Nortel Networks 411-2021-111 manual 60 N=4 sectorized frequency reuse plan

2-4Cell Site Configurations

60° sectorized configuration

In a 60° (N=4) sectorized configuration, the 416 RF channels are divided among a group of four cells. Each cell contains a maximum of 104 RF channels, with six Control channels for each cell. Since each cell is further divided into six sectors, each sector will contain a maximum of 16 or 17 RF channels, with one Control channels for each sector. The RF channels are reused by other groups of cells.

Figure 2-3 shows the layout of a 60° (N=4) sectorized frequency reuse plan. The RF channels used in Cell 1 of a cluster are reused in Cell 1 of other clusters, channels in Cell 2 are reused in Cell 2 of other clusters and so on. This arrangement will have the RF channels on the same carrier frequency in different areas to be separated from one another by the greatest possible distance so that co-channel interference is minimized.

However, 60° sectorization is difficult to expand and optimize due to a more demanding environment of frequency re-use.

Figure 2-3

60° (N=4) sectorized frequency reuse plan

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411-2021-111 Standard 01.01 June 1996