From: Data aggregation of mobile M2M traffic in relay enhanced LTE-A networks
Parameters | Values |
---|---|
Simulation length | 1000 s |
Donor eNBs (DeNBs) | 7 eNBs with hexagonal coverage. |
500 m inter-eNB distance. | |
Transmission power per PRB=26 dBm | |
Min. DeNB - UE distance | 35 m |
Terminal power | Maximum terminal power = 23 dBm |
(regular UE and M2M device). | |
Terminal speed | 5 km/h (UEs) |
TTI | 1 ms |
Mobility model | Random way point (RWP) |
Frequency reuse factor | 1 |
Transmission bandwidth | 5 MHz |
No. of PRBs | 25 |
MCS | QPSK, 16QAM, 64QAM, |
Channel models | Path loss: 128.1+37.6l o g 10(R), R in km, |
Slow fading: Log-normal shadowing, | |
correlation 1, deviation 8 dB, | |
Fast fading: 3GPP Pedestrian A. | |
RN parameters | |
PRBs for RN | 5 PRBs are allocated to RN by DeNB |
to evaluate PRB utilization. | |
Corresponding MCS | 16 |
TBS capacity | 1608 bits against MCS 16 and PRBs 5. |
available service rate T B S− o v e r h e a d (bits/TTI), | |
1608 (T B S)−352 (o v e r h e a d)=1256 bits/TTI | |
M2M packet size | RN Uu PHY receives 262.4 bits per TTI. |
RN Un PHY receives 656 bits per TTI. | |
Simulated scenarios | No multiplexing, |
multiplexing without timer, and | |
multiplexing with timer | |
Timer expiry values | 9 ms |
Timer expiry values | 4, 9, and 14 ms |
for subsection 6.3 | |
Type of RN | Fixed |
Video traffic model | |
Size (frame) | 1200 Bytes |
Time (between frames) | 75 ms |
M2M traffic model [35]. | |
Message size | 38 bytes at the device PDCP |
Inter-send time | 1 s |