## 4 The IEEE 802.15.5 WPAN Mesh Standard
\begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline
**Feature** & **Zigbee* Pro [11]** & **6 LoWPAN [13]/ RPL [14]** & **IPS00* solution [15]** & **IEEE802.15.4e7 th** & **WirelessHART* [16]** & **ISAYM** & **IEEE** \\  & & & & **solution [15]** & **[18]** & **[16]** & **SP100.11a [17]** & **802.15.55**m [19]** \\ \hline \multirow{4}{*}{**Addressing Scheme**} & \multirow{4}{*}{16-bit or 64-bit} & \multirow{4}{*}{128-bit} & \multirow{4}{*}{16-bit or 64-bit} & \multirow{4}{*}{128-bit for 64-bit} & \multirow{4}{*}{16-bit or 64-bit} & \multirow{4}{*}{16-bit or 64-bit} \\  & & & & & & 128-bit for \\  & & & & & external IP-based & & \\  & & & & communications & & & \\ \hline
**Interoperability with other 802.15.4-based** & Yes & Yes & Yes & No & No & Yes \\
**technologies** & & & & & & & \\ \hline
**Routing** & Yes. Reactive & Yes. Tree-based & Unknown (lack of an available & Not Applicable & Based on a & Based on a & Yes. Decisions based on & tables formed by \\
**Protocol** & protocol (AODV) & (RPL) & of an available & (N/A) & Network Manager & Network Manager & mandatory functions 2 \\  & & & standard) & (central node) & (central node) & and 3 (See Section 3) \\ \hline \multirow{4}{*}{**Scalability**} & Poor. Due to the & Unknown. Lack & Unknown. Lack & Unknown. Lack & & & \\  & AODV protocol & of studies & of studies & complete & Good & Good & Good \\ \hline \multirow{4}{*}{**Robustness**} & Medium & Low & Unknown & Medium & Medium & Medium & Medium \\  & Positive: High path & Negative: No & & Positive: & Positive: & Positive: & Positive: Path \\  & redundancy & support against & & Mechanisms to & Mechanisms to & Mechanisms to & redundancy \\  & Negative: no support & interferences and & & protect against & protect against & protect against & Negative: No support \\  & against interferences & lack of path & interferences & interferences & interferences & interferences & against interferences \\  & & redundancy due to & & Negative: Poor & Negative: the use & Negative: Use of & \\  & & tree-based routing & & network adaptation & of Network & Network Manager, & \\  & & & to topology & Manager, Poor & Poor network & \\  & & & changes & network adaptation & adaptation to & \\  & & & & to topology & topology changes & \\ \hline \hline \end{tabular}
\end{table} 
Table 1: _Cont._  
\begin{table}
\begin{tabular}{c c c c c c c c c} \hline \hline \multirow{2}{*}{**Feature**} & \multirow{2}{*}{**Zigbee\({}^{\text{\text{\text{\text{\text{\text{\text{\text{\text{\text{\text{\text{\text{\text{\text{\text{\text{\text{\text{ \text{ \text{\text{\text{ }}}}}}}}}}}}}}}\)**} & **Fe** & **6 LoWPAN [13]/ RPL** & **IP500\({}^{\text{\text{\text{\text{\text{\text{\text{\text{\text{\text{\text{{\text{\text{{\text{\text{ \text{\text{\text{ \text{ \text{ \text{       }}}}}}}}}}}}}}\)** & **IEEE802.15.4e\({}^{\text{\text{\text{\text{\text{\text{\text{\text{\text{{\text{{\text{{\text{{ \text{\text{\text{{\text{\text{ \text{  \text{   {           }}}}}}}}}}}}}}\)** & **WirelessHART\({}^{\text{\text{\text{\text{\text{\text{\text{\text{\text{{\text{\text{{\text{\text{{ \text{{\text{ \text{{ \text{ {     \text{{          }}}}}}}}}}}}}}\)** & **ISA\({}^{\text{\text{\text{\text{\text{\text{\text{\text{{\text{\text{\text{{\text{ \text{{\text{\text{{\text{{ \text{   \text{{    \text{ {       \text{{       }}}}}}}}}}}}}\) & **SiP100.11a [17] & **802.15.5**\({}^{\text{\text{\text{\text{\text{\text{{\text{\text{{\text{\text{{\text{{\text{\text{{ \text{{ \text{ \text{ {  \texttexttext { {    \texttext{{       \text{{       }}}}}}}}}}}}}\) & & & & \\ \hline \multirow{4}{**Link Reliability**} & Medium & Low & & & & & & \\  & Positive: Fast path reconfiguration faced to & Positive: Fast path reconfiguration faced to & & & & & & \\  & topology changes & & & & & & & \\  & Negative: Increase in the & & topology changes & & & & & \\  & overhead due to the route & Negative: Lack of path & & & & & & \\  & discovery process.