# Highest Cost First-Based QoS Mapping Scheme for Fiber Wireless Architecture
## 2 Related Work
The authors of Reference [28] suggested some suitable schemes (i.e., idle sense (IS) and Asymmetric Access Point (AAP)) to improve the performance of the FiWi network with the help of GPON downstream information. Table 1 shows different existing integrated fiber wireless architectures that have been proposed in the literature to achieve different QoS goals. \begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Proposed** & **Wireless Technology** & **PON Technology** & **Implementation Goal** & **Pros** & **Cons** \\ \hline WiMAX-EPON & WiMAX and IEEE & & Solve bandwidth fairness issue at virtual & & \\ Network (WEN) and & 802.16 & EPON & ONU and WiMAX STA & & \\ WE-DBA [17] & & & & & \\ Integration of EPON & & & & & \\ and WiMAX for PMC & WiMAX & EPON & To solve operational issues of fixed & & \\
[18] & & & & & \\ Integrated & & & & & \\ WiMAX-EPON & & & & & \\ networks and DBA & & & & & \\ \([19]\) & & & & & \\ The convergence of & & & & & \\ EPON and LTE [20] & LTE & EPON & LTE and EPON to solve the problem of & & \\ Fiber wireless sensor & & & & \\ network (Fi-WSN) [21] & IEEE 802.15.4 & EPON & Evaluate a QoS mapping for the Fi-WSNs & & Reduce high-priority & Low-priority traffic \\ The convergence of & & & & & traffic delay & starvation \\ XG-PON and LTE & LTE & XG-PON & Proposed optimized DRAs for converged & & \\ with DQBs [22] & & & & & \\ A control bridge for & & & & \\ Integration of CPON & WiMAX & XG-PON & To keep dynamic QoS specification for & & \\ with WiMAX [23] & & & & \\ QoS provisioning & & & & \\ scheme for LTE/EPON & LTE & EPON & The proposed plan improves the overall & & \\ \([24]\) & & & & flow of CBR traffic by 40\%. & \\ Integrated XGPON & & & & \\ with EDCA [25] & IEEE 802.11n & XGPON & Resource allocation in the integrated & & \\ Idle sense (IS) and & & & & \\ asymmetric AP for & IEEE 802.11b & GPON & Improve the fairness issue in wireless & & \\ FWi [28] & & & & \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Comparison of FiWi networks. The brief literature review above validates the argument that the integration of PON with various wireless access networks offers a promising solution for the broadband access technology in terms of higher gain in bandwidth capacity, less delay, and minimal cost of operation. However, the ITU-T compliant PON and the IEEE compliant Wi-Fi standards support different protocol architecture and have QOS compatibility problems. Some of the existing work has been done with QoS mapping and provisioning for independent and hybrid architectures of the integrated fiber wireless access network [17; 18; 23] to offer different services. Previous work failed to focus on the adequate quality of services for the fifth generation fiber wireless access network. In fact, it is a challenging task to meet the QoS requirements of the compact architecture; therefore, the suitable QoS mapping issue is still an open research area, particularly in a converged network. The present paper aims to design a QoS mapping architecture for the FiWi access network with the help of the highest cost first (HCF) algorithm and investigates delay-sensitive QoS services of integrated fiber wireless access networking, where the optical network unit (ONU) is directly connected to a wireless domain through a wireless access point (WAP) that assists wireless communication between subscribers and the network. Moreover, this paper also analyzes the fairness issue using DCF and EDCA of IEEE 802.11 ac along with multimedia traffic in the FiWi access network.