Device-to-Device Communications Underlaying an Uplink SCMA System

Device-to-device (D2D) communication has been a potential solution to improve spectral efficiency of cellular systems due to frequency resource sharing. This paper considers D2D communications underlaying an uplink cellular system enabling sparse code multiple access (SCMA) technology, where the bas...

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Vydáno v:IEEE access Ročník 7; s. 21756 - 21768
Hlavní autoři: Kim, Hyeon Min, Nguyen, Hieu V., Kang, Gil-Mo, Shin, Yoan, Shin, Oh-Soon
Médium: Journal Article
Jazyk:angličtina
Vydáno: Piscataway IEEE 2019
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Témata:
Algorithms
Approximation
Approximation algorithms
Communications systems
Computational geometry
Convexity
Device-to-device (D2D)
Device-to-device communication
Heuristic methods
heuristic search
inner approximation
Interference
Lower bounds
Mathematical programming
Mixed integer
NOMA
Operations research
power allocation
Quality of service
Resource allocation
Resource management
sparse code multiple access (SCMA)
spectral efficiency
Uplink
ISSN:2169-3536, 2169-3536
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Abstract Device-to-device (D2D) communication has been a potential solution to improve spectral efficiency of cellular systems due to frequency resource sharing. This paper considers D2D communications underlaying an uplink cellular system enabling sparse code multiple access (SCMA) technology, where the base station (BS) can decode the signals of cellular users without mutual interference. The demands for high data rate as well as low latency in massive connectivity is the main challenging requirement in D2D communications, along with ensuring the quality of service (QoS) for the on-running cellular user equipment (CUEs). To tackle the problem, the BS is designed to first assigns the codewords in a codebook to CUEs based on the lower bound of the achievable CUE rates, so that the sum rate (SR) of CUEs is maximized. With the usage of mutual-interference suppression in the SCMA-enabled system, the BS then attempts to maximize the SR of D2Ds in a transmission block through a joint power and resource allocation subject to the QoS requirements for both CUEs and D2Ds. This task is formulated as a mixed-integer non-convex programming. We propose a low-complexity two-phase algorithm of joint heuristic and inner approximation method to efficiently solve the problem. The numerical results verify that the codebook assignment problem based on the lower bound of SR is easily solved, and the proposed algorithm to maximize the SR of D2Ds outperforms existing methods.
AbstractList Device-to-device (D2D) communication has been a potential solution to improve spectral efficiency of cellular systems due to frequency resource sharing. This paper considers D2D communications underlaying an uplink cellular system enabling sparse code multiple access (SCMA) technology, where the base station (BS) can decode the signals of cellular users without mutual interference. The demands for high data rate as well as low latency in massive connectivity is the main challenging requirement in D2D communications, along with ensuring the quality of service (QoS) for the on-running cellular user equipment (CUEs). To tackle the problem, the BS is designed to first assigns the codewords in a codebook to CUEs based on the lower bound of the achievable CUE rates, so that the sum rate (SR) of CUEs is maximized. With the usage of mutual-interference suppression in the SCMA-enabled system, the BS then attempts to maximize the SR of D2Ds in a transmission block through a joint power and resource allocation subject to the QoS requirements for both CUEs and D2Ds. This task is formulated as a mixed-integer non-convex programming. We propose a low-complexity two-phase algorithm of joint heuristic and inner approximation method to efficiently solve the problem. The numerical results verify that the codebook assignment problem based on the lower bound of SR is easily solved, and the proposed algorithm to maximize the SR of D2Ds outperforms existing methods.
Author Kim, Hyeon Min
Shin, Oh-Soon
Shin, Yoan
Nguyen, Hieu V.
Kang, Gil-Mo
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SubjectTerms Algorithms
Approximation
Approximation algorithms
Communications systems
Computational geometry
Convexity
Device-to-device (D2D)
Device-to-device communication
Heuristic methods
heuristic search
inner approximation
Interference
Lower bounds
Mathematical programming
Mixed integer
NOMA
Operations research
power allocation
Quality of service
Resource allocation
Resource management
sparse code multiple access (SCMA)
spectral efficiency
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Title Device-to-Device Communications Underlaying an Uplink SCMA System
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