridges should support point-to-point, point-to-point, and multi-point bridging methods, multiple buildings in hard-wired locations, offices, schools, companies, Changing Workplaces, temporary LAN, hospitals and warehouses, and large factory areas can be connected. For example, the SMC EliteConnect Wireless Bridge uses the WDS technology to implement the bridging function. The DS distribution system is the backbone network connecting AP and AP in a wireless LAN. It is usually implemented through a traditional wired Ethernet. In fact, WDS uses the Bridge Function of the Wireless Bridge to interconnect AP to achieve this wireless DS. Therefore, using multiple wireless bridges that support the WDS function and the corresponding antennas can achieve large-scale wireless coverage, such as covering the stadium or a public square.

In addition, because wireless bridges often have special requirements for network construction, it is difficult to find power supply nearby. Therefore, it is very important to have the PoE (Ethernet power supply) capability. For example, to support the 802.3af international standard Ethernet power supply, 12 v dc power supply can be provided for the bridge through five lines. Wireless Bridges should also be simple and easy to manage. For example, EliteConnect wireless bridges can be managed through Web or SNMP, and free EliteView network management software provided by SMC can be used for easy management. It also has advanced link integrity detection capabilities. When it is used as an AP, It can automatically detect whether the uplink Ethernet connection works normally. Once the uplink line is disconnected, the connected wireless workstation is automatically disconnected, so that the disconnected workstation can be detected in time and other available APS can be searched, which significantly improves the reliability of network connections, it also provides convenience for timely locking and troubleshooting.