Resource Allocation Techniques for SC-FDMA Networks

2021 ◽  
pp. 121-156
Author(s):  
Muhammad Irfan ◽  
Ayaz Ahmad ◽  
Raheel Ahmed
Keyword(s):  
Resource Allocation ◽  
Average Power ◽  
Mobile Terminal ◽  
Radio Spectrum ◽  
Future Research ◽  
Power Budget ◽  
Knowledge Based ◽  
Single Carrier ◽  
Channel Knowledge ◽  
Efficient Resource

Single carrier frequency division multiple access (SC-FDMA) is a promising uplink transmission technique that has the characteristic of low peak to average power ratio. The mobile terminal uplink transmission depends on the batteries with limited power budget. Moreover, the increasing number of mobile users needs to be accommodated in the limited available radio spectrum. Therefore, efficient resource allocation schemes are essential for optimizing the energy consumption and improving the spectrum efficiency. This chapter presents a comprehensive and systematic survey of resource allocation in SC-FDMA networks. The survey is carried out under two major categories that include centralized and distributed approaches. The schemes are also classified under various rubrics including optimization objectives and constraints considered, single-cell and multi-cell scenarios, solution types, and perfect/imperfect channel knowledge-based schemes. The advantages and limitations pertaining to these categories/rubrics have been highlighted, and directions for future research are identified.

Cooperative Cognitive Radio Networking

2015 ◽  
pp. 427-453
Author(s):  
Bin Cao ◽  
Qinyu Zhang ◽  
Hao Liang ◽  
Gang Fu ◽  
Jon W. Mark
Keyword(s):  
Resource Allocation ◽  
Cognitive Radio ◽  
Energy Efficient ◽  
Low Complexity ◽  
Radio Spectrum ◽  
Two Phase ◽  
The Sustainable Development ◽  
Phase Cooperation ◽  
Efficient Resource ◽  
Energy Efficient Resource Allocation

Radio spectrum underutilization and energy inefficiency become urgent bottleneck problems to the sustainable development of wireless technologies. The research philosophies of wireless communications have been shifted from balancing reliability-efficiency tradeoff in the link level to seeking spectrum-energy efficiency in the network level. Global spectrum-energy efficient designs attract significant attention to improving utilization and efficiency, wherein cognitive radio networks and energy-efficient resource allocation are of particular interests. In this chapter, the authors first provide a systematic study on Cooperative Cognitive Radio Networking (CCRN). As an effort to shed light on addressing spectrum-energy inefficiency at a low complexity, an orthogonal modulation enabled two-phase cooperation framework and an Orthogonally Dual-Polarized Antenna (ODPA) based framework, as well as their resource allocation problems are given and tackled.

scholarly journals A Survey on Resource Allocation for 5G Heterogeneous Networks: Current Research, Future Trends and Challenges

2020 ◽  
Author(s):  
Yongjun Xu ◽  
Guan Gui ◽  
Guoquan Li ◽  
Miao Liu ◽  
Haris Gacanin ◽  
...  
Keyword(s):  
Resource Allocation ◽  
Heterogeneous Networks ◽  
Spectrum Sharing ◽  
Limited Resource ◽  
Small Cells ◽  
Future Research ◽  
Sixth Generation ◽  
Communication Environments ◽  
Efficient Resource ◽  
Comprehensive Survey

In the fifth-generation (5G) wireless communications system, various service requirements under different communication environments are expected to be satisfied. As a new evolution network structure, heterogeneous networks (HetNet) have been fully studied in recent years. In contrast to conventional homogeneous networks, the key feature of HetNet is to increase the opportunity of spatial resource reuse and improve the quality of service of users by allowing small cells to cooperate in macrocell networks. However, since the mutual interference among different users and the limited resource are existing in HetNets, efficient resource allocation (RA) schemes are very important to reduce the interference and achieve spectrum sharing. In this paper, we provide a comprehensive survey on RA in HetNets for 5G communications. Specifically, we first introduce the definition and different network scenarios of HetNet. Second, RA models are discussed. Then, we present classification to analyze current RA schemes in the existing references. Finally, some challenging open issues and future research trends are addressed in this field. We also provide two effective approaches for the sixth-generation (6G) communications to solve the RA problems of future HetNets, namely, a learning-based approach and a control theory-based approach. This paper provides important information on HetNets, which can be used to guide the development of more efficient RA schemes in this area.

scholarly journals Energy-Efficient Resource Allocation for 6G Backscatter-Enabled NOMA IoV Networks

2021 ◽  
Author(s):  
Wali Ullah Khan ◽  
Muhammad Awais Javed ◽  
Tu N. Nguyen ◽  
Shafiullah Khan ◽  
Basem M. Elhalawany
Keyword(s):  
Resource Allocation ◽  
Energy Efficient ◽  
Interference Cancellation ◽  
Total Power ◽  
Power Budget ◽  
Minimum Data ◽  
Joint Problem ◽  
Efficient Resource ◽  
Energy Efficient Resource Allocation ◽  
Superimposed Signals

