The document summarizes the results of an LTE network simulation for different bandwidth configurations and site grid inter-site distances. It provides key simulation parameters including operating band, transmit power, antenna configuration, scheduling details, propagation model, and SNR curves. The main results are spectral efficiency figures in bps/Hz for various channel bandwidths from 1.4 to 20 MHz and site grid inter-site distances from 500m to 9000m. Some values were modified due to questions about simulator accuracy.

1. Simulation Report
Piotr Godziewski
Network Engineering LTE
23.09.2009
DL spectral efficiency figures for four representative site grids (different inter site distance)
and all available bandwidth configurations.
MoRSE [MoRSE-LTE-V3.2-02 / lte-v3.3_lte49_pf48_release64.exe]
Date: June/July 2009
Author: Piotr Godziewski
Parameter Value
Operating band 2100 MHz
Channel bandwidth 1.4, 3, 5, 10, 15, 20 MHz
TX power per PRB 0.8 W (for every bandwidth configuration)
Noise power per PRB -112.4 dBm (DL)
Antenna scheme Number of TX antennas = 1
Number of RX antennas = 2 (MRC)
Hexagonal layout ISD = 500, 1732, 3000, 9000 m
3-sector layout, 7 sites, 21 cells
CQI reporting Ideal CQI reporting
3 PRBs measurement window
CQI measurement 1 PRB (1.4 MHz),
bandwidth 2 PRBs (3, 5 MHz),
3 PRBs (10 MHz),
4 PRBs (15, 20 MHz)
Handover Based on path loss and slow fading
Scheduling Product specific implementation
(channel aware with Proportional Fairness)
#UE per TTI 1 (1.4 MHz),
3 (3 MHz),
7 (5 MHz),
10 (10 MHz),
20 (15, 20 MHz)
RBG size 1 (1.4 MHz),
(scheduling granularity) 2 (3, 5 MHz),
3 (10 MHz),
4 (15, 20 MHz)
MCS set QPSK: 1/3, 1/2, 2/3
16QAM: 1/2, 2/3, 5/6
64QAM: 2/3, 5/6, 9/10
Maximum number of 3
HARQ retransmissions
Link Adaptation BLER target = 10% after 1st transmission
Number of users 10 UEs per sector (210 UEs per area)
Service Full buffer
UE speed 3 km/h

2. Simulation Report
Piotr Godziewski
Network Engineering LTE
23.09.2009
L1 overhead According to 3GPP 36.211
Propagation
Model 3GPP TR 25.814 (macro cell)
Antenna Horizontal pattern only
2
θ
A(θ ) = − min 12 , Am
θ 3dB
θ 3dB = 70 degrees, Am = 20 dB
(acc. to 3GPP 25.814 Annex 1 Table A.2.1.1-3)
Antenna gain 14 dBi
Penetration loss 0 dB
Slow Fading = 8 dB
De-correlation length = 50 m
Link Level
SNR curves Source: 4GMax
Some of the obtained values have been questioned due to simulator accuracy (implementation
issues) therefore in few cases the reference spectral efficiency for 10MHz is used and
modified according to trend less resources worse performance. Figures subjected to
modification are marked below. The trend has been taken from Figure 9.22 of “LTE for
UMTS. OFDMA and SC-FDMA Based Radio Access” by HH/AT.
ISD Spectral efficiency [bps/Hz]
1.4 MHz 3 MHz 5 MHz 10 MHz 15 MHz 20 MHz
500m 0.77 1.03 1.15 1.19 1.21 1.22
1732m 0.72 0.97 1.08 1.11 1.14 1.15
3000m 0.71 0.87 0.88 0.98 0.98 0.98
9000m 0.54 0.58 0.58 0.67 0.71 0.80