## 1 Introduction
\begin{table}
\begin{tabular}{c c c c c c c c c} \hline \hline
**Surveys** & **FoA** & **DRF** & **PCA** & **CAN** & **FDT** & **NoR** & **CNI** & **Rk** \\ \hline [PERSON] et al. [82] & & & & & & & & Classical and swarm-intelligence & 5 & Hg \\
2012 & & ✓ & ✓ & ✓ & & ✓ & & Energy-efficient and QG5-aware & 5 & Hg \\ \hline [PERSON] et al. [38], & & & & & & & routing approaches in WMSNs & 5 & Hg \\
2012 & & ✓ & ✓ & ✓ & & ✓ & & 3 & Md \\ \hline [PERSON] et al. [83], & & & & & & & & \\
2013 & & ✓ & ✓ & & ✓ & & 3 & Md \\ \hline [PERSON] et al. [84], & ✓ & ✓ & & & ✓ & & 3 & Md \\
2013 & & ✓ & ✓ & & & & & \\ \hline [PERSON] et al. [85], & ✓ & & ✓ & & & & 2 & Lw \\
2013 & & ✓ & ✓ & ✓ & & & & In-depth analysis of LEACH-based & 5 & Hg \\ \hline [PERSON] et al. [87], & & & & & & & & \\
2013 & & ✓ & & ✓ & ✓ & & 3 & Md \\ \hline [PERSON] et al. [39], & & & & & & & Taxonomy based on network & 4 & Md \\
2013 & & ✓ & ✓ & ✓ & & & structure, communication model, & \\  & & & & & & topology and reliable routing & & \\ \hline [PERSON] et al. [88], & & ✓ & ✓ & & & & 2 & Lw \\
2013 & & ✓ & ✓ & & & & & \\ \hline [PERSON] et al. [37], & & ✓ & ✓ & & & & 2 & Lw \\
2013 & & & ✓ & ✓ & & & & \\ \hline [PERSON] et al. [99], & & & & & & & Distributed Hash Table (DHT) ori- & & \\
2013 & ✓ & ✓ & ✓ & ✓ & ✓ & & & end routing and data-management & 5 & Hg \\ \hline [PERSON] et al. [90], & & ✓ & ✓ & & & & & \\
2013 & & ✓ & ✓ & & & & & \\ \hline [PERSON] et al. [91], & & & ✓ & ✓ & & & Location-based routing in WSNs & 3 & Md \\
2014 & & ✓ & ✓ & ✓ & ✓ & Mobile sink based routing in WSNs & 5 & Hg \\ \hline [PERSON] et al. [44], & & & & & & & Mobile sink based state-of-the-art & 5 & Hg \\
2014 & & ✓ & ✓ & ✓ & ✓ & & routing techniques in WSNs & 5 & Hg \\ \hline [PERSON] et al. [92], & ✓ & & ✓ & & & Intelligent energy-efficient routing & 3 & Md \\
2014 & & & & & & & in WSNs & 5 & Hg \\ \hline [PERSON] et al. [40], & ✓ & ✓ & ✓ & ✓ & & & State-of-the-art secure routing & 5 & Hg \\
2014 & & & & & & & techniques in WSNs & 5 & Hg \\ \hline [PERSON] et al. [93], 2014 & ✓ & ✓ & ✓ & ✓ & ✓ & & Energy-aware non-swarm and & & \\  & & & & & & swarm-intelligence based routing & 5 & Hg \\ \hline [PERSON] et al. [94], & & & & & & & & Taxonomy of mobility based WSNs & 5 & Hg \\
2014 & ✓ & ✓ & ✓ & ✓ & ✓ & & & \\  & & & & & & routing protocols & 5 & Hg \\ \hline [PERSON] et al. [95], & & & & & & & & & 3 & Md \\
2015 & ✓ & ✓ & ✓ & & & & & \\ \hline [PERSON] et al. [96], & & & & & & & Categorize secure-multipath routing & & \\  & & & & & & & protocols based on defense against & 4 & Md \\
2015 & & ✓ & ✓ & ✓ & & & & \\ \hline [PERSON] et al. [97], & & & ✓ & ✓ & ✓ & & 3 & Md \\
2015 & & ✓ & ✓ & ✓ & & & & \\ \hline [PERSON] et al. [98], & & ✓ & ✓ & ✓ & & & & 3 & Md \\
2015 & & ✓ & ✓ & ✓ & ✓ & & Evaluation of atypical hierarchical & 5 & Hg \\ \hline [PERSON] et al. [100], & & ✓ & ✓ & & & & Classification of biologically inspired & 3 & Md \\
2016 & & ✓ & ✓ & & & & algorithms in computer networks & 3 & Md \\ \hline [PERSON] et al. [101], & & & & & ✓ & & Opportunistic routing protocols & 3 & Md \\
2016 & & & & & & in WSNs & & \\ \hline \hline \end{tabular}
\end{table} 
Table 2: _Cont._As depicted in Figure 1, the rest of this paper is outlined as follows. In Section 2, the significance of survey is presented. The Section 3 discusses the novel general survey design framework under the perspective of survey design requirements. In Section 4, an original classification of already published routing surveys for WSNs is presented. The Section 5 put forths insights and future research directions. In Section 6, a comprehensible conclusion and summary is drawn on the basis of proposed research work.