Browse by Subject "wireless networks"

  • Hu, Chunyu; Hou, Jennifer C. (2006-08)
    In this paper, we devise, in compliance with the IEEE 802.11e protocol [1], a novel MAC-centric approach, called MAC contention control (MCC), to maximizing the bandwidth utilization and achieving proportional bandwidth ...

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  • Zhang, Honghai; Hou, Jennifer C. (2005-04)
    In this paper we study the asymptotic minimum energy required to transport (via multiple hops) data packets from a source to a destination. Under the assumptions that nodes are distributed according to a Poisson point ...

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  • Yoo, Joon; Luo, Haiyun; Kim, Chong-kwon (2006-07)
    Recent advances in the speed of multi-rate wireless local area networks (WLANs) and the proliferation of WLAN devices have made rate adaptive, opportunistic scheduling critical for throughput optimization. As WLAN traffic ...

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  • Park, Kyung-Joon; Choi, Jihyuk; Hou, Jennifer C. (2007-05)
    We investigate the problem of maximizing network capacity sustained by IEEE 802.11 DCF in multi-hop wireless networks. By explicitly incorporating two key system parameters . carrier sense threshold and transmit power . ...

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  • Xue, Yuan; Li, Baochun; Nahrstedt, Klara (2004-12)
    The shared-medium multi-hop nature of wireless ad hoc networks poses fundamental challenges to the design of effective resource allocation algorithms that are optimal with respect to resource utilization and fair across ...

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  • He, Wenbo; Liu, Xue; Nguyen, Hoang; Nahrstedt, Klara; Abdelzaher, Tarek F. (2006-09)
    A wireless sensor network (WSN) is an ad-hoc network composed of small sensor nodes deployed in large numbers to sense the physical world. Wireless sensor networks have very broad application prospects including both ...

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  • Bhandari, Vartika (2008-10)
    Recent years have seen a proliferation in the use of wireless multi-hop networks in diverse scenarios ranging from community mesh networks to wireless sensor networks. As wireless networks find application in such wide-ranging ...

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  • Thompson, Nathanael A.; Luo, Haiyun (2006-07)
    802.11 networks have spread rapidly in residential areas, and it is common for neighbors to receive the signals from each other's home wireless routers. Residents can leverage such an opportunity to improve their Internet ...

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  • Xue, Yuan (2005-10)
    Recent advances in wireless communications and digital electronics have enabled rapid development of a variety of wireless network technologies. The undeniable popularity of wireless network is due to its ubiquity and ...

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  • Chiang, Jerry (2012-02-01)
    Availability, together with confidentiality and integrity, form the basic concepts of information security. Indeed, a device, protocol, or network can enjoy the highest level of confidentiality and integrity, but still ...

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  • Chen, Chun-cheng; Seo, Eunsoo; Luo, Haiyun; Vaidya, Nitin H. (2006-06)
    The majority of existing wireless rate controls are based on the implicit assumption that frames are corrupted due to the random, arbitrary environmental and thermal noises. They generally reduce the channel rate on frame ...

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  • Hu, Chunyu; Hou, Jennifer C. (2005-03)
    A major problem with leveraging event-driven, packet-level simulation environments, such as ns2 [15], J-Sim [1], OpNet [3]), and QualNet [4]), in conducting wireless network simulation is the vast number of events generated, ...

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  • Patel, Jay A.; Luo, Haiyun; Gupta, Indranil (2007-11)
    The design of single transceiver based multi-channel multi-hop wireless mesh networks focuses on the trade-off between rapid neighbor synchronization and maximizing the usage of all available channels. Existing designs are ...

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  • Chang, Sang-Yoon; Hu, Yih-Chun (2010-08-09)
    In reservation-based MAC protocols, adversaries that have compromised a node can perform an efficient denial-of service attack by sending excessive reservation requests. Attackers, having thus prevented legitimate users ...

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  • He, Wenbo; Nguyen, Hoang; Liu, Xue; Nahrstedt, Klara; Abdelzaher, Tarek F. (2006-11)
    Data aggregation is an efficient mechanism to collect statistics of data in wireless sensor networks. However, the shared-medium nature of communication facilitates eavesdropping and packet tampering/injection by adversaries. ...

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  • Raja, Adnan (2012-05-22)
    In this dissertation, tools from information theory are used to study multiterminal wireless networks. A compress-and-forward scheme with layered decoding is presented for the unicast and multi-source wireless network ...

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  • Hu, Chunyu; Hou, Jennifer C. (2005-12)
    The broadcast nature of the wireless medium and its susceptibility to interference not only affects the capacity of wireless networks but also has an impact on the fidelity, accuracy and efficiency of wireless network ...

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  • Chen, Chun-cheng; Chekuri, Chandra (2007-08)
    As more and more cities plan to deploy municipal wireless mesh networks to provide publicly-accessible infrastructure, it becomes critical to come up with a deployment plan that provides sufficient accessibility with ...

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  • Xue, Yuan; Cui, Yi; Nahrstedt, Klara (2005-06)
    Energy efficient routing is a critical problem in multihop wireless networks due to the severe power constraint of wireless nodes. Despite its importance and many research efforts towards it, a distributed routing algorithm ...

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  • Xue, Yuan; Cui, Yi; Nahrstedt, Klara (2006-04)
    Energy efficient routing is a critical problem in multihop wireless networks due to the severe power constraint of wireless nodes. Despite its importance and many research efforts towards it, a distributed routing algorithm ...

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