Decentralized cognitive MAC for opportunistic spectrum access in ad hoc networks: A POMDP framework

@article{Zhao2007DecentralizedCM,
  title={Decentralized cognitive MAC for opportunistic spectrum access in ad hoc networks: A POMDP framework},
  author={Qing Zhao and Lang Tong and Ananthram Swami and Yunxia Chen},
  journal={IEEE Journal on Selected Areas in Communications},
  year={2007},
  volume={25}
}
We propose decentralized cognitive MAC protocols that allow secondary users to independently search for spectrum opportunities without a central coordinator or a dedicated communication channel. Recognizing hardware and energy constraints, we assume that a secondary user may not be able to perform full-spectrum sensing or may not be willing to monitor the spectrum when it has no data to transmit. We develop an analytical framework for opportunistic spectrum access based on the theory of… 
Cross-Layer Design of Opportunistic Spectrum Access in the Presence of Sensing Error
TLDR
Two approaches to formulating opportunistic spectrum access in the presence of sensing error are proposed by considering either a constraint on the probability of colliding with primary users or a penalty imposed on each collision.
Probabilistic framework for opportunistic spectrum management in cognitive ad hoc networks
TLDR
This paper analytically formulate the cognitive user performance optimization problem as a mixed-integer non-linear programming to derive the optimal parameter values and uses packet-level simulations to show that their approach achieves up to 138% higher goodput with significantly better fairness characteristics compared to greedy approaches.
Optimal and Low-Complexity Algorithms for Dynamic Spectrum Access in Centralized Cognitive Radio Networks with Fading Channels
TLDR
A centralized spectrum sensing and Dynamic Spectrum Access scheme for secondary users (SUs) in a Cognitive Radio (CR) network is developed and a suboptimal sensing policy is obtained by using the Hungarian algorithm iteratively, which reduces the complexity of the channel assignment from an exponential to a polynomial order.
Optimal Myopic Sensing and Dynamic Spectrum Access in Cognitive Radio Networks with Low-Complexity Implementations
TLDR
This work considers a group of SU's with limited spectrum sensing capabilities working cooperatively to find primary channel spectrum holes to design the optimal sensing and access policies that maximize the total secondary throughput on primary channels accrued over time.
Opportunistic spectrum access over fading channels with collision constraints: A DEC-POMDP approach
TLDR
This paper investigates how cooperative cognitive radio users maximize their common utility functions through finite horizon in distributed manner by adapting a cooperative stochastic game, namely Decentralize Partially Observable Markov Decision Process to this framework which guarantees maximization of throughput over fading channel.
Distributed Sensing and Access in Cognitive Radio Networks
TLDR
This work considers an ad hoc network of secondary users searching for idle frequency bands in a spectrum consisting of multiple channels and proposes a suboptimal randomized sensing policy that effectively addresses this design tradeoff and offers significant improvement in network throughput over the optimal single-user design.
A Non-cooperative hierarchical Opportunistic Spectrum Access for cognitive radio networks
  • Oussama Habachi
  • Computer Science
    2013 IEEE Wireless Communications and Networking Conference (WCNC)
  • 2013
TLDR
A non-cooperative Opportunistic Spectrum Access (OSA) where Secondary Users (SUs) access opportunistically the spectrum licensed for Primary Users (PUs) in TV white spaces is considered, and a symmetric Nash equilibrium solution concept is proposed.
Opportunistic Channel-Aware Spectrum Access for Cognitive Radio Networks with Interleaved Transmission and Sensing
TLDR
This work jointly optimize the rate threshold and the packet transmission time to maximize the average throughput of SU, while limiting interference to PU, and sheds light on designing DOS protocols for cognitive radio with optimal transmission time that takes into account the dynamic nature of PUs.
MAC Protocols for Cognitive Radio Ad Hoc Networks: Sensing Error-Aware and Spectrum Access Strategies
TLDR
The authors propose a cognitive MAC protocol based on the theory of the Partially Observed Markov Decision Process (POMDP), which sense the radio spectrum, detect the occupancy state of different primary channels, and then opportunistically communicate over unused channels.
Distributed opportunistic spectrum access with imperfect spectrum sensing
TLDR
It is argued that a cross-layer approach that jointly controls PHY-layer spectrum sensing and MAC-layer random access achieves significant gain in the saturated throughput of CR network.
...
...

