NDLI: Coordinated dual-layer beamforming for public safety network: Architecture and algorithms

Content Provider	IEEE Xplore Digital Library
Author	Kai Yang Calin, D. Kaya, A.O. Yiu, S.
Copyright Year	2012
Description	Author affiliation: Bell Laboratories, Alcatel Lucent (Kai Yang; Calin, D.; Kaya, A.O.; Yiu, S.)
Abstract	The revolutionary success of commercial broadband wireless network has spurred significant interest in employing related technologies such as 3GPP long term evolution (LTE) technologies to build a nationwide mobile broadband network for public safety entities. The successful deployment and operation of a public safety network, however, are more challenging than the traditional commercial wireless networks due to the high reliability and security requirements, unpredictable traffic patterns, and fast time-varying user population density. In this paper, we propose a framework of coordinated dual-layer beamforming schemes to address these challenges. The distinct features of the proposed systems are detailed and the architecture and realization are discussed. While a smart antenna is capable of forming multiple beams, it is unlikely to activate all of them simultaneously. We thus develop efficient beam scheduling algorithms that could adapt to the time-varying channel conditions and traffic loads by adaptively adjusting the beam switching sequence. We also reveal that the coordinated dual-layer beamforming technologie not only has the potential of significantly enhancing the system capacity, but also can turn a NP-complete beam scheduling problem into a problem that can be easily solved if network MIMO technologies are employed. It is seen through simulation studies that the proposed schemes could offer multi-fold capacity improvements over more traditional systems equipped with broader antenna patterns (e.g., omnidirectional). Also, while we focus on public safety network in this paper, the proposed coordinated dual-layer beamforming framework can be equally applied to provide mobile access to any hotspot area with dense mobile users, e.g., a conference room or a stadium.
Starting Page	4095
Ending Page	4099
File Size	546877
Page Count	5
File Format	PDF
ISBN	9781457720529
ISSN	15503607
e-ISBN	9781457720536
e-ISBN	9781457720512
DOI	10.1109/ICC.2012.6364651
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-06-10
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Array signal processing Interference Safety Antennas Wireless networks Throughput
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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