Deployment of multi-layer TDMA cellular network with distributed coverage for traffic capacity enhancement

Hierarchical architectures in the third-generation-cellular Network

“…3). In [16] another structure for tiered cellular networks 'is described. Transmitters (relays) are deployed instead of smaller cells.…”

“…Figure 3. A macrocell andponabk microcells. power of a mobile subscriber (MS) can he reduced, frequency reuse increases, A directed rely schcme is used in [16] to improve spectrum efficiency.…”