ONU placement in Fiber-Wireless (FiWi) Networks

In recent years, there is a explosive growth in a internet users which require a broadband access network with high capacity and better flexibility and gets service in “anywhere-anytime” manner. The solution is a FIWI technology which proving itself a main tool in the field of telecommunication by its own merits over the other existing technologies. Fiber-Wireless (FiWi) Network is a combination of Passive Optical Network(PON) and Wireless Mesh Network(WMN). It provides large bandwidth capacity and high stability in optical network and lower cost in wireless network. Therefore, FiWi gives users to broadband access service in an “anywhere-anytime” way. In this paper, the main focus on the ONU placement in FiWi network to make a cost-efficient network. The key issue in FiWi network is the placement of optical network unit (ONU) since ONU gives interface between the optical network and wireless network. The placement of ONU plays also an important role in network throughput. In FiWi network, placement of ONU such that it support both type of traffic i.e. Internet traffic and peer-to-peer (P2P) traffic. Internet traffic means traffic from the wireless client to internet and peer-to-peer traffic means traffic from one wireless client to another wireless client. In this paper, the related work done in ONU placement to support both type of traffic and to minimizing the numbers of ONU in a FiWi network is studied. In this paper, how to save energy in ONU in case of low-load or zero-load is also discussed. This is the review paper for enlightening the trends of ONU placement in a FIWI access networks.