NDLI: A novel link scheduling method based on CAZAC sequence for device-to-device communication system

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A novel link scheduling method based on CAZAC sequence for device-to-device communication system

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A novel link scheduling method based on CAZAC sequence for device-to-device communication system

Content Provider	ACM Digital Library
Author	Kang, Wi-Pil Hwang, Won-Jun Choi, Hyung-Jin
Abstract	In this paper, link scheduling process for device-to-device (D2D) communication system is presented, which is essentially performed in order to sense the interference condition and to decide whether each device performs the data transmission or not. Among the typical D2D communication systems, FlashLinQ developed by Qualcomm considers single-tone communication based link scheduling method. In this method, each link has a unique pair of sub-carriers, so the devices can easily estimate signal-to-interference power ratio (SIR) of links by calculating the ratio between received tone powers. In practical multi-path channel environment, however, the single-tone based SIR estimation causes a critical scheduling error problem because a wide difference between ideal full-band SIR and estimated SIR can occur due to the influence of frequency selective fading. In order to overcome this problem, we propose a novel link scheduling method based on constant-amplitude zero-auto-correlation (CAZAC) sequence for D2D communication system. In the proposed method, each link has a unique offset value set for the generation of circular shifted CAZAC sequences. The circular shifted CAZAC sequences are transmitted using multiple sub-blocks in the whole bandwidth, and then each device can obtain nearly full-band SIR using sub-band-wise circular cross correlation operation.
Starting Page	1
Ending Page	5
Page Count	5
File Format	PDF
ISBN	9781450319584
DOI	10.1145/2448556.2448650
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2013-01-17
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Device-to-device (d2d) Link scheduling Constant amplitude zero auto-correlation (cazac) Signal-to-interference ratio (sir)
Content Type	Text
Resource Type	Article

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