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1 Blockage and Directivity in 60 GHz Wireless Personal Area Networks: From Cross-Layer Model to Multihop MAC
| Citations: | 12 - 1 self |
BibTeX
@MISC{Singh_1blockage,
author = {Sumit Singh and Student Member and Federico Ziliotto and Upamanyu Madhow and Elizabeth M. Belding and Senior Member and Mark Rodwell},
title = {1 Blockage and Directivity in 60 GHz Wireless Personal Area Networks: From Cross-Layer Model to Multihop MAC},
year = {}
}
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Abstract
Abstract—We present a cross-layer modeling and design approach for multiGigabit indoor wireless personal area networks (WPANs) utilizing the unlicensed millimeter (mm) wave spectrum in the 60 GHz band. Our approach accounts for the following two characteristics that sharply distinguish mm wave networking from that at lower carrier frequencies. First, mm wave links are inherently directional: directivity is required to overcome the higher path loss at smaller wavelengths, and it is feasible with compact, low-cost circuit board antenna arrays. Second, indoor mm wave links are highly susceptible to blockage because of the limited ability to diffract around obstacles such as the human body and furniture. We develop a diffraction-based model to determine network link connectivity as a function of the locations of stationary and moving obstacles. For a centralized WPAN controlled by an access point, it is shown that multihop communication, with the introduction of a small number of relay nodes, is effective in maintaining network connectivity in scenarios where single-hop communication would suffer unacceptable outages. The proposed multihop MAC protocol accounts for the fact that every link in the WPAN is highly directional, and is shown, using packet level simulations, to maintain high network utilization with low overhead. Index Terms—Wireless personal area networks (WPAN), Millimeter wave WPANs, Millimeter wave propagation, 60 GHz networks, Medium Access Control (MAC). I.
Keyphrases
cross-layer model multihop mac ghz wireless personal area network medium access control carrier frequency centralized wpan high network utilization approach account network connectivity limited ability access point unacceptable outage low overhead path loss packet level simulation design approach human body unlicensed millimeter multihop communication distinguish mm relay node diffraction-based model network link connectivity small number single-hop communication indoor mm wave link ghz band low-cost circuit board antenna array cross-layer modeling multihop mac protocol account mm wave link ghz network
