An Investigation into the Advantages, Mechanisms, and Developmental Challenges of Scripted Mobile Routing

Mobile Ad Hoc Network (MANET) routing protocols provide routing solutions in mobile wireless networks, without assuming any prior knowledge of topology nor any prediction of future topology. However, the resulting routes suffer from delay and consume precious bandwidth. Perfectly scripted routing could theoretically be optimal, (i.e., introduce no delay and cost no additional bandwidth), but would naturally be very fragile. This thesis explores a merging of these approaches, following a routing script if and when available, but reverting to a robust recovery approach otherwise. Script-Assisted Ad Hoc On-demand Distance Vector (S-AODV) routing protocol is designed to take advantage of prior knowledge of topology to improve performance in a MANET, better utilizing available bandwidth. S-AODV uses pre-simulation to build a script to substitute for the route discovery process, avoiding delay and bandwidth penalties. Before sending any Route Request Packets (RREQs) to find a route, S-AODV consults the script. If the data exists, it updates the routing table. If not then it broadcasts RREQs like AODV routing protocol. Using this approach, S-AODV enjoys reduced routing traffic and route discovery times. S-AODV is compared with Ad Hoc On-demand Distance Vector (AODV) routing protocol. S-AODV provides better performance in reducing routing traffic, route discovery time, and end-to-end delay. Also, S-AODV has better throughput in most scenarios except the environment in fast movement or heavy traffic loads

Proactive Highly Ambulatory Sensor Routing (PHASeR) protocol for mobile wireless sensor networks

This paper presents a novel multihop routing protocol for mobile wireless sensor networks called PHASeR (Proactive Highly Ambulatory Sensor Routing). The proposed protocol uses a simple hop-count metric to enable the dynamic and robust routing of data towards the sink in mobile environments. It is motivated by the application of radiation mapping by unmanned vehicles, which requires the reliable and timely delivery of regular measurements to the sink. PHASeR maintains a gradient metric in mobile environments by using a global TDMA MAC layer. It also uses the technique of blind forwarding to pass messages through the network in a multipath manner. PHASeR is analysed mathematically based on packet delivery ratio, average packet delay, throughput and overhead. It is then simulated with varying mobility, scalability and traffic loads. The protocol gives good results over all measures, which suggests that it may also be suitable for a wider array of emerging applications