Sarah Sharafkandi

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We propose and evaluate an energy-efficient scheduling algorithm for detection of mobile targets in wireless sensor networks. We consider a setting where the sensors are deployed for both road surveillance and mobile target tracking. A typical example would be where some sensors are deployed along the entrance roads of a city to detect the vehicles entering(More)
With ever increasing storage demands and management costs, object based storage is on the verge of becoming the next standard storage interface. The American National Standards Institute (ANSI) ratified the object based storage interface standard (also referred to as OSD T-10) in January 2005. In this paper we present our experiences building a reference(More)
With ever increasing storage demands and management costs, object based storage is on the verge of becoming the next standard storage interface. The American National Standards Institute (ANSI) ratified the object based storage interface standard (also referred to as OSD T-10) in January 2005. In this paper we present our experiences building a reference(More)
In this paper, we study the behavior of TCP protocol over multihop ad-hoc networks. TCP is a reliable transport protocol that at first was conceived for wired networks. The congestion control mechanism of TCP is designed for wired environments and is not adapted with wireless networks such as multihop ad-hoc networks which have different characteristics in(More)
The effectiveness of DSRC for collision avoidance depends on the communication performance of safety messages. EDCA, the standard IEEE 802.11 QoS capability, was designed for networks with a mix of voice, video and best effort traffic. This paper examines how to use EDCA to reduce frame collisions for a channel dominated by periodic safety messages. The(More)
—In wireless sensor networks, collection of raw sensor data at a base station provides the flexibility to perform offline detailed analysis on the data which may not be possible with in-network data aggregation. However, lossless data collection consumes considerable amount of energy for communication while sensors usually have limited energy. In this(More)
This paper addresses the problem of using standard EDCA to minimize frame collisions among periodic vehicle safety messages. We make two principal contributions. First we demonstrate an Access Category (AC) isolation technique that dramatically reduces the collision probability of high priority packets in dense environments. Second we introduce a novel(More)
In wireless sensor networks, collection of raw sensor data at a base station provides the flexibility to perform offline detailed analysis on the data which may not be possible with innetwork data aggregation. However, lossless data collection consumes considerable amount of energy for communication while sensors usually have limited energy. In this paper,(More)
Traffic safety applications using VANET can significantly improve road safety if safety packets can be delivered on time. Therefore, a MAC layer protocol for VANET that can guarantee timely delivery of data is critical. Currently, the MAC layer standard that is supporting inter-vehicular communication is IEEE 802.11 which is a contention based protocol(More)
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