Protocolos de roteamento cientes de QoS para redes de sensores e atuadores sem fio
Abstract
Wireless sensor networks are increasingly being deployed for fine-grain monitoring of
physical environments subjected to critical conditions such as fire, leaking of toxic gases
and explosions. A great challenge to these networks is to provide channels that satisfy the
necessities of the applications for events propagation, even in the presence of emergency
conditions that can lead to node failures and path disruption to the sink that receives those
events. Quality of Service (QoS) mechanisms can be applied that meet application
requirements such as: low latency and packet delivery reliability, fast path repair in the
presence of faults and network longevity with uniform energy dissipation. This work
presents QoS-based routing solutions, which aims to meet, simultaneously, the main
requirements mentioned above. The proposed solutions were implemented and simulated in
the NS-2 simulator. Important metrics, such as end-to-end delay, packet loss rate, control
messages overhead and energy consumption, were evaluated. The results show that the
proposed solutions can be a potential alternative to the supervision and control of physical
environments subject to emergency situations