Microwave Band Division and Broadband Access Analysis of Outdoor Stations
With the development of mobile networks and the improvement of user experience requirements, the wireless access network can realize the optimal deployment of the macro station level by adding small stations to the RAN. The deployment of high-density small stations is an inevitable choice for future networks. The deployment of outdoor stations is an important part of the deployment of small stations. However, the location of outdoor stations is not an easy task because: a. The rapidly changing cities make the network coverage dynamic. b) The city does not have accessible fiber or copper resources at any location. c) The typical all-outdoor station is installed on the street decoration or on the surface of the building, 3-6 meters high from the street, and the distance between stations is 50-300 meters; it is not the ideal site for the outdoor station access point. Visual traditional microwave transmission conditions. Based on the understanding and research of microwave transmission theory, Ericsson has carried out research on the “bendable†microwave transmission technology for high frequency bands above 6 GHz, which has solved the problem of outdoor small station access location. The traditional concept is: "Only low-band (below 6Ghz) is possible to achieve non-visual (N-LoS) transmission"; "only OFDM technology can achieve non-visual transmission"; "to achieve non-visual transmission to use wide beam antenna" . The real situation that challenges the traditional concept is: "Non-visual transmission can be done at any frequency." "Any modulation can be used for non-visual transmission." "Narrow-beam antenna enhances non-visual microwave performance." The following figure shows three scenarios of non-visual microwave transmission. Non-visual transmission transmission of radio wave penetration barrier Reflected transmission of reflected waves on the surface of an obstacle Diffraction transmission of a wave that is bent at the edge of an obstacle Ericsson Swedish Institute for 5.8GHz and MINI-LINK 28Ghz equipment comparison and test comparison table for non-visual transmission: Tests show that high frequency bands such as 23 GHz, 28Ghz and above bands can be fully applied to the access of outdoor small stations under non-visual conditions. Compared with the microwave link planning and deployment under the Vision condition, the only factor that needs to be considered more is the loss of the wave in the encounter with the obstacle, and the loss value is related to the diffraction angle, the shape and material of the diffraction object; Loss indicators are also not irregular. To be sure, the tools used to guide the design of non-visual microwave links are expected. Short-distance non-visual microwaves make the transmission of outdoor small stations omnipotent. Regardless of whether the site of the outdoor station is selected at any location, the station can always be transmitted back to the mobile backhaul network via Vision transmission, diffraction, reflection or transmission. Thanks to the high system gain, high performance antenna and its deep balance capability of the Ericsson MINI-LINK system, it is possible to provide high quality and high bandwidth non-visual transmission. The MINI-LINK PT is part of the MINI-LINK family of the world's most widely deployed multi-service microwave systems. Ericsson put its all-out-group microwave MINI-LINK PT on the market in a timely manner. 3G/LTE station construction and site selection requires dense sites, large capacity, IP, environmental adaptability, light and fast, and so on. The Ericsson MINI-LINK PT provides a solution for this market demand. The MINI-LINK PT is an all-outdoor microwave product optimized for pure packet network and transmits native Ethernet services via microwave. When the network only needs a single Ethernet connection, the MINI-LINK PT can be quickly deployed to implement single-hop or end-to-end connections. At the same time, it can also be deployed in combination with Ericsson's other microwave products MINI-LINKSP/MINI-LINK TN to provide CES TDM services. It is foreseeable that the non-visual accessibility of non-visual microwaves, the anti-interference capability of directional transmission, the carrying capacity of broadband transmission and the network compatibility of its all-IP will make it an outdoor small station in the operator's mobile backhaul network. Into the weapon. Biomass Gas Generator,Biomass Electricity Generator,Gas Powered Electric Generator,Gas Generator Jiangsu Vantek Power Machinery Co., Ltd , https://www.vantekpower.com
Due to its light installation, machine room requirements, and low power consumption, the MINI-LINK PT ensures operators maintain a low total cost of ownership (TCO).