Table 8 Characteristics comparison of the four FFR schemes
From: Layered video multicast using fractional frequency reuse over wireless relay networks
FFR scheme | Video quality for inner users | Video quality for outer users | Drawbacks |
|---|---|---|---|
Hard | Medium | Bad | Â |
Traditional | Medium | Best for outer users | Need to synchronize to neighboring cells |
Soft | High | Best for cell-edge users | Lower SINR for inner users as BS lowers its transmission power in both steps |
Two-step soft | High | Good | Must be synchronized to neighboring cells and has a more complicated power control as the BS lowers its transmission power in the second step only |