Policy-Driven Data Dissemination for Context-Aware Applications

Context-aware pervasive-computing applications require continuous monitoring of their physical and computational environment to make appropriate adaptation decisions in time. The data streams produced by sensors, however, may overflow the queues on the dissemination path. Traditional flow-control and congestioncontrol policies either drop data or force the sender to pause. When the data sender is sensing the physical environment, however, a pause is equivalent to dropping data. Instead of arbitrarily dropping data that may contain important events, we present a policydriven data dissemination service named PACK, based on an overlay-based infrastructure for efficient multicast delivery. PACK enforces application-specified policies that define how to discard or summarize data flows wherever queues overflow on the data path, notably at the mobile hosts where applications often reside. A key contribution of our approach is to uniformly apply the eam "packing" abstraction to queu...

• Type: Conference
• Year: 2005
• Where: PERCOM
• Authors: Guanling Chen, David Kotz
• Keywords: Data Dissemination Service, Data Path, Data Sender, PERCOM 2005, Wireless Networks