Toward Adaptive and Scalable Topology in Distributed SDN Controller

SDN Controller for LTE Networks

LTE (Long Term Evolution) networks are capable of handling tremendous user loads with the current user base estimated to be in hundreds of millions. LTE is superior to older telecommunication networks, yet it suffers from issues like inflexible & expensive equipment, complex control plane protocols, coupling of control and data planes in devices and equipments and so on. It is therefore decided...

Scalable Programming for SDN Controllers

Introduction. A major recent development in computer networking is the notion of Software-Defined Networking (SDN), which allows a network to customize its behaviors through centralized policies at a conceptually centralized network controller. In particular, Openflow [4] has made significant progress by establishing (1) flow tables as a standard data-plane abstraction for distributed switches,...

Loose Management for Multi-controller in SDN

Robustness in the Graph Topology of a Common Adaptive Controller

For any m-input, m-output, finite-dimensional, linear, minimum-phase plant P with first Markov parameter having spectrum in the open right-half complex plane, it is well known that the adaptive output feedback control C, given by u = −ky, k̇ = ‖y‖, yields a closed-loop system [P,C] for which the state converges to zero, the signal k converges to a finite limit, and all other signals are of class...

SMaRtLight: A Practical Fault-Tolerant SDN Controller

The increase in the number of SDN-based deployments in production networks is triggering the need to consider fault-tolerant designs of controller architectures. Commercial SDN controller solutions incorporate fault tolerance, but there has been little discussion in the SDN literature on the design of such systems and the tradeoffs involved. To fill this gap, we present a by-construction design...