NDLI: Exploiting buffers in cognitive multi-relay systems for delay-sensitive applications

Content Provider	IEEE Xplore Digital Library
Author	Yan Chen Lau, V.K.N. Shunqing Zhang Peiliang Qiu
Copyright Year	2009
Description	Author affiliation: Institute of Information and Communication Engineering, Zhejiang University, Hangzhou, China (Yan Chen; Peiliang Qiu) \|\| Department of Electronic and Computer Engineering, Hong Kong University of Science and Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong (Lau, V.K.N.; Shunqing Zhang)
Abstract	Cognitive and cooperative technologies are two core components in the design of next generation wireless networks. One key issue associated with cognitive transmission is the inefficient spectrum sharing of the secondary system, especially for secondary communications separated by long distance. To boost the spectrum sharing efficiency, cognitive multi-relay system appears to be an attractive solution for the cognitive transmission systems. In this paper, we consider a cognitive multi-relay (CMR) system and propose a novel CMR buffered decode-and-forward protocol that exploit the buffers in the source and each relay node. Moreover, we derive the closed-form average end-to-end delay and the stability region by exploiting the birth-death nature of the queue dynamics and the methods of state aggregation and queue dominance. Comparing with the baseline protocols through analytical and numerical results, the proposed CMR-BDF scheme can dynamically adjust the cognitive transmission to exploit the spatial PU burstiness while simultaneously benefits from the advantage of double-sided selection diversity in both the source-relay and relay-destination interfaces.
Starting Page	1
Ending Page	8
File Size	7570148
Page Count	8
File Format	PDF
ISBN	9781424449194
DOI	10.1109/WIOPT.2009.5291602
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-06-23
Publisher Place	South Korea
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Protocols Stability Delay systems Physical layer Decoding Cognitive radio stability/delay analysis Relays Next generation networking PU burstiness Wireless networks Chromium cognitive multi-relay system (CMR) buffered decode-and-forward (BDF)
Content Type	Text
Resource Type	Article

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