A Non-Orthogonal Multiple Access based Relaying Scheme for Cellular Two-Way Relay Networks

Fang, Zhaoxi; Lu, Yingzhi; Shi, Jiong; Jin, Liping; Ji, Jiansuo

doi:10.1145/3322645.3322647

Cited by 4 publications

(8 citation statements)

References 6 publications

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“…It is assumed that the channels remain unchanged during each round of transmission. The channel between the BS and the relay, and that between user and the relay are denoted by ℎ and ℎ , , = 1,2, respectively.We also assume that the BS and the relay have perfect knowledge of all the channels as assumed in [18]- [23]. Note that in practical systems, the BS can obtain the channel state information between the relay and the two users via channel feedback from the relay.…”

Section: The Proposed Twr-noma-nc Schemementioning

confidence: 99%

“…The sum-rate bound in ( 20) is also shown in the figure. The sum-rate performance of the TDMA-based TWR NOMA scheme proposed in [23] (labeled as "TWR-NOMA scheme") and the NOMA-based one-way relaying scheme in [24] (labeled as "OWR-NOMA scheme") are also shown in the figure. Note that the OWR-NOMA scheme proposed in [24] was designed for the downlink transmission only.…”

Section: Computer Simulationmentioning

confidence: 99%

“…Among all these three schemes, the OWR-NOMA scheme achieves the worst performance. This is due to the fact that in the downlink transmission in OWR-NOMA, the achievable data Sum-Rates (bps/Hz) TWR-NOMA scheme [23] OWR-NOMA scheme [24] Proposed scheme, simulation Proposed scheme, upper bound rate of user 1 is limited by the power allocation factors at the BS.…”

Section: Computer Simulationmentioning

confidence: 99%

“…1, there exist four data streams in each round of transmission, i.e., two downlink data streams from the BS to the two users via the RS, and two uplink data streams from the two users to the BS via the RS. Existing schemes, such as those in [23] [24], requires at least four time slots to complete each round of transmission due to the half-duplex mode of the relay.…”

Section: Introductionmentioning

confidence: 99%

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Sum-Rate Performance of A NOMA-based Two-Way Relay Approach for A Two-User Cellular Network

Li¹

2021

KSII TIIS

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This paper considers a cellular two-way relay network with one base station (BS), one relay station (RS), and two users. The two users are far from the BS and no direct links exist, and the two users exchange messages with the BS via the RS. A non-orthogonal multiple access (NOMA) and network coding (NC)-based decode-and-forward (DF) two-way relaying (TWR) scheme TWR-NOMA-NC is proposed, which is able to reduce the number of channel-uses to three from four in conventional time-division multiple access (TDMA) based TWR approaches. The achievable sum-rate performance of the proposed approach is analyzed, and a closed-form expression for the sum-rate upper bound is derived. Numerical results show that the analytical sum-rate upper bound is tight, and the proposed TWR-NOMA-NC scheme significantly outperforms the TDMA-based TWR and NOMA-based one-way relaying counterparts.

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Section: The Proposed Twr-noma-nc Schemementioning

confidence: 99%

Section: Computer Simulationmentioning

confidence: 99%

Section: Computer Simulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Sum-Rate Performance of A NOMA-based Two-Way Relay Approach for A Two-User Cellular Network

Li¹

2021

KSII TIIS

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“…Compared with conventional one-way relay-based CNOMA (OW-CNOMA) and OMA, works in [15] confirmed higher SE gain and a lower amount of required time slots. A power allocation scheme maximizing the achievable sum-rate was proposed in [16], where a relay node provides the ability to allow multiple FUs' DL and UL transmissions in the TW-CNOMA scheme. Do and Van Nguyen studied NOMA systems with an AF/DF-aided BS-assisting communication from a wireless powered device to a nonenergy harvesting device, where two devices have distinct predefined QoS requirements [17].…”

Section: Introductionmentioning

confidence: 99%

Two-Way Transmission for Low-Latency and High-Reliability 5G Cellular V2X Communications

Nguyen

et al. 2020

Sensors

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As one of key technologies of future networks, vehicle-to-everything (V2X) communication has recently been proposed to improve conventional vehicle systems in terms of traffic and communications. Main benefits of using V2X are efficient and safe traffic as well as low-latency communications and reliable massive connections. Non-orthogonal multiple access (NOMA) scheme was introduced as a promising solution in the fifth-generation (5G) mobile communications, by which quality-of-service (QoS) requirements of many 5G-enabled applications are satisfied as a result of improved network throughput and lower accessing and transmission latency. In this paper, we study NOMA-based communications between vehicles equipped with multiple antennas over Nakagami-m fading channels in V2X networks, in which uplink and downlink transmission between two vehicles with upper controller are supported by a road side unit (RSU) to increase the capacity rather than simply be connected to the base station. In the NOMA-V2X system under study, the outage probability depends on the power allocation factor of RSU transmission and the operation of successive interference cancellation (SIC) at vehicles. Analyses and simulations verify that the outage performance of NOMA-V2X system are mainly affected by fading parameters, levels of imperfect SIC, and power allocation factors.

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Joint Power and Time Allocation for Two-Way Cooperative NOMA

Bae

Han

2019

IEEE Trans. Veh. Technol.

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A Non-Orthogonal Multiple Access based Relaying Scheme for Cellular Two-Way Relay Networks

Cited by 4 publications

References 6 publications

Sum-Rate Performance of A NOMA-based Two-Way Relay Approach for A Two-User Cellular Network

Sum-Rate Performance of A NOMA-based Two-Way Relay Approach for A Two-User Cellular Network

Two-Way Transmission for Low-Latency and High-Reliability 5G Cellular V2X Communications

Joint Power and Time Allocation for Two-Way Cooperative NOMA

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