Nadia N. Qadri

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Mobile ad hoc networks (MANETs) are a fundamental element of pervasive networks and therefore, of pervasive systems that truly support pervasive computing, where user can communicate anywhere, anytime and on-the-fly. In fact, future advances in pervasive computing rely on advancements in mobile communication, which includes both infrastructure-based(More)
Developing applications, particularly real-time applications, for wireless vehicular ad hoc networks (VANETs) requires a reasonable assurance of the likely performance of the network, at the least in terms of packet loss ratios and end-to-end delay. Because wireless propagation strongly influences performance, particularly in an urban environment, this(More)
This paper seeks to establish under what conditions (mobility, network size, wireless channel) multi-source video streaming is feasible across a wireless Vehicular Ad Hoc Network (VANET). Overlay networks with multiple sources have proven to be robust, distributed solutions to multimedia transport, including streaming. To achieve video streaming over a(More)
Because of restricted mobility patterns, multi-hop routing, and wireless channel conditions, streaming video over a Vehicular Ad Hoc Network (VANET) is a daunting task. This paper demonstrates that H.264 codec Flexible Macroblock Ordering (FMO) with receiver error concealment is capable of streaming good-quality video across a VANET. FMO is shown to be(More)
Application layer error resilience techniques in video communication are a relatively lightweight way of countering both isolated and burst error patterns. This paper systematically investigates their role. Flexible Macroblock Ordering (FMO) is shown to be an effective form of protection when errors are isolated but when burst errors are likely increasing(More)
In this article, a novel scheme is proposed for switching among multiple bitrate video streams over Internet, to achieve best quality of service (QoS). The research is focused on selecting the best switching points inside the precoded variable bit rate video streams, to facilitate bandwidth scalability among the non-scalable multiple bitstreams. With a(More)
The goal of mobile computing is to provide access to information and resources at anytime, anywhere. The traditional client-server architecture is insufficient to provide these needs, due to various issues like scalability (as the number of nodes grows the server can be overloaded) and link failure (which may lead to server unreachable). To cope with these(More)
This paper introduces P2P communication across a VANET and seeks to establish under what conditions (mobility, network size, wireless channel) data streaming is feasible. Routing of streamed services over multiple hops and multiple paths may result in significant packet losses, resulting in unacceptable quality of service. This paper examines the impact of(More)