Dynamic Bandwidth Allocation in Fiber-Wireless (FiWi) Access Networks

Fiber wireless access (FiWi) network is a category of hybrid network, which cumulates the advantages of optical network and wireless network at frontend and backend respectively. FiWi is one of those networks which are capable of providing high bandwidth as well as great flexibility. In today’s world of high speed applications demand of spectrum is increasing rapidly, hence it becomes critically important to utilized available bandwidth efficiently. Therefore, many dynamic bandwidth allocation (DBA) algorithms have been proposed in recent years for FiWi network which can improve the utilization of bandwidth. DBA algorithms can be classified as DBA at PON, DBA at wireless and hybrid DBA depending upon the implementation of DBA at backend or frontend or both respectively. In this paper, a detail study of DBA at frontend and backend is done; separately as well as simultaneously. Considering bandwidth utilization as most important parameter, its literature and brief explanation is also provided. DBA algorithms are generally categorized in three types of services i.e. limited service DBA, fixed service DBA and gated service DBA. Simulation of these services of DBA is also done in the paper which helps us to analyze the effectiveness of different DBA services by comparing them to each other.