Title :
New Hierarchical Architecture for Ubiquitous Wireless Sensing and Access With Improved Coverage Using CWDM-ROF Links
Author :
Sun, Xiaoqiang ; Xu, Kun ; Shen, Xi ; Li, Yan ; Dai, Yitang ; Wu, Jian ; Lin, Jintong
Author_Institution :
State Key Lab. of Inf. Photonics & Opt. Commun., Beijing Univ. of Posts & Telecommun., Beijing, China
fDate :
10/1/2011 12:00:00 AM
Abstract :
A novel hierarchical architecture for hybrid wireless sensor and access networks has been proposed based on cost-effective radio-over-fiber (ROF) links with the coarse wavelength-division-multiplexing (CWDM) technique. Wireless fidelity (WiFi) signals are distributed to the remote radio units transparently over optical fibers in a star-shaped network topology. The wireless access traffic together with the perceiving usage scenarios including video monitoring and temperature sensing has been successfully demonstrated in the hybrid IEEE 802.11 and 802.15.4 networks. The transmission performance of the CWDM-ROF links is evaluated in terms of the error-vector magnitude (EVM) and data throughput for both uplinks and downlinks. The results show that the WiFi signals are successfully delivered through the CWDM-ROF links including a 4.5 km fiber and a 7 m wireless channel with a 3% EVM penalty. This CWDM-ROF technology can expand the application range of wireless sensor networks with the advantages of better capacity, larger coverage area, and lower investment on wired infrastructure.
Keywords :
IEEE standards; radio access networks; radio-over-fibre; telecommunication network topology; ubiquitous computing; wavelength division multiplexing; wireless sensor networks; CWDM-ROF links; IEEE 802.11 networks; IEEE 802.15.4 networks; WiFi; coarse wavelength-division-multiplexing; distance 7 m; error-vector magnitude; hybrid wireless sensor and access networks; optical fibers; radio-over-fiber links; remote radio units; size 4.5 km; star-shaped network topology; temperature sensing; ubiquitous wireless access; ubiquitous wireless sensing; video monitoring; wireless access traffic; wireless channel; wreless fidelity; IEEE 802.11 Standards; Optical mixing; Optical sensors; Throughput; Transceivers; Wireless communication; Wireless sensor networks; Coarse wavelength-division-multiplexing; Radio-over-fiber; Wireless local area network; Wireless sensor network;
Journal_Title :
Optical Communications and Networking, IEEE/OSA Journal of
DOI :
10.1364/JOCN.3.000790
