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 .
||25 September 2006
|PDF File Size:
|ePub File Size:
||Free* [*Free Regsitration Required]
In a detailed study carried out by the Organisation for Economic Cooperation and Development OECD [ 1 ] it was shown that the impact of providing residential and business subscribers with broadband access is manifold. The use of a colorless SOA as an amplifier and modulator challengee upstream transmission provides a promising low-cost RoF solution that is easy to maintain [ 17 ].
RoF networks are attractive since they provide transparency against modulation techniques and are able to support various digital formats and wireless standards in a cost-effective manner. Bringing fiber all the way to buildings gives rise to FTTB networks.
Among others, broadband enables the emergence of business models, processes, and inventions as well as improved goods and services. The reported results show that E-MPCP and IOW-AC are superior to the separated resource management scheme netwofks terms of channel utilization and dropping probability for both fiber-woreless and real-time traffic.
Given that most 4G cellular mobile network researches so far have been fiber-wirelrss on the achievable performance gains in the wireless front-end only without looking into the details opportuunities backhaul implementations and possible backhaul bottlenecks, we identify open key research challenges for FiWi broadband access networks.
By simultaneously providing wired and wireless services over the same infrastructure, FiWi access networks are able to consolidate optical and wireless access networks that are usually run independently of each other, thus potentially leading to major cost savings.
The CO is responsible for managing the transmission of information between mobile client nodes MCNs and their associated APs as well as acting as a gateway to other networks.
The simulation and experimental work in [ 68 ] has shed some light on the tradeoff between energy saving and QoS support in FiWi access networks. See our FAQ for additional information. The frequent handovers may cause numerous packet losses, resulting in a significantly decreased network throughput.
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 netwoks, 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 challlenges characteristics depend on a number of different parameters.
The greedy algorithm starts with a given distribution of wireless end-users, which might be randomly or deterministically chosen, and consists of two phases. To enhance the reliability of the wireless link, the CO sends information to two different APs path diversity. The inter-ONU traffic from all ONUs is combined into one fiber by means of a passive combiner, which is attached to one of two input ports of an arrayed-waveguide grating AWG.
UrbanGustavo C. Different low-latency polling schemes for long-reach PONs were analyzed in [ 7879 ].
Fiber-wireless (FiWi) access networks: Challenges and opportunities – Semantic Scholar
Recently, a number of major telecommunication service providers such as KT and Telecom Italia have started to move into the energy market. When migrating from macro-only to HetNet environments, mobility management becomes more challenging due to increased interference and decreased femto cell radius. View at Scopus N. Citations Publications citing this paper. The basic building block of GROW-Net is the grid-cell, which provides the backbone fiber connectivity to wireless gateways.
Advances in Optics
The model can be solved for small FiWi network instances. Using CaDAR for routing, it was shown by means of simulation that the proposed flow-aware channel assignment scheme effectively balances the load across different wireless channels, resulting in a reduced contention throughout the wireless front-end.
To enable loss-free transport of high-priority traffic across the OBS core network, each OBS network node is assigned a number of local andd channels that are dedicated to the transmission of high-priority traffic. Another important development is the increasing interest of many mobile network operators in the implementation of the common public radio interface CPRI.
Electrical power grids represent one of the most important critical infrastructures of our society. FiWi networks hold great promise to change the way we live and work by replacing commuting with teleworking.
Wireless networks aimed at meeting specific service requirements while coping with particular ajd impairments and optimizing the utilization of the system resources to ensure cost-effectiveness and satisfaction for the user. Toward this end, the proposed heuristic deploys the wireless access points or base stations uniformly, determines their transmission radius, and assigns channels to them such that the carrier-to-interference ratio does not drop below a certain threshold.
In the event of one or more FiWi network failures, the risk list of affected mesh routers is updated accordingly. For tractability, the authors used Lagrangian relaxation to relax some of the constraints and solve the MIP problem with acceptable accuracy.
Based on the LSP information, each wireless link is assigned a weight according to its predicted transmission, synchronization, and queuing delay. As shown in Figure 4suppose that wireless mesh client wants to communicate with mesh client.
OWI aims at integrating PONs and other optical fiber access technologies with broadband wireless access technologies, fiber-wireles example, WiMAX, in order to increase the capacity of wireless access networks and reduce access point complexity through centralized management [ 12 ].
Navid Ghazisaidi, PhD – Google Scholar Citations
View at Google Scholar F. View at Scopus M. Traditionally, wireless and optical fiber networks have been designed separately from each other. Each optical terminal is equipped with a thin film filter TFFwhich lets pass only the corresponding wavelength channel of a given optical terminal.
The objective of the routing algorithm is to route traffic in the FiWi network such that network throughput is maximized. FiWi networks and access networks in general suffer from a major shortcoming.
While significant progress has been made at the PHY layer of FiWi and in particular RoF transmission systems, FiWi networking research on layer-2 and layer-3 related issues has begun only recently. In the upstream direction, wireless mesh routers forward data packets to one of the wireless gateways, where they are then transmitted to the CO on one of the wavelength channels of the optical backhaul WDM ring, as each PON operates on a separate dynamically allocated wavelength channel.
The framework comprises two parts. For each successful perturbation, wireless end-users are reassigned to their nearest ONU. The presented simulation results investigated the average packet delay for CaDAR under the assumption of equally and unequally loaded ONUs. One of the most promising examples of such a multitier business model is the Swiss Fibre Net of OPENAXS, an association of currently 22 regional electricity utilities throughout Switzerland see also http: