There are wireless links between any two wireless nodes if they are within the transmission range of each other. For any two nodes, and , if they are in the transmission range of each other. In any two ONU nodes, , , the direct communication with infinite capacity see Figure 2 can be placed because the bandwidth capacity provided by the PON subnetwork is much higher than the capacity provided in the wireless subnetwork. If this communication happens in the PON subnetwork, there will be no wireless interference, and the interference set of such links is set to be. If two gateways in traditional WMNs are within transmission range of each other, they can communicate with each other through wireless transmissions.
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This last mile technology will serve all needs of access networks for many years to come. However, its energy consumption has also been increased rapidly due to the development of high bandwidth application like Internet of Things IoT.
Therefore, it has become critically important to discuss the energy-related issue for FiWi. Based on the literature, this chapter provides an exhaustive survey of recent progress on energy efficiency mechanisms such as ONU sleeping mechanisms, power saving modes PSM , and some cooperative-based energy saving schemes. Furthermore, it also provides future directions for better energy efficiency in FiWi network.
References 1. Maier, M. Ghazisaidi, N. IEEE Commun. Sarkar, S. IEEE Netw. University of California Google Scholar 4. Dixit, S. Lightwave Technol.
Martin, M. Coimbra, J. Rohde, Schwarz: White Paper Google Scholar 9. Tamura, H. Kubo, R. Optical Commun. IEEE Yuan, R. Rosenberg, C. Mobile Netw. App 11, — Google Scholar Liu, Y. Nishiyama, H. Miyanabe, K. Peng, P. Peng, W. Chowdhury, A. Ellinas, G. Supplement 45 Google Scholar Fernando, D.
On the Issues and Challenges of Fiber-Wireless (Fi-Wi) Networks
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 assurances. Recently, the moving extended cell concept was proposed to provide connectivity for any possible direction [ 21 surrvey. An interesting approach to solve this problem is the use of an RoF network installed along the rail tracks in combination with the so-called moving cell concept [ 20 ]. In Section 3we review the state of the art of FiWi broadband access networks, while recent jetworks is described in Section 4. In FiWi networks, traffic may go from wireless end-users to the Internet or from one wireless client to another wireless client.
A Review of Recent Energy-Efficient Mechanisms for Fiber-Wireless (FiWi) Access Network