Dynamic Wavelength and Bandwidth Allocation in Tactile-Capable Optical Cloud Distribution Networks

摘要

Cloud computing has been the killer technology for offering dynamically scalable infrastructure to modern Internet applications. However, cloud networks can be a burden for latency-sensitive applications such as Tactile Internet, which can't afford the high delay due to communication with remote cloud servers. In this paper, we exploit content distribution networks deployed by Internet service providers, and next-generation passive optical networks to construct agile, programmable and scalable Optical CLoud Distribution Networks (OCLDN). With OCLDN, a software defined networking (SDN)-based mini-cloud data center is installed at the central office, which includes a cloud-based tactile steering server, and supports all types of cloud applications. To meet the stringent quality-of-service (QoS) requirements for new and existing services, we propose a new Dynamic Wavelength and Bandwidth Allocation scheme, which employs the Water-Filling technique and advanced intra-ONU scheduling. Extensive simulations are performed; results highlight the effectiveness of the proposed scheme in supporting the new types of services without impairing the QoS demands for new and legacy data services.