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Utilization and fairness in spectrum assignment for opportunistic spectrum access

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Abstract

The Open Spectrum approach to spectrum access can achieve near-optimal utilization by allowing devices to sense and utilize available spectrum opportunistically. However, a naive distributed spectrum assignment can lead to significant interference between devices. In this paper, we define a general framework that defines the spectrum access problem for several definitions of overall system utility. By reducing the allocation problem to a variant of the graph coloring problem, we show that the global optimization problem is NP-hard, and provide a general approximation methodology through vertex labeling. We examine both a centralized strategy, where a central server calculates an allocation assignment based on global knowledge, and a distributed approach, where devices collaborate to negotiate local channel assignments towards global optimization. Our experimental results show that our allocation algorithms can dramatically reduce interference and improve throughput (as much as 12-fold). Further simulations show that our distributed algorithms generate allocation assignments similar in quality to our centralized algorithms using global knowledge, while incurring substantially less computational complexity in the process.

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Authors and Affiliations

  1. Department of Automation, Tsinghua University, Beijing, China

    Chunyi Peng

  2. Department of Computer Science, University of California, Santa Barbara, CA, USA

    Haitao Zheng & Ben Y. Zhao

Authors
  1. Chunyi Peng
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  2. Haitao Zheng
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  3. Ben Y. Zhao
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Corresponding author

Correspondence to Haitao Zheng.

Additional information

A part of this work has been presented at IEEE International conference on communications (ICC), May, 2005.

Chun-Yi Peng received her B.E.degree (with highest honor) and M.E.degree (with highest honor) from Tsinghua University, Beijing, China, in July 2002 and Jan. 2005, respectively. Since Dec. 2005, she has been an assistant researcher in Wireless and Network Group, Microsoft Research Asia, Beijing, China. Prior to that, she was with T3G Technical Co. Ltd., Beijing, China, as a technical engineer on 3G TD-SCDMA development from Feb. 2005 to Nov. 2005; and a visiting student at Microsoft Research Asia from June 2004 to Jan. 2005. Her research interests include wireless communications and networking, and signal processing.

Haitao (Heather) Zheng received her B.S.degree (with highest honor) from Xian Jiaotong University in July 1995, her M.S.EE and Ph.D degree in Electrical and Computer Engineering from University of Maryland, College Park, in May 1998 and July 1999, respectively. She joined wireless research lab, Bell-Labs, Lucent Technologies as a member of technical staff in August 1999, and moved to Microsoft Research Asia as a project lead and researcher, in March 2004. Since Sept. 2005, she has been an assistant professor in Computer Science Department, Univ. of California, Santa Barbara. Dr. Zheng was recently named as the 2005 MIT Technology Review Top 35 Innovators under the age of 35 for her work on cognitive radios. She received 2002 Bell Laboratories President’s Gold Award from Lucent Bell-Labs, and 1998—1999 George Harhalakis Outstanding Graduate Student Award from Institute of System Research, University of Maryland, College Park. Dr. Zheng was admitted to the highly gifted class of Xi’an Jiaotong Univeristy, P.R. China at age of 15, and graduated with the highest honor. She has served as guest editors of JSAC and EURASIP special issues and TPC members of many conferences. Dr. Zhengs research area includes wireless communications and networking and multimedia computing.

Ben Y. Zhao joined the faculty at University of California at Santa Barbara in 2004. He received his Ph.D. from the University of California at Berkeley, where he worked under the direction of Professors John Kubiatowicz and Anthony Joseph. At Berkeley, he was the principal architect of the Tapestry peer-to-peer network and a co-founder of the Ocean Store global-scale storage project. He has co-authored over 30 papers in networking and systems research areas. Ben is on the TPC of a number of conferences and workshops. He is on the steering committee of AEPP, and the current Program Co-chair of IPTPS 2006. His research interests lie in computer systems and networking, particularly large-scale distributed and networked systems, network security, mobile computing and overlay networks. Ben received his B.S. degree in computer science from Yale University and his M.S. degree in computer science from University of California at Berkeley.

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Peng, C., Zheng, H. & Zhao, B.Y. Utilization and fairness in spectrum assignment for opportunistic spectrum access. Mobile Netw Appl 11, 555–576 (2006). https://doi.org/10.1007/s11036-006-7322-y

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  • DOI: https://doi.org/10.1007/s11036-006-7322-y

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