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Each the considered solution implementation is unique and requires careful preliminary planning. It is a very important stage, saving resources at the design stage can greatly increase operating costs. Within this document the radio frequency planning issues and devices placement will be reviewed.
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- Regulatory restrictions: RF regulation is determined at the legislative level. Usually, a frequency range is allocated that is allowed for free use with certain restrictions (radiated power, antenna suspension height, etc.), and a frequency range for which the permission must be obtained.
- Radio module capabilities: the wireless device radio module supports a limited set of emitted frequencies, this should be taken into account at the designing stage.
- Physical features of the electromagnetic waves propagation: propagation distance, the effect of precipitation and interaction with obstacles are determined by the electromagnetic wave frequency, which must be keep kept in mind during preliminary calculations. The radio waves propagation effects are detaily described in the Wireless Networking Fundamentals online course.
- The interference level: the operation of third-party wireless devices has a significant impact on system performance, take it into account when designing. The interference level is affected by the radiation power and the frequency channels used on third-party devices operating in the area. In addition to interference from third-party devices, the neighboring sectors can have influence on each other. Reducing interference from own devices can be achieved by using different frequency channels. Recommendations for frequency diversity are given in the TDMA and Polling: Application features document. Particular attention should be paid to the frequency channels selection in projects with multisectoral configurations in order to minimize the influence of the BS sectors on each other.
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