A Local/Global Strategy Based on Signal Strength for Message Routing in Wireless Mobile Ad-hoc Networks
Ting-Chung Tien, Shambhu Upadhyaya · Kluwer Academic Publishers eBooks · 2005
Route switching is an important issue to connection-oriented communication that needs to maintain a route for a certain period of time. This chapter presents a new approach to ease the route switching problems in a network with a high rate of unit migration. By monitoring the signal strength of messages, a unit in a route that receives an incoming message can detect possible route fluctuations locally. As the average signal strength declines into a dangerous level, the unit that receives the message will send an advance-warning message to the route source unit. If the source unit can find more stable routes locally, it will adapt a substitute route and will complete the process of adaptation before the breakdown of the original route. If the route source unit cannot adapt a new route locally, the source unit will be forced to search for a new route by considering the entire network. The evaluation conducted quantifies the benefits of the new approach.