Radio 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)