In the wireless transmission, we often use bridges, and then for long-distance or obstacle environments, we have to use relays. Yesterday, friends in the weak VIP group mentioned similar problems. Xiao Bian and everyone learned about them together. Wireless relay applications.
When wireless bridges are used in wireless monitoring, there are three types of networking and transmission methods: point-to-point transmission, point-to-multipoint transmission, and relay transmission. However, in practical applications, the relay mode is still relatively infrequent. First, it will increase the cost, and second, there will be some loss in the signal.
However, there are times when you have to use relays. For example, the on-site environment is not ideal. There are always there or there blocking the wireless bridge transmission lines, such as buildings, buildings, trees, etc. If you do not want to change the line, Only relay transmissions can be used.
The relay mode is to use the connection function between wireless bridges to transfer wireless signals from one relay point to the next relay point to achieve signal enhancement and form a new wireless coverage area, eventually reaching the extended wireless network. The purpose of the coverage.
Here is the difference between trunking and bridging. Point-to-point transmission or point-to-multipoint transmission of a wireless bridge belongs to the category of bridges, and relay transmission belongs to the category of relays. There will be two separate SSIDs for the bridge. Even if the SSID is set to be the same, multiple numbers will be displayed. However, no matter how many bridges the relay connects, there is only one SSID.
The purpose of bridging is to connect two or more different networks in order to expand the coverage of wireless networks. The purpose of relaying is to expand the coverage of the same wireless network. In general, the essence of bridging and relaying is different, but the purpose is the same.
There are three different ways of relaying: single mode single wireless bridge relay, single mode dual wireless bridge relay, dual mode/multimode single wireless bridge relay.
Single mode single wireless bridge relay
A single-mode single-radio bridge relay uses a single-mode wireless bridge as a relay point, and then is divided into two antennas through a power splitter. One antenna is connected to the wireless bridge of the monitoring point, and the other antenna is connected. Wireless bridge monitoring center. Although this is the most cost-effective mode, the use of power splitters will reduce bandwidth by more than half, so in some large-scale projects or projects with high bandwidth requirements, this relay mode is not generally used.
Single-mode dual-radio bridge relay
Single-mode dual-radio bridge relay, using two single-mode wireless bridges as relay points, using switches to connect the two wireless bridges, one of which is aligned with the monitoring point of the wireless bridge, used as a receiving signal, and the other One is a wireless bridge that is aligned with the monitoring center and used as a transmission signal. This method is less costly, and most applications are in projects that require longer transmission distances, avoid shielding, and require higher transmission bandwidth. The disadvantage is that there are many equipments to use and the cost is high.
3. Dual Mode/Multimode Single Wireless Bridge Relay
A dual-mode/multi-mode single-radio bridge relay adopts a dual-mode or multi-mode wireless bridge as a relay point, and two- or more-faced antennas are aligned with the wireless bridges in each direction monitoring point as a receiving end. The antenna of the monitoring center wireless bridge serves as the transmitting end. With the advantages of dual-mode or multi-mode, the cost of multiple wireless bridges can be saved, and power splitters or switches do not need to be used, making installation easier. This kind of relaying method is mostly used in monitoring engineering or component MESH networks with long transmission distances, high transmission bandwidth requirements, avoiding obstructions, and multiple relay points. The disadvantage is that the price of such devices is high. But the relative performance is stronger.
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