Table 4 Simulation assumptions for system-level evaluations
From: System-level performance of LTE-Advanced with joint transmission and dynamic point selection schemes
Parameter | Value |
|---|---|
Cellular layout | Hexagonal grid, 19 sites, 3 sectors per site, |
Center site simulated, 500 m inter site distance | |
Traffic model | Full buffer |
Deployment scenarios | CoMP Scenario 3 according to 3GPP 36.819 v. 11.1.0 |
Coordinated TX-points 3 macros + 12 picos | |
Carrier frequency | 2.00 GHz |
Antenna configuration | 2 Tx cross polarized (XPOL), 2 Rx XPOL |
Number of UEs | Configuration 1: 25 UEs / macro geographical area. |
Configuration 4b: 30 UEs / macro geographical area. | |
UE dropping according to 3GPP 36.814 v. 9.0.0. | |
Transmission schemes | SU-MIMO with JT |
SU-MIMO with DPS | |
UE receiver | 3GPP option 1 |
Channel estimation for feedback | Realistic CSI-RS based |
Channel estimation for demodulation | Realistic through AVI tables |
UE Feedback | Rank indicator, max rank 2. |
CoMP transmission rank same as serving TX-point rank | |
Mode 3-1: Subband (6 PRB) CQI, Wideband PMI | |
6 ms delay and 10ms interval for CQI and PMI | |
CoMP reporting threshold | TX-points having RS received power inside 6dB window |
Max. CoMP measurement set size | 2 TX-points |
Reference symbol overhead | DM-RS: 12 RE PRB for 1-2 orthogonal |
DM-RS ports CSI-RS: 2 RE/PRB per 10 ms | |
CRS: 2 CRS Rel8 legacy overhead | |
Control channel | Only overhead modelled: 3 OFDM symbols |
Scheduler algorithm | PF |
Interference modelling | Random rank and PMI in interfering Tx-points |
OLLA | Enabled, BLER target 10% |
HARQ | Max 4 retransmission, chase combining |