Cognitive Routing Models
Luca De Nardis, Maria-Gabriella Benedetto · Auerbach Publications eBooks · 2008
This chapter investigates the effect of introducing cognitive mechanisms in the routing function of a wireless network.First, a review of existing proposals for introducing cognition in the routing process is presented.Next, a routing cost function incorporating measurements of the instantaneous behaviour of the external world, represented by the interference suffered by overlaid networks, is defined.The function is applied in the framework of IEEE 802.15.4a-like low data rate and low cost networks for mixed indoor/outdoor communications.The behavior of a network of nodes that implements the cognitive approach in the routing module is analyzed by simulation, measuring network performance and network lifetime.Results indicate that the introduction of a mechanism that allows the routing strategy to adapt to the environment and to adjust its principles of operation as a function of both external and internal unpredictable events leads to a remarkable improvement in network performance.