Table 1 System parameters. The system parameters considered in the simulation
Parameters | Value |
|---|---|
Maximum cache capacity of BS | 20 Mbits |
Maximum cache capacity of AP | 10 Mbits |
File sizes | 9, 8, 10, 9, 8, and 10 Mbits |
Content fetching delay at BS | 0.2 s |
Content fetching delay at AP | 0.3 s |
Maximum numbers of active users of BS and AP | 3 |
Minimum data rate requirements of users | 1, 2, 0.5, 0.5, 1, and 2 Mbps |
Small scale fading distribution | Rayleigh fading with zero mean and unit variance |
Channel path loss model | 128.1+27 log(d) dB, d denotes the distance |