Flashcard: Cellular Capacity Optimization Techniques — 16 carte

Cell splitting — purpose?

Increase capacity by subdividing cells.

Cell splitting — power adjustment?

Reduce transmit power to maintain SIR.

Cell splitting — effect on number of cells?

Quadruples when halving cell radius.

Sectoring — purpose?

Reduce interference using directional antennas.

Sectoring — sectors per cell?

Typically 3 (120°) or 6 (60°).

Channel partitioning — within sectors?

Channels are allocated to specific sectors.

Sectoring — interference impact?

Significantly reduces co-channel interference.

Coverage zone approach — key feature?

Zones linked via high-speed links, localized base station radiation.

Microzone — main benefit?

Reduces interference, localizes radiation, increases capacity.

Microcell — typical radius?

Approximately half of original cell radius.

Microcell — power use?

Lower transmit power than larger cells.

Antenna down tilting — purpose?

Limit coverage area and interference.

Interference reduction — method?

Sectoring and localization confine signals, reduce overlap.

Handoff management — intra-cell?

Handled locally via sectoring or micro zones.

Micro zone — channel retention?

Mobiles retain same channel across zones.

Channel reuse — core idea?

Reuse same frequencies in separated cells to increase capacity.