# Survey on Routing Protocols for Vehicular Ad Hoc Networks Based on Multimetrics
## 4 Routing-Protocol Proposals Based on Metrics
### Multimetric-Routing Proposals
#### 4.2.24 Distance and Signal Quality Aware Routing (DSQR)
\begin{table}
\begin{tabular}{p{14.2 pt} p{14.2 pt} p{14.2 pt} p{14.2 pt} p{14.2 pt} p{14.2 pt} p{14.2 pt} p{14.2 pt}} \hline \hline
**Protocol** & **Year** & **Metrics Used** & **Area Evaluated** & **Carry and Forwarding** & **Simulators for Evaluation** & **Delay** & **Delivery Ratio** \\ \hline \hline \multirow{4}{*}{\begin{tabular}{} \end{tabular} } & \multicolumn{3}{c}{Link lifetime \\  & & (\(9n+3\)), mobility & & OpenStreetMap & 0.35 s \\  & & (\(9n+21\)), node & & (OSM) [49], & (250 nodes): & 78\% \\  & & status (3n), and node & & SUMO [50], & 1 s & 1 s \\  & & density (\(n\)). & & (NETT) [51] & (50 nodes) & \\  & & **Total (\(\Omega n+2\))** & & & & \\ \hline \hline \multirow{4}{*}{\begin{tabular}{} \end{tabular} } & \multicolumn{3}{c}{Sped (\(2n+2\)), } & \multirow{4}{*}{Urban} & \multirow{4}{*}{no} & \multirow{4}{*}{SUMO [50], NS-2 [52]} & \multirow{4}{*}{66\%} \\  & & & & & & \\  & & (\(2n+2\)), and link & & & NS-2 [52] & (55 nodes) & \\  & & quality between & & & & \\  & & vehicles & & & & \\  & & (\(2n+2\)). & & & & & \\ \hline AODV with multi-REP (AODV-MR) [27] & 2014 & Link reliability and number of hops. & Urban & yes & SUMO [50], NS-2 [52] & 0.6 s (50 nodes) & 80\% \\ \hline \hline \multirow{2}{*}{\begin{tabular}{} \end{tabular} } & \multicolumn{3}{c}{Distance (TXC) (\(3n\)), number } & \multirow{4}{*}{no} & \multirow{4}{*}{SUMO [50], NS-3 [53]} & \multirow{4}{*}{2.04 s (500 nodes)} & \multirow{4}{*}{78\%} \\  & & & & & & \\  & & hops (\(n\)) and density (\(n\)). & & & NS-3 [53] & (50 nodes) & \\  & & **Total (\(\Omega n\))** & & & & \\ \hline \hline \multirow{4}{*}{\begin{tabular}{} \end{tabular} } & \multicolumn{3}{c}{Link availability (\(n\)), distances (\(6n\))} & \multirow{4}{*}{no} & \multirow{4}{*}{NS-2 [52]} & \multirow{4}{*}{-} & \multirow{4}{*}{-} \\  & & & & & & \\  & Data Dissemination & 2012 & and Packets & & & & \\  & Scheme & Reception Rate & & & & \\  & & PRR (\(2n\)). & & & & \\  & & **Total (\(\Omega n\))** & & & & \\ \hline \hline \multirow{4}{*}{\
\begin{tabular}{} \end{tabular} } & \multicolumn{3}{c}{Distance (\(7n\)), } & \multirow{4}{*}{Unbran} & \multirow{4}{*}{no} & \multirow{4}{*}{NS-2 [52]} & \multirow{4}{*}{-} & \multirow{4}{*}{-} \\  & & moving direction & & & & \\  & & (\(2n\)), velocity & & & & \\  & Routing & & and neighbors’ & & & \\  & & density (\(3n\)), & & & & \\  & & **Total (\(18n\))** & & & & \\ \hline \hline \multirow{4}{*}{
\begin{tabular}{} \end{tabular} } & \multicolumn{3}{c}{Distance (\(27n\)), } & \multirow{4}{*}{USM [49]} & \multirow{4}{*}{1.4 s} & \multirow{4}{*}{40\%} \\  & & & & & & \\  & & trajectory (\(26n\)), & & & & \\  & & available & & & & \\ \cline{1-1} \cline{3-4} Map-aware Routing Protocol & 2017 & bandwidth & Urban & & & \\  & & estimation (ABE) & & & & \\  & & (\(7n\)) and MAC & & & & \\  & & layer losses (\(n\)). & & & & \\  & & **Total (\(62n\))** & & & & \\ \hline \hline \end{tabular}
\end{table} 
Table 5: Multimetric routing protocols in a vehicular ad hoc network (VANET). Number of operations shown with each metric was approximated and based on number of neighbors \(n\), which does not consider any other phase, such as protocol initialization or generation overhead.