Power Allocation Scheme to Achieve Fair User Data Rates in NOMA Systems

2019 ◽  
Author(s):  
In-Ho Lee
Keyword(s):  
Power Allocation ◽  
Allocation Scheme ◽  
Data Rates ◽  
User Data

scholarly journals Hybrid OFDMA Resource Allocation Scheme for Ensuring Required Level of Proportional Fairness

2020 ◽  
Vol 2020 ◽  
pp. 1-19
Author(s):  
Ming Sun ◽  
Kangle Zhai ◽  
Wei Cao ◽  
Ying Wang ◽  
Yaoqun Xu
Keyword(s):  
Resource Allocation ◽  
Power Allocation ◽  
Complexity Analysis ◽  
Proportional Fairness ◽  
Subcarrier Allocation ◽  
Allocation Scheme ◽  
Greedy Method ◽  
Hungarian Algorithm ◽  
Data Rates ◽  
Resource Allocation Scheme

The new-generation wireless communication networks are envisioned to offer higher sum data rates along with the required level of fairness. Previous works tend to suffer from a decayed performance as subcarriers become relatively insufficient in allocation to users. To maximize the sum data rates and ensure the required level of proportional fairness, this paper presents a hybrid OFDMA resource allocation scheme which uses Hungarian algorithm combined with a greedy method for subcarrier allocation and uses bee colony optimization for power allocation. The proposed subcarrier allocation scheme can make full use of advantages of both globally optimal Hungarian algorithm in enhancing sum data rates and locally optimal greedy method in maintaining a reasonable fairness level and can make Hungarian algorithm work in a searching mode for further improvement of sum data rates and fairness. The proposed power allocation scheme can converge to the required level of proportional fairness but with higher sum data rates if the subcarrier allocation does not achieve the required fairness. Simulation results show that the proposed scheme can obtain the required level of proportional fairness but with higher sum data rates even if subcarriers are relatively insufficient in allocation to users. Complexity analysis shows the proposed method has moderate complexity.

Dynamic Subcarrier and Power Allocation Based on Nash Bargaining Solution in Symmetric Cooperative OFDMA Networks

2011 ◽  
Vol 187 ◽  
pp. 510-515
Author(s):  
Wei Liu ◽  
Jing Min Tang
Keyword(s):  
Power Allocation ◽  
Nash Bargaining Solution ◽  
Nash Bargaining ◽  
Bargaining Solution ◽  
Subcarrier Allocation ◽  
Allocation Scheme ◽  
Allocation Algorithm ◽  
Cooperative Scheme ◽  
Joint Resource Allocation ◽  
Adaptive Power

In this paper, subcarrier and power allocation are jointly considered in a three-node symmetric cooperation orthogonal frequency-division multiple access uplink system. With the help of Nash bargaining solution, the dynamic subcarrier allocation scheme and the adaptive power allocation scheme are proposed for joint optimization. The joint resource allocation is decomposed and solved by dynamic subcarrier allocation algorithm and adaptive power allocation algorithm. Simulation results show the effectiveness of the proposed cooperative scheme.

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