# Mathematical Models for Named Data Networking Producer Mobility Techniques: A Review
## 3 Recent Mobility Techniques
### Anchorless Technique
\begin{table}
\begin{tabular}{c c c c c c c} \hline \hline \multirow{2}{*}{**Hybrid Classification**} & \multicolumn{2}{c}{**Simulation Tools**} & \multirow{2}{*}{**Technique**} & \multirow{2}{*}{**Ref**} & \multirow{2}{*}{**Method**} & \multirow{2}{*}{**Future**} \\  & & **(Mathematical/** & **Experiment)** & & & **Advantage** \\ \hline \multirow{8}{*}{Feature} & Routing & Experiment & Anchor and & [107] & proactive and & Enhance name \\  & \multirow{2}{*}{Routing based} & Experiment & Anchor and & reactive routing & & prefix advertising \\ \cline{2-6}  & Experiment & Anchor and & [22] & CRoS-NDN & Improve routing \\  & & anchorless & & & effectiveness \\ \cline{2-6}  & Caching based & Mathematical & Anchorless and & [108] & NDNiot-FC & Enhance caching strategy \\  & & rendervous & & & & strategy \\ \cline{2-6}  & \multirow{2}{*}{Naming based} & Mathematical & Anchor and & [109] & Hybrid naming & Enables faster \\  & & anchorless & & on IoT & & IoT connections \\ \cline{2-6}  & \multirow{2}{*}{Mathematical} & Anchor and & [110] & Naming Scheme & \begin{tabular}{c} Name lookup \\ functionality in \\ NDN \\ \end{tabular} \\ \hline \multirow{8}{*}{Security} & Encryption & Experiment & Anchorless and & [111] & \begin{tabular}{c} Rivest Sharmir \\ Adleman \\ encryption \\ \end{tabular} & \begin{tabular}{c} Secure data \\ precision and key \\ update frequency \\ \end{tabular} \\  & \multirow{2}{*}{Experiment} & Anchorless and & [112] & \begin{tabular}{c} Hybrid \\ Encryption-based \\ Access Control \\ Schemes \\ \end{tabular} & Increase interest \\  & & & & Schemes & and privacy \\ \cline{2-6}  & Signature based & Experiment & Anchorless and & [113] & \
\begin{tabular}{c} Certificateless \\ Signature Scheme \\ \end{tabular} &
\begin{tabular}{c} Preservation of \\ the NDN IoT \\ network \\ \end{tabular} \\ \hline \hline \end{tabular}
\end{table} 
Table 8: _Cont._ \begin{table}
\begin{tabular}{c c c} \hline \hline \multicolumn{2}{c}{**Challenge/Limitation/Network**} & \multirow{2}{*}{**Description**} & \multirow{2}{*}{**Impact on Network Optimization**} \\
**Types/Mobility and Content** & & & \\
**Request Challenge** & & & \\ \hline \multirow{8}{*}{Transition and Coexistence} & The implementation of NDN necessitates & & \\  & a shift from the current TCP/IP & Possible disruptions and compatibility \\  & framework. The process of migrating & problems may arise during the period of \\  & while maintaining old networks can be & changeover. \\  & & intricate and demanding. & \\ \hline \multirow{8}{*}{Addressing Complexity} & Although content-based naming is & & \\  & advantageous, managing and & & \\  & guaranteeing unique, significant, and & & content naming rules could result in \\  & scalable content names can be difficult, & & \\  & particularly in extensive & implementations. & & \\ \hline \multirow{8}{*}{Security Concerns} & NDN incorporates security measures, but & & \\  & ongoing attention and study are required & & \\  & to address difficulties related to key & & \\  & management, safe routing, and protection & & \\  & against different types of assaults. & & \\ \hline \multirow{8}{*}{Scalability} & As the network expands, particularly in & & \\  & extensive and ever-changing settings, the & & \\ \cline{1-1}  & scalability of NDN’s forwarding and & & \\ \cline{1-1}  & routing techniques may encounter & & \\ \cline{1-1}  & & & \\ \hline \multirow{8}{*}{QoS Assurance} & Maintaining a consistent QoS might & & \\ \cline{1-1}  & require some work. Content-based & & \\ \cline{1-1}  & routing does not guarantee achieving the & & \\ \cline{1-1}  & desired QoS levels, resulting in & & \\ \cline{1-1}  & fluctuations in the quality of service. & & \\ \hline \hline \end{tabular}
\end{table} 
Table 9: Potential Challenges and Limitations of NDN in Network Optimization.