Criterions of designing codebooks and a relay selection scheme for a relay network

2015 ◽  
Vol 29 (5) ◽  
pp. 977-991
Author(s):  
Haiquan Wang ◽  
Baofeng Zhao ◽  
Lei Hong
Keyword(s):  
Relay Selection ◽  
Relay Network ◽  
Selection Scheme

Relay Selection Scheme for AF Relay Network based on Cost Function Criterion

2013 ◽  
Vol 8 (10) ◽  
Author(s):  
Kanghee Lee ◽  
Hyuck M. Kwon ◽  
Wenhao Xiong ◽  
Hyunggi Kim ◽  
Inha Hyun
Keyword(s):  
Cost Function ◽  
Relay Selection ◽  
Relay Network ◽  
Selection Scheme ◽  
Af Relay

Energy-Efficient Joint Power Allocation and Relay Selection in Bit Error Rate Constrained Two-Way Relay Network

2015 ◽  
Vol 7 (4) ◽  
pp. 1-14
Author(s):  
Rashi Mehrotra ◽  
Ranjan Bose
Keyword(s):  
Power Consumption ◽  
Power Allocation ◽  
Bit Error Rate ◽  
Error Rate ◽  
Energy Efficient ◽  
Relay Selection ◽  
Relay Network ◽  
Transmit Power ◽  
Selection Scheme ◽  
Simulation Results

In this paper, the authors have proposed energy efficient power allocation and relay selection scheme in a two-way amplify-and-forward (AF) relay under bit error rate (BER) constrained network. They have derived an expression for the overall BER for Rayleigh fading channel. Based on minimum power consumption in the network, the authors have addressed the problem of power allocation by converting geometric programming to a convex optimization problem. A closed form solution of power allocation is found, which aims at minimizing total transmit power for the overall BER constrained network. The authors have evaluated minimum total transmit power for two-way AF relay network. Based on minimum total transmit power, a novel relay selection scheme has been proposed. Simulation results demonstrate that the proposed two-way power allocation and relay selection scheme can significantly minimize power consumption under BER constrained network as compared to the existing relay transmission. The proposed power allocation scheme gives 3 dBW gain than one-way relay transmission. The proposed relay selection method also outperforms the random relay selection by 24 dBW. The simulation results are corroborated with the analytical result

Relay Selection-aware Non-orthogonal Multiple Access Networks: Direct and Relaying Mode

2020 ◽  
Vol 13 (3) ◽  
pp. 348-354
Author(s):  
Dinh-Thuan Do ◽  
Minh-Sang V. Nguyen
Keyword(s):  
Relay Selection ◽  
Multiple Access ◽  
Decode And Forward ◽  
Selection Scheme ◽  
Fixed Power ◽  
Transmission Quality ◽  
Improved Performance ◽  
Outage Probabilities ◽  
Future Work ◽  
The Impact

Objective: In this paper, Decode-and-Forward (DF) mode is deployed in the Relay Selection (RS) scheme to provide better performance in cooperative downlink Non-orthogonal Multiple Access (NOMA) networks. In particular, evaluation regarding the impact of the number of multiple relays on outage performance is presented. Methods: As main parameter affecting cooperative NOMA performance, we consider the scenario of the fixed power allocations and the varying number of relays. In addition, the expressions of outage probabilities are the main metric to examine separated NOMA users. By matching related results between simulation and analytical methods, the exactness of derived formula can be verified. Results: The intuitive main results show that in such cooperative NOMA networks, the higher the number of relays equipped, the better the system performance can be achieved. Conclusion: DF mode is confirmed as a reasonable selection scheme to improve the transmission quality in NOMA. In future work, we will introduce new relay selections to achieve improved performance.

scholarly journals Buffer-Aided Successive Relay Selection Scheme for Energy Harvesting IoT Networks

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 36246-36258 ◽  
Author(s):  
Ghulam Shabbir ◽  
Jamil Ahmad ◽  
Waseem Raza ◽  
Yasar Amin ◽  
Adeel Akram ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Relay Selection ◽  
Selection Scheme
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