Paper Info
Title
A novel link scheduling method based on CAZAC sequence for device-to-device communication system
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.
Year
DOI
Venue
2013
10.1145/2448556.2448650
ICUIMC
Keywords
Field
DocType
critical scheduling error problem,full-band sir,novel link scheduling method,sir estimation,device-to-device communication system,link scheduling method,link scheduling process,cazac sequence,communication system,d2d communication system
Telecommunications,Data transmission,Computer science,Fading,Scheduling (computing),Communications system,Algorithm,Communication channel,Real-time computing,Bandwidth (signal processing),Interference (wave propagation),Offset (computer science)
Conference
Citations 
PageRank 
References 
0
0.34
3
Authors
3
Name
Order
Citations
PageRank
Wipil Kang141.09
Wonjun Hwang217418.82
Hyung-Jin Choi326440.12