## 5 Comparison of MAC Protocols for IBSN
\begin{table}
\begin{tabular}{l c c c c c c c} \hline \hline  & & \multicolumn{6}{c}{**Features**} \\ \cline{2-9}
**MAC Protocol** & \begin{tabular}{c} **Energy-** \\ **Efficiency** \\ \end{tabular} & **Reliability** & **Overhead** & \begin{tabular}{c} **Effective-** \\ **Throughput** \\ \end{tabular} & \begin{tabular}{c} **Low-** \\ **Latency** \\ \end{tabular} & \
\begin{tabular}{c} **Hardware** \\ **Complexity** \\ \end{tabular} &
\begin{tabular}{c} **Access** \\ **Mechanism** \\ \end{tabular} \\ \hline CF-MAC [32] & \(+\) & \(+\) & \(+\) & \(-\) & \(+\) & \(+\) & TDMA \\ V-2005 & \(+\) & \(-\) & \(O\) & \(-\) & \(+\) & \(+\) & TDMA \\ SSD-TDMA [33] & \(-\) & \(-\) & \(+\) & \(+\) & \(+\) & TDMA \\ V-2005 & \(+\) & \(-\) & \(-\) & \(+\) & \(+\) & TDMA \\ DQSAN MAC [47] & \(-\) & \(-\) & \(+\) & \(+\) & \(-\) & \(O\) & TDMA \\ V-2009 & \(-\) & \(-\) & \(+\) & \(+\) & \(-\) & \(O\) & TDMA \\ HEH-MAC [34] & \(-\) & \(-\) & \(-\) & \(-\) & \(-\) & \(O\) & Hybrid ALOHA \\ V-2007 & \(-\) & \(-\) & \(-\) & \(-\) & \(-\) & \(-\) & \(-\) \\ VD-MAC [48] & \(-\) & \(+\) & \(-\) & \(+\) & \(-\) & \(-\) & \(-\) \\ V-2010 & \(-\) & \(+\) & \(-\) & \(+\) & \(-\) & \(+\) & TDMA + CSMA \\ X-MAC [42] & \(-\) & \(-\) & \(+\) & \(-\) & \(+\) & \(+\) & CSMA \\ V-2006 & \(-\) & \(+\) & \(-\) & \(+\) & \(-\) & \(-\) & \(-\) \\ V-MAC [46] & \(-\) & \(+\) & \(-\) & \(+\) & \(-\) & \(-\) & TDMA + CSMA \\ V-2008 & \(+\) & \(-\) & \(+\) & \(-\) & \(-\) & \(-\) & \(-\) \\ R-MAC [48] & \(-\) & \(+\) & \(-\) & \(-\) & \(-\) & \(-\) & TDMA + CSMA \\ V-2007 & \(+\) & \(-\) & \(+\) & \(+\) & \(-\) & \(-\) & TDMA + CSMA \\ V-MAC [45] & \(-\) & \(-\) & \(-\) & \(+\) & \(-\) & \(-\) & TDMA + CSMA \\ V-2006 & \(+\) & \(-\) & \(-\) & \(-\) & \(+\) & \(-\) & TDMA + CSMA \\ MEB-MAC [44] & \(-\) & \(+\) & \(-\) & \(+\) & \(-\) & TDMA + CSMA \\ V-2013 & \(-\) & \(+\) & \(-\) & \(-\) & \(+\) & \(-\) & TDMA + CSMA \\ FE-MAC [51] & \(-\) & \(+\) & \(-\) & \(+\) & \(+\) & \(-\) & TDMA + CSMA \\ V-2007 & \(+\) & \(-\) & \(+\) & \(+\) & \(+\) & \(-\) & TDMA + CSMA \\ V-MAC [72] & \(-\) & \(+\) & \(+\) & \(+\) & \(+\) & \(-\) & TDMA + CSMA \\ V-2013 & \(+\) & \(-\) & \(+\) & \(+\) & \(+\) & \(-\) & TDMA + CSMA \\ CA-MAC [57] & \(-\) & \(+\) & \(-\) & \(-\) & \(-\) & \(-\) & TDMA + CSMA \\ V-2009 & \(-\) & \(+\) & \(-\) & \(-\) & \(-\) & \(-\) & TDMA + CSMA \\ ULP-MAC [99] & \(-\) & \(+\) & \(-\) & \(-\) & \(-\) & \(-\) & TDMA + CSMA \\ V-2005 & \(+\) & \(+\) & \(-\) & \(+\) & \(-\) & \(-\) & TDMA + CSMA \\ BMC [40] & \(-\) & \(+\) & \(+\) & \(-\) & \(+\) & \(-\) & CSMA \\ V-2007 & \(-\) & \(+\) & \(-\) & \(-\) & \(-\) & TDMA + CSMA \\ V-2007 & \(-\) & \(+\) & \(+\) & \(-\) & \(-\) & \(-\) & TDMA + CSMA \\ V-2008 & \(-\) & \(+\) & \(+\) & \(-\) & \(-\) & \(-\) & TDMA + CSMA \\ V-2007 & \(+\) & \(O\) & \(+\) & \(-\) & \(+\) & \(-\) & TDMA + CSMA \\ S-MAC [25] & \(-\) & \(+\) & \(+\) & \(-\) & \(+\) & \(-\) & TDMA + CSMA \\ V-2002 & \(-\) & \(+\) & \(+\) & \(-\) & \(+\) & \(-\) & TDMA + CSMA \\ Cooperative—MAC [74] & \(+\) & \(+\) & \(-\) & \(+\) & \(-\) & \(-\) & TDMA + PDMA \\ V-2008 & \(+\) & \(-\) & \(+\) & \(+\) & \(-\) & \(+\) & TDMA + PDMA \\ Hybrid-MAC [56] & \(-\) & \(+\) & \(+\) & \(-\) & \(-\) & \(-\) & \(-\) \\ V-2012 & \(+\) & \(-\) & \(+\) & \(-\) & \(-\) & \(-\) & \(-\) \\ HUA-MAC [57] & \(-\) & \(+\) & \(-\) & \(-\) & \(-\) & \(-\) & \(-\) \\ V-2010 & \(+\) & \(+\) & \(-\) & \(-\) & \(-\) & \(-\) & \(-\) \\ V-2013 & \(+\) & \(-\) & \(+\) & \(-\) & \(-\) & \(-\) & \(-\) \\ \hline \hline \end{tabular}
\end{table} 
Table 11: Comparision of MAC protocols. Legends: \({}^{\prime}+^{\prime}=\) Positive; \({}^{\prime}-^{\prime}=\) Negative; \({}^{\prime}O^{\prime}=\) Neutral. Reliability is the successful data transfer from the transmitting node to the receiving node. (\(+\)) for reliability indicates that the MAC protocol was designed to deliver reliability even in a dynamic physical medium, such as the human body environment, where the link quality is highly deteriorated both temporally and spatially.