Radio Cell Planning


STEP 2: NOMINAL CELL PLAN



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2G Cell planning

STEP 2: NOMINAL CELL PLAN

  • Coverage predictions
  • Composite coverage synthesis
  • Co-channel interference predictions
  • Adjacent channel interference predictions
  • For example, if there are doubts about the risks of time dispersion at a particular site the following steps could be taken:
    • The site location could be changed
    • The site could be measured with respect to time dispersion
    • The site could be analyzed with a carrier–to–reflection ratio (C/R) prediction tool.

STEP 2: NOMINAL CELL PLAN

  • Radio Propagation
    • In reality, hexagons are extremely simplified models of radio coverage patterns because radio propagation is highly dependent on terrain and other factors
    • Problems affect the coverage of an area:
      • path loss
      • Shadowing
      • multipath fading
      • time dispersion is a problem caused by the reception of radio signals, which are reflected off far away objects
      • The carrier-to-reflection (C/R) ratio is defined as the ratio between the direct signal (C) and the reflected signal (R).
      • time alignment (MS can be from a BTS is 35 km)

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