Sanjit Krishnan Kaul

Learn More
—Increasingly ubiquitous communication networks and connectivity via portable devices have engendered a host of applications in which sources, for example people and environmental sensors, send updates of their status to interested recipients. These applications desire status updates at the recipients to be as timely as possible; however, this is typically(More)
— In this paper we present empirical results from a study examining the effects of antenna diversity and placement on vehicle-to-vehicle link performance in vehicular ad hoc networks. The experiments use roof-and in-vehicle mounted omni-directional antennas and IEEE 802.11a radios operating in the 5GHz band, which is of interest for planned inter-vehicular(More)
—Emerging applications rely on wireless broadcast to disseminate time-critical information. For example, vehicular networks may exchange vehicle position and velocity information to enable safety applications. The number of nodes in one-hop communication range in such networks can be very large, leading to congestion and undesirable levels of packet(More)
— To evaluate routing protocols on a controlled indoor wireless testbed, the radio range must be compressed so that larger multi-hop topologies can be mapped into a laboratory-size area. We propose noise injection as a more flexible option than hardware attenuation and consider methods for mapping real world wireless network topologies onto the testbed. Our(More)
—This work is motivated by network applications that require nodes to disseminate their state to others. In particular, vehicular nodes will host applications that periodically disseminate time-critical state across the network to help improve on-road safety. In this work, we want to minimize the average age of state information that a node observes from(More)
—Antenna diversity is a well-known technique used to improve the quality and reliability of a wireless link. In vehicular networks, a different approach to antenna diversity is needed due to their unique channel characteristics. However, this issue has not been actively researched, especially for the positioning of antennas. In this paper, we highlight the(More)
—IEEE 802.11 WLAN (Wireless or WiFi LAN) clients discover neighboring APs (Access Points) by active or passive scanning. Such an active scan of WLAN injects probe frames in the network. Network conditions like packet losses, roaming, etc. result in increased active scanning and hence, an excessive increase of the probe traffic. Of the several causes(More)
The rapid adoption of smartphones has engendered a large ecosystem of mobile data applications. A large part of mobile traffic is now data and not voice. Many of these applications, for example VoIP clients, stay active in the background. In the background, they may not communicate large amounts of data. However, their regular bursts of activity can lead to(More)