Wavelength-agile and radio-agile FiWi access network using dynamic scheduling to improve upstream delay and resource utilization.

Fiber wireless (FiWi) access network which is also referred as hybrid wireless optical broadband access network is one of the modern architecture to solve the problem of bandwidth availability and flexibility simultaneously. It integrates wireless frontend with optical backend. In FiWi network most of component remains idle for large duration, hence efficiency is very crucial. To improve energy efficiency in FiWi many multiple access (MA) techniques had been implemented at backend. However inclusion of multiple access techniques usually incur problem of delay, as data transfer in such network takes place only in the assigned slot of access technique. In this paper a novel architecture is proposed for FiWi which implements wavelength agile hybrid multiple access at backend and radio agile access technique at frontend. Further to improve delay performance, bandwidth availability and utilization of resources; a new scheduling approach is proposed for multiple access techniques implemented at frontend as well as backend. Delay performance, wavelength availability and load handling capacity of proposed approach is compared with different hybrid multiple access architecture. To best of our knowledge, wavelength agile and radio agile MA has been used for the first time in FiWi, moreover the proposed scheduling approach implemented on MA provide promising results in terms of delay and resource utilization. The performance of proposed work is also evaluated in terms of service and reservation delay component to indicate its utility in terms of actual information content per frame. The result shows effectiveness of proposed architecture over other existing architectures.

Fiber wireless (FiWi) access network: ONU placement and reduction in average communication distance using whale optimization algorithm.

Explosive growth in the field of Information and Communication Technology demands an access technology which can serve users better Internet speed in "anytime anywhere" manner. Fiber Wireless (FiWi) access technology is one of the existing technologies that fulfills the current demands of users in cost-efficient manner. Some of the important issues of the FiWi network are ONU placement and energy saving. ONU placement issue affects the deployment cost and network performance while energy saving is the need for green technology. On taking consideration of these two issues we propose a whale optimization algorithm for ONU placement for FiWi network. The proposed algorithm optimizes the position of ONUs in such a manner that all deployed wireless routers can connect to their primary ONUs with minimum possible average communication distance. Simulation is performed for varying number of wireless routers to check the worthiness of the proposed algorithm. Results show that the proposed algorithm reduces the average communication distance between ONU and its associated wireless routers hence, it may offer the best way to deploy energy efficient FiWi network.