Multimedia Internet of Things: A Comprehensive Survey <s> 2) SDN BASED QoS-AWARE ROUTING <s> Abstract Large scale networks are still a major challenge for management, guarantee a good level of Quality of Service (QoS) and especially optimization (rational use of network resources). Multi-Protocol Label Switching (MPLS), mainly used in the backbone of Internet service providers, must meet these three major challenges. Software-Defined Network (SDN), is a paradigm that allows, through the principle of orchestration and layers abstraction, to manage large scale networks through specific protocols. This paper presents a new SDN-based architecture for managing an MPLS Traffic Engineering Diffserv Aware (DS-TE) network. The architecture manages the QoS and routing with QoS constraints, following a new smart and dynamic model of allocation of the bandwidth (Smart Alloc). The proposed architecture is suitable for SDN equipment and especially the legacy equipment. We tested our architecture by simulation on a hybrid network made up of SDN equipment and another legacy. The results of the simulation showed that thanks to our architecture we can not only efficiently manage hybrid architectures but also achieve good QoS levels for convergent traffic. The performance evaluation was performed on VoIP, video, HTTP, and ICMP traffic increasing packet load. <s> BIB001 </s> Multimedia Internet of Things: A Comprehensive Survey <s> 2) SDN BASED QoS-AWARE ROUTING <s> In this paper, we propose a traffic-aware quality-of-service (QoS) routing scheme in software-defined internet of things (SDIoT) network. The proposed scheme exploits the unique features of software-defined networking (SDN), such as flow-based nature, and network flexibility, in order to fulfill QoS requirements of each flow in the network. We consider two types of QoS routing strategies — delay-sensitive and loss-sensitive — for incoming packets from end-devices in the network. The former is devised to deal with delay-sensitive flows, and the latter deals with loss-sensitive flows, in order to maximize the overall network performance. We propose a greedy approach based on Yen's K-shortest paths algorithm to compute the optimal forwarding path, while considering the QoS requirements of each packet. Consequently, the SDN controller deploys adequate flow-rules at the forwarding devices in the network. Extensive simulation results show that the proposed scheme significantly reduces the end-to-end delay and the percentage of flows which violate QoS constraints compared to the benchmarks considered in the study. In particular, the proposed scheme achieves 13%, 14% and 15% (with AttMpls topology) and 38%, 37% and 39% (with Goodnet topology) reduction in QoS violated flows as compared to the LARAC, SPD, and MRC schemes, respectively. <s> BIB002
Bahnasse et al. in BIB001 devised QoS-aware SDN based smart and dynamic model to allocate bandwidth (Smart Alloc) for MPLS Traffic Engineering DiffServ Aware (DS-TE) network. The proposed architecture translates the QoS requirements of an application into commands that indicates bandwidth and priority requirements. The SLA of each application is detected in terms of delay, loss rate, jitter, HTTP load time, and TCP session delay, and threshold values are set. Smart-alloc adaptively allocates the bandwidth according to the status of SLA. Sway, an SDN based QoS-aware routing protocol for delay-sensitive and loss-sensitive application, is presented in BIB002 . Sway exploits Yen's K-shortest path algorithm to compute traffic-aware (delay-sensitive or losssensitive) best routing path while considering QoS requirements for each packet. Multi-constrained QoS metrics are considered that are the delay, packet loss probability, and bandwidth. Integer linear programming is utilized to solve a multi-constrained QoS-aware route.