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Wireless Networks
Erschienen in: Wireless Networks 7/2015

01.10.2015

Efficient power control for half-duplex relay based D2D networks under sum power constraints

verfasst von: Guopeng Zhang, Kun Yang, Shuanshuan Wu, Xiaoyong Mei, Zhikai Zhao

Erschienen in: Wireless Networks | Ausgabe 7/2015

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Abstract

Device-to-device (D2D) communications provide an effective way to improve local services in cellular networks which allow close-by users to communicate directly. Considering cooperative relay (CR) can achieve high spectrum and energy efficiency, this paper proposes a novel CR-based D2D communication scheme, referred to as CR-D2D, which allows a D2D link to underlay a cellular downlink by assigning a D2D transmitter as a half-duplex relay to assist cellular downlink communication. To maximize the achievable rates of D2D users and meanwhile to meet the minimum rate requirements of cellular users, transmission powers allocated to the base station (BS) and to the D2D transmitter are both optimized under the sum power constraint, while existing works usually perform the optimization at the BS and at the D2D transmitter independently. The simulation results show that the proposed CR-D2D scheme outperforms traditional cellular communication scheme in system throughput and in spectrum utilization efficiency.
Vorheriger Artikel Cognitive forwarding control in wireless ad-hoc networks with slow fading channels
Nächster Artikel SEER: spectrum- and energy-efficient routing protocol for cognitive radio ad hoc networks

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Fußnoten
1
The hop gain refers to using a single-hop link in D2D communication scheme rather than using an uplink and a downlink resource of a BS as in traditional cellular communication scheme.
 
2
For example, if UE2 with a VBR traffic were provided higher data rate, the user could watch a high-definition video program instead of a standard-definition one.
 
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Metadaten
Titel
Efficient power control for half-duplex relay based D2D networks under sum power constraints
verfasst von
Guopeng Zhang
Kun Yang
Shuanshuan Wu
Xiaoyong Mei
Zhikai Zhao
Publikationsdatum
01.10.2015
Verlag
Springer US
Erschienen in
Wireless Networks / Ausgabe 7/2015
Print ISSN: 1022-0038
Elektronische ISSN: 1572-8196
DOI
https://doi.org/10.1007/s11276-015-0920-5

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