Delay Reduction for Throughtput Optimal Back-Pressure Routing in Software Defined Network

Abstract

Software Defined Networking is an emerging phenomenon in networking horizon. Software defined networking splits control element and forwarding element of a network. Software Defined Networking (SDN) is having characteristics such as centralized management, improved automation APIs, programmability, more security, reliability and granularity. Therefore SDN is suitable for data center, cloud computing and carrier networks. Data center and campus networks requires reliable and fault tolerant topologies. One of the best example is multi-rooted tree. These designs inherently add multiple paths between two nodes. Routing data from multipath network is challenge in any type of network with throughput consideration. On the same line Back-pressure algorithm is a throughput optimal multipath routing and scheduling policy which uses all paths between source and destination but back-pressure algorithm exhibits higher delays and jitter. We can use centralized control and monitoring features of software defined networking for minimizing delays and jitter in multipath routing in data centers, campus networks and cloud systems.