Monday 23 September 2013

Point to Multipoint Wireless Communication

Point to multipoint as the name suggests , a single point can be connected to many other points.

IN WAN point to multipont connectivity , the centre point is known as the base station and in LAN connectivity it is known as the access point.

Here I will discuss about the WAN connectivity . At microwave frequencies , 60% of the first Fresnel zone must be clear for good signal strength.

The base station is the center point so it has to be configured (frequency , channel bandwidth , IP etc) first of all and installed at the height and azimuth as per the survey report.

Other devices known as CPEs are to be configured afterwards and should be with in the coverage range as per the survey report .

In point to multipoint connectivity the base station use to have the sector antenna of azimuth 30deg , 60 deg , 90 deg , 120 deg and Omnidirectional antenna , so the CPE must be within the coverage ange of the base station for which it is configured.

The range ( link distance ) depends on the antenna parameters.

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