QoS-aware Opportunistic Routing with Directional Antennas in Cognitive Radio Sensor Networks

6th Annual 2018 International Conference on Geo-Spatial Knowledge and Intelligence

Wang, Lu^1 ; Shen, Hang^1^2 ; Bai, Guangwei^1 ; Wang, Tianjing^1 ; Lingli, Li^1

College of Computer Science and Technology, Nanjing Tech University, Nanjing

211816, China^1

Department of Electrical and Computer Engineering, University of Waterloo, Waterloo

N2L 3G1, Canada^2

关键词: Channel parameter;    Directional Antenna;    Energy-efficient design;    Joint optimization;    Multiple antenna;    Opportunistic routing;    Optimal solutions;    Transmission channels;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/234/1/012111/pdf
DOI  :  10.1088/1755-1315/234/1/012111

来源: IOP

【 摘 要 】

In this paper, a directional antenna based opportunistic routing (DAOR) scheme is proposed for cognitive radio sensor networks (CRSNs) with QoS assurances and energy efficient design. Specifically, based on the investigation and understanding about how directional antenna operation affects spectrum access and route selection, a joint optimization problem is formulated. After dividing angular domain into multiple antenna sectors with fixed beamwidth and direction, an approximate strategy is presented to determine the antenna sector and transmission channel. With obtained antenna and channel parameters, a heuristic algorithm is further designed to construct prioritized permutation of forwarding candidates, aimed at reducing computational complexity while approaching the optimal solution. Simulation results demonstrate that DAOR outperforms existing QoS routing schemes in terms of QoS provisioning and energy efficiency.