References

SHOWING 1-10 OF 26 REFERENCES
Distributed Cognitive MAC for Energy-Constrained Opportunistic Spectrum Access
TLDR
This work addresses the design of distributed cognitive medium access control protocols for opportunistic spectrum access (OSA) under an energy constraint on the secondary users and proposes a suboptimal solution to energy-constrained OSA, whose computational complexity can be systematically traded off with its performance.
Collaborative spectrum sensing for opportunistic access in fading environments
  • A. Ghasemi, E. Sousa
  • Computer Science
    First IEEE International Symposium on New Frontiers in Dynamic Spectrum Access Networks, 2005. DySPAN 2005.
  • 2005
TLDR
This paper studies spectrum-sharing between a primary licensee and a group of secondary users and suggests that collaboration may improve sensing performance significantly.
Joint Design and Separation Principle for Opportunistic Spectrum Access
TLDR
This paper develops optimal strategy for opportunistic spectrum access by integrating the design of spectrum sensor at the physical layer with that of spectrum sensing and access policies at the medium access control (MAC) layer, establishing a separation principle.
A bandwidth sharing approach to improve licensed spectrum utilization
TLDR
The AS-MAC is developed, an ad hoc SEC medium access control protocol to enable the interoperation of the PRI-SEC system, and performance evaluation results show that, in a single-hop ASN, theAS-MAC transparently utilizes 75% of the bandwidth left unused by the PRi, while, in multi-hop AsNs, due to spatial reuse, the AS- MAC can utilize up to 180% ofthe idle PRI resources.
Collaboration and fairness in opportunistic spectrum access
  • Haitao Zheng, Chunyi Peng
  • Computer Science, Physics
    IEEE International Conference on Communications, 2005. ICC 2005. 2005
  • 2005
TLDR
A network controlled spectrum access scheme where users behave collaboratively to optimize spectrum allocation for the entire network is proposed, and a graph-theoretical model is developed to characterize the spectrum access problem under a number of different optimization functions.
List-coloring based channel allocation for open-spectrum wireless networks
  • Wei Wang, Xin Liu
  • Computer Science
    VTC-2005-Fall. 2005 IEEE 62nd Vehicular Technology Conference, 2005.
  • 2005
TLDR
This paper focuses on the opportunistic exploration of the white space by users other than the primary licensed ones on a non-interfering or leasing basis and proposes several distributed algorithms to exploit the available channels for secondary users.
Detecting primary receivers for cognitive radio applications
  • B. Wild, K. Ramchandran
  • Business
    First IEEE International Symposium on New Frontiers in Dynamic Spectrum Access Networks, 2005. DySPAN 2005.
  • 2005
In this paper we develop a framework for competition of future operators likely to operate in a mixed commons/property-rights regime under the regulation of a spectrum policy server (SPS). The
Opportunistic use of radio-frequency spectrum: a network perspective
  • M. Steenstrup
  • Business, Computer Science
    First IEEE International Symposium on New Frontiers in Dynamic Spectrum Access Networks, 2005. DySPAN 2005.
  • 2005
We address opportunistic use of RF spectrum for communication among frequency-agile nodes composing a network, under the assumptions that the network and its environment are time-varying and users
Some Fundamental Limits on Cognitive Radio
TLDR
It is shown that in order to deliver real gains, cognitive radios must be able to detect undecodable signals, and that quantization combined with noise uncertainty can make the detection of signals by any detector absolutely impossible below a certain SNR threshold.
Implementation issues in spectrum sensing for cognitive radios
TLDR
To improve radio sensitivity of the sensing function through processing gain, three digital signal processing techniques are investigated: matched filtering, energy detection and cyclostationary feature detection.
...
...