scholarly journals The SS-SCR Scheme for Dynamic Spectrum Access

2012 ◽  
Vol 2012 ◽  
pp. 1-12
Author(s):  
Vinay Thumar ◽  
Taskeen Nadkar ◽  
U. B. Desai ◽  
S. N. Merchant
Keyword(s):  
Dynamic Spectrum Access ◽  
Optimization Problem ◽  
Activity Patterns ◽  
Cooperative Relaying ◽  
Dynamic Spectrum ◽  
Cross Layer ◽  
Spectrum Access ◽  
Cross Layer Optimization ◽  
Simulation Results ◽  
Symbiotic Cooperative Relaying

We integrate the two models ofCognitive Radio (CR), namely, the conventionalSense-and-Scavenge (SS) Model and Symbiotic Cooperative Relaying (SCR). The resultant scheme, calledSS-SCR, improves the efficiency of spectrum usage and reliability of the transmission links.SS-SCRis enabled by a suitable cross-layer optimization problem in a multihop multichannel CR network. Its performance is compared for different PU activity patterns with those schemes which considerSSandSCRseparately and perform disjoint resource allocation. Simulation results depict the effectiveness of the proposedSS-SCRscheme. We also indicate the usefulness of cloud computing for a practical deployment of the scheme.

Dynamic Spectrum Access Considering Channel Fading in Cognitive Networks

2014 ◽  
Vol 543-547 ◽  
pp. 2013-2016
Author(s):  
Ye Bin Tao ◽  
Shi Ding Zhu
Keyword(s):  
Dynamic Spectrum Access ◽  
Cognitive Networks ◽  
Dynamic Spectrum ◽  
Time Varying ◽  
Channel Fading ◽  
Spectrum Access ◽  
Throughput Performance ◽  
Markov Decision ◽  
Simulation Results ◽  
Partially Observable

This paper investigated the method of Dynamic Spectrum Access (DSA) in cognitive networks, considering the PU channels both time-varying and fading. We used the Partially Observable Markov Decision Process (POMDP) framework to model this problem and designed a greedy strategy. The simulation results shows that the proposed strategy obtained better throughput performance than the existing works.

The Research of WSN Architecture for Smart Grid Utility

2012 ◽  
Vol 546-547 ◽  
pp. 266-271
Author(s):  
Yi Peng ◽  
Guoie Huang ◽  
Hua Long ◽  
Qing Zhi Du ◽  
Tao Xie
Keyword(s):  
Wireless Sensor Networks ◽  
Cognitive Radio ◽  
Smart Grid ◽  
Dynamic Spectrum Access ◽  
Dynamic Spectrum ◽  
The Other ◽  
Wireless Sensor ◽  
Cross Layer ◽  
Propagation Characteristics ◽  
Spectrum Access

WSN (Wireless Sensor Networks) has been considered as one of the very promising technologies for the implementation of smart grid (SG). On the other hand, with recent advances in Cognitive Radio (CR) technology, it is possible to apply the Dynamic Spectrum Access (DSA) model in WSN to get access to less congested spectrum, possibly with better propagation characteristics. In this paper we investigate the application of WSN in smart grid and the structure of traditional WSN etc. For smart grid utility, a novel environment-adaptive and cross-layer architecture of CR-based WSN is proposed. Furthermore, the design methods, general characteristics and functions of every layer or every module are described and discussed.

Dynamic Spectrum Access to the Combined Resource of Commercial and Public Safety Bands Based on a WCDMA Shared Network

2009 ◽  
Vol E92-B (12) ◽  
pp. 3581-3585
Author(s):  
Hyoungsuk JEON ◽  
Sooyeol IM ◽  
Youmin KIM ◽  
Seunghee KIM ◽  
Jinup KIM ◽  
...  
Keyword(s):  
Public Safety ◽  
Dynamic Spectrum Access ◽  
Dynamic Spectrum ◽  
Spectrum Access ◽  
Shared Network
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