Throughput Improvement of Mobile Multi-hop Wireless Networks

This paper demonstrates the use of some novel cognitive techniques we propose to improve the throughput of a mobile WIMAX network and minimize the packet losses. We propose a novel method called Orthogonal Frequency Division Most Congested Access First (OFDMCAF), to modify the spectrum sharing technique of (Time Division Multiple Access) TDMA and (Orthogonal Frequency Division Multiple Access) OFDMA and to manage the spectrum access. The heavy multimedia traffic is managed by OFDMCAF with novel spectrum sharing and buffer management methods we propose. By use of novel cognitive methods, real time voice and video packet transmissions have been provided with full success and the packet loss rate of data packets has been minimized. The simulation results are confirmed by comparing them with results of other publications and comparing with results of packet loss calculations we made. The results are usable in designing unicast mobile multimedia network with improved system throughput.