A Novel Framework for Resource Discovery and Self-Configuration in Software Defined Wireless Mesh Networks

被引:8
作者
Babu, Sarath [1 ]
Mithun, P. V. [1 ]
Manoj, B. S. [1 ]
机构
[1] Indian Inst Space Sci & Technol, Dept Avion, Thiruvananthapuram 695547, Kerala, India
来源
IEEE TRANSACTIONS ON NETWORK AND SERVICE MANAGEMENT | 2020年 / 17卷 / 01期
关键词
Software; Switches; Wireless mesh networks; Delays; Wireless networks; Routing; Software defined networks; OpenFlow; OLSR; wireless mesh networks; mobility; resource discovery; controller handoff; CONTROLLER PLACEMENT;
D O I
10.1109/TNSM.2019.2922107
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
A novel framework is proposed for software defined wireless mesh networks involving mobile switches and controllers operating under in-band control in order to self-configure depending on the network dynamics. Besides the addition/removal of nodes (including switches and controllers) to/from the network in real-time, the problem becomes more challenging for switches to select an appropriate controller from multiple physical controllers. Therefore, first we design a resource discovery scheme to address the dynamic addition and removal of nodes with a software defined optimized link state routing (SD-OLSR) protocol. Apart from resource discovery, SD-OLSR captures the network dynamism and provides a global network view to the controller. Further, two controller handoff schemes, controller-initiated handoff (CIH) and switch-initiated handoff (SIH), are designed for switches to efficiently handover to a suitable controller. The framework and handoff schemes are tested using a software defined wireless mesh network testbed involving mobile switches and controllers operating under in-band control. The results show that SIH performs better in terms of SDN control overhead and PacketIn-FlowMod delay, while CIH outperforms SIH in terms of the number of handoffs and controller handoff time. A fair trade-off between the number of handoffs and the desired performance metric can be achieved by tuning the handoff threshold in both CIH and SIH schemes. As an added benefit, our framework provides better load sharing among the controllers in terms of flow-rule requests.
引用
收藏
页码:132 / 146
页数:15
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