1 Introduction
2 Setting the scene
2.1 Network model
2.2 Traffic model
2.3 Interference mitigation benefit
2.4 Intra-cell packet scheduling
3 Simulation methodology
Macro scenario
|
Small cell scenario
| |
---|---|---|
Network layout | 7 three-sectored sites | 3 clusters with 10 small cells each [13] |
Bandwidth | 10 MHz at 2.0 GHz | 10 MHz at 3.5 GHz |
Transmit power | 46 dBm | 30 dBm |
User arrival rate, λ
| 0-4 users/s/cell | 0 to 30 users/s/cluster |
Path loss model | ITU-R UMa [21] | ITU-R UMi [21] |
Antenna pattern | Directional, 70° beamwidth [21] | Omnidirectional |
Receiver type | MMSE-IRC | |
Traffic model | Poisson arrival, finite buffer | |
Payload size, L
| 0.5 Mbytes | |
Transmission mode | 2 × 2 MIMO, single user | |
OFDMA symbols/TTI | 13 | |
β (for GPF) | 0.6 |
4 Performance results
4.1 Traffic load region analysis
Scenario
| ||||
---|---|---|---|---|
Macro cell
|
Small cell
| |||
Traffic region
|
Offered load
|
Ave. perc. of
|
Offered load
|
Ave. perc. of
|
(Mbps)
|
active cells (%)
|
(Mbps)
|
active cells (%)
| |
1 | 2.5 | 8.7 | 25 | 6.9 |
2 | 5 | 22.8 | 50 | 20 |
3 | 7.5 | 43 | 75 | 41 |