433 citations · 1.1k across the 23 of their papers we have counts for
8 papers · 1 filter
The Thinnest Path Problem
Jianhang Gao, Qing Zhao, Ananthram Swami
We formulate and study the thinnest path problem in wireless ad hoc networks. The objective is to find a path from a source to its destination that results in the minimum number of…
Adaptive Shortest-Path Routing under Unknown and Stochastically Varying Link States
Keqin Liu, Qing Zhao
We consider the adaptive shortest-path routing problem in wireless networks under unknown and stochastically varying link states. In this problem, we aim to optimize the quality of…
On the Connectivity and Multihop Delay of Ad Hoc Cognitive Radio Networks
Wei Ren, Qing Zhao, Ananthram Swami
We analyze the multihop delay of ad hoc cognitive radio networks, where the transmission delay of each hop consists of the propagation delay and the waiting time for the availabili…
Connectivity of Heterogeneous Wireless Networks
Wei Ren, Qing Zhao, Ananthram Swami
We address the connectivity of large-scale ad hoc heterogeneous wireless networks, where secondary users exploit channels temporarily unused by primary users and the existence of a…
Optimality of Myopic Sensing in Multi-Channel Opportunistic Access
Sahand H. A. Ahmad, Mingyan Liu, Tara Javidi +2
We consider opportunistic communications over multiple channels where the state ("good" or "bad") of each channel evolves as independent and identically distributed Markov processe…
Power Control in Cognitive Radio Networks: How to Cross a Multi-Lane Highway
Wei Ren, Qing Zhao, Ananthram Swami
We consider power control in cognitive radio networks where secondary users identify and exploit instantaneous and local spectrum opportunities without causing unacceptable interfe…
Joint Design and Separation Principle for Opportunistic Spectrum Access in the Presence of Sensing Errors
Yunxia Chen, Qing Zhao, Ananthram Swami
We address the design of opportunistic spectrum access (OSA) strategies that allow secondary users to independently search for and exploit instantaneous spectrum availability. Inte…
Dynamic Spectrum Access: Signal Processing, Networking, and Regulatory Policy
Qing Zhao, Brian M. Sadler
In this article, we first provide a taxonomy of dynamic spectrum access. We then focus on opportunistic spectrum access, the overlay approach under the hierarchical access model of…