<div>This paper proposes an energy-efficient resource allocation framework for the AmBC-enabled NOMA IoV network under imperfect Successive Interference Cancellation (SIC) decoding. In particular, multiple Road-Side Units (RSUs) transmit superimposed signals to their associated IoVs utilizing downlink NOMA transmission. Meanwhile, the Backscatter Tags (BackTags) also transmit data symbols towards nearby IoVs by reflecting the superimposed signals of RSUs. Thus, the objective is to maximize the total energy efficiency of the NOMA IoV network subject to the minimum data rate of all IoVs. A joint problem that simultaneously optimizes the total power budget of each RSU, power allocation coefficient of IoVs and reflection power of BackTags under imperfect SIC decoding is formulated.</div>

scholarly journals A Survey on Resource Allocation for 5G Heterogeneous Networks: Current Research, Future Trends and Challenges

2020 ◽  
Author(s):  
Yongjun Xu ◽  
Guan Gui ◽  
Guoquan Li ◽  
Miao Liu ◽  
Haris Gacanin ◽  
...  
Keyword(s):  
Resource Allocation ◽  
Heterogeneous Networks ◽  
Spectrum Sharing ◽  
Limited Resource ◽  
Small Cells ◽  
Future Research ◽  
Sixth Generation ◽  
Communication Environments ◽  
Efficient Resource ◽  
Comprehensive Survey

In the fifth-generation (5G) wireless communications system, various service requirements under different communication environments are expected to be satisfied. As a new evolution network structure, heterogeneous networks (HetNet) have been fully studied in recent years. In contrast to conventional homogeneous networks, the key feature of HetNet is to increase the opportunity of spatial resource reuse and improve the quality of service of users by allowing small cells to cooperate in macrocell networks. However, since the mutual interference among different users and the limited resource are existing in HetNets, efficient resource allocation (RA) schemes are very important to reduce the interference and achieve spectrum sharing. In this paper, we provide a comprehensive survey on RA in HetNets for 5G communications. Specifically, we first introduce the definition and different network scenarios of HetNet. Second, RA models are discussed. Then, we present classification to analyze current RA schemes in the existing references. Finally, some challenging open issues and future research trends are addressed in this field. We also provide two effective approaches for the sixth-generation (6G) communications to solve the RA problems of future HetNets, namely, a learning-based approach and a control theory-based approach. This paper provides important information on HetNets, which can be used to guide the development of more efficient RA schemes in this area.

scholarly journals Energy-Efficient Resource Allocation for 6G Backscatter-Enabled NOMA IoV Networks

2021 ◽  
Author(s):  
Wali Ullah Khan ◽  
Muhammad Awais Javed ◽  
Tu N. Nguyen ◽  
Shafiullah Khan ◽  
Basem M. Elhalawany
Keyword(s):  
Resource Allocation ◽  
Energy Efficient ◽  
Interference Cancellation ◽  
Total Power ◽  
Power Budget ◽  
Minimum Data ◽  
Joint Problem ◽  
Efficient Resource ◽  
Energy Efficient Resource Allocation ◽  
Superimposed Signals

<div>This paper proposes an energy-efficient resource allocation framework for the AmBC-enabled NOMA IoV network under imperfect Successive Interference Cancellation (SIC) decoding. In particular, multiple Road-Side Units (RSUs) transmit superimposed signals to their associated IoVs utilizing downlink NOMA transmission. Meanwhile, the Backscatter Tags (BackTags) also transmit data symbols towards nearby IoVs by reflecting the superimposed signals of RSUs. Thus, the objective is to maximize the total energy efficiency of the NOMA IoV network subject to the minimum data rate of all IoVs. A joint problem that simultaneously optimizes the total power budget of each RSU, power allocation coefficient of IoVs and reflection power of BackTags under imperfect SIC decoding is formulated.</div>

The Knowledge Creation Organization: The Case of Alphana

2012 ◽  
pp. 78-90
Author(s):  
Thang Nguyen Ngoc
Keyword(s):  
Competitive Advantage ◽  
Knowledge Creation ◽  
Future Research ◽  
Sustainable Competitive Advantage ◽  
Knowledge Based ◽  
The Future

Knowledge and the capability to create and utilize knowledge today are consid- ered to be the most important sources of a firm’s sustainable competitive advantage. This paper aims to advance understanding of the knowledge creation of firm in Vietnam by studying Alphanam Company. The case illustrates how knowledge- based management pursues a vision for the future based on ideals that consider the relationships of people in society. The finding shows that the case succeeded because of their flexibility and mobility to keep meeting to the changing needs of the customers or stakeholders. The paper also provided some suggestions for future research to examine knowledge-based management of the companies in a different industry segments and companies originating in other countries

Efficient Resource Allocation for Multiclass Services in Multiuser OFDM Systems

2009 ◽  
Vol E92-B (2) ◽  
pp. 533-543 ◽  
Author(s):  
Jae Soong LEE ◽  
Jae Young LEE ◽  
Soobin LEE ◽  
Hwang Soo LEE
Keyword(s):  
Resource Allocation ◽  
Ofdm Systems ◽  
Efficient Resource ◽  
Multiuser Ofdm
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