Abstract: Mobile ad hoc networks are prone by nature to path breaks and reconnections. Routing protocols such as OLSR that provide topology information with a mini- mum delay to the quick reconfiguration of path breaks are desired. Applications and protocols should be able to adapt to the dynamics of these networks. However, this is not true for most applications and protocols. For example, a video streaming server does not be- come aware of the path break because it does not in- teract with lower layers that inform about this event. As a result, important resources such as battery and bandwidth are not used efficiently, and TCP connec- tion failures happen frequently. In this paper, we present a proxy based solution to detect path breaks and reconnections using the proactive OLSR protocol for ongoing streaming sessions and we do corrective actions at the application layer to lead a more effi- cient usage of the bandwidth during disconnections.
www.gta.ufrj.br/ftp/gta/TechReports/ECM08.pdf
Abstract— This paper presents the design of a plug-in for the Optimized Link State Routing (OLSR) protocol with the Expected Transmission Time (ETT) metric and experiments in an indoor testbed. The ETT metric is implemented as a plug-in, keeping portability and facilitating its deployment on operational networks. Our design identifies important implementation issues. Additionally, we run experiments in an indoor testbed to verify the performance of our ETT plug-in. Our results show that the ETT metric has the lowest packet loss rate and the lowest round trip time among the analyzed metrics, because it reproduces link quality conditions and also takes into account physical transmission rates.