Table 1 Main differences among the four FFR schemes
From: Layered video multicast using fractional frequency reuse over wireless relay networks
FFR scheme | Synchronization among neighboring cells | BS power | |
|---|---|---|---|
| Â | Â | Step 1 | Step 2 |
Hard | No | Normal | Normal |
Traditional | Yes | Normal | None |
Soft | No | Low | Low |
Two-step power soft | Yes | Low | Normal |