AN SDN TESTBED FOR EVALUATING WIRELESS HETEROGENEOUS NETWORKS

摘要

This paper presents a proof-of-concept hybrid testbed based on Software-defined networking (SDN) for wireless heterogeneous networks (HetNets) which can be helpful for researchers to assess algorithms and protocols at a large-scale. This prototype uses open source state-of-the-art OpenDaylight controller based on SDN to control simulated OpenFlow switches and Network Simulator NS3 running network topology supporting LTE and WLAN technologies. The proposed testbed can be useful to renovate the HetNets, a feature provided by SDN, given the escalating demand of reliable bandwidth-intensive broadcast services. Targeting multiple radio access technologies (multi-RAT) users, we install Open vSwitch (OVS) on end user devices and use real TCP/IP protocol stack in Linux kernel to generate accurate results. We integrate our testbed to a VLC media server that allows to stream multimedia packets over simulated network and deploy a few use cases over configurable testbed to validate the functionality of our testbed in practice.