coping with communication gray zones in ieee 802.11b based ad hoc networks
Our experiments with IEEE 802.11b based wireless ad hoc networks show that neighbor sensing with broadcast messages introduces "communication gray zones": in such zones data messages cannot be exchanged although the HELLO messages indicate neighbor reachability. This leads to a systematic mismatch between the route state and the real world connectivity, resulting in disruptive behavior for multi-media data transfer over ad hoc routing protocols. Concentrating on AODV we explore this issue and evaluate three different techniques to overcome the gray zone problem. We present quantitative measurements of these improvements and discuss the consequences for ad hoc routing protocols and their implementations.
communication communication gray zone gray zone ieee 802.11b experience wireless ad hoc networks senses broadcast message data reachability connection behavior routing protocols exploration evaluation measurement implementation mobile ad hoc networks media  ad hoc  networks manet real-world experiment ad-hoc