Decentralized Cognitive MAC for Dynamic Spectrum Access

Abstract

We consider the problem of opportunistic dynamic spectrum access (DSA) in an ad hoc network in which unlicensed secondary users communicate through channels not used by the primary users. Decentralized cognitive medium access control protocols are presented that allow secondary users to recognize spectrum opportunity and transmit based on a partial observation of the instantaneous spectrum availability. Under a framework of Partially Observable Markov Decision Process (POMDP), we derive optimal and suboptimal decentralized strategies for the secondary users to decide which channel(s) to sense and access for the maximization of the overall network throughput.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Nov 01, 2005
Accession Number
ADA633473

Entities

People

  • Ananthram Swami
  • Lang Tong
  • Qing Zhao

Organizations

  • University of California

Tags

Communities of Interest

  • Energy and Power Technologies
  • Human Systems

DTIC Thesaurus Topics

  • Ad Hoc Networks
  • Algorithms
  • Availability
  • Computational Complexity
  • Heterogeneous Networks
  • Markov Chains
  • Markov Processes
  • Mesh Networks
  • Military Research
  • Networks
  • Observation
  • Probability
  • Simulations
  • Spectra
  • Statistics
  • Throughput
  • Wireless Networks

Readers

  • Adaptive Control and Estimation with Uncertainty in Dynamic Systems.
  • Radio communications and signal processing.