Universal mobile ad-hoc system design interoperable with cellular networks and internet

Abstract

This thesis presents a system design for cognitive ad-hoc mobiles in the wireless-optical broadband access network (WOBAN), in order to reduce routing pathways, power consumption and signal interference in space. It presents a global unify system architecture, which can be supervised or self-organized in various zones of WPAN, WLAN and WWAN; A system, which can define and construct intelligence of the wireless network on it. The network is widely scalable and interoperable with other networks including cellular networks, public switched telephone networks (PSTN) and Internet. We denote these newly designed mobiles as UMAS (universal mobile ad-hoc system) mobiles. The goal of UMAS network topology is to construct a dynamic homogenous grid network from a random mobile ad-hoc network.<br />This dissertation presents a new design for dynamic topology control, medium access control and Internet position protocols (IPP). IPP defines a new positioning and addressing method based on the relative positioning system (RPS). In the case that nodes cannot access to the positioning methods, IPP applies the dynamic addressing based on RPS and applies a hybrid routing method. It accelerates the handover process in mobile nodes and reduces the address and routing overhead for wireless communication. By auto-configuration addressing and constructing a virtual backbone, the route-discovery process simplifies, and the flooding is avoided in the UMAS network. To do this, the packets are forwarded to the addresses, which indicate their position. UMAS mobility management and handover processes benefit from both topology knowledge and neuro-fuzzy algorithms to reduce signaling, bit error rate (BER) and congestion in the UMAS network. According to the nodes' density, service request, velocity and link distance, each node recognizes an appropriate power and channel communication, in order to reduce signal interference and increase quality-of-service (QoS). In the case of increasing the density and traffic of the network, UMAS activates the lower hierarchy layer (reduces the transmit power of nodes) while considering to fulfill the minimum latency for the service request. This dissertation presents a super-frame structure to regulate the packet transmission, which additionally reduces the BER and power consumption in MANET. Through this frame structure, it defines matrix communication in the UMAS network and schedules every group of nodes in a time-frame in order to reduce the frame error and save energy.<br />