Abstract
Traditionally, mobile ad hoc networks (MANET) and hybrid optical-wireless networks, also known as fiber-wireless (FiWi), have been considered disjointly and independently, with no synergic management solutions. The former has primarily focused on dispatching packets among mobile nodes in infrastructure-less and very dynamic environments, the latter on offering high-bandwidth and low-latency access to cellular-equipped mobile nodes. The recent advancements and penetration of software-defined networking (SDN) techniques have stimulated the adoption of SDN-based flexible monitoring and control also for the MANET and FiWi domains. In this perspective, the paper originally proposes a model and an architecture that loosely federate MANET and FiWi domains based on the interaction of MANET and FiWi controllers: the primary idea is that our MANET and FiWi federated controllers can seldom exchange monitoring data and control hints the one with the other, thus mutually enhancing their capability of packet management over hybrid FiWi-MANET networks. Our model is applied to several relevant use cases to practically point out the benefits of the proposal in terms of both load balancing and fairness improvements.
Highlights
To increase the quality of service (QoS) perceived by mobile users, many industrial and academic research activities are pushing for two primary goals: high performance and dynamic management
By originally considering software-defined networking (SDN) techniques plus hybrid FiWi-mobile ad hoc networks (MANET) networks, this paper proposes a novel model to maximizing the QoS perceived by final users in terms of load balancing and fairness, by considering the state and requirements of both FiWi and MANET domains and by managing/controlling them
3 Background on FiWi and MANET As already stated, this paper originally focuses on the challenging issues raised by the integration of hybrid FiWi and MANETs through federated SDN controllers
Summary
To increase the quality of service (QoS) perceived by mobile users, many industrial and academic research activities are pushing for two primary goals: high performance and dynamic management. The proposed model is based on distributed and different MANET and FiWi SDN controllers The former appropriately reroutes packets among mobile nodes by considering the current MANET state, application requirements, and the access network load advertised by the FiWi SDN controller. The SDN approach has been proposed in scenarios differing from traditional datacenters, such as MANETs [13, 14], vehicular networks [15], naval systems [16], and access/transport networks [6, 10, 17] Based on these considerations and with the main purpose of providing a wider point of view of the state-of-theart, we propose to model the literature along four primary directions: location distribution, controller integration, management openness, and domain heterogeneity. Based on the four directions above, it is possible to identify some primary research activity directions (see Table 1): Single datacenter: this is the simplest case where a single datacenter is managed in an SDN-based approach to optimize the intra-datacenter traffic, either by adopting a single centralized SDN controller or multiple SDN controllers; Multiple datacenters with a single centralized controller: in this case, there are multiple datacenters in different locations, typically managed
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