**5. Conclusions**

In this chapter we proposed SDNMS-PAI for the E2E resource allocation i.e., service classes allocation for the E2E service requests. As the distributed management and tight coupling of control and data planes limit the control and global view of network resources. Moreover, the E2E resources in heterogeneous networks cannot be provisioned. Hence, in this chapter we proposed the hierarchical SDN architecture because a single controller with manual configuration of the control plane led to failure and restricts the optimal policy. Moreover, we provided a use case example with service requests and service classes. Furthermore, the SDNMS-PAI scheme employed in a hierarchical SDN architecture with AI agent in the global control plane overcomes the SDN-NAI in terms of E2E delay, jitter, PLR, and DC ratio.
