# QoS Aware and Fault Tolerance Based Software-Defined Vehicular Networks Using Cloud-Fog Computing
## 4 Proposed Solution
### Qaft-SDVN Proposed Model
Similarly, compared with the latest model such as the QAFT-SDVN model, we reduced the task failure ratio by 20%, 15%, 23.3%, and 22.5% by using the fault tolerant technique, Fog technologies, and messages nature-based priority. In the future, we will work on the vehicle's mobility and connection with the different RSUs of vehicles. In the future, we will also need a security model for the proposed system. Conceptualization, S.A.S. ; Formal analysis, M.R., A.U. and A.W. ; Investigation, M.R. ; Methodology, S.A.S., S.H., F.A. and A.U. ; Project administration, S.A.S. ; Resources, A.W., M.Z. and C.V.-R.; Software, H.Z. ; Validation, M.R. ; Writing--original draft, A.U. ; Writing--review and editing, A.W. All authors have read and agreed to the published version of the manuscript. This work was supported by the School of Engineering and Sciences at Tecnologico de Monterrey. The authors declare no conflict of interest. ## References

* [PERSON] et al. (2012) [PERSON]; [PERSON]; [PERSON] Software-defined networking (SDN): A reference architecture and open APIs. In Proceedings of the IEEE 2012 International Conference on ICT Convergence (ICTC), Jeju Island, Korea, 15-17 October 2012; pp. 360-361. * [PERSON] et al. (2015) [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON] Software-defined networking: A comprehensive survey. _Proc. IEEE_**2015**, _103_, 14-76. [CrossRef]
* [PERSON] and [PERSON] (2014) [PERSON]; [PERSON] VANET routing protocols: Issues and challenges. In Proceedings of the 2014 Recent Advances in Engineering and Computational Sciences (RAECS), Chandigarh, India, 6-8 March 2014; pp. 1-5. * [PERSON] (2017) [PERSON] From vehicular Ad-hoc networks to internet of vehicles. In Proceedings of the NexComm 2017 Conference, Venice, Italy, 23-27 April 2017; pp. 23-27. * [PERSON] et al. (2017) [PERSON]; [PERSON]; [PERSON] Architectures for building secure vehicular networks based on SDN technology. _Autom. Control Comput. Sci._**2017**, _51_, 907-914. [CrossRef]
* [PERSON] et al. (2020) [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON] Complementing IoT services through software defined networking and edge computing: A comprehensive survey. _IEEE Commun. Surv. Tutor._**2020**, _22_, 1761-1804. [CrossRef]* [PERSON] and [PERSON] (2011) [PERSON]; [PERSON] _The NIST Definition of Cloud Computing_; National Institute of Standards and Technology: Gaithersburg, MD, USA, 2011. * [PERSON] et al. (2015) [PERSON]; [PERSON]; [PERSON]; [PERSON] Fog Computing: Platform and Applications. In Proceedings of the 2015 Third IEEE Workshop on Hot Topics in Web Systems and Technologies (HotWeb), Washington, DC, USA, 12-13 November 2015. * [PERSON] and [PERSON] (2017) [PERSON]; [PERSON]; [PERSON] Performance Evaluation of Network Aggregation Techniques in VANET. _IJIREICE_**2017**, \(5\), 36-39. * [PERSON] et al. (2020) [PERSON]; [PERSON]; [PERSON]; [PERSON] Effective wide spectrum sharing techniques relying on CR technology toward 5G: A survey. _J. Commun._**2020**, _15_, 122-147. [CrossRef]
* [PERSON] et al. (2020) [PERSON]; [PERSON]; [PERSON]; [PERSON] [PERSON] Dynamic Resource Allocation Model for Distribution Operations using SDN. _IEEE Internet Things J._**2020**, \(8\), 976-988. [CrossRef]
* [PERSON] et al. (2020) [PERSON]; [PERSON]; [PERSON] [PERSON]; [PERSON]; [PERSON] Towards Dynamic Controller Placement in Software Defined Vehicular Networks. _Sensors_**2020**, _20_, 1701. [CrossRef] [PubMed]
* [PERSON] et al. (2020) [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON] A trust model using edge nodes and a cuckoo filter for securing VANET under the NLoS condition. _Symmetry_**2020**, _12_, [PERSON]. [CrossRef]
* [PERSON] et al. (2019) [PERSON]; [PERSON]; [PERSON] Design and Prototyping of a Software Defined Vehicular Networking. _IEEE Trans. Veh. Technol._**2019**, _69_, [PERSON]. [CrossRef]
* [PERSON] et al. (2018) [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON] Real-time intersection-based segment aware routing algorithm for urban vehicular networks. _IEEE Trans.