# Realistic Simulation for Body Area and Body-To-Body Networks
## 3 Proposed Simulator
### Deterministic (Bio-Mechanical) Radio Link and Mobility Modeling
#### 3.2.2 Intra-BAN and Inter-BAN Channel Models
\begin{table}
\begin{tabular}{c c c c c c c c c c} \hline \hline \multirow{2}{*}{**Link Type**} & \multirow{2}{*}{**Statistics**} & \multicolumn{2}{c}{**CM3-A**} & \multicolumn{2}{c}{**E-CM3-A**} & \multicolumn{2}{c}{**CM3-B**} & \multicolumn{2}{c}{**E-CM3-B**} \\ \cline{3-10}  & & **900 MHz** & **2450 MHz** & **900 MHz** & **2450 MHz** & **900 MHz** & **2450 MHz** & **900 MHz** & **2450 MHz** \\ \hline Right & Mean & 53.48 & 61.74 & 58.85 & 62.75 & 68.36 & 80.08 & 66.17 & 79.36 \\ Ankle-Left & Standard Deviation & 5.50 & 3.89 & 6.12 & 4.01 & 2.75 & 3.61 & 6.32 & 4.77 \\ Ankle & **Correlation Coefficient** & **0.06** & **0.06** & **0.25** & **0.13** & **0.05** & **0.06** & **0.78** & **0.39** \\ \hline Right & Mean & 51.67 & 60.80 & 52.48 & 61.30 & 62.62 & 79.01 & 63.50 & 78.32 \\ Knee-Left & Standard Deviation & 5.40 & 3.72 & 5.76 & 3.86 & 2.80 & 3.64 & 7.54 & 5.01 \\ Knee & **Correlation Coefficient** & **0.07** & **0.07** & **0.10** & **0.06** & **0.05** & **0.06** & **0.85** & **0.48** \\ \hline Left & Mean & 53.30 & 61.69 & 55.99 & 62.69 & 67.95 & 80.04 & 65.64 & 78.80 \\ Toe-Right & Standard Deviation & 5.23 & 3.66 & 6.16 & 4.00 & 2.75 & 3.59 & 7.69 & 5.72 \\ Toe & **Correlation Coefficient** & **0.06** & **0.06** & **0.28** & **0.12** & **0.06** & **0.07** & **0.83** & **0.56** \\ \hline \hline \end{tabular}
\end{table} 
Table 7: Statistical analysis of the IEEE 802.15.6 channel models and enhanced proposed channel models using the deterministic approach. Figure 12: Path loss comparison of CM3-B _versus_ enhanced CM3-B at 2450 MHz. (**a**) Pathloss of IEEE 802.15.6 standard CM3-B between (Ear and belt); (**b**) Pathloss of Enhanced IEEE 802.15.6 standard E-CM3-B between (Ear and belt). Regarding the correlation coefficient, the numbers of links were under observations during the simulations, in particular some other mobile links, such as \"_hands_\", or \"_wrists_\" _versus_\" _chest_\", \"_lowerback_\" and \"_lips_\". Most of these links provide less space variations as the movements of the hands or wrists are much less in comparison to the movements of one foot from another, and therefore, it is observed that these links provide (on average) a 5% to 15% difference in the correlation coefficients. Another important observation is that CM3-B/E-CM3-B (_i.e._, the exponential models) shows much higher correlation than the CM3-A/E-CM3-A (lognormal distributed models). One of the reasons is that the CM3-B model remains almost flat at distances higher than 0.35 m because of the dominating impact of multipath fading, whereas E-CM3-B keeps track of high mobility and temporal variation and, hence, provides much higher correlation coefficients. However, in the case of a radio link of type inter-BAN, _i.e._, the two nodes \(i\) and \(j\) are located on different BANs, the corresponding path loss is computed as [38]: \(PL(d_{ij})=G(d_{0})+10\times n\times log_{10}(d_{ij}/d_{0})+F\); where \(G(d_{0})\) is the channel gain at the reference distance, \(d_{0}\) is the reference distance, which is equal to 1 m, \(n\) is the path loss exponent factor and \(F\) is the fading. Typical values (validated experimentally) for these components are provided in [38].