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In a hexagonal cellular layout, a cluster of N cells shares the full channel set, so each cell gets total channels divided by N. The co-channel reuse distance is R x sqrt(3N), so larger clusters push interferers further away at the cost of fewer channels per cell — the fundamental capacity versus quality trade-off in frequency planning.
Frequency reuse
channels per cell = total / N; reuse distance D = R x sqrt(3N); D/R ratio = sqrt(3N)
Only N = i^2 + ij + j^2 for non-negative integers, giving 1, 3, 4, 7, 9, 12 and so on. That constraint comes from the geometry of tiling hexagons.
Not in the classic sense. OFDMA systems reuse all frequencies everywhere and manage interference through coordination and beamforming instead, which is reuse factor 1.