On the Achievable User Number of the Downlinks in Cellular-Based Machine-to-Machine Communications
Joint Authors
Li, Yingbo
Bai, Lin
Chen, Chen
Jin, Ye
Source
International Journal of Distributed Sensor Networks
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-09-23
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Telecommunications Engineering
Information Technology and Computer Science
Abstract EN
In cellular-based machine-to-machine (M2M) networks, supporting large number of machine-type communications (MTC) users (devices) has become a critical challenge in both the uplink and downlink channels.
In this paper, we focus on the downlink beamforming using zero-forcing dirty paper coding (DPC).
In order to characterize the system’s ability of user admission, we consider the achievable user number, which is defined as the number of users whose signal-to-interference plus-noise ratios exceed a target threshold.
Due to the complexity of the optimal scheme, we propose two algorithms with random user scheduling and greedy user scheduling in maximizing the achievable user number by dynamical power assignment.
Using the joint distribution of effective channel gains, we derive the achievable user number of both the scheduling schemes.
An upper bound on the achievable user number of the greedy scheme is then derived which is shown to be tight when there are a large number of users.
From numerical results, we show that both of the schemes enjoy a linear increase in the achievable user number as the number of transmitter antennas increases.
The performance of the greedy scheduling scheme is close to the optimal scheduling scheme.
American Psychological Association (APA)
Li, Yingbo& Chen, Chen& Bai, Lin& Jin, Ye. 2012. On the Achievable User Number of the Downlinks in Cellular-Based Machine-to-Machine Communications. International Journal of Distributed Sensor Networks،Vol. 2012, no. 2012, pp.1-11.
https://search.emarefa.net/detail/BIM-492752
Modern Language Association (MLA)
Li, Yingbo…[et al.]. On the Achievable User Number of the Downlinks in Cellular-Based Machine-to-Machine Communications. International Journal of Distributed Sensor Networks No. 2012 (2012), pp.1-11.
https://search.emarefa.net/detail/BIM-492752
American Medical Association (AMA)
Li, Yingbo& Chen, Chen& Bai, Lin& Jin, Ye. On the Achievable User Number of the Downlinks in Cellular-Based Machine-to-Machine Communications. International Journal of Distributed Sensor Networks. 2012. Vol. 2012, no. 2012, pp.1-11.
https://search.emarefa.net/detail/BIM-492752
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-492752