Research Article
On the Coexistence of Infrastructure-Based and Ad Hoc Connections for a Cognitive Radio System
@INPROCEEDINGS{10.1109/CROWNCOM.2006.363449, author={Li-Chun Wang and Anderson Chen}, title={On the Coexistence of Infrastructure-Based and Ad Hoc Connections for a Cognitive Radio System}, proceedings={1st International ICST Conference on Cognitive Radio Oriented Wireless Networks and Communications}, publisher={IEEE}, proceedings_a={CROWNCOM}, year={2007}, month={5}, keywords={Chromium Cognitive radio Intelligent networks Joining processes Media Access Protocol Peer to peer computing Performance analysis Physical layer Switches Throughput}, doi={10.1109/CROWNCOM.2006.363449} }- Li-Chun Wang
Anderson Chen
Year: 2007
On the Coexistence of Infrastructure-Based and Ad Hoc Connections for a Cognitive Radio System
CROWNCOM
IEEE
DOI: 10.1109/CROWNCOM.2006.363449
Abstract
Cognitive radio (CR) can sense the current spectrum usage of existing networks and make intelligent decisions on the opportunity of reusing the frequency spectrum. One fundamental issue for the CR system is how to rapidly establish a temporary communication link on the spectrum of the exiting users. In this paper, we investigate the feasibility issue of establishing both an infrastructure-based link and an ad hoc link using the same spectrum simultaneously in an overlapped area. We also present a cross-layer performance analysis from both the physical (PHY) layer and medium access control (MAC) layer perspectives. The analytical results show that the probability that both an infrastructure-based connection and an ad hoc link coexist in an overlapping area can be as high as 45%. In addition the normalized total throughput of the both links is more than 145% compared to the pure infrastructure-based link. However, considering the shadowing effects, the transmission reliability varies from 30% ~ 90% depending on the locations of mobile stations
