You are presented with multiple paper abstracts, alongside the associated literature review and chapter titles. Given the provided information, you are going to do a literature review. Please generate a coherent literature review that synthesizes the content, draws connections between different works, highlights major findings, and identifies any gaps in the existing research.

Literature Review Title: Multimedia Internet of Things: A Comprehensive Survey 
Chapter Title:  2) SDN BASED QoS-AWARE ROUTING 
1. Abstract of Cited Paper (BIB001):  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.

Literature Review:
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.