# Browse Research and Tech Reports - Computer Science by Author "Hou, Jennifer C."

• (2004-07)
In this paper, we study how the achievable throughput scales in a wireless network with randomly located nodes as the number of nodes increases, under a communication model where (i) each node has a maximum transmission ...

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• (2006-04)
This technical report presents a comprehensive study of the Enhanced Distributed Control Access (EDCA) function defined in IEEE 802.11e. All the three factors are considered. They are: contention window size (CW), arbitration ...

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• (2007-07)
The transmit power and the carrier sense threshold are two major MAC/PHY parameters in CSMA/CA wireless networks. The problem of transmit power control has been extensively studied in the context of graph-theoretic topology ...

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• (2005-08)
In this paper, we address the issue of localization in anisotropic sensor networks. Anisotropic networks are differentiated from isotropic networks in that they possess properties that vary according to the direction of ...

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• (2004-07)
Distinct from wireless ad hoc networks, wireless sensor networks are data-centric, application-oriented, collaborative, and energy-constrained in nature. In this paper, we formulate the problem of data transport in sensor ...

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• (2004-04)
The development of wireless communication in recent years has posed new challenges in system design and analysis of wireless networks, among which energy efficiency and network capacity are perhaps the most important issues. ...

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• (2007-05)
In recent years, wireless ad hoc networks have become increasingly popular in both military and civilian applications due to its capability of building networks without the need for a pre-existing infrastructure. While a ...

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• (2004-10)
A fully connected topology is critical to many fundamental network operations in wireless ad-hoc networks. In this paper, we consider the problem of deploying additional wireless nodes to improve the connectivity of an ...

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• (2004-10)
Internet traffic sampling techniques are very important to understand the traffic characteristics of the Internet, and have received increasing attention. In spite of all the research efforts, none has taken into account ...

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• (2004-07)
Existing network simulators perform reasonably well in evaluating the performance of network protocols, but lack the capability of verifying the correctness of network protocols. In this paper, we present our ongoing ...

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• (2006-08)
In CSMA/CA-based, multi-hop, multi-rate wireless networks, spatial reuse can be increased by tuning the carrier-sensing threshold (T_{cs}) to reduce the carrier sense range (d_{cs}). While reducing d_{cs} enables more ...

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• (2005-04)
Before a sensor network is deployed, it is important to determine how many sensors are required to achieve a certain coverage degree. The number of sensor required for maintaining $k$-coverage depends on the area of the ...

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PDF (198kB)
• (2003-12)
Power management is an important technique to prolong the lifetime of battery-powered wireless ad hoc networks. The fact that the energy consumed in the idle state dominates the total power consumed on wireless network ...

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PDF (195kB)
• (2004-07)
IEEE 802.11 power saving mode (PSM) has been proposed in wireless LANs and multi-hop wireless networks to coordinate power states of wireless devices. In IEEE 802.11 PSM, power management decisions to wake up wireless ...

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• (2004-07)
In this paper, we address the issue of integrating packet level simulation with fluid model based simulation for IEEE 802.11-operated wireless LANs (WLANs), so as to combine the performance gains of the latter with the ...

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• (2007-04)
In this paper, we derive an analytical model to evaluate the effect of jointly tuning the carrier sense threshold and employing multiple data rates on the network capacity in multi-rate, multi-hop wireless networks. The ...

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• (2006-08)
In this paper, we extend both Bianchi.s and Kumar.s models and characterize the channel activities governed by IEEE 802.11 DCF in multi-hop wireless networks from the perspective of an individual sender. In particular, we ...

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• (2004-04)
In this paper, we present a rescaling simulation methodology (RSM) to expedite simulation in large-scale TCP/IP networks without loss of fidelity of simulation results. Conceptually, we scale down the network to be simulated ...

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• (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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• (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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