Fiber-wireless (FiWi) access networks: Challenges and opportunities, Article. orig-research. Bibliometrics Data Bibliometrics. · Citation. This article highlights key enabling optical as well as wireless technologies and explains Fiber-wireless (FiWi) access networks: Challenges and opportunities. A plethora of enabling optical and wireless technologies have been emerging to build future-proof bimodal fiber-wireless (FiWi) broadband access networks. attention to the technical challenges and opportunities of FiWi networks, but also .
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Deep fiber access is a challenging mix of technology choices, business models, and regulatory issues. In this section, we highlight some of the recently proposed techniques to provide QoS continuity across the optical-wireless interface of FiWi access networks.
The optimal placement of ONUs is accesw important design objective of FiWi networks due to the fact anr the cost of laying optical fiber is significantly higher than that of devices attached to either end of the optical fiber, for example, OLT. OWI aims at integrating PONs and other optical fiber access technologies with broadband wireless access technologies, for example, Opportunitkes, in order to increase the capacity of wireless access networks and reduce access point complexity through centralized management [ 12 ].
Beside traffic-aware scheduling, backhaul sharing is gaining significant importance to enhance the performance of cellular networks overlaid with WiFi offloading hotspots [ 96 ]. The resultant peer-to-peer traffic can be routed either through chal,enges multihop wireless path within the wireless subnetwork or through the wireless-optical-wireless path, whereby traffic is first sent from mesh client via its associated mesh router to its closest ONU 1 and is then forwarded upstream to the OLT.
To solve this optimization problem, the authors applied a tabu search based heuristic, a widely used metaheuristic algorithm for solving combinatorial problems.
Recall from above that beside reliability, latency is a key requirement of not only smart grid communications but also LTE-A fiber backhaul infrastructures. Each receiving ONU determines to discard or forward the traffic according to the location fiiwi the destination mesh client.
The obtained measurements demonstrated that the MMSE precoding provides a large networ,s gain compared to conventional noncooperative precoding.
Wireless access networks, on the other hand, potentially go almost everywhere but provide a highly bandwidth-constrained transmission channel susceptible to a variety of impairments. Today, Internet technology and renewable energies are beginning to merge in Europe, North America, and other regions worldwide in order to create an interactive, integrated, and seamless Energy Internet infrastructure for the so-called Third Industrial Revolution TIR economy, which goes well beyond current austerity measures and has been officially endorsed by the European Commission as economic growth roadmap toward a competitive low carbon society by [ ], as discussed in more detail next.
This paper has citations. Extensive simulations were conducted to study the network throughput gain in FiWi networks under peer-to-peer traffic among wireless mesh clients and compare the achievable throughput gain to conventional WMNs without any optical backhaul. As shown in Figure fiber-witelesssuppose that wireless mesh client wants to communicate with mesh client. As recently explained by Perez in her excellent work on the implications of financial collapses [ 88 ], there have been four previous situations equivalent to the current crisis in the past two centuries since the first industrial revolution.
It was shown by means of simulation fiber-qireless the availability-aware routing accrss is able to achieve a higher average availability for the selected paths than the shortest path routing, especially at low traffic loads. The frequent handovers may cause numerous packet losses, resulting in a fiber-wirelezs decreased network throughput.
Navid Ghazisaidi, PhD – Google Scholar Citations
A variety of next-generation PON technologies are currently investigated to enable short-term evolutionary and long-term revolutionary upgrades of coexistent Gigabit-class TDM PONs [ 28 ]. Each optical terminal is equipped with a thin film filter TFFwhich lets pass only the corresponding wavelength channel of a given optical terminal. By combining the capacity of optical fiber networks with the ubiquity and mobility of wireless networks, FiWi networks form a powerful platform for the support and creation of emerging as well as future unforeseen applications and services, for example, telepresence [ 8 ].
Due to the difficulty and prohibitive costs of supplying optical fiber to all end-user premises as well as the spectrum limitations of wireless access networks, bimodal FiWi access networks are more attractive than relying on either stand-alone access solution.
Fiber-wireless (FiWi) access networks: Challenges and opportunities – Semantic Scholar
Among others, broadband enables the emergence of business models, processes, and inventions as well as improved goods and services. The level of provided quality-of-service QoS largely depends on the performance of the implemented routing and resource management algorithms, including bandwidth allocation and channel assignment algorithms with absolute or relative QoS opportunitoes.
In a detailed study carried out by the Organisation for Economic Cooperation and Development OECD [ 1 ] it was fwii that the impact of providing residential and business subscribers with broadband access is manifold.
The presented simulation results show that under different network sizes the proposed tabu search heuristic outperforms random and fixed ONU placement schemes in terms of achievable network throughput, especially for an increasing number fiber-woreless ONUs. Wireless and optical access networks can be thought of as complementary. UrbanGustavo C. It is important to note, however, that in general the goal of utilities is to use only a small number of low-cost, simple, reliable, and future-proof smart grid communications technologies that remain in place for decades after installation.
Subsequently, for each pair of router and gateway a single or alternatively for load balancing minimum-weight path s is are computed. opportunitues
Fiber-wireless (FiWi) access networks: Challenges and opportunities
Also fibet-wireless that the capacity of the PON is much higher than that of the wireless front-end such that peer-to-peer traffic can be easily carried in the optical backhaul without suffering from any serious throughput penalty. View at Scopus N. The delay along different paths may be different and may vary over time. The simulation and experimental work in [ 68 ] has shed some light on the tradeoff between energy saving and QoS support in FiWi access networks.
Future FiWi access networks will leverage on next-generation PON and WLAN technologies to meet the ever-increasing bandwidth requirements of new and emerging video-dominated applications and services. Apart from capacity, one of the major differences between the optical and wireless parts of FiWi access networks is the fact that optical wired links are much more reliable than their wireless counterparts, whose transmission characteristics depend on a number of different parameters.