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

Zhang, Guopeng; Yang, Kun; Wu, Shuanshuan; Mei, Xiaoyong; Zhen, Zhao

doi:10.1007/s11276-015-0920-5

Cited by 10 publications

(11 citation statements)

References 18 publications

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“…Guo and Zhang study the performance of D2D uplink relay in situations where one user of a D2D pair is in outage [5]. Cellular downlink communication is considered in [19], which proposes a cooperative relay-based D2D scheme to improve the achievable download rate under sum-power constraints. A D2D-enhanced conventional multicast scheme is proposed by Militano et al The proposed scheme makes use of D2D capability and supports high-rate modulation and coding schemes on the downlink from the cellular BS to forwarding devices.…”

Section: Related Workmentioning

confidence: 99%

Network coding schemes for D2D communications based relaying for cellular coverage extension

Abrardo

Fodor

Tola

2015

Trans. Emerging Tel. Tech.

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Althoughnetwork-assisted device-to-device (D2D) communications are known to improve the spectral and energy\ud efficiency of proximal communications, the performance of cooperative D2D schemes in licenced spectrum is less understood\ud when employed to extend the coverage of cellular networks. In this paper, we study the performance of D2D-based\ud range extension in terms of sum rate and power efficiency when a relaying user equipment (UE) helps to improve the coverage\ud for cell edge UEs. In our design, the relaying UE may have own traffic to transmit and receive to/from the cellular\ud base station (BS) and can operate either in amplify-and-forward (AF) or decode-and-forward (DF) modes and can make\ud use of either digital or analogue physical (PHY) layer network coding. In this rather general setting, we propose mode\ud selection, resource allocation and power control schemes and study their performance by means of system simulations.\ud We find that the performance of the DF scheme with network coding is superior both to the traditional cellular and the\ud AF-based relaying schemes, including AF with two-slot or three-slot PHY layer network codin

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Section: Related Workmentioning

confidence: 99%

Network coding schemes for D2D communications based relaying for cellular coverage extension

Abrardo

Fodor

Tola

2015

Trans. Emerging Tel. Tech.

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“…In short, both D2D links and cellular links can be benefited in this scheme. A half-duplex relaying based D2D communication scheme is proposed in [9], and a power allocation problem is investigated to maximize the achievable rates of D2D link under the constraints on rate requirement of cellular link. In [10], a full-duplex relaying based D2D communication scheme is proposed and the optimal power allocation at the base station and D2D transmitter are derived in closed-form to maximize the achievable transmit rate of D2D link while guaranteeing the QoS of cellular user.…”

Section: Introductionmentioning

confidence: 99%

“…In [10], a full-duplex relaying based D2D communication scheme is proposed and the optimal power allocation at the base station and D2D transmitter are derived in closed-form to maximize the achievable transmit rate of D2D link while guaranteeing the QoS of cellular user. In [9] and [10], D2D transmitter forward signals to cellular user and transmit its own signals to D2D receiver simultaneously. Cellular user and D2D receiver access the channel at the same time and each receives its desired signals while treats other user's signal as interference.…”

Section: Introductionmentioning

confidence: 99%

“…Considering performance improvement achieved by NOMA, in this paper we exploit NOMA technique in full-duplex relaying based D2D communications and propose a novel full-duplex NOMA relaying based D2D communication scheme, in which a full-duplex D2D transmitter not only performs direct communication with D2D receiver, but also acts as a full-duplex relay for cellular user. Different from schemes proposed in [9] and [10], the D2D transmitter sends signals to D2D receiver and cellular user in NOMA scheme. Different from [20], the D2D transmitter not only forward data to cellular user, but also has its own data to send.…”

Section: Introductionmentioning

confidence: 99%

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Power allocation for full-duplex NOMA relaying based underlay D2D communications

2019

KSII TIIS

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In this paper, a full-duplex NOMA relaying based underlay device-to-device (D2D) communication scheme is proposed, in which D2D transmitter assists cellular downlink transmission as a full-duplex relay. Specifically, D2D transmitter receives signals from base station and transmits the superposition signals to D2D receiver and cellular user in NOMA scheme simultaneously. Furthermore, we investigate the power allocation under the proposed scheme, aiming to maximize D2D link's achievable transmit rate under cellular link's transmit rate constraint and total power constraint. To tackle the power allocation problem, we first propose a power allocation method based on linear fractional programming. In addition, we derive closed-form expressions of the optimal transmit power for base station and D2D transmitter. Simulation results show that the performance of two solutions matches well and the proposed full-duplex NOMA relaying based underlay D2D communication scheme outperforms existing full-duplex relaying based D2D communication scheme.

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“…The disadvantage of HD mode is that spectral efficiency and energy efficiency are low [20]. Therefore, as a substitute for the HD mode, the FD relay forwarding method can improve both spectral efficiency and energy efficiency by being able to simultaneously transmit and receive signals [21].…”

Section: Introductionmentioning

confidence: 99%

Power Allocation for Half-duplex Relay-based D2D Communication with QoS guarantee

2019

KSII TIIS

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In the traditional cellular network communication, the cellular user and the base station exchange information through the uplink channel and downlink channel. Meanwhile, device-to-device (D2D) users access the cellular network by reusing the channel resources of the cellular users. However, when cellular user channel conditions are poor, not only D2D user cannot reuse its channel resources to access the network, but also cellular user's communication needs cannot be met. To solve this problem, we introduced a novelty D2D communication mechanism in the downlink, which D2D transmitter users as half-duplex (HD) relays to assist the downlink transmission of cellular users with reusing corresponding spectrum. The optimization goal of the system is to make the cellular users in the bad channel state meet the minimum transmission rate requirement and at the same time maximize the throughput of the D2D users. In addition, i for the purpose of improving the efficiency of relay transmission, we use two-antenna architecture of D2D relay to enable receive and transmit signals at the same time. Then we optimized power of base station and D2D relay separately with consideration of backhaul interference caused by two-antenna architectures. The simulation results show that the proposed HD relay strategyis superior to existing HD and full-duplex (FD) models in the aspects of system throughput and power efficiency.

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

Cited by 10 publications

References 18 publications

Network coding schemes for D2D communications based relaying for cellular coverage extension

Network coding schemes for D2D communications based relaying for cellular coverage extension

Power allocation for full-duplex NOMA relaying based underlay D2D communications

Power Allocation for Half-duplex Relay-based D2D Communication with QoS guarantee

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