1. Introduction
2. Related study
3. Problem formulation
3.1 Network model
3.2. The proposed framework
4. PU arrival activity
5. Algorithm
Algorithm: FEPO spectrum sharing scheme
6. Results and analysis
Parameter | Values |
---|---|
Slot length | 1 s |
Transmission period | 0.9 s |
Sensing period | 0.08 s |
Channel eviction period | 0.02 s |
Number of channels | 3 |
CR user pairs | 2 |
Channel gain | 0-1 |
Noise variance | 0.2-0.7 |
Minimum data requirement | [0.5, 0.7, 0.8] |
Transmission power | 30 dB |
6.1. Impact of selecting transmission the modes and variations in the channel condition on data rate
6.2. Channel eviction activity, sum rate, and channel sharing pattern
Channels | Slot number | |||||||
---|---|---|---|---|---|---|---|---|
1
|
2
|
3
|
4
|
5
|
6
|
7
|
8
| |
1 | SU1 | PU | SU1 | SU1 | PU | SU1 | SU1 | SU1 |
2 | SU2 | SU2 | PU | PU | PU | SU2 | SU2 | - |
3 | SU3 | SU3 | SU3 | SU3 | PU | SU3 | SU3 | - |
Sum rate (kbps)
| 6.90 | 2.62 | 4.52 | 2.75 | 0 | 3.97 | 4.82 | 0.22 |